WO2019159742A1 - 基板処理装置、基板処理方法及び記憶媒体 - Google Patents
基板処理装置、基板処理方法及び記憶媒体 Download PDFInfo
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- WO2019159742A1 WO2019159742A1 PCT/JP2019/003906 JP2019003906W WO2019159742A1 WO 2019159742 A1 WO2019159742 A1 WO 2019159742A1 JP 2019003906 W JP2019003906 W JP 2019003906W WO 2019159742 A1 WO2019159742 A1 WO 2019159742A1
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- moving body
- control command
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- movement
- nozzle
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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
- H01L21/6715—Apparatus for applying a liquid, a resin, an ink or the like
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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
- B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
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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
- B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
- B05C11/02—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface
- B05C11/08—Spreading liquid or other fluent material by manipulating the work, e.g. tilting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/002—Processes for applying liquids or other fluent materials the substrate being rotated
- B05D1/005—Spin coating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/40—Distributing applied liquids or other fluent materials by members moving relatively to surface
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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
- G03F7/162—Coating on a rotating support, e.g. using a whirler or a spinner
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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
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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
- H01L21/67259—Position monitoring, e.g. misposition detection or presence detection
Definitions
- the present disclosure relates to a substrate processing apparatus, a substrate processing method, and a storage medium.
- Patent Document 1 discloses a nozzle mechanism that dissolves and removes a drug film formed on a peripheral edge of a semiconductor substrate, a sensor that is attached to the nozzle mechanism and detects the position of the peripheral portion of the semiconductor substrate, and a drive mechanism that moves the nozzle mechanism. And a control system that controls the drive mechanism so that the peripheral portion of the drug film can be dissolved and removed with a desired width based on the signal detected by the sensor.
- This disclosure is intended to provide a substrate processing apparatus effective for improving the accuracy of the supply position of the processing liquid with respect to the peripheral edge of the substrate.
- a substrate processing apparatus detects information related to a position of a moving body, a liquid supply section having a nozzle for discharging a processing liquid to a peripheral portion of the substrate, a driving section that moves a moving body that includes the nozzle.
- a control command for moving the moving body from the first position where the nozzle is disposed outside the periphery of the substrate to the second position where the nozzle is disposed on the periphery of the substrate;
- a control command to reduce the deviation between the movement completion position of the moving body and the second position based on the relationship between the control command and the information detected by the sensor during the movement of the moving body from the position to the second position.
- a control unit configured to execute.
- the substrate processing apparatus information on the position of the moving body is detected during the movement of the moving body, and the control command is corrected based on the information, whereby the deviation between the movement completion position of the moving body and the second position is detected. Can be reduced. Note that according to the method based on the relationship between the information related to the position of the moving body and the control command, there is no need to place a sensor on the moving body itself as in the method of detecting the peripheral edge of the substrate. Can be avoided. Further, based on the relationship between the information related to the position of the moving body and the control command, the control command can be corrected with a margin at an arbitrary timing without detecting the peripheral edge of the substrate. Therefore, this substrate processing apparatus is effective in improving the accuracy of the supply position of the processing liquid with respect to the peripheral edge of the substrate.
- the control unit further executes control of the driving unit so as to temporarily stop the movement of the moving body from the first position to the second position before the nozzle reaches the peripheral edge of the substrate.
- the control command may be corrected based on information detected by the sensor when the movement of the moving body to the second position is temporarily stopped. In this case, the control command can be corrected with a margin at a timing before the nozzle reaches the peripheral edge of the substrate.
- the control unit is configured to further control the liquid supply unit so that the processing liquid is discharged from the nozzle when the movement of the moving body from the first position to the second position is temporarily stopped. May be.
- the discharge of the processing liquid can be started using the timing of the temporary stop, and the particles contained in the processing liquid at the start of the discharge can be prevented from adhering to the substrate.
- the control unit performs control based on information detected by the sensor after the elapse of the standby time for attenuating the vibration of the moving body after the start of the period in which the movement of the moving body from the first position to the second position is temporarily stopped. It may be configured to correct the command. In this case, it is possible to suppress a decrease in the accuracy of the supply position of the processing liquid due to variations in information detected by the sensor.
- the control unit derives a statistical value of information detected by the sensor in a predetermined period longer than the vibration period of the moving body after the start of the period in which the movement of the moving body from the first position to the second position is temporarily stopped.
- the control command may be corrected based on the statistical value. In this case, it is possible to suppress a decrease in the accuracy of the supply position of the processing liquid due to variations in position information.
- the control unit may be configured to further adjust the correction amount of the control command based on a deviation between the movement completion position of the moving body corresponding to the corrected control command and the second position. Good. In this case, the deviation between the movement completion position of the moving body and the second position can be further reduced.
- the second position where the nozzle is disposed on the peripheral portion of the substrate Control of the driving unit to move the moving body including the nozzle, information on the position of the moving body detected during the movement of the moving body from the first position to the second position, and a control command to the driving unit And correcting the control command to the drive unit so as to reduce the deviation between the movement completion position of the moving body and the second position.
- the storage medium according to the present disclosure is a computer-readable storage medium that stores a program for causing the apparatus to execute the substrate processing method.
- the substrate processing system 1 is a system for forming a photosensitive film, exposing the photosensitive film, and developing the photosensitive film on a substrate.
- the substrate to be processed is, for example, a semiconductor wafer W.
- the photosensitive film is, for example, a resist film.
- the substrate processing system 1 includes a coating / developing device 2 and an exposure device 3.
- the exposure apparatus 3 performs an exposure process on a resist film (photosensitive film) formed on the wafer W (substrate). Specifically, the exposure target portion of the resist film is irradiated with energy rays by a method such as immersion exposure.
- the coating / developing apparatus 2 performs a process of forming a resist film on the surface of the wafer W (substrate) before the exposure process by the exposure apparatus 3, and performs a development process of the resist film after the exposure process.
- the coating / developing apparatus 2 includes a carrier block 4, a processing block 5, an interface block 6, and a control unit 100.
- the carrier block 4 introduces the wafer W into the coating / developing apparatus 2 and derives the wafer W from the coating / developing apparatus 2.
- the carrier block 4 can support a plurality of carriers C for the wafer W, and incorporates a delivery arm A1.
- the carrier C accommodates a plurality of circular wafers W, for example.
- the delivery arm A1 takes out the wafer W from the carrier C and delivers it to the processing block 5, receives the wafer W from the processing block 5, and returns it to the carrier C.
- the processing block 5 includes a plurality of processing modules 11, 12, 13, and 14.
