WO2021192990A1 - 基板処理装置および基板処理方法 - Google Patents
基板処理装置および基板処理方法 Download PDFInfo
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- WO2021192990A1 WO2021192990A1 PCT/JP2021/009141 JP2021009141W WO2021192990A1 WO 2021192990 A1 WO2021192990 A1 WO 2021192990A1 JP 2021009141 W JP2021009141 W JP 2021009141W WO 2021192990 A1 WO2021192990 A1 WO 2021192990A1
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- Prior art keywords
- circulation line
- temperature
- substrate processing
- liquid
- substrate
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- 239000000758 substrate Substances 0.000 title claims abstract description 161
- 238000003672 processing method Methods 0.000 title claims description 6
- 239000007788 liquid Substances 0.000 claims abstract description 114
- 238000010438 heat treatment Methods 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims description 24
- 230000008569 process Effects 0.000 claims description 23
- 238000003756 stirring Methods 0.000 claims description 8
- 239000000126 substance Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 abstract 1
- 238000005530 etching Methods 0.000 description 158
- 239000000243 solution Substances 0.000 description 120
- 230000007246 mechanism Effects 0.000 description 16
- 238000004140 cleaning Methods 0.000 description 15
- 230000003028 elevating effect Effects 0.000 description 12
- 238000001035 drying Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 10
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 9
- 230000007723 transport mechanism Effects 0.000 description 8
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 6
- 230000032258 transport Effects 0.000 description 6
- 235000011007 phosphoric acid Nutrition 0.000 description 5
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 4
- 239000000969 carrier Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 235000012431 wafers Nutrition 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67017—Apparatus for fluid treatment
- H01L21/67063—Apparatus for fluid treatment for etching
- H01L21/67075—Apparatus for fluid treatment for etching for wet etching
- H01L21/67086—Apparatus for fluid treatment for etching for wet etching with the semiconductor substrates being dipped in baths or vessels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/02—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic System or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/302—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to change their surface-physical characteristics or shape, e.g. etching, polishing, cutting
- H01L21/306—Chemical or electrical treatment, e.g. electrolytic etching
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic System or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/302—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to change their surface-physical characteristics or shape, e.g. etching, polishing, cutting
- H01L21/306—Chemical or electrical treatment, e.g. electrolytic etching
- H01L21/30604—Chemical etching
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67098—Apparatus for thermal treatment
- H01L21/67103—Apparatus for thermal treatment mainly by conduction
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67242—Apparatus for monitoring, sorting or marking
- H01L21/67248—Temperature monitoring
Definitions
- the disclosed embodiment relates to a substrate processing apparatus and a substrate processing method.
- Patent Document 1 discloses a substrate processing apparatus that circulates a processing liquid in a substrate processing tank and processes a substrate immersed in the substrate processing tank.
- the present disclosure provides a technique capable of improving the temperature uniformity of the substrate processing tank.
- the substrate processing apparatus includes a substrate processing tank, a first circulation line, and a second circulation line.
- the substrate is processed by being immersed in the processing liquid.
- the first circulation line is connected to the substrate processing tank, and the processing liquid discharged from the substrate processing tank flows into the substrate processing tank.
- the second circulation line is connected to the first circulation line, and the treatment liquid discharged from the substrate treatment tank is merged with the first circulation line.
- the first circulation line includes a first liquid feeding unit for pressure-feeding the processing liquid, a heating unit for heating the processing liquid, and a filter for removing foreign substances in the processing liquid.
- the second circulation line includes a second liquid feeding unit that pumps the processing liquid.
- the temperature uniformity of the substrate processing tank can be improved.
- FIG. 1 is a schematic plan view of the substrate processing apparatus according to the embodiment.
- FIG. 2 is a schematic block diagram showing a configuration of a processing tank for etching according to an embodiment.
- FIG. 3 is a block diagram illustrating a part of the control device according to the embodiment.
- FIG. 4 is a diagram showing a temperature change of the etching solution in the flow rate adjusting process according to the embodiment.
