WO2023149322A1 - プラズマ処理装置 - Google Patents
プラズマ処理装置 Download PDFInfo
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- WO2023149322A1 WO2023149322A1 PCT/JP2023/002362 JP2023002362W WO2023149322A1 WO 2023149322 A1 WO2023149322 A1 WO 2023149322A1 JP 2023002362 W JP2023002362 W JP 2023002362W WO 2023149322 A1 WO2023149322 A1 WO 2023149322A1
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- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/32009—Arrangements for generation of plasma specially adapted for examination or treatment of objects, e.g. plasma sources
- H01J37/32082—Radio frequency generated discharge
- H01J37/321—Radio frequency generated discharge the radio frequency energy being inductively coupled to the plasma
- H01J37/3211—Antennas, e.g. particular shapes of coils
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/44—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating
- C23C16/50—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating using electric discharges
- C23C16/505—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating using electric discharges using radio frequency discharges
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/44—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating
- C23C16/50—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating using electric discharges
- C23C16/505—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating using electric discharges using radio frequency discharges
- C23C16/509—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating using electric discharges using radio frequency discharges using internal electrodes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/32431—Constructional details of the reactor
- H01J37/32532—Electrodes
- H01J37/3255—Material
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/32431—Constructional details of the reactor
- H01J37/32532—Electrodes
- H01J37/32568—Relative arrangement or disposition of electrodes; moving means
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/32431—Constructional details of the reactor
- H01J37/32715—Workpiece holder
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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
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/302—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to change their surface-physical characteristics or shape, e.g. etching, polishing, cutting
- H01L21/306—Chemical or electrical treatment, e.g. electrolytic etching
- H01L21/3065—Plasma etching; Reactive-ion etching
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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
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/31—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to form insulating layers thereon, e.g. for masking or by using photolithographic techniques; After treatment of these layers; Selection of materials for these layers
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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
- H01L21/67063—Apparatus for fluid treatment for etching
- H01L21/67069—Apparatus for fluid treatment for etching for drying etching
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H1/00—Generating plasma; Handling plasma
- H05H1/24—Generating plasma
- H05H1/46—Generating plasma using applied electromagnetic fields, e.g. high frequency or microwave energy
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2237/00—Discharge tubes exposing object to beam, e.g. for analysis treatment, etching, imaging
- H01J2237/32—Processing objects by plasma generation
- H01J2237/33—Processing objects by plasma generation characterised by the type of processing
- H01J2237/332—Coating
- H01J2237/3321—CVD [Chemical Vapor Deposition]
Definitions
- the present disclosure relates to a plasma processing apparatus.
- a plasma processing apparatus that generates inductively coupled plasma in a vacuum vessel using an antenna placed inside the vacuum vessel.
- the plasma processing apparatus performs a predetermined plasma process using generated plasma, such as film formation by chemical vapor deposition or sputtering, or etching, etc., on a substrate to be processed.
- Japanese Unexamined Patent Publication Japanese Unexamined Patent Publication No. 8-8232
- a plasma processing apparatus it is important to appropriately control the movement of charged particles contained in the plasma generated during plasma processing in a vacuum vessel (processing chamber). This is because, in a plasma processing apparatus, the quality of plasma processing is affected according to the behavior of the charged particles with respect to the object to be processed.
- the present disclosure has been made in view of the above problems, and aims to provide a plasma processing apparatus capable of appropriately controlling the motion of charged particles.
- a plasma processing apparatus including a processing chamber, a stage on which an object to be processed is installed inside the processing chamber; An antenna for generating an inductively coupled plasma inside the processing chamber and an internal electrode to which a predetermined potential is applied are provided.
- FIG. 1 is a diagram illustrating a specific configuration example of an internal electrode shown in FIG. 1;
- FIG. It is a figure explaining the function of the said internal electrode.
- FIG. 2 is a diagram illustrating the structure of the plasma processing apparatus which concerns on Embodiment 2 of this indication.
- FIG. 1 is a diagram illustrating the configuration of a plasma processing apparatus 1 according to Embodiment 1 of the present disclosure.
- FIG. 2 is a diagram for explaining a specific configuration example of the internal electrode 8 shown in FIG.
