WO2022163484A1 - 温度制御方法及び基板処理装置 - Google Patents
温度制御方法及び基板処理装置 Download PDFInfo
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- WO2022163484A1 WO2022163484A1 PCT/JP2022/001940 JP2022001940W WO2022163484A1 WO 2022163484 A1 WO2022163484 A1 WO 2022163484A1 JP 2022001940 W JP2022001940 W JP 2022001940W WO 2022163484 A1 WO2022163484 A1 WO 2022163484A1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L22/00—Testing or measuring during manufacture or treatment; Reliability measurements, i.e. testing of parts without further processing to modify the parts as such; Structural arrangements therefor
- H01L22/20—Sequence of activities consisting of a plurality of measurements, corrections, marking or sorting steps
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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
- H01L21/67098—Apparatus for thermal treatment
- H01L21/67109—Apparatus for thermal treatment mainly by convection
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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
- H01J37/32458—Vessel
- H01J37/32522—Temperature
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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
- H01L21/67—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
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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
- H01L21/67242—Apparatus for monitoring, sorting or marking
- H01L21/67248—Temperature monitoring
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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
- H01J2237/245—Detection characterised by the variable being measured
- H01J2237/24571—Measurements of non-electric or non-magnetic variables
- H01J2237/24585—Other variables, e.g. energy, mass, velocity, time, temperature
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L22/00—Testing or measuring during manufacture or treatment; Reliability measurements, i.e. testing of parts without further processing to modify the parts as such; Structural arrangements therefor
- H01L22/10—Measuring as part of the manufacturing process
- H01L22/12—Measuring as part of the manufacturing process for structural parameters, e.g. thickness, line width, refractive index, temperature, warp, bond strength, defects, optical inspection, electrical measurement of structural dimensions, metallurgic measurement of diffusions
Definitions
- the present disclosure relates to a temperature control method and a substrate processing apparatus.
- a substrate processing apparatus may perform multiple processes on a substrate placed in a processing container. For example, in Japanese Unexamined Patent Application Publication No. 2004-100000, a process of generating plasma of a first process gas and a process of generating plasma of a second process gas are alternately performed on a substrate within a processing container.
- the present disclosure provides a technique for correcting changes in substrate temperature for each process when multiple processes are performed on the substrate.
- a mounting surface for mounting a substrate is formed, a flow path is formed inside for flowing a temperature control medium whose temperature is adjusted, and a heat transfer gas is discharged onto the mounting surface.
- the temperature when performing a plurality of processes n (n is a process identifier and is a natural number greater than 1) in which heat input is generated in the substrate mounted on the mounting surface of the stage on which the discharge ports are formed.
- the temperature of the temperature control medium is set to the temperature TB, and the pressure of the heat transfer gas supplied to the discharge port is reduced below the pressure Pn for each process n . and the temperature TW'n ,min of the substrate in the process n when the pressure of the heat transfer gas supplied to the ejection port is increased above the pressure Pn.
- the temperature of the temperature control medium is adjusted to a temperature TB′′ that satisfies the following formula (1), and the heat transfer gas is supplied to the discharge port so that the temperature of the substrate reaches the temperature TWn for each process n . adjust the pressure of TB+max ( TWn -TW'n ,max ) ⁇ TB" ⁇ TB + min (TW n - TW' n, min ) (1)
- FIG. 1 is a schematic cross-sectional view showing an example of a substrate processing apparatus according to an embodiment.
- FIG. 2 is a diagram for explaining changes in heat transfer characteristics according to the embodiment.
- FIG. 3 is a flow chart showing an example of the flow of the temperature control method according to the embodiment.
- FIG. 4 is a diagram schematically showing an example of the configuration of the mounting table of the substrate processing apparatus according to the embodiment;
- FIG. 5 is a diagram showing an example of reduction in substrate thickness by etching according to the embodiment.
- FIG. 6 is a diagram showing another example of substrate protection according to the embodiment.
- FIG. 7 is a diagram for explaining the substrate temperature obtained by the temperature control method according to the embodiment.
- FIG. 1 is a schematic cross-sectional view showing an example of a substrate processing apparatus according to an embodiment.
- FIG. 2 is a diagram for explaining changes in heat transfer characteristics according to the embodiment.
- FIG. 3 is a flow chart showing an example of the flow of the temperature control method according to the embodiment.
- FIG. 8 is a diagram showing an example of the relationship between the pressure of the heat transfer gas and the temperature of the substrate according to the embodiment.
- FIG. 9 is a diagram showing an example of changes in the relationship between the pressure of the heat transfer gas and the temperature of the substrate depending on the amount of heat input from the plasma to the substrate according to the embodiment.
- FIG. 10 is a diagram illustrating an example of acquisition of substrate temperature from relational data according to the embodiment.
- FIG. 11 is a diagram explaining adjustment of the temperature of the temperature control medium in the temperature control method according to the embodiment.
- FIG. 12 is a diagram illustrating adjustment of the pressure of the heat transfer gas in the temperature control method according to the embodiment.
- the substrate processing apparatus performs substrate processing repeatedly, the parts wear out and the temperature of the substrate gradually changes over time.
- the mounting surface of the mounting table on which the substrate is mounted is worn, the heat transfer characteristics change, and the temperature of the substrate changes over time.
- Such variations in substrate temperature may affect the results of each process. Therefore, it is conceivable to correct the temperature of a temperature control medium such as a chiller that flows on the mounting table. cannot compensate for changes in temperature.
- FIG. 1 is a schematic cross-sectional view showing an example of a substrate processing apparatus 1 according to an embodiment.
- the substrate processing apparatus 1 includes a chamber 10 , a process gas supply section 20 , an RF (Radio Frequency) power supply section 30 and an exhaust system 40 .
- the substrate processing apparatus 1 also includes a mounting table 11 and an upper electrode showerhead 12 .
- the chamber 10 has a cylindrical space inside.
- a mounting table 11 is provided inside the chamber 10 .
- the mounting table 11 is formed in a columnar shape and is arranged in the central lower region within the chamber 10 .
- An upper electrode showerhead 12 is positioned above the mounting table 11 and may function as part of the ceiling of the chamber 10 .