- the processing modules 11, 12, and 13 include a coating unit U1, a heat treatment unit U2, and a transfer arm A3 that transfers the wafer W to these units.
- the processing module 11 forms a lower layer film on the surface of the wafer W by the coating unit U1 and the heat treatment unit U2.
- the coating unit U1 of the processing module 11 applies a processing liquid for forming a lower layer film on the wafer W.
- the heat treatment unit U2 of the processing module 11 performs various heat treatments accompanying the formation of the lower layer film.
- the processing module 12 forms a resist film on the lower layer film by the coating unit U1 and the heat treatment unit U2.
- the coating unit U1 of the processing module 12 applies a processing liquid for forming a resist film on the lower layer film.
- the heat treatment unit U2 of the processing module 12 performs various heat treatments accompanying the formation of the resist film.
- the processing module 13 forms an upper layer film on the resist film by the coating unit U1 and the heat treatment unit U2.
- the coating unit U1 of the processing module 13 applies a liquid for forming an upper layer film on the resist film.
- the heat treatment unit U2 of the processing module 13 performs various heat treatments accompanying the formation of the upper layer film.
- the processing module 14 includes a developing unit U3, a heat treatment unit U4, and a transfer arm A3 that transfers the wafer W to these units.
- the processing module 14 develops the resist film after the exposure by the developing unit U3 and the heat treatment unit U4.
- the developing unit U3 applies a developing solution on the exposed surface of the wafer W, and then rinses the developing solution with a rinsing solution, thereby developing the resist film.
- the heat treatment unit U4 performs various heat treatments associated with the development processing. Specific examples of the heat treatment include heat treatment before development processing (PEB: Post Exposure Bake), heat treatment after development processing (PB: Post Bake), and the like.
- a shelf unit U10 is provided on the carrier block 4 side in the processing block 5.
- the shelf unit U10 is partitioned into a plurality of cells arranged in the vertical direction.
- An elevating arm A7 is provided in the vicinity of the shelf unit U10. The raising / lowering arm A7 raises / lowers the wafer W between the cells of the shelf unit U10.
- a shelf unit U11 is provided on the interface block 6 side in the processing block 5.
- the shelf unit U11 is partitioned into a plurality of cells arranged in the vertical direction.
- the interface block 6 delivers the wafer W to and from the exposure apparatus 3.
- the interface block 6 includes a delivery arm A8 and is connected to the exposure apparatus 3.
- the delivery arm A8 delivers the wafer W arranged on the shelf unit U11 to the exposure apparatus 3, receives the wafer W from the exposure apparatus 3, and returns it to the shelf unit U11.
- the control unit 100 controls the coating / developing apparatus 2 to execute the coating / developing process in the following procedure, for example. First, the control unit 100 controls the transfer arm A1 so as to transfer the wafer W in the carrier C to the shelf unit U10, and controls the lifting arm A7 so that the wafer W is arranged in the cell for the processing module 11.
- control unit 100 controls the transfer arm A3 so as to transfer the wafer W of the shelf unit U10 to the coating unit U1 and the heat treatment unit U2 in the processing module 11, and forms a lower layer film on the surface of the wafer W.
- the coating unit U1 and the heat treatment unit U2 are controlled.
- control unit 100 controls the transfer arm A3 so as to return the wafer W on which the lower layer film is formed to the shelf unit U10, and controls the lifting arm A7 so as to place the wafer W in the cell for the processing module 12. .
- control unit 100 controls the transfer arm A3 to transfer the wafer W of the shelf unit U10 to the coating unit U1 and the heat treatment unit U2 in the processing module 12, and forms a resist film on the lower layer film of the wafer W.
- the coating unit U1 and the heat treatment unit U2 are controlled.
- the control unit 100 controls the transfer arm A3 so as to return the wafer W to the shelf unit U10, and controls the lifting arm A7 so as to place the wafer W in the cell for the processing module 13.
- control unit 100 controls the transfer arm A3 so as to transfer the wafer W of the shelf unit U10 to each unit in the processing module 13, and the coating unit so as to form an upper layer film on the resist film of the wafer W.
- U1 and heat treatment unit U2 are controlled.
- the control unit 100 controls the transfer arm A3 so as to transfer the wafer W to the shelf unit U11.
- control unit 100 controls the delivery arm A8 so as to send the wafer W of the shelf unit U11 to the exposure apparatus 3. Thereafter, the control unit 100 receives the wafer W that has been subjected to the exposure process from the exposure apparatus 3, and controls the transfer arm A8 so as to be placed in the cell for the processing module 14 in the shelf unit U11.
- control unit 100 controls the transfer arm A3 so as to transfer the wafer W of the shelf unit U11 to each unit in the processing module 14, and the developing unit U3 and the developing unit U3 so as to perform development processing on the resist film of the wafer W.
- the heat treatment unit U4 is controlled.
- control unit 100 controls the transfer arm A3 so as to return the wafer W to the shelf unit U10, and controls the lift arm A7 and the transfer arm A1 so as to return the wafer W into the carrier C.
- the coating / developing process is completed.
- the specific configuration of the substrate processing apparatus is not limited to the configuration of the coating / developing apparatus 2 exemplified above.
- the substrate processing apparatus may be anything as long as it includes the coating unit U1 and the control unit 100 that can control the coating unit U1.
- the coating unit U ⁇ b> 1 includes a rotation holding unit 20, a coating liquid supply unit 30, a drive unit 40, a removal liquid supply unit 50, a drive unit 60, and a sensor 70.
- the rotation holding unit 20 holds and rotates the wafer W.
- the rotation holding unit 20 includes a holding unit 21 and a rotation driving unit 22.
- the holding unit 21 supports the central portion of the wafer W that is horizontally disposed with the surface Wa facing up, and holds the wafer W by, for example, vacuum suction or the like.
- the rotation drive unit 22 is an actuator that uses, for example, an electric motor as a power source, and rotates the holding unit 21 around a vertical rotation center CL1. As a result, the wafer W also rotates.
- the coating liquid supply unit 30 supplies a coating liquid (for example, a processing liquid for forming a lower layer film, a resist film, or an upper layer film) to the surface Wa of the wafer W.
- the coating liquid supply unit 30 includes a moving body 31 including a coating liquid nozzle 32 for discharging the coating liquid onto the wafer W, and a coating liquid source 33.
- the coating liquid nozzle 32 is open on the surface Wa side (downward) of the wafer W, and discharges the coating liquid downward.
- the coating liquid source 33 supplies the coating liquid to the coating liquid nozzle 32.
- the driving unit 40 moves the moving body 31 including the coating liquid nozzle 32.
