WO2012043053A1 - 基板処理システム - Google Patents
基板処理システム Download PDFInfo
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- WO2012043053A1 WO2012043053A1 PCT/JP2011/067411 JP2011067411W WO2012043053A1 WO 2012043053 A1 WO2012043053 A1 WO 2012043053A1 JP 2011067411 W JP2011067411 W JP 2011067411W WO 2012043053 A1 WO2012043053 A1 WO 2012043053A1
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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
- H01L21/027—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34
- H01L21/0271—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34 comprising organic layers
- H01L21/0273—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34 comprising organic layers characterised by the treatment of photoresist layers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C15/00—Enclosures for apparatus; Booths
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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
- C23C16/455—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 characterised by the method used for introducing gases into reaction chamber or for modifying gas flows in reaction chamber
- C23C16/45557—Pulsed pressure or control pressure
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/16—Coating processes; Apparatus therefor
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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
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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
- H01L21/67253—Process monitoring, e.g. flow or thickness monitoring
Definitions
- the present invention relates to a substrate processing system for performing predetermined processing on a substrate, and relates to a substrate processing system for processing a substrate in a state where a chamber is filled with an inert gas.
- various substrate processes that perform predetermined processing on a substrate, such as a coating device that coats a resist solution on a substrate, a substrate transport device, and a drying device that dries a coating film on the substrate.
- the system is used.
- these apparatuses are arranged in a simple sealed chamber, and a predetermined process is performed in this chamber.
- a coating apparatus is disposed in the chamber, and a supply port for supplying an inert gas into the chamber and an atmosphere in the chamber are exhausted into the chamber. And an exhaust port.
- the inert gas is supplied into the chamber from the supply port and exhausted from the exhaust port, thereby reducing the oxygen concentration in the chamber as much as possible, and discharging the resist solution onto the substrate to form the coating film. It is formed.
- the dimensions of the supply port and the exhaust port of the chamber are designed so that the exhaust amount from the exhaust port is smaller than the supply amount of the inert gas from the supply port, and when the inert gas is supplied, Oxygen in the chamber is gradually replaced with newly supplied inert gas (inert gasification).
- the chamber is kept at a slightly high pressure to prevent oxygen in the atmosphere from entering the chamber. Therefore, the oxygen concentration in the chamber is suppressed to a predetermined oxygen concentration or less, and the coating film formed on the substrate can be prevented from being oxidized.
- the above substrate processing system has a problem that the oxygen concentration in the chamber cannot be suppressed to a predetermined oxygen concentration. That is, the supply source of the inert gas is set for each factory and is commonly used in various apparatuses. Therefore, in the substrate processing system in which the flow rate is adjusted according to the dimensions of the supply port and the exhaust port, the supply flow rate of the inert gas supplied from the supply port when the supply pressure temporarily decreases due to the use state of the inert gas. The exhaust flow rate exhausted from the exhaust port is lower. As a result, there is a problem that oxygen in the atmosphere easily enters the chamber due to the pressure in the chamber being lower than atmospheric pressure, which may increase the oxygen concentration in the chamber.
- the present invention has been made in view of the above-described problems, and can maintain a stable pressure in the chamber even when the supply flow rate of the inert gas varies.
- An object of the present invention is to provide a substrate processing system capable of increasing the supply flow rate and reducing the time required for inert gasification.
- a substrate processing system of the present invention includes a stage on which a substrate is mounted, a substrate processing unit that performs a predetermined process on the substrate mounted on the stage, and the stage and the substrate processing unit.
- a chamber covered in a sealed state a gas supply unit that supplies an inert gas into the chamber, and a gas exhaust unit that exhausts the gas in the chamber, wherein the pressure inside the chamber is a pressure outside the chamber.
- the supply flow rate of the inert gas in the gas supply unit and the exhaust flow rate of the gas exhaust unit are adjusted based on the pressure in the chamber so that a higher set pressure value in the chamber is obtained.
