WO2014050941A1 - 処理液供給装置、基板処理装置、処理液供給方法、基板処理方法、処理液処理装置および処理液処理方法 - Google Patents
処理液供給装置、基板処理装置、処理液供給方法、基板処理方法、処理液処理装置および処理液処理方法 Download PDFInfo
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- WO2014050941A1 WO2014050941A1 PCT/JP2013/076006 JP2013076006W WO2014050941A1 WO 2014050941 A1 WO2014050941 A1 WO 2014050941A1 JP 2013076006 W JP2013076006 W JP 2013076006W WO 2014050941 A1 WO2014050941 A1 WO 2014050941A1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/02041—Cleaning
- H01L21/02043—Cleaning before device manufacture, i.e. Begin-Of-Line process
- H01L21/02052—Wet cleaning only
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67017—Apparatus for fluid treatment
- H01L21/67028—Apparatus for fluid treatment for cleaning followed by drying, rinsing, stripping, blasting or the like
- H01L21/6704—Apparatus for fluid treatment for cleaning followed by drying, rinsing, stripping, blasting or the like for wet cleaning or washing
- H01L21/67051—Apparatus for fluid treatment for cleaning followed by drying, rinsing, stripping, blasting or the like for wet cleaning or washing using mainly spraying means, e.g. nozzles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67017—Apparatus for fluid treatment
- H01L21/67028—Apparatus for fluid treatment for cleaning followed by drying, rinsing, stripping, blasting or the like
- H01L21/6704—Apparatus for fluid treatment for cleaning followed by drying, rinsing, stripping, blasting or the like for wet cleaning or washing
- H01L21/67057—Apparatus for fluid treatment for cleaning followed by drying, rinsing, stripping, blasting or the like for wet cleaning or washing with the semiconductor substrates being dipped in baths or vessels
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/677—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for conveying, e.g. between different workstations
- H01L21/67739—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for conveying, e.g. between different workstations into and out of processing chamber
- H01L21/6776—Continuous loading and unloading into and out of a processing chamber, e.g. transporting belts within processing chambers
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21K—TECHNIQUES FOR HANDLING PARTICLES OR IONISING RADIATION NOT OTHERWISE PROVIDED FOR; IRRADIATION DEVICES; GAMMA RAY OR X-RAY MICROSCOPES
- G21K5/00—Irradiation devices
Definitions
- the present invention relates to a processing liquid supply apparatus, a substrate processing apparatus, a processing liquid supply method, a substrate processing method, a processing liquid processing apparatus, and a processing liquid processing method.
- the processing object using the processing liquid includes a substrate, a container, an optical component, and the like.
- Substrates used as objects to be processed include, for example, semiconductor wafers, glass substrates for liquid crystal display devices, substrates for plasma displays, substrates for FED (Field Emission Display), substrates for OLED (organic electroluminescence), substrates for optical disks, and magnetism.
- Substrates such as a disk substrate, a magneto-optical disk substrate, a photomask substrate, a ceramic substrate, and a solar cell substrate are included.
- a treatment liquid is supplied to the surface of a substrate such as a semiconductor wafer or a glass substrate for a liquid crystal display panel, and the surface of the substrate is washed with the treatment liquid.
- a substrate processing apparatus that performs a single wafer cleaning process that processes substrates one by one, a spin chuck that rotates the substrate while holding the substrate substantially horizontally with a plurality of chuck pins, and the spin chuck And a processing liquid nozzle for supplying a processing liquid to the surface of the substrate rotated by.
- the substrate is rotated by the spin chuck. Then, the chemical solution is supplied from the nozzle to the surface of the rotating substrate. The chemical solution supplied onto the surface of the substrate flows on the surface of the substrate toward the peripheral edge under the centrifugal force due to the rotation of the substrate. As a result, the chemical solution spreads over the entire surface of the substrate, and the treatment of the substrate surface with the chemical solution is achieved. And after the process by this chemical
- pure water is supplied from the treatment liquid nozzle to the surface of the substrate rotated by the spin chuck, and the pure water spreads by receiving the centrifugal force due to the rotation of the substrate, so that the chemical solution adhered to the surface of the substrate Is washed away.
- the rotation speed of the substrate by the spin chuck is increased, and spin dry treatment is performed in which pure water adhering to the substrate is shaken off and dried (see Patent Document 1 below).
- the substrate may be fluidly charged.
- the substrate is a glass substrate or a silicon wafer
- the substrate is positively charged. If the substrate is charged, there is a risk of destruction of devices formed on the surface of the substrate when the discharge of the charge occurs.
- a batch type substrate processing apparatus that processes a plurality of substrates at once is also used.
- the batch-type substrate processing apparatus includes, for example, a plurality of processing tanks including a chemical processing tank storing a chemical and a rinsing processing tank storing water. When processing is performed on a plurality of substrates at once, the substrates are sequentially immersed in the chemical solution processing tank and the rinse processing tank.
- the substrate is charged during the rinsing process in the rinsing tank.
- the substrate is a silicon wafer or a glass substrate
- the substrate is positively charged. If the substrate after a series of treatments is charged, there is a risk that the device formed on the surface of the substrate will be destroyed when the discharge of the charge occurs.
- the same problem may occur when the object to be treated is charged before being carried into the treatment tank. Therefore, it is required to perform a rinsing process (a process using a processing liquid) while preventing the substrate from being charged and eliminating the charge.
- Antistatic and neutralization in processing using a processing solution are not limited to the case where the processing target is a substrate, but are common issues when the processing target is a container or other optical component.
- an object of the present invention is to provide a processing liquid supply apparatus and a processing liquid supply method capable of supplying a processing liquid to the processing object while preventing or neutralizing the processing object.
- Another object of the present invention is to provide a substrate processing apparatus and a substrate processing method capable of performing processing using a processing liquid on the substrate while preventing or eliminating the charge of the substrate.
- Another object of the present invention is to provide a processing liquid processing apparatus and a processing liquid processing method capable of performing processing using a processing liquid on a processing object while preventing or neutralizing the processing object. It is.
- a first aspect of the present invention is a processing liquid supply device for discharging a processing liquid from a discharge port and supplying the processing liquid to a processing object, and a first pipe through which the processing liquid can circulate
- the processing liquid supply apparatus includes: a first pipe whose inside communicates with the discharge port; and an X-ray irradiation unit that irradiates the processing liquid existing in the first pipe with X-rays. .
- the processing liquid existing in the first pipe is irradiated with X-rays. Further, the processing liquid discharged from the discharge port communicating with the inside of the first pipe is supplied to the processing object.
- irradiation portion of the treatment liquid In the portion of the treatment liquid that is irradiated with X-rays (hereinafter referred to as “irradiation portion of the treatment liquid”), electrons are emitted from the water molecules by excitation of the water molecules, and as a result, positive ions and electrons of the water molecules Is formed in a plasma state.
- the processing liquid discharged from the discharge port is supplied to the processing object and comes into contact with the processing object.
- the case where the processing liquid discharged from the discharge port is connected to the liquid state between the discharge port and the processing target will be considered.
- the processing object and the irradiated portion of the processing liquid are connected via the processing liquid.
- the processing object can be neutralized through the processing liquid connected to the liquid state according to the principle described above.
- the treatment liquid can be supplied to the treatment object while preventing the charge of the treatment object or eliminating the charge.
- X-ray means an electromagnetic wave having a wavelength of about 0.001 nm to 10 nm, “soft X-ray” having a relatively long wavelength (about 0.1 nm to 10 nm), This includes “hard X-rays” (about 0.001 nm to 0.1 nm) having a relatively short wavelength.
- processing object includes a substrate, a container, an optical component, and the like.
- the first pipe has an opening in its pipe wall, and the opening is closed by a window member formed using a material that can transmit X-rays.
- the X-ray irradiation unit irradiates the processing liquid existing in the first pipe with X-rays through the window member.
- the window member is formed using a material capable of transmitting X-rays. And the X-ray irradiated from the X-ray irradiation means is irradiated to the process liquid which exists in the said 1st piping through a window member. Thereby, the plasma state in which positive ions of water molecules and electrons are mixed can be satisfactorily formed in the irradiated portion of the treatment liquid.
- the window member may be formed using beryllium or polyimide resin.
- the substance has a small atomic weight such as beryllium, X-rays with low penetrating power can be transmitted. Therefore, by forming the window member using beryllium, X-rays can pass through the window member.
- the window member when the window member is formed using polyimide resin, X-rays can pass through the window member. Moreover, since the polyimide resin is excellent in chemical stability, the window member can be used over a long period of time.
- the wall surface of the window member on the side where the treatment liquid exists is hydrophilic. In this case, it is possible to suppress or prevent air bubbles from being mixed between the wall surface and the treatment liquid. Thereby, X-ray
- the wall surface of the window member on the side where the treatment liquid is present may be coated with a film. Thereby, an irradiation window can be protected.
- the window member when the window member is formed using beryllium having poor acid resistance, the window member can be well protected from the acidic treatment liquid.
- This film is preferably formed using a hydrophilic material. In this case, it is possible to suppress or prevent air bubbles from being mixed between the film and the treatment liquid. Thereby, X-ray
- the film may be a film containing one or more materials of polyimide resin, diamond-like carbon, fluorine resin, and hydrocarbon resin.
- the X-ray irradiation means may include an X-ray generator that has an irradiation window disposed to face the window member, generates X-rays, and irradiates the generated X-rays from the irradiation window. Good.
- the X-ray generated by the X-ray generator is irradiated from the irradiation window of the X-ray generator to the processing liquid flowing in the first pipe.
- the X-ray irradiation means may further include a cover surrounding the X-ray generator with a space from the X-ray generator, and a gas supply means for supplying a gas to the inside of the cover. .
- the X-ray generator generates heat by driving the X-ray generator.
- the X-ray generator can be cooled, and the temperature rise in the ambient atmosphere of the X-ray generator can be suppressed.
- the first pipe includes a processing liquid pipe through which a processing liquid flows toward the discharge port, and the X-ray irradiating means is a process that circulates in the first pipe.
- the liquid may be irradiated with the X-ray.
- the apparatus further includes a processing liquid pipe through which the processing liquid flows toward the discharge port, and the first pipe includes a branch pipe branched from the processing liquid pipe. Also good. In this case, the X-ray is irradiated to the processing liquid present in the branch pipe.
- the processing liquid discharged from the discharge port flows along the fibrous substance, even when the discharge flow rate of the processing liquid from the discharge port is a small flow rate, the processing liquid discharged from the discharge port An aspect can be made into the continuous flow form connected to both the said discharge outlet and the said process target object. Therefore, it is possible to connect the processing object and the irradiated portion of the processing liquid through the processing liquid with a simple configuration.
- the tip of the fibrous substance may be in contact with the liquid film of the processing liquid or the processing object.
- the mode of the processing liquid discharged from the discharge port is easily maintained in the continuous flow as described above.
- the electrode may further include an electrode disposed downstream of the X-ray irradiation position in the first pipe in the treatment liquid flow direction and a power source for applying a voltage to the electrode.
- the power supply applies a voltage to the electrodes in conjunction with the X-ray irradiation to the treatment liquid existing in the first pipe.
- a voltage to the electrode By applying a voltage to the electrode, a positive charge or a negative charge can be generated in the electrode.
- the electrode may be disposed at the tip of the first pipe.
- the electrode is arrange
- the processing liquid supply device includes a processing liquid detection means for detecting the presence or absence of a processing liquid at the irradiation position of the X-ray in the first pipe, and when the processing liquid is present at the irradiation position, the X-ray An X-ray irradiation control unit that performs X-ray irradiation by the irradiation unit and that does not perform X-ray irradiation by the X-ray irradiation unit when the treatment liquid is not present at the irradiation position may be further included.
- the X-rays may leak out of the first pipe.
- 1st aspect of this invention provides the substrate processing apparatus which contains the board
- X-rays are irradiated to the processing liquid existing in the first pipe of the processing liquid supply apparatus.
- the processing liquid discharged from the discharge port communicating with the inside of the first pipe is supplied to the main surface of the substrate.
- electrons are emitted from the water molecules by excitation of the water molecules, and as a result, a plasma state in which positive ions and electrons of the water molecules are mixed is formed.
- the processing liquid discharged from the discharge port is supplied to the main surface of the substrate and comes into contact with the main surface of the substrate.
- a case where the processing liquid discharged from the discharge port is connected in a liquid state between the discharge port and the main surface of the substrate will be considered.
- the main surface of the substrate and the irradiated portion of the processing liquid are connected via the processing liquid.
- the processing liquid in which electrons from the irradiated portion of the processing liquid are in contact with the substrate due to a potential difference between the irradiated portion of the processing liquid and the positively charged substrate Toward the liquid, it moves along the processing liquid connected to the liquid state. As a result, since the processing liquid in contact with the substrate has a large amount of electrons, the positively charged substrate is neutralized.
- the object to be treated can be neutralized through the treatment liquid connected to the liquid according to the principle described above. As a result, it is possible to prevent device destruction due to charging of the substrate.
- the substrate can be treated with the treatment liquid while preventing or eliminating the charge of the substrate.
- the substrate holding unit includes a substrate holding and rotating unit that rotates a substrate around a predetermined rotation axis while holding the substrate in a horizontal posture
- the substrate processing apparatus includes the substrate holding and rotating unit.
- a cylindrical liquid receiving member surrounding the periphery of the means; and the processing liquid supply device further includes a processing liquid pipe through which the processing liquid flows toward the discharge port, and the processing liquid supply device includes:
- the first pipe includes a branch pipe branched from the processing liquid pipe, and the branch pipe has a liquid receiving outlet for discharging the processing liquid toward the liquid receiving member.
- the X-ray irradiation means irradiates the processing liquid flowing through the branch pipe while discharging the processing liquid from the liquid receiving discharge port toward the liquid receiving member.
- a plasma state in which positive ions of water molecules and electrons are mixed is formed in the irradiated portion of the treatment liquid in the branch pipe.
- the processing liquid discharged from the liquid receiving discharge port is supplied to the liquid receiving member and comes into contact with the liquid receiving member.
- the processing liquid discharged from the liquid receiving discharge port is connected in a liquid state between the liquid receiving discharge port and the liquid receiving member, the liquid receiving member and the irradiated portion of the processing liquid receive the processing liquid. Connected through.
- the liquid receiving member is positively charged, electrons from the irradiated portion of the processing liquid are received by the potential difference between the irradiated portion of the processing liquid and the positively charged liquid receiving member. It moves along the treatment liquid connected to the liquid toward the treatment liquid in contact with the member. As a result, since the processing liquid in contact with the liquid receiving member has a large amount of electrons, the positively charged liquid receiving member is neutralized.
- the substrate holding means includes substrate holding rotating means for rotating the substrate around a predetermined vertical rotation axis while holding the substrate in a horizontal posture
- the substrate holding rotating means includes the substrate A support member that is in contact with at least a part of the lower surface of the substrate and supports the substrate in a horizontal posture, the support member is formed using a porous material, and the processing liquid discharged from the discharge port Supplied to the support member.
- the processing liquid supplied to the support member is impregnated inside the support member.
- the treatment liquid impregnated inside the support member oozes out from the support member and forms a liquid film of the treatment liquid on the support member.
- the liquid film of the processing liquid comes into contact with the lower surface of the substrate, the lower surface of the substrate is processed.
- the discharge port is connected to the discharge port through the processing liquid impregnated inside the support member.
- the lower surface of the substrate is connected in a liquid state, and therefore, the lower surface of the substrate and the irradiated portion of the processing liquid are connected via the processing liquid.
- the treatment using the treatment liquid can be performed on the lower surface of the substrate while preventing the charge of the substrate and eliminating the charge.
- the substrate holding means may include substrate holding and conveying means for conveying the substrate in a predetermined conveying direction while holding the substrate.
- the processing liquid discharged from the discharge port is supplied to the main surface (upper surface) of the substrate transported by the substrate holding transport means, and comes into contact with the main surface (upper surface) of the substrate.
- the processing liquid in which electrons from the irradiated portion of the processing liquid are in contact with the substrate due to a potential difference between the irradiated portion of the processing liquid and the positively charged substrate Toward the liquid, it moves along the processing liquid connected to the liquid state. As a result, since the processing liquid in contact with the substrate has a large amount of electrons, the positively charged substrate is neutralized.
- the substrate holding and transporting means is transported while holding the substrate in a posture that is inclined along the transport direction and with respect to a horizontal plane.
- the processing liquid discharged from the discharge port flows on the substrate along the inclined surface. Therefore, since the processing liquid does not stay on the substrate, it is possible to prevent or suppress the load from being concentrated on a predetermined portion of the substrate due to the weight of the processing liquid. Further, since the processing liquid flows smoothly on the substrate, a liquid film of the processing liquid spreading over a wide range can be formed on the upper surface of the substrate. As a result, it is possible to prevent charge and eliminate static electricity over a wide range of the substrate.
- 1st aspect of this invention is a processing liquid supply method which discharges a processing liquid from the discharge outlet of a processing liquid supply apparatus, and supplies this processing liquid to a process target object, Comprising: The said discharge outlet is set to the said process target object.
- the X-ray irradiation step of irradiating the X-ray to the treatment liquid existing inside the first pipe communicating with the discharge port, And a processing liquid discharge step for discharging the processing liquid from the discharge port.
- a processing liquid supply method is provided in which the processing liquid is in a liquid state between the discharge port and the processing object. To do.
- the processing liquid existing in the first pipe is irradiated with X-rays. Further, the processing liquid discharged from the discharge port communicating with the inside of the first pipe is supplied to the processing object. In the portion of the treatment liquid that is irradiated with X-rays, electrons are emitted from the water molecules by excitation of the water molecules, and as a result, a plasma state in which positive ions and electrons of the water molecules are mixed is formed.
- the processing liquid discharged from the discharge port is connected in a liquid state between the discharge port and the object to be processed.
- the processing object and the irradiated portion of the processing liquid are connected via the processing liquid.
- the processing object can be neutralized through the processing liquid connected to the liquid state according to the principle described above.
- the treatment liquid can be supplied to the treatment object while preventing the charge of the treatment object or eliminating the charge.
- the processing liquid discharged from the discharge port has a continuous flow shape connected to both the discharge port and the processing object.
- the processing object and the irradiated portion of the processing liquid can be easily connected via the processing liquid.
- the processing object may be a second pipe through which liquid flows, or a container for storing articles.
- 1st aspect of this invention is a substrate processing method which processes a board
- a processing liquid discharge step of discharging a processing liquid from the discharge port, and in the processing liquid discharge step, the processing liquid is connected in a liquid state between the discharge port and the main surface of the substrate.
- the processing liquid existing in the first pipe is irradiated with X-rays.
- the processing liquid discharged from the discharge port communicating with the inside of the first pipe is supplied to the main surface of the substrate.
- electrons are emitted from the water molecules by excitation of the water molecules, and as a result, a plasma state in which positive ions and electrons of the water molecules are mixed is formed.
- the processing liquid discharged from the discharge port is supplied to the upper surface of the substrate and comes into contact with the upper surface of the substrate.
- the processing liquid discharged from the discharge port is connected in a liquid state between the discharge port and the main surface of the substrate. In this case, the main surface of the substrate and the irradiated portion of the processing liquid are connected via the processing liquid.
- the processing liquid in which electrons from the irradiated portion of the processing liquid are in contact with the substrate due to a potential difference between the irradiated portion of the processing liquid and the positively charged substrate Toward the liquid, it moves along the processing liquid connected to the liquid state. As a result, since the processing liquid in contact with the substrate has a large amount of electrons, the positively charged substrate is neutralized.
- the object to be treated can be neutralized through the treatment liquid connected to the liquid according to the principle described above. As a result, it is possible to prevent device destruction due to charging of the substrate.
- the substrate can be treated with the treatment liquid while preventing or eliminating the charge of the substrate.
- the processing liquid discharged from the discharge port has a continuous flow shape connected to both the discharge port and the main surface of the substrate.
- substrate and the irradiation part of a process liquid can be connected easily via a process liquid.
- the substrate is held in a horizontal posture by the substrate holding means, and the opposing arrangement step is such that the discharge port faces the upper surface of the substrate held by the substrate holding means.
- the processing liquid discharged from the discharge port is supplied to the upper surface of the substrate and comes into contact with the upper surface of the substrate.
- the processing liquid discharged from the discharge port is connected in a liquid state between the discharge port and the upper surface of the substrate, and the processing object and the irradiated portion of the processing liquid are connected via the processing liquid.
- the substrate is held in a horizontal posture by the substrate holding means, and the opposing arrangement step is such that the discharge port is placed on the lower surface of the substrate held by the substrate holding means.
- the substrate processing method is executed in parallel with the processing liquid discharge step, and rotates the substrate about a predetermined vertical rotation axis, and the processing liquid
- an upper surface processing liquid supply step for supplying a processing liquid to the upper surface of the substrate is further included.
- the processing liquid discharged from the discharge port is supplied to the lower surface of the substrate and comes into contact with the lower surface of the substrate.
- the processing liquid in contact with the lower surface of the substrate spreads to the peripheral edge along the lower surface of the substrate, and a liquid film of the processing liquid is formed over the entire lower surface of the substrate.
- the processing liquid that reaches the peripheral edge of the lower surface of the substrate goes around the peripheral end surface of the substrate and reaches the peripheral edge of the upper surface of the substrate.
- the processing liquid is supplied to the upper surface of the substrate.
- the processing liquid supplied to the substrate receives a centrifugal force due to the rotation of the substrate and spreads the upper surface of the substrate toward the peripheral portion, thereby forming a liquid film of the processing liquid over the entire upper surface of the substrate.
- the processing liquid that has come around from the lower surface side of the substrate merges with the liquid film of the processing liquid on the upper surface side of the substrate, and as a result, the liquid film of the processing liquid on the upper surface side of the substrate and the liquid film of the processing liquid on the lower surface side of the substrate. Will be connected.
- both the upper surface of the substrate and the lower surface of the substrate connect the irradiated portions of the processing liquid via the processing liquid. Therefore, it is possible to prevent charging and charge removal on both the upper and lower surfaces of the substrate.
- the process may further include a second X-ray irradiation process that is performed in parallel with the liquid draining process or the drying process that is performed after the processing liquid discharge process is completed and that irradiates the main surface of the substrate with X-rays.
- the processing liquid is removed from the main surface of the substrate by the liquid draining process or the drying process.
- X-rays are irradiated to the main surface of the substrate immediately after the treatment liquid is removed.
- it is possible to more reliably achieve prevention of static charge and neutralization of the substrate.
- a substrate holding means for holding a substrate, an X-ray irradiation means for irradiating the surface of the substrate held by the substrate holding means with X-rays, and the substrate holding means.
- the processing liquid supply means for supplying the processing liquid to the surface of the substrate, and the X-ray irradiation means and the processing liquid supply means so that the supply of the processing liquid to the surface of the substrate and the X-ray irradiation are performed in parallel.
- a control means for controlling the substrate.
- the liquid film of the processing liquid that contacts the surface is formed on the surface of the substrate.
- X-rays are irradiated to the liquid film of the processing liquid.
- a plasma state in which a large amount of electrons and a large amount of positive ions of water molecules coexist as a result of electrons being emitted from the water molecules by excitation of water molecules. Is formed.
- electrons generated in the processing liquid due to X-ray irradiation are generated on the substrate through the liquid film of the processing liquid.
- the X-ray irradiation means includes an irradiation window, and includes an X-ray generator that generates X-rays and irradiates the generated X-rays from the irradiation window.
- the surface of the substrate is irradiated with X-rays generated by the X-ray generator from the irradiation window of the X-ray generator.
- the substrate processing apparatus further includes a cover that surrounds the X-ray generator with a space therebetween, and an opening is formed in the cover at a portion facing the irradiation window.
- the periphery of the X-ray generator is covered with a cover.
- the cover has an opening at a portion facing the irradiation window, and X-rays from the irradiation window are guided to the surface of the substrate through the opening.
- the substrate processing apparatus further includes a gas supply unit that supplies a gas into the cover.
- a gas supply unit that supplies a gas into the cover.
- the gas supplied from the gas supply means to the inside of the cover include CDA (low humidity clean air) and nitrogen gas.
- the gas supply means may supply a gas having a temperature higher than room temperature.
- the high-temperature gas supplied into the cover reaches the outer surface of the irradiation window through the space between the X-ray generator and the cover.
- the high-temperature gas water droplets adhering to the outer surface of the irradiation window can be removed by evaporation, thereby suppressing or preventing fogging of the irradiation window.
- the outer surface of the irradiation window may be coated with a film. Thereby, an irradiation window can be protected.
- the irradiation window is formed using beryllium having poor acid resistance, the irradiation window can be well protected from the acidic treatment liquid.
- This film is preferably formed using a water-repellent material.
- moisture is prevented from precipitating in the form of a film over the entire irradiation window, and the moisture is made into fine water droplets.
- Water droplets adhering to the outer surface of the irradiation window are in a state where they can easily move on the outer surface. Therefore, it is possible to easily remove water droplets from the outer surface of the irradiation window, thereby suppressing or preventing the irradiation window from being fogged.
- the substrate processing apparatus preferably includes both the coating by the film on the outer surface of the irradiation window and the gas supply means. Since the water droplets adhering to the outer surface of the irradiation window are in a state of being easily moved on the outer surface, the water droplets adhering to the outer surface of the irradiation window move by receiving the air flow formed in the space. Thereby, water droplets can be favorably removed from the outer surface of the irradiation window, and the irradiation window can be reliably prevented from being fogged.
- the film may be a polyimide resin film.
- the film may be a diamond-like carbon film.
- the film may be an amorphous fluororesin film.
- a heating member is disposed around the opening of the cover and at least one of the irradiation window.
- the periphery of the irradiation window of the X-ray generator is heated by the heat generating member. Therefore, water droplets adhering to the outer surface of the irradiation window can be removed by evaporation, thereby suppressing or preventing fogging of the irradiation window.
- the substrate processing apparatus may further include a shielding member that is disposed to face the surface of the substrate held by the substrate holding means and shields a space on the surface of the substrate from the periphery thereof.
- the shielding member is for keeping X-rays irradiated from the irradiation window in a space on the surface of the substrate.
- the shielding member may be provided so as to be movable together with the cover.
- the substrate processing apparatus further includes moving means for moving the X-ray irradiation means along the surface of the substrate held by the substrate holding means.
- the X-ray irradiation means is moved along the surface of the substrate while the X-ray irradiation means is irradiated with the X-ray while the X-ray irradiation means is opposed to the surface of the substrate.
- the ionized processing liquid can be supplied to the entire surface of the substrate.
- the substrate can be neutralized over the entire area of the substrate.
- the treatment liquid may be water.
- a processing liquid supply step for supplying a processing liquid to the surface of the substrate held by the substrate holding means, and a substrate held by the substrate holding means in parallel with the processing liquid supply step.
- An X-ray irradiation step of irradiating the surface of the substrate with X-rays is provided.
- a liquid film of the processing liquid that contacts the surface is formed on the surface of the substrate.
- X-rays are irradiated to the liquid film of the processing liquid.
- a plasma state in which a large amount of electrons and a large amount of positive ions of water molecules coexist as a result of electrons being emitted from the water molecules by excitation of water molecules. Is formed.
- electrons generated in the processing liquid due to X-ray irradiation are generated on the substrate through the liquid film of the processing liquid.
- a third aspect of the present invention is a processing liquid processing apparatus that performs processing by immersing a processing object in the processing liquid, storing the processing liquid and immersing the processing object in the processing liquid. And the processing liquid stored in the processing tank or a pipe through which the processing liquid can flow, and the processing liquid existing in the pipe communicating with the processing tank is irradiated with X-rays
- a processing liquid processing apparatus including X-ray irradiation means.
- X-rays are irradiated to the processing liquid stored in the processing tank or the processing liquid existing inside the pipe communicating with the processing tank.
- treatment liquid irradiation portion In a portion of the treatment liquid that is irradiated with X-rays (treatment liquid irradiation portion), electrons are emitted from the water molecules by excitation of water molecules, and as a result, plasma in which positive ions and electrons of water molecules are mixed. A state is formed.
- the processing object immersed in the processing liquid stored in the processing tank and the irradiated portion of the processing liquid are stored in the processing tank. It is connected through the processing solution.
- the processing object is positively charged, electrons from the irradiation part of the processing liquid are directed toward the processing object due to a potential difference between the irradiation part of the processing liquid and the processing object positively charged. It moves through the processing liquid stored in the processing tank. Thereby, as a result of supplying a large amount of electrons to the processing target, the positively charged processing target is neutralized.
- the processing object immersed in the processing liquid stored in the processing tank and the irradiated portion of the processing liquid are stored in the processing tank. It is connected via the processing liquid which has been processed and the processing liquid in the pipe.
- the processing object is positively charged, electrons from the irradiation part of the processing liquid are directed toward the processing object due to a potential difference between the irradiation part of the processing liquid and the processing object that is positively charged. It moves through the processing liquid stored in the processing tank and the processing liquid in the pipe. Thereby, as a result of supplying a large amount of electrons to the processing target, the positively charged processing target is neutralized.
- the treatment object is treated via the treatment liquid in the treatment tank or the treatment liquid in the pipe according to the principle described above. Can neutralize things.
- the pipe wall of the pipe or the wall of the processing tank has an opening, and the opening is closed by a window member formed using a material that can transmit X-rays.
- the X-ray irradiation means irradiates X-rays through the window member.
- the window member is formed using a material capable of transmitting X-rays. And the X-ray irradiated from the X-ray irradiation means is irradiated to the process liquid which exists in the said piping through a window member. Thereby, the plasma state in which positive ions of water molecules and electrons are mixed can be satisfactorily formed in the irradiated portion of the treatment liquid.
- the window member may be formed using beryllium or polyimide resin.
- the substance has a small atomic weight such as beryllium, X-rays with low penetrating power can be transmitted. Therefore, by forming the window member using beryllium, X-rays can pass through the window member.
- the window member when the window member is formed using a polyimide resin, X-rays can be transmitted through the window member. Moreover, since the polyimide resin is excellent in chemical stability, the window member can be used over a long period of time.
- the wall surface of the window member on the side where the treatment liquid exists is hydrophilic. In this case, it is possible to suppress or prevent air bubbles from being mixed between the wall surface and the treatment liquid. Thereby, it is possible to satisfactorily irradiate X-rays to the processing liquid existing in the pipe.
- the wall surface of the window member on the side where the treatment liquid is present may be coated with a film. Thereby, an irradiation window can be protected.
- the window member when the window member is formed using beryllium having poor acid resistance, the window member can be well protected from the acidic treatment liquid.
- This film is preferably formed using a hydrophilic material. In this case, it is possible to suppress or prevent air bubbles from being mixed between the film and the treatment liquid. Thereby, it is possible to satisfactorily irradiate X-rays to the processing liquid existing in the pipe.
- the film may be a film containing one or more materials of polyimide resin, diamond-like carbon, fluorine resin, and hydrocarbon resin.
- the X-ray irradiation means may include an X-ray generator that has an irradiation window disposed to face the window member, generates X-rays, and irradiates the generated X-rays from the irradiation window. Good.
- the X-ray generated by the X-ray generator is irradiated to the processing liquid flowing in the pipe from the irradiation window of the X-ray generator.
- the X-ray irradiation means may further include a cover surrounding the X-ray generator with a space from the X-ray generator, and a gas supply means for supplying a gas to the inside of the cover. .
- the X-ray generator generates heat by driving the X-ray generator.
- the X-ray generator can be cooled, and the temperature rise in the ambient atmosphere of the X-ray generator can be suppressed.
- the pipe includes a processing liquid supply pipe that communicates with the inside of the processing tank and supplies a processing liquid into the processing tank, and the X-ray irradiation means includes the processing liquid supply You may irradiate the said process liquid currently distribute
- the said processing tank stores the processing liquid
- the inner tank which immerses a process target object in the processing liquid
- the outer tank which collect
- the pipe includes an overflow pipe through which the processing liquid collected in the outer tank flows, and the X-ray irradiation means irradiates the processing liquid flowing through the overflow pipe with the X-ray. Also good.
- the treatment tank includes an inner tank for storing the treatment liquid and immersing the treatment object in the treatment liquid, and an outer tank for recovering the treatment liquid overflowing from the inner tank.
- the X-ray irradiation means may irradiate the X-ray to the processing liquid stored in the inner tank.
- the treatment tank includes an inner tank for storing the treatment liquid and immersing the treatment object in the treatment liquid, and an outer tank for recovering the treatment liquid overflowing from the inner tank.