- the plasma processing a plasma apparatus for forming a film on the substrate H1 to be processed by a plasma CVD (Chemical Vapor Deposition) method using inductively coupled plasma will be exemplified. do.
- the plasma processing apparatus 1 of the present disclosure can also be applied to a plasma processing apparatus that performs a sputtering process for forming a predetermined object on a substrate H1 to be processed as a plasma process, for example.
- the plasma processing apparatus 1 of the present disclosure can also be applied to a plasma processing apparatus that performs an etching process or an ashing process for removing a predetermined substance from the substrate H1 to be processed.
- the plasma processing apparatus 1 of Embodiment 1 includes a stage 3 as a stage on which a substrate to be processed H1 as an object to be processed is installed.
- a plasma processing apparatus 1 includes a processing chamber 2 , and in the processing chamber 2 , predetermined plasma processing is performed on a substrate to be processed H ⁇ b>1 placed on a stage 3 .
- the plasma processing apparatus 1 includes a load lock chamber (not shown) for loading/unloading the substrate H1 to/from the outside of the plasma processing apparatus 1 .
- the plasma processing apparatus 1 also includes a control section (not shown) that controls each section of the plasma processing apparatus 1 .
- the control unit includes, for example, a CPU (Central Processing Unit), RAM (Random Access Memory), ROM (Read Only Memory), etc., and is a functional block that controls each component according to information processing.
- the substrate H1 to be processed is placed on the stage 3 of the processing chamber 2 from the load lock chamber by a transport mechanism (not shown). Further, the substrate to be processed H1 is transported from the stage 3 of the processing chamber 2 to the inside of the load lock chamber by the transport mechanism.
- the substrate H1 to be processed can be, for example, a glass substrate or a synthetic resin substrate used for a liquid crystal panel display, an organic EL (Electro Luminescence) panel display, or the like. Also, the substrate to be processed H1 may be a semiconductor substrate used for various purposes.
- the plasma processing apparatus 1 forms a predetermined film such as a barrier (moisture-proof) film on the substrate H1 to be processed by the predetermined plasma processing.
- the processing chamber 2 is configured using a grounded vacuum vessel, and in a state in which the inside of the vacuum vessel is maintained at a predetermined degree of vacuum, the substrate to be processed is subjected to a predetermined plasma processing under the control of the control unit. It is designed to be applied to H1.
- the stage 3 is also grounded. In addition to this explanation, it is preferable to control the potential of the stage 3 as shown in Embodiment 2, which will be described later, in that the plasma processing can be performed more appropriately.
- the processing chamber 2 also includes a temperature sensor (not shown) that detects the temperature of the stage 3, and the detection result of the temperature sensor is output to the control unit. Then, the control unit performs feedback control on the temperature of the stage 3 using the input detection result of the temperature sensor, thereby controlling the stage 3 to a predetermined set temperature during the plasma processing. do.
- a temperature sensor not shown
- the processing chamber 2 is provided with a processing gas supply unit (not shown) for introducing into the processing chamber 2 a processing gas corresponding to the predetermined plasma processing and containing the gas for film formation of the film. ), the plasma processing is performed in the atmosphere of the processing gas.
- Process gases are, for example, argon, hydrogen, nitrogen, silane, or oxygen.
- An antenna 4 for generating an inductively coupled plasma inside the processing chamber 2 is provided above the stage 3 inside the processing chamber 2 . That is, the plasma processing apparatus 1 of the present disclosure causes a high-frequency induction electric field to be generated in the vicinity of the antenna 4 by causing a high-frequency current to flow through the antenna 4, thereby generating inductively coupled plasma.
- the antenna 4 is, for example, arranged linearly on the substrate to be processed H1. Both ends of the antenna 4 are airtightly drawn out of the processing chamber 2 .
- An impedance adjuster 5 and an impedance adjuster 7 are connected to one end and the other end of the antenna 4, respectively.
- the impedance adjuster 5 has a matching circuit, and one end of the antenna 4 is connected to the power supply 6 via the impedance adjuster 5 . Also, the impedance adjustment unit 7 includes a variable capacitor. The other end of the antenna 4 is grounded via the impedance adjuster 7 .