- the mounting table 11 has a mounting surface 11a on which a substrate W such as a semiconductor wafer is mounted is formed in the center of the upper surface.
- the mounting table 11 is configured to support the substrate W in the plasma processing space 10s where plasma processing is performed.
- mounting table 11 includes lower electrode 111 , electrostatic chuck 112 and edge ring 113 .
- the electrostatic chuck 112 is disposed on the lower electrode 111 and configured to support the substrate W on the top surface of the electrostatic chuck 112 .
- the edge ring 113 is arranged to surround the substrate W on the top surface of the peripheral portion of the lower electrode 111 .
- the lower electrode 111 is made of a conductive metal such as aluminum.
- the lower electrode 111 functions as a base that supports the electrostatic chuck 112 and edge ring 113 .
- the mounting table 11 may include a temperature control module configured to control at least one of the electrostatic chuck 112 and the substrate W to a target temperature.
- the temperature control module may include heaters, channels, or combinations thereof.
- the lower electrode 111 has a channel 111a formed therein for flowing the temperature control medium.
- the channel 111a is formed on the entire surface of the mounting surface 11a corresponding to the mounting surface 11a on which the substrate W is mounted.
- a temperature control medium such as a refrigerant or a heat medium flows through the flow path 111a.
- the flow path 111 a is connected to the temperature control medium supply section 14 via the pipe 13 .
- the temperature control medium supply unit 14 can control the temperature of the temperature control medium to be supplied.
- the substrate processing apparatus 1 is configured to be able to control the temperature of the mounting table 11 by circulating temperature-controlled temperature control medium (for example, cooling water) from the temperature control medium supply unit 14 through the flow path 111a.
- temperature-controlled temperature control medium for example, cooling water
- the substrate processing apparatus 1 is configured to be able to supply a heat transfer gas to the back side of the substrate W.
- the mounting table 11 has a mounting surface 11a formed with a discharge port 11b for discharging the heat transfer gas.
- the discharge port 11b is connected to a gas supply pipe 15 passing through the mounting table 11.
- the gas supply pipe 15 is connected to the heat transfer gas supply section 16 .
- the heat transfer gas supply unit 16 supplies a heat transfer gas (backside gas) such as helium gas.
- the heat transfer gas supply unit 16 is provided with a flow rate controller so that the amount of heat transfer gas supplied can be controlled. With these configurations, the temperature of the substrate W attracted and held by the electrostatic chuck 112 on the upper surface of the mounting table 11 is controlled.
- the substrate processing apparatus 1 can control the temperature of the substrate W by controlling the temperature of the temperature control medium flowing through the flow path 111a and the flow rate of the heat transfer gas supplied to the back side of the substrate W.
- the upper electrode showerhead 12 is configured to supply one or more process gases from the process gas supply 20 to the plasma processing space 10s.
- the upper electrode showerhead 12 has a gas inlet 12a, a gas diffusion chamber 12b, and multiple gas outlets 12c.
- Gas inlet 12a is in fluid communication with process gas supply 20 and gas diffusion chamber 12b.
- a plurality of gas outlets 12c are in fluid communication with the gas diffusion chamber 12b and the plasma processing space 10s.
- the upper electrode showerhead 12 is configured to supply one or more process gases from a gas inlet 12a to the plasma processing space 10s via a gas diffusion chamber 12b and a plurality of gas outlets 12c.
- the process gas supply 20 may include one or more gas sources 21 and one or more flow controllers 22.
- process gas supply 20 is configured to supply one or more process gases from respective gas sources 21 through respective flow controllers 22 to gas inlets 12a.
- Each flow controller 22 may include, for example, a mass flow controller or a pressure controlled flow controller.
- process gas supply 20 may include one or more flow modulation devices that modulate or pulse the flow of one or more process gases.
- the RF power supply 30 supplies RF power, such as one or more RF signals, to one or more of the lower electrode 111, the upper electrode showerhead 12, or both the lower electrode 111 and the upper electrode showerhead 12. electrodes.
- RF power supply 30 may function as at least part of a plasma generator configured to generate a plasma from one or more process gases in a plasma processing chamber.
- RF power supply 30 includes two RF generators 31a, 31b and two matching circuits 32a, 32b.
- RF power supply 30 is configured to supply a first RF signal from first RF generator 31a to bottom electrode 111 through first matching circuit 32a.
- the first RF signal may have a frequency within the range of 27MHz-100MHz.
- the RF power supply 30 is configured to supply a second RF signal from the second RF generator 31b to the lower electrode 111 via the second matching circuit 32b.
- the second RF signal may have a frequency within the range of 400 kHz to 13.56 MHz.
- a DC (Direct Current) pulse generator may be used instead of the second RF generator 31b.
- the RF power supply 30 provides a first RF signal from an RF generator to the bottom electrode 111, a second RF signal from another RF generator to the bottom electrode 111, and a third RF signal may be configured to be supplied to the lower electrode 111 from another RF generator.
- a DC voltage may be applied to the top electrode showerhead 12 .
- the amplitude of one or more RF signals may be pulsed or modulated.
- Amplitude modulation may involve pulsing the RF signal amplitude between an on state and an off state, or between two or more different on states.
- the chamber 10 is formed with an exhaust port 10e for exhausting the inside.
- the mounting table 11 is disposed in the center, and the exhaust port 10e is located around the mounting table 11 and lower than the mounting surface 11a of the mounting table 11 on which the substrate W is mounted. is provided.
- the exhaust port 10 e is provided at the bottom of the chamber 10 around the mounting table 11 .
- the exhaust system 40 may be connected to an exhaust port 10 e provided at the bottom of the chamber 10 .
- Exhaust system 40 may include a pressure valve and a vacuum pump. Vacuum pumps may include turbomolecular pumps, roughing pumps, or combinations thereof.
- the operation of the substrate processing apparatus 1 configured as described above is centrally controlled by the control unit 60 .
- a user interface 61 and a storage unit 62 are connected to the control unit 60 .
- the user interface 61 includes an operation unit such as a keyboard for inputting commands for the process manager to manage the substrate processing apparatus 1, and a display unit such as a display for visualizing and displaying the operating status of the substrate processing apparatus 1. It is configured.
- the user interface 61 accepts various operations. For example, the user interface 61 receives a predetermined operation instructing the start of plasma processing.
