WO2015136872A1 - 基板処理システムおよび配管洗浄方法 - Google Patents
基板処理システムおよび配管洗浄方法 Download PDFInfo
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- WO2015136872A1 WO2015136872A1 PCT/JP2015/001010 JP2015001010W WO2015136872A1 WO 2015136872 A1 WO2015136872 A1 WO 2015136872A1 JP 2015001010 W JP2015001010 W JP 2015001010W WO 2015136872 A1 WO2015136872 A1 WO 2015136872A1
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- Prior art keywords
- cleaning
- processing
- liquid
- pipe
- cleaning liquid
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/02041—Cleaning
- H01L21/02043—Cleaning before device manufacture, i.e. Begin-Of-Line process
- H01L21/02052—Wet cleaning only
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
-
- 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
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67017—Apparatus for fluid treatment
- H01L21/67028—Apparatus for fluid treatment for cleaning followed by drying, rinsing, stripping, blasting or the like
- H01L21/6704—Apparatus for fluid treatment for cleaning followed by drying, rinsing, stripping, blasting or the like for wet cleaning or washing
- H01L21/67051—Apparatus for fluid treatment for cleaning followed by drying, rinsing, stripping, blasting or the like for wet cleaning or washing using mainly spraying means, e.g. nozzles
-
- 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
Definitions
- the present invention relates to a substrate processing system for processing a substrate and a piping cleaning method for cleaning piping.
- a substrate processing apparatus is used to perform various processes on a substrate such as a semiconductor wafer.
- the substrate processing apparatus described in Patent Document 1 includes a plurality of processing units that process a substrate with a processing liquid, and a processing liquid supply unit that supplies the processing liquid to these processing units.
- the processing liquid supply unit includes a plurality of processing liquid supply modules. At the time of processing the substrate, the processing liquid is supplied from one of the plurality of processing liquid modules to the nozzle of each processing unit through the pipe. A processing liquid is discharged from the nozzle onto the substrate.
- a three-way valve is provided in the processing liquid supply module.
- a processing liquid supply pipe and a cleaning liquid supply pipe are connected to the three-way valve.
- the three-way valve is switched so that the processing liquid supplied from the processing liquid supply pipe is supplied to the processing unit.
- the three-way valve is switched so that the cleaning liquid supplied from the cleaning liquid supply pipe is supplied to the processing unit.
- An object of the present invention is to provide a substrate processing system and a pipe cleaning method capable of shortening a cleaning time when a pipe is cleaned using a plurality of cleaning liquids.
- a substrate processing system includes a substrate processing apparatus that performs processing on a substrate, a processing liquid supply unit that supplies a processing liquid to the substrate processing apparatus through a pipe, and a cleaning unit.
- the unit includes a processing liquid tank that stores a processing liquid when the substrate is processed, and the substrate processing apparatus includes a processing unit that supplies the processing liquid to the substrate when the substrate is processed.
- the processing liquid tank and the processing unit are piped.
- the cleaning unit supplies the first cleaning liquid to the processing liquid tank of the processing liquid supply unit and then prepares the second cleaning liquid and supplies the prepared second cleaning liquid to the processing liquid tank when the pipe is cleaned.
- the processing liquid supply unit is configured to store the first cleaning liquid supplied from the cleaning unit in the processing liquid tank at the time of cleaning the pipe, and then the first cleaning in the processing liquid tank. Is supplied to the processing unit through the pipe, the second cleaning liquid supplied from the cleaning unit is stored in the processing liquid tank, and then the second cleaning liquid in the processing liquid tank is supplied to the processing unit through the pipe.
- the cleaning unit is configured to prepare the second cleaning liquid in parallel with the cleaning of the pipe with the first cleaning liquid.
- the processing liquid is stored in the processing liquid tank of the processing liquid supply unit when the substrate is processed.
- the processing liquid stored in the processing liquid tank is supplied to the substrate processing apparatus through the piping.
- the supplied processing liquid is supplied to the substrate by the processing unit, and the substrate is processed.
- the first cleaning liquid is supplied from the cleaning unit to the processing liquid tank of the processing liquid supply unit.
- the processing liquid supply unit after the first cleaning liquid supplied from the cleaning unit is stored in the processing liquid tank, the first cleaning liquid in the processing liquid tank is supplied to the processing unit through a pipe. Thereby, the piping is cleaned with the first cleaning liquid.
- the second cleaning liquid is prepared in parallel with the cleaning of the pipe with the first cleaning liquid.
- the prepared second cleaning liquid is supplied to the processing liquid tank of the processing liquid supply unit.
- the processing liquid supply unit after the second cleaning liquid supplied from the cleaning unit is stored in the processing liquid tank, the second cleaning liquid in the processing liquid tank is supplied to the processing unit through a pipe. Thereby, the piping is cleaned with the second cleaning liquid.
- the pipe cleaning with the first cleaning liquid and the preparation of the second cleaning liquid are performed in parallel, the time required for cleaning the pipe with the first cleaning liquid and the second cleaning liquid can be shortened. As a result, it is possible to shorten the cleaning time when the pipe is cleaned using a plurality of cleaning liquids.
- the substrate processing system further includes a supply path for supplying the first cleaning liquid and the second cleaning liquid from the cleaning unit to the processing liquid tank, and an open / close device that opens and closes the supply path.
- the supply path may be opened when the first cleaning liquid is supplied to the processing liquid tank, and the supply path may be closed after the first cleaning liquid is supplied to the processing liquid tank.
- the cleaning unit and the processing liquid tank are separated from each other. Therefore, the preparation of the second cleaning liquid can be started in the cleaning unit immediately after the supply of the first cleaning liquid from the cleaning unit to the processing liquid tank. Thereby, it becomes possible to further reduce the cleaning time when the pipe is cleaned using a plurality of cleaning liquids.
- the substrate processing system may further include an inert gas supply unit that supplies an inert gas into the supply path and the cleaning unit after the piping is cleaned with the second cleaning liquid.
- the cleaning unit may be provided so that it can be connected to and disconnected from the processing liquid supply unit.
- the cleaning unit can be connected to the processing liquid supply unit when the pipe is cleaned, and the cleaning unit can be disconnected from the processing liquid supply unit after the pipe is cleaned. Therefore, by sequentially connecting the cleaning units to the plurality of processing liquid supply units, it is possible to sequentially clean the piping in the plurality of processing liquid supply units and the plurality of substrate processing apparatuses. Further, since the cleaning unit can be separated during the processing of the substrate, an increase in the size of the substrate processing system is suppressed.
- the processing liquid supply unit may include a plurality of processing liquid tanks, and the cleaning unit may be configured to be connectable to the plurality of processing liquid tanks.
- a plurality of pipes connecting the plurality of processing liquid tanks and the substrate processing apparatus can be cleaned by a single cleaning unit.
- the processing liquid supply unit further includes a circulation path for circulating the first cleaning liquid in the processing liquid tank through the filter, and the cleaning unit prepares the second cleaning liquid in parallel with the circulation of the first cleaning liquid through the circulation path. May be.
- the second cleaning liquid is prepared in parallel with the circulation of the first cleaning liquid through the circulation path and the cleaning of the pipe with the first cleaning liquid. Therefore, even when the preparation of the second cleaning liquid requires a relatively long time, an increase in the time required for cleaning the pipe with the first cleaning liquid and the second cleaning liquid is suppressed.
- the substrate processing system is configured to supply gas to the pipe in at least one of a first period in which the first cleaning liquid is supplied to the pipe and a second period in which the second cleaning liquid is supplied to the pipe.
- the gas supply system may be further provided.
- the piping can be cleaned sufficiently sufficiently by the action of the gas continuously supplied to the first cleaning liquid or the second cleaning liquid.
- the gas supply system is configured to continuously supply an amount of gas equal to or greater than the supply amount of the first cleaning liquid per unit time to the first cleaning liquid supplied to the pipe in the first period. May be.
- the pipe can be cleaned sufficiently cleanly by the action of the gas continuously supplied to the first cleaning liquid.
- the gas supply system is configured to continuously supply an amount of gas equal to or greater than the supply amount of the second cleaning liquid per unit time to the second cleaning liquid supplied to the pipe in the second period. May be.
- the pipe can be cleaned sufficiently cleanly by the action of the gas continuously supplied to the second cleaning liquid.
- the pipe constitutes a circulation path for returning the processing liquid sent from the processing liquid tank to the processing liquid tank, and a discharge path for supplying the processing liquid from the circulation path to the processing unit, and the gas supply system is at least one of In this period, the gas may be supplied to the circulation path.
- the flow rate of the first cleaning liquid or the second cleaning liquid circulating in the circulation path can be increased by the action of the gas.
- the discharge path can be effectively cleaned.
- the substrate processing apparatus includes a processing chamber and a nozzle that discharges the processing liquid supplied from the circulation path through the discharge path to the substrate in the processing chamber.
- a valve is provided in the discharge path, and the valve opens intermittently. Accordingly, the cleaning liquid circulating in the circulation path may be intermittently discharged from the nozzle.