- the pipe may include a pipe that communicates with the inside of the inner tank.
- the third aspect of the present invention is stored in the processing tank in parallel with the processing object immersion step for immersing the processing object in the processing liquid stored in the processing tank and the processing object immersion step.
- X-rays are irradiated to the processing liquid stored in the processing tank or the processing liquid existing inside the piping communicating with the processing tank.
- treatment liquid irradiation portion In a portion of the treatment liquid that is irradiated with X-rays (treatment liquid irradiation portion), electrons are emitted from the water molecules by excitation of water molecules, and as a result, plasma in which positive ions and electrons of water molecules are mixed. A state is formed.
- the processing object immersed in the processing liquid stored in the processing tank and the irradiated portion of the processing liquid are stored in the processing tank. It is connected through the processing solution.
- the processing object is positively charged, electrons from the irradiation part of the processing liquid are directed toward the processing object due to a potential difference between the irradiation part of the processing liquid and the processing object positively charged. It moves through the processing liquid stored in the processing tank. Thereby, as a result of supplying a large amount of electrons to the processing target, the positively charged processing target is neutralized.
- the processing object immersed in the processing liquid stored in the processing tank and the irradiated portion of the processing liquid are stored in the processing tank. It is connected via the processing liquid which has been processed and the processing liquid in the pipe.
- the processing object is positively charged, electrons from the irradiation part of the processing liquid are directed toward the processing object due to a potential difference between the irradiation part of the processing liquid and the processing object that is positively charged. It moves through the processing liquid stored in the processing tank and the processing liquid in the pipe. Thereby, as a result of supplying a large amount of electrons to the processing target, the positively charged processing target is neutralized.
- the treatment object is treated via the treatment liquid in the treatment tank or the treatment liquid in the pipe according to the principle described above. Can neutralize things.
- 4th aspect of this invention is the processing liquid processing method for immersing a process target object in the processing liquid stored by the processing tank, and processing, Comprising: In the processing liquid stored by the said processing tank A treatment object immersion step for immersing the treatment object, a treatment liquid discharge step for discharging treatment liquid from a discharge port toward the inside of the treatment tank, and the treatment liquid discharge step in parallel with the treatment object immersion step.
- the X-ray irradiation step of irradiating the processing liquid existing inside the pipe communicating with the discharge port with X-rays is stored in the discharge port and the processing tank in the processing liquid discharge step.
- This is a processing liquid processing method in which the processing liquid is connected to the liquid surface of the processing liquid.
- X-rays are irradiated to the processing liquid existing in the pipe. Further, the processing liquid discharged from the discharge port communicating with the inside of the pipe is supplied to the processing object. In the portion of the treatment liquid that is irradiated with X-rays, electrons are emitted from the water molecules by excitation of the water molecules, and as a result, a plasma state in which positive ions and electrons of the water molecules are mixed is formed.
- the processing liquid discharged from the discharge port is connected in liquid form with the liquid surface of the processing liquid.
- the processing object and the irradiated portion of the processing liquid are connected via the processing liquid.
- the treatment object can be treated with the treatment liquid while preventing or removing the charge of the treatment object.
- FIG. 2 is a schematic longitudinal sectional view of the integrated head shown in FIG. 1. It is a block diagram which shows the electric constitution of the substrate processing apparatus shown in FIG. It is process drawing which shows the process example performed in the substrate processing apparatus shown in FIG. It is an illustration sectional view showing the irradiation state of soft X-rays in the water nozzle. It is a figure which shows the state which has performed the rinse process to the board
- substrate. 6 is a flowchart for explaining a modification of the processing example shown in FIG. 4. It is a figure which shows typically the structure of the integrated head which concerns on 2nd Embodiment of this invention.
- FIG. 9 is a cross-sectional view taken along section line IX-IX in FIG. It is a figure for demonstrating the structure of the integrated head which concerns on 3rd Embodiment of this invention. It is a figure which shows the structure of the substrate processing apparatus which concerns on 4th Embodiment of this invention. It is a figure which shows the structure of the substrate processing apparatus which concerns on 5th Embodiment of this invention. It is a figure explaining discharge of the processing liquid in a 5th embodiment of the present invention. It is a figure which shows the structure of the substrate processing apparatus which concerns on 6th Embodiment of this invention. It is a figure which shows the structure of the substrate processing apparatus which concerns on 7th Embodiment of this invention.
- FIG. 18 it is a figure which shows the flow of DIW at the time of a rinse process. It is a figure which shows the structure of the substrate processing apparatus which concerns on 11th Embodiment of this invention. It is a figure which shows the state which the water supply unit shown in FIG. 20 is supplying DIW to the inclination part of the cup upper part.
- FIG. 25 is a cross-sectional view showing a state in which the soft X-ray irradiation apparatus shown in FIG.
- FIG. 32 is a schematic longitudinal sectional view of the soft X-ray irradiation head shown in FIG. 31.
- FIG. 32 is a plan view showing movement of the soft X-ray irradiation head shown in FIG. 31.
- FIG. 32 is a block diagram showing an electrical configuration of the substrate processing apparatus shown in FIG. 31.
- FIG. 32 is a process diagram showing an example of processing executed in the substrate processing apparatus shown in FIG. 31. It is an illustration figure for demonstrating a rinse process. It is an illustration figure which shows the state of the surface vicinity of the board
- FIG. 45 is a schematic cross-sectional view illustrating a configuration of a branch pipe and a soft X-ray irradiation unit illustrated in FIG. 44.
- FIG. 45 is a process diagram illustrating an example of a substrate process performed in the substrate processing apparatus illustrated in FIG. 44. It is an illustration figure which shows the irradiation state of the soft X-ray to the branch piping shown in FIG. It is a figure which shows the structure of the substrate processing apparatus with which the processing liquid processing apparatus which concerns on 20th Embodiment of this invention was applied.
- FIG. 1 is a diagram showing a configuration of a substrate processing apparatus 1 according to the first embodiment of the present invention.
- the substrate processing apparatus 1 is a single wafer used for processing a surface (processing target surface) of a circular semiconductor wafer (silicon wafer) as an example of a substrate (processing target) W with a processing solution (chemical solution and water). Device.
- a processing solution chemical solution and water
- water is used for rinsing the substrate W performed after the chemical treatment.
- the substrate processing apparatus 1 includes a spin chuck (substrate holding rotating means) 4 for rotating the substrate W in a horizontal posture in a processing chamber 3 partitioned by a partition wall (not shown), and an upper surface (upper side) of the substrate W.
- Water supply unit treatment liquid supply
- DIW deionized water
- a chemical nozzle 7 for supplying a chemical to the upper surface of the substrate W held by the spin chuck 4.
- the spin chuck 4 includes a spin motor 8, a spin shaft 9 integrated with a drive shaft of the spin motor 8, and a disk-shaped spin base attached substantially horizontally to the upper end of the spin shaft 9. 10 and a plurality of clamping members 11 provided at a plurality of positions on the peripheral edge of the spin base 10 at substantially equal intervals.
- the spin chuck 4 rotates the spin base 10 by the rotational driving force of the spin motor 8 in a state where the substrate W is sandwiched by the plurality of sandwiching members 11 so that the substrate W is placed in a substantially horizontal posture. In this state, it can be rotated around the vertical rotation axis C together with the spin base 10.
- the spin chuck 4 is not limited to a sandwiching type, and for example, by vacuum-sucking the back surface of the substrate W, the substrate W is held in a horizontal posture and further rotated around a vertical rotation axis in that state.
- a vacuum chucking type vacuum chuck
- a vacuum chuck that can rotate the held substrate W may be employed.
- the spin chuck 4 is accommodated in a cup (liquid receiving member) 17.
- the cup 17 includes a cup lower part 18 and a cup upper part 19 provided so as to be movable up and down above the cup lower part 18.
- the cup lower part 18 has a bottomed cylindrical shape whose center axis coincides with the rotation axis C.
- An exhaust port (not shown) is formed on the bottom surface of the cup lower portion 18, and the atmosphere in the cup 17 is always exhausted from the exhaust port while the substrate processing apparatus 1 is in operation.
- the cup upper portion 19 includes a cylindrical cylindrical portion 20 having a central axis common to the cup lower portion 18, and an inclined portion 21 that is inclined so as to increase from the upper end of the cylindrical portion 20 toward the central axis of the cylindrical portion 20. Integrated.
- a cup elevating unit 22 for moving the cup upper portion 19 up and down (moving up and down) is coupled to the cup upper portion 19. By the cup lifting / lowering unit 22, the cup upper portion 19 is moved to a position where the cylindrical portion 20 is disposed on the side of the spin base 10 and a position where the upper end of the inclined portion 21 is disposed below the spin base 10.
- the cup upper portion 19 and the cup lower portion 18 are each formed using a resin material (for example, PTFE (polytetrafluoroethylene)).
- a resin material for example, PTFE (polytetrafluoroethylene)
- the chemical nozzle 7 is, for example, a straight nozzle that discharges chemical liquid in a continuous flow state, and is fixedly disposed above the spin chuck 4 with its discharge port directed toward the rotation center of the substrate W.
- a chemical liquid supply pipe 15 to which a chemical liquid from a chemical liquid supply source is supplied is connected to the chemical liquid nozzle 7.
- a chemical solution valve 16 for switching supply / stop of supply of the chemical solution from the chemical solution nozzle 7 is interposed in the middle portion of the chemical solution supply pipe 15.
- the chemical nozzle 7 does not need to be fixedly arranged with respect to the spin chuck 4.
- the chemical nozzle 7 is attached to an arm that can swing in a horizontal plane above the cup 17, and the substrate is moved by the swing of the arm.
- a so-called scan nozzle configuration in which the position where the chemical liquid is deposited on the surface of W is scanned may be employed.
- a liquid according to the content of the treatment for the surface of the substrate W is used.
- APM ammonia-hydrogen peroxide mixture
- TMAH tetramethylammonium hydroxide aqueous solution
- SPM sulfuric acid / A resist stripping solution and a polymer removing solution such as hydrogen peroxide mixture (sulfuric acid / hydrogen peroxide mixture) and APM (ammonia-hydrogen peroxide mixture) are used.
- Cleaning treatment to remove metal contaminants includes hydrofluoric acid, HPM (hydrochloric acid / hydrogen peroxide mixture) and SPM (sulfuric acid / hydrogen peroxide mixture). Is used.
- the water supply unit 100 has an integrated head 6 disposed so as to face the upper side of the spin chuck 4.
- the integrated head 6 includes a water nozzle (treatment liquid nozzle) 61 for discharging DIW as an example of water, and a soft X-ray irradiation unit (for irradiating soft X-rays to water flowing through the water nozzle 61).
- X-ray irradiation means) 62 is integrally provided.
- the soft X-ray irradiation unit 62 is attached to the water nozzle 61.
- the water nozzle 61 is, for example, a straight nozzle that discharges a chemical solution in a continuous flow state, and is disposed with its discharge port 53 facing downward.
- the water nozzle 61 is connected to a water supply pipe 13 to which DIW from a DIW supply source is supplied.
- a water valve 14 for switching supply / stop of supply of DIW from the water nozzle 61 is interposed in the middle of the water supply pipe 13.
- the soft X-ray irradiation unit 62 will be described later.
- FIG. 2 is a schematic longitudinal sectional view of the integrated head 6.
- the water nozzle 61 of the integrated head 6 has a first nozzle pipe 51 having a round tubular shape (cylindrical shape) extending in the vertical direction.
- the first nozzle pipe 51 is formed using, for example, a resin material such as polyvinyl-chloride, PTFE (polytetrafluoroethylene), or PFA (perfluoro-alkylvinyl-ether-tetrafluoro-ethlene-copolymer). ing.
- a round discharge port 53 is opened at the front end (lower end) of the first nozzle pipe 51.
- a circular first opening 52 is formed in the middle pipe wall.
- a soft X-ray irradiation unit 62 is attached to the first nozzle pipe 51 so as to close the first opening 52.
- the integrated head 6 is fixedly disposed above the rotation axis C of the substrate W by the spin chuck 4 with its discharge port 53 directed downward (near the rotation center of the substrate W).
- An annular electrode 56 is fitted and fixed to the tip of the first nozzle pipe 51.
- a voltage with respect to the apparatus ground is applied to the electrode 56 by a power source 57 (see FIG. 3), whereby an electric field is applied to the processing liquid passing near the electrode 56.
- the soft X-ray irradiation unit 62 includes a soft X-ray generator (X-ray generator) 25, a cover 26 made of, for example, polyvinyl-chloride covering the periphery of the soft X-ray generator 25, A gas nozzle (gas supply means) 27 for supplying a gas to the inside of the cover 26 is provided, and soft X-rays are irradiated sideways.
- the cover 26 has a horizontally long rectangular box shape surrounding the soft X-ray generator 25 with a space from the soft X-ray generator 25.
- a circular second opening 28 having the same diameter as the first opening 52 is formed in a portion facing the irradiation window 35 described next.
- the soft X-ray irradiation unit 62 includes a nozzle pipe so that the second opening 28 of the cover 26 coincides with the first opening 52 of the first nozzle pipe 51 and the lateral wall 26A is in close contact with the outer periphery of the first nozzle pipe 51. 51 is attached.
- the second opening 28 is closed by a disk-shaped window member 71.
- the window member 71 closes the second opening 28 from the inside of the cover 26.
- the window member 71 closes not only the second opening 28 but also the first opening 52.
- a substance having a small atomic weight is used so that soft X-rays having a low penetrating power are easily transmitted.
- beryllium (Be) is adopted as the material of the window member 71.
- the thickness of the window member 71 is set to about 0.3 mm, for example.
- the soft X-ray generator 25 emits (radiates) soft X-rays used to ionize the processing liquid passing through the first nozzle pipe 51.
- the soft X-ray generator 25 includes a case body 29, a soft X-ray tube 30 that is long to generate soft X-rays, and a high voltage unit 31 that supplies a high voltage to the soft X-ray tube 30. Yes.
- the case body 29 is in the shape of a horizontally long rectangular tube that accommodates the soft X-ray tube 30 and the high voltage unit 31, and is made of a material having conductivity and heat conductivity (for example, a metal material such as aluminum). It is formed using.
- the high voltage unit 31 inputs a drive voltage having a high potential of ⁇ 9.5 kV, for example, to the soft X-ray tube 30.
- the high voltage unit 31 is supplied with a voltage from a power source (not shown) through a feed line 43 drawn out of the cover 26 through a through hole 42 formed in the cover 26.
- the soft X-ray tube 30 is made of a glass or metal cylindrical vacuum tube, and is arranged so that the tube direction is horizontal. One end (opening end, left end shown in FIG. 2) of the soft X-ray tube 30 forms a circular opening 41. The other end of the soft X-ray tube 30 (the right end shown in FIG. 2) is closed and serves as a stem 32.
- a filament 33 serving as a cathode and a target 36 serving as an anode are disposed so as to face each other.
- the soft X-ray tube 30 houses a filament 33 and a focus 34. Specifically, a filament 33 as a cathode is disposed on the stem 32.
- the filament 33 is electrically connected to the high voltage unit 31.
- the filament 33 is surrounded by a cylindrical focus 34.
- the open end of the soft X-ray tube 30 is closed by a plate-shaped irradiation window 35 having a vertical posture.
- the irradiation window 35 has a disk shape, for example, and is fixed to the wall surface of the open end of the soft X-ray tube 30 by silver brazing.
- As the material of the irradiation window 35 a substance having a small atomic weight is used so that soft X-rays having a low transmission power can be easily transmitted. For example, beryllium (Be) is adopted.
- the thickness of the irradiation window 35 is set to about 0.3 mm, for example.
- the irradiation window 35 faces the inner surface 71 ⁇ / b> A of the window member 71 and is arranged at a minute distance from the window member 71.
- a metal target 36 is formed on the inner surface 35A of the irradiation window 35 by vapor deposition.
- a metal having a high atomic weight and a high melting point such as tungsten (W) or tantalum (Ta) is used.
- the filament 33 When the drive voltage from the high voltage unit 31 is applied to the filament 33 which is a cathode, the filament 33 emits electrons. The electrons emitted from the filament 33 are converged by the focus 34 to become an electron beam and collide with the target 36 to generate soft X-rays. The generated soft X-rays are emitted (radiated) from the irradiation window 35 in the lateral direction (leftward in FIG. 2), and irradiate the inside of the first nozzle pipe 51 through the window member 71 and the first opening 52.
- the soft X-ray irradiation angle (irradiation range) from the irradiation window 35 is a wide angle (for example, 130 °) as shown in FIG. Soft X-rays irradiated from the irradiation window 35 into the first nozzle pipe 51 have a wavelength of, for example, 0.13 to 0.4 nm.
- the entire outer surface of the window member 71 (the wall surface on the side where the treatment liquid flows in the closed window) 71B is covered with a hydrophilic film (film) 38.
- the hydrophilic film 38 is, for example, a polyimide resin film.
- the reason why the outer surface 71B of the window member 71 is covered with the hydrophilic film 38 is to protect the window member 71 made of beryllium having poor acid resistance from an acid contained in a treatment liquid such as water.
- the film thickness of the hydrophilic film 38 is 50 ⁇ m or less, and preferably about 10 ⁇ m. Since the hydrophilic film 38 has hydrophilicity, it is possible to suppress or prevent air bubbles from being mixed between the film 38 and DIW. Thereby, the soft X-rays from the irradiation window 35 can be favorably irradiated to the DIW flowing through the first nozzle pipe 51.
- the discharge port of the gas nozzle 27 opens in the horizontal wall of the cover 26.
- Gas from a gas supply source (not shown) is supplied to the gas nozzle 27 via a gas valve (gas supply means) 37.
- the gas discharged from the gas nozzle 27 include CDA (clean air with low humidity) and inert gas such as nitrogen gas.
- the gas discharged from the gas nozzle 27 is supplied into the cover 26.
- the soft X-ray generator 25 generates heat by driving the soft X-ray generator 25.
- the soft X-ray generator 25 is cooled to generate soft X-rays. The temperature rise in the ambient atmosphere of the vessel 25 can be suppressed.
- FIG. 3 is a block diagram showing an electrical configuration of the substrate processing apparatus 1.
- the substrate processing apparatus 1 further includes a control device (X-ray irradiation control means) 40 having a configuration including a microcomputer.
- the control device 40 is connected with a cup lifting unit 22, a spin motor 8, a high voltage unit 31, a chemical liquid valve 16, a water valve 14, a power source 57, a gas valve 37, and the like as control targets.
- gas valve 37 is always open while the substrate processing apparatus 1 is powered on in order to release the heat in the cover 26.
- FIG. 4 is a process diagram showing a processing example of the substrate W executed in the substrate processing apparatus 1.
- the rinse process is performed after the chemical process.
- the processing of the substrate W in the substrate processing apparatus 1 will be described with reference to FIGS. 1, 3, and 4.
- an unprocessed substrate W is carried into the processing chamber 3 by a transfer robot (not shown) (step S1), and is transferred to the spin chuck 4 with its surface facing upward.
- the control device 40 controls the spin motor 8 to start the rotation of the substrate W by the spin chuck 4 (step S2).
- the rotation speed of the substrate W is increased to a predetermined liquid processing speed (for example, 500 rpm), and then maintained at the liquid processing speed.
- the control device 40 opens the chemical liquid valve 16 and discharges the chemical liquid from the chemical liquid nozzle 7 toward the rotation center of the upper surface of the substrate W.
- the chemical solution supplied to the upper surface of the substrate upper surface W receives centrifugal force due to the rotation of the substrate W and flows toward the periphery of the substrate W (spreads over the entire area of the substrate W). Thereby, the process by a chemical
- control device 40 closes the chemical solution valve 16 and stops the supply of the chemical solution from the chemical solution nozzle 7.
- control device 40 opens the water valve 14 and discharges DIW from the water nozzle 61 of the integrated head 6 toward the rotation center of the upper surface of the substrate W in a rotating state (step S4).
- the soft X-ray irradiation timing comes.
- the predetermined time is provided so that soft X-ray irradiation is started after DIW is sufficiently filled in the first nozzle pipe 51.
- the control device 40 controls the high voltage unit 31 to generate soft X-rays in the soft X-ray generator 25 of the soft X-ray irradiation unit 62 and irradiates the soft X-rays. Irradiation from the window 35 to the inside of the first nozzle pipe 51 through the window member 71 (step S5). Thereby, soft X-rays are irradiated to DIW which distribute
- FIG. 5 is a schematic cross-sectional view showing a state of soft X-ray irradiation into the water nozzle 61.
- the soft X-rays are irradiated to the DIW flowing through the first nozzle pipe 51 of the water nozzle 61. Further, the processing liquid discharged from the discharge port 53 is supplied to the upper surface of the substrate W.
- the part irradiated with soft X-rays (the part facing the first opening 52 in the first nozzle pipe 51. The shaded part shown in FIG. 5. 54 "), electrons are emitted from the water molecules by excitation of the water molecules. As a result, a plasma state in which a large amount of electrons and a large amount of positive ions of water molecules are mixed is formed in the irradiated portion 54 of DIW.
- FIG. 6 is a diagram showing a state where the substrate W is rinsed.
- the DIW supplied to the upper surface of the substrate W receives centrifugal force due to the rotation of the substrate W and flows toward the peripheral edge of the substrate W (spreads over the entire area of the substrate W).
- a DIW liquid film 63 in contact with the upper surface is formed over the entire upper surface of the substrate W.
- the chemical solution adhering to the upper surface of the substrate W is washed away by the liquid film 63 of DIW.
- the DIW supply flow rate to the water nozzle 61 is set to a relatively large flow rate (for example, 0.5 to 2.0 L / min). Therefore, the form of DIW discharged from the discharge port 53 of the water nozzle 61 forms a continuous flow connected to both the discharge port 53 and the DIW liquid film 63 on the upper surface of the substrate W, and the first nozzle In the pipe 51, DIW is in a liquid-tight state. At this time, the DIW liquid film 63 and the DIW irradiated portion 54 are connected via the DIW.
- the substrate W can be subjected to the rinsing process while preventing or eliminating the charge of the substrate W.
- liquid property of DIW does not change by irradiation with soft X-rays, unlike the case where the substrate W is processed using an acidic processing solution such as carbonated water, there is no possibility of adversely affecting the devices on the substrate W. .
- the electrode 56 of the power source 57 is applied to the electrode 56 of the power source 57.
- the electrode 56 is preferably charged to a positive charge.
- the electrons generated in the DIW irradiated portion 54 due to the soft X-ray irradiation due to the positive charge of the electrode 56 are pulled toward the electrode 56, and the first nozzle pipe 51 (water nozzle 61) with the electrode 56 is provided. It moves to the tip. That is, a large amount of electrons can be pulled toward the discharge port 53 of the water nozzle 61. Thereby, the movement of the electrons to the substrate W side can be promoted.
- the control device 40 closes the water valve 14 to stop supplying DIW (step S6), and the high voltage
- the unit 31 is controlled to stop the soft X-ray irradiation from the irradiation window 35 of the soft X-ray irradiation unit 62 (step S7).
- the control device 40 also stops the application of the electric field to the electrode 56 in conjunction with the stop of the soft X-ray irradiation from the soft X-ray irradiation unit 62.
- control device 40 controls the spin motor 8 to increase the rotation speed of the substrate W to a spin dry rotation speed (for example, 2500 rpm).
- a spin dry rotation speed for example, 2500 rpm.
- step S9 When the spin drying is performed for a predetermined drying time, the rotation of the spin chuck 4 is stopped. Thereafter, the processed substrate W is unloaded from the processing chamber 3 by a transfer robot (not shown) (step S9).
- soft X-rays are irradiated to the DIW flowing through the first nozzle pipe 51 of the water nozzle 61.
- a plasma state in which a large amount of electrons and a large amount of positive ions of water molecules are mixed is formed in the irradiated portion 54 of DIW.
- These electrons travel along the continuous flow DIW and move to the DIW liquid film 63, and as a result, the DIW liquid film 63 has a large amount of electrons.
- charging of the substrate W due to contact separation with DIW does not occur. Therefore, charging of the substrate W during the rinsing process can be prevented.
- the charge on the substrate W can be removed (that is, static elimination). As a result, device destruction due to charging of the substrate W can be prevented.
- liquid property of DIW does not change by irradiation with soft X-rays, unlike the case where the substrate W is processed using an acidic processing solution such as carbonated water, there is no possibility of adversely affecting the devices on the substrate W. .
- FIG. 7 is a flowchart for explaining a modification of the processing example shown in FIG.
- the water supply unit 100 detects the presence / absence of DIW in the first nozzle pipe 51 at the predetermined water detection position 102 in the first nozzle pipe 51 of the water nozzle 61.
- a liquid detection sensor (processing liquid detection means) 101 is disposed.
- the water detection position 102 is set to the same position as the first opening (opening, soft X-ray irradiation position) 52 (see FIG. 2) or a position close to the first opening 52 with respect to the flow direction of the first nozzle pipe 51. ing.
- the liquid detection sensor 101 is constituted by, for example, a capacitance type sensor, and is directly attached to or arranged close to the outer peripheral wall (not shown) of the first nozzle pipe 51.
- the liquid detection sensor 101 detects the presence or absence of DIW in the first nozzle pipe 51 around the water detection position 102 and outputs a signal corresponding to the detection result.
- DIW is present near the first opening 52 of the first nozzle pipe 51
- DIW is detected.
- DIW is not present near the first opening 52 of the first nozzle pipe 51
- DIW is not detected. .
- liquid detection sensor 101 an optical sensor (for example, a combination of a light emitting diode and a light receiving element and using a difference in refractive index between gas and liquid) or a conductivity sensor may be employed.
- an optical sensor for example, a combination of a light emitting diode and a light receiving element and using a difference in refractive index between gas and liquid
- a conductivity sensor may be employed.
- the control device 40 refers to the detection output of the liquid detection sensor 101 to determine whether there is DIW near the first opening 52 (with liquid). Whether or not there is liquid is checked (step S12). If there is DIW near the first opening 52 (YES in step S12), the control device 40 starts X-ray irradiation by the soft X-ray irradiation unit 62 (step S13).
- the liquid detection sensor 101 is also used in water supply units 230, 250, and 600 (see FIGS. 15A, 15B, 16, and 28) in which the same configuration as the water supply unit 100 is adopted. Is possible. In this case, the process shown in FIG. 7 can be executed.
- FIG. 8 is a diagram schematically showing the configuration of an integrated head 6A according to the second embodiment of the present invention.
- FIG. 9 is a cross-sectional view taken along section line IX-IX in FIG.
- the integrated head 6A parts common to the integrated head 6 according to the first embodiment are denoted by the same reference numerals as in FIGS. 1 to 6, and description thereof is omitted.
- the main point that the integrated head 6A differs from the integrated head 6 is that a first nozzle pipe 51A having a flat tip is used for the water nozzle 61. Similar to the first nozzle pipe 51, the first nozzle pipe 51 ⁇ / b> A in the region excluding the tip has a round tubular shape (cylindrical shape).
- the first nozzle pipe 51A extends in the vertical direction, and also includes polyvinyl-chloride, PTFE (polytetrafluorofluoroethylene), PFA (perfluoro-alkylvinyl-ether-tetrafluoro). -ethlene-copolymer) and the like.
- a flat portion 151 having a substantially rectangular cross section is formed at the tip of the first nozzle pipe 51A.
- the flat portion 151 is obtained by deforming a round tube by thermoforming.
- a width W1 between the pair of flat wall portions 152 and 153 is set to about 5 to 10 mm, for example.
- a circular third opening (opening, X-ray irradiation position) 52A is formed in the middle of the first nozzle pipe 51A.
- a soft X-ray irradiation unit 62 is attached to the first nozzle pipe 51A so as to close the third opening 52A.
- the second opening 28 of the cover 26A coincides with the third opening 52A of the first nozzle pipe 51A, and the lateral wall 26A is in close contact with the outer periphery of the first nozzle pipe 51A. Thus, it is attached to the first nozzle pipe 51A.
- the width W1 of the flat portion 151 is such that soft X-rays irradiated from the irradiation window 35 of the soft X-ray irradiation unit 62 reach the other flat wall portion 153 in a state where the flat portion 151 is filled with DIW.
- the width is set. Therefore, the soft X-rays from the soft X-ray irradiation unit 62 are irradiated to all the DIWs that flow through the flat portion 151 of the first nozzle pipe 51A.
- the irradiation part 54 of DIW can be maintained in a wide range, the amount of electrons contained in the DIW liquid film 63 on the upper surface of the substrate W can be further increased. As a result, the occurrence of charging of the substrate W due to contact separation with DIW can be more reliably suppressed, and even if the substrate W is charged before the rinsing process, the substrate W can be more reliably discharged.
- FIG. 10 (a) and 10 (b) are diagrams for explaining the configuration of an integrated head 6B according to a third embodiment of the present invention.
- FIG. 10A is a cross-sectional view of the main part of the integrated head 6B during the rinsing process
- FIG. 10B is a view of FIG. 10A viewed from below.
- a fiber bundle (fibrous substance) 65 configured by bundling a large number of string-like fibers is attached to the discharge port 53 of the first nozzle pipe 51 of the water nozzle 61.
- the fiber bundle 65 has a cylindrical shape having a central axis along the longitudinal direction of the first nozzle pipe 51.
- the protruding length of the fiber bundle 65 from the discharge port 53 of the first nozzle pipe 51 is set to be approximately the same as the interval between the substrate W held by the spin chuck 4 and the discharge port 53.
- DIW discharged from the discharge port 53 of the first nozzle pipe 51 flows downward along a large number of fibers included in the fiber bundle 65.
- the tip of the fiber bundle 65 is in contact with the DIW liquid film 63 formed on the upper surface of the substrate W, and floats in the liquid film 63. Since the fiber bundle 65 leads the DIW well from the discharge port 53 to the DIW liquid film 63, the DIW mode discharged from the discharge port 53 is a continuous flow that connects both the discharge port 53 and the DIW liquid film 63. Easy to maintain.
- the mode of DIW discharged from the discharge port 53 can be maintained in the above-described continuous flow state. Accordingly, it is possible to prevent the substrate W from being charged and to remove the charge from the substrate W while reducing the consumption of DIW.
- the tip of the fiber bundle 65 may be in contact with the upper surface of the substrate W in addition to the liquid film 63 during the rinsing process.
- the fiber bundle 65 at the tip of the first nozzle pipe 51A (see FIG. 8). Further, in the water supply units 230, 250, and 600 (see FIGS. 15A, 15B, 16 and 28) in which the same configuration as the water supply unit 100 is adopted, the tip of the first nozzle pipe 51 is used. It is also possible to provide a fiber bundle 65 in the part.
- the fibrous substance attached to the discharge port 53 of the first nozzle pipe 51 of the water nozzle 61 the fiber bundle 65 configured by bundling a large number of string-like fibers has been described as an example.
- the fibrous substance is not limited to a structure in which a large number of string-like fibers are bundled.
- the fibrous substance may be constituted by a single thick string-like fiber, or a cloth-like material instead of a string-like material. You may be comprised with the fiber.
- FIG. 11 is a diagram showing a configuration of a substrate processing apparatus 201 according to the fourth embodiment of the present invention.
- a water supply unit 200 in which a nozzle and a soft X-ray irradiation unit are separately provided is provided. Is provided.
- the water supply unit 200 exists in the water nozzle 202, a water supply pipe (treatment liquid pipe) 204 that supplies DIW (an example of water) from the DIW supply source to the water nozzle 202, and the water supply pipe 204.
- a soft X-ray irradiation unit (X-ray irradiation means) 203 for irradiating the DIW with soft X-rays.
- the soft X-ray irradiation unit 203 is attached to the water supply pipe 204.
- the water nozzle 202 has a round tubular (cylindrical) nozzle pipe, and is attached to the tip of the water supply pipe 204.
- the water nozzle 202 is configured by a straight nozzle that discharges liquid in a continuous flow state, and the water nozzle 202 is fixedly disposed in the processing chamber 3 with the discharge port 202A directed toward the center of the upper surface of the substrate W. ing.
- the water nozzle 202 has the same configuration as the water nozzle 61 (see FIG. 2) of the first embodiment except that the first opening 52 (see FIG. 2) is not formed. That is, an annular electrode 56 is fitted and fixed to the tip of the nozzle pipe of the water nozzle 202, and a voltage with respect to the apparatus ground is applied to the electrode 56 by a power source 57 (see FIG. 3). It has become.