- the storage unit 62 is a storage device that stores various data.
- the storage unit 62 is a storage device such as a hard disk, SSD (Solid State Drive), or optical disk.
- the storage unit 62 may be a rewritable semiconductor memory such as RAM (Random Access Memory), flash memory, NVSRAM (Non Volatile Static Random Access Memory).
- the storage unit 62 stores an OS (Operating System) and various programs executed by the control unit 60 .
- the storage unit 62 stores various programs including a program for executing temperature control method processing, which will be described later.
- the storage unit 62 stores various data used by the programs executed by the control unit 60 .
- the storage unit 62 stores the temperature of the temperature control medium, the gas type and gas flow rate used in the plasma processing, the supplied RF power, the flow rate of the heat transfer gas, and the temperature of the substrate W for each process performed on the substrate W. Processing conditions such as temperature are stored as recipes.
- the storage unit 62 can also store other data in addition to the data exemplified above.
- the control unit 60 is a device that controls the substrate processing apparatus 1 .
- electronic circuits such as CPU (Central Processing Unit) and MPU (Micro Processing Unit), and integrated circuits such as ASIC (Application Specific Integrated Circuit) and FPGA (Field Programmable Gate Array) can be employed.
- the control unit 60 has an internal memory for storing programs defining various processing procedures and control data, and executes various processing using these.
- the control unit 60 functions as various processing units by running various programs.
- the control unit 60 has a first acquisition unit 60a, a correction determination unit 60b, a second acquisition unit 60c, and an adjustment unit 60d.
- the control unit 60 controls the substrate processing apparatus 1 and performs a plurality of processes on the substrate W placed on the mounting table 11 inside the chamber 10 according to the recipe stored in the storage unit 62 .
- the substrate processing apparatus 1 when the substrate processing apparatus 1 repeatedly performs substrate processing, the parts wear out and the temperature of the substrate W gradually changes over time.
- the mounting surface 11a of the mounting table 11 wears due to friction with the substrate W or plasma, and the heat transfer characteristics change, and the temperature of the substrate W changes with time.
- the processing results of each process may be affected.
- FIG. 2 is a diagram explaining changes in heat transfer characteristics according to the embodiment.
- the mounting table 11 is schematically shown on the left side, and a circuit showing the heat flow of the mounting table 11 is schematically shown on the right side.
- the mounting table 11 has an electrostatic chuck 112 arranged on a lower electrode 111 .
- the lower electrode 111 has a channel 111a formed therein.
- the mounting table 11 mounts the substrate W on a mounting surface 11 a that is the upper surface of the electrostatic chuck 112 .
- An uneven pattern such as dots is formed on the placement surface 11a.
- a heat transfer gas such as helium gas is accumulated in the concave portions of the pattern of the mounting surface 11a.
- the heat input from the plasma 120 to the substrate W is indicated as heat ⁇ Q .
- the heat of the substrate W is conducted to the mounting table 11 via the uneven pattern of the mounting surface 11 a of the mounting table 11 .
- the thermal resistance of the convex portion of the mounting surface 11a is indicated by R Dot
- the thermal resistance of the heat transfer gas of the concave portion of the mounting surface 11a is indicated by R gas .
- the temperature of the lower electrode 111 is controlled to be constant by a temperature control medium flowing through the flow path 111a.
- the heat transferred to the lower electrode 111 is discharged outside by the temperature control medium.
- the lower electrode 111 is indicated as GND b because the temperature of the lower electrode 111 is controlled to be constant by the temperature control medium.
- the heat input ⁇ Q from the plasma 120 to the substrate W changes with time due to deterioration and wear of the chamber 10.
- FIG. the thermal resistance R Dot changes with time due to wear of the pattern of the mounting surface 11a.
- the heat input ⁇ Q and the thermal resistance R Dot change over time and cannot be corrected directly.
- the substrate processing apparatus 1 it is conceivable to correct the temperature of the substrate W by changing the temperature of the temperature control medium flowing through the flow path 111a.
- the substrate processing apparatus 1 can change the GND b and offset the temperature of the substrate W by changing the temperature of the temperature control medium flowing through the channel 111a.
- the change characteristics of the temperature of the substrate W differ for each process.
- the heat input ⁇ Q from the plasma 120 to the substrate W differs for each process.
- the temperature of the substrate W cannot be corrected for each process only by changing the temperature of the temperature control medium.
- the convex portion of the mounting surface 11a mainly conducts heat to the substrate W, and the surface shape of the mounting surface 11a is transferred to the substrate W.
- the temperature of the substrate W changes between the convex portions and the concave portions of the pattern on the mounting surface 11a, and the amount of etching of the substrate W differs between the convex portions and the concave portions of the pattern. surface shape is transferred to the substrate W.
- the supply of the heat transfer gas is excessively increased, the heat transfer gas leaks from the periphery of the substrate W, causing an abnormality such as electric discharge.
- FIG. 3 is a flow chart showing an example of the flow of the temperature control method according to the embodiment.
- the first acquisition unit 60a acquires the temperature of the temperature control medium before the temperature change when performing a plurality of processes, the pressure of the heat transfer gas supplied from the heat transfer gas supply unit 16, and the temperature of the substrate W for each process. acquire (step S1). For example, the first acquisition unit 60a supplies the heat transfer gas from the heat transfer gas supply unit 16 for each process when executing a plurality of processes according to the recipe stored in the storage unit 62 at the reference timing before the temperature change. The pressure of the heat transfer gas and the temperature of the substrate W are obtained. The pressure of the heat transfer gas may be obtained by measuring the flow rate of the gas supplied from the heat transfer gas supply unit 16, or may be obtained by reading the flow rate of the heat transfer gas stored in the recipe. The temperature of the substrate W may also be obtained by measuring the actual temperature of the substrate W, or may be obtained by reading out the temperature of the substrate W stored in the recipe.
- FIG. 4 is a diagram schematically showing an example of the configuration of the mounting table 11 of the substrate processing apparatus 1 according to the embodiment.
- a measurement unit 17 is provided below the mounting table 11 .
- the measurement unit 17 measures the temperature of the substrate W by light interference.
- the mounting table 11 is formed with a through hole 11c penetrating to the mounting surface 11a corresponding to the position of the measuring unit 17 .