- the substrate processing apparatus includes a plurality of processing chambers and a plurality of nozzles respectively provided in the plurality of processing chambers, and the piping configures a plurality of discharge paths, and a plurality of valves are provided in the plurality of discharge paths, respectively.
- the plurality of valves may be opened at different timings in at least one period.
- the gas supply system continuously supplies a larger amount of gas than the amount of the first cleaning liquid or the second cleaning liquid supplied per unit time in at least one period so that the gas is discharged from the plurality of nozzles. May be supplied.
- the gas supply system supplies the gas in the same direction as the flow direction of the first cleaning liquid or the second cleaning liquid to the first cleaning liquid or the second cleaning liquid circulating in the circulation path in at least one period.
- the conduit may have an inner diameter that is smaller than the inner diameter of the circulation path.
- the gas can be supplied to the first cleaning liquid or the second cleaning liquid circulating in the circulation path without causing backflow and pressure loss.
- the gas can be supplied to the first cleaning liquid or the second cleaning liquid circulating in the circulation path without causing backflow and pressure loss.
- it is possible to increase the circulation rate of the first cleaning liquid or the second cleaning liquid that circulates in the circulation path.
- a pipe cleaning method is a pipe cleaning method for cleaning pipes in a substrate processing apparatus and a processing liquid supply unit, wherein the processing liquid supply unit is a processing liquid supply unit when processing a substrate.
- the processing liquid is supplied from the processing liquid tank to the processing unit of the substrate processing apparatus through the pipe, and the pipe cleaning method is configured to supply the first cleaning liquid from the cleaning unit to the processing liquid tank of the processing liquid supply unit when cleaning the pipe.
- a step of supplying, a step of cleaning the pipe by supplying the first cleaning liquid from the processing liquid tank to the processing unit of the substrate processing apparatus through the pipe after the supply of the first cleaning liquid to the processing liquid tank, and a pipe using the first cleaning liquid The step of preparing the second cleaning liquid in the cleaning unit in parallel with the cleaning of the pipe, and the cleaning unit after the pipe cleaning with the first cleaning liquid. Supplying the second cleaning liquid from the processing liquid tank to the processing liquid tank and cleaning the pipe by supplying the second cleaning liquid from the processing liquid tank through the pipe to the processing unit after the second cleaning liquid is supplied to the processing liquid tank. Is included.
- the pipe cleaning method since the pipe cleaning with the first cleaning liquid and the preparation of the second cleaning liquid are performed in parallel, the cleaning time when shortening the time required for cleaning the pipe with the first cleaning liquid and the second cleaning liquid is reduced. Can be shortened. As a result, it is possible to shorten the cleaning time when the pipe is cleaned using a plurality of cleaning liquids.
- FIG. 1 is a schematic diagram showing a configuration of a substrate processing system according to a first embodiment of the present invention.
- FIG. 2 is a flowchart showing a pipe cleaning operation under the control of the control unit of FIG.
- FIG. 3 is a schematic diagram showing a pipe cleaning operation of the substrate processing system in each step of FIG.
- FIG. 4 is a schematic diagram showing a pipe cleaning operation of the substrate processing system in each step of FIG.
- FIG. 5 is a schematic diagram showing a pipe cleaning operation of the substrate processing system in each step of FIG.
- FIG. 6 is a schematic diagram showing a pipe cleaning operation of the substrate processing system in each step of FIG.
- FIG. 7 is a schematic diagram showing a pipe cleaning operation of the substrate processing system in each step of FIG. FIG.
- FIG. 8 is a schematic diagram showing the pipe cleaning operation of the substrate processing system in each step of FIG.
- FIG. 9 is a schematic diagram showing a pipe cleaning operation of the substrate processing system in each step of FIG.
- FIG. 10 is a schematic diagram showing a pipe cleaning operation of the substrate processing system in each step of FIG.
- FIG. 11 is a schematic diagram showing a pipe cleaning operation of the substrate processing system in each step of FIG.
- FIG. 12 is a schematic diagram showing a configuration of a substrate processing system according to the second embodiment of the present invention.
- FIG. 13 is a schematic diagram showing the configuration of the cleaning unit according to the third embodiment of the present invention.
- FIG. 14 is a schematic diagram showing a configuration of a substrate processing system including another example of the cleaning unit.
- FIG. 15 is an explanatory view showing a state in which nitrogen gas is mixed in the circulating cleaning liquid at the connection portion.
- FIG. 16 is a schematic diagram showing a state of the cleaning liquid flowing through the pipe when nitrogen gas is not supplied.
- FIG. 17 is a schematic diagram showing a state of the cleaning liquid flowing through the pipe when nitrogen gas is supplied.
- FIG. 18 is a flowchart showing a cleaning procedure for piping of a substrate processing system using the cleaning unit and the substrate processing apparatus of FIG.
- FIG. 19 is a schematic diagram showing the configuration of the main part of the processing liquid supply unit in the fourth embodiment.
- FIG. 20 is a schematic diagram showing the configuration of the main part of the processing liquid supply unit in the fifth embodiment.
- a substrate means a semiconductor wafer, a glass substrate for a photomask, a glass substrate for a liquid crystal display device, a glass substrate for a plasma display, an optical disk substrate, a magnetic disk substrate, a magneto-optical disk substrate, or the like.
- FIG. 1 is a schematic diagram showing a configuration of a substrate processing system according to a first embodiment of the present invention.
- the substrate processing system 100 in FIG. 1 includes a portable cleaning unit 1, a plurality of processing liquid supply units 2, and a substrate processing apparatus 3.
- the substrate processing apparatus 3 includes a plurality of processing units (processing chambers) 31. In FIG. 1, two processing units 31 are illustrated. In each processing unit 31, processing using a processing liquid is performed on the substrate W.
- the cleaning unit 1 includes a cleaning liquid tank 11, weighing tanks 12 and 13, a pump 14, a filter 15, a specific resistance meter 16, and a control unit 17.
- a liquid circulation pipe P ⁇ b> 1 is connected between the liquid inlet and the liquid outlet of the cleaning liquid tank 11.
- Valve V1, pump 14, and filter 15 are inserted in piping P1.
- a pipe P2 is provided so as to branch from the pipe P1.
- the pipe P2 is connected to the connection portion C1 of the processing liquid supply unit 2.
- the weighing tanks 12 and 13 are connected to the liquid inlet of the cleaning liquid tank 11 through the pipes P3 and P4, respectively. Valves V2 and V3 are inserted in the pipes P3 and P4, respectively. Chemical liquid supply units 41 and 42 are connected to the weighing tanks 12 and 13 through pipes P5 and P6, respectively. A pure water supply source 43 is connected to the liquid inlet of the cleaning liquid tank 11 through the pipe P7. A valve V4 is inserted in the pipe P7.
- the first chemical solution is supplied from the chemical solution supply unit 41 to the weighing tank 12, and the second chemical solution is supplied from the chemical solution supply unit 42 to the weighing tank 13.
- the first chemical solution is, for example, ammonia
- the second chemical solution is, for example, hydrogen peroxide solution.
- SC1 a mixed liquid of ammonia and hydrogen peroxide
- SC2 a mixed solution of hydrochloric acid and hydrogen peroxide solution
- pure water is supplied from the pure water supply source 43 to the cleaning liquid tank 11.
- pure water is used as the cleaning liquid.
- a rinse liquid other than pure water may be used as the cleaning liquid.
- the rinse liquid for example, carbonated water, ozone water, magnetic water, reduced water (hydrogen water) or ionic water, or an organic solvent such as IPA (isopropyl alcohol) may be used.
- the liquid outlet of the cleaning liquid tank 11 is connected to the resistivity meter 16 through the pipe P8.
- a valve V5 is inserted in the pipe P8.
- a pipe P9 is connected to the specific resistance meter 16.
- a valve V6 is inserted in the pipe P9.
- the pipe P9 is connected to the connection portion C2 of the processing liquid supply unit 2.
- the specific resistance meter 16 is connected to a drain pipe P10.
- the control unit 17 controls operations of the cleaning unit 1 such as opening and closing of the valves V1 to V6 and operation of the pump 14.
- the processing liquid supply unit 2 includes one or a plurality of processing liquid tanks 21 and a control unit 24.
- one processing liquid tank 21 is provided.
- a pipe P11 is connected between the liquid inlet of the processing liquid tank 21 and the connection portion C1. Valves V7 and V8 are inserted in the pipe P11.
- a pipe P12 is connected to the pipe P11 between the valves V7 and V8.
- a valve V9 is inserted in the pipe P12. Nitrogen gas can be supplied to the pipe P11 through the pipe P12.
- a liquid circulation pipe P13 is connected between the liquid inlet and the liquid outlet of the treatment liquid tank 21.
- a valve V10, a pump 22 and a filter 23 are inserted in the pipe P13.
- a pipe P14 is provided to branch from the pipe P13.