- the drive unit 40 includes a power source 41 such as an electric motor, and a transmission mechanism 42 that transmits the power of the power source 41 to the moving body 31.
- the transmission mechanism 42 includes, for example, a speed reducer 43 and a timing belt 44, and converts the rotational torque of the power source 41 into a translational force and transmits it to the moving body 31.
- the removal liquid supply unit 50 supplies a processing liquid (hereinafter referred to as “removal liquid”) for removing the coating film of the component of the coating liquid to the peripheral portion of the surface Wa of the wafer W (a portion near the peripheral edge Wc). To do.
- the removal liquid supply unit 50 includes a moving body 51 including a removal liquid nozzle 52 for discharging the removal liquid to the peripheral edge of the wafer W, and a removal liquid source 53.
- the removal liquid nozzle 52 is open on the surface Wa side (downward) of the wafer W, and discharges the removal liquid downward.
- the removal liquid source 53 supplies the removal liquid to the removal liquid nozzle 52.
- the removal liquid is, for example, an organic solvent that dissolves the coating film as a component of the coating liquid.
- the driving unit 60 moves the moving body 51 including the removal liquid nozzle 52.
- the drive unit 60 includes a power source 61 such as an electric motor, and a removal liquid nozzle 52 that transmits the power of the power source 61 to the moving body 51.
- the power source 61 may be a motor that can be controlled by an open loop method (a control method that does not involve control amount feedback), or may be controlled by a closed loop method (a control method that involves control amount feedback). It may be a motor.
- a specific example of a motor that can be controlled by the open loop method is a stepping motor.
- a specific example of a motor that can be controlled by the closed loop method is a servo motor or the like.
- the transmission mechanism 62 includes, for example, a speed reducer 63, a timing belt 64, and the like, and converts the rotational torque of the power source 61 into a translational force and transmits it to the moving body 51.
- an error due to an error for example, a backlash of the speed reducer 63 and an extension of the timing belt 64
- the error may change over time due to a change in the characteristics of the transmission mechanism 62 (for example, a change in the extension amount of the timing belt 64).
- the sensor 70 detects information related to the position of the moving body 51.
- the information regarding the position of the moving body 51 may be information that directly indicates the position of the moving body 51, or may be information that indirectly indicates the position of the moving body 51.
- Specific examples of the sensor 70 include a position sensor that detects the position of the moving body 51 using an optical or magnetic linear scale, a non-contact distance sensor such as a laser displacement meter, and the like.
- the sensor 70 may be a sensor that detects the arrival of the moving body 51 at the installation position, such as a photo interrupter. In this case, the arrival time of the moving body 51 at the installation position can be detected as information on the position. Also by the arrival time, information on the position can be obtained based on the delay or advance with respect to the target time (design time ignoring the above-described error).
- the coating unit U1 configured as described above is controlled by the control unit 100.
- the control unit 100 moves the moving body 51 from the first position P1 where the removal liquid nozzle 52 is disposed outside the periphery Wc of the wafer W to the second position P2 where the removal liquid nozzle 52 is disposed on the periphery of the wafer W.
- the control command is corrected so as to reduce the deviation between the movement completion position of the body 51 and the second position P2.
- the control unit 100 temporarily stops the movement of the moving body 51 from the first position P1 to the second position P2 before the removal liquid supply position from the removal liquid nozzle 52 reaches the peripheral edge Wc of the wafer W. Further controlling the drive unit 60 and correcting the control command based on information detected by the sensor 70 when the movement of the moving body 51 from the first position P1 to the second position P2 is temporarily stopped. It may be configured to.
- the control unit 100 controls the removal liquid supply unit 50 to discharge the removal liquid from the removal liquid nozzle 52 when the movement of the moving body 51 from the first position P1 to the second position P2 is temporarily stopped. May be further executed.
- the control unit 100 is detected by the sensor 70 after the elapse of a standby time for attenuating the vibration of the moving body 51 after the start of the period in which the movement of the moving body 51 from the first position P1 to the second position P2 is temporarily stopped.
- the control command may be corrected based on the information.
- the control unit 100 stores the information detected by the sensor 70 in a predetermined period longer than the vibration period of the moving body 51.
- the statistical value may be derived, and the control command may be corrected based on the statistical value.
- control unit 100 includes a rotation control unit 119, a coating liquid nozzle movement control unit 112, a coating liquid supply control unit 111, and a removal liquid nozzle movement control as functional configurations (hereinafter referred to as “functional modules”).
- Unit 114, removal liquid supply control unit 113, control command holding unit 116, control command correction unit 117, and correction amount adjustment unit 118 are functional configurations (hereinafter referred to as “functional modules”).
- the rotation control unit 119 controls the rotation holding unit 20 to hold and rotate the wafer W.
- the coating liquid nozzle movement control unit 112 places the coating liquid nozzle 32 on the standby position where the coating liquid nozzle 32 is disposed outside the peripheral edge Wc of the wafer W held by the rotation holding unit 20 and on the center of the surface Wa of the wafer W.
- the drive unit 40 is controlled to move the moving body 31 between the application target positions to be arranged.
- the coating liquid supply control unit 111 controls the coating liquid supply unit 30 to supply the coating liquid to the surface Wa of the wafer W held by the rotation control unit 119.
- the coating liquid supply control unit 111 controls the coating liquid supply unit 30 to supply the coating liquid from the coating liquid source 33 to the coating liquid nozzle 32 in a state where the moving body 31 is at the target coating position.
- the removal liquid nozzle movement control unit 114 has a standby position (first position) where the removal liquid nozzle 52 is disposed outside the periphery Wc of the wafer W held by the rotation holding unit 20, and the removal liquid on the periphery of the wafer W.
- the drive unit 60 is controlled to move the moving body 51 between the removal target position (second position) where the nozzle 52 is disposed.
- the removal liquid nozzle movement control unit 114 controls the moving body 51 from the standby position to the removal target position (hereinafter, referred to as “outward control command”), and from the removal target position to the standby position.
- a control command (hereinafter referred to as “return path control command”) for moving the moving body 51 is output to the drive unit 60.
- the removal liquid nozzle movement control unit 114 may be configured to control the drive unit 60 by the open loop method, or may be configured to control the drive unit 60 by the closed loop method. Good.
- the removal liquid nozzle movement control unit 114 controls the drive unit 60 so that the movement of the moving body 51 from the standby position to the removal target position is temporarily stopped before the removal liquid nozzle 52 reaches the peripheral edge Wc of the wafer W. It may be configured to perform further. That the removal liquid nozzle 52 reaches the peripheral edge Wc of the wafer W means that the intersection of the center line of the opening of the removal liquid nozzle 52 and the plane along the surface Wa reaches the peripheral edge Wc.