- a member that transmits light is provided in the through hole 11c.
- the measurement unit 17 incorporates a light source that emits light and optical elements such as mirrors, lenses, and splitters, and is capable of emitting interfering light. For example, the measuring unit 17 splits the intermediate portion of the optical path until the light generated by the light source is emitted to the outside into two optical paths using a half mirror or the like, and the length of one optical path is set to the length of the other optical path. Interference is caused by changing the optical path difference to irradiate light of various interference waves with different optical path differences.
- the measurement unit 17 may be provided with a plurality of light sources, control the light from each light source with an optical element, and irradiate light of various interference waves with different optical path differences.
- the measurement unit 17 detects signal intensities of light of various interference waves reflected by the substrate W.
- the substrate W When the substrate W is heated by the action of plasma or the like, it expands and its refractive index changes. Therefore, the position of the interference waveform shifts before and after the temperature change, and the peak-to-peak width of the interference waveform changes.
- the measurement unit 17 detects the temperature by measuring the peak-to-peak width of the interference waveform. Any light can be used as the light source of the measurement unit 17 as long as interference can be measured.
- the substrate W is a semiconductor wafer, it is preferable that the reflected light from at least the distance between the front surface and the rear surface of the semiconductor wafer (usually about 800 to 1500 ⁇ m) does not cause interference.
- Low coherence light refers to light with a short coherence length.
- the center wavelength of the low coherence light is preferably 0.3 to 20 ⁇ m, more preferably 0.5 to 5 ⁇ m.
- the coherence length is preferably 0.1 to 100 ⁇ m, more preferably 3 ⁇ m or less.
- FIG. 5 is a diagram showing an example of reduction in the thickness of the substrate W by etching according to the embodiment.
- a decrease in the thickness of the substrate W causes a deviation in the measured temperature. Therefore, as the substrate W, a substrate W for temperature measurement such as a tummy wafer may be used. Further, the substrate W may be protected so that the temperature measurement position where the light from the measurement unit 17 is incident is not worn out.
- the substrate W shown in FIG. 5 is provided with a protective chip 130 at a temperature measurement position where the light from the measurement unit 17 is incident.
- the chip 130 may be provided with a reflective film 131 that reflects light on the substrate W side. Even if the substrate W is subjected to a plasma etching or sputtering process and the substrate W is worn from the upper surface side, the temperature measurement position can be prevented from being worn.
- FIG. 6 is a diagram showing another example of protection of the substrate W according to the embodiment.
- the substrate W shown in FIG. 6 has a reflective film 141 and a protective film 140 formed on its upper surface.
- the protective film 140 may be any film as long as it can protect the upper surface of the substrate W from plasma etching and sputtering.
- the protective film 140 only needs to protect the top surface of the substrate W during temperature measurement and may be consumed. When the protective film 140 is worn out, the substrate W is replaced with a new one and the temperature is measured.
- the substrate W used for temperature measurement may be a processing substrate on which a plasma process such as etching or sputtering is actually performed, or may be a dummy substrate. Further, it is known that the plasma state when plasma is generated may differ depending on the surface state of the substrate, and in such cases, the plasma heat input to the substrate may also change. Therefore, when a protective film 140 is formed on the top surface of the substrate W as shown in FIG. is desirable. For example, when a patterned resist is used, the material of the protective film 140 is preferably a resist or a blanket film of an organic material.
- the material of the protective film 140 is desirably a blanket film of a silicon oxide film or a silicon nitride film.
- the configuration for measuring the temperature of the substrate W is not limited to the above, and any configuration may be used as long as the temperature of the substrate W can be measured.
- the temperature of the substrate W may be measured by providing a temperature sensor such as a thermocouple on the mounting surface 11 a of the mounting table 11 .
- the temperature may be measured from infrared light emitted from the substrate W by providing an infrared sensor in the upper electrode showerhead 12 .
- the correction determination unit 60b determines whether the temperature of the substrate W in each process needs to be corrected (step S2). For example, the correction determination unit 60b periodically measures the temperature of the substrate W for each process using the measurement unit 17 at a predetermined timing. The timing for measuring the temperature is, for example, each time a certain number of wafers W are processed.
- the correction determination unit 60b compares the measured temperature of the substrate W with the temperature of the substrate W acquired in step S1 for each process, and obtains the temperature change of the substrate W for each process.
- the correction determination unit 60b determines whether the temperature change of the substrate W exceeds a predetermined threshold for each process, and corrects the temperature of the substrate W when the temperature change of the substrate W exceeds the threshold in any process. is necessary.
- the correction determination unit 60b does not measure the temperature of the substrate W, and measures the temperature of the substrate W at a predetermined temperature that causes the temperature change. It may be determined that the temperature of the substrate W needs to be corrected each time a number of substrates are processed.
- step S2 If temperature correction is not necessary (step S2: No), the correction determination unit 60b repeats the determination of step S2.
- the second acquisition unit 60c increases the temperature of the substrate W when the pressure of the heat transfer gas is decreased and the pressure of the heat transfer gas is increased for each process n.
- the temperature of the substrate W in the case where the wafer W is held is obtained (step S3).
- the adjustment unit 60d adjusts the temperature of the temperature control medium supplied from the temperature control medium supply unit 14 and the pressure of the heat transfer gas supplied from the heat transfer gas supply unit 16 for each process to adjust the temperature of the substrate W for each process. Correct the change (step S4).
- FIG. 7 is a diagram for explaining the temperature of the substrate W obtained by the temperature control method according to the embodiment.
- 7A to 7D schematically show changes in the temperature of the substrate W for each process by the temperature control method according to the embodiment.
- Processes 1 to 3 have different recipes, and the heat input ⁇ Q from the plasma 120 to the substrate W is different.
- step S1 described above the first acquisition unit 60a performs a plurality of processes n (n is a process identifier and is a natural number greater than 1) that generate heat input to the substrate W before the temperature changes.
- the reference temperature TB of the temperature control medium, the pressure Pn of the heat transfer gas supplied from the heat transfer gas supply unit 16 for each process n , and the temperature TWn of the substrate W are obtained.
- FIG. 7A shows the temperatures TW 1 -TW 3 of the substrate W in the processes 1-3.