- FIG. 5 is a flowchart illustrating the flow rate adjusting process according to the embodiment.
- FIG. 6 is a schematic block diagram showing a configuration of a processing tank for etching according to a modified example of the embodiment.
- FIG. 7 is a schematic block diagram showing a configuration of a processing tank for etching according to a modified example of the embodiment.
- the substrate processing apparatus 1 controls the carrier loading / unloading section 2, the lot forming section 3, the lot loading section 4, the lot transport section 5, and the lot processing section 6. It has a device 100 and.
- FIG. 1 is a schematic plan view of the substrate processing apparatus 1 according to the embodiment. Here, the direction orthogonal to the horizontal direction will be described as the vertical direction.
- the carrier loading / unloading section 2 carries in and out the carrier 9 in which a plurality of (for example, 25) substrates (silicon wafers) 8 are vertically arranged and housed in a horizontal posture.
- the carrier loading / unloading section 2 includes a carrier stage 10 on which a plurality of carriers 9 are placed, a carrier transport mechanism 11 for transporting the carriers 9, carrier stocks 12 and 13 for temporarily storing the carriers 9, and carriers.
- a carrier mounting table 14 on which the 9 is mounted is provided.
- the carrier loading / unloading section 2 transports the carrier 9 carried into the carrier stage 10 from the outside to the carrier stock 12 and the carrier mounting table 14 using the carrier transport mechanism 11. That is, the carrier loading / unloading section 2 transports the carrier 9 accommodating the plurality of substrates 8 before being processed by the lot processing section 6 to the carrier stock 12 or the carrier mounting table 14.
- the carrier stock 12 temporarily stores the carrier 9 that houses the plurality of substrates 8 before being processed by the lot processing unit 6.
- a plurality of substrates 8 are carried out by the substrate transport mechanism 15 described later from the carrier 9 which is conveyed to the carrier mounting table 14 and accommodates the plurality of substrates 8 before being processed by the lot processing unit 6.
- a plurality of substrates 8 after being processed by the lot processing unit 6 are carried in from the substrate transport mechanism 15 to the carrier 9 which is mounted on the carrier mounting table 14 and does not accommodate the substrate 8.
- the carrier loading / unloading section 2 is mounted on the carrier mounting table 14, and the carrier 9 accommodating a plurality of substrates 8 after being processed by the lot processing section 6 is used as a carrier stock 13 or a carrier by using the carrier transport mechanism 11. Transport to stage 10.
- the carrier 9 transported to the carrier stage 10 is carried out to the outside.
- the lot forming unit 3 is provided with a substrate transfer mechanism 15 that conveys a plurality of (for example, 25) substrates 8.
- the lot forming unit 3 transfers a plurality of (for example, 25) substrates 8 twice by the substrate transport mechanism 15, and forms a lot composed of a plurality of (for example, 50) substrates 8.
- the lot transfer unit 5 transfers lots between the lot loading unit 4 and the lot processing unit 6 and between the inside of the lot processing unit 6.
- the lot transport unit 5 is provided with a lot transport mechanism 19 for transporting lots.
- the lot transfer mechanism 19 has a rail 20 arranged along the lot mounting unit 4 and the lot processing unit 6, and a moving body 21 that moves along the rail 20 while holding the lot by the substrate holding body 22. ..
- the lot processing unit 6 performs processing such as etching, cleaning, and drying on a lot formed of a plurality of substrates 8 arranged in a vertical position in the front-rear position.
- the lot processing unit 6 is provided with two etching processing devices 23, a cleaning processing device 24, a substrate holder cleaning processing device 25, and a drying processing device 26 side by side.
- the etching processing apparatus 23 performs an etching processing on the lot.
- the cleaning processing device 24 performs a lot cleaning processing.
- the substrate holder cleaning treatment device 25 cleans the substrate holder 22.
- the drying processing apparatus 26 performs a lot drying processing.
- the number of etching processing devices 23 is not limited to two, and may be one or three or more.