- the temporary stop means that the movement according to the control command is stopped. That is, after the movement according to the control command is stopped, the state where the vibration caused by the inertia continues is also included in the temporarily stopped state.
- the removal liquid supply control unit 113 controls the removal liquid supply unit 50 so that the removal liquid is discharged from the removal liquid nozzle 52 to the peripheral portion of the wafer W.
- the removal liquid supply control unit 113 controls the removal liquid supply unit 50 so as to supply the removal liquid from the removal liquid source 53 to the removal liquid nozzle 52 in a state where at least the removal liquid nozzle 52 is on the peripheral edge of the wafer W.
- the removal liquid supply control unit 113 controls the removal liquid supply unit 50 so that the removal liquid is discharged from the removal liquid nozzle 52 even when the movement of the moving body 51 from the standby position to the removal target position is temporarily stopped. May be.
- the removal liquid supply control unit 113 starts supplying the removal liquid from the removal liquid source 53 to the removal liquid nozzle 52 when the movement of the moving body 51 from the standby position to the removal target position is temporarily stopped, and then
- the removal liquid supply unit 50 may be controlled so that the supply of the removal liquid from the removal liquid source 53 to the removal liquid nozzle 52 is continued until the discharge of the removal liquid to the peripheral portion of the wafer W is completed.
- the control command holding unit 116 stores the forward path control command and the backward path control command.
- the control command correction unit 117 performs the movement completion position and removal of the moving body 51 based on the relationship between the information detected by the sensor 70 during the movement of the moving body 51 from the standby position to the removal target position and the forward path control command.
- the forward control command is corrected so as to reduce the deviation from the target position.
- the control command correction unit 117 calculates the deviation of the position of the moving body 51 with respect to the forward path control command based on the relationship between the information detected by the sensor 70 and the forward path control command, and the forward path so as to reduce the deviation. Correct the control command.
- control is performed.
- the command correction unit 117 corrects the forward path control command so as to increase the moving distance of the moving body 51 after the detection time.
- the control command correction unit 117 determines the moving distance of the moving body 51 after the detection time. The forward control command is corrected so as to shorten it.
- the control command correction unit 117 corrects the control command as follows. That is, when the arrival time of the moving body 51 at the installation position of the sensor 70 is later than the target time, the control command correction unit 117 corrects the forward path control command so as to increase the moving distance of the moving body 51 after the detection time. To do. On the other hand, when the arrival time of the moving body 51 at the installation position of the sensor 70 is earlier than the target time, the control command correcting unit 117 issues an outward path control command so as to shorten the moving distance of the moving body 51 after the detection time. to correct.
- the control command correction unit 117 is configured to correct the forward path control command based on the information detected by the sensor 70 when the movement of the moving body 51 from the standby position to the removal target position is temporarily stopped. Also good.
- the control command correction unit 117 is detected by the sensor 70 after the elapse of the standby time for attenuating the vibration of the moving body 51 after the start of the period in which the movement of the moving body 51 from the standby position to the removal target position is temporarily stopped.
- the control command may be corrected based on the information.
- the control command correction unit 117 performs statistical processing on information detected by the sensor 70 in a predetermined period longer than the vibration period of the moving body 51 after the period in which the movement of the moving body 51 from the standby position to the removal target position is temporarily stopped. A value (for example, an average value) may be derived, and the control command may be corrected based on the statistical value.
- the correction amount adjustment unit 118 Based on the deviation between the movement completion position of the moving body 51 in accordance with the forward path control command corrected by the control command correction unit 117 and the removal target position, the correction amount adjustment unit 118 receives the control command from the control command correction unit 117. Adjust the correction amount.
- the correction amount of the control command by the control command correction unit 117 means, for example, an amount that increases or decreases the moving distance of the moving body 51 after the detection time point.
- the correction amount adjustment unit 118 has an excessively small correction amount based on the deviation between the movement completion position of the moving body 51 and the removal target position according to the forward path control command after correction by the control command correction unit 117.
- the correction amount is increased.
- the correction amount is decreased.
- Specific examples of cases where it is determined that the correction amount is too small include a case where the movement completion position of the moving body 51 does not reach the removal target position even though the movement distance after the detection time is increased, and the detection described above. There is a case where the movement completion position of the moving body 51 has passed the removal target position even though the movement distance after the time is shortened.
- the control unit 100 includes one or a plurality of control computers.
- the control unit 100 includes a circuit 120 illustrated in FIG.
- the circuit 120 includes one or more processors 121, a memory 122, a storage 123, an input / output port 124, and a timer 125.
- the storage 123 includes a computer-readable storage medium such as a hard disk.
- the storage medium stores a program for causing the coating unit U1 to execute a substrate processing procedure described later.
- the storage medium may be a removable medium such as a nonvolatile semiconductor memory, a magnetic disk, and an optical disk.
- the memory 122 temporarily stores the program loaded from the storage medium of the storage 123 and the calculation result by the processor 121.
- the processor 121 configures each functional module described above by executing the program in cooperation with the memory 122.
- the input / output port 124 inputs and outputs electrical signals between the rotation holding unit 20, the coating liquid supply unit 30, the drive unit 40, the removal liquid supply unit 50, the drive unit 60, and the sensor 70 in accordance with a command from the processor 121. Do.
- the timer 125 measures the elapsed time by, for example, counting a reference pulse with a fixed period.
- the hardware configuration of the control unit 100 is not necessarily limited to the configuration of each functional module by a program.
- each functional module of the control unit 100 may be configured by a dedicated logic circuit or an ASIC (Application Specific Integrated Circuit) in which the functional modules are integrated.
- ASIC Application Specific Integrated Circuit
- step S01 the rotation control unit 119 controls the rotation holding unit 20 so that the rotation driving unit 22 starts rotating the wafer W while the holding unit 21 holds the wafer W.
- step S ⁇ b> 02 is a step of controlling the coating liquid supply unit 30 and the driving unit 40 so as to apply the coating liquid to the surface Wa of the wafer W. Specific contents will be described later.
- Steps S03 and S04 are steps for controlling the rotation holding unit 20 so as to form a film by drying the liquid film of the coating liquid formed in step S02.
- the rotation control unit 119 controls the rotation holding unit 20 so as to change the rotation speed of the wafer W to a preset rotation speed for drying.
- the rotation control unit 119 waits for the elapse of a preset drying period.
- Steps S05 and S06 are steps for controlling the removal liquid supply unit 50 and the drive unit 60 so as to remove the peripheral edge portion of the coating formed in steps S02, S03, and S04.