- the power supply 6 supplies high-frequency power of, for example, 13.56 MHz to one end of the antenna 4 via the impedance adjustment section 5 .
- the controller changes the capacity of the variable capacitor of the impedance adjuster 7 so that high-frequency power is efficiently supplied to the antenna 4 inside the processing chamber 2 .
- an internal electrode 8 is provided on the opposite side of the substrate H1 (stage 3) to be processed with respect to the antenna 4. As shown in FIG. The internal electrode 8 is attached inside the processing chamber 2 via an insulating spacer 9 on the back side of the antenna 4 . That is, the antenna 4 is arranged between the internal electrode 8 and the stage 3 inside the processing chamber 2 .
- the internal electrode 8 is configured using, for example, a carbon plate or a metal plate.
- the internal electrode 8 is a control electrode that controls the charged particles contained in the plasma inside the processing chamber 2 . That is, the internal electrode 8 includes a power source (not shown) connected to the internal electrode 8, and by controlling the power source, the electrode potential control is performed so that a predetermined potential is applied to the internal electrode 8. section 10 is connected.
- the electrode potential control section 10 controls the potential of the internal electrode 8 to a predetermined potential by variably adjusting the voltage applied from the electrode power source to the internal electrode 8 according to the instruction from the control section.
- the carbon plates have a high strength and are less likely to bend or the like in spite of their lower density than metal plates. Therefore, even when the size of the internal electrode 8 is increased, in-plane non-uniformity of plasma due to deflection or the like can be prevented from occurring.
- the metal plate it is preferable to use a metal material with low density and high electrical conductivity. Specifically, it is preferable to use aluminum or an aluminum alloy.
- the internal electrodes 8 when the internal electrodes 8 are configured using metal plates of such a metal material, the internal electrodes 8 can be configured to be more excellent in mechanical impact than the internal electrodes 8 using carbon plates. The impact resistance of the plasma processing apparatus 1 can be enhanced. As a result, for example, when vibrations due to opening and closing of valves (not shown) are transmitted to the plasma processing apparatus 1, it is preferable to configure the internal electrodes 8 using the metal plates described above.
- the internal electrode 8 is composed of, for example, a punching metal-shaped grid electrode having a plurality of circular openings 8a.
- the internal electrode 8 selectively imparts kinetic energy to the charged particles according to the polarity of the charged particles and reduces the amount of charged particles reaching the substrate H1 to be processed (details will be described later).
- a mesh-like grid electrode may be used as the internal electrode 8 .
- FIG. 3 is a diagram for explaining the function of the internal electrodes 8. As shown in FIG. In addition, in the following description, the operation of the internal electrodes 8 will be mainly described. Also, in FIG. 3, illustration of the substrate to be processed H1, the antenna 4, and the power source 6 connected thereto is omitted.
- the antenna 4 (FIG. 1) operates and plasma is generated inside the processing chamber 2
- the charged particles k contained in the plasma reach the internal electrode 8 unlike the neutral particles n. moves according to the applied voltage. That is, inside the processing chamber 2, the stage 3 is grounded as shown in FIG. Exercise accordingly. That is, the charged particles k are selectively given kinetic energy from the internal electrode 8 or reduced in the amount reaching the substrate H1 to be processed, depending on the polarity of the charged particles k.
- the positive ions p have increased kinetic energy in the direction toward the substrate to be processed H1.
- the reaction of the positive ions p on the surface of the substrate H1 to be processed can be promoted, and a high-quality film can be formed on the surface.
- electrons or negative ions e have increased kinetic energy in the direction toward the internal electrode 8, as shown in FIG. As a result, the amount of electrons or negative ions e reaching the substrate to be processed H1 can be reduced. As a result, when the electrons or negative ions e degrade the film quality of the film formed on the surface of the substrate H1 to be processed by the plasma processing, the deterioration of the film quality can be suppressed.
- the plasma processing apparatus 1 of Embodiment 1 configured as described above includes a processing chamber 2 .