- step S2 the correction determination unit 60b determines whether the temperature change of the substrate W exceeds a predetermined threshold value for each process n, and the temperature change of the substrate W exceeds the threshold value in any process n. In this case, it is determined that the temperature of the substrate W needs to be corrected.
- FIG. 7B shows the case where the temperature of the substrate W in the processes 1 to 3 reaches temperatures TW' 1 to TW' 3 due to aging.
- the correction determination unit 60b determines that the temperature of the substrate W needs to be corrected when the temperature change of the substrate W exceeds the threshold value in the processes 1 to 3.
- FIG. 7B shows the case where the temperature of the substrate W in the processes 1 to 3 reaches temperatures TW' 1 to TW' 3 due to aging.
- the correction determination unit 60b determines that the temperature of the substrate W needs to be corrected when the temperature change of the substrate W exceeds the threshold value in the processes 1 to 3.
- the second obtaining unit 60c obtains the temperature of the substrate W when the pressure of the heat transfer gas is decreased and the temperature of the substrate W when the pressure of the heat transfer gas is increased for each process n. and get.
- the second acquisition unit 60c sets the temperature of the temperature control medium to the temperature TB, and for each process n, the temperature of the heat transfer gas supply unit 16 is set within a range in which the surface shape of the mounting surface 11a is not transferred to the substrate W.
- the temperature TW'n ,max of the substrate W in the process n when the pressure of the heat transfer gas to be supplied is reduced below the pressure Pn, and the heat transfer gas supply part within a range in which an abnormality due to leakage of the heat transfer gas does not occur The temperature TW'n ,min of the substrate W in the process n when the pressure of the heat transfer gas supplied from 16 is increased above the pressure Pn is obtained.
- the substrate processing apparatus 1 when the pressure of the heat transfer gas supplied from the heat transfer gas supply unit 16 is reduced, heat transfer between the substrate W and the recessed portion of the mounting surface 11a of the mounting table 11 by the heat transfer gas is reduced. Therefore, the temperature of the substrate W rises.
- the pressure of the heat transfer gas supplied from the heat transfer gas supply unit 16 increases, heat transfer between the substrate W and the substrate W in the concave portion of the mounting surface 11a of the mounting table 11 due to the heat transfer gas is reduced. Since the temperature increases, the temperature of the substrate W decreases.
- FIG. 8 is a diagram showing an example of the relationship between the pressure of the heat transfer gas and the temperature of the substrate W according to the embodiment.
- a graph showing the relationship between the pressure of the heat transfer gas and the temperature of the substrate W is shown in FIG.
- the heat transfer gas supply unit 16 can supply the heat transfer gas within a pressure control range of, for example, 5 to 50 Torr.
- the temperature of the substrate W decreases as the pressure of the heat transfer gas supplied from the heat transfer gas supply unit 16 increases.
- the convex portion of the mounting surface 11a mainly conducts heat to the substrate W, and the surface shape of the mounting surface 11a is transferred to the substrate W.
- FIG. 9 is a diagram showing an example of changes in the relationship between the pressure of the heat transfer gas and the temperature of the substrate W depending on the amount of heat input from the plasma 120 to the substrate W according to the embodiment.
- the curve showing the relationship between the pressure of the heat transfer gas and the temperature of the substrate W shifts upward as a whole.
- the second acquisition unit 60c sequentially decreases the pressure of the heat transfer gas supplied from the heat transfer gas supply unit 16 within a range in which the surface shape of the mounting surface 11a is not transferred to the substrate W.
- the temperature TW′ n,max of the substrate W is measured by the measurement unit 17 and obtained for each process n.
- FIG. 7C shows that the pressure of the heat transfer gas supplied from the heat transfer gas supply unit 16 is set within a range in which the surface shape of the mounting surface 11a is not transferred to the substrate W for each of the processes 1 to 3.
- the temperatures TW' 1,max to TW' 3,max of the substrate W are shown when they are reduced below P 1 to P 3 .
- the second acquisition unit 60c acquires W′ 1,max to TW′ 3,max by measuring with the measurement unit 17 .
- the pressure of the heat transfer gas may be lowered within a range where transfer to the substrate W does not occur, and the pressure does not necessarily need to be lowered to the boundary where transfer does not occur. Further, the value of the pressure of the heat transfer gas to be lowered may be determined in advance within a range in which transfer to the substrate W does not occur by experiment or the like.
- the second acquisition unit 60c sequentially increases the pressure of the heat transfer gas supplied from the heat transfer gas supply unit 16 within a range in which an abnormality due to leakage of the heat transfer gas does not occur for each process n, thereby obtaining a substrate for each process n.
- the temperature TW′ n,min of W is measured by the measurement unit 17 and acquired.
- FIG. 7(D) shows that the pressure of the heat transfer gas supplied from the heat transfer gas supply unit 16 is higher than the pressures P 1 to P 3 within the range in which an abnormality due to heat transfer gas leakage does not occur for each of the processes 1 to 3.
- the increased temperatures TW' 1,min to TW' 3,min of the substrate W are shown.
- the second acquisition unit 60c acquires W′ 1,min to TW′ 3,min by measuring with the measurement unit 17 .
- the pressure of the heat transfer gas may be increased within a range in which an abnormality due to leakage of the heat transfer gas does not occur, and the pressure does not necessarily need to be increased to the boundary where an abnormality does not occur. Also, the value of the pressure of the heat transfer gas to be increased may be determined in advance within a range where no abnormality occurs by experiment or the like.
- the second acquisition unit 60c actually decreases and increases the pressure of the heat transfer gas supplied from the heat transfer gas supply unit 16, and measures the temperatures TW' n,max and TW' n,min of the substrate W by the measurement unit 17.
- the second acquisition unit 60c may acquire the temperatures TW' n,max and TW' n,min of the substrate W from the relationship between the pressure of the heat transfer gas and the temperature of the substrate W.
- the storage unit 62 stores relational data indicating the relation between the pressure of the heat transfer gas and the temperature of the substrate W as shown in FIG. 8 for each process.
- the relational data may be a relational expression in which the relation between the pressure of the heat transfer gas and the temperature of the substrate W is modeled as a mathematical formula, or data storing the temperature of the substrate W at each pressure of the heat transfer gas.