- the rotation control unit 119 controls the rotation holding unit 20 so as to change the rotation speed of the wafer W to a preset rotation speed for edge removal.
- Step S06 is a step of controlling the removal liquid supply unit 50 and the drive unit 60 so as to supply the removal liquid to the peripheral edge of the wafer W. Specific contents will be described later.
- step S07 the rotation control unit 119 controls the rotation holding unit 20 to change the rotation speed of the wafer W to a preset rotation speed for drying.
- step S08 rotation control unit 119 waits for the elapse of a preset drying period.
- step S09 the rotation control unit 119 controls the rotation holding unit 20 so as to stop the rotation of the wafer W by the rotation driving unit 22. Thus, the film forming procedure is completed.
- step S02 the specific procedure of step S02 mentioned above is illustrated.
- the control unit 100 sequentially executes steps S11, S12, S13, S14, and S15.
- step S11 the coating liquid nozzle movement control unit 112 controls the driving unit 40 so as to move the moving body 31 from the standby position to the coating target position. As a result, the coating liquid nozzle 32 moves to the center of the wafer W (see FIG. 7A).
- step S12 the coating liquid supply control unit 111 controls the coating liquid supply unit 30 to start supplying the coating liquid L1 from the coating liquid source 33 to the coating liquid nozzle 32 (see FIG. 7B). .
- step S13 the coating liquid supply control unit 111 waits for a preset coating period to elapse.
- step S ⁇ b> 14 the coating liquid supply control unit 111 controls the coating liquid supply unit 30 to stop supplying the coating liquid from the coating liquid source 33 to the coating liquid nozzle 32.
- step S15 the coating liquid nozzle movement control unit 112 controls the driving unit 40 so as to move the moving body 31 from the coating target position to the standby position (see FIG. 7C). Thereby, the coating liquid nozzle 32 moves out of the peripheral edge Wc of the wafer W.
- the coating process procedure is completed.
- a liquid film of the coating liquid L1 is formed on the surface Wa of the wafer W.
- step S06 (Rim removal processing procedure) Then, the specific procedure of step S06 mentioned above is illustrated.
- the driving unit 60 is controlled to move the moving body 51 from the standby position to the removal target position, and the moving body detected during the movement of the moving body 51 from the standby position to the removal target position. Based on the relationship between the information on the position 51 and the control command to the drive unit 60, the control command to the drive unit 60 is corrected so as to reduce the deviation between the movement completion position of the moving body 51 and the removal target position. Including.
- step S21 the control unit 100 first executes step S21.
- step S ⁇ b> 21 the removal liquid nozzle movement control unit 114 outputs a control command for moving the moving body 51 from the standby position to the temporary stop target position (hereinafter, referred to as “outward first control command”) to the driving unit 60.
- the drive unit 60 temporarily stops after moving the moving body 51 according to the forward first control command (see FIG. 10A).
- the temporary stop target position is set so that the removal liquid nozzle 52 does not reach the peripheral edge Wc of the wafer W.
- step S ⁇ b> 22 the control command correction unit 117 waits for the elapse of a standby time set in advance to attenuate the vibration of the moving body 51.
- step S ⁇ b> 23 the control command correction unit 117 acquires information detected by the sensor 70.
- step S24 the control command correction unit 117 is configured to reduce the deviation between the movement completion position of the moving body 51 and the removal target position based on the relationship between the information acquired in step S23 and the forward control command. Correct the control command.
- the control command correction unit 117 responds to the forward control command based on the relationship between the position of the moving body 51 (hereinafter referred to as “current position”) based on the information acquired in step S23 and the temporary stop target position.
- a deviation of the position of the moving body 51 is calculated, and a control command from the temporary stop target position to the removal target position (hereinafter referred to as “outward second control command”) is corrected so as to reduce the deviation.
- the control command correction unit 117 performs the second outbound path control so as to increase the moving distance of the moving body 51 after the movement is resumed. Correct the command.
- the control command correction unit 117 corrects the forward second control command so as to shorten the moving distance of the moving body 51 after the movement is resumed. .
- step S25 the removal liquid supply control unit 113 controls the removal liquid supply unit 50 so as to start the supply of the removal liquid L2 from the removal liquid source 53 to the removal liquid nozzle 52 (see FIG. 10B).
- step S26 the removal liquid nozzle movement control unit 114 waits for the elapse of a preset dummy discharge time.
- step S27 the forward second control command corrected in step S24 is output to the drive unit 60. The drive unit 60 resumes the movement of the moving body 51 according to the forward second control command, and temporarily stops after moving the moving body 51 to the removal target position or the vicinity thereof. As a result, the removal liquid L2 is supplied to the peripheral edge of the wafer W (see FIG. 10C).
- step S31 the correction amount adjusting unit 118 waits for the elapse of a standby time set in advance to attenuate the vibration of the moving body 51.
- step S ⁇ b> 32 the correction amount adjustment unit 118 acquires information detected by the sensor 70.
- step S33 the correction amount adjustment unit 118 performs the next and subsequent times based on the deviation between the position of the moving body 51 (hereinafter referred to as “current position”) based on the information acquired in step S32 and the removal target position.
- step S24 the control command correction amount is adjusted.
- the correction amount adjusting unit 118 determines that the correction amount in step S24 is too small based on the deviation between the current position of the moving body 51 and the removal target position, and the next and subsequent times. If the correction amount in step S24 is increased and it is determined that the correction amount in step S24 is excessive, the correction amount in step S24 after the next time is reduced. For example, the correction amount adjusting unit 118 determines that the current position of the moving body 51 does not reach the removal target position in spite of increasing the movement distance after resuming movement in step S24, or the movement distance after resuming movement in step S24. When the current position of the moving body 51 has passed the removal target position despite the shortening, the amount of correction in the next step S24 is increased.
- the correction amount adjusting unit 118 increases the movement distance after resuming the movement in step S24, so that the movement completion position of the moving body 51 has passed the removal target position, or the movement distance after resuming the movement in step S24. If the movement completion position of the moving body 51 has not reached the removal target position as a result of shortening the correction amount, the correction amount in the next step S24 is reduced.
- step S ⁇ b> 34 the removal liquid nozzle movement control unit 114 outputs to the drive unit 60 a control command (hereinafter referred to as “return path first control command”) for moving the moving body 51 from the removal target position to the temporary stop target position. .
- the drive unit 60 temporarily stops after moving the moving body 51 in accordance with the return path first control command (see FIG. 11A).