- the plasma processing apparatus 1 of Embodiment 1 includes a stage 3 in which a substrate to be processed H1 (object to be processed) is placed inside a processing chamber 2, and a stage 3 for generating inductively coupled plasma inside the processing chamber 2. and an antenna 4 of Further, the plasma processing apparatus 1 of Embodiment 1 includes an internal electrode 8 inside the processing chamber 2 to which a predetermined potential is applied.
- the internal electrode 8 can detect the charged particles contained in the plasma inside the processing chamber 2, unlike the conventional example.
- the behavior of k can be appropriately controlled.
- the antenna 4 is provided inside the processing chamber 2, plasma can be efficiently generated.
- the internal electrode 8 is provided inside the processing chamber 2, it is possible to directly control the movement and arrival amount of the charged particles of the plasma with respect to the stage 3. .
- a large potential gradient can be formed between the internal electrode 8 and the substrate H1 to be processed.
- kinetic energy can be selectively applied to the charged particles k contained in the plasma according to the polarity of the charged particles k. . Therefore, in the plasma processing apparatus 1 of Embodiment 1, it is possible to increase or decrease the amount of charged particles k reaching the substrate H1 to be processed. Therefore, in the first embodiment, unlike the conventional example, the operation of the charged particles k can be appropriately controlled, and the plasma processing apparatus 1 capable of performing high-quality plasma processing can be configured.
- the antenna 4 is a linear antenna and can be arranged between the internal electrode 8 and the stage 3 .
- the positive ions p and electrons or negative ions e of the charged particles k of the plasma generated by the antenna 4 are transferred to the substrate H1 to be processed or It can be appropriately moved to the internal electrode 8 side.
- the internal electrode 8 that serves as a shield is not installed between the antenna 4 and the substrate H1 to be processed on the stage 3 . Therefore, in the plasma processing apparatus 1 of Embodiment 1, it is possible to increase the amount of ions, radicals, etc. used for plasma processing reaching the substrate H1 to be processed. Therefore, in the plasma processing apparatus 1 of Embodiment 1, the film formation rate or the etching rate can be increased, and the cost can be easily reduced while shortening the tact time.
- the internal electrode 8 is arranged on the back side of the antenna 4 when viewed from the stage 3 .
- the internal electrode 8 is exposed to a wide range of plasma including not only the plasma generated between the antenna 4 and the stage 3 but also the plasma generated on the internal electrode 8 side of the antenna 4. 8 enables the electric field applied between the stage 3 and the stage 3 to act. Therefore, in the plasma processing apparatus 1 of Embodiment 1, it is possible to efficiently control the motion of the charged particles of plasma with respect to the stage 3 . As a result, in the plasma processing apparatus 1 of Embodiment 1, highly accurate plasma processing can be easily performed on the substrate H1 to be processed.
- a linear antenna 4 is used as the antenna 4 .
- the plurality of antennas 4 are arranged inside the processing chamber 2 so as to correspond to the large-sized substrate H1 to be processed. be able to
- a chemical vapor deposition method using plasma is performed on the substrate H1 to be processed as plasma processing. Accordingly, in the plasma processing apparatus 1 of the first embodiment, high-quality film formation can be performed on the substrate H1 to be processed.
- FIG. 4 is a diagram illustrating the configuration of a plasma processing apparatus according to Embodiment 2 of the present disclosure.
- members having the same functions as the members explained in the first embodiment are denoted by the same reference numerals, and the explanation thereof will not be repeated.
- the main difference between the second embodiment and the first embodiment is that a plurality of internal electrodes 8 whose potentials can be independently controlled are provided inside the processing chamber 2 . Another point is that the potential of the stage 3 is variably controlled.
- a plurality, for example, two internal electrodes 8 and 18 are provided inside the processing chamber 2 as shown in FIG.
- the internal electrode 18 is provided on the substrate to be processed H ⁇ b>1 (stage 3 ) side with respect to the antenna 4 so that the antenna 4 is arranged between the internal electrodes 8 and 18 .
- the internal electrode 18 is attached inside the processing chamber 2 via an insulating spacer 19 .
- the internal electrode 18 is configured in, for example, a punching metal shape, and as shown in FIG. 2, is made of a carbon plate or metal plate having a plurality of openings (not shown).