- the etching processing apparatus 23 includes a processing tank 27 for etching, a processing tank 28 for rinsing, and substrate elevating mechanisms 29 and 30.
- the etching treatment tank 27 stores a treatment liquid for etching (hereinafter referred to as "etching liquid"), and the etching treatment is performed.
- etching liquid a treatment liquid for etching
- a rinsing treatment liquid pure water or the like
- the details of the etching treatment tank 27 will be described later.
- a plurality of substrates 8 forming a lot are held side by side in a vertical posture in the substrate elevating mechanisms 29 and 30.
- the cleaning processing device 24 includes a processing tank 31 for cleaning, a processing tank 32 for rinsing, and substrate elevating mechanisms 33 and 34.
- the cleaning treatment liquid (SC-1, etc.) is stored in the cleaning treatment tank 31.
- a rinsing treatment liquid (pure water or the like) is stored in the rinsing treatment tank 32.
- a plurality of substrates 8 for one lot are held side by side in a vertical posture in the substrate elevating mechanisms 33 and 34.
- the drying processing device 26 has a processing tank 35 and a substrate elevating mechanism 36 that moves up and down with respect to the processing tank 35.
- a processing gas for drying (IPA (isopropyl alcohol), etc.) is supplied to the processing tank 35.
- a plurality of substrates 8 for one lot are held side by side in a vertical posture in the substrate elevating mechanism 36.
- the drying processing device 26 receives the lot from the substrate holder 22 of the lot transport mechanism 19 by the substrate elevating mechanism 36, lowers the received lot by the substrate elevating mechanism 36, carries it into the processing tank 35, and supplies it to the processing tank 35.
- the lot is dried with a processing gas for drying. Then, the drying processing device 26 raises the lot by the substrate elevating mechanism 36, and delivers the dried lot from the substrate elevating mechanism 36 to the substrate holding body 22 of the lot transfer mechanism 19.
- the substrate holder cleaning treatment device 25 has a treatment tank 37, and supplies a treatment liquid for cleaning and a drying gas to the treatment tank 37.
- the substrate holding body cleaning processing device 25 performs the cleaning processing of the substrate holding body 22 by supplying the processing liquid for cleaning to the substrate holding body 22 of the lot transfer mechanism 19 and then supplying the drying gas.
- FIG. 2 is a schematic block diagram showing the configuration of the etching treatment tank 27 according to the embodiment.
- an aqueous solution of phosphoric acid (H3PO4) is used as the etching liquid (treatment liquid) used in the etching treatment.
- the etching process shown here is an example, and the etching solution is not limited to the phosphoric acid aqueous solution.
- the etching treatment tank 27 has an inner tank 43 and an outer tank 44.
- An aqueous phosphoric acid solution and pure water (DIW) are supplied to the treatment tank 27 from each source (not shown) to adjust the phosphoric acid concentration of the etching solution.
- the upper part of the inner tank 43 is opened, and the etching solution is supplied to the vicinity of the upper part.
- a lot (a plurality of substrates 8) is immersed in an etching solution by a substrate elevating mechanism 29, and the substrate 8 is subjected to an etching process. That is, the processing tank 27 (an example of the substrate processing tank) processes the substrate 8 by immersing the substrate 8.
- the inner tank 43 is provided with a temperature sensor 48 that detects the temperature of the etching solution in the inner tank 43.
- the temperature sensor 48 (an example of a second temperature sensor) is provided above the inner tank 43 (an example of a substrate processing tank) and detects the temperature of the etching solution (an example of the processing liquid) of the inner tank 43. Specifically, the temperature sensor 48 detects the temperature of the etching solution in the upper part of the inner tank 43.
- the temperature of the etching solution detected by the temperature sensor 48 may be referred to as “in-tank temperature”.
- the outer tank 44 is provided around the upper portion of the inner tank 43, and the upper portion is opened.
- the etching solution overflowing from the inner tank 43 flows into the outer tank 44.
- the outer tank 44 and the inner tank 43 are connected by the first circulation line 50.