- step S35 the removal liquid supply control unit 113 controls the removal liquid supply unit 50 so as to stop the supply of the removal liquid L2 from the removal liquid source 53 to the removal liquid nozzle 52.
- step S ⁇ b> 36 the removal liquid nozzle movement control unit 114 outputs a control command for moving the moving body 51 from the temporary stop target position to the standby position (hereinafter referred to as “return path second control command”) to the driving unit 60.
- the drive unit 60 stops after moving the moving body 51 according to the return path second control command (see FIG. 11B). This completes the peripheral edge removal processing procedure.
- the peripheral edge portion of the film F1 (the film formed by steps S03 and S04) on the surface Wa is removed.
- the coating / developing apparatus 2 includes the removal liquid supply unit 50 having the removal liquid nozzle 52 for discharging the removal liquid to the peripheral portion of the wafer W, and the moving body 51 including the removal liquid nozzle 52.
- a driving unit 60 that moves, a sensor 70 that detects information about the position of the moving body 51, and a removal liquid nozzle on the peripheral portion of the wafer W from the first position P1 where the removal liquid nozzle 52 is disposed outside the peripheral edge Wc of the wafer W.
- the control command for moving the moving body 51 to the second position P2 where the 52 is disposed is output to the driving unit 60, and the sensor 70 is moved during the movement of the moving body 51 from the first position P1 to the second position P2. Based on the relationship between the detected information and the control command, the control command is corrected so as to reduce the deviation between the movement completion position of the moving body 51 and the second position P2.
- the coating / developing apparatus 2 information on the position of the moving body 51 is detected during the movement of the moving body 51, and the control command is corrected based on the information, whereby the movement completion position of the moving body 51 and the first position are corrected.
- the deviation from the second position P2 can be reduced.
- the method based on the relationship between the information related to the position of the moving body 51 and the control command it is not necessary to arrange the sensor 70 on the moving body 51 itself unlike the method of detecting the peripheral edge Wc of the wafer W. An increase in the size of the moving body 51 due to the arrangement of 70 can be avoided.
- the present coating / developing apparatus 2 is effective in improving the accuracy of the supply position of the removal liquid with respect to the peripheral portion of the wafer W.
- FIG. 12 is a graph illustrating the relationship between the number of operations and the amount of deviation from the target position.
- the “deviation amount from the target position” is a deviation between the movement completion position of the moving body 51 corresponding to the forward path control command and the removal target position.
- the broken line in the graph indicates the amount of deviation of the target position when the control command correction unit 117 does not correct the control command.
- the solid line in the graph indicates the amount of deviation of the target position when the control command correction unit 117 corrects the control command.
- the shift amount indicated by the broken line greatly deviates from the range between the upper limit value UL and the lower limit value LL when the number of operations is small, and gradually falls within the range between the upper limit value UL and the lower limit value LL as the number of operations increases. It has converged. This is considered to be because the extension amount of the timing belt 64 is gradually stabilized. However, even after the convergence within the range of the upper limit value UL and the lower limit value LL, the deviation amount indicated by the broken line often reaches a value close to the lower limit value LL. This is considered to be because the influence of the backlash and the like of the reduction gear 63 still remains even after the extension amount of the timing belt 64 is stabilized.
- the deviation amount indicated by the solid line is within the range of the upper limit value UL and the lower limit value LL with a sufficient margin even when the number of operations is small, and the tendency is the same even when the number of operations increases. .
- the correction of the control command by the control command correction unit 117 is effective in improving the accuracy of the supply position of the processing liquid with respect to the peripheral portion of the substrate.
- the control unit 100 controls the driving unit 60 so that the movement of the moving body 51 from the first position P1 to the second position P2 is temporarily stopped before the removal liquid nozzle 52 reaches the peripheral edge Wc of the wafer W.
- the control command is corrected based on the information detected by the sensor 70 when the movement of the moving body 51 from the first position P1 to the second position P2 is temporarily stopped. May be. In this case, the control command can be corrected with a margin at the timing before the removal liquid nozzle 52 reaches the peripheral edge of the wafer W.
- the control unit 100 controls the removal liquid supply unit 50 to discharge the removal liquid from the removal liquid nozzle 52 when the movement of the moving body 51 from the first position P1 to the second position P2 is temporarily stopped. May be further executed. In this case, the discharge of the removal liquid is started using the timing of the temporary stop, and the particles contained in the removal liquid at the start of the discharge can be suppressed from adhering to the wafer W.
- the control unit 100 is detected by the sensor 70 after the elapse of a standby time for attenuating the vibration of the moving body 51 after the start of the period in which the movement of the moving body 51 from the first position P1 to the second position P2 is temporarily stopped.
- the control command may be corrected based on the information. In this case, it is possible to suppress a reduction in the accuracy of the supply position of the removal liquid due to variations in information detected by the sensor 70.
- the control unit 100 is configured to further execute the adjustment of the correction amount of the control command based on the deviation between the movement completion position of the movable body 51 corresponding to the corrected control command and the second position P2. It may be. In this case, the deviation between the movement completion position of the moving body 51 and the second position P2 can be further reduced.
- the control unit 100 After the start of the period in which the movement of the moving body 51 from the first position P1 to the second position P2 is temporarily stopped, the control unit 100 stores the information detected by the sensor 70 in a predetermined period longer than the vibration period of the moving body 51.
- the statistical value may be derived, and the control command may be corrected based on the statistical value. In this case, it is possible to suppress a decrease in the accuracy of the supply position of the removal liquid due to variations in position information.
- a peripheral edge removal processing procedure by the control unit 100 configured as described above will be specifically exemplified. As shown in FIG. 13, the control unit 100 first executes step S41. In step S ⁇ b> 41, the removal liquid nozzle movement control unit 114 outputs the forward first control command to the drive unit 60 as in step S ⁇ b> 21.
- step S ⁇ b> 42 the control command correction unit 117 acquires information detected by the sensor 70.
- step S ⁇ b> 43 the control command correction unit 117 checks whether or not a data collection period set in advance so as to be longer than the vibration cycle of the moving body 51 has elapsed. If it is determined in step S43 that the data collection period has not elapsed, the control unit 100 returns the process to step S42. Thereafter, acquisition of information detected by the sensor 70 is repeated until the data collection period elapses.
- step S44 the control command correction unit 117 derives a statistical value (for example, an average value) of the information detected by the sensor 70 in step S42.
- step S45 the control command correction unit 117 reduces the deviation between the movement completion position of the moving body 51 and the removal target position based on the relationship between the statistical value derived in step S44 and the forward first control command. Thus, the forward path control command is corrected.
- the specific processing content of step S45 is the same as that of step S24 except that the statistical value is used as information detected by the sensor 70.