- the second acquisition unit 60c reads the relational data corresponding to the process from the storage unit 62 for each process, and calculates the temperature of the substrate W when the pressure of the heat transfer gas is actually decreased and increased from the relational data corresponding to the process.
- TW'n ,max and TW'n ,min may be obtained.
- FIG. 10 is a diagram illustrating an example of obtaining the temperatures TW' n,max and TW' n,min of the substrate W from the relational data according to the embodiment.
- the second acquisition unit 60c acquires the temperature TW'n ,max of the substrate W at the pressure b and the temperature TW'n ,min of the substrate W at the pressure a.
- step S4 described above the adjustment unit 60d adjusts the temperature of the temperature control medium and the pressure of the heat transfer gas supplied from the heat transfer gas supply unit 16 to correct changes in the temperature of the substrate W for each process.
- the adjustment unit 60d adjusts the temperature of the temperature control medium to a temperature TB′′ that satisfies the following formula (1).
- TWn -TW'n ,max TB+max ( TWn -TW'n ,max ) ⁇ TB" ⁇ TB + min (TW n - TW' n, min )
- max (TW n - TW' n,max ) is a function that obtains the maximum value among the values obtained from TW n - TW' n,max for each process n.
- min(TW n - TW' n,min ) is a function for obtaining the minimum value among the values obtained for TW n - TW' n,min of each process n.
- FIG. 11 is a diagram explaining adjustment of the temperature of the temperature control medium in the temperature control method according to the embodiment.
- FIG. 11A shows the temperatures TW 1 to TW 3 of the substrate W in the processes 1 to 3 obtained in step S1.
- FIG. 11(B) shows the temperatures TW′ 1 to TW′ 3 of the substrate W in processes 1 to 3 that have changed over time and the temperatures of the substrate W in processes 1 to 3 shown in FIGS. 7(B) to (D).
- a range from temperatures TW' 1,max to TW' 3,max to temperatures TW' 1,min to TW' 3,min is shown.
- the temperature of the substrate W that can be raised by reducing the amount of heat transfer gas within a range in which the surface shape of the mounting surface 11a is not transferred to the substrate W is TW′ 1,max to TW. ' 3,max .
- Processes 1 to 3 increase the temperature of the temperature control medium by ⁇ TB, thereby increasing the temperatures TW′ 1,max to TW′ 3,max of the substrate W by ⁇ TB, respectively.
- the temperatures TW'' 1 to TW'' 3 are the temperatures obtained by increasing the temperatures TW' 1,max to TW' 3,max of the substrate W by ⁇ TB, respectively.
- the processes 1 to 3 can be transferred onto the substrate W.
- the temperature of the substrate W can be corrected by adjusting the pressure of the heat transfer gas within a range in which it does not occur.
- ⁇ TB must satisfy the following formula (2).
- the temperature of the substrate W that can be lowered by increasing the amount of the heat transfer gas within a range in which an abnormality such as discharge does not occur is temperatures TW' 1,min to TW' 3,min .
- the temperatures TW' 1,min to TW' 3,min of the substrate W rise by ⁇ TB by increasing the temperature of the temperature control medium by ⁇ TB.
- the temperatures TW'' 1 to TW'' 3 are obtained by increasing the temperatures TW' 1,min to TW' 3,min of the substrate W by ⁇ TB, respectively.
- TW′′ 1 to TW′′ 3 of the substrates W in the processes 1 to 3 which have increased the temperature of the temperature control medium by ⁇ TB, respectively become TW 1 to TW 3 or less, an abnormality such as discharge occurs in the processes 1 to 3.
- the temperature of the substrate W can be corrected by adjusting the pressure of the heat transfer gas within a range in which it does not. In this case, ⁇ TB must satisfy the following formula (3).
- Expressions (2) and (3) are the correction range of the temperature of the temperature control medium.
- the temperature TB′′ of the temperature control medium after correction is the temperature TB+ ⁇ TB of the temperature control medium before correction. Therefore, the above formula (1) is obtained from the formulas (2) and (3).
- the heat transfer gas is used for each process without causing an abnormality such as the transfer of the surface shape of the mounting surface 11a to the substrate W or discharge.
- the temperature of the substrate W can be corrected by adjusting the pressure.
- the range in which the pressure of the heat transfer gas can be adjusted is narrow. It is preferable to adjust the temperature of the temperature control medium to a temperature near the center of the range of the temperature TB′′ shown in 1).
- the adjustment unit 60d adjusts the temperature of the temperature control medium to the center temperature of the range of the temperature TB′′ shown in Equation (1).
- FIG. 12 is a diagram illustrating adjustment of the pressure of the heat transfer gas in the temperature control method according to the embodiment.
- FIG. 12A shows the temperatures TW 1 to TW 3 of the substrate W in the processes 1 to 3 obtained in step S1.
- FIG. 12B shows a state in which the temperature of the temperature control medium is raised by ⁇ TB and adjusted to the temperature TB′′.
- the temperatures of W are temperatures TW' 1 to TW' 3 .
- the adjustment unit 60d further adjusts the pressure of the heat transfer gas supplied from the heat transfer gas supply unit 16 so that the temperature of the substrate W reaches the temperature TWn for each process n .
- the adjustment unit 60d measures the temperature of the substrate W using the measurement unit 17 for each process n , and adjusts the pressure of the heat transfer gas supplied from the heat transfer gas supply unit 16 so that the temperature of the substrate W reaches the temperature TWn. adjust.
- FIG. 12C shows a state in which the pressure of the heat transfer gas is adjusted for each process n.
- the temperatures TW′′ 1 to TW′′ 3 of the substrate W in the processes 1 to 3 after adjusting the pressure of the heat transfer gas are the temperatures TW 1 to TW 3 .
- the adjustment unit 60d measures the temperature of the substrate W using the measurement unit 17 and adjusts the pressure of the heat transfer gas supplied from the heat transfer gas supply unit 16.
- the adjustment unit 60d may adjust the pressure of the heat transfer gas supplied from the heat transfer gas supply unit 16 using relational data indicating the relationship between the pressure of the heat transfer gas and the temperature of the substrate W.