- One end of the first circulation line 50 is connected to the outer tank 44, and the other end of the first circulation line 50 is connected to the treatment liquid supply nozzle 46 installed in the inner tank 43.
- the processing liquid supply nozzle 46 is provided at the lower part of the inner tank 43, and discharges the etching liquid from the lower side of the inner tank 43.
- a plurality of processing liquid supply nozzles 46 are provided.
- the first circulation line 50 includes a plurality of branch lines 50a for flowing an etching solution (an example of a processing liquid) into a processing tank 27 (an example of a substrate processing tank).
- the branch lines 50a are provided according to the number of processing liquid supply nozzles 46.
- the branch line 50a is connected to the processing liquid supply nozzle 46. In FIG. 2, three treatment liquid supply nozzles 46 and three branch lines 50a are shown, but the present invention is not limited to these.
- the first circulation line 50 is connected to a processing tank 27 (an example of a substrate processing tank), and an etching solution (an example of a processing liquid) discharged from the processing tank 27 flows into the processing tank 27.
- the first circulation line 50 is provided with a pump 51, a heater 52, a filter 53, a connection portion 54, a mixer 55, and a temperature sensor 56 in this order from the outer tank 44 side. That is, the first circulation line 50 includes a pump 51, a heater 52, a filter 53, a connection portion 54, a mixer 55, and a temperature sensor 56 from the upstream side to the downstream side in the flow direction of the etching solution in the first circulation line 50. Is provided.
- the pump 51 (an example of the first liquid feeding unit) pumps the etching liquid (an example of the processing liquid) in the first circulation line 50.
- the etching solution is sent from the outer tank 44 into the inner tank 43 via the first circulation line 50. Further, the etching solution overflows from the inner tank 43 and flows out to the outer tank 44 again. In this way, the etching solution circulates.
- the pump 51 pumps the etching solution while the substrate 8 is being etched.
- the heater 52 heats an etching solution (an example of a treatment liquid). Specifically, the heater 52 heats the etching solution supplied to the inner tank 43 to a temperature suitable for the etching process.
- the output of the heater 52 that is, the heating amount of the etching solution, is controlled based on the signal from the control device 100 (see FIG. 1).
- the heater 52 is, for example, a sheathed heater.
- the filter 53 removes foreign matter in the etching solution (an example of the treatment solution).
- the second circulation line 60 is connected.
- the mixer 55 (an example of the stirring unit) is provided on the first circulation line 50 on the downstream side of the connecting portion 54, and agitates the etching solution (an example of the treatment liquid).
- the mixer 55 stirs the etching solution flowing through the first circulation line 50. Specifically, the mixer 55 agitates the etching solution flowing through the first circulation line 50 and the etching solution flowing in from the second circulation line 60 to make the temperature of the etching solution uniform.
- the temperature sensor 56 (an example of the first temperature sensor) is provided on the first circulation line 50 on the downstream side of the connection portion 54, and detects the temperature of the etching solution (an example of the treatment liquid) flowing through the first circulation line 50. ..
- the temperature sensor 56 measures the temperature of the etching solution mixed with the etching solution merged from the second circulation line 60.
- the temperature sensor 56 is provided near the inner tank 43. That is, the temperature sensor 56 measures the temperature of the etching solution flowing into the inner tank 43.
- the temperature of the etching solution detected by the temperature sensor 56 may be referred to as an “inflow temperature”.
- the temperature sensor 56 may detect the temperature of the etching solution discharged from the heater 52, that is, the temperature of the etching solution at the outlet of the heater 52.
- a discharge line (not shown) is connected to the first circulation line 50.
- the discharge line is used to replace all or part of the etching solution used in the etching process, and discharges the etching solution.
- the second circulation line 60 is connected to the first circulation line 50, and the etching solution discharged from the processing tank 27 (an example of the substrate processing tank) is merged with the first circulation line 50.