- step S46 the removal liquid supply control unit 113 controls the removal liquid supply unit 50 so as to start the supply of the removal liquid L2 from the removal liquid source 53 to the removal liquid nozzle 52.
- step S47 the removal liquid nozzle movement control unit 114 waits for a preset dummy discharge time to elapse.
- step S48 the forward second control command corrected in step S45 is output to the drive unit 60.
- step S ⁇ b> 51 the control command correction unit 117 acquires information detected by the sensor 70.
- step S ⁇ b> 52 the control command correction unit 117 checks whether or not a data collection period set in advance so as to be longer than the vibration cycle of the moving body 51 has elapsed. If it is determined in step S52 that the data collection period has not elapsed, the control unit 100 returns the process to step S52. Thereafter, acquisition of information detected by the sensor 70 is repeated until the data collection period elapses.
- step S52 If it is determined in step S52 that the data collection period has elapsed, the control unit 100 executes step S53.
- step S53 the control command correction unit 117 derives a statistical value (for example, an average value) of the information detected by the sensor 70 in step S52.
- Step S54 the correction amount adjustment unit 118 performs the next and subsequent times based on the deviation between the position of the moving body 51 (hereinafter referred to as “current position”) based on the statistical value derived in step S53 and the removal target position.
- step S45 the control command correction amount is adjusted.
- the specific processing content of step S54 is the same as that of step S33, except that the statistical value is used as information detected by the sensor 70.
- step S ⁇ b> 55 the removal liquid nozzle movement control unit 114 outputs the return path first control command to the drive unit 60.
- step S56 the removal liquid supply control unit 113 controls the removal liquid supply unit 50 so as to stop the supply of the removal liquid L2 from the removal liquid source 53 to the removal liquid nozzle 52.
- step S ⁇ b> 57 the removal liquid nozzle movement control unit 114 outputs the return second control command to the drive unit 60. This completes the peripheral edge removal processing procedure.
- the controller may be configured not to temporarily stop the movement of the moving body 51 between the standby position and the removal target position.
- a peripheral edge removal processing procedure by the control unit 100 configured as described above will be specifically exemplified.
- the control unit 100 first executes steps S61 and S62 in order.
- step S61 the removal liquid nozzle movement control unit 114 controls the driving unit 60 to start the movement of the moving body 51 from the standby position to the removal target position in accordance with the forward path control command.
- step S62 the removal liquid supply control unit 113 waits for the progress of the control of the drive unit 60 for moving the moving body 51 to reach a preset discharge start stage.
- the discharge start stage is a stage at which, for example, the output of a control command (hereinafter referred to as “outward first control command”) for moving the moving body 51 to a preset discharge start position is completed.
- step S ⁇ b> 63 the control command correction unit 117 acquires information detected by the sensor 70.
- step S64 the control command correction unit 117 reduces the deviation between the movement completion position and the removal target position of the moving body 51 based on the relationship between the information acquired in step S63 and the forward first control command. Correct the outbound control command.
- step S65 the removal liquid supply control unit 113 controls the removal liquid supply unit 50 so as to start the supply of the removal liquid L2 from the removal liquid source 53 to the removal liquid nozzle 52.
- step S66 the removal liquid nozzle movement control unit 114 waits for the progress of the control of the driving unit 60 for moving the moving body 51 to reach a preset movement stop stage.
- the movement stop stage is a stage in which the output of the forward path control command corrected in step S64 is completed.
- step S67 the removal liquid supply control unit 113 controls the drive unit 60 so as to stop the movement of the moving body 51.
- the control unit 100 next executes steps S71 and S72 similar to steps S32 and S33 in order.
- step S ⁇ b> 71 the correction amount adjustment unit 118 acquires information detected by the sensor 70.
- step S72 the correction amount adjusting unit 118 adjusts the correction amount of the control command in the next step S64 based on the deviation between the position of the moving body 51 based on the information acquired in step S71 and the removal target position. To do.
- step S73 the removal liquid nozzle movement control unit 114 controls the drive unit 60 to start the movement of the moving body 51 from the removal target position to the standby position in accordance with the return path control command.
- step S74 the removal liquid supply control unit 113 waits for the progress of the control of the drive unit 60 for moving the moving body 51 to reach a preset discharge stop stage.
- the discharge stop stage is, for example, a stage at which the output of a control command (hereinafter referred to as “return path first control command”) for moving the moving body 51 to a preset discharge stop position is completed.
- step S75 the removal liquid supply control unit 113 controls the removal liquid supply unit 50 so as to stop the supply of the removal liquid L2 from the removal liquid source 53 to the removal liquid nozzle 52.
- step S76 the removal liquid nozzle movement control unit 114 waits for the progress of the control of the driving unit 60 for moving the moving body 51 to reach a preset movement stop stage.
- the movement stop stage is a stage where the output of the return path control command is completed.
- step S77 the removal liquid nozzle movement control unit 114 controls the drive unit 60 so as to stop the movement of the moving body 51. This completes the peripheral edge removal processing procedure.
- the process of supplying the processing liquid to the peripheral edge of the substrate is not limited to the process of supplying the removal liquid to the peripheral edge of the substrate.
- the process of supplying the processing liquid to the peripheral edge of the substrate may be a process of supplying a coating liquid to the peripheral edge of the substrate and forming a coating on the peripheral edge of the substrate.
- the substrate to be processed is not limited to a semiconductor wafer, and may be a glass substrate, a mask substrate, an FPD (Flat Panel Display), or the like.