- the adjustment unit 60d reads the relational data corresponding to the process from the storage unit 62 for each process, and supplies the temperature of the substrate W from the relational data corresponding to the process from the heat transfer gas supply unit 16 so that the temperature of the substrate W becomes the temperature TWn .
- the pressure of the heat transfer gas may be adjusted.
- the mounting surface 11a on which the substrate W is mounted is formed, the channel 111a through which the temperature-adjusted temperature control medium flows is formed inside, and the mounting surface 11a is formed.
- Temperature change when performing a plurality of processes n in which heat input is generated in the substrate W mounted on the mounting surface 11a of the stage (mounting table 11) having the discharge port 11b for discharging the heat transfer gas formed in the stage 11a The temperature TB of the previous temperature control medium, the pressure Pn of the heat transfer gas supplied to the discharge port 11b for each process n , and the temperature TWn of the substrate W are obtained.
- the temperature of the temperature control medium is set to the temperature TB, and the pressure of the heat transfer gas supplied to the discharge port 11b is reduced below the pressure Pn for each process n .
- the temperature of the temperature control medium is adjusted to the temperature TB′′ that satisfies the above formula (1), and the temperature of the substrate W is adjusted to the temperature TWn for each process n .
- the temperature control method according to the embodiment corrects changes in the temperature of the substrate W for each process n when a plurality of processes n are performed on the substrate W. can.
- the temperature TW' n,max and the temperature TW' n,min are obtained by setting the temperature of the temperature control medium to the temperature TB after the temperature change, and setting each process n.
- the temperature control method can adjust the pressure of the heat transfer gas within a range that does not cause an abnormality due to the transfer of the surface shape of the mounting surface 11a to the substrate W and the leakage of the heat transfer gas. , the change in the temperature of the substrate W for each process n can be corrected.
- the acquisition of the temperature TWn and the acquisition of the temperature TW'n ,max and the temperature TW'n ,min are performed by measuring the temperature of the substrate W by the measurement unit 17 that measures the temperature of the substrate W. Measure and get. Accordingly, the temperature control method according to the embodiment can actually measure the temperature of the substrate W to obtain the temperature TWn , the temperature TW'n ,max , and the temperature TW'n ,min .
- the temperature TB and the temperature TWn of the temperature control medium are obtained from a recipe that stores the temperature of the temperature control medium and the temperature of the substrate W for each process n as processing conditions.
- the temperature TW'n ,max and the temperature TW'n ,min are obtained using relationship data indicating the relationship between the pressure of the heat transfer gas and the temperature of the substrate W for each process n. TW′n ,max of the substrate W in the process n when the pressure of the heat transfer gas supplied to the ejection port 11b is reduced below the pressure Pn, and the pressure of the heat transfer gas supplied to the ejection port 11b.
- the temperature control method can acquire the temperature TB, the temperature TW n , the temperature TW′ n,max , and the temperature TW′ n,min of the temperature control medium without actually measuring the temperature.
- the temperature control method it is determined whether the temperature change of the substrate W exceeds a predetermined threshold for each process n.
- the temperature TW'n ,max and the temperature TW'n ,min are acquired when the temperature change of the substrate W exceeds the threshold value in any process.
- the temperature control method can correct the temperature change of the substrate W for each process n when the temperature change of the substrate W exceeds the threshold value in any process.
- the substrate W is a semiconductor wafer, but the substrate W is not limited to this.
- the substrate W may be any.
- the case where plasma etching is performed on the substrate W as a plurality of processes has been described as an example, but the present invention is not limited to this.
- the plurality of processes may be any process as long as the substrate W receives heat input.