- a valve V11 is inserted in the pipe P14.
- the pipe P14 is connected to the connection part C2.
- a pipe P15 is provided so as to branch from the pipe P13.
- a valve V12 is inserted in the pipe P15.
- a plurality of pipes P16 are branched from the pipe P15.
- the processing liquid is stored in the processing liquid tank 21 of the processing liquid supply unit 2.
- a chemical liquid or a rinse liquid is used as the treatment liquid.
- the chemical solution include aqueous solutions such as buffered hydrofluoric acid (BHF), dilute hydrofluoric acid (DHF), hydrofluoric acid (hydrogen fluoride water: HF), hydrochloric acid, sulfuric acid, nitric acid, phosphoric acid, acetic acid, oxalic acid, or aqueous ammonia. Or a mixed solution thereof.
- BHF buffered hydrofluoric acid
- DHF dilute hydrofluoric acid
- HF hydrofluoric acid
- hydrochloric acid sulfuric acid, nitric acid, phosphoric acid, acetic acid, oxalic acid, or aqueous ammonia.
- the processing solution may be a photoresist solution or a developing solution.
- the control unit 24 controls the operation of the processing liquid supply unit 2 such as the opening and closing of the valves V7 to V12 and the operation of the pump 22.
- the substrate processing apparatus 3 includes a plurality of processing units 31. Each processing unit 31 includes a substrate holder 32 that holds the substrate W, a cup 33, and a nozzle 34. The nozzle 34 is connected to the pipe P16. A valve V13 is inserted in each pipe P16. A pipe P ⁇ b> 17 is connected to the discharge port of each processing unit 31. A valve V14 is inserted in the pipe P17. The pipe P17 is connected to the specific resistance meter 16 of the cleaning unit 1.
- the control unit 35 controls the operation of the substrate processing apparatus 3 such as opening and closing of the valves V13 and V14.
- the cleaning unit 1 can be connected to and disconnected from the processing liquid supply unit 2 at the connection portions C1 and C2. During the pipe cleaning operation described below, the cleaning unit 1 is connected to the processing liquid supply unit 2. Further, when the substrate W is processed, the cleaning unit 1 is separated from the processing liquid supply unit 2.
- FIG. 2 is a flowchart showing a pipe cleaning operation under the control of the control units 17, 24, and 35 in FIG. 3 to 11 are schematic views showing the pipe cleaning operation of the substrate processing system 100 in each step of FIG.
- the processing liquid supply unit 2 and the piping of the substrate processing apparatus 3 are cleaned using the first cleaning liquid, the second cleaning liquid, and the third cleaning liquid
- the first cleaning liquid is SC1
- the second cleaning liquid is pure water
- the third cleaning liquid is also pure water.
- the cleaning unit 1 prepares the first cleaning liquid under the control of the control unit 17 (step S1 in FIG. 2).
- the control unit 17 opens the valves V2 and V3 in FIG.
- ammonia is supplied from the weighing tank 12 to the cleaning liquid tank 11 as the first chemical liquid
- hydrogen peroxide water is supplied from the weighing tank 13 as the second chemical liquid to the cleaning liquid tank 11.
- ammonia and hydrogen peroxide solution are mixed.
- SC1 is generated as the first cleaning liquid.
- the control unit 17 closes the valves V2 and V3, opens the valve V1 in FIG.
- the first cleaning liquid circulates in the pipe P1 as indicated by the thick solid arrow in FIG.
- particles in the cleaning liquid tank 11 and particles contained in the first cleaning liquid are removed by the filter 15.
- the first cleaning liquid is supplied from the cleaning liquid tank 11 to the processing liquid tank 21 under the control of the control unit 24 (step S2).
- the control unit 17 closes the valve V1 of FIG. 1 to stop the return of the first cleaning liquid to the cleaning liquid tank 11, and then the control unit 24 opens the valves V7 and V8 of FIG.
- the first cleaning liquid is supplied from the pipe P1 to the processing liquid tank 21 through the pipe P11.
- step S3 circulation of the first cleaning liquid and preparation for cleaning are performed under the control of the control unit 24 (step S3).
- the control unit 24 closes the valves V7 and V8 in FIG. 1, opens the valve V10, and operates the pump 22.
- the first cleaning liquid circulates through the pipe P ⁇ b> 13, and particles in the processing liquid tank 21 and particles contained in the first cleaning liquid are removed by the filter 23.
- step S4 pipe cleaning is performed under the control of the control unit 24 and the control unit 35 (step S4).
- the control unit 24 opens the valve V12 in FIG. 1, and the control unit 35 opens the valves V13 and V14 in FIG.
- the first cleaning liquid is supplied from the pipe P13 through the pipes P15 and P16 and the nozzle 34 into each processing unit 31.
- the first cleaning liquid in each processing unit 31 is discharged through the pipings P17 and P10. Accordingly, the pipes P13, P15 to P17, the valves V12 to V14, and the nozzle 34 are cleaned with the first cleaning liquid.
- the control unit 24 closes the valves V10 and V12, and the control unit 35 closes the valves V13 and V14.
- the second cleaning liquid is prepared under the control of the control unit 17 (step S5).
- the control unit 17 opens the valves V1, V4, and V5 shown in FIG.
- pure water is supplied as the second cleaning liquid from the pure water supply source 43 to the cleaning liquid tank 11 through the pipe P7, and FIGS.
- the first cleaning liquid in the cleaning liquid tank 11 is discharged through the pipes P8 and P10. Further, the second cleaning liquid circulates through the pipe P1.
- the control unit 17 measures the specific resistance of the second cleaning liquid using the specific resistance meter 16. When the specific resistance reaches a predetermined value, the control unit 17 closes the valve V ⁇ b> 5 of FIG. 1 and stores the second cleaning liquid in the cleaning liquid tank 11. Thereafter, the control unit 17 closes the valve V4 in FIG.
- the second cleaning liquid is supplied from the cleaning liquid tank 11 to the processing liquid tank 21 under the control of the control unit 24 (step S6).
- the control unit 17 closes the valve V1 in FIG. 1 to stop returning the second cleaning liquid to the cleaning liquid tank 11, and then the control unit 24 opens the valves V7 and V8 in FIG.
- the second cleaning liquid is supplied from the pipe P1 to the processing liquid tank 21 through the pipe P11 as indicated by a thick dashed line arrow in FIG.
- the control unit 24 opens the valve V10. Accordingly, the second cleaning liquid circulates through the pipe P13, and the first cleaning liquid in the cleaning liquid tank 11, the pipe P13, the filter 15, and the pump 14 is washed away with the second cleaning liquid.
- step S7 pipe cleaning is performed under the control of the control unit 24 and the control unit 35 (step S7).
- the control unit 24 opens the valve V12 in FIG. 1
- the control unit 35 opens the valves V13 and V14 in FIG.
- the second cleaning liquid is supplied from the pipe P13 through the pipes P15 and P16 and the nozzle 34 into each processing unit 31.
- the second cleaning liquid in each processing unit 31 is discharged through the pipes P17 and P10. Accordingly, the pipes P13, P15 to P17, the valves V12 to V14, and the nozzle 34 are cleaned with the second cleaning liquid.
- step S8 it is determined whether or not the specific resistance of the second cleaning liquid is a predetermined value under the control of the control unit 17 (step S8).
- the control unit 17 measures the specific resistance of the second cleaning liquid using the specific resistance meter 16. If the specific resistance is not a predetermined value, the process returns to step S6, and the second cleaning liquid is supplied from the cleaning liquid tank 11 to the processing liquid tank 21 and the pipe is cleaned with the second cleaning liquid.
- the control unit 24 closes the valves V10 and V12 in FIG. 1, and the control unit 35 closes the valves V13 and V14.
- the third cleaning liquid is prepared under the control of the control unit 17 (step S9).
- the control unit 17 opens the valves V1, V4, and V5 shown in FIG.
- pure water is supplied as the third cleaning liquid from the pure water supply source 43 to the cleaning liquid tank 11 through the pipe P7, and in FIG.
- the second cleaning liquid in the cleaning liquid tank 11 is discharged through the pipes P8 and P10.
- the third cleaning liquid circulates through the pipe P1.
- the second cleaning liquid in the cleaning liquid tank 11, the pipe P1, the pump 14, and the filter 15 is replaced with the third cleaning liquid.
- control unit 17 measures the specific resistance of the third cleaning liquid using the specific resistance meter 16. When the specific resistance reaches a predetermined value, the control unit 17 closes the valve V ⁇ b> 5 of FIG. 1 and stores the third cleaning liquid in the cleaning liquid tank 11. Thereafter, the control unit 17 closes the valve V4.
- the third cleaning liquid is supplied from the cleaning liquid tank 11 to the processing liquid tank 21 and the processing liquid tank 21 is cleaned under the control of the control unit 24 (step S10).
- the control unit 17 closes the valve V1 in FIG. 1 to stop the return of the third cleaning liquid to the cleaning liquid tank 11, and then the control unit 24 opens the valves V7 and V8 in FIG.