- the inert gas supply flow rate of the gas supply unit and the exhaust flow rate of the gas exhaust unit are adjusted based on the pressure in the chamber, the pressure in the chamber is set to the chamber set pressure. Can be stably maintained. That is, even if the supply flow rate of the inert gas varies, the exhaust flow rate is adjusted according to the supply flow rate, so that the chamber is maintained at a constant chamber set pressure. Therefore, when the pressure inside the chamber becomes higher than that outside the chamber, oxygen can be prevented from entering the chamber from outside the chamber, and the oxygen concentration in the chamber can be prevented from rising. Further, even when the supply flow rate of the inert gas is increased, the exhaust flow rate can be increased according to the supply flow rate to maintain the chamber at the set pressure of the chamber. An inert gas can be supplied. Therefore, by supplying a large amount of an inert gas necessary for replacing oxygen in the chamber with an inert gas, it is possible to reduce the time required for the inert gasification in the initial operation.
- an upper limit pressure value and a lower limit pressure value are set as the chamber set pressure, and the gas supply unit is configured so that the pressure in the chamber is maintained between the upper limit pressure value and the lower limit pressure value.
- the supply flow rate of the inert gas and the exhaust flow rate of the gas exhaust unit may be adjusted.
- the inside of the chamber can be maintained at the chamber set pressure with a simpler configuration.
- An initial operation mode in which both the supply flow rate of the gas supply unit and the exhaust flow rate of the gas exhaust unit are increased to maintain the pressure in the chamber at a set pressure value; the supply flow rate of the gas supply unit and the gas exhaust unit A normal operation mode in which the pressure in the chamber is kept at the set pressure value by reducing both the exhaust flow rate of the chamber, and the initial operation mode is when the oxygen concentration in the chamber is lower than the set value. It is good also as a structure switched to normal operation mode.
- the gas exhaust part has an exhaust pipe connected to the chamber, and the exhaust pipe has a buffer part whose volume can be changed according to pressure fluctuation in the pipe.
- a configuration in which a sudden pressure fluctuation in the pipe is absorbed by changing the volume of the buffer portion may be adopted.
- the chamber set pressure can be maintained by expanding the volume of the buffer section.
- the pressure in the chamber can be stably maintained even when the supply flow rate of the inert gas varies, and during the initial operation, the supply flow rate of the inert gas is increased.
- the time required for active gasification can be shortened.
- FIG. 1 is a diagram schematically showing a substrate processing system according to an embodiment of the present invention.
- the substrate processing system 1 includes a substrate processing apparatus 10, a gas supply unit 20, and a gas exhaust unit 30, and supplies an inert gas from the gas supply unit 20 to the substrate processing apparatus 10.
- the substrate processing apparatus 10 By exhausting the gas of the substrate processing apparatus 10 from the gas exhaust unit 30, the substrate processing apparatus 10 performs a predetermined process on the substrate while maintaining the substrate in a specific environment.
- the substrate processing apparatus 10 has a substrate processing unit 40 on the base 11, and the substrate processing unit 40 is accommodated in the chamber 12.
- the substrate processing unit 40 is a coating apparatus, and a coating film such as a resist solution is formed on the substrate by the coating apparatus.
- the coating apparatus includes a stage 41 on which a substrate is placed and a coating unit 42 that coats a coating solution, and a coating film having a uniform thickness is formed on the substrate by discharging the coating solution from the coating unit 42. It is supposed to be formed.
- the coating unit 42 is fixedly provided at a substantially central position on the base 11 and has a base 43 having a slit nozzle 43a extending in one direction.
- the coating liquid supplied from the slit nozzle 43a is discharged from the slit nozzle 43a over the longitudinal direction.
- the stage 41 is provided so that it can move in one direction with respect to the coating unit 42, and the moving stage 41 crosses the slit nozzle 43a. Accordingly, a coating film having a uniform thickness is formed on the substrate by discharging the coating liquid from the slit nozzle 43a while the stage 41 moves in one direction while the substrate is placed on the stage 41. It has come to be.
- the substrate processing unit 40 (in this embodiment, a coating apparatus) is accommodated in the chamber 12.
- the chamber 12 has a shape in which a rectangular parallelepiped 12a having a side surface portion and a convex top portion 12b in which a central portion where the coating unit 42 is located protrudes upward are combined.
- the chamber 12 is formed by attaching a transparent acrylic plate to a metal frame so that the internal substrate processing unit 40 can be visually recognized from the outside.
- a seal member is provided between the joint portion of each frame and between the frame and the acrylic plate, so that the substrate processing unit 40 is sealed in the chamber 12. That is, the inert gas supplied from the gas supply unit 20 is stored in the chamber 12 so that external oxygen or the like can be prevented from entering the chamber 12.