- the multiple processes may be heat treatments such as ashing.
- the substrate processing apparatus 1 has been described as an example of a plasma processing apparatus that performs plasma processing, but it is not limited to this.
- the substrate processing apparatus 1 may be any apparatus as long as it performs substrate processing in which heat input to the substrate W is generated.
- the substrate processing apparatus 1 may be a film forming apparatus or the like.
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Abstract
Description
TB+max(TWn-TW’n,max) ≦ TB”
≦ TB+min(TWn-TW’n,min) ・・・(1)
[装置構成]
本開示の基板処理装置の一例について説明する。最初に、実施形態に係る基板処理装置1について説明する。基板処理装置1は、基板Wに対して基板処理を実施する。実施形態では、基板処理装置1をプラズマ処理装置とし、基板処理としてプラズマ処理を基板Wに対して行う場合を例に説明する。図1は、実施形態に係る基板処理装置1の一例を示す概略断面図である。一実施形態において、基板処理装置1は、チャンバ10、プロセスガス供給部20、RF(Radio Frequency)電力供給部30及び排気システム40を含む。また、基板処理装置1は、載置台11及び上部電極シャワーヘッド12を含む。
≦ TB+min(TWn-TW’n,min) ・・・(1)
ここで、
max(TWn-TW’n,max)は、プロセスnごとにTWn-TW’n,maxを求めた値のうちの最大値を求める関数である。
min(TWn-TW’n,min)は、各プロセスnのTWn-TW’n,minを求めた値のうちの最小値を求める関数である。
10 チャンバ
11 載置台
11a 載置面
11b 吐出口
14 温調媒体供給部
17 計測部
60 制御部
60a 第1取得部
60b 補正判定部
60c 第2取得部
60d 調整部
61 ユーザインターフェース
62 記憶部
111 下部電極
111a 流路
112 静電チャック
113 エッジリング
Claims (6)
- 基板を載置する載置面が形成され、温度を調整した温調媒体が流される流路が内部に形成され、前記載置面に伝熱ガスを吐出する吐出口が形成されたステージの前記載置面に載置された前記基板に入熱が発生する複数のプロセスn(nは、プロセスの識別子であり、1よりも大きい自然数)を実施する際の温度変化前の前記温調媒体の温度TBと、前記プロセスnごとの前記吐出口へ供給する伝熱ガスの圧力Pn及び前記基板の温度TWnとを取得し、
温度変化後に、前記温調媒体の温度を温度TBとして、前記プロセスnごとに、前記吐出口へ供給する前記伝熱ガスの圧力を前記圧力Pnよりも減少させた場合の前記プロセスnでの前記基板の温度TW’n,maxと、前記吐出口へ供給する前記伝熱ガスの圧力を前記圧力Pnよりも増加させた場合の前記プロセスnでの前記基板の温度TW’n,minとを取得し、
前記温調媒体の温度を、以下の式(1)を満たす温度TB”に調整し、
前記プロセスnごとに、前記基板の温度が前記温度TWnとなるよう前記吐出口へ供給する伝熱ガスの圧力を調整する
温度制御方法。
TB+max(TWn-TW’n,max) ≦ TB”
≦ TB+min(TWn-TW’n,min) ・・・(1) - 前記温度TW’n,maxと前記温度TW’n,minの取得は、前記温度変化後に、前記温調媒体の温度を温度TBとして、前記プロセスnごとに、それぞれ前記載置面の表面形状の前記基板への転写が発生しない範囲で前記吐出口へ供給する前記伝熱ガスの圧力を前記圧力Pnよりも減少させた場合の前記プロセスnでの前記基板の温度TW’n,maxと、前記伝熱ガスの漏れによる異常が発生しない範囲で前記吐出口へ供給する前記伝熱ガスの圧力を前記圧力Pnよりも増加させた場合の前記プロセスnでの前記基板の温度TW’n,minとを取得する
請求項1に記載の温度制御方法。 - 前記温度TWnの取得及び前記温度TW’n,maxと前記温度TW’n,minの取得は、前記基板の温度を測定する計測部により前記基板の温度を計測して取得する
請求項1又は2に記載の温度制御方法。 - 前記温調媒体の温度TBと前記温度TWnの取得は、前記温調媒体の温度、前記プロセスnごとの前記基板の温度を処理条件として記憶したレシピから取得し、
前記温度TW’n,maxと前記温度TW’n,minの取得は、前記プロセスnごとに、前記伝熱ガスの圧力と前記基板の温度の関係を示した関係データを用いて、前記吐出口へ供給する前記伝熱ガスの圧力を前記圧力Pnよりも減少させた場合の前記プロセスnでの前記基板の温度TW’n,maxと、前記吐出口へ供給する前記伝熱ガスの圧力を前記圧力Pnよりも増加させた場合の前記プロセスnでの前記基板の温度TW’n,minとを取得する
請求項1又は2に記載の温度制御方法。 - プロセスnごとに、前記基板の温度変化が所定の閾値を超えているか判定し、
何れかのプロセスで前記基板の温度変化が閾値を超えている場合、前記温度TW’n,maxと前記温度TW’n,minを取得する
請求項1~4の何れか1つに記載の温度制御方法。 - 基板を載置する載置面が形成され、温調媒体を流すための流路が内部に形成され、前記載置面に伝熱ガスを吐出する吐出口が形成されたステージと、
前記温調媒体の温度を調整可能し、温度を調整した前記温調媒体を前記流路に供給する温調媒体供給部と、
前記吐出口から吐出させる前記伝熱ガスを供給するガス供給部と、
前記基板に入熱が発生する複数のプロセスn(nは、プロセスの識別子であり、1よりも大きい自然数)を実施する際の温度変化前の前記温調媒体の温度TBと、前記プロセスnごとの前記ガス供給部から供給する伝熱ガスの圧力Pn及び前記基板の温度TWnとを取得する第1取得部と、
温度変化後に、前記温調媒体の温度を温度TBとして、前記プロセスnごとに、前記ガス供給部から供給する前記伝熱ガスの圧力を前記圧力Pnよりも減少させた場合の前記プロセスnでの前記基板の温度TW’n,maxと、前記ガス供給部から供給する前記伝熱ガスの圧力を前記圧力Pnよりも増加させた場合の前記プロセスnでの前記基板の温度TW’n,minとを取得する第2取得部と、
前記温調媒体の温度を、以下の式(2)を満たす温度TB”に調整し、前記プロセスnごとに、前記基板の温度が前記温度TWnとなるよう前記ガス供給部から供給する伝熱ガスの圧力を調整する調整部と、
を有する基板処理装置。
TB+max(TWn-TW’n,max) ≦ TB”
≦ TB+min(TWn-TW’n,min) ・・・(2)
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JP2012199535A (ja) * | 2011-03-08 | 2012-10-18 | Tokyo Electron Ltd | 基板温度制御方法及びプラズマ処理装置 |
JP2012209477A (ja) * | 2011-03-30 | 2012-10-25 | Tokyo Electron Ltd | 温度制御方法及びプラズマ処理システム |
JP2016136554A (ja) * | 2015-01-23 | 2016-07-28 | 株式会社日立ハイテクノロジーズ | プラズマ処理装置 |
JP2019067846A (ja) * | 2017-09-29 | 2019-04-25 | 東京エレクトロン株式会社 | 温度制御方法 |
JP2019117861A (ja) * | 2017-12-27 | 2019-07-18 | 株式会社日立ハイテクノロジーズ | ウエハ処理方法およびウエハ処理装置 |
JP2019186334A (ja) * | 2018-04-06 | 2019-10-24 | 東京エレクトロン株式会社 | プラズマ処理装置及びプラズマ処理方法 |
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US7491343B2 (en) | 2006-09-14 | 2009-02-17 | Lam Research Corporation | Line end shortening reduction during etch |
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JP2012199535A (ja) * | 2011-03-08 | 2012-10-18 | Tokyo Electron Ltd | 基板温度制御方法及びプラズマ処理装置 |
JP2012209477A (ja) * | 2011-03-30 | 2012-10-25 | Tokyo Electron Ltd | 温度制御方法及びプラズマ処理システム |
JP2016136554A (ja) * | 2015-01-23 | 2016-07-28 | 株式会社日立ハイテクノロジーズ | プラズマ処理装置 |
JP2019067846A (ja) * | 2017-09-29 | 2019-04-25 | 東京エレクトロン株式会社 | 温度制御方法 |
JP2019117861A (ja) * | 2017-12-27 | 2019-07-18 | 株式会社日立ハイテクノロジーズ | ウエハ処理方法およびウエハ処理装置 |
JP2019186334A (ja) * | 2018-04-06 | 2019-10-24 | 東京エレクトロン株式会社 | プラズマ処理装置及びプラズマ処理方法 |
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TW202244658A (zh) | 2022-11-16 |
US20230378004A1 (en) | 2023-11-23 |
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