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Abstract
Description
基板処理システム1は、基板に対し、感光性被膜の形成、当該感光性被膜の露光、及び当該感光性被膜の現像を施すシステムである。処理対象の基板は、例えば半導体のウェハWである。感光性被膜は、例えばレジスト膜である。基板処理システム1は、塗布・現像装置2と露光装置3とを備える。露光装置3は、ウェハW(基板)上に形成されたレジスト膜(感光性被膜)の露光処理を行う。具体的には、液浸露光等の方法によりレジスト膜の露光対象部分にエネルギー線を照射する。塗布・現像装置2は、露光装置3による露光処理の前に、ウェハW(基板)の表面にレジスト膜を形成する処理を行い、露光処理後にレジスト膜の現像処理を行う。
以下、基板処理装置の一例として、塗布・現像装置2の構成を説明する。図1及び図2に示すように、塗布・現像装置2は、キャリアブロック4と、処理ブロック5と、インタフェースブロック6と、制御部100とを備える。
続いて、上記塗布ユニットU1の構成を具体的に説明する。図3に示すように、塗布ユニットU1は、回転保持部20と、塗布液供給部30と、駆動部40と、除去液供給部50と、駆動部60と、センサ70とを備える。
以下、基板処理方法の一例として、塗布ユニットU1において実行される成膜処理手順を説明する。図5に示すように、制御部100は、まずステップS01,S02を順に実行する。ステップS01では、保持部21がウェハWを保持した状態にて、回転駆動部22によるウェハWの回転を開始するように、回転制御部119が回転保持部20を制御する。ステップS02は、ウェハWの表面Waに塗布液を塗布するように塗布液供給部30及び駆動部40を制御するステップである。具体的な内容については後述する。
続いて、上述したステップS02の具体的な手順を例示する。図6に示すように、制御部100は、ステップS11,S12,S13,S14,S15を順に実行する。ステップS11では、塗布液ノズル移動制御部112が、上記待機位置から上記塗布目標位置に移動体31を移動させるように駆動部40を制御する。これにより、塗布液ノズル32がウェハWの中心上に移動する(図7の(a)参照)。ステップS12では、塗布液供給制御部111が、塗布液源33から塗布液ノズル32への塗布液L1の供給を開始するように塗布液供給部30を制御する(図7の(b)参照)。ステップS13では、塗布液供給制御部111が、予め設定された塗布期間の経過を待機する。ステップS14では、塗布液供給制御部111が、塗布液源33から塗布液ノズル32への塗布液の供給を停止するように塗布液供給部30を制御する。ステップS15では、塗布液ノズル移動制御部112が、上記塗布目標位置から上記待機位置に移動体31を移動させるように駆動部40を制御する(図7の(c)参照)。これにより、塗布液ノズル32がウェハWの周縁Wc外に移動する。以上で塗布処理手順が完了する。塗布処理手順の実行により、ウェハWの表面Wa上に塗布液L1の液膜が形成される。
続いて、上述したステップS06の具体的な手順を例示する。この手順は、上記待機位置から上記除去目標位置に移動体51を移動させるように駆動部60を制御することと、待機位置から除去目標位置への移動体51の移動途中で検出された移動体51の位置に関する情報と、駆動部60への制御指令との関係に基づいて、移動体51の移動完了位置と除去目標位置との偏差を縮小するように駆動部60への制御指令を補正することと、を含む。
以上に説明したように、塗布・現像装置2は、ウェハWの周縁部に除去液を吐出するための除去液ノズル52を有する除去液供給部50と、除去液ノズル52を含む移動体51を移動させる駆動部60と、移動体51の位置に関する情報を検出するセンサ70と、ウェハWの周縁Wc外に除去液ノズル52を配置する第一位置P1からウェハWの周縁部上に除去液ノズル52を配置する第二位置P2に移動体51を移動させるための制御指令を駆動部60に出力することと、第一位置P1から第二位置P2への移動体51の移動途中でセンサ70により検出された情報と、制御指令との関係に基づいて、移動体51の移動完了位置と第二位置P2との偏差を縮小するように制御指令を補正することと、を実行するように構成されている制御部100と、を備える。
制御部100は、第一位置P1から第二位置P2への移動体51の移動が一時停止する期間の開始後、移動体51の振動周期よりも長い所定期間においてセンサ70により検出された情報の統計値を導出し、当該統計値に基づいて制御指令を補正するように構成されていてもよい。この場合、位置情報のばらつきに起因して、除去液の供給位置の精度が低下することを抑制することができる。以下、このように構成された制御部100による周縁除去処理手順を具体的に例示する。図13に示すように、制御部100は、まずステップS41を実行する。ステップS41では、除去液ノズル移動制御部114が、ステップS21と同様に、上記往路第一制御指令を駆動部60に出力する。
Claims (8)
- 基板の周縁部に処理液を吐出するためのノズルを有する液供給部と、
前記ノズルを含む移動体を移動させる駆動部と、
前記移動体の位置に関する情報を検出するセンサと、
前記基板の周縁外に前記ノズルを配置する第一位置から前記基板の周縁部上に前記ノズルを配置する第二位置に前記移動体を移動させるための制御指令を駆動部に出力することと、前記第一位置から前記第二位置への前記移動体の移動途中で前記センサにより検出された前記情報と、前記制御指令との関係に基づいて、前記移動体の移動完了位置と前記第二位置との偏差を縮小するように前記制御指令を補正することと、を実行するように構成されている制御部と、を備える基板処理装置。 - 前記制御部は、前記第一位置から前記第二位置への前記移動体の移動を、前記ノズルが前記基板の周縁上に到達する前に一時停止させるように前記駆動部を制御することを更に実行し、前記第一位置から前記第二位置への前記移動体の移動が一時停止しているときに前記センサにより検出された前記情報に基づいて前記制御指令を補正するように構成されている、請求項1記載の基板処理装置。
- 前記制御部は、前記第一位置から前記第二位置への前記移動体の移動が一時停止しているときに前記ノズルから前記処理液を吐出するように前記液供給部を制御することを更に実行するように構成されている、請求項2記載の基板処理装置。
- 前記制御部は、前記第一位置から前記第二位置への前記移動体の移動が一時停止する期間の開始後、前記移動体の振動を減衰させるための待機時間の経過後に前記センサにより検出された前記情報に基づいて前記制御指令を補正するように構成されている、請求項2又は3記載の基板処理装置。
- 前記制御部は、前記第一位置から前記第二位置への前記移動体の移動が一時停止する期間の開始後、前記移動体の振動周期よりも長い所定期間において前記センサにより検出された前記情報の統計値を導出し、当該統計値に基づいて前記制御指令を補正するように構成されている、請求項2~4のいずれか一項記載の基板処理装置。
- 前記制御部は、補正後の前記制御指令に応じた前記移動体の移動完了位置と、前記第二位置との偏差に基づいて、前記制御指令の補正量を調節することを更に実行するように構成されている、請求項1~5のいずれか一項記載の基板処理装置。
- 基板の周縁部に処理液を吐出するためのノズルを前記基板の周縁外に配置する第一位置から、前記ノズルを前記基板の周縁部上に配置する第二位置に、前記ノズルを含む移動体を移動させるように駆動部を制御することと、
前記第一位置から前記第二位置への前記移動体の移動途中で検出された前記移動体の位置に関する情報と、前記駆動部への制御指令との関係に基づいて、前記移動体の移動完了位置と前記第二位置との偏差を縮小するように前記駆動部への制御指令を補正することと、を含む基板処理方法。 - 請求項7記載の基板処理方法を装置に実行させるためのプログラムを記憶した、コンピュータ読み取り可能な記憶媒体。
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