- a connecting portion 13 with the gas supply unit 20 is provided on the convex top portion 12 b of the chamber 12, and an inert gas is supplied from the gas supply unit 20 through the connecting portion 13.
- a connecting portion 14 to the gas exhaust portion 30 is provided at a side portion of the chamber 12, and the gas in the chamber 12 is exhausted from the gas exhaust portion 30 through the connecting portion 14.
- a glove box 15 is provided on the side surface of the chamber 12.
- the glove box 15 is for maintaining the substrate processing unit 40 from the outside of the chamber 12, and is formed by attaching a rubber glove to the chamber 12.
- two through holes are formed in the side surface of the chamber 12, and rubber gloves are attached so as to close the through holes. That is, the fingertips of rubber gloves are attached so as to extend toward the inside of the chamber 12. Accordingly, during maintenance such as wiping of the slit nozzle 43a, an operator puts his hand in the rubber glove and performs a predetermined maintenance process on the substrate processing unit 40, whereby the gas environment (oxygen in the chamber 12) Maintenance work can be performed without changing the density.
- an oxygen concentration meter 16 and a pressure gauge 17 are attached to the chamber 12 so that the oxygen concentration and pressure in the chamber 12 can be measured.
- the oxygen concentration meter 16 and the pressure gauge 17 are each electrically connected to a control device 90 described later, and the respective measurement results are input to the control device 90.
- a gas supply unit 20 is provided on the convex top portion 12 b of the chamber 12, and an inert gas such as nitrogen is supplied from the gas supply unit 20 into the chamber 12.
- the gas supply unit 20 includes a supply pipe 21 connected to the connecting part 13 of the convex top portion 12 b and a regulator 22 provided on the supply pipe 21.
- the supply pipe 21 is connected to an inert gas cylinder such as nitrogen, and the flow rate of the inert gas supplied into the chamber 12 can be controlled by adjusting the regulator 22.
- the regulator 22 is an electropneumatic regulator 22, and the open / close state is controlled steplessly by an electrical signal from the control device 90. Therefore, the supply flow rate of the inert gas in the chamber 12 can be increased or decreased by the control device 90.
- the supply pipe 21 is provided with a flow meter 23.
- the flow meter 23 is electrically connected to the control device 90, and the measured exhaust flow rate can be input to the control device 90.
- the side surface portion of the chamber 12 is connected to the gas exhaust unit 30 via the connection unit 14 so that the gas in the chamber 12 can be discharged out of the chamber 12 through the gas exhaust unit 30.
- the gas exhaust unit 30 includes an exhaust pipe 31 connected in communication with the side surface of the chamber 12 and a blower 32 provided in the exhaust pipe 31.
- exhaust pipes 31 are connected to two places on the side surface, and these two exhaust pipes 31 are joined and connected to a predetermined exhaust gas treatment device (not shown).
- a blower 32 is provided at a confluence portion of the exhaust pipe 31, and the gas in the chamber 12 is exhausted through the exhaust pipe 31 by operating the blower 32.
- the rotational speed of the blower 32 is controlled by the control device 90, and the rotational speed of the blower 32 is steplessly controlled by an electric signal from the control device 90.
- the exhaust flow rate of the gas in the chamber 12 is adjusted by controlling the rotation speed of the blower 32.
- the pressure in the chamber 12 can be controlled by the gas supply unit 20 and the gas exhaust unit 30. That is, the pressure in the chamber 12 can be kept high by reducing the exhaust flow rate of the gas exhaust unit 30 as compared with the supply flow rate of the inert gas from the gas supply unit 20.
- the regulator 22 and the blower 32 are adjusted as appropriate so that a pressure slightly higher than the atmospheric pressure outside the chamber 12 can be maintained. Thereby, the inside of the chamber 12 is filled with an inert gas, and oxygen can be prevented from entering from the outside of the chamber 12.
- the exhaust pipe 31 is provided with a buffer section 33.
- the buffer unit 33 suppresses a rapid pressure increase in the chamber 12. Thereby, it is possible to prevent the chamber 12 from being damaged by high pressure.