- the water supply pipe 204 has a round tubular shape (cylindrical shape).
- the water supply pipe 204 is formed using a resin material such as polyvinyl-chloride, PTFE (polytetrafluoroethylene), or PFA (perfluoro-alkylvinyl-ether-tetrafluoro-ethlene-copolymer).
- a resin material such as polyvinyl-chloride, PTFE (polytetrafluoroethylene), or PFA (perfluoro-alkylvinyl-ether-tetrafluoro-ethlene-copolymer).
- An opening (not shown) is formed in the tube wall in the middle of the water supply pipe 204.
- the soft X-ray irradiation unit 203 adopts the same configuration as the soft X-ray irradiation unit 62 (see FIG. 2) according to the first embodiment.
- the soft X-ray irradiation unit 203 is attached to the water supply pipe 204 so as to close the opening of the water supply pipe 204.
- the opening of the cover of the soft X-ray irradiation unit 203 (the opening corresponding to the second opening 28 (see FIG. 2) of the cover 26 of the soft X-ray irradiation unit 62) is the opening of the water supply pipe 204.
- the wall surface of the cover of the soft X-ray irradiation unit 203 (corresponding to the lateral wall 26A (see FIG.
- the high voltage unit of the soft X-ray irradiation unit 203 (corresponding to the high voltage unit 31 (see FIG. 2) of the soft X-ray irradiation unit 62 according to the first embodiment) is connected to the control device 40 (see FIG. 3). Yes.
- the water supply pipe 204 is provided with a water valve 205 for opening and closing the water supply pipe 204.
- a water valve 205 for opening and closing the water supply pipe 204.
- DIW is supplied from the water supply pipe 204 to the water nozzle 202, and when the water valve 205 is closed, the supply of DIW from the water supply pipe 204 to the water nozzle 202 is stopped.
- the water valve 205 is connected to the control device 40 (see FIG. 3).
- the control device 40 opens the water valve 205. Thereby, DIW flowing through the water supply pipe 204 is supplied to the water nozzle 202. DIW is discharged from the discharge port 202A of the water nozzle 202 toward the rotation center of the upper surface of the substrate W in a rotating state.
- the control device 40 controls the high voltage unit of the soft X-ray irradiation unit 203 so that the soft X-ray irradiation unit 203 has a soft X-ray irradiation timing.
- a soft X-ray is generated in a X-ray generator (corresponding to the soft X-ray generator 25 (see FIG. 2) of the soft X-ray irradiation unit 62 according to the first embodiment), and the soft X-ray is supplied to the water supply pipe 204. Irradiate the inside. Thereby, soft X-rays are irradiated to DIW which distribute
- the DIW supplied to the upper surface of the substrate W receives a centrifugal force due to the rotation of the substrate W and flows toward the periphery of the substrate W (spreads over the entire area of the substrate W). As a result, a DIW liquid film is formed over the entire upper surface of the substrate W. The chemical liquid adhering to the upper surface of the substrate W is washed away by the liquid film of DIW.
- the DIW supply flow rate to the water nozzle 202 is set to a relatively large flow rate (for example, 0.5 to 2.0 L / min). Therefore, the mode of DIW discharged from the discharge port 202A of the water nozzle 202 is a continuous flow mode connected to both the discharge port 202A and the DIW liquid film on the upper surface of the substrate W. Further, DIW is in a liquid-tight state in the nozzle pipe of the water nozzle 202 and the water supply pipe 204.
- the DIW irradiated portion in the water supply pipe 204 (shown in FIG. 5 of the DIW according to the first embodiment) In a portion equivalent to the irradiated portion 54), electrons are emitted from the water molecules by excitation of the water molecules. As a result, a plasma state in which a large amount of electrons and a large amount of positive ions of water molecules are mixed is formed in the DIW irradiated portion in the water supply pipe 204.
- the DIW irradiated portion is connected to the DIW liquid film formed on the upper surface of the substrate W via the DIW.
- FIG. 12 is a diagram showing a configuration of a substrate processing apparatus 211 according to the fifth embodiment of the present invention.
- Parts common to the substrate processing apparatus 201 according to the fourth embodiment are denoted by the same reference numerals as those in FIG.
- the difference between the substrate processing apparatus 211 and the substrate processing apparatus 201 is that a water nozzle 212 having a plurality of discharge ports 216 is provided instead of the water nozzle 202 (see FIG. 11).
- the water nozzle 212 includes a main body 213 formed of a round tubular (cylindrical) nozzle pipe, and a plurality of (for example, three in FIG. 12) discharge port portions arranged in the horizontal direction at the tip of the main body 213. 215 and a communication part 214 that communicates the internal space of the main body part 213 and the internal space of each discharge port part 215. Each discharge port portion 215 has a discharge port 216. Each discharge port portion 215 is configured by a straight nozzle that discharges liquid in a continuous flow state. An electrode 56 is fitted and fixed to each discharge port portion 215. The water nozzle 212 is fixedly disposed in the processing chamber 3 with the plurality of discharge ports 216 directed toward the center of the upper surface of the substrate W. A water supply pipe 204 is connected to the main body 213 of the water nozzle 212.
- DIW an example of water
- DIW is supplied to the water nozzle 212, and DIW is discharged from each discharge port 216 of the water nozzle 212.
- a DIW liquid film is formed over the entire upper surface of the substrate W.
- the DIW mode discharged from the individual discharge ports 216 is a continuous flow that leads to both the discharge port 216 and the DIW liquid film on the upper surface of the substrate W.
- the aspect is made. Further, DIW is in a liquid-tight state in the nozzle pipe of the water nozzle 212 and the water supply pipe 204.
- the substrate processing apparatus 211 if the aspect of DIW discharged from at least one discharge port 216 has a continuous flow shape connected to both the discharge port 216 and the DIW liquid film on the upper surface of the substrate W. Good.
- the nozzle pipe of the water nozzle 212 and the DIW liquid film on the upper surface of the substrate W need only be connected by at least one continuous flow 64A (see FIG. 13).
- one discharge port 216A has a continuous flow shape connected to both the discharge port 216 and the DIW liquid film on the upper surface of the substrate W.
- the other discharge ports 216B and 216C do not form a continuous flow.
- DIW is ejected in the form of droplets from the ejection port 216B and the ejection port 216C, or DIW is not ejected.
- the nozzle pipe of the water nozzle 212 and the DIW liquid film on the upper surface of the substrate W are connected by at least one continuous flow 64A. Therefore, when the substrate W is positively charged, electrons from the DIW irradiated portion in the water supply pipe 204 move along the single continuous flow 64A toward the DIW liquid film 63 on the upper surface of the substrate W. To do. As a result, it is possible to prevent the substrate W from being charged and to neutralize the substrate W.
- FIG. 14 is a diagram showing a configuration of a substrate processing apparatus 221 according to the sixth embodiment of the present invention.
- a water supply unit (processing liquid supply apparatus) 220 is provided instead of the water supply unit 200.
- the water supply unit 220 includes a water nozzle 202, a water supply pipe 204, a first branch pipe (branch pipe) 222 that branches from the middle of the water supply pipe 204, and a DIW present in the first branch pipe 222.
- the soft X-ray irradiation unit 223 is attached to the first branch pipe 222. That is, in the water supply unit 220, the soft X-ray irradiation unit 223 is attached to the first branch pipe 222 instead of the water supply pipe 204.
- the first branch pipe 222 branches from the upstream side of the water valve 205 in the water supply pipe 204.
- the first branch pipe 222 is a round tube (cylindrical), such as poly-vinyl-chloride, PTFE (poly-tetra-fluoro-ethylene), PFA (perfluoro-alkyl vinyl-ether-tetrafluoro-ethlene-copolymer), etc. These resin materials are used.
- a branch valve 225 for opening and closing the first branch pipe 222 is interposed in the middle of the first branch pipe 222.
- the branch valve 225 is connected to the control device 40 (see FIG. 3).
- an opening (not shown) is formed in a predetermined portion of the pipe wall upstream of the branch valve 225.
- a first cup nozzle 224 is attached to the downstream end of the first branch pipe 222.
- the first cup nozzle 224 is constituted by a straight nozzle that discharges liquid in a continuous flow state.
- the discharge port (liquid receiving discharge port) 224A is connected to the outer wall of the cup upper portion 19 (for example, the upper surface of the inclined portion 21). ) And is fixedly disposed above the cup upper portion 19 in the processing chamber 3.
- the soft X-ray irradiation unit 223 employs the same configuration as the soft X-ray irradiation unit 62 (see FIG. 2) according to the first embodiment.
- the soft X-ray irradiation unit 223 is attached to the first branch pipe 222 so as to close the opening of the first branch pipe 222.
- the opening of the cover of the soft X-ray irradiation unit 223 (corresponding to the second opening 28 (see FIG. 2) of the cover 26 of the soft X-ray irradiation unit 62) is aligned with the opening of the first branch pipe 222.
- the wall surface of the cover of the soft X-ray irradiation unit 223 (corresponding to the lateral wall 26A of the cover 26 of the soft X-ray irradiation unit 62 (see FIG. 2)) is in close contact with the outer periphery of the first branch pipe 222.
- the high voltage unit of the soft X-ray irradiation unit 223 (corresponding to the high voltage unit 31 (see FIG. 2) of the soft X-ray irradiation unit 62 according to the first embodiment) is connected to the control device 40 (see FIG. 3). Yes.
- the cup 17 since the cup upper part 19 is moved up and down by the cup elevating unit 22, the cup 17 (particularly the cup upper part 19) may be charged. For this reason, it is necessary to neutralize the cup upper portion 19 prior to executing the processing on the substrate W.
- the control device 40 controls the high voltage unit of the soft X-ray irradiation unit 223 to control the soft X-ray generator (the soft X-ray irradiation unit 62 according to the first embodiment) of the soft X-ray irradiation unit 223.
- the soft X-ray generator 25 (refer to FIG. 2) generates soft X-rays and irradiates the soft X-rays toward the inside of the first branch pipe 222. Thereby, soft X-rays are irradiated to DIW existing in the first branch pipe 222.
- control device 40 opens the branch valve 225 while closing the water valve 205. Accordingly, DIW flowing through the first branch pipe 222 is supplied to the first cup nozzle 224. DIW is discharged from the discharge port 224A of the first cup nozzle 224 toward the upper surface of the inclined portion 21 of the cup upper portion 19. The supplied DIW flows downward along the upper surface of the inclined portion 21. Therefore, a DIW liquid film is formed on the upper surface of the inclined portion 21. At this time, the supply flow rate of DIW to the first cup nozzle 224 is set to a relatively large flow rate (for example, 0.5 to 2.0 L / min).
- the DIW mode discharged from the discharge port 224A of the first cup nozzle 224 has a continuous flow mode connected to both the discharge port 224A and the DIW liquid film on the upper surface of the inclined portion 21. Further, DIW is in a liquid-tight state in the nozzle pipe of the first cup nozzle 224 and in the first branch pipe 222.
- the potential difference between the DIW irradiation portion in the first branch pipe 222 and the positively charged cup upper portion 19 causes the DIW in the first branch pipe 222 to be positive. Electrons from the irradiated portion move toward the DIW liquid film on the upper surface of the inclined portion 21 along the continuous flow DIW. As a result, the DIW liquid film on the upper surface of the inclined portion 21 has a large amount of electrons, so that the portion of the positively charged cup upper portion 19 that is in contact with the DIW liquid film is neutralized.
- the unprocessed substrate W is carried into the processing chamber 3 and delivered to the spin chuck 4.
- the control device 40 controls the spin motor 8 to start the rotation of the substrate W by the spin chuck 4 (step S2 in FIG. 4).
- the rotation speed of the substrate W is increased to a predetermined liquid processing speed (for example, 500 rpm), and then maintained at the liquid processing speed.
- control device 40 opens the water valve 205 while closing the branch valve 225.
- the control device 40 controls the high voltage unit of the soft X-ray irradiation unit 223 to control the soft X-ray irradiation unit 223.
- Soft X-rays are generated in the line generator, and the soft X-rays are irradiated toward the inside of the first branch pipe 222. Thereby, soft X-rays are irradiated to DIW which distribute
- DIW is discharged from the discharge port 202A of the water nozzle 202 toward the rotation center of the upper surface of the substrate W in a rotating state. During the rinsing process, a DIW liquid film is formed over the entire upper surface of the substrate W.
- the mode of DIW discharged from the discharge port 202A of the water nozzle 202 is a continuous flow mode connected to both the discharge port 202A and the DIW liquid film on the upper surface of the substrate W. Further, DIW is in a liquid-tight state in the nozzle pipe of the water nozzle 202, the water supply pipe 204, and the first branch pipe 222.
- the DIW irradiated portion in the first branch pipe 222 (according to the first embodiment shown in FIG. 5).
- the DIW irradiated portion 54 electrons are emitted from the water molecules by excitation of the water molecules.
- a plasma state in which a large amount of electrons and a large amount of positive ions of water molecules are mixed is formed in the DIW irradiated portion in the first branch pipe 222.
- the DIW irradiated portion is connected to the DIW liquid film formed on the upper surface of the substrate W via the DIW.
- the hydrophilic film (corresponding to the hydrophilic film 38 (see FIG. 2)) is peeled off from the outer surface of the window member of the X-ray irradiation unit 223 (corresponding to the outer surface 71B (see FIG. 2) of the window member 71), There is a risk that beryllium contained in the window member dissolves into a processing solution such as DIW. Even in such a case, since the X-ray irradiation unit 223 is provided in the first branch pipe 222, the DIW containing such beryllium is supplied to the first cup nozzle 224 instead of the water nozzle 202. The Thereby, it is possible to reliably prevent the DIW containing beryllium from being supplied to the substrate W.
- DIW an example of water
- 202 is used to remove static electricity from the second nozzle pipes (second pipes) 232 and 262 through which the processing liquid flows using DIW (an example of water).
- DIW an example of water
- 15 (a) and 15 (b) are diagrams showing the configuration of the substrate processing apparatus 231 according to the seventh embodiment of the present invention.
- the substrate processing apparatus 231 is different from the substrate processing apparatus 1 according to the first embodiment in that the substrate processing apparatus 231 includes a second nozzle pipe 232 for supplying a processing liquid to the substrate W held on the spin chuck 4.
- the point is that DIW as an example of water is supplied to the second nozzle pipe 232 by the water supply unit 230. Since the water supply unit 230 employs a configuration equivalent to that of the water supply unit 100 (see FIG. 1), the same reference numerals as those in the case of the water supply unit 100 are attached and description thereof is omitted. In FIGS. 15A and 15B, only the configuration related to the water supply unit 230 is described, and the other portions are not shown. FIG.
- FIG. 15A is a cross-sectional view showing a state in which the second nozzle pipe 232 is accommodated in the standby pod 237 described below
- FIG. 15B is a cross-sectional line B-- in FIG. It is sectional drawing seen from B.
- FIG. 15A is a cross-sectional view showing a state in which the second nozzle pipe 232 is accommodated in the standby pod 237 described below
- FIG. 15B is a cross-sectional line B-- in FIG. It is sectional drawing seen from B.
- the second nozzle pipe 232 is integrally provided with a cylindrical horizontal portion 233 extending in the horizontal direction and a cylindrical hanging portion 234 hanging from the tip of the horizontal portion 233.
- the second nozzle pipe 232 is made of a resin material such as polyvinyl-chloride, PTFE (polytetrafluoroethylene), or PFA (perfluoro-alkylvinyl-ether-tetrafluoro-ethlene-copolymer).
- a processing liquid flow passage 235 is formed inside the second nozzle pipe 232.
- the processing liquid flow passage 235 is opened in a circular shape as the discharge port 236 at the lower end of the hanging part 234.
- a processing liquid (chemical solution or water) from a processing liquid supply source is supplied to the second nozzle pipe 232 via a processing liquid valve (not shown). When the processing liquid valve is opened, the processing liquid is supplied to the upstream end of the horizontal portion 233 of the second nozzle pipe 232.
- the processing liquid introduced into the second nozzle pipe 232 is discharged from the discharge port 236 after flowing through the processing liquid flow passage 235.
- the second nozzle pipe 232 is supported by a support shaft (not shown) extending substantially vertically on the side of the cup 17 (see FIG. 1), and rotational force is input to the support shaft to rotate the support shaft. By moving it, the second nozzle pipe 232 can be swung above the spin chuck 4 (see FIG. 1). That is, the second nozzle pipe 232 has a form as a scan nozzle.
- the processing liquid is not supplied to the substrate W (see FIG. 1)
- the second nozzle pipe 232 is retracted to the home position installed on the side of the cup 17 (see FIG. 1).
- the second nozzle pipe 232 is moved above the substrate W.
- the substrate processing apparatus 231 includes a bowl-shaped standby pod 237 for accommodating the second nozzle pipe 232 at the home position.
- the standby pod 237 has a pod body 238 having a substantially rectangular cross section along the longitudinal direction of the second nozzle pipe 232.
- a liquid storage groove 239 extending along the longitudinal direction of the second nozzle pipe 232 is formed on the upper surface of the pod body 238.
- the liquid reservoir groove 239 is formed over the entire area in the longitudinal direction except for both ends in the longitudinal direction.
- the liquid reservoir groove 239 has a substantially U-shaped cross section. The width and depth of the liquid reservoir groove 239 are set to a size that can accommodate the second nozzle pipe 232.
- End walls 240 are provided at both ends of the pod main body 238 in the longitudinal direction. Each end wall 240 is formed with an insertion hole 241 formed of a round hole substantially aligned with the second nozzle pipe 232.
- a waste liquid pipe 242 is connected to the bottom of the liquid reservoir groove 239. In the middle of the waste liquid pipe 242, a waste liquid valve 243 for opening and closing the waste liquid pipe 242 is interposed.
- the second nozzle pipe 232 is at the home position, the second nozzle pipe 232 is accommodated in the liquid storage groove 239. At this time, the second nozzle pipe 232 is inserted through the insertion holes 241 of both end walls 240.
- the water nozzle 61 of the water supply unit 230 has a second nozzle pipe 232 fixedly disposed above the standby pod 237 with the discharge port 53 directed to the liquid storage groove 239.
- the second nozzle pipe 232 is disposed at the home position.
- DIW is discharged from the water nozzle 61 of the water supply unit 230.
- DIW is stored in the liquid storage groove 239 of the standby pod 237.
- the entire area in the circumferential direction of the second nozzle pipe 232 (the horizontal portion 233 thereof) is immersed by the DIW stored in the liquid storage groove 239.
- the DIW discharged from the water nozzle 61 is continued.
- the supply flow rate of DIW to the water nozzle 61 is set to a relatively large flow rate (for example, 0.5 to 2.0 L / min). Therefore, the mode of DIW discharged from the discharge port 53 of the water nozzle 61 is a continuous flow mode connected to both the discharge port 53 and the DIW stored in the liquid storage groove 239. That is, DIW discharged from the discharge port 53 is connected in a liquid state between the discharge port 53 and the outer peripheral wall of the second nozzle pipe 232. In the first nozzle pipe 51, DIW is in a liquid-tight state.
- the soft X-rays from the soft X-ray irradiation unit 62 are irradiated inside the water nozzle 61 (first nozzle pipe 51).
- the irradiated portion 54 see FIG. 5 of the DIW.
- a plasma state is formed.
- the DIW irradiation portion 54 and the DIW in contact with the outer peripheral wall of the second nozzle pipe 232 are connected via the DIW.
- the processing liquid remains inside the second nozzle pipe 232 (particularly the horizontal portion 233).
- the outer peripheral wall of the second nozzle pipe 232 is positively or negatively charged, the residual processing liquid in the second nozzle pipe 232 may be positively or negatively charged due to induction charging.
- the processing liquid in such a charged state is supplied to the substrate W, even the substrate W is charged, and when the charge is discharged, the device formed on the upper surface of the substrate W is destroyed. May occur.
- DIW irradiation is caused by a potential difference between the DIW irradiation portion 54 (see FIG. 5) and the outer peripheral wall of the positively charged second nozzle pipe 232. Electrons from the portion 54 (see FIG. 5) move toward the outer peripheral wall of the second nozzle pipe 232 through the continuous flow DIW and the DIW stored in the liquid storage groove 239. As a result, the outer peripheral wall of the second nozzle pipe 232 that is positively charged is removed.
- FIG. 16 is a diagram showing a configuration of a substrate processing apparatus 251 according to the eighth embodiment of the present invention.
- the substrate processing apparatus 251 is different from the substrate processing apparatus 231 according to the seventh embodiment (see FIGS. 15A and 15B) in that the second nozzle pipe 232 is connected to the DIW stored in the liquid storage groove 239.
- the DIW from the discharge port 53 of the water nozzle 61 of the water supply unit (processing liquid supply device) 250 is directly supplied to the outer peripheral wall of the second nozzle pipe 232, thereby immersing the second nozzle pipe 232. This is the point of eliminating static electricity.
- the water supply unit 250 employs a configuration equivalent to that of the water supply unit 100 (see FIG. 1) except for the configuration of the moving unit 252 described below. Therefore, the same reference numerals as those in the case of the water supply unit 100 are attached, and the description is omitted.
- a moving unit 252 for moving the integrated head 6 in the horizontal direction is coupled to the integrated head 6.
- the moving unit 252 is configured using a ball nut or a motor, and is connected to the control device 40 (see FIG. 3) as a control target.
- the control device 40 supplies DIW (an example of water) to the water nozzle 61 (first nozzle pipe 51) and at the same time the water nozzle 61 (first The soft X-rays from the soft X-ray irradiation unit 62 are irradiated inside the one nozzle pipe 51). DIW discharged from the water nozzle 61 of the integrated head 6 is supplied to the outer peripheral wall of the second nozzle pipe 232 and flows down along the outer peripheral wall of the second nozzle pipe 232.
- DIW an example of water
- the supply flow rate of DIW to the water nozzle 61 is set to a relatively large flow rate (for example, 0.5 to 2.0 L / min). Therefore, the mode of DIW discharged from the discharge port 53 of the water nozzle 61 is a continuous flow mode connected to both the discharge port 53 and the outer peripheral wall of the second nozzle pipe 232. In the first nozzle pipe 51, DIW is in a liquid-tight state.
- the soft X-rays from the soft X-ray irradiation unit 62 are irradiated inside the water nozzle 61 (first nozzle pipe 51).
- the irradiated portion 54 see FIG. 5 of the DIW.
- a plasma state is formed.
- the DIW irradiation portion 54 and the DIW in contact with the outer peripheral wall of the second nozzle pipe 232 are connected via the DIW.
- the control device 40 controls the moving unit 252 to move the DIW liquid landing site on the outer peripheral wall of the second nozzle pipe 232 (horizontal portion 233) in one direction along the longitudinal direction of the second nozzle pipe 232. Or reciprocate. Accordingly, the position of the second nozzle pipe 232 to be neutralized can be moved along the longitudinal direction of the second nozzle pipe 232 (horizontal portion 233). Therefore, the second nozzle pipe 232 (horizontal portion 233) It is possible to remove static electricity in a substantially entire area of the outer peripheral wall.
- 17 (a) and 17 (b) are diagrams showing the configuration of the substrate processing apparatus 261 according to the ninth embodiment of the present invention.
- the substrate processing apparatus 261 includes a water supply unit (processing liquid supply apparatus) 260 instead of the water supply unit 100 (see FIG. 1) according to the first embodiment, and the substrate processing apparatus 1 according to the first embodiment (
- the other configuration is the same as that of the substrate processing apparatus 1.
- 17 (a) and 17 (b) show only the configuration related to the water supply unit 260, and the other parts are not shown.
- FIG. 17A is a longitudinal sectional view of a second nozzle pipe 262 and a third nozzle pipe 272 to be described next, and FIG. 17B is viewed from a cutting plane line B1-B1 in FIG. 17A. It is sectional drawing.
- the water supply unit 260 includes a second nozzle pipe 262 and a third nozzle pipe 272.
- the second nozzle pipe 262 and the third nozzle pipe 272 form a double pipe structure by inserting the second nozzle pipe 262 into the third nozzle pipe 272.
- the second nozzle pipe 262 is integrally provided with a cylindrical horizontal portion 263 extending in the horizontal direction and a cylindrical hanging portion 264 that hangs down from the tip of the horizontal portion 263.
- the second nozzle pipe 262 is formed of a resin material such as polyvinyl-chloride, PTFE (polytetrafluoroethylene), or PFA (perfluoro-alkylvinyl-ether-tetrafluoro-ethlene-copolymer).
- a processing liquid flow passage 265 is formed inside the second nozzle pipe 262.
- the processing liquid flow passage 265 opens in a circular shape as the discharge port 266 at the lower end of the hanging part 264.
- a processing liquid (chemical solution or water) from a processing liquid supply source is supplied to the second nozzle pipe 262 via a processing liquid valve (not shown).
- the water supply unit 260 includes a part of the configuration of the water supply unit 200 (see FIG. 11) according to the fourth embodiment. That is, the water supply unit 260 includes a water supply pipe 204, a soft X-ray irradiation unit 203, and a water valve 205.
- the soft X-ray irradiation unit 203 and the water supply pipe 204 are described in the fourth embodiment except that the water supply pipe 204 supplies DIW (an example of water) from the DIW supply source to the third nozzle pipe 272. Since it is the structure as it was, detailed description is abbreviate
- the third nozzle pipe 272 is integrally provided with a cylindrical horizontal portion 273 extending in the horizontal direction and a cylindrical hanging portion 274 depending from the tip of the horizontal portion 273.
- the third nozzle pipe 272 is formed of a resin material such as polyvinyl-chloride, PTFE (polytetrafluoroethylene), or PFA (perfluoro-alkylvinyl-ether-tetrafluoro-ethlene-copolymer).
- the horizontal portion 263 of the second nozzle pipe 262 passes through the horizontal portion 273 of the third nozzle pipe 272, passes through the wall of the drooping portion 274 of the third nozzle pipe 272, and the downstream end thereof is the second nozzle pipe.
- a water flow passage 275 is formed in a space between the inner wall of the third nozzle pipe 272 and the outer wall of the second nozzle pipe 262.
- the water flow passage 275 opens in an annular shape as a discharge port 276 at the lower end of the hanging portion 274.
- the processing liquid valve When performing the processing liquid processing using the processing liquid on the substrate W, the processing liquid valve is opened.
- the processing liquid valve is opened, the processing liquid is supplied to the upstream end of the horizontal portion 263 of the second nozzle pipe 262.
- the processing liquid introduced into the second nozzle pipe 262 is discharged from the discharge port 266 after flowing through the processing liquid flow passage 265.
- the processing liquid valve is closed, but then the processing liquid remains inside the second nozzle pipe 262 (particularly the horizontal portion 263).
- the water valve 205 When supplying DIW to the substrate W, the water valve 205 is opened. DIW is supplied to the upstream end of the water flow passage 275 of the third nozzle pipe 272. DIW introduced into the third nozzle pipe 272 is discharged from the discharge port 276 after flowing through the water flow passage 275. When the DIW supply stop timing is reached, the water valve 205 is closed, but DIW remains in the space between the inner wall of the third nozzle pipe 272 and the outer wall of the second nozzle pipe 262 thereafter.
- the residual processing liquid in the second nozzle pipe 262 may be positively or negatively charged due to induction charging.
- the processing liquid in such a charged state is supplied to the substrate W, even the substrate W is charged, and when the charge is discharged, the device formed on the upper surface of the substrate W is destroyed. May occur.
- the outer peripheral wall of the third nozzle pipe 272 is charged first, and then the outer wall of the second nozzle pipe 262 and the inner wall of the third nozzle pipe 272. It is conceivable that the outer peripheral wall of the second nozzle pipe 262 is charged through the residual DIW between the first nozzle pipe 262 and the second nozzle pipe 262.
- the soft X-ray irradiation unit 203 softens the water supply pipe 204. X-ray irradiation continues.
- DIW remaining between the outer wall of the second nozzle pipe 262 and the inner wall of the third nozzle pipe 272 and DIW existing in the water supply pipe 204 are in a liquid-tight state (in a continuous flow form). )It is connected.
- the potential difference between the DIW irradiated portion in the water supply pipe 204 and the positively charged third nozzle pipe 272 causes a difference in the water supply pipe 204. Electrons from the irradiated portion of DIW travel through DIW in the water supply pipe 204 and DIW remaining between the outer wall of the second nozzle pipe 262 and the inner wall of the third nozzle pipe 272 toward the third nozzle pipe 272. Move. As a result, the positively charged third nozzle pipe 272 is neutralized.
- the third nozzle pipe 272 when the third nozzle pipe 272 is negatively charged, the electrons from the third nozzle pipe 272 are directed toward the positive ions at the DIW irradiated portion in the water supply pipe 204, and the DIW in the water supply pipe 204.
- the second nozzle pipe 262 moves along the DIW remaining between the outer wall of the second nozzle pipe 262 and the inner wall of the third nozzle pipe 272. As a result, the third nozzle pipe 272 is neutralized.
- the second nozzle pipe 262 is positively charged, electrons from the DIW irradiated portion in the water supply pipe 204 are transferred to the DIW in the water supply pipe 204 and the outer wall of the second nozzle pipe 262. The residual DIW is transferred to the inner wall of the three-nozzle pipe 272 and moves toward the second nozzle pipe 262. If the second nozzle pipe 262 is negatively charged, the electrons from the second nozzle pipe 262 are directed toward the positive ions at the DIW irradiated portion in the water supply pipe 204, and the DIW in the water supply pipe 204. The second nozzle pipe 262 moves along the DIW remaining between the outer wall of the second nozzle pipe 262 and the inner wall of the third nozzle pipe 272. That is, even if the second nozzle pipe 262 is charged, the charge removal of the second nozzle pipe 262 can be achieved in this way.
- FIG. 18 is a diagram showing a configuration of a substrate processing apparatus 301 according to the tenth embodiment of the present invention.
- the substrate processing apparatus 301 includes a water supply unit (treatment liquid supply apparatus) 300 for supplying DIW (an example of water) to the lower surface of the substrate W, and the water supply unit 100 with respect to the upper surface of the substrate W. It differs from the substrate processing apparatus 1 (refer FIG. 1) which concerns on 1st Embodiment in the point which replaces (refer FIG. 1) and supplies DIW (an example of water) with the water nozzle 302 mainly.
- DIW an example of water
- the water nozzle 302 is constituted by a straight nozzle that discharges liquid in a continuous flow state, and the water nozzle 302 is fixedly disposed in the processing chamber 3 with the discharge port directed toward the center of the upper surface of the substrate W. Yes.
- a water supply pipe 303 to which DIW is supplied from a DIW supply source is connected to the water nozzle 302.
- the water supply pipe 303 is provided with a water valve 304 for opening and closing the water supply pipe 303.
- the spin shaft 9 is a hollow shaft.
- a lower processing liquid supply pipe 305 is inserted into the spin shaft 9 in a non-contact state.
- the water supply unit 300 supplies DIW from the DIW supply source to the lower processing liquid supply pipe 305, the lower surface nozzle 306 attached to the upper end of the lower processing liquid supply pipe 305, and the lower processing liquid supply pipe 305.
- a water supply pipe (treatment liquid pipe) 307 to be supplied and a soft X-ray irradiation unit (X-ray irradiation means) 309 for irradiating the DIW existing in the water supply pipe 307 with soft X-rays are included.
- the soft X-ray irradiation unit 309 is attached to the water supply pipe 307.
- the lower surface nozzle 306 is disposed so that its discharge port 306A (see FIG. 19) is close to the center of the lower surface of the substrate W supported by the sandwiching member 11.
- a water supply pipe 307 is connected to the lower processing liquid supply pipe 305.
- DIW can be supplied from the lower processing liquid supply pipe 305 to the lower surface nozzle 306 and discharged from the discharge port 306A (see FIG. 19) of the lower surface nozzle 306 toward the center of the lower surface of the substrate W. .
- the water supply pipe 307 has a round tubular shape (cylindrical shape).
- the water supply pipe 307 is formed using a resin material such as polyvinyl-chloride, PTFE (poly-tetra-fluoro-ethylene), or PFA (perfluoro-alkyl vinyl-ether-tetrafluoro-ethlene-copolymer).
- a resin material such as polyvinyl-chloride, PTFE (poly-tetra-fluoro-ethylene), or PFA (perfluoro-alkyl vinyl-ether-tetrafluoro-ethlene-copolymer).
- An opening (not shown) is formed in the tube wall in the middle of the water supply pipe 307.
- the soft X-ray irradiation unit 309 employs the same configuration as the soft X-ray irradiation unit 62 (see FIG. 2) according to the first embodiment.