- the internal electrode 18 is connected to an electrode potential control section 20 that includes an electrode power supply (not shown) connected to the internal electrode 18 and controls the potential of the internal electrode 18 by controlling the electrode power supply. .
- the electrode potential control section 20 controls the potential of the internal electrode 18 to a predetermined potential by variably adjusting the applied voltage applied from the electrode power source to the internal electrode 18 according to the instruction from the control section. Further, the electrode potential control section 20 performs control independently of the electrode potential control section 10, and the internal electrodes 8 and 18 can be controlled to have different potentials. .
- the plasma processing apparatus 1 of Embodiment 2 can variably control the potential of the stage 3 .
- the stage 3 is provided with a stage potential control section 30 that includes a power supply (not shown) connected to the stage 3 and controls the potential of the stage 3 by controlling the power supply. .
- the stage potential control section 30 performs control independently of the electrode potential control sections 10 and 20 .
- the stage potential control unit 30 and the electrode potential control units 10 and 20 control the potentials of the stage 3, the internal electrode 8, and the internal electrode 18 to predetermined potentials, respectively, so that the charged particles can operate more appropriately. It is configured so that it can be controlled to
- the plasma processing apparatus 1 of the second embodiment when the potentials of the internal electrode 8, the internal electrode 18, and the stage 3 are set to a first potential, a second potential, and a third potential, respectively, the plasma processing apparatus 1 of the second embodiment , for example, first potential>second potential>third potential. As a result, the plasma processing apparatus 1 of the second embodiment can more effectively control the positive ions p and electrons or negative ions e shown in FIG.
- the potential of the stage 3 (third potential) is the lowest, the positive ions p are attracted by the potential of the stage 3, and the kinetic energy in the direction toward the substrate H1 to be processed is increased. . As a result, the reaction of the positive ions p on the surface of the substrate H1 to be processed can be further promoted, and a higher quality film can be formed on the surface.
- the potential (first potential) of the internal electrode 8 is the highest, the electrons or negative ions e are attracted by the potential of the internal electrode 8 and have more kinetic energy in the direction toward the internal electrode 8. be enlarged. As a result, the amount of electrons or negative ions e reaching the substrate H1 to be processed can be further reduced. As a result, when the electrons or negative ions e degrade the film quality of the coating formed on the surface of the substrate H1 to be processed by plasma processing, the deterioration of the film quality can be further suppressed.
- the plasma processing apparatus 1 of the second embodiment has the same effects as those of the first embodiment.
- the plasma processing apparatus 1 of Embodiment 2 further includes a stage potential control section 30 that controls the potential of the stage 3 .
- the stage potential control section 30 controls the potential of the stage 3, so that the motion of the charged particles k can be controlled more appropriately.
- the internal electrode 18 has the opening 18a. Gases and film-forming precursors can pass through smoothly. As a result, in the plasma processing apparatus 1 of Embodiment 1, even when the internal electrode 18 is provided between the antenna 4 and the stage 3, it is possible to suppress a decrease in processing efficiency in plasma processing.
- the film formation precursor refers to ions after the molecules and/or atoms generated by the decomposition of the processing gas introduced into the processing chamber 2 are ionized and/or excited. or radical.
- Electrode potential controllers 10 and 20 are connected to the plurality of internal electrodes 8 and 18, respectively, and the electrode potential controllers 10 and 20 independently control the potentials of the internal electrodes 8 and 18, respectively. It is possible.
- the electrode potential controllers 10 and 20 control the potentials of the internal electrodes 8 and 18, respectively, so that the proper operation of the charged particles k can be reliably controlled. can. That is, in the plasma processing apparatus 1 of Embodiment 2, the potential gradient inside the processing chamber 2 can be set more appropriately than in Embodiment 1, and the movement of the charged particles k can be more highly controlled. be able to
- a configuration in which the internal electrodes 8 are omitted may be used.
- a plurality of internal electrodes whose potentials can be controlled independently of each other may be provided between the antenna 4 and the stage 3 .
- a plasma processing apparatus including a processing chamber, a stage on which an object to be processed is installed inside the processing chamber; An antenna for generating an inductively coupled plasma inside the processing chamber and an internal electrode to which a predetermined potential is applied are provided.