- the buffer portion 33 is a bag-like member formed of an elastically deformable material such as rubber or resin. When the inside of the bag-like member reaches a predetermined pressure, the buffer portion 33 is elastically expanded. ing. That is, the chamber 12 is formed of a material that expands at a pressure that does not break due to an increase in pressure.
- the buffer unit 33 has an inlet / outlet, and an exhaust pipe 31 is connected to each of the inlet / outlet. Thereby, it can suppress that the pressure in the chamber 12 rises rapidly.
- the exhaust pipe 31 is provided with a flow meter 34.
- the flow meter 34 is electrically connected to the control device 90 so that the measured exhaust flow rate can be input to the control device 90.
- an air supply pipe 51 for supplying air is separately connected to the supply pipe 21 so that air can be supplied into the chamber 12.
- the air supply pipe 51 is connected to an air cylinder, and the air supply pipe 51 is provided with a regulator 52 electrically connected to the control device 90. The air can be supplied into the chamber 12 by controlling the opening / closing operation of the regulator 52.
- an open pipe 54 is connected to the chamber 12 so that the inert gas in the chamber 12 can be exhausted at once. That is, an open pipe 54 connected to a vacuum pump is connected to the chamber 12, and an open valve 55 whose opening / closing operation is controlled is provided in the control device 90.
- the release valve 55 is opened, the inside of the chamber 12 is sucked by the vacuum pump, and the gas in the chamber 12 is exhausted at once.
- the open pipe 54 and the air supply pipe 51 can prevent the inert gas from being filled outside the chamber 12 when a problem occurs in the substrate processing apparatus 10.
- the open valve 55 of the open pipe 54 is opened and the regulator 52 is also opened, the inside of the chamber 12 is exhausted and air is supplied from the air supply pipe 51. Thereby, since the inert gas in the chamber 12 is replaced with air at a stretch, it is possible to prevent the inert gas from being filled outside the chamber 12.
- FIG. 2 is a block diagram showing a control system of the control device 90 provided in the substrate processing apparatus 10.
- the substrate processing apparatus 10 is provided with a control device 90 that comprehensively controls driving of the various units described above.
- the control device 90 includes a control main body 91, a drive control unit 92, a pressure detection unit 93, an oxygen concentration detection unit 94, and a flow rate detection unit 95.
- the control main-body part 91 has the main control part 91a, the determination part 91b, the setting part 91c, and the memory
- the main control unit 91a drives and controls driving devices such as motors and regulators 22 and 52 of each unit and the substrate processing operation through the drive control unit 92 so as to execute a series of coating operations according to a program stored in advance.
- driving devices such as motors and regulators 22 and 52 of each unit and the substrate processing operation through the drive control unit 92 so as to execute a series of coating operations according to a program stored in advance.
- Various operations necessary for the above are performed. Specifically, in order to control the coating apparatus which is the substrate processing unit 40, the coating liquid is discharged from the coating unit 42 and the movement of the stage 41 is driven and controlled. Then, the open / close state of each regulator 22 and the rotational speed of the blower 32 are controlled, and the inside of the chamber 12 is set to a pressure slightly higher than the outside of the chamber 12 (chamber set pressure).
- the determination unit 91b determines whether the pressure, oxygen concentration, and blower rotation speed in the chamber 12 are predetermined set values. For example, it is determined whether or not the pressure in the chamber 12 is a set pressure (chamber set pressure). Specifically, an upper limit value and a lower limit value of the chamber set pressure are stored as threshold values in the storage unit 91d described later, and it is determined whether or not the pressure in the chamber 12 is within the range of these threshold values. Is done. If the upper limit value of the chamber set pressure is exceeded, the rotational speed of the blower 32 is increased through the drive control unit 92 to increase the exhaust flow rate of the gas in the chamber 12 so that the pressure in the chamber 12 is within the threshold value. Adjust to enter.
- the supply flow rate is reduced by adjusting the regulator 22 of the gas supply unit 20 to increase the pressure in the chamber 12. To be within the threshold.
- the rotational speed of the blower 32 is decreased through the drive control unit 92. If the rotational speed of the blower 32 does not fall within the threshold value, the supply flow rate is increased by adjusting the regulator 22 of the gas supply unit 20 so that the pressure in the chamber 12 falls within the threshold value. adjust. In this way, the pressure in the chamber 12 is adjusted to be the chamber set pressure.