- the soft X-ray irradiation unit 309 is attached to the water supply pipe 307 so as to close the opening of the water supply pipe 307.
- the opening of the cover of the soft X-ray irradiation unit 309 corresponds with the opening of the water supply pipe 307.
- the wall surface of the cover of the soft X-ray irradiation unit 309 (corresponding to the lateral wall 26A (see FIG.
- the high voltage unit of the soft X-ray irradiation unit 309 (corresponding to the high voltage unit 31 (see FIG. 2) of the soft X-ray irradiation unit 62 according to the first embodiment) is connected to the control device 40 (see FIG. 3). Yes.
- the water supply pipe 307 is provided with a water valve 308 for opening and closing the water supply pipe 307.
- the water valve 308 is connected to the control device 40 (see FIG. 3).
- the same processing as in the processing example shown in FIG. 4 is performed.
- the control device 40 opens the water valve 304. Thereby, DIW is discharged from the water nozzle 302 toward the center of the upper surface of the substrate W.
- the control device 40 opens the water valve 308.
- DIW flowing through the water supply pipe 307 is supplied to the lower surface nozzle 306. DIW is discharged upward from the discharge port 306A of the lower surface nozzle 306 toward the center of the lower surface of the substrate W.
- the control device 40 controls the high voltage unit of the soft X-ray irradiation unit 309 to generate soft X-rays of the soft X-ray irradiation unit 309.
- a soft X-ray is generated in a vessel (corresponding to the soft X-ray generator 25 (see FIG. 2) of the soft X-ray irradiation unit 62 according to the first embodiment), and this soft X-ray is generated inside the water supply pipe 307. Irradiate toward Thereby, soft X-rays are irradiated to DIW which distribute
- FIG. 19 is a diagram showing a DIW flow of the rinsing process in the substrate processing apparatus 301.
- the DIW supplied to the central portion of the upper surface of the substrate W receives a centrifugal force due to the rotation of the substrate W, and spreads on the upper surface of the substrate W from the central portion toward the peripheral portion. As a result, a DIW liquid film is formed over the entire upper surface of the substrate W. The chemical liquid adhering to the upper surface of the substrate W is washed away by the liquid film of DIW.
- DIW supplied to the central portion of the lower surface of the substrate W receives a centrifugal force due to the rotation of the substrate W, propagates along the lower surface of the substrate W to the outer side of the rotation radius, and reaches the lower peripheral edge 321 of the substrate W It reaches. Therefore, a DIW liquid film is formed on the entire lower surface of the substrate W.
- DIW that has reached the lower surface peripheral portion 321 goes around the peripheral end surface 322 of the substrate W and reaches the upper surface peripheral portion 323 of the substrate W.
- the DIW that has passed through the upper surface of the substrate W and the DIW that has come around from the peripheral end surface 322 of the substrate W come to merge at the upper peripheral edge 323 of the substrate W as shown in FIG. Therefore, the DIW liquid film formed on the upper surface of the substrate W and the DIW liquid film formed on the lower surface of the substrate W are connected to each other.
- the supply flow rate of DIW to the lower surface nozzle 306 during the rinsing process is set to a relatively large flow rate (for example, 0.5 to 2.0 L / min). Therefore, the mode of DIW discharged from the discharge port 306A of the lower surface nozzle 306 is a continuous flow mode connected to both the discharge port 306A and the liquid film of DIW formed on the lower surface of the substrate W.
- the DIW discharged from the discharge port 306A is Not only the DIW liquid film formed on the lower surface but also the DIW liquid film formed on the upper surface of the substrate W are connected in liquid form. Further, DIW is in a liquid-tight state in the nozzle pipe of the lower surface nozzle 306, the lower processing liquid supply pipe 305, and the water supply pipe 307.
- the DIW irradiated portion in the water supply pipe 307 (shown in FIG. 5 of the DIW according to the first embodiment)
- electrons are emitted from the water molecules by excitation of the water molecules.
- a plasma state in which a large amount of electrons and a large amount of positive ions of water molecules are mixed is formed in the DIW irradiated portion in the water supply pipe 307.
- the DIW irradiated portion is connected to the DIW liquid film formed on the lower surface of the substrate W and the DIW liquid film formed on the upper surface of the substrate W via the DIW.
- the potential difference between the DIW irradiated portion in the water supply pipe 307 and the positively charged substrate W is different from the DIW irradiated portion in the water supply pipe 307. Electrons move along the lower processing liquid supply pipe 305, the water supply pipe 307, and the continuous flow DIW toward the DIW liquid films on the upper surface and the lower surface of the substrate W. Thereby, the liquid films of DIW formed on the lower surface and the upper surface of the substrate W each have a large amount of electrons.
- the substrate W when simultaneous rinsing processing is performed on both the upper and lower surfaces of the substrate W, even if DIW is supplied to the upper and lower surfaces of the rotating substrate W, the substrate W is not charged by contact separation with the DIW. The charging of the substrate W at the time can be prevented. Further, even if the substrate W is charged before the rinsing process, the charge on the substrate W can be removed (that is, static elimination). As a result, device destruction due to charging of the substrate W can be prevented.
- FIG. 20 is a diagram showing a configuration of a substrate processing apparatus 311 according to the eleventh embodiment of the present invention.
- a water supply unit (processing liquid supply apparatus) 310 is provided instead of the water supply unit 300 (see FIG. 18).
- a soft X-ray irradiation device 314 is disposed in the processing chamber 3. In the eleventh embodiment, these points are different from the tenth embodiment.
- the water supply unit 310 includes a lower processing liquid supply pipe 305, a lower surface nozzle 306, a water supply pipe 307, a second branch pipe (branch pipe) 312 that branches from a middle portion of the water supply pipe 307, and a second branch. And a soft X-ray irradiation unit (X-ray irradiation means) 319 for irradiating DIW (an example of water) existing in the pipe 312 with soft X-rays.
- the soft X-ray irradiation unit 319 is attached to the second branch pipe 312.
- the second branch pipe 312 branches from a portion upstream of the water valve 308 in the water supply pipe 307.
- the second branch pipe 312 has a round tubular shape (cylindrical shape), such as poly-vinyl-chloride, PTFE (polytetrafluoroethylene), PFA (perfluoro-alkylvinyl-ether-tetrafluoro-ethlene-copolymer), etc. These resin materials are used.
- a branch valve 318 for opening and closing the second branch pipe 312 is interposed in the middle of the second branch pipe 312.
- the branch valve 318 is connected to the control device 40 (see FIG. 3).
- the second branch pipe 312 has an opening (not shown) in a predetermined portion of the pipe wall upstream of the branch valve 318.
- a second cup nozzle 313 is attached to the downstream end of the second branch pipe 312.
- the second cup nozzle 313 is constituted by a straight nozzle that discharges liquid in a continuous flow state, and the discharge port 313A (see FIG. 21. liquid receiving discharge port) is connected to the inner wall (for example, inclined) of the cup upper portion 19. In a state facing the lower surface of the portion 21, for example, it is fixedly disposed on the outer wall of the spin chuck 4.
- the soft X-ray irradiation unit 319 employs the same configuration as the soft X-ray irradiation unit 62 (see FIG. 2) according to the first embodiment.
- the soft X-ray irradiation unit 319 is attached to the second branch pipe 312 so as to close the opening of the second branch pipe 312.
- the opening of the cover of the soft X-ray irradiation unit 319 (corresponding to the second opening 28 (see FIG. 2) of the cover 26 of the soft X-ray irradiation unit 62) is equal to the opening of the second branch pipe 312.
- the wall surface of the cover of the soft X-ray irradiation unit 319 (corresponding to the lateral wall 26A (see FIG.
- the high voltage unit of the soft X-ray irradiation unit 319 (corresponding to the high voltage unit 31 (see FIG. 2) of the soft X-ray irradiation unit 62 according to the first embodiment) is connected to the control device 40 (see FIG. 3). Yes.
- DIW is supplied from the water supply pipe 307 to the lower surface nozzle 306 via the lower processing liquid supply pipe 305 and is discharged from the discharge port 306A of the lower surface nozzle 306. DIW is discharged.
- the branch valve 318 is opened with the water valve 308 closed, DIW is supplied from the second branch pipe 312 to the second cup nozzle 313, and DIW is discharged from the discharge port 313A of the second cup nozzle 313.
- the soft X-ray irradiation device 314 includes a soft X-ray generator 315 having an irradiation window 316.
- Soft X-rays generated in the irradiation window 316 are emitted (radiated) outside the soft X-ray irradiation device 314.
- the irradiation angle (irradiation range) of soft X-rays from the irradiation window 316 is, for example, 130 °, and the soft X-rays irradiated from the irradiation window 316 have a wavelength of, for example, 0.13 to 0.41 nm.
- the soft X-ray generator 315 adopts the same configuration as the soft X-ray generator 25 (see FIG.
- the soft X-ray irradiation device 314 is disposed above the cup upper portion 19 so that the irradiation window 316 faces the upper surface of the inclined portion 21 of the cup upper portion 19.
- the same processing as in the processing example shown in FIG. 4 is performed. However, before the substrate W is loaded in step S 1 of FIG.
- the eleventh embodiment is common to the sixth embodiment in that the cup 17 is subjected to charge removal.
- the eleventh embodiment is not limited to supplying DIW to the cup upper portion 19 but also softening in parallel with the supply of DIW. It differs from the case of 6th Embodiment by the point which soft X-rays are irradiated from the X-ray irradiation apparatus 314, and the cup 17 is neutralized.
- the control device 40 controls the high voltage unit of the soft X-ray irradiation unit 319, and the soft X-ray generator of the soft X-ray irradiation unit 319 (the soft X-ray irradiation unit 62 according to the first embodiment).
- the soft X-ray generator 25 (refer to FIG. 2) generates soft X-rays and irradiates the soft X-rays toward the inside of the second branch pipe 312. Further, the control device 40 opens the branch valve 318 while closing the water valve 308. Thereby, DIW which circulated through the 2nd branch piping 312 is discharged from discharge port 313A (refer to Drawing 21) of nozzle 313 for the 2nd cup.
- FIG. 21 is a view showing a state where the water supply unit 310 shown in FIG. 20 supplies DIW to the inclined portion 21 of the cup upper portion 19.
- DIW discharged from the discharge port 313A is supplied to the lower surface of the inclined portion 21 of the cup upper portion 19 and flows downward along the lower surface of the inclined portion 21. Therefore, a DIW liquid film is formed on the lower surface of the inclined portion 21.
- the supply flow rate of DIW to the second cup nozzle 313 is set to a relatively large flow rate (for example, 0.5 to 2.0 L / min). Therefore, the mode of DIW discharged from the discharge port 313A of the second cup nozzle 313 has a continuous flow mode connected to both the discharge port 313A and the DIW liquid film on the lower surface of the inclined portion 21. Further, DIW is in a liquid-tight state in the nozzle pipe of the second cup nozzle 313 and in the second branch pipe 312.
- the potential difference between the DIW irradiated portion in the second branch pipe 312 and the positively charged cup upper portion 19 causes the DIW in the second branch pipe 312 to be positive. Electrons from the irradiated portion move along the continuous flow DIW toward the DIW liquid film on the lower surface of the inclined portion 21. As a result, the DIW liquid film on the lower surface of the inclined portion 21 has a large amount of electrons, so that a portion of the positively charged cup upper portion 19 that is in contact with the DIW liquid film is discharged.
- the cup upper portion 19 when the cup upper portion 19 is negatively charged, the electrons from the cup upper portion 19 move along the continuous flow treatment liquid toward the positive ions in the DIW irradiated portion in the second branch pipe 312. To do. Therefore, the portion of the cup upper portion 19 that is negatively charged and in contact with the DIW liquid film is neutralized.
- control device 40 controls the high voltage unit of the soft X-ray irradiation device 314 to generate soft X-rays in the soft X-ray generator 315 of the soft X-ray irradiation device 314, Irradiate the upper surface of the inclined portion 21 of the cup upper portion 19.
- the inclined portion 21 of the cup upper portion 19 is a member that is disposed around the substrate W during processing. However, by applying soft X-rays from the soft X-ray irradiation device 314, the inclined portion 21 can be prevented from being charged and discharged. .
- the unprocessed substrate W is carried into the processing chamber 3 and delivered to the spin chuck 4.
- the control device 40 controls the spin motor 8 to start the rotation of the substrate W by the spin chuck 4 (step S2 in FIG. 4).
- the rotation speed of the substrate W is increased to a predetermined liquid processing speed (for example, 500 rpm), and then maintained at the liquid processing speed.
- the control device 40 In the rinsing process (steps S4 to S6 in FIG. 4), the control device 40 (see FIG. 3) opens the water valve 308 while closing the branch valve 318. In addition, when a predetermined time elapses after the opening of the water valve 308 and the soft X-ray irradiation timing is reached, the control device 40 controls the high voltage unit of the soft X-ray irradiation unit 319 so that the soft X-ray irradiation unit 319 has a soft X-ray irradiation timing. Soft X-rays are generated in the line generator, and the soft X-rays are irradiated toward the inside of the second branch pipe 312. Thus, DIW is discharged from the lower surface nozzle 306 toward the center of the lower surface of the substrate W.
- the DIW supplied to the central portion of the lower surface of the substrate W spreads to the outer side of the rotation radius along the lower surface of the substrate W, as in the case of the tenth embodiment, and the peripheral end surface 322 (see FIG. 19) of the substrate W. It goes around and reaches the peripheral edge of the upper surface of the substrate W. Then, the DIW that has traveled along the upper surface of the substrate W and the DIW that has circulated from the peripheral end surface 322 of the substrate W merge at the peripheral edge of the upper surface of the substrate W, and as a result, the DIW formed over the entire upper surface of the substrate W. And the DIW liquid film formed over the entire lower surface of the substrate W are connected to each other.
- the mode of DIW discharged from the discharge port 306A of the lower surface nozzle 306 is a continuous flow mode connected to both the discharge port 306A and the liquid film of DIW formed on the lower surface of the substrate W. Since the DIW liquid film formed on the upper surface of the substrate W and the DIW liquid film formed on the lower surface of the substrate W are connected to each other, the DIW discharged from the discharge port 306A is formed on the lower surface of the substrate W. In addition to the DIW liquid film, the DIW liquid film formed on the upper surface of the substrate W is connected in liquid form. Further, DIW is in a liquid-tight state in the nozzle pipe of the lower surface nozzle 306, the lower processing liquid supply pipe 305, the water supply pipe 307, and the second branch pipe 312.
- the DIW irradiated portion in the second branch pipe 312 When the DIW existing in the second branch pipe 312 is irradiated with soft X-rays during the rinsing process, the DIW irradiated portion in the second branch pipe 312 (according to the first embodiment shown in FIG. 5). In the DIW irradiated portion 54), electrons are emitted from the water molecules by excitation of the water molecules. As a result, a plasma state in which a large amount of electrons and a large amount of positive ions of water molecules are mixed is formed in the DIW irradiated portion in the second branch pipe 312. The DIW irradiated portion is connected to the DIW liquid film formed on the lower surface of the substrate W and the DIW liquid film formed on the upper surface of the substrate W via the DIW.
- step S8 soft X-ray irradiation by the soft X-ray irradiation apparatus 314 may be performed prior to the loading of the substrate W, but not only before the loading of the substrate W but also spin dry (FIG. 4).
- step S8 soft X-ray irradiation by the soft X-ray irradiation apparatus 314 may be performed.
- the surface of the substrate W immediately after the treatment liquid is shaken off is irradiated with soft X-rays. Prevention and static elimination can be achieved more reliably.
- two water supply units 310 and a soft X-ray irradiation device 314 having a configuration including the second cup nozzle 313 are provided.
- only one of the water supply unit 310 and the soft X-ray irradiation device 314 may be provided.
- FIG. 22 is a diagram showing a configuration of a substrate processing apparatus 401 according to the twelfth embodiment of the present invention.
- the substrate processing apparatus 401 mainly includes a spin chuck (substrate holding and rotating means) 402 instead of the spin chuck 4 and supplies DIW (an example of water) to the lower surface of the substrate W via the spin chuck 402. Two points are different from the substrate processing apparatus 301 (see FIG. 18) according to the tenth embodiment.
- the substrate processing apparatus 401 includes a water supply unit (processing liquid supply apparatus) 400.
- the spin chuck 402 is a sandwich type. Specifically, the spin chuck 402 includes a spin motor 403, a spin shaft (support member) 404 integrated with a drive shaft of the spin motor 403, and a disc attached substantially horizontally to the upper end of the spin shaft 404.
- a spin base (support member) 405 having a plurality of shapes, and a plurality of sandwiching members 406 provided at substantially equal intervals at a plurality of positions on the peripheral edge of the spin base 405 are provided.
- the spin shaft 404 includes an inner shaft portion 407 formed using a resin, steel, or the like, and an outer cylinder portion 408 formed using a porous material, and the inner shaft portion 407 is inserted into the outer cylinder portion 408. It is integrated in the state. That is, the outer periphery of the inner shaft portion 407 is surrounded by the outer cylinder portion 408 in a close contact state.
- the spin base 405 is formed using a porous material.
- An upper end surface of the outer cylinder portion 408 is connected to the lower surface 405B of the spin base 405 in a close contact state.
- the clamping member 406 is formed using a steel material or the like. In a state where the substrate W is sandwiched by the plurality of sandwiching members 406, the specifications of the sandwiching member 406 and the thickness in the height direction of the spin base 405 are such that the entire lower surface of the substrate W is in contact with the upper surface of the spin base 405. , Each is set.
- the porous material that is the material of the outer cylindrical portion 408 of the spin shaft 404 and the spin base 405 is, for example, a sponge made of PVA (polyvinyl alcohol) and has a large number of pores.
- the pores of the porous material have a size (for example, a diameter of 0.05 to 100 ⁇ m) through which DIW (an example of water) can pass. Therefore, it is possible to pass the DIW through the pores of the porous material. Therefore, it is possible to move the DIW in the outer cylinder portion 408 or the spin base 405.
- urethane resin as a raw material of the porous material, urethane resin, fluorine resin (PTFE (polytetrafluoroethylene)), PEEK (polyether-ether-ketone), PVC (polyvinyl chloride), and
- PTFE polytetrafluoroethylene
- PEEK polyether-ether-ketone
- PVC polyvinyl chloride
- PFA perfluoro-alkylvinyl-ether-tetrafluoro-ethlene-copolymer
- the water supply unit 400 exists in the water nozzle 409, a water supply pipe (treatment liquid pipe) 410 that supplies DIW (an example of water) from a DIW supply source to the water nozzle 409, and the water supply pipe 410.
- a soft X-ray irradiation unit (X-ray irradiation means) 412 for irradiating the DIW with soft X-rays.
- the soft X-ray irradiation unit 412 is attached to the water supply pipe 410.
- the water nozzle 409 has a round tubular (cylindrical) nozzle pipe and is attached to the tip of the water supply pipe 410.
- the water nozzle 409 is configured by a straight nozzle that discharges liquid in a continuous flow state, and the discharge port 409A is fixed in the processing chamber 3 with the discharge port 409A facing the outer cylindrical portion 408 of the spin shaft 404. Has been placed.
- the water supply pipe 410 has a round tubular shape (cylindrical shape).
- the water supply pipe 410 is formed using a resin material such as polyvinyl-chloride, PTFE (poly-tetra-fluoro-ethylene), or PFA (perfluoro-alkylvinyl-ether-tetrafluoro-ethlene-copolymer).
- a resin material such as polyvinyl-chloride, PTFE (poly-tetra-fluoro-ethylene), or PFA (perfluoro-alkylvinyl-ether-tetrafluoro-ethlene-copolymer).
- An opening (not shown) is formed in the tube wall in the middle of the water supply pipe 410.
- the soft X-ray irradiation unit 412 adopts the same configuration as the soft X-ray irradiation unit 62 (see FIG. 2) according to the first embodiment.
- the soft X-ray irradiation unit 412 is attached to the water supply pipe 410 so as to close the opening of the water supply pipe 410.
- the opening of the cover of the soft X-ray irradiation unit 412 corresponds with the opening of the water supply pipe 410.
- the wall surface of the cover of the soft X-ray irradiation unit 412 (corresponding to the lateral wall 26A (see FIG.
- a high voltage unit of the soft X-ray irradiation unit 412 (corresponding to the high voltage unit 31 (see FIG. 2) of the soft X-ray irradiation unit 62 according to the first embodiment) is connected to the control device 40 (see FIG. 3). Yes.
- a water valve 411 for opening and closing the water supply pipe 410 is interposed in the water supply pipe 410.
- the water valve 411 is connected to the control device 40 (see FIG. 3).
- the control device 40 see FIG. 3
- DIW is supplied from the water supply pipe 410 to the water nozzle 409, and when the water valve 411 is closed, the supply of DIW to the water nozzle 409 is stopped.
- FIG. 23 is a diagram illustrating a state in which the water supply unit 400 is supplying DIW to the outer cylinder portion 408.
- the same processing as in the processing example shown in FIG. 4 is performed.
- the control device 40 opens the water valve 304. Accordingly, DIW is discharged from the discharge port 302A of the water nozzle 302 toward the center of the upper surface of the substrate W.
- the DIW supplied to the central portion of the upper surface of the substrate W receives a centrifugal force due to the rotation of the substrate W and spreads on the upper surface of the substrate W from the central portion toward the peripheral portion. As a result, a DIW liquid film is formed over the entire upper surface of the substrate W. The chemical liquid adhering to the upper surface of the substrate W is washed away by the liquid film of DIW.
- the control device 40 opens the water valve 411 in conjunction with the opening of the water valve 304.
- DIW flowing through the water supply pipe 410 is supplied to the water nozzle 409. DIW is discharged laterally from the discharge port 409A of the water nozzle 409 toward the outer cylinder portion 408 of the spin shaft 404.
- DIW supplied to the outer peripheral surface of the outer cylinder portion 408 penetrates into the outer cylinder portion 408, passes through the outer cylinder portion 408, and is supplied to the lower surface 405B of the spin base 405.
- the DIW supplied to the lower surface 405B of the spin base 405 penetrates into the spin base 405, passes through the outer cylindrical portion 408, and is supplied to the upper surface 405A of the spin base 405.
- the DIW impregnated in the spin base 405 oozes out from the upper surface 405A, and as shown in FIG. 23, a DIW liquid film is formed on the upper surface 405A.
- the DIW liquid film is in contact with the lower surface of the substrate W, the chemical liquid adhering to the lower surface of the substrate W is washed away by the DIW. Thereby, the rinsing process can be performed on the entire lower surface of the substrate W.
- the water nozzle 409 has a discharge port 409A disposed at a small distance S1 from the outer peripheral surface of the outer tube portion 408. Further, the DIW supply flow rate to the water nozzle 61 during the rinsing process is set to a relatively large flow rate (for example, 0.5 to 2.0 L / min). Therefore, the form of DIW discharged from the discharge port 409A of the water nozzle 409 forms a continuous flow that is connected to both the discharge port 409A and the outer peripheral surface of the outer cylindrical portion 408 of the spin shaft 404. Therefore, the DIW discharged from the discharge port 409A is connected in liquid form to the DIW liquid film formed on the lower surface of the substrate W. Further, DIW is in a liquid-tight state in the nozzle pipe of the water nozzle 409 and the water supply pipe 410.
- the control device 40 controls the high voltage unit of the soft X-ray irradiation unit 412 to generate soft X-rays of the soft X-ray irradiation unit 412.
- a soft X-ray is generated in a vessel (corresponding to the soft X-ray generator 25 (see FIG. 2) of the soft X-ray irradiation unit 62 according to the first embodiment), and the soft X-ray is generated inside the water supply pipe 410. Irradiate toward Thereby, soft X-rays are irradiated to DIW circulating in the water supply pipe 410.
- the DIW irradiated portion in the water supply pipe 410 (shown in FIG. 5 of the DIW according to the first embodiment) In the same manner as the irradiated portion 54), electrons are emitted from the water molecules by excitation of the water molecules. As a result, a plasma state in which a large amount of electrons and a large amount of positive ions of water molecules are mixed is formed in the DIW irradiated portion in the water supply pipe 410.
- the DIW irradiated portion is connected to the DIW liquid film formed on the lower surface of the substrate W via the DIW.
- the DIW in the water supply pipe 410 is determined by the potential difference between the DIW irradiated portion in the water supply pipe 410 and the lower surface of the positively charged substrate W. Electrons from the irradiated portion move toward the DIW liquid film in contact with the lower surface of the substrate W along the continuous flow DIW. As a result, the liquid film of DIW in contact with the lower surface of the substrate W has a large amount of electrons.
- the present invention is based on the single wafer processing apparatus 1,201, 211, 221, 231, 251, 261, 301, 311, 401 for processing the circular substrate W.
- the present invention can also be applied to a substrate transport type substrate processing apparatus for processing a square (sheet-like) substrate.
- FIG. 24 is an illustrative perspective view showing the configuration of the substrate processing apparatus 501 according to the thirteenth embodiment of the present invention.
- the substrate processing apparatus 501 is an apparatus used for cleaning the surface (surface to be processed) of a square glass substrate for a liquid crystal display device as an example of the substrate W using a processing liquid such as water.
- the length of one side of the square substrate W to be processed is, for example, in the range of several tens of cm to 2 m, and the plate thickness is in the range of about 0.5 to 1.2 mm.
- the horizontal direction along the transport direction of the substrate W which will be described below, is defined as the X direction
- the horizontal direction orthogonal to the X direction is defined as the Y direction
- the vertical direction is defined as the Z direction.
- the substrate processing apparatus 501 includes a roller transport unit 504 (substrate holding and transporting unit) for transporting the substrate W along the X direction, and DIW (treatment liquid) on the surface of the substrate W transported by the roller transport unit 504.
- a water supply unit (processing liquid supply device) 500 for supplying water (an example of water), a gas knife nozzle 519 for blowing nitrogen gas as an example of an inert gas onto the surface of the substrate W being transferred by the roller transfer unit 504, And a soft X-ray irradiation device 512 that irradiates the surface of the substrate W transported by the roller transport unit 504 with soft X-rays.
- the substrate processing apparatus 501 supplies DIW to the surface of the substrate W and performs a cleaning process chamber 502 for cleaning the surface of the substrate W, and a liquid draining process for draining DIW adhering to the surface of the substrate W.
- the cleaning processing chamber 502 and the liquid draining chamber 503 are disposed adjacent to each other.
- a supply unit 500 is disposed above the roller transport unit 504 in the cleaning processing chamber 502.
- a gas knife nozzle 519 and a soft X-ray irradiation device 512 are arranged in this order in the transport direction above the roller transport unit 504.
- the roller transport unit 504 is arranged in a state extending in the left-right direction so as to straddle between the internal space of the cleaning processing chamber 502 and the internal space of the liquid draining chamber 503.
- the substrate W carried in from the substrate carry-in port 523 formed on the upstream side wall of the cleaning processing chamber 502 is transported by the roller transport unit 504, and is supplied to the partition wall 521 that partitions the cleaning processing chamber 502 and the liquid draining chamber 503. It is transferred to the liquid draining chamber 503 through the formed substrate passage port 522. Then, the inside of the liquid draining chamber 503 is transported by the roller transport unit 504, and unloaded from the substrate unloading port 524 formed on the side wall on the downstream side of the liquid draining chamber 503.
- the substrate W is placed on the roller transport unit 504 with its surface facing upward.
- the surface of the substrate W is sequentially scanned by the water supply position P1 and the inert gas injection position P2.
- DIW is first supplied on the surface of the substrate W, and then nitrogen gas is injected after a predetermined time delay.
- FIG. 25 is a perspective view showing the configuration of the roller transport unit 504.
- the conveyance rollers 505 are arranged in parallel at substantially equal pitches in the X direction. Each transport roller 505 is synchronously rotated in the same direction by driving of a drive unit (not shown).
- Each conveyance roller 505 includes a roller shaft 515 that is inclined with respect to a horizontal plane in a plane (YZ plane) orthogonal to the X direction. Therefore, the conveyance path realized by the roller conveyance unit 504 is entirely inclined in the Y direction with respect to the horizontal plane.
- the substrate W is transported while maintaining an inclined posture.
- the inclination angle ⁇ (see FIG. 26) of the substrate W with respect to the horizontal plane is set to about 5 °, for example.
- Each conveying roller 505 includes, for example, a pair of left and right side rollers 516 that are fitted on the left and right sides of the roller shaft 515 so as to be able to rotate together with the roller shaft 515, and a center roller 517 provided at the center of the roller shaft 515. Is a so-called partially supported transport roller.
- Each individual side roller 516 has a flange 516A provided integrally with the side roller 516 on the outer side.
- the flange 516A prevents the substrate W to be transported from being laterally displaced, and prevents the substrate W from sliding along the inclined surface by the lower flange 516A.
- an O-ring (not shown) made of rubber or the like is externally fitted to each of the rollers 516 and 517, and the sliding of the O-ring prevents the substrate W from falling down more reliably.
- the water supply unit 500 is for supplying DIW to a plurality (for example, three in FIG. 24) of water nozzles 531 disposed in the cleaning processing chamber 502 and to each of the water nozzles 531.
- a water supply pipe (treatment liquid pipe) 533 and a water collecting pipe 532 to which the upstream ends of the individual water supply pipes 533 are connected are included.
- the plurality of water nozzles 531 are arranged, for example, at equal intervals along the X direction.
- Each water nozzle 531 is fixedly arranged with its discharge port 531A facing downward at a position facing the upper portion of the substrate W transported by the roller transport unit 504.
- the water collecting pipe 532 is a pipe for supplying DIW (an example of water) from the DIW supply source to the plurality of water supply pipes 533.
- An annular electrode 56 is fitted and fixed to the tip of each water nozzle 531, and a voltage with respect to the apparatus ground is applied to the electrode 56 by a power source 57 (see FIG. 3). .
- the water supply unit 500 further includes a soft X-ray irradiation unit (X-ray irradiation means) 534 for irradiating the DIW existing in the water collecting pipe 532 with soft X-rays.
- the soft X-ray irradiation unit 534 is attached to the water collecting pipe 532.
- the water collecting pipe 532 has a round tubular shape (cylindrical shape), and is formed using, for example, polyvinyl-chloride.
- a collecting valve 535 for opening and closing the water collecting pipe 532 is interposed in the middle of the water collecting pipe 532.
- an opening (not shown) is formed in a predetermined portion of the pipe wall downstream of the collecting.
- the soft X-ray irradiation unit 534 has the same configuration as the soft X-ray irradiation unit 62 (see FIG. 2) according to the first embodiment.
- the soft X-ray irradiation unit 534 is attached to the water collecting pipe 532 so as to close the opening of the water collecting pipe 532.
- the opening of the cover of the soft X-ray irradiation unit 534 corresponds with the opening of the water collecting pipe 532.
- the wall surface of the cover of the soft X-ray irradiation unit 534 (corresponding to the lateral wall 26A (see FIG.
- the high voltage unit of the soft X-ray irradiation unit 534 (corresponding to the high voltage unit 31 (see FIG. 2) of the soft X-ray irradiation unit 62 according to the first embodiment) is connected to the control device 40 (see FIG. 3). Yes.
- the collecting valve 535 is opened, DIW is supplied from the water collecting pipe 532 to each water supply pipe 533, and DIW is discharged from the discharge port 531A of each water nozzle 531.
- the gas knife nozzle 519 has a nitrogen gas as an example of an inert gas on the upper surface of the substrate W transported by the roller transport unit 504 in order to blow off DIW adhering to the upper surface of the substrate W. It is a nozzle for injecting. Another example of the inert gas is CDA (clean air with low humidity).
- the gas knife nozzle 519 has a slit injection port 519 ⁇ / b> A that is long in the Y direction, and can supply nitrogen gas over the entire width in the Y direction of the substrate W transported by the roller transport unit 504.
- the gas knife nozzle 519 is fixedly disposed in the liquid draining chamber 503 so that the slit injection port 519A faces the upper surface of the substrate W with a minute gap.
- Nitrogen gas from a nitrogen gas supply source is supplied to the gas knife nozzle 519 via an inert gas valve 511.
- the gas knife nozzle 519 injects nitrogen gas in a strip shape along the Y direction.
- the blowing direction of the inert gas from the slit injection port 519A of the gas knife nozzle 519 with respect to the upper surface of the substrate W is inclined in the direction opposite to the transport direction of the substrate W (left side shown in FIG. 24) with respect to the vertical direction. Yes.