- the third cleaning liquid is supplied from the pipe P1 to the processing liquid tank 21 through the pipe P11.
- the control unit 24 opens the valve V10 of FIG. Accordingly, the third cleaning liquid circulates through the pipe P13, and the second cleaning liquid of the cleaning liquid tank 11, the pipe P13, the filter 15, and the pump 14 is washed away with the third cleaning liquid.
- step S11 it is determined whether or not the specific resistance of the third cleaning liquid is a predetermined value under the control of the control unit 17 and the control unit 24 (step S11).
- the control unit 17 opens the valve V6 in FIG. 1, and the control unit 24 opens the valve V11 in FIG.
- the controller 17 measures the specific resistance of the third cleaning liquid using the specific resistance meter 16. If the specific resistance is not a predetermined value, the process returns to step S10, and the third cleaning liquid is supplied from the cleaning liquid tank 11 to the processing liquid tank 21 and the third cleaning liquid is circulated.
- the third cleaning liquid in the processing liquid tank 21 and the pipes P13, P14, P9, and P10 is discharged under the control of the control unit 24 and the control unit 17 (step S12).
- the control unit 24 closes the valves V6, V10, V11 in FIG.
- the inside of the processing liquid tank 21 can be sufficiently cleaned by the above steps S9 to S12.
- step S13 nitrogen gas is sealed under the control of the control unit 24 (step S13).
- the control unit 24 opens the valves V7 and V9, and the control unit 17 opens the valve V1.
- nitrogen gas is sealed in the pipes P11, P2 and P1 and the cleaning liquid tank 11 as indicated by thick broken arrows in FIG.
- the cleaning unit 1 prepares the second cleaning liquid (step S5) in parallel with the cleaning of the pipes P13, P15 to P17 with the first cleaning liquid (step S4). )It can be performed.
- the cleaning unit 1 can prepare the third cleaning liquid (step S9). Therefore, the time required for cleaning the pipes P13, P15 to P17 with the first cleaning liquid and the second cleaning liquid can be shortened. As a result, the pipes P13, P15 to P17 can be cleaned in a short time using a plurality of cleaning liquids.
- the cleaning unit 1 can prepare the third cleaning liquid (step S9).
- the time required for cleaning the pipes P13, P15 to P17 with the first cleaning liquid and the second cleaning liquid can be further shortened.
- valves V7 and V8 inserted in the pipe P11 are closed after the supply of the first cleaning liquid from the cleaning unit 1 to the processing liquid tank 21, the supply of the first cleaning liquid from the cleaning unit 1 to the processing liquid tank 21 is closed. Immediately after the end, preparation of the second cleaning liquid can be started in the cleaning unit 1. Accordingly, the pipes P13, P15 to P17 can be cleaned with the first cleaning liquid and the second cleaning liquid in a shorter time.
- the cleaning unit 1 can be connected to and disconnected from the processing liquid supply unit 2, the cleaning unit 1 is disconnected from the processing liquid supply unit 2 after the cleaning of the pipes P13 and P15 to P17, and another processing liquid supply is performed. Can be connected to unit 2. Thereby, the piping of the plurality of processing liquid supply units 2 and the plurality of substrate processing apparatuses 3 can be sequentially cleaned by the single cleaning unit 1. Moreover, since the cleaning unit 1 can be separated from the processing liquid supply unit 2 when the substrate processing apparatus 3 processes the substrate W, an increase in the size of the substrate processing system 100 during operation of the substrate processing apparatus 3 is suppressed.
- FIG. 12 is a schematic diagram showing a configuration of a substrate processing system according to a second embodiment of the present invention.
- the configuration and operation of the substrate processing system 100 according to the second embodiment are the same as the configuration and operation of the substrate processing system 100 according to the first embodiment except for the following points.
- the processing liquid supply unit 2 is provided with a processing liquid tank 21a in addition to the processing liquid tank 21 of FIG.
- a pipe P11a is provided so as to branch from the part of the pipe P11 between the valve V7 and the connection portion C1.
- the pipe P11a is connected to the liquid inlet of the processing liquid tank 21a. Valves V7a and V8a are inserted in the pipe P11a.
- a pipe P12a is provided so as to branch from a portion of the pipe P12 on the upstream side of the valve V9.
- a pipe P12a is connected to the pipe P11a between the valves V7a and V8a.
- a valve V9a is inserted in the pipe P12a. Nitrogen gas can be supplied to the pipe P11a through the pipe P12a.
- a pipe P13a for circulating liquid is connected between the liquid inlet and the liquid outlet of the treatment liquid tank 21a.
- a valve V10a, a pump 22a, and a filter 23a are inserted in the pipe P13a.
- a pipe P14a is provided so as to branch from the pipe P13a.
- a valve V11a is inserted in the pipe P14a.
- the pipe P14a is connected to the connection part C2.
- a pipe P15a is provided so as to branch from the pipe P13a.
- a valve V12a is inserted in the pipe P15a.
- a plurality of pipes P16a are branched from the pipe P15a.
- the control unit 24 controls operations of the processing liquid supply unit 2 such as opening and closing of the valves V7 to V12 and V7a to V12a and operation of the pumps 22 and 22a.
- the processing liquid is stored in the processing liquid tanks 21 and 21a.
- Different types of processing liquids may be stored in the processing liquid tanks 21 and 21a.
- treatment liquids having the same components and different concentrations may be stored in the treatment liquid tanks 21 and 21a.
- Each processing unit 31 of the substrate processing apparatus 3 includes a nozzle 34 a in addition to the substrate holding part 32, the cup 33 and the nozzle 34.
- the nozzle 34a is connected to the pipe P16a.
- a valve V13a is inserted in each pipe P16a.
- the control unit 35 controls operations of the substrate processing apparatus 3 such as opening and closing of the valves V13, V13a, and V14.
- the cleaning liquid is simultaneously supplied from the cleaning unit 1 to the two processing liquid tanks 21 and 21a.
- the valves V10, V10a, V12, and V12a are opened while the cleaning liquid is stored in the two processing liquid tanks 21 and 21a
- the cleaning liquid in the processing liquid tanks 21 and 21a is piped P15, P15a, P16, and P16a. And it supplies in each processing unit 31 through the nozzles 34 and 34a. Accordingly, the two processing liquid tanks 21 and 21a and the pipes P11 to P16 and P11a to P16a of the processing liquid supply unit 2 can be cleaned at the same time.
- cleaning liquids can be supplied from the cleaning unit 1 to the processing liquid tanks 21 and 21a of the processing liquid supply unit 2, respectively.
- the cleaning liquid can be supplied from the cleaning unit 1 to the processing liquid tank 21 by opening the valves V7 and V8. Further, the cleaning liquid can be supplied from the cleaning unit 1 to the processing liquid tank 21a by opening the valves V7a and V8a.
- SC1 is supplied as the first cleaning liquid to the processing liquid tank 21
- pure water is supplied as the second cleaning liquid to the processing liquid tank 21.
- SC2 is supplied as the first cleaning liquid to the processing liquid tank 21a, and then pure water is supplied as the second cleaning liquid to the processing liquid tank 21a.
- pure water is prepared in the cleaning unit 1 in parallel with the pipe cleaning by SC1
- SC2 is prepared in the cleaning unit 1 in parallel with pipe cleaning by pure water
- pure water is supplied in parallel with pipe cleaning by SC2.
- a substrate processing system according to a third embodiment has the same configuration as the substrate processing system 100 according to the first embodiment except for the configuration of the cleaning unit 1.
- FIG. 13 is a schematic diagram showing the configuration of the main part of the cleaning unit according to the third embodiment of the present invention.
- the cleaning unit 1 in the present embodiment includes a cleaning liquid tank 11 a in addition to the cleaning liquid tank 11.
- a pipe P1a for circulating liquid is connected to the cleaning liquid tank 11a.
- a valve V1a, a pump 14a, and a filter 15a are inserted in the pipe P1a.
- a pipe P2a is provided so as to branch from the pipe P1a.
- the pipe P2a is connected to the pipe P2.
- different types of cleaning liquids or cleaning liquids having different concentrations can be stored in the cleaning liquid tanks 11 and 11a.
- SC1 is used as the first cleaning liquid
- pure water is used as the second cleaning liquid
- SC2 is used as the third cleaning liquid
- pure water is used as the fourth cleaning liquid.
- the second cleaning liquid can be prepared in the cleaning liquid tank 11 in parallel with the pipe cleaning with the first cleaning liquid.
- the fourth cleaning liquid can be prepared in the cleaning liquid tank 11a in parallel with the pipe cleaning with the third cleaning liquid. Therefore, it is possible to clean the piping in a short time using a plurality of cleaning liquids.
- FIG. 14 is a schematic diagram showing a configuration of a substrate processing system including another example of the cleaning unit.
- the substrate processing system 100a includes a substrate processing apparatus 3a, a first processing liquid tank T21, a second processing liquid tank T22, a processing liquid supply path (processing liquid supply mechanism), and a cleaning unit 1A.