- the plasma processing apparatus since the plasma processing apparatus includes an antenna for generating inductively coupled plasma inside the processing chamber, plasma can be efficiently generated. Furthermore, since the plasma processing apparatus is equipped with an internal electrode to which a predetermined potential is applied inside the processing chamber, it is possible to directly control the movement and amount of arrival of the charged particles of the plasma to the stage, resulting in high quality processing. It is possible to provide a plasma processing apparatus capable of performing plasma processing of
- the antenna may be arranged between the internal electrode and the stage.
- the internal electrodes are arranged on the back side of the antenna when viewed from the stage.
- the internal electrode prevents the plasma around the antenna, that is, not only between the antenna and the stage, but also plasma generated on the other side of the antenna when viewed from the stage. It becomes possible to apply an electric field applied between them. Therefore, it is possible to efficiently control the movement of the charged particles of the plasma with respect to the stage and the amount of arrival. As a result, highly accurate plasma processing can be easily performed on the object to be processed.
- the antenna may be a linear antenna.
- the antenna can be arranged inside the processing chamber so as to correspond to a large object to be processed.
- the plasma processing apparatus may further include a stage potential control section that controls the potential of the stage.
- the charged particles can be controlled more appropriately.
- a plurality of the internal electrodes are provided, and further comprising a plurality of electrode potential control units respectively connected to the plurality of internal electrodes, wherein the plurality of electrode potential control units include the The potentials of the plurality of internal electrodes may be controllable independently of each other.
- the internal electrode may be made of a carbon plate or a metal plate having a plurality of openings.
- charged particles generated inside the processing chamber and processing gas introduced into the processing chamber can smoothly pass through the opening, and the internal electrode is provided between the antenna and the stage. Even in such a case, it is possible to suppress a decrease in processing efficiency in plasma processing.
- film formation may be performed on the object to be processed placed on the stage by a chemical vapor deposition method using the plasma.
- a high-quality film can be formed on the object to be processed.
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Abstract
Description
以下、本開示の実施形態1について、図1から図2を用いて詳細に説明する。図1は、本開示の実施形態1に係るプラズマ処理装置1の構成を説明する図である。図2は、図1に示した内部電極8の具体的な構成例を説明する図である。
図1に示すように、本実施形態1のプラズマ処理装置1は、被処理物としての被処理基板H1が設置されるステージとしてのステージ3を備えている。プラズマ処理装置1は処理室2を備え、処理室2の内部において、ステージ3上に載置された被処理基板H1に対して所定のプラズマ処理を行う。プラズマ処理装置1は、プラズマ処理装置1の外部との間で被処理基板H1を搬入出するためのロードロック室(図示せず)を備えている。