- the determination unit 91b also determines the oxygen concentration in the chamber 12, and determines whether or not the inside of the chamber 12 has an oxygen concentration suitable for product manufacture. Specifically, it is determined whether or not the oxygen concentration in the chamber 12 has reached the oxygen concentration stored in the storage unit 91d.
- the setting unit 91c sets the chamber set pressure, the opening / closing degree of the regulator 22, and the rotation speed of the blower 32.
- the initial operation mode is a mode used in the initial operation of the apparatus, and is a mode whose main purpose is to quickly reduce the oxygen concentration in the chamber 12.
- the regulator 22 of the gas supply unit 20 is largely opened (throttle is reduced), and the rotation speed of the blower 32 is set. Enlarge. Thereby, the oxygen in the chamber 12 is replaced with the inert gas as soon as possible.
- the normal operation mode is a mode for operating the coating apparatus while suppressing the amount of inert gas used while maintaining the oxygen concentration in the chamber 12 below the set oxygen concentration.
- the regulator 22 of the gas supply unit 20 is set to a smaller open state (larger throttle) than in the initial operation mode, and the blower 32 rotates. Set the number smaller. Thereby, consumption of an inert gas can be suppressed, maintaining the pressure in the chamber 12 at a chamber setting pressure.
- the degree of opening and closing of the regulator 22 and the rotation speed of the blower 32 according to the initial operation mode and the normal operation mode can be set through the drive control unit 92. Switching between the initial operation mode and the normal operation mode is switched according to the oxygen concentration in the chamber 12. That is, when the inside of the chamber 12 is in the atmosphere, the opening / closing degree of the regulator 22 and the blower rotation speed are set to the initial operation mode, and the pressure in the chamber 12 is maintained at the chamber setting pressure. When the inside of the chamber 12 reaches the set oxygen concentration stored in the storage unit 91d, the pressure in the chamber 12 is set to the opening / closing degree and the blower rotation speed of the regulator 22 in the normal operation mode while maintaining the chamber set pressure.
- the inside of the chamber 12 can be replaced early with the inert gas in the initial operation mode, and the supply of unnecessary inert gas can be suppressed in the normal operation mode.
- an auto-tuning function is provided so that the chamber set pressure is adjusted to an optimum value.
- the threshold region of the chamber setting pressure becomes small. Set the upper and lower limits again.
- the threshold region for the chamber setting pressure is set to an upper limit value and a lower limit value that become smaller.
- the storage unit 91d stores various data and temporarily stores calculation results and the like. Specifically, the threshold data of the chamber set pressure, the threshold holding time, the set oxygen concentration, the regulator open / close rate, the blower rotation speed, and the like in the initial operation mode and the normal operation mode are stored. A plurality of sets of upper limit values and lower limit values are prepared for the threshold value data of the chamber set pressure, and an upper limit value P1 and a lower limit value P2 are set as the largest threshold regions, and an upper limit value P3 as an intermediate threshold region. The lower limit value P4 is set, and the upper limit value P5 and the lower limit value P6 are finally set as the smallest threshold region (see FIG. 3).
- the blower rotation speed is set as Ra in the initial operation mode and Rb in the normal operation mode, and Ra in the initial operation mode is set to a larger value than Rb in the normal operation mode.
- the degree of opening and closing of the regulator 22 is set so that the throttle amount in the initial operation mode is smaller than the throttle amount in the normal operation mode, and the supply flow rate in the initial operation mode is larger than the supply flow rate in the normal operation mode. It is like that.
- the drive control unit 92 controls the drive of each motor, drive device, and the like based on a control signal from the control main body unit 91. Specifically, the degree of opening and closing of each regulator 22, the number of rotations of the blower 32, and the like are controlled.
- the pressure detector 93 detects the pressure in the chamber 12. Specifically, the pressure in the chamber 12 is detected by a signal input from a pressure gauge 17 attached to the chamber 12. The detected pressure is stored in the storage unit 91 d of the control main body 91.
- the oxygen concentration detector 94 detects the oxygen concentration in the chamber 12. Specifically, the oxygen concentration in the chamber 12 is detected by a signal input from the oxygen concentration meter 16 attached to the chamber 12. The detected oxygen concentration is stored in the storage unit 91 d of the control main body 91.