- the cleaning unit 1A of the substrate processing system 100a has a configuration that can be attached to and detached from the substrate processing apparatus 3a. However, since the cleaning unit 1A may be included in the substrate processing apparatus 3a, in FIG. Piping is shown as an integral part.
- the substrate processing apparatus 3a may include a first processing liquid tank T21, a second processing liquid tank T22, and a processing liquid supply path.
- the substrate processing apparatus 3a includes first and second processing chambers (processing units) U11 and U12.
- a processing liquid is supplied to a substrate such as a semiconductor wafer that is held and rotated by a spin chuck (substrate holding unit) (not shown).
- the first processing liquid tank T21 stores an acidic processing liquid such as HF, for example.
- the second processing liquid tank T22 stores an alkaline processing liquid such as SC1.
- the processing liquid supply path supplies the processing liquid from the first processing liquid tank T21 and the second processing liquid tank T22 to the first and second processing chambers U11 and U12.
- the acidic treatment liquid circulation path 101 is connected to the first treatment liquid tank T21.
- the circulation path 101 is provided with a valve V51, a pump P52, a filter F53, and a valve V57.
- the acidic processing liquid is sent from the first processing liquid tank T21 and then returned to the first processing liquid tank T21 through the circulation path 101.
- the circulation path 101 is connected to an acidic process liquid discharge path 103 and an acidic process liquid discharge path 104.
- the discharge path 103 is connected to the nozzle N13 in the first processing chamber U11 through valves V61 and V66.
- the discharge path 104 is connected to the nozzle N15 in the second processing chamber U12 through valves V62 and V68.
- the alkaline treatment liquid circulation path 102 is connected to the second treatment liquid tank T22.
- the circulation path 102 is provided with a valve V54, a pump P55, a filter F56, and a valve V58.
- the alkaline processing liquid is sent from the second processing liquid tank T22 and then returned to the second processing liquid tank T22 through the circulation path 102.
- the circulation path 102 is connected to an alkaline processing liquid discharge path 105 and an alkaline processing liquid discharge path 106.
- the discharge path 105 is connected to the nozzle N14 in the first processing chamber U11 through valves V63 and V67.
- the discharge path 106 is connected to the nozzle N16 in the second processing chamber U12 through valves V64 and V69.
- the first treatment liquid tank T21 is connected to the vent pipe 111 through the valve V46.
- the second treatment liquid tank T22 is connected to the vent pipe 111 through the valve V47.
- the vent pipe 111 is connected to the exhaust part E48.
- valve V46 is normally closed.
- the valve V46 is opened and a part of the gas in the first processing liquid tank T21 passes through the vent piping 111. It is discharged to the outside from the exhaust part E48.
- valve V47 is normally closed.
- the valve V47 is opened and a part of the gas in the second processing liquid tank T22 passes through the vent piping 111. It is discharged to the outside from the exhaust part E48.
- the acidic processing liquid in the first processing liquid tank T21 circulates in the circulation path 101 by driving the pump P52 with the valve V51 and the valve V57 being opened. That is, the acidic processing liquid stored in the first processing liquid tank T21 is sent from the first processing liquid tank T21 by the pump P52, then moves in the circulation path 101, and is returned to the first processing liquid tank T21. It is. In this state, when the valve V61 and the valve V66 are opened, the acidic processing liquid circulating in the circulation path 101 rotates in the first processing chamber U11 from the nozzle N13 through the discharge path 103. Supplied to the substrate.
- the acidic processing liquid is supplied from the nozzle N15 through the discharge path 104 to the substrate that rotates in the second processing chamber U12.
- These acidic processing liquids are recovered from the first processing chamber U11 or the second processing chamber U12 to the first processing liquid tank T21 through a recovery path (not shown).
- the acidic processing liquid used for processing the substrate may be discarded as it is.
- the alkaline processing liquid in the second processing liquid tank T22 circulates in the circulation path 102. That is, the alkaline processing liquid stored in the second processing liquid tank T22 is sent from the second processing liquid tank T22 by the pump P55, then moves in the circulation path 102, and is returned to the second processing liquid tank T22. It is. In this state, when the valve V63 and the valve V67 are opened, the alkaline processing liquid is supplied from the nozzle N14 to the rotating substrate in the first processing chamber U11 through the discharge path 105.
- the alkaline processing liquid is supplied from the nozzle N16 through the discharge path 106 to the substrate that rotates in the second processing chamber U12.
- These alkaline processing liquids are recovered from the first processing chamber U11 or the second processing chamber U12 to the second processing liquid tank T22 through a recovery path (not shown).
- the alkaline processing liquid used for processing the substrate may be discarded as it is.
- the processing liquid supply path includes circulation paths 101 and 102 and discharge paths 103 to 106.
- the valves V31 to V33, V42, V43, V46, V47, V51, V54, V57, V58, and V61 to V69 are open / close valves.
- the substrate processing apparatus 3a of this example has two processing chambers (first and second processing chambers U11 and U12), but the number of processing chambers is not limited to two. The number of processing chambers may be about 4 to 12. For example, if the substrate processing apparatus 3a has eight processing chambers, eight acidic processing liquid discharge paths and eight alkaline processing liquid discharge paths are required. Further, in the substrate processing system 100a of this example, the substrate is processed by two kinds of acidic and alkaline processing liquids, but a larger number of types of processing liquids may be supplied to the substrate. May be processed.
- the cleaning unit 1A of the substrate processing system 100a includes a cleaning liquid tank T11 that stores a cleaning liquid.
- the cleaning liquid in the cleaning liquid tank T11 is sent from the cleaning liquid tank T11 through the valve V33 and the pump P34, and then supplied to the first processing liquid tank T21 through the cleaning liquid supply path 107 having the valve V32 and the cleaning liquid supply having the valve V31.
- the liquid is supplied to the second processing liquid tank T22 through the path.
- the cleaning unit 1A has a supply part S41 of nitrogen gas as an inert gas.
- the supply unit S41 is connected to the circulation path 101 at the connection part C44 through the nitrogen gas supply path 109 having the valve V42. For this reason, as will be described later, nitrogen gas can be mixed into the cleaning liquid circulating through the circulation path 101 from the connection portion C44.
- the supply part S41 is connected to the circulation path 102 at the connection part C45 through the nitrogen gas supply path 110 having the valve V43. For this reason, as will be described later, nitrogen gas can be mixed into the cleaning liquid circulating in the circulation path 102 from the connection portion C45.
- the substrate processing system 100a includes a control unit CNT that integrally controls the cleaning unit 1A and the substrate processing apparatus 3a.
- the control unit CNT includes the above-described valves V31 to V33, a nitrogen gas supply unit S41, valves V42, V43, V46, V47, V51, V54, V57, V58, V61 to V64, V66 to V69, and pumps P34, P52, By controlling P55 and the like, a cleaning process for piping constituting a processing liquid supply path of the substrate processing system 100a described later is executed.
- FIG. 15 is an explanatory view showing a state in which nitrogen gas is mixed into the circulating cleaning liquid at the connecting portions C44 and C45.
- a T-shaped tube P71 having a small diameter portion and a large diameter portion is used for the connecting portions C44 and C45.
- the large diameter portion of the T-shaped pipe P71 is connected to the pipe P72 by a nut 74.
- the pipe P72 constitutes a circulation path 101 for the acidic treatment liquid or a circulation path 102 for the alkaline treatment liquid.
- the small diameter portion of the T-shaped pipe P71 is connected to the pipe P73 by a nut 74.
- the pipe P73 constitutes the nitrogen gas supply path 109 or the nitrogen gas supply path 110.
- the acidic or alkaline processing liquid that moves inside the pipe P72 (circulation paths 101 and 102) is indicated by the symbol A, and moves inside the pipe P73 (the nitrogen gas supply path 109 or the nitrogen gas supply path 110).
- the nitrogen gas to be used is indicated by the symbol B.
- the pipe P73 has a smaller inner diameter than the pipe P72.
- nitrogen gas is supplied in the same direction as the flow of the cleaning liquid circulating through the pipe P72 from the pipe P73 having an inner diameter smaller than the pipe P72 constituting the circulation path 101 or the circulation path 102. .
- the nitrogen gas B can be supplied to the cleaning liquid A circulating in the pipe P72 without causing a backflow and a pressure loss. Thereby, it becomes possible to increase the circulation speed of the cleaning liquid circulating through the pipe P72.
- the cleaning liquid tank T11 to the first processing liquid tank T21 and the first processing liquid tank T21 of the cleaning unit 1A are used.
- a necessary amount of cleaning liquid is supplied to the two processing liquid tank T22. That is, the control unit CNT opens the valve V33 and drives the pump P34 with all the valves closed.
- the control unit CNT supplies the cleaning liquid to the first processing liquid tank T21 by opening the valve V32, and supplies the cleaning liquid to the second processing liquid tank T22 by opening the valve V31.