処理室2は、接地された真空容器を用いて構成されており、当該真空容器の内部が所定の真空度に保たれた状態で、上記制御部の制御によって、所定のプラズマ処理が被処理基板H1に施されるようになっている。尚、本実施形態1のプラズマ処理装置1では、ステージ3も接地されている。尚、この説明以外に、後述の実施形態2に示すように、ステージ3の電位も制御することがプラズマ処理をより適切に実施できる点で好ましい。
処理室2の内部には、誘導結合性のプラズマを処理室2の内部に発生させるためのアンテナ4がステージ3の上方に設けられている。つまり、本開示のプラズマ処理装置1は、アンテナ4に高周波電流を流してアンテナ4の近傍に高周波誘導電界を発生させ、誘導結合性のプラズマを生成させる。アンテナ4は、例えば、被処理基板H1上で直線状に設けられている。アンテナ4の両端部は、処理室2の外部に気密に引き出されている。また、アンテナ4の一方の端部及び他方の端部には、インピーダンス調整部5及びインピーダンス調整部7がそれぞれ接続されている。
処理室2の内部には、内部電極8がアンテナ4に対して被処理基板H1(ステージ3)の反対側に設けられている。内部電極8は、アンテナ4の背面側で、絶縁スペーサー9を介して処理室2の内部に取り付けられている。つまり、処理室2の内部で、アンテナ4は内部電極8とステージ3との間に配置されている。
図3も用いて、本実施形態1のプラズマ処理装置1の動作について具体的に説明する。図3は、上記内部電極8の機能を説明する図である。なお、以下の説明では、内部電極8の動作について主に説明する。また、図3では、被処理基板H1、アンテナ4及びこれに接続された電源6などの図示は省略する。
本開示の実施形態2について、図4を用いて具体的に説明する。図4は、本開示の実施形態2に係るプラズマ処理装置の構成を説明する図である。なお、説明の便宜上、上記実施形態1にて説明した部材と同じ機能を有する部材については、同じ符号を付記し、その説明を繰り返さない。
上記の課題を解決するために、本開示の一側面に係るプラズマ処理装置は、処理室を備えたプラズマ処理装置であって、前記処理室の内部に、被処理物が設置されるステージと、前記処理室の内部に誘導結合性のプラズマを発生させるためのアンテナと、所定の電位が印加される内部電極と、を備えている。
2 処理室
3 ステージ
4 アンテナ
8 内部電極
8a 開口
10、20 電極電位制御部
30 ステージ電位制御部
H1 被処理基板(被処理物)
k 荷電粒子
p プラスイオン
e 電子あるいはマイナスイオン
Claims (7)
- 処理室を備えたプラズマ処理装置であって、
前記処理室の内部に、
被処理物が設置されるステージと、
前記処理室の内部に誘導結合性のプラズマを発生させるためのアンテナと、
所定の電位が印加される内部電極と、を備えている、プラズマ処理装置。 - 前記アンテナは、前記内部電極と前記ステージとの間に配置されている、請求項1に記載のプラズマ処理装置。
- 前記アンテナは、線状のアンテナである、請求項1または2に記載のプラズマ処理装置。
- 前記ステージの電位を制御するステージ電位制御部をさらに備えている、請求項1から3のいずれか1項に記載のプラズマ処理装置。
- 前記内部電極は複数設けられており、
前記複数の内部電極にそれぞれ接続された複数の電極電位制御部をさらに備え、
前記複数の電極電位制御部は、前記複数の内部電極の電位を互いに独立して制御可能である、請求項1から4のいずれか1項に記載のプラズマ処理装置。 - 前記内部電極は、複数の開口を有するカーボン板または金属板からなる、請求項1から5のいずれか1項に記載のプラズマ処理装置。
- 前記ステージに設置された前記被処理物への、前記プラズマを用いた化学気相堆積法による成膜を行う、請求項1から6のいずれか1項に記載のプラズマ処理装置。
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JPH05217907A (ja) * | 1992-02-04 | 1993-08-27 | Nissin Electric Co Ltd | 3極プラズマcvd装置 |
JP2012038682A (ja) * | 2010-08-11 | 2012-02-23 | Tokyo Electron Ltd | プラズマ処理装置及びプラズマ制御方法 |
JP2021098876A (ja) * | 2019-12-23 | 2021-07-01 | 日新電機株式会社 | プラズマ処理装置 |
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TW309692B (en) * | 1996-02-02 | 1997-07-01 | Applied Materials Inc | Parallel plate electrode plasma reactor having an inductive antenna coupling power through a parallel plate electrode |
US7416677B2 (en) * | 2006-08-11 | 2008-08-26 | Tokyo Electron Limited | Exhaust assembly for plasma processing system and method |
US20120186746A1 (en) * | 2009-09-29 | 2012-07-26 | Ulvac, Inc. | Plasma etching apparatus |
US10475626B2 (en) * | 2015-03-17 | 2019-11-12 | Applied Materials, Inc. | Ion-ion plasma atomic layer etch process and reactor |
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JPH05217907A (ja) * | 1992-02-04 | 1993-08-27 | Nissin Electric Co Ltd | 3極プラズマcvd装置 |
JP2012038682A (ja) * | 2010-08-11 | 2012-02-23 | Tokyo Electron Ltd | プラズマ処理装置及びプラズマ制御方法 |
JP2021098876A (ja) * | 2019-12-23 | 2021-07-01 | 日新電機株式会社 | プラズマ処理装置 |
JP2021150568A (ja) * | 2020-03-23 | 2021-09-27 | 株式会社Screenホールディングス | 基板処理装置および基板処理方法 |
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