- the flow rate detector 95 detects the gas flow rate in the supply pipe 21 and the exhaust pipe 31. Specifically, in the supply pipe 21 and the exhaust pipe 31, the signal input from the flow meter 23 attached to the supply pipe 21 and the signal input from the flow meter 34 attached to the exhaust pipe 31. The gas flow rate is detected. The detected gas flow rate is stored in the storage unit 91 d of the control main body 91.
- step S1 an initial operation is performed (initial operation mode). That is, since the chamber 12 is filled with the atmosphere, the initial operation is performed until the oxygen concentration in the chamber 12 becomes equal to or lower than the set oxygen concentration.
- the chamber set pressure is set to the combination having the largest threshold region, that is, the upper limit value P1 and the lower limit value P2.
- the regulator 22 is set to the opening / closing degree of the initial operation mode, and the blower rotation speed is set to Ra. Then, the pressure in the chamber 12 is converged to the chamber set pressure while maintaining a balance between the supply flow rate of the inert gas and the gas exhaust flow rate in the chamber 12 at a large flow rate.
- the inert gas supply flow rate is maintained slightly higher than the gas exhaust flow rate.
- the blower rotational speed is adjusted. That is, when the upper limit is exceeded, the blower rotational speed is slightly increased to decrease the pressure in the chamber 12. If the lower limit is exceeded, the blower rotational speed is slightly decreased to increase the pressure in the chamber 12. Thereby, the oxygen concentration in the chamber 12 can be rapidly reduced by supplying a large amount of inert gas into the chamber 12 while the pressure in the chamber 12 maintains the chamber set pressure.
- step S2 normal operation mode
- the chamber set pressure is set to the upper limit value P1 and the lower limit value P2, which are the combinations having the largest threshold value region, and the regulator 22 is set to the degree of opening and closing of the normal operation mode and the blower rotation speed is set to Rb.
- the opening / closing degree in the normal operation mode is larger than the opening / closing degree in the initial operation mode, so that the supply flow rate can be suppressed.
- the blower rotation speed Rb in the normal operation mode is smaller than the blower rotation speed Ra in the initial operation mode, the exhaust flow rate can be suppressed.
- the supply flow rate and the exhaust flow rate are kept at a small flow rate as compared with the initial operation mode, and the pressure in the chamber 12 is converged to the chamber set pressure. Thereby, the consumption amount of the inert gas is suppressed in the normal operation mode compared to the initial operation mode.
- the blower rotation speed is adjusted. That is, when the upper limit is exceeded, the blower rotational speed is slightly increased to decrease the pressure in the chamber 12. If the lower limit is exceeded, the blower rotational speed is slightly decreased to increase the pressure in the chamber 12. In this way, when the pressure in the chamber 12 is within the threshold value of the chamber set pressure for a predetermined time, the threshold value of the chamber set pressure is changed to a narrower threshold range. That is, the upper limit value is changed from P1 to P3, and the lower limit value is changed from P2 to P4.
- the pressure in the chamber 12 is adjusted so as to fall within the threshold region by increasing or decreasing the blower rotational speed in the same manner as before.
- the upper limit value P5 and the lower limit value P6 that are the narrowest threshold regions are finally set, and the chamber set pressure is maintained within this range.
- the chamber set pressure is adjusted to an optimum value (auto tuning function).
- step S4 it is determined whether or not to stop the apparatus. Specifically, when the processing on the substrate is finished and the substrate is taken out, or when the substrate processing apparatus 10 is forcibly stopped, the process proceeds to YES in step S4, and the operation of the substrate processing apparatus 10 is finished. . Further, in the case where the processing for the substrate is continued, in step S4, the process proceeds in the NO direction, and the operation of the substrate processing apparatus 10 is continued.
- step S5 it is determined whether or not the pressure in the chamber 12 is maintained at the chamber set pressure. That is, when the pressure in the chamber 12 is maintained at the chamber set pressure, the process proceeds to YES in step S5, and the normal operation mode is continuously executed. If it is out of the chamber set pressure range due to maintenance work or the like, the process proceeds in the NO direction in step S5, and the rotation speed of the blower 32 is increased. Specifically, there is a wiping operation of the base 43 as a maintenance operation of the present embodiment. Since the wiping operation is performed by wiping the cap 43 while putting the hand in the glove of the glove box 15, the pressure in the chamber 12 increases by the amount of the hand put in the glove and exceeds the upper limit value of the chamber setting pressure. It will be.