- the control unit CNT closes the valves V31, V32, V33 and stops driving the pump P34.
- control unit CNT opens the valve V51 and the valve V57 and drives the pump P52 to circulate the cleaning liquid in the acidic treatment liquid circulation path 101. Further, the control unit CNT opens the valve V42 in a state where the cleaning liquid circulates, and supplies nitrogen gas into the cleaning liquid that circulates through the circulation path 101 from the connection part C44. As a result, the flow rate of the cleaning liquid circulating in the circulation path 101 is increased by the action of nitrogen gas. At this time, the supply amount of nitrogen gas per unit time (for example, 7 to 28 liters / minute) is equal to or higher than the supply amount of cleaning liquid supplied to the circulation path 101 per unit time (for example, 7 liters / minute). ing.
- control unit CNT opens the valve V54 and the valve V58 and drives the pump P55 to circulate the cleaning liquid in the circulation path 102 of the alkaline processing liquid. Further, the control unit CNT opens the valve V43 in a state in which the cleaning liquid circulates, and supplies nitrogen gas into the cleaning liquid that circulates through the circulation path 102 from the connection part C45. As a result, the flow rate of the cleaning liquid circulating in the circulation path 102 is increased by the action of nitrogen gas. At this time, the supply amount of nitrogen gas per unit time (for example, 7 to 28 liters / minute) is also greater than or equal to the supply amount of cleaning liquid supplied to the circulation path 102 per unit time (for example, 7 liters / minute). ing.
- FIG. 16 is a schematic diagram showing a state of the cleaning liquid flowing through the pipe P72 when nitrogen gas is not supplied.
- FIG. 17 is a schematic diagram showing the state of the cleaning liquid flowing through the pipe P72 when nitrogen gas is supplied.
- the cleaning liquid w moves at a low speed while being in close contact with the inner wall of the pipe P72. In this case, since a large physical force does not act on the particles P attached to the inner wall of the pipe P72, these particles P cannot be removed efficiently.
- connection part C44 (C45) nitrogen gas having a volume equal to or larger than the supply amount per unit time of the cleaning liquid supplied to the circulation path 101 (102) is generated in the pipe P72. Is supplied to the cleaning liquid flowing through Thereby, in the connection part C44 (C45), the cleaning liquid breaks up into a plurality of droplets d (FIG. 17) smaller than the inner diameter of the pipe P72 and accelerates greatly. As shown in FIG. 17, the plurality of droplets d move at high speed while repeatedly colliding with the inner wall of the pipe P72 downstream from the connection portion C44 (C45).
- the cleaning unit 1A of the present example the cleaning liquid is split into droplets that are smaller than the inner diameter of the pipe P72 and move at a high speed by the nitrogen gas supplied from the connection C44 and the connection C45. Therefore, a large physical force can be applied to minute particles adhering to the uneven portion or joint portion of the inner wall of the pipe P72. Thereby, the minute particles adhering in the pipe P72 can be removed with high efficiency.
- FIG. 18 is a flowchart showing a cleaning procedure for piping of the substrate processing system 100a using the cleaning unit 1A and the substrate processing apparatus 3a of FIG. A procedure for cleaning the piping of the substrate processing system 100a will be described with reference to FIGS.
- control unit CNT opens the valves V31 to V33 while the valves V51 and V54 are closed, and operates the pump P34 to supply a predetermined amount of cleaning liquid supplied from the cleaning liquid tank T11.
- the first treatment liquid tank T21 and the second treatment liquid tank T22 are stored (step S21).
- the controller CNT opens the valves V51 and V57 with the valves V61 and V62 closed, and starts the operation of the pump P52, thereby starting the circulation of the cleaning liquid in the acidic treatment liquid circulation path 101. To do. At the same time, the control unit CNT opens the valves V54 and V58 while the valves V63 and V64 are closed, and starts the operation of the pump P55, thereby starting the circulation of the cleaning liquid in the circulation path 102 of the alkaline processing liquid. (Step S22).
- the control unit CNT When the inside of the circulation path 101 is filled with the cleaning liquid, the control unit CNT continuously opens the valve V42 and starts supplying nitrogen gas to the circulation path 101. Similarly, when the inside of the circulation path 102 is filled with the cleaning liquid, the control unit CNT continuously opens the valve V43 and starts supplying nitrogen gas to the circulation path 102 (step S23). As described above, the inner walls of the circulation paths 101 and 102 start to be efficiently cleaned by the plurality of droplets of the cleaning liquid.
- the supply of nitrogen gas at the connection C44 (C45) increases the internal pressure of the nitrogen gas in the circulation path 101 (102) including the processing liquid tank T21 (T22).
- the control unit CNT opens and closes the valve V46 (V47) at an appropriate timing, excess nitrogen gas is discharged (vented) from the exhaust unit E48. Therefore, the internal pressure of the nitrogen gas in the circulation path 101 (102) is kept constant. If the internal pressure of the nitrogen gas becomes too high, it becomes difficult to supply the nitrogen gas from the connecting portions C44 and C45.
- the control unit CNT vents by controlling the valves V46 and V47 to open and close at an appropriate timing, so that nitrogen gas is continuously supplied from the connection units C44 and C45 to the circulation paths 101 and 102. Can do.
- the control unit CNT discharges the cleaning liquid from the nozzle N13 by opening the valves V61 and V66 (step S24). Accordingly, a first discharge path cleaning operation is performed to clean the acidic process liquid discharge path 103 connected to the nozzle N13 in the first processing chamber U11.
- control unit CNT causes the cleaning liquid to be discharged from the nozzle N15 by opening the valves V62 and V68 (step S25). Accordingly, a second discharge path cleaning operation for cleaning the acidic process liquid discharge path 104 connected to the nozzle N15 in the second processing chamber U12 is executed.
- valves V61, V62, V66, and V68 are continuously opened, the cleaning liquid and the nitrogen gas are continuously discharged from the nozzle N13 and the nozzle N15. In this case, the internal pressure of the nitrogen gas in the circulation path 101 and the discharge paths 103 and 104 may decrease.
- valve V61 (V66) and the valve V62 (V68) are intermittently opened and closed, if the discharge timing of the cleaning liquid or the like from the nozzle N13 and the nozzle N15 overlaps, the circulation path 101 and the discharge path 103, There is a possibility that the internal pressure of the nitrogen gas in 104 will decrease. In this case, since the flow velocity of the cleaning liquid droplets flowing through the circulation path 101 and the discharge paths 103 and 104 is lowered, a sufficient cleaning effect cannot be obtained. This phenomenon becomes more prominent as the number of discharge paths 103 and 104 connected to the same circulation path 101 increases.
- valves V61, V62, V66, and V68 are used so that the cleaning liquid and the like are intermittently discharged from the nozzles N13 and N15, and the discharge timings of the cleaning liquid and the like from the nozzles N13 and N15 are not overlapped.
- the opening / closing timing is controlled. For this reason, it is possible to effectively prevent a decrease in the internal pressure of the nitrogen gas in the circulation path 101 and the discharge paths 103 and 104 and a decrease in the flow velocity of the cleaning liquid droplets.
- the control unit CNT repeatedly executes Step S24 and Step S25 until the cleaning of the inner walls of the discharge path 103 and the discharge path 104 is completed (Step S26).
- steps S27 to S29 are executed.
- the control unit CNT discharges the cleaning liquid from the nozzle N14 by opening the valves V63 and V67 (step S27). Accordingly, a third discharge path cleaning operation for cleaning the discharge path 105 of the alkaline processing liquid connected to the nozzle N14 in the first processing chamber U11 is executed.
- control unit CNT causes the cleaning liquid to be discharged from the nozzle N16 by opening the valves V64 and V69 (step S28).
- a fourth discharge path cleaning operation for cleaning the alkaline process liquid discharge path 106 connected to the nozzle N16 in the second processing chamber U12 is executed.
- control unit CNT repeatedly executes step S27 and step S28 until the cleaning of the inner walls of the discharge path 105 and the discharge path 106 is completed (step S29).
- the opening / closing timings of the valves V63, V64, V67, V69 are controlled so that the nozzle N14 and the nozzle N16 intermittently discharge the cleaning liquid and the like. Further, the discharge timing of the cleaning liquid or the like from the nozzle N14 and the nozzle N16 is shifted. These controls are based on the same reason as the control of the discharge operation of the cleaning liquid or the like from the nozzle N13 and the nozzle N15.
- the cleaning liquid for cleaning the acidic processing liquid supply path (circulation path 101 and discharge paths 103 and 104) and the cleaning liquid for cleaning the alkaline processing liquid supply path (circulation path 102 and discharge paths 105 and 106) are used. You may want to collect them separately.
- the timings of the first discharge path cleaning operation (step S24) and the third discharge path cleaning operation (step S27) are shifted, and the second discharge path cleaning operation (step S25) and the fourth The timing of the discharge path cleaning operation (step S28) may be shifted.