- the inclination angle ⁇ (see FIG. 27) is in the range of 20 ° to 70 °, for example. *
- the soft X-ray irradiation apparatus 512 has a built-in soft X-ray generator 513 having an irradiation window 514. Soft X-rays generated in the irradiation window 514 are emitted (radiated) outside the soft X-ray irradiation apparatus 512.
- the irradiation angle (irradiation range) of soft X-rays from the irradiation window 514 is, for example, 130 °, and the soft X-rays irradiated from the irradiation window 514 have a wavelength of, for example, 0.13 to 0.41 nm.
- the soft X-ray generator 513 has the same configuration as the soft X-ray generator 25 (see FIG. 2) included in the soft X-ray irradiation unit 534, and the irradiation window 514 is the irradiation window 35 (see FIG. 2). It corresponds to.
- the soft X-ray irradiation device 512 is disposed on the downstream side of the gas knife nozzle 519 above the substrate W transported by the roller transport unit 504. Specifically, the soft X-ray irradiation apparatus 512 is disposed so that the irradiation window 514 faces the inert gas injection position P2.
- FIG. 26 is a cross-sectional view showing a state where the water supply unit 500 supplies DIW to the substrate W.
- FIG. 27 is a cross-sectional view showing a state where the soft X-ray irradiation apparatus 512 irradiates the upper surface of the substrate W with soft X-rays.
- DIW discharged from each discharge port 531A is supplied to the water supply position P1 on the upper surface of the substrate W, and flows along the inclined surface on the upper surface of the substrate W. As a result, a liquid film of DIW is formed on the upper surface of the substrate W.
- the DIW supply flow rate to each water nozzle 531 is set to a relatively large flow rate (for example, 1 to several tens L / min depending on the size of the glass substrate and the degree of cleaning). Therefore, the DIW discharged from each of the discharge ports 531A is in a continuous flow mode connected to both the discharge port 531A of the water nozzle 531 and the DIW liquid film on the upper surface of the substrate W. Further, DIW is in a liquid-tight state in the nozzle pipe of the water nozzle 531, the water collecting pipe 532, and the water supply pipe 533.
- soft X-rays from the soft X-ray irradiation unit 534 are irradiated into the water collecting pipe 532.
- the DIW irradiated portion in the water collecting pipe 532 (equivalent to the DIW irradiated portion 54 according to the first embodiment shown in FIG. 5). )
- Electrons are emitted from the water molecules by excitation of the water molecules.
- a plasma state in which a large amount of electrons and a large amount of positive ions of water molecules are mixed is formed in the DIW irradiated portion in the water collecting pipe 532.
- the DIW irradiated portion is connected to the DIW liquid film formed on the upper surface of the substrate W via the DIW.
- the electrons from the DIW irradiated portion in the water collecting pipe 532 are converted into a substrate by the potential difference between the DIW irradiated portion in the water collecting pipe 532 and the positively charged substrate W. It moves along the continuous flow of DIW toward the liquid film of DIW on the upper surface of W. Thus, the DIW liquid film on the upper surface of the substrate W has a large amount of electrons.
- the nitrogen gas from the slit injection port 519A of the gas knife nozzle 519 is connected to the discharge port 531A via a DIW liquid film (DIW continuous flow) formed on the upper surface of the substrate W. Sprayed on the liquid film).
- DIW liquid film DIW continuous flow
- the upper surface of the substrate W is irradiated with soft X-rays generated by the soft X-ray generator 513 of the soft X-ray irradiation apparatus 512.
- the case where the substrate W is processed using water (for example, DIW) in the cleaning processing chamber 502 has been described as an example.
- processing using a chemical solution and water is used in the cleaning processing chamber 502.
- the substrate W can be processed.
- the chemical liquid nozzle 506 is arranged on the upstream side of the water supply unit 500.
- a chemical solution from a chemical solution supply source is supplied to the chemical solution nozzle 506 via a chemical solution valve 508. That is, the chemical solution supply position P0 is set upstream of the water supply position P1.
- roller transport unit 504 that transports the substrate W in an inclined posture has been described as an example, but the roller transport unit 504 may transport the substrate W while maintaining the horizontal posture.
- the substrate processing apparatus 501 has been described by taking as an example an apparatus that cleans the upper surface (upper main surface) of the substrate W.
- the substrate processing apparatus 501 is a type of substrate processing apparatus that performs a cleaning process on both surfaces of the substrate.
- the present invention can be applied.
- the water supply unit 500 and the gas knife nozzle 519 are also arranged below the roller transport unit 504, respectively, and the water supply unit on the lower side at the water supply position P1. DIW is supplied to the lower surface of the substrate W by 500, and nitrogen gas is injected to the lower surface of the substrate W by the lower gas knife nozzle 519 at the inert gas injection position P2.
- 200, 220, 230, 250, 260, 300, 310, 400, 500 have been described as examples, but the present invention can also be applied to processing units other than the substrate W as processing objects.
- the processing object is a substrate container (container) 602, and a container cleaning device 601 for cleaning the processing object using a cleaning liquid (processing liquid) will be described as an example.
- FIG. 28 is a diagram showing a configuration of an article cleaning apparatus 601 according to the fourteenth embodiment of the present invention.
- FIG. 29 is a perspective view showing the configuration of the substrate container 602.
- the substrate container 602 is a container that accommodates the substrate W in a sealed state.
- An example of the substrate container 602 is FOSB (Front Opening Shipping Box).
- the FOSB is exclusively used to deliver the substrate W from the semiconductor wafer manufacturer to the semiconductor device manufacturer.
- the FOSB accommodates a plurality of unprocessed substrates W and prevents damage to the substrates W while maintaining the cleanliness of these substrates W.
- the article cleaning apparatus 601 includes a mounting table 607 for mounting the container main body 603 of the substrate container 602, and water for supplying DIW as an example of a cleaning liquid to the substrate container 602.
- a supply unit (processing liquid supply device) 600 is provided.
- the water supply unit 600 employs the same configuration as the water supply unit 100 (see FIG. 1) according to the first embodiment. Therefore, the same reference numerals are given to FIG. 28 and the description is omitted.
- the water nozzle 61 of the water supply unit 600 is disposed above the container main body 603 mounted on the mounting table 607 with its discharge port 53 facing downward.
- the substrate container 602 includes a bottomed box-shaped container body 603 having an opening 603A on the side, and a lid 604 for opening and closing the opening 603A of the container body 603 (FIG. 28 shows a closed state of the lid 604).
- a multi-stage container support shelf 606 attached to the inner wall of the container body 603, and a multi-stage lid support shelf 605 attached to the lid 604.
- the substrate W is put in and out of the container main body 603 through the opening 603A.
- the container body 603 and the lid 604 are each formed using a resin material such as polyvinyl-chloride.
- the container main body 603 has a substantially cubic outer shape, and as shown in FIG. 28, the opening side may have a slightly larger diameter than the bottom side. In this case, the upper surface of the container body 603 has an inclined surface.
- DIW is supplied from the water supply unit 600 to the outer wall of the container body 603 of the substrate container 602. Specifically, the water valve 14 is opened, and DIW flowing through the water supply pipe 13 is supplied to the water nozzle 61. Accordingly, DIW is discharged downward from the discharge port 53 of the water nozzle 61 toward the upper surface of the outer wall of the container body 603.
- the control device 40 generates soft X-rays in the soft X-ray generator 25 (see FIG. 2) and irradiates the soft X-rays toward the inside of the first nozzle pipe 51 of the water nozzle 61. Thereby, soft X-rays are irradiated to DIW which distribute
- the DIW supplied to the upper side surface of the outer wall of the container main body 603 flows down along the upper side surface and the bottom surface formed of inclined surfaces. As a result, a DIW liquid film is formed on the outer wall of the container body 603. By this liquid film, dirt or dust adhering to the outer wall of the container body 603 is washed away.
- the DIW supply flow rate to the water nozzle 61 is set to a relatively large flow rate (for example, 1 to 10 L / min depending on the size of the substrate container 602). Therefore, the mode of DIW discharged from the discharge port 53 of the water nozzle 61 is a continuous flow mode connected to both the discharge port 53 and the outer wall of the container body 603. Therefore, a DIW liquid film is formed on the outer wall of the container body 603. By this liquid film, the liquid film 63 formed on the outer wall of the container body 603 and the DIW irradiation portion 54 are connected via the DIW. Further, DIW is in a liquid-tight state in the nozzle pipe of the water nozzle 61.
- the potential difference between the DIW irradiation portion 54 and the outer wall of the container main body 603 that is positively charged causes an electron from the DIW irradiation portion 54.
- it moves along the continuous flow DIW toward the DIW liquid film in contact with the outer wall of the container body 603.
- the DIW liquid film in contact with the outer wall of the container body 603 has a large amount of electrons.
- the DIW liquid film 63 and the DIW irradiated portion 54 are connected via the DIW.
- charging of the container body 603 during the cleaning process can be prevented. Moreover, even if the container main body 603 is charged before the cleaning process, the charge on the container main body 603 can be removed (that is, static elimination).
- the case where the container main body 603 is cleaned has been described as an example.
- the cleaning method is similarly adopted.
- the lid 604 and the support shelves 605 and 606 can be subjected to a cleaning process while removing electricity from the lid 604 and the support shelves 605 and 606.
- the FOSB has been described as an example of the substrate container 602
- the FOUP Front-Opening-Unified
- the substrate container 602 other types of substrate containers such as FOUP (Front Opening Unified Unified Pod), SMIF (Standard Mechanical Interface) pod, OC (Open Cassette) can be exemplified.
- the container is not limited to the one that accommodates the substrate W.
- a medium container that accommodates a disk-shaped medium such as a CD, a DVD, or a blue disk, or an optical component such as a lens, a mirror, or a diffraction grating.
- the component container which accommodates can be made into a process target object.
- a static elimination test is performed to confirm that the processing object such as a silicon wafer, a glass substrate, and a container can be eliminated by supplying DIW (an example of water) from a water supply unit containing a soft X-ray irradiation unit. went.
- DIW an example of water
- FIG. 30 is a diagram for explaining a test apparatus 651 used in the static elimination test.
- the test apparatus 651 includes a resin-made bottomed container 652, a charged body holding base 653 that holds the charged body E in the container 652, and the charged body E that is held by the charged body holding base 653.
- a water supply unit 654 for supplying the treatment liquid a charging plate monitor 655 for measuring the charge amount of the charging body E while charging the charging body E held on the charging body holding base 653,
- the charging plate monitor 655 has a metal plate 671 that is electrically connected to the charged body E.
- An example of the charging plate monitor 655 is CPM210 manufactured by Ion Systems, Inc.
- an example of the recorder 656 is HIOKI8841 manufactured by Hioki Electric Co., Ltd.
- the water supply unit 654 includes a water nozzle 661, a soft X-ray irradiation unit 662 for irradiating the DIW (an example of water) flowing through the water nozzle 661 with soft X-rays, and a DIW tank 670 for the water nozzle 661. And a water supply pipe 663 for supplying DIW.
- the soft X-ray irradiation unit 662 is attached to the water supply pipe 663.
- the water supply pipe 663 is provided with a valve 664 for adjusting the opening / closing and opening of the water supply pipe 663.
- the water nozzle 661 includes an ionization chamber 665, an inlet portion 666 having an inlet 666A for allowing DIW to flow into the ionization chamber 665, and an outlet portion 667 having an outlet 667A of DIW flowing through the ionization chamber 665.
- the ionization chamber 665 is formed in a rectangular flat shape, and the internal space of the ionization chamber 665 is set to a rectangular space having a length of about 100 mm in the flow direction, a width of about 5 mm in the flow direction, and a depth of about 60 mm in the flow direction. .
- the soft X-ray irradiation unit 662 adopts the same configuration as the soft X-ray irradiation unit 62 according to the first embodiment.
- the soft X-ray irradiation unit 662 has a soft X-ray generator corresponding to the soft X-ray generator 25 (see FIG. 2) according to the first embodiment.
- An example of the soft X-ray generator is a soft X-ray ionizer (L9490, manufactured by Hamamatsu Photonics).
- the diameter of the round opening corresponding to the second opening 28 is, for example, 17 mm.
- a rectangular metal plate (130 mm ⁇ 93 mm ⁇ thickness 1 mm) is used as the charged body E to be measured.
- the substrate holding table 653 holds the charged body E in an inclined posture inclined at a predetermined angle with respect to the horizontal plane.
- the charged body E is insulated from the container 652 by a block 668 made of PTFE (polytetrafluoroethylene) contained in the substrate holding table 653.
- the distance between the upper end of the charged body E and the outlet 667A is, for example, 55 mm.
- Second step Adjusting the valve 664, DIW (conductivity: 1 ⁇ S / cm or less in this case) is dropped in the form of droplets (discontinuous flow) from the outlet 667A of the water nozzle 661.
- a droplet form means a state where a droplet is not connected to the next droplet.
- Second step The charged body E is charged via the metal plate 671 of the charging plate monitor 655, and the soft X-ray generator of the soft X-ray irradiation unit 662 is turned on / off.
- Table 1 shows the experimental results when DIW was dropped into droplets. As shown in Table 1, the time (static elimination time) during which the potential of the charged body E decays from +/ ⁇ 4.5 kV to +/ ⁇ 3.0 kV is almost constant regardless of whether the soft X-ray generator is on or off. It was. From the experimental results shown in Table 1, it can be seen that when DIW is dropped into droplets, the charged body E is hardly neutralized.
- Table 2 shows the experimental results when DIW was allowed to flow down continuously. As shown in Table 2, when the DIW flow rate is 0.774 L / min and 0.08 L / min, the potential of the charged body E is +/- 1 kV ⁇ +/ ⁇ when the soft X-ray generator is turned on. Time to decay to 0.1kV (static elimination time) has been shortened. The static elimination time in this case is just over 1 second. From the experimental results shown in Table 2, it can be seen that when DIW is allowed to flow down in a continuous flow, the charge removal performance is improved.
- Table 3 shows the experimental results when the distance from the outlet of the water nozzle 661 to the charged body E is changed while allowing DIW to flow down in a continuous flow.
- Table 3 shows the experimental results when the distance from the outlet of the water nozzle 661 to the charged body E is changed while allowing DIW to flow down in a continuous flow.
- this distance is 3000 mm, the charge can be removed in 1 to 2 seconds. From this, it can be seen that the distance from the outlet of the water nozzle 661 to the charged body E does not significantly affect the charge removal performance.
- the principle of static elimination that neutralizes the processing object by supplying DIW from the water supply unit incorporating the soft X-ray irradiation unit is estimated as follows. That is, electrons are emitted from water molecules excited by soft X-ray irradiation, and this irradiated portion is in a plasma state in which positive ions and electrons of water molecules excited by soft X-rays are mixed.
- the potential difference between the DIW irradiated part and the charged object to be processed is directed toward the object to be charged which is positively charged with electrons in the DIW irradiated part.
- the object to be processed which is moved and positively charged is neutralized.
- electrons move from the charged object to be processed toward positive ions in the irradiated part of the DIW, and the object to be negatively charged is neutralized.
- FIG. 31 is a diagram showing a configuration of a substrate processing apparatus 701 according to the fifteenth embodiment of the present invention.
- the substrate processing apparatus 701 is a single-wafer type apparatus used for processing a surface (processing target surface) of a circular semiconductor wafer (silicon wafer) as an example of the substrate W with a processing liquid (chemical solution and water). .
- a processing liquid chemical solution and water.
- water is used for rinsing the substrate W performed after the chemical treatment.
- an oxide film or the like is formed on the surface of the substrate W to be processed.
- a substrate processing apparatus 701 includes a spin chuck (substrate holding means) 704 that rotates a substrate W held in a horizontal posture in a processing chamber 703 partitioned by a partition wall 702, and a substrate W held by the spin chuck 704.
- Soft X-rays are applied to the surface of a substrate W held by a spin nozzle 704 and a water nozzle (water supply means) 705 for discharging DIW (deionized water, pure water) as an example of water onto the surface (upper surface).
- DIW deionized water, pure water
- the spin chuck 704 for example, a sandwich type is adopted.
- the spin chuck 704 includes a spin motor 708, a spin shaft 709 integrated with a drive shaft of the spin motor 708, and a disk-shaped spin base attached substantially horizontally to the upper end of the spin shaft 709. 710 and a plurality of clamping members 711 provided at a plurality of positions on the peripheral edge of the spin base 710 at substantially equal intervals.
- the spin chuck 704 rotates the spin base 710 by the rotational driving force of the spin motor 708 in a state where the substrate W is sandwiched by the plurality of sandwiching members 711, so that the substrate W is placed in a substantially horizontal posture. In this state, it can be rotated around the rotation axis C together with the spin base 710.
- the spin chuck 704 is not limited to a sandwich type, and for example, the back surface of the substrate W is vacuum-sucked to hold the substrate W in a horizontal posture and further rotate around the vertical rotation axis C in that state.
- a vacuum chucking type vacuum chuck capable of rotating the held substrate W may be employed.
- the water nozzle 705 is, for example, a straight nozzle that discharges DIW in a continuous flow state, and is fixedly disposed above the spin chuck 704 so that the discharge port faces the vicinity of the rotation center of the substrate W.
- a water supply pipe 713 to which DIW from a DIW supply source is supplied is connected to the water nozzle 705.
- a water valve (water supply means) 714 for switching supply / stop of supply of DIW from the water nozzle 705 is interposed in the middle of the water supply pipe 713.
- the chemical nozzle 707 is, for example, a straight nozzle that discharges the chemical in a continuous flow state, and is fixedly disposed above the spin chuck 704 with its discharge port directed toward the vicinity of the rotation center of the substrate W.
- a chemical solution supply pipe 715 to which a chemical solution from a chemical solution supply source is supplied is connected to the chemical solution nozzle 707.
- a chemical solution valve 716 for switching supply / stop of supply of the chemical solution from the chemical solution nozzle 707 is interposed in the middle of the chemical solution supply pipe 715.
- the chemical nozzle 707 does not need to be fixedly arranged with respect to the spin chuck 704.
- the chemical nozzle 707 is attached to an arm that can be swung in a horizontal plane above the spin chuck 704, and the arm is swung.
- a so-called scan nozzle form in which the position of the chemical solution on the surface of the substrate W is scanned may be employed.
- a support shaft 717 extending in the vertical direction is disposed on the side of the spin chuck 704.
- An arm 718 extending in the horizontal direction is coupled to the upper end of the support shaft 717, and a soft X-ray irradiation head 706 is attached to the tip of the arm 718.
- the support shaft 717 includes a swing drive mechanism (moving means) 719 for rotating the support shaft 717 around the axis, and a lift drive mechanism (for moving the support shaft 717 up and down along the axial direction). Moving means) 720.
- the arm 718 By inputting a driving force from the swing drive mechanism 719 to the support shaft 717 and rotating the support shaft 717 within a predetermined angular range, the arm 718 is moved above the substrate W held by the spin chuck 704.
- the support shaft 717 is swung as a fulcrum.
- the soft X-ray irradiation head 706 is moved to a position including the rotation axis C of the substrate W (a position facing the rotation center of the substrate W) and a home position set to the side of the spin chuck 704. Can be moved between.
- the soft X-ray irradiation head 706 is brought close to the surface of the substrate W held by the spin chuck 704 by inputting a driving force to the support shaft 717 from the lifting drive mechanism 720 and moving the support shaft 717 up and down. It is moved up and down between a position (a position indicated by a two-dot chain line in FIG. 31) and a retreat position (a position indicated by a solid line in FIG. 31) for retreating above the substrate W.
- the proximity position is a predetermined distance (for example, the distance between the surface of the substrate W held by the spin chuck 704 and the lower surface of the soft X-ray irradiation head 706 (the lower surface of the lower wall 726A) is 1 to 30 mm (for example, It is set to a position that will be about 10mm).
- An opening 721 for carrying the substrate W in and out of the processing chamber 703 is formed on the side wall (one of the plurality of side walls) of the partition wall 702.
- a transfer robot (not shown) facing the opening 721 outside the processing chamber 703 accesses the hand into the processing chamber 703 through the opening 721.
- the unprocessed substrate W can be placed on the spin chuck 704, or the processed substrate W can be removed from the spin chuck 704.
- the opening 721 is opened and closed by a shutter 722.
- the shutter 722 has a closed position (shown by a solid line in FIG. 31) covering the opening 721 and an open position (open by a two-dot chain line in FIG. 31) covering the opening 721 by a shutter lifting mechanism (not shown) coupled to the shutter 722. As shown).
- FIG. 32 is a schematic cross-sectional view of the soft X-ray irradiation head 706.
- the soft X-ray irradiation head 706 includes an X-ray generator 725, a cover 726 made of, for example, polyvinyl chloride (PVC) covering the periphery of the X-ray generator 725, and a gas for supplying gas to the inside of the cover 726. And a nozzle (gas supply means) 727.
- the cover 726 is in the shape of a vertically long rectangular box that surrounds the X-ray generator 725 with a space from the X-ray generator 725.
- the cover 726 has a horizontal plate-like lower wall 726A next to the X-ray generator 725. For example, a circular opening 728 is formed in a portion facing the irradiation window 735 described above.
- the X-ray generator 725 emits (radiates) soft X-rays used to ionize DIW on the substrate W.
- the X-ray generator 725 includes a case body 729, a vertically long X-ray tube 730 for generating X-rays, and a high voltage unit 731 that supplies a high voltage to the X-ray tube 730.
- the case body 729 is a vertically long rectangular tube that accommodates the X-ray tube 730 and the high voltage unit 731 and is made of a material having conductivity and thermal conductivity (for example, a metal material such as aluminum). Is formed.
- the high voltage unit 731 inputs, for example, a high potential drive voltage of ⁇ 9.5 kV to the X-ray tube 730.
- the high voltage unit 731 is supplied with a voltage from a power source (not shown) through a feed line 743 drawn out of the cover 726 through a through hole 742 formed in the cover 726.
- the X-ray tube 730 is made of a glass or metal cylindrical vacuum tube, and is arranged so that the tube direction is vertical. A lower end portion (opening end portion) of the X-ray tube 730 is opened to form a circular opening 741. The upper end portion of the X-ray tube 730 is closed and serves as a stem 732.
- a filament 733 serving as a cathode and a target 736 serving as an anode are disposed so as to face each other.
- the X-ray tube 730 contains a filament 733 and a focus 734. Specifically, a filament 733 as a cathode is disposed on the stem 732. The filament 733 is electrically connected to the high voltage unit 731. The filament 733 is surrounded by a cylindrical focus 734.
- the open end of the X-ray tube 730 is closed by a plate-shaped irradiation window 735 that has a vertical posture.
- the irradiation window 735 has a disk shape, for example, and is fixed to the wall surface of the open end of the X-ray tube 730 by silver brazing.
- As the material of the irradiation window 735 a substance having a small atomic weight that is easy to transmit soft X-rays having a low transmission power is used, and beryllium (Be) is employed in this embodiment.
- the thickness of the irradiation window 735 is set to about 0.3 mm, for example.
- a metal target 736 is formed on the inner surface 735A of the irradiation window 735 by vapor deposition.
- a metal having a high atomic weight and a high melting point such as tungsten (W) or tantalum (Ta) is used.
- the filament 733 When the drive voltage from the high voltage unit 731 is applied to the filament 733 that is a cathode, the filament 733 emits electrons. The electrons emitted from the filament 733 are converged at the focus 734 to become an electron beam, and soft X-rays are generated by colliding with the target 736. The generated soft X-rays are emitted (radiated) downward from the irradiation window 735.
- the irradiation angle (irradiation range) of soft X-rays from the irradiation window 735 is a wide angle (for example, 130 °) as shown in FIG.
- the wavelength of soft X-rays irradiated from the irradiation window 735 to the outside of the soft X-ray irradiation head 706 is, for example, 0.13 to 0.41 nm.
- the irradiation window 735 is a generation source that generates soft X-rays. Therefore, if the irradiation window 735 is clouded due to adhesion of water droplets or the like to the outer surface 735B, there is a possibility that the irradiation of soft X-rays from the irradiation window 735 may be hindered.
- the entire outer surface 735B of the irradiation window 735 is covered with a polyimide resin film 738 having water repellency.
- the reason why the outer surface 735B of the irradiation window 735 is covered with the film 738 is to protect the irradiation window 735 made of beryllium having poor acid resistance from an acid contained in a treatment liquid such as water.
- the polyimide resin film 738 has a polyamic acid type polyimide resin.
- the film thickness of the polyimide resin film 738 is 50 ⁇ m or less, and preferably about 10 ⁇ m. Since the film 738 has water repellency, moisture can be excluded from the outer surface 735B of the irradiation window 735.
- the polyimide resin film 738 has high chemical stability, the outer surface 735B of the irradiation window 735 can be protected for a long period of time.
- the reason why the X-ray generator 725 is covered with the cover 726 is to protect the X-ray generator 725 from moisture. Since the X-ray generator 725 includes the high voltage unit 731 as described above, if the atmosphere around the X-ray generator 725 contains a large amount of moisture, a high voltage is generated when soft X-rays are generated. May leak. Therefore, the X-ray generator 725 is covered with a cover 726 in order to prevent moisture from entering the X-ray generator 725.
- the discharge port of the gas nozzle 727 opens on the upper wall of the cover 726.
- Gas from a gas supply source (not shown) is supplied to the gas nozzle 727 via a gas valve (gas supply means) 737.
- the gas nozzle 727 is supplied with a gas having a temperature higher than room temperature (for example, 25 ° C.) (for example, 60 ° C.). Therefore, the gas nozzle 727 discharges a gas having a high temperature (for example, 60 ° C.).
- Examples of the gas discharged from the gas nozzle 727 include CDA (clean air with low humidity) and inert gas such as nitrogen gas.
- the gas discharged from the gas nozzle 727 is supplied into the cover 726.
- the lower wall 726A of the cover 726 is formed with an opening 728 for transmitting soft X-rays from the irradiation window 735. Therefore, in combination with the supply of gas into the cover 726, that is, in the space between the cover 726 and the outer wall of the X-ray generator 725, an air flow toward the opening 728 is formed. Therefore, the atmosphere outside the cover 726 can be suppressed or prevented from entering the cover 726 through the opening 728, and moisture can be further prevented from entering the atmosphere around the X-ray generator 725. be able to.
- the water repellent coating 738 is formed on the outer surface 735B of the irradiation window 735. Therefore, moisture is not deposited in the form of a film on the front surface of the irradiation window 735, but becomes fine water droplets. Since the water droplets adhering to the outer surface 735B of the irradiation window 735 are in contact with the outer surface 735B at a high contact angle, it can be said that the water droplets easily move on the outer surface 735B.
- the gas supplied into the cover 726 reaches the outer surface of the irradiation window 735 through the space 739 between the X-ray generator 725 and the cover 726.
- the water droplets adhering to the outer surface 735B of the irradiation window 735 move in response to the airflow formed in the space 739. Thereby, water droplets can be favorably eliminated from the outer surface 735B of the irradiation window 735, and the irradiation window 735 can be reliably prevented from being fogged. Further, since the gas supplied into the cover 726 is at a high temperature, water droplets adhering to the outer surface 735B of the irradiation window 735 can be removed by evaporation, so that the irradiation window 735 can be further clouded. It can be surely prevented.
- a sheet-like heater (heating member) 744 is disposed in the vicinity of the periphery of the opening 728 on the lower wall 726A of the cover 726.
- the heater 744 is formed by printing a resistor on a sheet.
- the heater 744 is heated by energization of the heater 744, the surrounding members are warmed, and the irradiation window 735 is also warmed. Therefore, water droplets adhering to the outer surface 735B of the irradiation window 735 can also be removed by evaporation, and thereby the irradiation window 735 can be more reliably prevented from being fogged.
- FIG. 33 is a plan view showing an arrangement position of the soft X-ray irradiation head 706.
- the soft X-ray irradiation head 706 draws an arc-shaped locus intersecting the rotation direction of the substrate W on the surface of the substrate W held by the spin chuck 704. It is provided to be movable. When the soft X-ray irradiation head 706 irradiates the surface of the substrate W with soft X-rays, the soft X-ray irradiation head 706 is disposed at a close position. And, during irradiation with soft X-rays, it remains arranged in the proximity position. The arrangement position of the soft X-ray irradiation head 706 shown by a solid line in FIG.
- the arrangement position of the soft X-ray irradiation head 706 indicated by a two-dot chain line in FIG. 33 is the edge proximity position, and the proximity position including the peripheral edge of the surface of the substrate W in the irradiation area from the irradiation window 735 of the soft X-ray irradiation head 706. It is.
- FIG. 34 is a block diagram showing an electrical configuration of the substrate processing apparatus 701.
- the substrate processing apparatus 701 further includes a control device (control means) 740 having a configuration including a microcomputer.
- a spin motor 708, a high voltage unit 731, a swing drive mechanism 719, a lift drive mechanism 720, a chemical solution valve 716, a water valve 714, a gas valve 737, a heater 744, and the like are connected to the control device 740 as control targets.
- the gas valve 737 is always opened and the heater 744 is driven while the substrate processing apparatus 701 is powered on.
- the heater 744 is heated and raised to about 100 ° C., for example.
- FIG. 35 is a process diagram showing a processing example of the substrate W executed in the substrate processing apparatus 701.
- the rinse process is performed after the chemical process.
- the surface of the substrate W is irradiated with soft X-rays from the soft X-ray irradiation head 706.
- the shutter 722 When processing the substrate W, the shutter 722 is changed from the closed state to the open state. Thereby, the opening 721 is opened. Thereafter, an unprocessed substrate W is carried into the processing chamber 703 through the opening 721 by a transfer robot (not shown) (step S701), and delivered to the spin chuck 704 with the surface thereof facing upward. . At this time, the soft X-ray irradiation head 706 is disposed at the home position so as not to hinder the loading of the substrate W. After the hand of the transfer robot has retreated from the processing chamber 703, the shutter 722 is closed.
- the control device 740 controls the spin motor 708 to start the rotation of the substrate W by the spin chuck 704 (step S702).
- the rotation speed of the substrate W is increased to a predetermined liquid processing speed (for example, 500 rpm), and then maintained at the liquid processing speed.
- the controller 740 opens the chemical liquid valve 716 and discharges the chemical liquid from the chemical liquid nozzle 707 toward the rotation center of the surface of the substrate W (S703: supply of chemical liquid).
- the chemical solution supplied to the surface of the substrate W receives a centrifugal force due to the rotation of the substrate W and flows toward the periphery of the substrate W (spreads over the entire area of the substrate W). As a result, the entire surface of the substrate W is treated with the chemical solution.
- control device 740 closes the chemical solution valve 716 and stops the supply of the chemical solution from the chemical solution nozzle 707.
- control device 740 opens the water valve 714 and discharges DIW from the water nozzle 705 toward the rotation center of the surface of the substrate W in a rotating state (step S704). Further, the control device 740 controls the swing drive mechanism 719 to move the soft X-ray irradiation head 706 from the home position set on the side of the spin chuck 704 to above the spin chuck 704 and then drive it up and down. By controlling the mechanism 720, the soft X-ray irradiation head 706 is disposed at a close position close to the surface of the substrate W.
- control device 740 controls the high voltage unit 731 to generate soft X-rays in the X-ray generator 725 of the soft X-ray irradiation head 706 and irradiate downward from the irradiation window 735 (step S704). .
- the DIW supplied to the surface of the substrate W flows toward the periphery of the substrate W due to the centrifugal force generated by the rotation of the substrate W (spreads over the entire area of the substrate W). Thereby, the chemical solution adhering to the surface of the substrate W is washed away by DIW (rinsing process).
- FIG. 36 is an illustrative view for explaining the rinsing process.
- the soft X-ray irradiation by the soft X-ray irradiation head 706 is continuously executed in parallel with the supply of DIW to the substrate W.
- the soft X-ray irradiation head 706 is reciprocated between the center proximity position and the edge proximity position.
- the irradiation position on the surface of the substrate W to which the soft X-rays from the soft X-ray irradiation head 706 are guided crosses the rotation direction of the substrate W within a range from the rotation center of the substrate W to the peripheral edge of the substrate W. It moves back and forth while drawing an arcuate trajectory. As a result, soft X-rays can be irradiated over the entire surface of the substrate W.
- FIG. 37 is an illustrative view showing a state in the vicinity of the surface of the substrate W in the rinsing process.
- the surface of the substrate W is irradiated with soft X-rays while DIW is supplied to the surface of the substrate W.
- the soft X-rays are applied to the DIW flowing toward the periphery of the surface of the substrate W.