- the buffer unit 33 expands and tries to relieve the increased pressure. If the upper limit value of the chamber set pressure is still exceeded, it is determined that the chamber set pressure is not maintained, the process proceeds to NO in step S5, and the blower rotational speed is increased in step S6.
- step S6 when the blower rotational speed is increased, the pressure in the chamber 12 is decreased.
- step S7 it is determined whether or not the pressure in the chamber 12 falls within the chamber set pressure. That is, when the pressure in the chamber 12 falls within the range of the threshold value (upper limit value and lower limit value) of the chamber set pressure, it is determined that the pressure has fallen within the chamber set pressure, and the process proceeds to YES in step S7. Is reduced. Then, the normal operation mode is executed again, and the chamber set pressure is adjusted to the optimum value by the auto tuning function described above.
- step S7 If it is determined in step S7 that the pressure in the chamber 12 is not within the chamber set pressure, the process proceeds in the NO direction in step S7, and the supply amount of the inert gas is suppressed in step S9. Specifically, the degree of opening and closing is adjusted by enlarging the restriction of the regulator 22 of the gas supply unit 20.
- step S10 it is determined whether or not the pressure in the chamber 12 falls within the chamber set pressure. That is, it is determined whether or not the pressure in the chamber 12 falls within the range of the threshold value (upper limit value and lower limit value) of the chamber set pressure. If the pressure does not fall within the threshold range, the process proceeds to NO in step S10. The regulator 22 is adjusted.
- step S10 If it is determined that the pressure in the chamber 12 has entered the threshold range, the process proceeds in the direction of YES in step S10, the normal operation mode is executed, and the chamber setting pressure is set to the optimum value by the auto tuning function described above. It is adjusted to become.
- the pressure in the chamber 12 is set to the chamber set pressure. Can be stably maintained. That is, even if the supply flow rate of the inert gas varies, the exhaust flow rate is adjusted according to the supply flow rate, so that the inside of the chamber 12 is maintained at a constant chamber set pressure, and at the initial operation, The time required to increase the supply flow rate of the active gas to make the inside of the chamber 12 an inert gas can be shortened.
- the oxygen concentration is measured as a condition for operating the substrate processing apparatus 10
- the dew point temperature is measured together with the oxygen concentration, and both the oxygen concentration and the dew point temperature are measured in the substrate processing apparatus 10. You may make it the conditions to operate.
- a dew point thermometer is installed in the chamber 12 and is configured to switch from the initial operation mode to the normal operation mode based on the data obtained by the dew point thermometer and the data obtained by the oxygen concentration meter 16. Also good.
- blower 32 is provided in the gas exhaust unit 30
- a vacuum pump or a process pump may be used. Even in these cases, the gas in the chamber 12 can be exhausted sufficiently.
- Substrate processing system 10 Substrate processing apparatus 12 Chamber 20 Gas supply part 21 Supply piping 22 Regulator 30 Gas exhaust part 31 Exhaust pipe 32 Blower 33 Buffer part 40 Substrate processing part 90 Control apparatus