- the pipe P72 constituting the circulation path 101 or the circulation path 102 is supplied to the pipe P72 per unit time so that a sufficient amount of nitrogen gas is discharged together with the cleaning liquid from the nozzles N13, N14, N15, and N16. It is necessary to continuously supply an amount of nitrogen gas sufficiently larger than the supply amount of the cleaning liquid. For this reason, the supply amount per unit time of the nitrogen gas supplied to the pipe P72 is preferably set to be several times or more the supply amount per unit time of the cleaning liquid supplied to the pipe P72.
- the supply amount refers to the volume of nitrogen gas and cleaning liquid under atmospheric pressure.
- control unit CNT closes the valves V42 and V43 to end the supply of nitrogen gas (step S30).
- the control unit CNT stops the operation of the pumps P52 and P55 and ends the circulation of the cleaning liquid in the circulation paths 101 and 102 (step S31).
- the controller CNT discharges the cleaning liquid from the first processing liquid tank T21 and the second processing liquid tank T22, closes all the valves, and ends the cleaning operation (step S32). The operator removes the cleaning unit 1A of the substrate processing system 100a from the substrate processing apparatus 3a as necessary.
- the substrate processing system 100a that processes a substrate using two types of processing liquids, an acidic processing liquid and an alkaline processing liquid, is cleaned, but the substrate is processed with a single processing liquid.
- the substrate processing system may be cleaned by the cleaning unit 1A of this example.
- a substrate processing system for processing a substrate with three or more kinds of processing liquids may be cleaned by the cleaning unit 1A of this example.
- FIG. 19 is a schematic diagram showing the configuration of the main part of the processing liquid supply unit in the fourth embodiment.
- the treatment liquid supply unit 2 is provided with a supply unit S41 of nitrogen gas as an inert gas.
- Supply part S41 is connected with the piping P13 in the connection part C44 through the nitrogen gas supply path 109 which has the valve
- the pipe P13 in FIG. 1 constitutes the circulation path 101 in FIG. 14, and the pipes P15 and P16 in FIG. 1 constitute the discharge paths 103 and 104 in FIG.
- the valves V12 and V13 in FIG. 1 correspond to the valves V61, V62, V66, and V68 in FIG.
- Such a configuration makes it possible to mix nitrogen gas from the connection portion C44 into the first cleaning liquid circulating in the pipe P13 in steps S3 and S4 in FIG. Moreover, it becomes possible to mix nitrogen gas from the connection part C44 in the 2nd washing
- FIG. 20 is a schematic diagram showing the configuration of the main part of the processing liquid supply unit in the fifth embodiment.
- the treatment liquid supply unit 2 is provided with a supply unit S41 of nitrogen gas as an inert gas.
- Supply part S41 is connected with the piping P13 in the connection part C44 through the nitrogen gas supply path 109 which has the valve
- the supply part S41 is connected to the pipe P13a at the connection part C45 through the nitrogen gas supply path 110 having the valve V43.
- the pipe P13 in FIG. 12 constitutes the circulation path 101 in FIG. 14
- the pipe P13a in FIG. 12 constitutes the circulation path 102 in FIG. 14
- the pipes P15 and P16 in FIG. 104, and the pipes P15a and P16a in FIG. 12 constitute the discharge paths 105 and 106 in FIG.
- valves V12 and V13 in FIG. 12 correspond to the valves V61, V62, V66, and V68 in FIG. 14, and the valves V12a and V13a in FIG. 12 correspond to the valves V63, V64, V67, and V69 in FIG.
- Such a configuration makes it possible to mix nitrogen gas from the connection portions C44 and C45 into the first cleaning liquid circulating through the pipes P13 and P13a in steps S3 and S4 in FIG. Moreover, it becomes possible to mix nitrogen gas from the connection parts C44 and C45 in the 2nd washing
- the pipe P2 and the pipe P2a may be provided separately without being connected. Further, in the treatment liquid supply unit 2 of FIG. 12, the pipe P11 and the pipe P11a may be provided separately without being connected. In this case, the pipes P2 and P2a of the cleaning unit 1 can be connected to the pipes P11 and P11a of the processing liquid supply unit 2, respectively.
- the cleaning liquid is supplied from the cleaning liquid tank 11 of FIG. 13 to the processing liquid tank 21 of FIG. 12 through the pipe P2, and the processing liquid is supplied from the cleaning liquid tank 11a of FIG. 13 to the processing liquid tank 21a of FIG. .
- control units 17, 24, and 35 are provided in the cleaning unit 1, the processing liquid supply unit 2, and the substrate processing apparatus 3, respectively, but the present invention is not limited to this. Instead of the plurality of control units 17, 24, and 35, a single control unit that controls the cleaning unit 1, the processing liquid supply unit 2, and the substrate processing apparatus 3 may be provided.
- the substrate processing apparatus 3 is an example of a substrate processing apparatus
- the processing liquid supply units 2 and 2a are examples of a processing liquid supply unit
- the cleaning unit 1 is an example of a processing unit
- the tanks 21 and 21a are examples of processing liquid tanks
- the processing unit 31 is an example of a processing unit
- the pipes P13, P15. P16, P13a, P15a, and P16a are examples of piping.
- Pipes P2, P11, and P2a are examples of supply paths
- valves V7, V8, V7a, and V8a are examples of switchgear
- nitrogen gas is an example of an inert gas or gas
- pipe P12 is inert. It is an example of a gas supply part
- piping P13, P13a is an example of a circulation path.
- the nitrogen gas supply paths 109 and 110 are examples of a gas supply system
- the period of steps S3 and S4 is an example of the first period
- the period of steps S6 and S7 is an example of the second period.
- Piping P15. P16, P15a, and P16a are examples of discharge paths
- the processing unit 31 is an example of a processing chamber
- the nozzle 34 is an example of a nozzle