- DIW flowing on the surface of the substrate W forms a liquid film of DIW in contact with the surface on the surface of the substrate W.
- the surface portion of this liquid film (the portion shaded in FIG. 37) ) Is irradiated with soft X-rays.
- the control device 740 closes the water valve 714 and stops supplying DIW (step S705). Thereby, the rinsing process ends.
- the control device 740 controls the high voltage unit 731 to stop the soft X-ray irradiation from the irradiation window 735 of the soft X-ray irradiation head 706 (step S706). . In addition, the control device 740 controls the swing drive mechanism 719 and the lift drive mechanism 720 to return the soft X-ray irradiation head 706 to the home position. It should be noted that the X-ray irradiation on the surface of the substrate W by the soft X-ray irradiation head 706 is executed until immediately before the start of the spin dry described below.
- the control device 740 controls the spin motor 708 to increase the rotation speed of the substrate W to a spin dry rotation speed (for example, 2500 rpm).
- a spin dry rotation speed for example, 2500 rpm.
- the rotation of the spin chuck 704 is stopped. Thereafter, the shutter 722 is changed from the closed state to the open state, and the opening 721 is opened. Then, the processed substrate W is unloaded by the transfer robot (not shown) through the opening 721 (step S708).
- the liquid film of DIW formed on the surface of the substrate W is irradiated with soft X-ray X-rays.
- the DIW liquid film irradiated with soft X-rays electrons are emitted from the water molecules by excitation of the water molecules, resulting in a plasma state in which a large amount of electrons and a large amount of positive ions of the water molecules coexist. Is formed.
- FIG. 38 is a cross-sectional view for explaining a test apparatus 902 used for these tests.
- the test apparatus 902 has a rectangular box-shaped water tank 903 for storing DIW and an X-ray irradiation for irradiating soft X-rays to the DIW attached to the water tank 903 from above and stored in the water tank 903.
- the water tank 903 has a width of 100 mm, a depth of 100 mm, and a height of 100 mm.
- the bottom wall, the four side walls, and the top wall of the water tank 903 are each made of a PVC plate having a thickness of 5 mm.
- the X-ray irradiation head 904 is a soft X-ray ionizer (manufactured by Hamamatsu Photonics) having a configuration equivalent to that of the X-ray generator 725 shown in FIG. 32 and the like, and is arranged with the irradiation window 735 facing downward. .
- An opening 905 is formed in the upper wall of the water tank 903, and the lower end portion of the soft X-ray irradiation head 904 including the irradiation window 735 enters the water tank through the opening 905.
- the lower surface of the irradiation window of the soft X-ray irradiation head 904 is located 5 mm below the lower surface of the upper wall of the water tank 903.
- a silicon rubber packing 906 is fitted in a gap between the side edge of the opening 905 on the upper wall of the water tank 903 and the lower end of the soft X-ray irradiation head 904, and thereby the soft X-ray irradiation head 904 is fixed to the upper wall of the water tank 903.
- a stainless steel square (80 cm ⁇ 80 cm) mesh 911, 912 (having a lattice shape and forming a plate shape as a whole) is used as a measurement object in place of a substrate such as a silicon wafer or a glass substrate.
- Two meshes 911 and 912 are attached to the water tank 903 in a horizontal posture with a space in the vertical direction.
- the distance between the upper mesh 911 and the outer surface 735B of the irradiation window 735 of the soft X-ray irradiation head 904 is, for example, 10 mm.
- the distance between the lower mesh 912 and the outer surface 735B of the irradiation window 735 of the soft X-ray irradiation head 904 is, for example, 25 mm.
- a drain nipple 907 and a water injection nipple 908 are attached to the side wall of the water tank 903.
- the nipples 907 and 908 respectively penetrate the inside and outside of the side wall of the water tank 903.
- the drain nipple 907 is disposed at a position 20 mm from the lower surface of the upper wall of the water tank 903 (that is, a position 5 mm below the upper mesh 911 and 10 mm above the lower mesh 912).
- the water injection nipple 908 is disposed below the lower mesh 912 with a large gap.
- a water injection hose (not shown) is connected to the water injection nipple 908, and a water discharge hose (not shown) is connected to the water discharge nipple 907. Water is supplied to the water tank 903 via the water injection hose and discharged through the drainage nipple 907 and the drainage hose.
- the lower mesh 912 is connected to a metal plate (not shown) of a charged plate monitor CPM (CPM210, manufactured by Ion Systems Inc., USA) with a high voltage cable.
- CPM charged plate monitor
- the charge removal time when charged to +/- 1 kV was within 1 second, and the charge removal time when charged to +/- 5 kV was about 2 seconds.
- This static elimination test shows that the charged body (lower mesh 912) in the DIW can be satisfactorily eliminated by irradiating the DIW with soft X-rays.
- (2) Ionization test A superinsulation resistance meter (Model 4329A manufactured by Yokogawa Hewlett-Packard Co., Ltd.) was connected between the upper and lower meshes 911, 912, and two meshes 911, 912 depending on the presence or absence of soft X-ray irradiation. The change in electrical resistance was measured.
- DIW is accumulated in the water tank 903 up to the height of the nipple 907 for drainage. Then, with the soft X-ray irradiation head 904 turned off, a voltage of 10 V was applied to the lower mesh 912, and the electrical resistance between the two meshes 911 and 912 was measured. Next, while applying a voltage of 10 V to the lower mesh 912, the soft X-ray irradiation head 904 is turned on, and the DIW stored in the water tank 903 is irradiated with soft X-rays, and between the two meshes 911, 912 The electrical resistance was measured.
- the electrical resistance during soft X-ray irradiation decreased from 1 ⁇ 10 11 ( ⁇ ) before soft X-ray irradiation to 1 ⁇ 10 9 ( ⁇ ).
- This ionization test shows that DIW can be ionized by irradiating DIW with soft X-rays.
- DIW can be ionized by irradiating DIW with soft X-rays. It can be seen that due to the ionization of the IW, the charged body in contact with the DIW can be well discharged.
- FIG. 39 is a diagram schematically showing the configuration of the substrate processing apparatus 820 according to the sixteenth embodiment of the present invention. Parts common to the substrate processing apparatus 820 according to the fifteenth embodiment are denoted by the same reference numerals as in FIGS. 31 to 37, and description thereof is omitted.
- the main difference between the substrate processing apparatus 820 and the substrate processing apparatus 701 is that a water nozzle (water supply means) 821 adopting a scan nozzle form is provided in place of the fixed water nozzle 705.
- the water nozzle 821 is, for example, a straight nozzle that discharges DIW in a continuous flow state.
- the water nozzle 821 is attached to the tip of a water arm 823 that extends substantially horizontally with its discharge port facing downward.
- a water supply pipe 713 is connected to the water nozzle 821.
- the water arm 823 is provided so as to be able to turn around a predetermined swing axis extending in the vertical direction.
- the water arm 823 is coupled to a water arm swing drive mechanism 822 for swinging the water arm 823 within a predetermined angle range.
- the water nozzle 821 is positioned between the position on the rotation axis C of the substrate W (position facing the rotation center of the substrate W) and the home position set to the side of the spin chuck 704. It is moved with.
- the water arm swing driving mechanism 822 is controlled, and the water nozzle 821 is reciprocated between the rotation center of the substrate W and the peripheral edge.
- the supply position on the surface of the substrate W to which DIW from the water nozzle 821 is guided is an arc shape that intersects the rotation direction of the substrate W within a range from the rotation center of the substrate W to the peripheral edge of the substrate W.
- the swing positions of the water nozzle 821 and the soft X-ray irradiation head 706 are controlled so that the water nozzle 821 and the soft X-ray irradiation head 706 do not interfere with each other.
- FIG. 40 is a diagram schematically showing the configuration of the substrate processing apparatus 830 according to the seventeenth embodiment of the present invention. Portions common to the substrate processing apparatus 701 according to the fifteenth embodiment are denoted by the same reference numerals as in FIGS. 31 to 37, and description thereof is omitted.
- the main difference between the substrate processing apparatus 830 and the substrate processing apparatus 701 is that an integrated head 831 having a water nozzle and a soft X-ray irradiation head is provided.
- the integrated head 831 includes a water nozzle (water supply means) 833 having a configuration equivalent to that of the water nozzle 821 of the second embodiment and a soft X-ray having a configuration equivalent to that of the soft X-ray irradiation head 706 of the first embodiment.
- An irradiation unit (X-ray irradiation means) 834 and a holder 835 for holding a water nozzle 833 and a soft X-ray irradiation unit 834 are provided.
- the integrated head 831 is attached to the tip of an arm 832 that extends substantially horizontally.
- the arm 832 is provided so as to be able to turn around a predetermined swing axis extending in the vertical direction. By swinging the arm 832, the integrated head 831 moves between a position on the rotation axis C of the substrate W (a position facing the rotation center of the substrate W) and a home position set to the side of the spin chuck 704. It is moved with.
- the integrated head 831 is reciprocated between the rotation center of the substrate W and the peripheral edge.
- the supply position on the surface of the substrate W to which DIW from the water nozzle 833 is guided and the irradiation position on the surface of the substrate W to which soft X-rays from the soft X-ray irradiation unit 834 are guided are the rotation center of the substrate W.
- FIG. 41 is a diagram schematically showing the configuration of the substrate processing apparatus 840 according to the eighteenth embodiment of the present invention.
- the substrate processing apparatus 840 includes a soft X-ray irradiation head (X-ray irradiation means) 841 instead of the soft X-ray irradiation head 706 of the first embodiment.
- the main difference between the soft X-ray irradiation head 841 and the soft X-ray irradiation head 706 is that it projects outward from the lower edge of the side wall of the cover 726 in the horizontal direction (projects from the cover 726 to the side). This is a point provided with a shielding plate portion (shielding member) 842.
- the shielding plate portion 842 has a square ring plate shape, and the lower surface thereof has a horizontal plane continuous with the lower wall 726A of the cover 726. During the rinsing process, the shielding plate portion 842 is disposed to face the surface of the substrate W held by the spin chuck 704. Soft X-rays emitted from the irradiation window 735 are placed in the space between the substrate W and the shielding plate 842 by the shielding plate 842. Therefore, it is possible to suppress or prevent the soft X-rays irradiated from the irradiation window 735 from being scattered around the substrate W, and thus the safety of the substrate processing apparatus 840 can be improved.
- FIG. 44 is a diagram showing a configuration of a substrate processing apparatus 1001 to which the processing liquid processing apparatus according to the nineteenth embodiment of the present invention is applied.
- the substrate processing apparatus 1001 is, for example, a batch type substrate processing apparatus that collectively performs processing liquid processing (cleaning processing) on a plurality of substrates W.
- the substrate processing apparatus 1001 includes a processing tank 1002 for storing a processing liquid, a processing liquid nozzle 1003 for supplying the processing liquid to the processing tank 1002, and a lifter 1004 for immersing the substrate W in the processing liquid stored in the processing tank 1002.
- a circulation mechanism 1005 that circulates the treatment liquid stored in the treatment tank 1002 and a control device 1006 that controls each device and valve provided in the substrate treatment apparatus 1001 are included.
- the treatment tank 1002 has a double tank structure including an inner tank 1007 and an outer tank 1008 having an upper opening opened upward.
- the inner tank 1007 is configured to store the processing liquid and accommodate a plurality of substrates W.
- the outer tub 1008 is provided on the outer surface of the upper opening of the inner tub 1007, and the height of its upper edge is set higher than the height of the upper edge of the inner tub 1007.
- a drain valve 1020 is interposed on the bottom wall of the inner tank 1007.
- the drainage valve 1020 is a so-called piston valve that opens and closes a part of the bottom wall of the inner tank 1007 by moving a piston (not shown) forward and backward. Due to the retreat of the piston (not shown), a part of the bottom surface of the inner tank 1007 is detached and a drain port is formed on the bottom surface of the inner tank 1007, whereby the processing liquid is quickly drained. Yes. That is, the processing tank 1002 has a QDR (Quick Dump Rinse) function. The processing liquid discharged from the bottom of the inner tank 1007 is sent to a waste liquid device for processing.
- QDR Quality Dump Rinse
- the processing liquid nozzle 1003 is connected to a processing liquid pipe 1010 in which a processing liquid valve 1009 is interposed.
- the processing liquid nozzle 1003 has a large number of fine discharge ports (not shown), and is constituted by, for example, a shower nozzle that discharges liquid in the form of droplets.
- the control device 1006 opens the processing liquid valve 1009, the processing liquid discharged from the processing liquid nozzle 1003 in a shower shape is supplied into the inner tank 1007.
- the overflowing processing liquid is received by the outer tank 1008 and collected.
- Water or diluted chemical is used as the treatment liquid.
- any of DIW (deionized water), carbonated water, electrolytic ionic water, hydrogen water, ozone water, and dilute concentration (for example, about 10 ppm to 100 ppm) hydrochloric acid water can be employed.
- Diluent solutions include hydrofluoric acid diluted to a predetermined concentration, BHF (BufferdPMHF), APM (ammonia-hydrogen peroxide mixture), TMAH (tetramethylammonium hydroxide aqueous solution), aqueous ammonia, HPM (hydrochloric acid / hydrogen / peroxide mixture) can be used. The same applies to not only this embodiment (19th embodiment) but also the 19th to 27th embodiments.
- the substrate W held by the lifter 1004 is immersed in the processing liquid stored in the inner tank 1007.
- the lifter 1004 includes a plurality of holding bars 1011 extending horizontally.
- the plurality of substrates W are held in an upright position (vertical posture) with the lower edges of the substrates W being brought into contact with each other by the plurality of holding rods 1011 in a state where the plurality of substrates W are aligned in the frontward direction of the drawing.
- Lifter 1004 includes an elevating mechanism 1022.
- the lifting mechanism 1022 includes a processing position where the substrate W held by the lifter 1004 is positioned in the inner tank 1007 (position shown in FIG. 44), and the substrate W held by the lifter 1004 is positioned above the inner tank 1007.
- the lifter 1004 is moved up and down between the retracted position (not shown). Accordingly, when the lifter 1004 is moved to the processing position by the lifting mechanism 1022, a plurality of substrates W held by the lifter 1004 are immersed in the processing liquid. Thereby, the process using the process liquid with respect to the board
- the circulation mechanism 1005 includes a circulation pipe 1012 that guides the treatment liquid discharged from the treatment tank 1002 to the treatment tank 1002 again, a plurality of circulation nozzles 1013 connected to the downstream end of the circulation pipe 1012, and the circulation pipe 1012. And a circulation pump 1014 for sending the processing liquid to the circulation nozzle 1013.
- the circulation pipe 1012 includes a return pipe (overflow pipe) 1019 having an upstream end connected to the bottom of the outer tank 1008, and a branch pipe (treatment liquid supply pipe) branched into a plurality from the downstream end of the return pipe 1019. ) 1016.
- a circulation nozzle 1013 is attached to the tip of each branch pipe 1016.
- Each circulation nozzle 1013 has one or a plurality of discharge ports, and discharges the processing liquid into the inner tank 1007.
- a circulation pump 1014, a filter 1015, and a circulation valve 1021 are interposed in this order from the upstream side.
- the filter 1015 is a filter 1015 for filtering the processing liquid flowing through the circulation pipe 1012
- the circulation valve 1021 is a valve for opening and closing the return pipe 1019.
- a soft X-ray irradiation unit (X-ray irradiation means) 1017 is attached to at least one of the plurality of branch pipes 1016 (one in this embodiment).
- the soft X-ray irradiation unit 1017 is a unit for irradiating the processing liquid existing in the branch pipe 1016 with soft X-rays.
- FIG. 45A is a schematic cross-sectional view showing the configuration of the branch pipe 1016 and the soft X-ray irradiation unit 1017, respectively.
- the branch pipe 1016 is formed using a resin material such as polyvinyl-chloride, PTFE (poly-tetra-fluoro-ethylene), or PFA (perfluoro-alkylvinyl-ether-tetrafluoro-ethlene-copolymer).
- a resin material such as polyvinyl-chloride, PTFE (poly-tetra-fluoro-ethylene), or PFA (perfluoro-alkylvinyl-ether-tetrafluoro-ethlene-copolymer).
- a circular first opening 1052 is formed in the middle pipe wall.
- a soft X-ray irradiation unit 1017 is attached to the branch pipe 1016 so as to close the first opening 1052.
- the soft X-ray irradiation unit 1017 includes a soft X-ray generator (X-ray generator) 1025, a cover 1026 made of, for example, polyvinyl-chloride covering the periphery of the soft X-ray generator 1025, A gas nozzle (gas supply means) 1027 for supplying a gas to the inside of the cover 1026 is provided, and soft X-rays are irradiated sideways.
- the cover 1026 is in the shape of a horizontally long rectangular box surrounding the soft X-ray generator 1025 with a space from the soft X-ray generator 1025, and the soft X-ray generator 1025 is formed on the vertical plate-shaped horizontal wall 1026A.
- a circular second opening 1028 having the same diameter as the first opening 1052 is formed in a portion facing the irradiation window 1035 described next.
- the soft X-ray irradiation unit 1017 is attached to the branch pipe 1016 so that the second opening 1028 of the cover 1026 coincides with the first opening 1052 of the branch pipe 1016 and the lateral wall 1026A is in close contact with the outer periphery of the branch pipe 1016.
- the second opening 1028 is closed by a disk-shaped window member 1071.
- the window member 1071 closes the second opening 1028 from the inside of the cover 1026.
- the window member 1071 closes not only the second opening 1028 but also the first opening 1052.
- a substance having a small atomic weight is used so that soft X-rays having a low penetrating power are easily transmitted.
- beryllium (Be) is adopted as the material of the window member 1071.
- the thickness of the window member 1071 is set to about 0.3 mm, for example.
- Soft X-ray generator 1025 emits (radiates) soft X-rays used to ionize the processing liquid passing through the branch pipe 1016.
- the soft X-ray generator 1025 includes a case body 1029, a soft X-ray tube 1030 that is long to generate soft X-rays, and a high voltage unit 1031 that supplies a high voltage to the soft X-ray tube 1030.
- the case body 1029 is a horizontally long rectangular tube housing the soft X-ray tube 1030 and the high voltage unit 1031 therein, and is made of a material having conductivity and heat conductivity (for example, a metal material such as aluminum). It is formed using.
- the high voltage unit 1031 inputs a driving voltage having a high potential of ⁇ 9.5 kV, for example, to the soft X-ray tube 1030.
- the high voltage unit 1031 is supplied with a voltage from a power source (not shown) through a feed line 1043 drawn out of the cover 1026 through a through hole 1042 formed in the cover 1026.
- the soft X-ray tube 1030 is made of a glass or metal cylindrical vacuum tube, and is arranged so that the tube direction is horizontal. One end (opening end, left end shown in FIG. 45A) of the soft X-ray tube 1030 forms a circular opening 1041. The other end of the soft X-ray tube 1030 (the right end shown in FIG. 45A) is closed and serves as a stem 1032.
- a filament 1033 serving as a cathode and a target 1036 serving as an anode are disposed so as to face each other.
- the soft X-ray tube 1030 contains a filament 1033 and a focus 1034. Specifically, a filament 1033 as a cathode is disposed on the stem 1032. The filament 1033 is electrically connected to the high voltage unit 1031. Filament 1033 is surrounded by a cylindrical focus 1034.
- the open end of the soft X-ray tube 1030 is closed by a plate-shaped irradiation window 1035 having a vertical posture.
- the irradiation window 1035 has a disk shape, for example, and is fixed to the wall surface of the open end of the soft X-ray tube 1030 by silver brazing.
- a material of the irradiation window 1035 a substance having a small atomic weight is used so that soft X-rays having a low transmission power can be easily transmitted.
- beryllium (Be) is adopted.
- the thickness of the irradiation window 1035 is set to about 0.3 mm, for example.
- the irradiation window 1035 faces the inner surface 1071A of the window member 1071 and is arranged with a small gap from the window member 1071.
- a metal target 1036 is formed on the inner surface 1035A of the irradiation window 1035 by vapor deposition.
- a metal having a high atomic weight and a high melting point such as tungsten (W) or tantalum (Ta) is used.
- the filament 1033 When the driving voltage from the high voltage unit 1031 is applied to the filament 1033 which is a cathode, the filament 1033 emits electrons. The electrons emitted from the filament 1033 are converged at the focus 1034 to become an electron beam, and soft X-rays are generated by colliding with the target 1036. The generated soft X-rays are emitted (radiated) from the irradiation window 1035 in the lateral direction (leftward in FIG. 45A), and irradiate the inside of the branch pipe 1016 through the window member 1071 and the first opening 1052.
- the irradiation angle (irradiation range) of soft X-rays from the irradiation window 1035 is a wide angle (for example, 130 °) as shown in FIG.
- the wavelength of the soft X-ray irradiated from the irradiation window 1035 to the inside of the branch pipe 1016 is, for example, 0.13 to 0.4 nm.
- the entire outer surface of the window member 1071 (wall surface on the side where the treatment liquid flows in the closed window) 1071B is covered with a hydrophilic film (film) 1038.
- the hydrophilic film 1038 is, for example, a polyimide resin film.
- the reason why the outer surface 1071B of the window member 1071 is covered with the hydrophilic film 1038 is to protect the beryllium-made window member 1071 having poor acid resistance from acid contained in the treatment liquid such as water.
- the film thickness of the hydrophilic film 1038 is 50 ⁇ m or less, and preferably about 10 ⁇ m. Since the hydrophilic film 1038 has hydrophilicity, it is possible to suppress or prevent air bubbles from being mixed between the film 1038 and the treatment liquid. Thereby, the soft X-rays from the irradiation window 1035 can be satisfactorily irradiated to the processing liquid flowing through the branch pipe 1016.
- the discharge port of the gas nozzle 1027 opens in the upper wall of the cover 1026.
- Gas from a gas supply source (not shown) is supplied to the gas nozzle 1027 via a gas valve (gas supply means) 1037.
- the gas discharged from the gas nozzle 1027 include CDA (clean air with low humidity) and an inert gas such as nitrogen gas.
- the gas discharged from the gas nozzle 1027 is supplied into the cover 1026.
- the soft X-ray generator 1025 may be heated by driving the soft X-ray generator 1025, supplying the gas into the cover 1026 cools the soft X-ray generator 1025 and generates soft X-rays. The temperature increase in the ambient atmosphere of the vessel 1025 can be suppressed.
- the control device 1006 has a configuration including a microcomputer, and controls operations of the elevating mechanism 1022 and the circulation pump 1014 according to a predetermined program. Further, the control device 1006 controls opening / closing operations of the processing liquid valve 1009, the drain valve 1020, and the like.
- FIG. 45B is a process diagram illustrating a processing example of substrate processing executed in the substrate processing apparatus 1001. An example of substrate processing will be described with reference to FIGS. 44, 45A, and 45B.
- the circulation of the processing liquid is continuously performed in the circulation mechanism 1005. That is, except for specific situations such as replacement of processing liquid and apparatus maintenance, the processing liquid is always stored in the processing tank 1002, and the processing liquid does not stay in the processing tank 1002 and passes through the circulation pipe 1012. It is circulating. During such circulation, the circulation valve 1021 is opened. As a result, the processing liquid flowing out from the outer tank 1008 passes through the circulation pipe 1012 and is supplied from the circulation nozzle 1013 to the inside of the inner tank 1007.
- the processing liquid When the processing liquid is further supplied from the circulation nozzle 1013 while the inside of the inner tank 1007 is filled with the processing liquid, the surplus processing liquid overflows from the upper end of the inner tank 1007 and flows into the outer tank 1008. . Then, the processing liquid that has flowed out of the outer tank 1008 passes through the circulation pipe 1012 and is supplied from the circulation nozzle 1013 to the inside of the inner tank 1007.
- the circulation valve 1021 is closed and the circulation pump 1014 is stopped, and the drain valve 1020 is opened, so that the treatment liquid stored in the inner tank 1007 is rapidly drained. Liquid is applied (step S1001).
- the control device 1006 controls the lifter 1004 to receive the plurality of substrates W received at the delivery position into the inner tank 1007. To the processing position inside. As a result, the substrate W is put into the processing bath 1002 (step S1002). The substrate W is held inside an empty inner tank 1007.
- the control device 1006 opens the processing liquid valve 1009 and discharges the processing liquid from the processing liquid nozzle 1003 in a shower shape. (Step S1003). At this time, the drainage valve 1020 remains open and the drainage port (not shown) is opened, so that the treatment liquid containing the contaminant cannot be stored.
- the control device 1006 closes the drain valve 1020. At this time, since the discharge of the processing liquid from the processing liquid nozzle 1003 is continued, the processing liquid is stored in the inner tank 1007. Thereby, the board
- the control device 1006 closes the processing liquid valve 1009 and stops the discharge of the processing liquid from the processing liquid nozzle 1003.
- the control device 1006 starts driving the circulation pump 1014 and opens the circulation valve 1021.
- the treatment liquid does not stay in the treatment tank 1002 and circulates through the circulation pipe 1012 (step S1004).
- the processing liquid flowing out from the outer tank 1008 is supplied to the inside of the inner tank 1007 from the circulation nozzle 1013 through the circulation pipe 1012.
- the surplus processing liquid overflows from the upper end of the inner tank 1007 and flows into the outer tank 1008. .
- the processing liquid that has flowed out of the outer tank 1008 passes through the circulation pipe 1012 and is supplied from the circulation nozzle 1013 to the inside of the inner tank 1007.
- Contaminants such as particles are removed when the circulating processing liquid passes through the filter 1015.
- a clean processing liquid from which contaminants have been removed is discharged from the circulation nozzle 1013 toward the inner tank 1007.
- the processing liquid is in a liquid-tight state in the nozzle pipe and the branch pipe 1016 of the circulation nozzle 1013.
- control device 1006 controls the high voltage unit 1031 (see FIG. 45A) to generate soft X-rays in the soft X-ray generator 1025 (see FIG. 45A) of the soft X-ray irradiation unit 1017.
- X-rays are irradiated from the irradiation window 1035 (see FIG. 45A) through the window member 1071 toward the inside of the branch pipe 1016 (step S1005). Thereby, soft X-rays are irradiated to the processing liquid flowing through the branch pipe 1016.
- FIG. 46 is an illustrative view showing a state of irradiation of soft X-rays into the branch pipe 1016 shown in FIG.
- processing liquid flowing through the branch pipe 1016 is irradiated with soft X-rays.
- the part irradiated with soft X-rays (the part facing the first opening 1052 in the branch pipe 1016.
- the shaded part shown in FIG. 46 (hereinafter referred to as “processing liquid irradiation part 1054”).
- electrons are emitted from the water molecules by excitation of the water molecules.
- a plasma state in which a large amount of electrons and a large amount of positive ions of water molecules are mixed is formed in the irradiated portion 1054 of the processing liquid.
- the processing liquid is liquid-tight in the nozzle pipe and the branch pipe 1016 of the circulation nozzle 1013 as described above, the substrate W and the processing liquid immersed in the processing liquid stored in the inner tank 1007 are used.
- the irradiation portion 1054 is connected to the processing liquid stored in the inner tank 1007 and the processing liquid in the branch pipe 1016.
- electrons from the irradiation portion 1054 of the processing liquid are directed toward the substrate W due to a potential difference between the irradiation portion 1054 of the processing liquid and the positively charged substrate W. It moves through the processing liquid stored in the inner tank 1007 and the processing liquid in the branch pipe 1016. Thereby, as a result of supplying a large amount of electrons to the substrate W, the positively charged substrate W is neutralized.
- the substrate W is positively charged before being immersed in the processing liquid, the substrate W is transferred via the processing liquid in the inner tank 1007 or the processing liquid in the branch pipe 1016 according to the same principle. Static neutralization is possible.
- the control device 1006 stops the soft X-ray irradiation from the soft X-ray irradiation unit 1017 (step S1006).
- the processed substrate W is unloaded from the inner tank 1007 (step S1007).
- the unloading of the substrates W is performed by lifting the lifter 1004 that collectively holds the plurality of substrates W from the processing position inside the inner tank 1007 to the upper delivery position. A lot consisting of a plurality of substrates W raised to the delivery position is transferred to the processing tank of the next process.
- step S1001 If there is a subsequent substrate W to be processed subsequently, the process returns to step S1001 and the above-described series of processing is repeatedly executed.
- the substrate W can be prevented from being charged during the immersion treatment of the treatment liquid. Further, even if the substrate W is charged before the immersion treatment, the charge on the substrate W can be removed (that is, static elimination). As a result, device destruction due to charging of the substrate W can be prevented.
- FIG. 47 is a diagram showing a configuration of a substrate processing apparatus 1201 to which the processing liquid processing apparatus according to the twentieth embodiment of the present invention is applied.
- the substrate processing apparatus 1201 according to the twentieth embodiment is different from the substrate processing apparatus 1001 according to the nineteenth embodiment in that the soft X-ray irradiation unit (X-ray irradiation means) 1217 is more than the circulation pump 1014 in the return pipe 1019. Is also located upstream.
- the soft X-ray irradiation unit 1217 is attached to the return pipe 1019.
- the return pipe 1019 has a round tubular shape (cylindrical shape), such as polyvinyl-chloride, PTFE (polytetrafluoroethylene), PFA (perfluoro-alkylvinyl-ether-tetrafluoro-ethlene-copolymer), etc. These resin materials are used.
- PTFE polytetrafluoroethylene
- PFA perfluoro-alkylvinyl-ether-tetrafluoro-ethlene-copolymer
- the soft X-ray irradiation unit 1217 adopts the same configuration as the soft X-ray irradiation unit 1017 (see FIG. 45A) according to the nineteenth embodiment.
- the soft X-ray irradiation unit 1217 is attached to the return pipe 1019 so as to close the opening of the return pipe 1019.
- the opening of the cover of the soft X-ray irradiation unit 1217 matches the opening of the return pipe 1019.
- the wall surface of the cover of the soft X-ray irradiation unit 1217 (corresponding to the lateral wall 1026A of the cover 1026 of the soft X-ray irradiation unit 1017 (see FIG. 45A)) is in close contact with the outer periphery of the return pipe 1019.
- a high voltage unit of the soft X-ray irradiation unit 1217 (corresponding to the high voltage unit 1031 (see FIG. 45A) of the soft X-ray irradiation unit 1017 according to the nineteenth embodiment) is connected to the control device 1006.
- the same processing as in the processing example shown in FIG. 45B is performed.
- the processing liquid does not stay in the processing tank 1002 and circulates through the circulation pipe 1012.
- the processing liquid is further supplied from the circulation nozzle 1013 while the inside of the inner tank 1007 is filled with the processing liquid, the excess processing liquid overflows (overflows) from the upper end of the inner tank 1007. Flows into 1008.
- FIG. 48 is a schematic cross-sectional view showing a state where the processing liquid has overflowed from the upper end of the inner tank 1007.
- the outer tank 1008 has an annular plate-shaped bottom wall 1081 that surrounds the outer periphery of the inner tank 1007, and a rising wall 1082 that rises vertically upward from the outer peripheral edge of the bottom wall 1081.
- An overflow port 1083 formed of a through-hole penetrating the bottom wall 1081 in the thickness direction is formed at, for example, one place in the circumferential direction of the bottom wall 1081.
- the upstream end of the return pipe 1019 is connected to the overflow port 1083.
- the supply of the processing liquid from the circulation nozzle 1013 is intermittently continued, so that the inside of the return pipe 1019 is made liquid-tight with the processing liquid. Further, as shown in FIG. 48, the state where the liquid mass 1080 of the processing liquid gets over the upper end of the inner tank 1007 always continues, so that the processing liquid stored in the inner tank 1007 and the processing stored in the outer tank 1008 are performed. The liquid is always connected by such a liquid mass 1080 of the processing liquid.
- the soft X-ray is irradiated from the soft X-ray irradiation unit 1217 to the processing liquid circulating in the return pipe 1019 (step S1005 in FIG. 45B).
- the portion irradiated with soft X-rays (treatment liquid irradiation portion.
- the portion equivalent to the treatment liquid irradiation portion 1054 according to the nineteenth embodiment shown in FIG. 46) is a water molecule. Electrons are emitted from the water molecules by excitation of. As a result, a plasma state in which a large amount of electrons and a large amount of positive ions of water molecules are mixed is formed in the irradiated portion of the treatment liquid.