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Abstract
Description
10 基板処理装置
12 チャンバー
20 ガス供給部
21 供給配管
22 レギュレータ
30 ガス排気部
31 排気配管
32 ブロワ
33 バッファー部
40 基板処理部
90 制御装置
Claims (4)
- 基板に対し所定の処理を行う基板処理部と、
前記基板処理部を密封状態に収容するチャンバーと、
チャンバー内に不活性ガスを供給するガス供給部と、
チャンバー内のガスを排気するガス排気部と、
を備えており、
前記チャンバー内の圧力がチャンバー外の圧力よりも高いチャンバー設定圧力になるように、前記チャンバー内の圧力に基づいて、前記ガス供給部の不活性ガスの供給流量と前記ガス排気部の排気流量とが調整されることを特徴とする基板処理システム。 - 前記チャンバー設定圧力には、上限圧力値と下限圧力値とが設定されており、チャンバー内の圧力が上限圧力値と下限圧力値との間に維持されるように、前記ガス供給部の不活性ガスの供給流量と前記ガス排気部の排気流量とが調整されることを特徴とする基板処理システム。
- 前記ガス供給部の供給流量と前記ガス排気部の排気流量とを共に大きくしてチャンバー内の圧力をチャンバー設定圧力に維持する初期運転モードと、
前記初期運転モードよりも前記ガス供給部の供給流量と前記ガス排気部の排気流量とを共に小さくしてチャンバー内の圧力をチャンバー設定圧力に維持する通常運転モードとを有しており、
前記初期運転モードは、チャンバー内の酸素濃度が設定値以下になった場合に通常運転モードに切替えられることを特徴とする基板処理システム。 - 前記ガス排気部には、チャンバーに連通して接続される排気配管を有しており、この排気配管には排気配管内の圧力変動に応じて容積を変えることのできるバッファー部を有しており、このバッファー部の容積が変化することにより、チャンバー内の急な圧力変動が吸収されることを特徴とする基板処理システム。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/825,957 US20130180451A1 (en) | 2010-09-27 | 2011-07-29 | Substrate treatment system |
KR1020137006668A KR101872243B1 (ko) | 2010-09-27 | 2011-07-29 | 기판 처리 시스템 |
CN201180046080.9A CN103125012B (zh) | 2010-09-27 | 2011-07-29 | 基板处理系统 |
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JP2010-215801 | 2010-09-27 | ||
JP2010215801A JP5501916B2 (ja) | 2010-09-27 | 2010-09-27 | 基板処理システム |
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WO2012043053A1 true WO2012043053A1 (ja) | 2012-04-05 |
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PCT/JP2011/067411 WO2012043053A1 (ja) | 2010-09-27 | 2011-07-29 | 基板処理システム |
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US (1) | US20130180451A1 (ja) |
JP (1) | JP5501916B2 (ja) |
KR (1) | KR101872243B1 (ja) |
CN (1) | CN103125012B (ja) |
WO (1) | WO2012043053A1 (ja) |
Cited By (1)
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US20160351427A1 (en) * | 2014-02-07 | 2016-12-01 | Murata Machinery, Ltd. | Purge device and purge method |
Families Citing this family (9)
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JP6017396B2 (ja) * | 2012-12-18 | 2016-11-02 | 東京エレクトロン株式会社 | 薄膜形成方法および薄膜形成装置 |
WO2014119735A1 (ja) * | 2013-01-31 | 2014-08-07 | 株式会社ニコン | 処理装置、噴射処理方法および電極材料の製造方法 |
JP6403431B2 (ja) * | 2013-06-28 | 2018-10-10 | 株式会社Kokusai Electric | 基板処理装置、流量監視方法及び半導体装置の製造方法並びに流量監視プログラム |
JP2015025623A (ja) * | 2013-07-26 | 2015-02-05 | 光洋サーモシステム株式会社 | 熱処理装置用のチャンバ、および、熱処理装置 |
CN104281007A (zh) * | 2014-08-06 | 2015-01-14 | 深圳市华星光电技术有限公司 | 光刻胶供给装置及涂布机 |
JP6645009B2 (ja) * | 2015-01-07 | 2020-02-12 | 岩崎電気株式会社 | 紫外線硬化処理システム |
JP6626322B2 (ja) * | 2015-11-27 | 2019-12-25 | Ckd株式会社 | 気体圧駆動機器、及びその制御方法 |
JP7030414B2 (ja) * | 2017-02-14 | 2022-03-07 | 株式会社Screenホールディングス | 基板処理方法及びその装置 |
KR20200022682A (ko) * | 2018-08-23 | 2020-03-04 | 세메스 주식회사 | 버퍼 유닛, 그리고 이를 가지는 기판 처리 장치 및 방법 |
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- 2011-07-29 KR KR1020137006668A patent/KR101872243B1/ko active IP Right Grant
- 2011-07-29 WO PCT/JP2011/067411 patent/WO2012043053A1/ja active Application Filing
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Also Published As
Publication number | Publication date |
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JP2012074408A (ja) | 2012-04-12 |
US20130180451A1 (en) | 2013-07-18 |
CN103125012B (zh) | 2016-01-20 |
JP5501916B2 (ja) | 2014-05-28 |
CN103125012A (zh) | 2013-05-29 |
KR20130123374A (ko) | 2013-11-12 |
KR101872243B1 (ko) | 2018-06-28 |
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