- the valves V12, V13, V12a, and V13a are examples of valves, and are T-shaped.
- the small diameter part of the pipe P71 is an example of a pipe line.
- the present invention can be used for cleaning piping in a substrate processing system.
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Abstract
Description
(1)基板処理システムの全体の構成
図1は本発明の第1の実施の形態に係る基板処理システムの構成を示す模式図である。
次に、基板処理システム100における配管洗浄動作について説明する。洗浄ユニット1の制御部17、処理液供給ユニット2の制御部24および基板処理装置3の制御部35は、相互に通信を行いつつそれぞれ洗浄ユニット1、処理液供給ユニット2および基板処理装置3の動作を制御する。
本実施の形態に係る基板処理システム100においては、第1洗浄液による配管P13,P15~P17の洗浄(ステップS4)と並行して、洗浄ユニット1において第2洗浄液の準備(ステップS5)を行うことができる。また、第2洗浄液による配管P13,P15~P17の洗浄(ステップS7)と並行して、洗浄ユニット1において第3洗浄液の準備(ステップS9)を行うことができる。したがって、第1洗浄液および第2洗浄液による配管P13,P15~P17の洗浄に要する時間を短縮することができる。その結果、複数の洗浄液を用いて短時間で配管P13,P15~P17を洗浄することが可能になる。
図12は本発明の第2の実施の形態に係る基板処理システムの構成を示す模式図である。第2の実施の形態に係る基板処理システム100の構成および動作は、以下の点を除いて第1の実施の形態に係る基板処理システム100の構成および動作と同様である。
第3の実施の形態に係る基板処理システムは、洗浄ユニット1の構成を除いて第1の実施の形態に係る基板処理システム100と同じ構成を有する。図13は本発明の第3の実施の形態における洗浄ユニットの主要部の構成を示す模式図である。
図14は洗浄ユニットの他の例を含む基板処理システムの構成を示す模式図である。基板処理システム100aは、基板処理装置3a、第1処理液タンクT21、第2処理液タンクT22、処理液供給経路(処理液供給機構)および洗浄ユニット1Aを含む。
第4の実施の形態に係る基板処理システムでは、第1の実施の形態に係る基板処理システム100(図1)の処理液供給ユニット2に図14~図18の洗浄ユニット1Aの構成の一部が適用される。図19は第4の実施の形態における処理液供給ユニットの主要部の構成を示す模式図である。
第5の実施の形態に係る基板処理システムでは、第2の実施の形態に係る基板処理システム100(図12)の処理液供給ユニット2に図14~図18の洗浄ユニット1Aの構成が適用される。図20は第5の実施の形態における処理液供給ユニットの主要部の構成を示す模式図である。
(a)上記の第1の実施の形態において、第1洗浄液としてSC1を用い、第2洗浄液として純水を用い、第3洗浄液としてSC2を用い、第4洗浄液として純水を用いてもよい。この場合には、第1洗浄液および第2洗浄液について図2のステップS1~S8を行った後、第3洗浄液および第4洗浄液についてステップS1~S8を行い、その後、ステップS9~S13を行う。それにより、SC1を用いて処理液タンク21および配管P13,P15~P17のパーティクルを洗浄し、SC2を用いて処理液タンク21および配管P13,P15~P17の金属系汚染物を洗浄することができる。
以下、請求項の各構成要素と実施の形態の各部との対応の例について説明するが、本発明は下記の例に限定されない。
Claims (15)
- 基板に処理を行う基板処理装置と、
前記基板処理装置に配管を通して処理液を供給する処理液供給ユニットと、
洗浄ユニットとを備え、
前記処理液供給ユニットは、基板の処理時に、前記処理液を貯留する処理液タンクを含み、
前記基板処理装置は、基板の処理時に、基板に前記処理液を供給する処理ユニットを含み、
前記処理液タンクと前記処理ユニットとは前記配管により接続され、
前記洗浄ユニットは、前記配管の洗浄時に、第1洗浄液を前記処理液供給ユニットの前記処理液タンクに供給した後に、第2洗浄液の準備を行い、準備された前記第2洗浄液を前記処理液タンクに供給するように構成され、
前記処理液供給ユニットは、前記配管の洗浄時に、前記洗浄ユニットから供給された前記第1洗浄液を前記処理液タンクに貯留した後、前記処理液タンク内の前記第1洗浄液を前記配管を通して前記処理ユニットに供給することにより前記配管を洗浄し、前記洗浄ユニットから供給された前記第2洗浄液を前記処理液タンクに貯留した後、前記処理液タンク内の前記第2洗浄液を前記配管を通して前記処理ユニットに供給することにより前記配管を洗浄するように構成され、
前記洗浄ユニットは、前記第1洗浄液による前記配管の洗浄と並行して前記第2洗浄液の準備を行う、基板処理システム。 - 前記洗浄ユニットから前記処理液タンクへ前記第1洗浄液および前記第2洗浄液を供給するための供給経路と、
前記供給経路を開閉する開閉装置とをさらに備え、
前記開閉装置は、前記洗浄ユニットから前記処理液タンクへの前記第1洗浄液の供給時に前記供給経路を開き、前記処理液タンクへの前記第1洗浄液の供給後に前記供給経路を閉じる、請求項1記載の基板処理システム。 - 前記第2洗浄液による前記配管の洗浄後に、前記供給経路および洗浄ユニット内に不活性ガスを供給する不活性ガス供給部をさらに備える、請求項2記載の基板処理システム。
- 前記洗浄ユニットは、前記処理液供給ユニットに対して接続および切り離し可能に設けられる、請求項1~3のいずれか一項に記載の基板処理システム。
- 前記処理液供給ユニットは、複数の前記処理液タンクを含み、
前記洗浄ユニットは、前記複数の処理液タンクに接続可能に構成される、請求項1~4のいずれかに記載の基板処理システム。 - 前記処理液供給ユニットは、前記処理液タンクの前記第1洗浄液をフィルタを通して循環させる循環経路をさらに含み、
前記洗浄ユニットは、前記循環経路による前記第1洗浄液の循環と並行して前記第2洗浄液の準備を行う、請求項1~5のいずれか一項に記載の基板処理システム。 - 前記配管に第1洗浄液が供給される第1の期間および前記配管に第2洗浄液が供給される第2の期間の少なくとも一方の期間に前記配管に気体を供給するように構成される気体供給系をさらに備える、請求項1~5のいずれか一項に記載の基板処理システム。
- 前記気体供給系は、前記第1の期間に前記配管に供給される第1洗浄液に対して、単位時間当たりの第1洗浄液の供給量以上の量の気体を連続的に供給するように構成される、請求項7記載の基板処理システム。
- 前記気体供給系は、前記第2の期間に前記配管に供給される第2洗浄液に対して、単位時間当たりの第2洗浄液の供給量以上の量の気体を連続的に供給するように構成される、請求項7または8記載の基板処理システム。
- 前記配管は、前記処理液タンクから送出される処理液を前記処理液タンクに戻す循環経路と、前記循環経路から処理液を前記処理ユニットに供給する吐出経路とを構成し、
前記気体供給系は、前記少なくとも一方の期間において前記循環経路に気体を供給するように構成される、請求項7~9のいずれか一項に記載の基板処理システム。 - 前記基板処理装置は、
処理室と、
前記循環経路から前記吐出経路を通して供給される処理液を前記処理室内で基板に吐出するノズルとを含み、
前記吐出経路にバルブが設けられ、
前記バルブが間欠的に開かれることにより前記循環経路を循環する洗浄液が前記ノズルから間欠的に吐出される、請求項10記載の基板処理システム。 - 前記基板処理装置は、
複数の前記処理室と、
前記複数の前記処理室にそれぞれ設けられる複数の前記ノズルとを含み、
前記配管は、複数の前記吐出経路を構成し、
前記複数の吐出経路にそれぞれ複数の前記バルブが設けられ、
前記少なくとも一方の期間において前記複数のバルブが互いに異なるタイミングで開かれる、請求項11記載の基板処理システム。 - 前記気体供給系は、前記複数のノズルから気体が吐出されるように、前記少なくとも一方の期間において単位時間当たりに供給される第1洗浄液または第2洗浄液の量よりも多い量の気体を連続的に供給する、請求項12記載の基板処理システム。
- 前記気体供給系は、前記少なくとも一方の期間において前記循環経路を循環する第1洗浄液または第2洗浄液に対して、第1洗浄液または第2洗浄液の流れの方向と同じ方向に気体を供給する管路をさらに含み、
前記管路は、前記循環経路の内径よりも小さな内径を有する、請求項10~13のいずれか一項に記載の基板処理システム。 - 基板処理装置および処理液供給ユニットにおける配管を洗浄する配管洗浄方法であって、
前記処理液供給ユニットは、基板の処理時に、前記処理液供給ユニットの処理液タンクから配管を通して前記基板処理装置の処理ユニットに処理液を供給するように構成され、
前記配管洗浄方法は、
前記配管の洗浄時に、洗浄ユニットから前記処理液供給ユニットの前記処理液タンクに第1洗浄液を供給するステップと、
前記処理液タンクへの前記第1洗浄液の供給後、前記処理液タンクから前記配管を通して前記基板処理装置の前記処理ユニットに前記第1洗浄液を供給することにより前記配管を洗浄するステップと、
前記第1洗浄液による前記配管の洗浄と並行して前記洗浄ユニットにおいて第2洗浄液の準備を行うステップと、
前記第1洗浄液による前記配管の洗浄後、前記洗浄ユニットから前記処理液タンクに前記第2洗浄液を供給するステップと、
前記処理液タンクへの前記第2洗浄液の供給後、前記処理液タンクから前記配管を通して前記処理ユニットに前記第2洗浄液を供給することにより前記配管を洗浄するステップとを含む、配管洗浄方法。
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US9972513B2 (en) | 2016-03-07 | 2018-05-15 | Shibaura Mechatronics Corporation | Device and method for treating a substrate with hydrofluoric and nitric acid |
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KR20190085101A (ko) * | 2017-01-18 | 2019-07-17 | 가부시키가이샤 스크린 홀딩스 | 기판 처리 장치 및 기판 처리 방법 |
KR102180862B1 (ko) | 2017-01-18 | 2020-11-19 | 가부시키가이샤 스크린 홀딩스 | 기판 처리 장치 및 기판 처리 방법 |
US11881417B2 (en) | 2017-01-18 | 2024-01-23 | SCREEN Holdings Co., Ltd. | Substrate processing apparatus and substrate processing method |
TWI733977B (zh) * | 2017-02-22 | 2021-07-21 | 日商斯庫林集團股份有限公司 | 基板處理裝置 |
CN110653131A (zh) * | 2018-06-29 | 2020-01-07 | 夏普株式会社 | 处理液供给装置 |
US20200402818A1 (en) * | 2019-06-24 | 2020-12-24 | Semes Co., Ltd. | Unit for supplying liquid, apparatus and method for treating substrate having the unit |
US11658048B2 (en) * | 2019-06-24 | 2023-05-23 | Semes Co., Ltd. | Unit for supplying liquid, apparatus and method for treating substrate having the unit |
JP7461288B2 (ja) | 2020-12-28 | 2024-04-03 | 株式会社Screenホールディングス | 基板処理装置、洗浄ユニット、および、多連弁洗浄方法 |
Also Published As
Publication number | Publication date |
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TWI628007B (zh) | 2018-07-01 |
CN106104762A (zh) | 2016-11-09 |
TW202110545A (zh) | 2021-03-16 |
TW201836722A (zh) | 2018-10-16 |
KR20190003822A (ko) | 2019-01-09 |
TW201542301A (zh) | 2015-11-16 |
US20170014873A1 (en) | 2017-01-19 |
CN109285800B (zh) | 2022-02-08 |
KR102049193B1 (ko) | 2019-11-26 |
KR20180033594A (ko) | 2018-04-03 |
CN106104762B (zh) | 2018-12-11 |
KR20160131100A (ko) | 2016-11-15 |
CN109285800A (zh) | 2019-01-29 |
TWI709443B (zh) | 2020-11-11 |
KR101842824B1 (ko) | 2018-03-27 |
TWI760883B (zh) | 2022-04-11 |
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