- the processing liquid is liquid-tight in the return pipe 1019, and the processing liquid stored in the inner tank 1007 and the processing liquid stored in the outer tank 1008 are a liquid mass of the processing liquid. Since it is always connected by 1080, the substrate W immersed in the processing liquid stored in the inner tank 1007 and the irradiated portion of the processing liquid are stored in the processing liquid stored in the inner tank 1007 and the outer tank 1008. And the processing liquid in the return pipe 1019.
- the substrate W is positively charged, electrons from the irradiation portion of the processing liquid are directed toward the substrate W due to a potential difference between the irradiation portion of the processing liquid and the positively charged substrate W, and the inner tank It moves through the processing liquid stored in 1007 and the processing liquid in the return pipe 1019. Thereby, as a result of supplying a large amount of electrons to the substrate W, the positively charged substrate W is neutralized.
- FIG. 49 is a diagram showing a configuration of a substrate processing apparatus 1301 to which the processing liquid processing apparatus according to the twenty-first embodiment of the present invention is applied.
- the substrate processing apparatus 1301 according to the twenty-first embodiment is different from the substrate processing apparatus 1001 according to the nineteenth embodiment in that an inner tank 1307 having a substantially box-shaped first bulging portion 1318 instead of the inner tank 1007. And a soft X-ray irradiation unit (X-ray irradiation means) 1317 is attached to the wall of the first bulging portion 1318.
- X-ray irradiation means X-ray irradiation means
- the first bulging portion 1318 bulges outward from the cylindrical peripheral wall 1307A of the inner tank 1307 along the horizontal direction, and is formed integrally with the peripheral wall 1307A of the inner tank 1307.
- An opening 1321 is formed in the upper wall or lower wall (upper surface in FIG. 49) of the first bulging portion 1318.
- the soft X-ray irradiation unit 1317 employs a configuration equivalent to that of the soft X-ray irradiation unit 1017 (see FIG. 45A) according to the nineteenth embodiment.
- the soft X-ray irradiation unit 1317 is attached so as to close the opening 1321 of the first bulging portion 1318.
- the opening of the cover of the soft X-ray irradiation unit 1317 (the opening corresponding to the second opening 1028 of the cover 1026 of the soft X-ray irradiation unit 1017 (see FIG. 45A)) is the opening 1321 of the first bulging portion 1318.
- a high voltage unit of the soft X-ray irradiation unit 1317 (corresponding to the high voltage unit 1031 (see FIG. 45A) of the soft X-ray irradiation unit 1017 according to the nineteenth embodiment) is connected to the control device 1006.
- the same processing as in the processing example shown in FIG. 45B is performed.
- the processing liquid is stored in the inner tank 1307, and thereby the inside of the first bulging portion 1318 becomes liquid-tight with the processing liquid.
- the soft X-ray is irradiated from the soft X-ray irradiation unit 1317 to the processing liquid in the first bulging portion 1318 (step S1005 in FIG. 45B).
- the portion irradiated with soft X-rays (the processing liquid irradiation portion; a portion equivalent to the processing liquid irradiation portion 1054 according to the nineteenth embodiment shown in FIG. 46). Electrons are emitted from the water molecules by excitation of the water molecules. As a result, a plasma state in which a large amount of electrons and a large amount of positive ions of water molecules are mixed is formed in the irradiated portion of the treatment liquid.
- the substrate W immersed in the processing liquid stored in the inner tank 1307 and the irradiated portion of the processing liquid are connected via the processing liquid stored in the inner tank 1307.
- the substrate W is positively charged, electrons from the irradiation portion of the processing liquid are directed toward the substrate W due to a potential difference between the irradiation portion of the processing liquid and the positively charged substrate W, and the inner tank It moves through the processing liquid stored in 1307.
- the positively charged substrate W is neutralized.
- FIG. 50 is a diagram showing a configuration of a substrate processing apparatus 1401 to which the processing liquid processing apparatus according to the twenty-second embodiment of the present invention is applied.
- the substrate processing apparatus 1401 according to the twenty-second embodiment differs from the substrate processing apparatus 1001 according to the nineteenth embodiment in that it has a substantially box-shaped second bulging portion 1418 at the bottom instead of the inner tank 1007.
- the substrate processing apparatus 1401 includes a circulation mechanism having the same configuration as the circulation mechanism 1005 (see FIG. 44), but the illustration thereof is omitted.
- the second bulging portion 1418 bulges outward from the bottom wall 1407A of the inner tank 1407 along the horizontal, and is formed integrally with the bottom wall 1407A of the inner tank 1407.
- a drainage valve 1420 is interposed at a predetermined position on the lower wall of the second bulging portion 1418.
- the drainage valve 1420 has the same configuration as the drainage valve 1020 (see FIG. 44). That is, the second bulging portion 1418 is a portion for installing a QDR (Quick Dump Rinse).
- QDR Quality Dump Rinse
- One end of a pipe 1423 is connected to the upper wall of the second bulging portion 1418, for example.
- the inside of the pipe 1423 communicates with the inside of the second bulging portion 1418.
- the connection position of the pipe 1423 in the second bulging portion 1418 is desirably a position different from the arrangement position of the drainage valve 1420 in the second bulging portion 1418 in plan view.
- the pipe 1423 has a round tubular shape (cylindrical shape), such as polyvinyl-chloride, PTFE (polytetrafluoroethylene), or PFA (perfluoro-alkylvinyl-ether-tetrafluoro-ethlene-copolymer). It is formed using a resin material. An opening 1421 is formed in the middle of the pipe 1423.
- the soft X-ray irradiation unit 1417 employs a configuration equivalent to that of the soft X-ray irradiation unit 1017 (see FIG. 45A) according to the nineteenth embodiment.
- the soft X-ray irradiation unit 1417 is attached to the pipe 1423 so as to close the opening 1421 of the pipe 1423.
- the opening of the cover of the soft X-ray irradiation unit 1417 (the opening corresponding to the second opening 1028 of the cover 1026 of the soft X-ray irradiation unit 1017 (see FIG.
- the wall surface of the cover of the soft X-ray irradiation unit 1417 (corresponding to the lateral wall 1026A of the cover 1026 of the soft X-ray irradiation unit 1017 (see FIG. 45A)) is in close contact with the outer periphery of the pipe 1423.
- the high voltage unit of the soft X-ray irradiation unit 1417 (corresponding to the high voltage unit 1031 (see FIG. 45A) of the soft X-ray irradiation unit 1017 according to the nineteenth embodiment) is connected to the control device 1006.
- the same processing as in the processing example shown in FIG. 45B is performed.
- the processing liquid is stored in the inner tank 1407, and the second bulging portion 1418 and the pipe 1423 are also made liquid-tight by the processing liquid.
- the soft X-ray is irradiated from the soft X-ray irradiation unit 1417 to the processing liquid circulating in the pipe 1423 (step S1005 in FIG. 45B).
- the portion irradiated with soft X-rays contains water molecules. Electrons are emitted from the water molecules by excitation. As a result, a plasma state in which a large amount of electrons and a large amount of positive ions of water molecules are mixed is formed in the irradiated portion of the treatment liquid.
- the processing liquid is in a liquid-tight state in the pipe 1423 and the second bulging portion 1418 is also liquid-tight with the processing liquid, so that the processing liquid stored in the inner tank 1407 is stored.
- the substrate W immersed in the substrate and the irradiated portion of the processing liquid are connected via the processing liquid stored in the inner tank 1407 (including the second bulging portion 1418) and the processing liquid in the pipe 1423.
- the electrons from the irradiation portion of the processing liquid are directed toward the substrate W due to a potential difference between the irradiation portion of the processing liquid and the positively charged substrate W, and the pipe 1423. It moves through the inner processing liquid and the processing liquid stored in the inner tank 1407. Thereby, as a result of supplying a large amount of electrons to the substrate W, the positively charged substrate W is neutralized.
- FIG. 51 is a diagram showing a configuration of a substrate processing apparatus 1501 to which the processing liquid processing apparatus according to the twenty-third embodiment of the present invention is applied.
- the substrate processing apparatus 1501 according to the twenty-third embodiment is different from the substrate processing apparatus 1001 according to the nineteenth embodiment in that the processing liquid flowing out from the outer tank 1008 is not provided with the circulation mechanism 1005 (see FIG. 44). In other words, waste liquid is collected or collected through the drain pipe 1519, and a treatment liquid nozzle 1561 is provided instead of the treatment liquid nozzle 1003 (see FIG. 44).
- a soft X-ray irradiation unit 1562 for irradiating the processing liquid flowing through the processing liquid nozzle 1561 with soft X-rays is attached to the processing liquid nozzle 1561.
- the treatment liquid nozzle 1561 is, for example, a straight nozzle that discharges liquid in a continuous flow state, and is disposed with the discharge port 1553 facing the inside of the inner tank 1007.
- a processing liquid pipe 1513 to which a processing liquid from a processing liquid supply source is supplied is connected to the processing liquid nozzle 1561.
- a processing liquid valve 1514 for switching supply / stop of processing liquid from the processing liquid nozzle 1561 is interposed in the middle of the processing liquid pipe 1513.
- the treatment liquid nozzle 1561 has a round tubular (cylindrical) nozzle pipe 1551 extending in the vertical direction.
- the nozzle pipe 1551 is formed using a resin material such as polyvinyl-chloride, PTFE (poly-tetra-fluoro-ethylene), or PFA (perfluoro-alkyl vinyl-ether-tetrafluoro-ethlene-copolymer).
- a round discharge port 1553 is opened at the front end (lower end) of the nozzle pipe 1551.
- a circular opening 1552 is formed in the middle pipe wall.
- the soft X-ray irradiation unit 1562 adopts the same configuration as the soft X-ray irradiation unit 1017 (see FIG. 45A) according to the nineteenth embodiment.
- the soft X-ray irradiation unit 1562 is attached to the nozzle pipe 1551 so as to close the opening 1552 of the nozzle pipe 1551.
- the opening of the cover of the soft X-ray irradiation unit 1562 (the opening corresponding to the second opening 1028 of the cover 1026 of the soft X-ray irradiation unit 1017 (see FIG.
- the wall surface of the cover of the X-ray irradiation unit 1562 (corresponding to the lateral wall 1026A (see FIG. 45A) of the cover 1026 of the soft X-ray irradiation unit 1017) is in close contact with the outer periphery of the nozzle pipe 1551.
- the high voltage unit of the soft X-ray irradiation unit 1562 (corresponding to the high voltage unit 1031 (see FIG. 45A) of the soft X-ray irradiation unit 1017 according to the nineteenth embodiment) is connected to the control device 1006.
- the substrate processing apparatus 1501 After the processing liquid is stored in the processing tank 1502, the substrates W are collectively put into the processing tank 1502 by the lifter 1004. Thereafter, substrate immersion processing (steps S1004 to S1006 in FIG. 45B) is performed.
- the substrate processing apparatus 1501 since the substrate processing apparatus 1501 is not provided with the circulation mechanism 1005 (see FIG. 44), the processing liquid stored in the processing tank 1502 is not circulated in the substrate immersion processing. Instead, the supply of the processing liquid from the processing liquid nozzle 1561 is continued intermittently during the substrate immersion process.
- the mode of the processing liquid discharged from the discharge port 1553 of the processing liquid nozzle 1561 is a continuous flow mode that leads to both the discharge port 1553 and the liquid level of the processing liquid stored in the inner tank 1007.
- the processing liquid in the nozzle pipe 1551 of the processing liquid nozzle 1561, the processing liquid is in a liquid-tight state.
- the soft X-ray is irradiated from the soft X-ray irradiation unit 1562 to the processing liquid circulating in the nozzle pipe 1551 (step S1005 in FIG. 45B).
- the processing liquid is in a liquid-tight state in the nozzle pipe 1551, and the processing liquid discharged from the discharge port 1553 is the processing liquid stored in the discharge port 1553 and the inner tank 1007. Therefore, the substrate W immersed in the processing liquid stored in the inner tank 1007 and the irradiated portion of the processing liquid are stored in the inner tank 1007. Are connected through the processing liquid in the continuous flow state and the processing liquid in the nozzle pipe 1551. At this time, if the substrate W is positively charged, electrons from the irradiation portion of the processing liquid are directed toward the substrate W due to a potential difference between the irradiation portion of the processing liquid and the positively charged substrate W. It moves through the processing liquid in 1551, the above-described continuous flow processing liquid, and the processing liquid stored in the inner tank 1007. Thereby, as a result of supplying a large amount of electrons to the substrate W, the positively charged substrate W is neutralized.
- a soft X-ray irradiation unit 1562 may be provided in a pipe that communicates, and the processing liquid flowing through the pipe may be irradiated with soft X-rays from the soft X-ray irradiation unit 1562.
- FIG. 52 is a diagram showing a configuration of a substrate processing apparatus 1601 to which the processing liquid processing apparatus according to the twenty-fourth embodiment of the present invention is applied.
- the substrate processing apparatus 1601 according to the twenty-fourth embodiment is different from the substrate processing apparatus 1001 according to the nineteenth embodiment in that the processing liquid flowing out from the outer tank 1008 is not provided with the circulation mechanism 1005 (see FIG. 44). This is a point where waste liquid is collected or collected through the drain pipe 1519 and a processing liquid nozzle 1561 for discharging the processing liquid toward the outer tank 1008 is provided.
- the treatment liquid nozzle 1561 is, for example, a straight nozzle that discharges liquid in a continuous flow state, and is disposed with its discharge port 1553 facing the inside of the outer tank 1008.
- a soft X-ray irradiation unit 1562 for irradiating the processing liquid flowing through the processing liquid nozzle 1561 with soft X-rays is attached to the processing liquid nozzle 1561. Since a series of configurations related to the treatment liquid nozzle 1561 and the soft X-ray irradiation unit 1562 are the same as those in the twenty-third embodiment, the same reference numerals as those in the twenty-third embodiment are attached and description thereof is omitted.
- the same processing as in the processing example shown in FIG. 45B is performed.
- the substrate processing apparatus 1601 since the substrate processing apparatus 1601 is not provided with the circulation mechanism 1005 (see FIG. 44), the processing liquid stored in the processing tank 1502 is circulated during the substrate immersion processing (steps S1004 to S1006 in FIG. 45B). Not. Instead, the supply of the processing liquid from the processing liquid nozzle 1003 is intermittently continued during the substrate immersion process.
- the processing liquid is further supplied from the processing liquid nozzle 1003 while the inside of the inner tank 1007 is filled with the processing liquid, the surplus processing liquid overflows (overflows) from the upper end of the inner tank 1007. It flows into the tank 1008.
- the processing liquid valve 1514 is opened, and the processing liquid is discharged from the discharge port 1553 of the processing liquid nozzle 1561 toward the inside of the outer tank 1008.
- the mode of the processing liquid discharged from the discharge port 1553 of the processing liquid nozzle 1561 has a continuous flow mode connected to both the discharge port 1553 and the liquid level of the processing liquid stored in the outer tank 1008. At this time, the processing liquid is in a liquid-tight state in the nozzle pipe 1551 of the processing liquid nozzle 1561.
- the soft X-ray is irradiated from the soft X-ray irradiation unit 1562 to the processing liquid circulating in the nozzle pipe 1551 (step S1005 in FIG. 45B).
- the processing liquid is in a liquid-tight state in the nozzle pipe 1551, and the mode of the processing liquid discharged from the discharge port 1553 is both the discharge port 1553 and the liquid level of the processing liquid stored in the outer tank 1008. Since the processing liquid stored in the inner tank 1007 and the processing liquid stored in the outer tank 1008 are always connected by the liquid mass of the processing liquid, the inner tank The substrate W immersed in the processing liquid stored in 1007 and the irradiated portion of the processing liquid are the processing liquid stored in the inner tank 1007, the processing liquid stored in the outer tank 1008, and the continuous flow Are connected to each other via a treatment liquid in the nozzle pipe 1551.
- the substrate W is positively charged, electrons from the irradiation portion of the processing liquid are directed toward the substrate W due to a potential difference between the irradiation portion of the processing liquid and the positively charged substrate W. It moves through the processing liquid in 1551, the above-described continuous flow processing liquid, the processing liquid stored in the outer tank 1008, and the processing liquid stored in the inner tank 1007. Thereby, as a result of supplying a large amount of electrons to the substrate W, the positively charged substrate W is neutralized.
- the hydrophilic film (corresponding to the hydrophilic film 1038 (refer to FIG. 45)) is peeled off from the outer surface of the window member of the soft X-ray irradiation unit 1562 (corresponding to the outer surface 71B (refer to FIG. 45A) of the window member 1071).
- the beryllium contained in the window member may be dissolved in the treatment liquid. Even in such a case, since the processing liquid containing beryllium is drained through the drain pipe 1519, this reliably prevents the processing liquid containing beryllium from being supplied to the substrate W. it can.
- FIG. 53 is a diagram showing a configuration of a substrate processing apparatus 1701 to which the processing liquid processing apparatus according to the twenty-fifth embodiment of the present invention is applied.
- the substrate processing apparatus 1701 according to the twenty-fifth embodiment is different from the substrate processing apparatus 1501 according to the twenty-third embodiment in that a plurality of substrates W are handled together with a cassette 1702 that holds a plurality of substrates W collectively. This is a point immersed in 1502.
- the substrate processing apparatus 1701 is provided with configurations such as a lifter 1004 and an elevating mechanism 1022 of the twenty-third embodiment. The lifter 1004 holds and raises the cassette 1702 in which a plurality of substrates W are held together.
- the cassette 1702 is formed using a resin material such as polyvinyl-chloride, PTFE (polytetrafluoroethylene), or PFA (perfluoro-alkylvinyl-ether-tetrafluoro-ethlene-copolymer).
- a resin material such as polyvinyl-chloride, PTFE (polytetrafluoroethylene), or PFA (perfluoro-alkylvinyl-ether-tetrafluoro-ethlene-copolymer).
- substrate processing apparatus 1701 After the processing liquid is stored in the processing tank 1502, a plurality of substrates W and cassettes 1702 are put into the processing tank 1502. Thereafter, substrate immersion processing (steps S1004 to S1006 in FIG. 45B) is performed.
- the supply of the processing liquid from the processing liquid nozzle 1561 is continued intermittently as in the case of the twenty-third embodiment.
- the mode of the processing liquid discharged from the discharge port 1553 of the processing liquid nozzle 1561 is a continuous flow mode that leads to both the discharge port 1553 and the liquid level of the processing liquid stored in the inner tank 1007.
- the processing liquid is in a liquid-tight state.
- the soft X-ray is irradiated from the soft X-ray irradiation unit 1562 to the processing liquid circulating in the nozzle pipe 1551 (step S1005 in FIG. 45B).
- the portion irradiated with soft X-rays (the processing liquid irradiation portion.
- the portion equivalent to the processing liquid irradiation portion 1054 according to the nineteenth embodiment shown in FIG. 46) is described above.
- a plasma state is formed in the irradiated portion of the processing liquid.
- the processing liquid is in a liquid-tight state in the nozzle pipe 1551, and the processing liquid discharged from the discharge port 1553 is the processing liquid stored in the discharge port 1553 and the inner tank 1007.
- the substrate W immersed in the processing liquid stored in the inner tank 1007 and the cassette 1702 and the irradiation portion of the processing liquid are included in the inner surface 1007.
- the processing liquid stored in the tank 1007, the continuous flow processing liquid, and the processing liquid in the nozzle pipe 1551 are connected.
- the cassette 1702 may be negatively charged.
- electrons from the cassette 1702 are treated with the treatment liquid stored in the inner tank 1007, and the continuous flow treatment described above. It moves toward the positive ions at the irradiated portion of the processing liquid via the processing liquid in the nozzle pipe 1551. As a result, electrons are removed from the cassette 1702, and as a result, the negatively charged cassette 1702 is discharged.
- the present invention is applied to the substrate processing apparatuses 1001, 1201, 1301, 1401, 1501, 1601 in which the processing object is the substrate W has been described.
- the present invention can also be applied to a processing liquid processing apparatus (article cleaning apparatus) that treats as a processing object.
- FIG. 54 is a diagram showing a configuration of an article cleaning apparatus 1801 to which the processing liquid processing apparatus according to the twenty-sixth embodiment of the present invention is applied.
- the article cleaning apparatus 1801 is an apparatus for cleaning an optical component using a processing liquid (cleaning liquid), for example, using an optical component such as a lens L as a processing target.
- the article cleaning apparatus 1801 cleans the lens L by immersing the lens L in the treatment tank 1502.
- a plurality of lenses L are immersed in the processing tank 1502 in a state where they are collectively accommodated in the cassette 1802.
- the article cleaning apparatus 1801 is provided with an ultrasonic generator (not shown) that generates ultrasonic vibrations in the processing liquid stored in the processing tank 1502.
- the general configuration of the article cleaning apparatus 1801 is the same as that of the substrate processing apparatus 1701 according to the 25th embodiment except that an ultrasonic generator (not shown) is provided. Portions common to the embodiment are denoted by the same reference numerals as in FIG. 53, and description thereof is omitted.
- the processing liquid is stored in the processing tank 1502. Accordingly, the lens L and the cassette 1802 are immersed in the processing liquid, and the lens L is cleaned by continuing such immersion processing for a predetermined period.
- the supply of the processing liquid from the processing liquid nozzle 1561 is continued intermittently as in the case of the twenty-third embodiment.
- the mode of the processing liquid discharged from the discharge port 1553 of the processing liquid nozzle 1561 is a continuous flow mode that leads to both the discharge port 1553 and the liquid level of the processing liquid stored in the inner tank 1007.
- the processing liquid is in a liquid-tight state in the nozzle pipe 1551 of the processing liquid nozzle 1561.
- the soft X-ray is irradiated from the soft X-ray irradiation unit 1562 to the processing liquid circulating in the nozzle pipe 1551 (step S1005 in FIG. 45B).
- the portion irradiated with soft X-rays (the processing liquid irradiation portion.
- the portion equivalent to the processing liquid irradiation portion 1054 according to the nineteenth embodiment shown in FIG. 46) is described above.
- a plasma state is formed in the irradiated portion of the processing liquid.
- the processing liquid is in a liquid-tight state in the nozzle pipe 1551, and the processing liquid discharged from the discharge port 1553 is the processing liquid stored in the discharge port 1553 and the inner tank 1007.
- the lens L and the cassette 1802 immersed in the processing liquid stored in the inner tank 1007 and the irradiation portion of the processing liquid are included.
- the processing liquid stored in the tank 1007, the continuous flow processing liquid, and the processing liquid in the nozzle pipe 1551 are connected.
- the lens L or the cassette 1802 is positively charged, the electrons from the irradiation portion of the processing liquid are converted into the lens L by the potential difference between the irradiation portion of the processing liquid and the positively charged lens L or the cassette 1802. And move toward the cassette 1802 through the processing liquid in the nozzle pipe 1551, the above-described continuous flow processing liquid, and the processing liquid stored in the inner tank 1007. Thereby, as a result of supplying a large amount of electrons to the substrate W, the positively charged lens L is neutralized.
- the cassette 1802 may be negatively charged depending on the material of the cassette 1802, the cassette 1802 may be negatively charged.
- electrons from the cassette 1802 are treated with the treatment liquid stored in the inner tank 1007 and the continuous flow treatment. It moves toward the positive ions at the irradiated portion of the processing liquid via the processing liquid in the nozzle pipe 1551.
- electrons are removed from the cassette 1802, and as a result, the negatively charged cassette 1802 is discharged.
- the lens L can be prevented from being charged during the immersion treatment of the treatment liquid. Further, even if the lens L is charged before the immersion treatment, the charge on the lens L can be removed (that is, static elimination).
- lens L has been described as an example of the optical component
- a component container that accommodates an optical component such as a mirror or a diffraction grating can be processed.
- Parts other than the optical parts can also be set as objects to be cleaned (processing objects).
- the same configuration as that of the 19th to 22nd and 24th embodiments may be adopted.
- processing similar to that described in the nineteenth to twenty-second and twenty-fourth embodiments is performed. That is, parts such as an optical component (lens L) are immersed in the processing liquid stored in the processing tank 1502, and in parallel therewith, the processing liquid stored in the processing tank 1502 or the inside is stored in the processing tank 1502.
- Soft X-rays from the soft X-ray units 1017, 1217, 1317, and 1417 are irradiated to the processing liquid existing in the pipes 1016, 1019, and 1423 that communicate with each other.
- FIG. 55 is a diagram showing a configuration of an article cleaning apparatus 1901 to which the processing liquid processing apparatus according to the twenty-seventh embodiment of the present invention is applied.
- the article cleaning apparatus 1901 is an apparatus for cleaning the substrate container 1602 using a processing liquid (cleaning liquid), for example, using the substrate container (container) 1602 as an object to be processed.
- the article cleaning apparatus 1901 cleans the substrate container 1602 by immersing the substrate container 1602 in the treatment tank 1502.
- FIG. 56 is a perspective view showing the configuration of the substrate container 1602.
- the substrate container 1602 is a container that accommodates the substrate W in a sealed state.
- An example of the substrate container 1602 is FOSB (Front Opening Shipping Shipping Box).
- the FOSB is exclusively used to deliver the substrate W from the semiconductor wafer manufacturer to the semiconductor device manufacturer.
- the FOSB accommodates a plurality of unprocessed substrates W and prevents damage to the substrates W while maintaining the cleanliness of these substrates W.
- the substrate container 1602 is attached to a bottomed box-shaped container body 1603 having an opening 1603A on the side, a lid 1604 for opening and closing the opening 1603A of the container body 1603, and an inner wall of the container body 1603.
- a multi-stage container support shelf 1606 and a multi-stage lid support shelf 1605 attached to the lid 1604 are included.
- the substrate W is taken in and out of the container main body 1603 through the opening 1603A.
- Container body 1603 and lid 1604 are each formed using a resin material such as polyvinyl-chloride.
- the schematic configuration of the article cleaning apparatus 1901 is the same as the configuration of the substrate processing apparatus 1701 according to the 25th embodiment. Therefore, in the 27th embodiment, the parts common to the 25th embodiment include The same reference numerals as those in FIG.
- the substrate processing apparatus 1901 After the substrate container 1602 (container body 1603) is put into the processing tank 1502, the processing liquid is stored in the processing tank 1502. Accordingly, the substrate container 1602 is immersed in the processing liquid, and the substrate container 1602 is cleaned by continuing such immersion processing for a predetermined period.
- the supply of the treatment liquid from the treatment liquid nozzle 1561 is continued intermittently as in the case of the twenty-fifth embodiment.
- the mode of the processing liquid discharged from the discharge port 1553 of the processing liquid nozzle 1561 is a continuous flow mode that leads to both the discharge port 1553 and the liquid level of the processing liquid stored in the inner tank 1007.
- the processing liquid is in a liquid-tight state in the nozzle pipe 1551 of the processing liquid nozzle 1561.
- soft X-rays are irradiated from the soft X-ray irradiation unit 1562 to the processing liquid flowing in the nozzle pipe 1551 (step S5 in FIG. 45B).
- the portion irradiated with soft X-rays (the processing liquid irradiation portion.
- the portion equivalent to the processing liquid irradiation portion 1054 according to the nineteenth embodiment shown in FIG. 46) is described above.
- a plasma state is formed in the irradiated portion of the processing liquid.
- the processing liquid is in a liquid-tight state in the nozzle pipe 1551, and the processing liquid discharged from the discharge port 1553 is the processing liquid stored in the discharge port 1553 and the inner tank 1007.
- the substrate container 1602 immersed in the processing liquid stored in the inner tank 1007 and the irradiated portion of the processing liquid are in the inner tank.
- the processing liquid stored in 1007, the above-described continuous flow processing liquid, and the processing liquid in the nozzle pipe 1551 are connected.
- the substrate container 1602 is positively charged, electrons from the irradiated part of the processing liquid are transferred to the substrate container 1602 due to a potential difference between the irradiation part of the processing liquid and the positively charged substrate container 1602.
- the processing liquid in the nozzle pipe 1551, the processing liquid in the continuous flow state, and the processing liquid stored in the inner tank 1007 are moved. Thereby, as a result of supplying a large amount of electrons to the substrate W, the positively charged substrate container 1602 (container body 1603) is neutralized.
- the substrate container 1602 may be negatively charged.
- electrons from the substrate container 1602 are stored in the inner tank 1007, It moves toward the positive ions at the irradiated portion of the processing liquid through the continuous flow processing liquid and the processing liquid in the nozzle pipe 1551.
- the electrons are removed from the substrate container 1602, and as a result, the negatively charged substrate container 1602 is neutralized.
- the substrate container 1602 can be prevented from being charged during the immersion treatment of the processing liquid. Further, even if the substrate container 1602 is charged before the immersion treatment, the charge on the substrate container 1602 can be removed (that is, static elimination).
- the lid 1604 and the support shelves 1605 and 1606 can be subjected to a cleaning process while removing electricity from the lid 1604 and the support shelves 1605 and 1606.
- the FOSB has been described as an example of the substrate container 1602
- the FOUP Front-Opening-Unified
- the substrate container 1602 include other types of substrate containers such as a SMIF (Standard Mechanical Interface) pod and OC (Open Cassette).
- the container is not limited to the one that accommodates the substrate W, but a medium container that accommodates a disk-shaped medium such as a CD, a DVD, or a blue disk, a lens L (see FIG. 54), a mirror, a diffraction grating, or the like.
- a component container that accommodates an optical component can be a processing target.
- the same configuration as in the 19th to 22nd and 24th embodiments may be adopted.
- processing similar to that described in the nineteenth to twenty-second and twenty-fourth embodiments is performed. That is, a container such as the substrate container 1602 is immersed in the processing liquid stored in the processing tank 1002, and the processing liquid stored in the processing tank 1002 or the inside communicates with the inside of the processing tank 1002 in parallel therewith.
- the soft X-rays from the soft X-ray units 1017, 1217, 1317, and 1417 are irradiated to the processing liquid existing in the pipes 1016, 1019, and 1423.
- electrodes 56 (FIGS. 1, 8, 10 (a), 11, 12, 14, 15 (a), FIG. 16, FIG. 24, and FIG. 28) are described as being provided, but a configuration in which the electrode 56 is not provided in the nozzle pipe may be employed. In this case, the power source 57 (see FIG. 3) is also omitted.
- an electrode 56 is provided at the tip of the water nozzle 409 of the twelfth embodiment and the tips of the cup nozzles 224 and 313 of the sixth and eleventh embodiments, and the electrode 56 is powered by a power source 57 (see FIG. 3). A voltage with respect to the device ground may be applied.
- the water supply pipes 204, 307, and 410 of the fourth, tenth, twelfth, and thirteenth embodiments are used.
- 533 and the branch pipes 222 and 312 of the sixth and eleventh embodiments may be provided with a liquid detection sensor (treatment liquid detection means) 101.
- the liquid detection sensor 101 is a sensor for detecting the presence or absence of DIW at a predetermined water detection position 102 in the water supply pipes 204, 307, 410, 533 and the branch pipes 222, 312.
- the water detection position 102 is set at the same position as or close to the opening (opening to which soft X-rays are irradiated) formed in the water supply pipes 204, 307, 410, 533 and the branch pipes 222, 312. Yes.
- a process equivalent to the process of FIG. 7 can also be executed.
- the discharge ports 202A, 216, 409A and 531A of the water nozzles 202, 212, 409 and 531 and the cup nozzle 224 of the sixth and eleventh embodiments are used.
- the fibrous substances according to the third embodiment can be provided in the discharge ports 224A and 313A of 313, respectively.
- the cup 17 is neutralized using DIW from the nozzles 224 and 313 provided at the ends of the branch pipes 222 and 312.
- the DIW of the second nozzle pipe 232 may be used for static elimination.
- the soft X-ray irradiation units 223 and 319 are disposed in the branch pipes 222 and 312. However, the soft X-ray irradiation units 223 and 319 are provided in the water supply pipes 204 and 307, respectively. It may be arranged.
- water supply units 230, 250, and 600 according to the seventh, eighth, and fourteenth embodiments have been described as adopting the same configuration as the water supply unit 100 according to the first embodiment, but the fourth embodiment.
- the structure equivalent to the water supply unit 200 (refer FIG. 1) which concerns on, and the water supply unit 220 which concerns on 5th Embodiment is also employable.
- the water supply unit 100 according to the first to third embodiments ( 1), a water supply unit 200 according to the fourth embodiment (see FIG. 11), and a water supply unit 220 according to the fifth embodiment may be employed.
- the case where the substrate W is rinsed on both sides has been described as an example.
- only the lower surface of the substrate W may be rinsed. Good.
- the soft X-ray irradiation apparatus 314 can be arranged in the processing chamber 3 in the first to tenth and twelfth embodiments.
- soft X-rays from the soft X-ray irradiation device 314 may be irradiated to the cup upper portion 19.
- DIW water
- a processing object substrate W, substrate container 602, second nozzle pipe 2302.
- the DIW is supplied from a plurality of nozzles.
- the upstream ends of a plurality of water supply pipes for supplying DIW to the nozzles 61, 202, 212, 306, 409 are connected to the water collecting pipe.
- the DIW existing in the water collecting pipe is irradiated with soft X-rays from the soft X-ray irradiation unit.
- a hydrophilic film 38 covering the outer surface 71B of the window member 71 for example, a hydrophilic DLC (Diamond Like Carbon) film, a hydrophilic fluororesin film, carbonized A hydrogen resin film or the like can be used.
- a hydrophilic DLC (Diamond Like Carbon) film for example, a hydrophilic fluororesin film, carbonized A hydrogen resin film or the like can be used.
- the window member 71 can be formed using polyimide resin. In this case, soft X-rays can be transmitted through the window member 71. Moreover, since the polyimide resin is excellent in chemical stability, the window member 71 can be continuously used for a long time. In this case, it is not necessary to cover the outer surface 71B with the hydrophilic film 38.
- DIW has been exemplified as an example of water that is irradiated with soft X-rays and discharged from the discharge port.
- the present invention is not limited to DIW, but carbonated water, electrolytic ionic water, hydrogen-dissolved water.
- ozone-dissolved water and dilute concentration for example, about 10 ppm to 100 ppm
- hydrochloric acid water can also be employed.
- a chemical solution (diluted chemical solution) can be adopted as a processing solution irradiated with soft X-rays and discharged from the discharge port.
- a chemical solution hydrofluoric acid diluted to a predetermined concentration, BHF (Bufferd HF), APM (ammonia-hydrogen peroxide mixture), TMAH (tetramethylammonium hydroxide aqueous solution), ammonia Water, HPM (hydrochloric acid / hydrogen-peroxide mixture), etc.
- BHF Bufferd HF
- APM ammonia-hydrogen peroxide mixture
- TMAH tetramethylammonium hydroxide aqueous solution
- HPM hydrochloric acid / hydrogen-peroxide mixture
- the inside of the first pipe is performed in parallel with the supply of the processing liquid. It is also possible to irradiate soft X-rays to the processing solution that is distributed.
- other films can be used as the water-repellent film formed on the outer surface 735B of the irradiation window 735 and covering the outer surface 735B.
- a water-repellent DLC (Diamond-Like Carbon) film 851 (diamond-like carbon film) can be employed.
- the film thickness of the DLC film 851 is 10 ⁇ m or less, and preferably about 1 to 2 ⁇ m.
- silicon (Si) ions are implanted into the outer surface 735B of the irradiation window 735 by ion implantation or the like, and then carbon (C) is implanted into the outer surface 735B of the irradiation window 735 by sputtering or the like.
- Ions are implanted.
- the outer surface 735B of the irradiation window 735 is modified.
- a deposited film of DLC is formed on the outer surface 735B of the irradiation window 735 by plasma CVD or the like, whereby a DLC film 851 is formed.
- Silicon (Si) ion implantation, carbon (C) ion implantation, and DLC deposition are performed in a low temperature environment of room temperature to 150 ° C.
- DLC film 851 formed by such a method has water repellency.
- plasma ion assist method has water repellency.
- water-repellent DLC film 851 is formed on the outer surface 735B of the irradiation window 735, water droplets can be prevented from adhering to the outer surface 735B of the irradiation window 735. As a result, clouding of the irradiation window 735 can be suppressed or prevented.
- the DLC film 851 has high adhesion even under a high temperature environment. Therefore, it is possible to reliably prevent the peeled DLC from contaminating the irradiation window 735.
- the DLC is deposited in a low temperature environment, the temperature drop after the deposition is small, and the stress hardly remains in the DLC film 851. Thereby, it is possible to form a film that is difficult to break (high durability).
- an amorphous fluororesin film 861 having water repellency can be adopted as the water repellent film.
- the amorphous fluororesin film 861 is made of amorphous fluorine made of, for example, Cytop resin (trade name).
- the film thickness of the amorphous fluororesin film 861 is 50 ⁇ m or less, and preferably about 5 to 10 ⁇ m.
- the coating In the fifteenth to eighteenth embodiments, embodiments of DLC and amorphous fluororesin were described as the coating.
- the present coating is easy to transmit soft X-rays and has heat resistance of about several hundred degrees Celsius.
- the shielding member may be provided integrally with the soft X-ray irradiation head 841.
- the shielding member may be provided separately from the irradiation head 841. In this case, it may be attached to an arm that can be swung in a horizontal plane above the spin chuck 704 so as to be movable on the spin chuck 704 by the swing of this arm.
- the X-ray irradiation from the soft X-ray irradiation heads 706 and 841 and the X-ray irradiation unit 834 is stopped. It may be.
- the gas nozzle 727 has been described as ejecting a gas having a temperature higher than normal temperature, but normal temperature gas may be ejected from the gas nozzle 727.
- the configuration in which the sheet-like heater 744 as the heat generating member is arranged is adopted, but another heat source may be provided as the heat generating member.
- the irradiation window 735 may be provided without being limited to the periphery of the opening 728 such as the lower wall 726 ⁇ / b> A of the cover 726.
- the structure provided in both the lower wall 726A of the cover 726 and the irradiation window 735 may be sufficient.
- a configuration in which a heating member such as the heater 744 is not provided around the irradiation window 735 may be employed.
- the movable soft X-ray irradiation heads 706 and 841 and the movable X-ray irradiation unit 834 are provided as X-ray irradiation means.
- the X-ray irradiation means may be disposed so as to be fixedly opposed to the substrate W held by the spin chuck 704. In this case, it is necessary that the soft X-rays irradiated from the fixed X-ray irradiation unit are irradiated to the entire area of the substrate W.
- DIW is given as an example of water supplied to the substrate W in parallel with the soft X-ray irradiation.
- the water is not limited to DIW, but carbonated water, electrolytic ionic water, hydrogen dissolved. Any of water, ozone-dissolved water and hydrochloric acid water having a diluted concentration (for example, about 10 ppm to 100 ppm) can also be employed.
- the case where soft X-rays are applied to the surface of the substrate W in parallel with the supply of water for the rinsing process has been described as an example.
- the supply of a chemical solution diluted chemical solution
- soft X-ray irradiation can be performed.
- the chemical solution hydrofluoric acid diluted to a predetermined concentration, BHF (BufferdAHF), APM (ammonia-hydrogen peroxide mixture), TMAH (tetramethylammonium hydroxide aqueous solution) ), Ammonia water, HPM (hydrochloric acid / hydrogen peroxide mixture).
- the inside of the first pipe is performed in parallel with the supply of the processing liquid. It is also possible to irradiate soft X-rays to the processing solution that is distributed.
- the soft X-rays are applied to the surface of the substrate W in parallel with the supply of water. Can also be irradiated.
- the case where the processing is performed on the substrate W on which the oxide film is formed is taken as an example. ) May be performed on the substrate W on which is formed.
- all the processing liquid in the processing tank 1002 may be discharged after the substrate immersion processing, and the post-processing shower rinsing may be performed from the processing liquid nozzle 1003 to the substrate W.
- the contaminants that remain attached to the substrate W even after the immersion treatment can be washed away, and are prevented from reattaching to the substrate W.
- the heater 25 for heating may be interposed.
- the circulation mechanism 1005 (see FIG. 44) may be omitted.
- the processing liquid stored in the processing tanks 1002 and 1502 is not circulated, and the processing liquid recovered in the outer tank 1008 is waste liquid or recovered.
- a configuration in which a circulation mechanism 1005 (see FIG. 44) is provided may be employed.
- the processing liquid stored in the processing tank 1502 is circulated, and the processing liquid recovered in the outer tank 1008 is supplied again into the processing tank 1502.
- the process of rubbing and cleaning the processing object immersed in the processing liquid with a brush can be executed in parallel.
- the outer tub 1008 is not essential.
- the configuration of the outer tank 1008 can be omitted.
- hydrophilic film 1038 covering the outer surface 71B of the window member 1071 for example, a hydrophilic DLC (Diamond Like Carbon) film, a hydrophilic fluororesin film, or carbonized A hydrogen resin film or the like can be used.
- a hydrophilic DLC (Diamond Like Carbon) film for example, a hydrophilic fluororesin film, or carbonized A hydrogen resin film or the like can be used.
- the window member 1071 can also be formed using a polyimide resin. In this case, soft X-rays can be transmitted through the window member 1071. In addition, since the polyimide resin is excellent in chemical stability, the window member 1071 can be used for a long time. In this case, it is not necessary to cover the outer surface 71B with the hydrophilic film 1038.
- a voltage may be applied from the power source 1557 to the electrode 1556 in conjunction with the soft X-ray irradiation by the soft X-ray irradiation unit 1562.
- the electrode 1556 is preferably charged to a positive charge.
- the electrons generated in the irradiated portion of the treatment liquid by the soft X-ray irradiation due to the positive charge of the electrode 1556 are pulled toward the electrode 1556 and moved to the tip of the nozzle pipe 1551 where the electrode 1556 is provided. Become. That is, a large amount of electrons can be pulled toward the discharge port 1553 of the processing liquid nozzle 1561. Thereby, the movement of the electrons to the substrate W side can be promoted.
- X-rays that emit “soft X-rays” having a relatively long wavelength are used as the X-ray irradiating means.
- Short “hard X-rays” (0.001 nm to 0.1 nm) can also be used.
- a surface of the apparatus operator side is covered with a lead plate having a considerable thickness, for example, a shielding structure for shielding leakage of X-rays to the outside of the apparatus is provided, Alternatively, it is desirable to take measures such as prohibiting an operator from entering the periphery of the apparatus during X-ray irradiation.
- the substrate W has been described by taking a semiconductor wafer or a glass substrate for a liquid crystal display device as an example.
- the substrate W can also be a plasma display substrate, a FED (Field Emission Display) substrate, an OLED (organic electroluminescence).
- SiC, quartz, sapphire, a plastic, a ceramic, etc. other than silicon and glass can be illustrated.
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Abstract
Description
そこで、この発明の目的は、処理対象物の帯電防止または除電を図りつつ、当該処理対象物に処理液を供給できる処理液供給装置および処理液供給方法を提供することである。
この方法によれば、吐出口から吐出された処理液は、基板の上面に供給され、当該基板の上面に接液する。吐出口から吐出される処理液が、吐出口と基板上面との間で液状に繋がっており、処理対象物と処理液の照射部分とが、処理液を介して繋がっている。そのため、基板の上面が正に帯電すると、処理液の照射部分と、正に帯電している基板の上面との間の電位差で、処理液の照射部分からの電子が、基板の上面に接液している処理液に向けて、液状に繋がっている処理液を伝って移動する。これにより、基板の上面に接液している処理液が多量の電子を有するようになるので、正に帯電している基板の上面を除電できる。
、多数本の紐状繊維を束ねて構成した繊維束(繊維状物質)65が取り付けられている。繊維束65は、第1ノズル配管51の長手方向に沿う中心軸線を有する円柱状をなしている。第1ノズル配管51の吐出口53からの繊維束65の突出長さは、スピンチャック4に保持された基板Wと吐出口53との間の間隔と同程度に設定されている。
第2ノズル配管232がホームポジションに配置された状態で、廃液バルブ243が閉じられた状態で、水供給ユニット230の水ノズル61からDIWが吐出される。これにより、待機ポッド237の液溜め溝239にDIWが溜められる。そして、液溜め溝239に溜められたDIWによって、第2ノズル配管232(の水平部233)の周方向の全域が浸漬される。
このとき、DIWの液膜63とDIWの照射部分54とが、DIWを介して繋がっている。
第1工程:バルブ664を調節して、水ノズル661の出口667AからDIW(この場合、導電率:1μS/cm以下)を、液滴状(非連続流状)で滴下させる。液滴状とは、液滴と次の液滴とが繋がらない状態をいう。
第2工程:帯電プレートモニタ655の金属プレート671を介して帯電体Eを帯電させ、軟X線照射ユニット662の軟X線発生器をオン/オフさせて、そのときに帯電体Eの電位が+/-4.5kV →+/-3.5kVまで減衰する時間(除電時間)を、帯電プレートモニタ655と、レコーダ656とを用いて計測した。
第3工程:次いで、バルブ664を調節して、水ノズル661の出口667AからDIWを一定流量(0.77L/minまたは0.08L/min)で連続流状(液柱状に流れている状態)で流下させる。このとき、水ノズル661の高さを可変とし、水ノズル661の出口667Aから帯電体Eの上端までの距離が、55mm、1000mmおよび3000mmである場合をそれぞれ計測した。距離が1000mmおよび3000mmの場合は、コイル状に巻回されたφ6×4mmの塩化ビニールチューブを水ノズル661の先端に取り付けた。
第4工程:帯電プレートモニタ655の金属プレート671を介して容器652内の帯電体Eを帯電させ、軟X線発生器をオン/オフさせて、そのときに帯電体Eの電位がが+/-1kV →+/-0.1kVまで減衰する時間(除電時間)を、帯電プレートモニタ655と、レコーダ656とを用いて計測した。この実験結果を、表1~表3に示す。
次に、X線照射ヘッドからの軟X線の照射によって、シリコンウエハやガラス基板等の基板を除電できることを確認するために、除電試験および電離試験という2つの試験を行った。この試験の内容および結果について以下説明する。
(1)除電試験
水槽903への水の供給と並行して、帯電プレートモニタCPMにより、液中の下メッシュ912を+/-1kVまたは+/-5kVに帯電させた。そして、軟X線照射ヘッド904をオンさせて水槽903に溜められたDIWに軟X線を照射し、その照射開始から、下メッシュ912の電位が+/-100kVになるまでの時間(除電時間)を計測した。
(2)電離試験
上および下メッシュ911,912間に、超絶縁抵抗計(横河ヒューレット・パッカード(株)製 Model 4329A)を接続し、軟X線照射の有無による2枚のメッシュ911,912間の電気抵抗の変化を計測した。
IWの電離に起因して、DIWに接液する帯電体を良好に除電できることがわかる。
この出願は、2012年9月27日に日本国特許庁に提出された特願2012-215293号、2012年9月27日に日本国特許庁に提出された特願2012-215294号、2013年9月19日に日本国特許庁に提出された特願2013-194293号および2013年9月19日に日本国特許庁に提出された特願2013-194294号に対応しており、この出願の全開示はここに引用により組み込まれるものとする。
4 スピンチャック(基板保持回転手段)
6 一体型ヘッド
6A 一体型ヘッド
6B 一体型ヘッド
17 カップ(液受け部材)
25 軟X線発生器(X線発生器)
26 カバー
27 気体ノズル(気体供給手段)
35 照射窓
37 気体バルブ(気体供給手段)
38 親水性皮膜(皮膜)
40 制御装置(X線照射制御手段)
51 第1ノズル配管(処理液配管)
51A 第1ノズル配管(処理液配管)
52 第1開口(開口、X線の照射位置)
52A 第3開口(開口、X線の照射位置)
53 吐出口
56 電極
57 電源
61 水ノズル(処理液ノズル)
62 軟X線照射ユニット(X線照射手段)
65 繊維束(繊維状物質)
71 窓部材
71B 外表面(閉塞窓における処理液が流通する側の壁面)
100 水供給ユニット(処理液供給装置)
101 液検出センサ(処理液検出手段)
200 水供給ユニット(処理液供給装置)
201 基板処理装置
202A 吐出口
203 軟X線照射ユニット(X線照射手段)
204 水供給配管(処理液配管)
211 基板処理装置
216 吐出口
220 水供給ユニット(処理液供給装置)
221 基板処理装置
222 第1分岐配管(分岐配管)
224A 吐出口(液受け用吐出口)
230 水供給ユニット(処理液供給装置)
231 基板処理装置
232 第2ノズル配管(第2配管)
250 水供給ユニット(処理液供給装置)
251 基板処理装置
260 水供給ユニット(処理液供給装置)
261 基板処理装置
262 第2ノズル配管(第2配管)
276 吐出口
300 水供給ユニット(処理液供給装置)
301 基板処理装置
306A 吐出口
307 水供給配管(処理液配管)
309 軟X線照射ユニット(X線照射手段)
310 水供給ユニット(処理液供給装置)
311 基板処理装置
312 第2分岐配管(分岐配管)
313A 吐出口(液受け用吐出口)
400 水供給ユニット(処理液供給装置)
401 基板処理装置
402 スピンチャック(基板保持回転手段)
404 スピン軸(支持部材)
405 スピンベース(支持部材)
409A 吐出口
410 水供給配管(処理液配管)
412 軟X線照射ユニット(X線照射手段)
500 水供給ユニット(処理液供給装置)
501 基板処理装置
504 コロ搬送ユニット(基板保持搬送手段)
531A 吐出口
533 水供給配管(処理液配管)
534 軟X線照射ユニット(X線照射手段)
600 水供給ユニット(処理液供給装置)
602 基板収容器(収容器)
701 基板処理装置
704 スピンチャック(基板保持手段)
705 水ノズル(水供給手段)
706 軟X線照射ヘッド(X線照射手段)
714 水バルブ(水供給手段)
719 揺動駆動機構(移動手段)
720 昇降駆動機構(移動手段)
725 X線発生器
726 カバー
727 気体ノズル(気体供給手段)
728 開口
735 照射窓
737 気体バルブ(気体供給手段)
738 ポリイミド樹脂皮膜
740 制御装置(制御手段)
744 ヒータ(発熱部材)
820 基板処理装置
821 水ノズル(水供給手段)
830 基板処理装置
833 水ノズル(水供給手段)
834 軟X線照射ユニット(X線照射手段)
840 基板処理装置
841 軟X線照射ヘッド(X線照射手段)
842 遮蔽部材(遮蔽板部)
851 DLC皮膜(ダイヤモンドライクカーボンの皮膜)
861 アモルファスフッ素樹脂皮膜
1001 基板処理装置(処理液処理装置)
1002 処理槽
1007 内槽
1008 外槽
1016 分岐配管(処理液供給配管)
1017 軟X線照射ユニット(X線照射手段)
1019 帰還配管(オーバーフロー配管)
1025 軟X線発生器(X線発生器)
1026 カバー
1027 気体ノズル(気体供給手段)
1035 照射窓
1037 気体バルブ(気体供給手段)
1038 親水性皮膜(皮膜)
1052 開口
1071 窓部材
1071B 外表面(壁面)
1201 基板処理装置(処理液処理装置)
1217 軟X線照射ユニット(X線照射手段)
1301 基板処理装置(処理液処理装置)
1307 内槽
1317 軟X線照射ユニット(X線照射手段)
1321 開口
1401 基板処理装置(処理液処理装置)
1407 内槽
1417 軟X線照射ユニット(X線照射手段)
1421 開口
1423 配管
1602 基板収容器(処理対象物)
C 回転軸線
L レンズ
W 基板(処理対象物)
Claims (55)
- 吐出口から処理液を吐出して、この処理液を処理対象物に供給するための処理液供給装置であって、
処理液が内部を流通可能な第1配管であって、当該内部が前記吐出口に連通する第1配管と、
前記第1配管内に存在する処理液に、X線を照射するX線照射手段とを含む、処理液供給装置。 - 前記第1配管は、その管壁に開口を有し、
前記開口は、X線が透過可能な材料を用いて形成された窓部材にて閉塞されており、
前記X線照射手段は、前記第1配管内に存在している処理液に、前記窓部材を介してX線を照射する、請求項1に記載の処理液供給装置。 - 前記窓部材は、ベリリウムまたはポリイミド樹脂を用いて形成されている、請求項2記載の処理液供給装置。
- 前記窓部材における処理液が存在する側の壁面は、皮膜によりコーティングされている、請求項2または3に記載の処理液供給装置。
- 前記皮膜は、ポリイミド樹脂、ダイヤモンドライクカーボン、フッ素樹脂および炭化水素樹脂のうちの1つ以上の材質を含む皮膜である、請求項4に記載の処理液供給装置。
- 前記X線照射手段は、前記窓部材に対向して配置される照射窓を有し、X線を発生するとともに、発生したX線を前記照射窓から照射するX線発生器を含む、請求項2~5のいずれか一項に記載の処理液供給装置。
- 前記X線照射手段は、
前記X線発生器の周囲を、当該X線発生器と間隔を空けて取り囲むカバーと、
前記カバーの内部に気体を供給する気体供給手段とをさらに含む、請求項6に記載の処理液供給装置。 - 前記第1配管は、前記吐出口に向けて処理液が内部を流通する処理液配管を含み、
前記X線照射手段は、前記第1配管内を流通している処理液に前記X線を照射する、請求項1~7のいずれか一項に記載の処理液供給装置。 - 前記処理液供給装置は、前記吐出口に向けて処理液が内部を流通する処理液配管をさらに含み、
前記第1配管は、前記処理液配管から分岐する分岐配管を含む、請求項1~7のいずれか一項に記載の処理液供給装置。 - 前記吐出口に配置され、当該吐出口から吐出される処理液が伝って流れる繊維状物質をさらに含む、請求項1~9のいずれか一項に記載の処理液供給装置。
- 前記第1配管における前記X線の照射位置よりも、処理液流通方向の下流側に配置された電極と、
前記電極に対して電圧を印加する電源とをさらに含む、請求項1~10のいずれか一項に記載の処理液供給装置。 - 前記電極は、前記第1配管の先端部に配置されている、請求項11に記載の処理液供給装置。
- 前記第1配管において、前記X線の前記照射位置における処理液の有無を検出するための処理液検出手段と、
前記照射位置に処理液が存在するときには、前記X線照射手段によるX線の照射を実行するとともに、前記照射位置に処理液が存在しないときには、前記X線照射手段によるX線の照射を行わないX線照射制御手段とをさらに含む、請求項1~12のいずれか一項に記載の処理液供給装置。 - 基板を保持する基板保持手段と、
請求項1~13のいずれか一項に記載の処理液供給装置とを含み、
前記吐出口から吐出された処理液を前記基板の主面に供給する、基板処理装置。 - 前記基板保持手段は、基板を水平姿勢に保持しつつ、鉛直な所定の回転軸線周りに回転させる基板保持回転手段を含み、
前記基板処理装置は、前記基板保持回転手段の周囲を包囲する筒状の液受け部材をさらに含み、
前記処理液供給装置は、前記吐出口に向けて処理液が内部を流通する処理液配管をさらに含み、
前記処理液供給装置の前記第1配管は、前記処理液配管から分岐する分岐配管を含み、
前記分岐配管は、前記液受け部材に向けて処理液を吐出するための液受け用吐出口を有する、請求項14に記載の基板処理装置。 - 前記基板保持手段は、基板を水平姿勢に保持しつつ、鉛直な所定の回転軸線周りに回転させる基板保持回転手段を含み、
前記基板保持回転手段は、前記基板の下面の少なくとも一部と接触して、当該基板を水平姿勢に支持する支持部材を有し、
前記支持部材は多孔質材料を用いて形成されており、
前記吐出口から吐出された処理液が前記支持部材に供給される、請求項14または15に記載の基板処理装置。 - 前記基板保持手段は、前記基板を保持しながら、当該基板を所定の搬送方向に向けて搬送する基板保持搬送手段を含む、請求項14に記載の基板処理装置。
- 前記基板保持搬送手段は、前記基板を、前記搬送方向に沿い、かつ水平面に対し傾斜する姿勢に保持しつつ搬送する、請求項17に記載の基板処理装置。
- 処理液供給装置の吐出口から処理液を吐出させ、この処理液を処理対象物に供給する処理液供給方法であって、
前記吐出口を、前記処理対象物に対向して配置する対向配置工程と、
前記吐出口に連通する第1配管の内部に存在する処理液にX線を照射する第1X線照射工程と、
前記第1X線照射工程と並行して、前記吐出口から処理液を吐出させる処理液吐出工程とを含み、
前記処理液吐出工程では、前記吐出口と前記処理対象物との間で処理液が液状に繋がっている、処理液供給方法。 - 前記処理液吐出工程では、前記吐出口から吐出される処理液が、当該吐出口と前記処理対象物との双方に繋がる連続流状をなしている、請求項19に記載の処理液供給方法。
- 前記処理対象物は、内部を液が流通する第2配管である、請求項19または20に記載の処理液供給方法。
- 前記処理対象物は、物品を収容するための収容器である、請求項19または20に記載の処理液供給方法。
- 処理液供給装置の吐出口から吐出される処理液を用いて基板を処理する基板処理方法であって、
前記吐出口を、基板保持手段に保持されている基板の主面に対向して配置する対向配置工程と、
前記吐出口に連通する第1配管の内部に存在する処理液にX線を照射する第1X線照射工程と、
前記第1X線照射工程と並行して、前記吐出口から処理液を吐出させる処理液吐出工程とを含み、
前記処理液吐出工程では、前記吐出口と前記基板の主面との間で処理液が液状に繋がっている、基板処理方法。 - 前記処理液吐出工程では、前記吐出口から吐出される処理液が、当該吐出口と前記基板の主面との双方に繋がる連続流状をなしている、請求項23に記載の基板処理方法。
- 前記基板は、前記基板保持手段によって水平姿勢に保持されており、
前記対向配置工程は、前記吐出口を、前記基板保持手段に保持されている基板の上面に対向するように配置する工程を含む、請求項23または24に記載の基板処理方法。 - 前記基板は、前記基板保持手段によって水平姿勢に保持されており、
前記対向配置工程は、前記吐出口を、前記基板保持手段に保持されている基板の下面に対向するように配置する工程を含み、
前記基板処理方法は、
前記処理液吐出工程に並行して実行され、前記基板を、鉛直な所定の回転軸線まわりに回転させる基板回転工程と、
前記処理液吐出工程および前記基板回転工程に並行して、前記基板の上面に処理液を供給する上面処理液供給工程とをさらに含む、請求項23または24に記載の基板処理方法。 - 前記処理液吐出工程の終了後に実行される液切り処理または乾燥処理に並行して実行され、前記基板の主面にX線を照射する第2X線照射工程をさらに含む、請求項23~26のいずれか一項に記載の基板処理方法。
- 基板を保持する基板保持手段と、
前記基板保持手段に保持されている基板の表面にX線を照射するX線照射手段と、
前記基板保持手段に保持されている基板の表面に処理液を供給する処理液供給手段と、
基板の表面に対する処理液の供給とX線の照射とが並行して行われるように、前記X線
照射手段および前記処理液供給手段を制御する制御手段とを含む、基板処理装置。 - 前記X線照射手段は、照射窓を有し、X線を発生させるとともに、発生したX線を前記
照射窓から照射するX線発生器を備えている、請求項28に記載の基板処理装置。 - 前記X線発生器の周囲を、間隔を空けて取り囲むカバーをさらに含み、
前記カバーには、前記照射窓に対向する部分に開口が形成されている、請求項29に記載の基板処理装置。 - 前記カバーの内部に気体を供給する気体供給手段をさらに含む、請求項30に記載の基板
処理装置。 - 前記気体供給手段は、常温よりも高温の気体を供給する、請求項31に記載の基板処理装置。
- 前記照射窓の外表面は、皮膜によりコーティングされている、請求項29~32のいずれか一項に記載の基板処理装置。
- 前記皮膜は、ポリイミド樹脂の皮膜である、請求項33に記載の基板処理装置。
- 前記皮膜は、ダイヤモンドライクカーボンの皮膜である、請求項33に記載の基板処理装置。
- 前記皮膜は、アモルファスフッ素樹脂の皮膜である、請求項33に記載の基板処理装置。
- 前記カバーにおける前記開口の周囲および前記照射窓の少なくとも一方に、発熱部材が
配設されている、請求項30~36のいずれか一項に記載の基板処理装置。 - 前記基板保持手段に保持される基板の表面に対向配置され、当該基板の表面上の空間を
その周囲から遮蔽するための遮蔽部材をさらに含み、
前記遮蔽部材は、前記照射窓から照射されたX線を当該基板の表面上の空間に留めてお
くためのものである、請求項29~37のいずれか一項に記載の基板処理装置。 - 前記遮蔽部材は、前記カバーと一体移動可能に設けられている、請求項38に記載の基板処理装置。
- 前記X線照射手段を、前記基板保持手段によって保持された基板の表面に沿って移動さ
せる移動手段をさらに含む、請求項28~39のいずれか一項に記載の基板処理装置。 - 前記処理液は水である、請求項28~40のいずれか一項に記載の基板処理装置。
- 基板保持手段に保持された基板の表面に処理液を供給する処理液供給工程と、
前記処理液供給工程と並行して、前記基板保持手段に保持された基板の表面にX線を照
射するX線照射工程とを含む、基板処理方法。 - 処理液中に処理対象物を浸漬して処理を行う処理液処理装置であって、
処理液を貯留し、その処理液中に処理対象物を浸漬させる処理槽と、
前記処理槽に貯留された処理液、または処理液が内部を流通可能な配管であって、当該内部が前記処理槽内に連通する配管内に存在する処理液に、X線を照射するX線照射手段とを含む、処理液処理装置。 - 前記配管の管壁または前記処理槽の壁は、開口を有し、
前記開口は、X線が透過可能な材料を用いて形成された窓部材にて閉塞されており、
前記X線照射手段は、前記窓部材を介してX線を照射する、請求項43に記載の処理液処理装置。 - 前記窓部材は、ベリリウムまたはポリイミド樹脂を用いて形成されている、請求項44記載の処理液処理装置。
- 前記窓部材における処理液が存在する側の壁面は、皮膜によりコーティングされている、請求項44または45に記載の処理液処理装置。
- 前記皮膜は、ポリイミド樹脂、ダイヤモンドライクカーボン、フッ素樹脂および炭化水素樹脂のうちの1つ以上の材質を含む皮膜である、請求項46に記載の処理液処理装置。
- 前記X線照射手段は、前記窓部材に対向して配置される照射窓を有し、X線を発生するとともに、発生したX線を前記照射窓から照射するX線発生器を含む、請求項44~47のいずれか一項に記載の処理液処理装置。
- 前記X線照射手段は、
前記X線発生器の周囲を、当該X線発生器と間隔を空けて取り囲むカバーと、
前記カバーの内部に気体を供給する気体供給手段とをさらに含む、請求項48に記載の処理液処理装置。 - 前記配管は、前記処理槽内と連通し、前記処理槽内に処理液を供給するための処理液供給配管を含み、
前記X線照射手段は、前記処理液供給配管を流通している処理液に前記X線を照射する、請求項43~49のいずれか一項に記載の処理液処理装置。 - 前記処理槽は、処理液を貯留し、その処理液中に処理対象物を浸漬させる内槽と、 前記内槽から溢れる処理液を回収する外槽とを含み、
前記配管は、前記外槽に回収された処理液が流通するオーバーフロー配管を含み、
前記X線照射手段は、前記オーバーフロー配管内を流通している処理液に前記X線を照射する、請求項43~49のいずれか一項に記載の処理液処理装置。 - 前記処理槽は、処理液を貯留し、その処理液中に処理対象物を浸漬させる内槽と、 前記内槽から溢れる処理液を回収する外槽とを含み、
前記X線照射手段は、前記内槽に貯留されている処理液に前記X線を照射する、請求項43~49のいずれか一項に記載の処理液処理装置。 - 前記処理槽は、処理液を貯留し、その処理液中に処理対象物を浸漬させる内槽と、 前記内槽から溢れる処理液を回収する外槽とを含み、
前記配管は、前記内槽内に内部が連通する配管を含む、請求項43~49のいずれか一項に記載の処理液処理装置。 - 処理槽に貯留された処理液中に処理対象物を浸漬させる処理対象物浸漬工程と、
前記処理対象物浸漬工程に並行して、前記処理槽に貯留された処理液、または処理液が内部を流通可能な配管であって、当該内部が前記処理槽内に連通する配管内に存在する処理液に、X線を照射するX線照射工程とを含む、処理液処理方法。 - 処理槽に貯留された処理液中に処理対象物を浸漬させる処理対象物浸漬工程と、
前記処理対象物浸漬工程に並行して、前記処理槽内に向けて吐出口から処理液を吐出させる処理液吐出工程と、
前記処理液吐出工程に並行して、前記吐出口に連通する配管の内部に存在する処理液にX線を照射するX線照射工程とを含み、
前記処理液吐出工程では、前記吐出口と前記処理槽に溜められている処理液の液面との間で処理液が液状に繋がっている、処理液処理方法。
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