- One end of the second circulation line 60 is connected to the outer tank 44, and the other end of the second circulation line 60 is connected to the connection portion 54 of the first circulation line 50. That is, the second circulation line 60 bypasses the pump 51, the heater 52, and the filter 53 provided in the first circulation line 50, and is connected to the first circulation line 50.
- the second circulation line 60 includes a pump 51 (an example of a first liquid feeding unit) and a heater 52 (an example of a heating unit) in the flow direction of the etching solution (an example of a treatment liquid) in the first circulation line 50. It is connected to the connection portion 54 on the downstream side.
- the second circulation line 60 includes a pump 61 that pumps an etching solution (an example of a processing solution).
- the second circulation line 60 is not provided with the heater 52 provided in the first circulation line 50. Therefore, the second circulation line 60 has a smaller pressure loss when the etching solution is pumped than the first circulation line 50.
- the control device 100 controls the operation of each unit (carrier loading / unloading unit 2, lot forming unit 3, lot loading unit 4, lot transport unit 5, lot processing unit 6) of the substrate processing device 1.
- the control device 100 controls the operation of each part of the substrate processing device 1 based on a signal from a switch or the like.
- FIG. 3 is a block diagram illustrating a part of the control device 100 according to the embodiment.
- the control device 100 includes a control unit 110 and a storage unit 120.
- the control unit 110 includes an acquisition unit 111, a calculation unit 112, a determination unit 113, and an instruction unit 114.
- the control unit 110 includes, for example, a computer having a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), an HDD (Hard Disk Drive), an input / output port, and various circuits.
- a CPU Central Processing Unit
- ROM Read Only Memory
- RAM Random Access Memory
- HDD Hard Disk Drive
- the CPU of the computer functions as the acquisition unit 111 of the control unit 110, the calculation unit 112, the determination unit 113, and the instruction unit 114, for example, by reading the program stored in the ROM into the RAM and executing the program.
- the RAM is used as a work area of the CPU.
- the RAM can temporarily store data and the like obtained by the etching process.
- control unit 110 can be configured by hardware such as an ASIC (Application Specific Integrated Circuit) or an FPGA (Field Programmable Gate Array).
- ASIC Application Specific Integrated Circuit
- FPGA Field Programmable Gate Array
- the storage unit 120 is a storage medium that can be read by a computer.
- the storage unit 120 stores programs that control various processes executed by the substrate processing device 1.
- the control device 100 controls the operation of the substrate processing device 1 by reading and executing the program stored in the storage unit 120.
- the program may be stored in the storage unit 120 readable by a computer, and may be installed in the storage unit 120 of the control device 100 from another storage medium.
- Examples of the storage unit 120 that can be read by a computer include a hard disk (HD), a flexible disk (FD), a compact disk (CD), a magnet optical disk (MO), and a memory card.
- HD hard disk
- FD flexible disk
- CD compact disk
- MO magnet optical disk
- the acquisition unit 111 acquires signals from the temperature sensors 48 and 56, respectively.
- the calculation unit 112 calculates the first temperature difference and the second temperature difference.
- the first temperature difference is the difference between the temperature detected by the temperature sensor 56 and the temperature detected by the temperature sensor 48. That is, the first temperature difference is the difference between the inflow temperature and the temperature inside the tank.
- the second temperature difference is the difference between the inflow temperature and the desired temperature of the etching solution flowing into the inner tank 43.
- the desired temperature is a preset temperature, which is a set temperature of the temperature inside the tank.
- the determination unit 113 determines whether or not the first temperature difference is larger than the preset first threshold value.
- the determination unit 113 determines whether or not the second temperature difference is larger than the preset second threshold value.
- the second threshold is smaller than the first threshold.
- the first threshold is, for example, 3 ° C.
- the second threshold is, for example, 2 ° C.
- the determination unit 113 determines whether or not the processing for the substrate 8 is completed. For example, the determination unit 113 determines whether or not a preset processing time has elapsed after the substrate 8 is immersed in the inner tank 43. The determination unit 113 determines that the processing on the substrate 8 is completed when the processing time elapses after the substrate 8 is immersed in the inner tank 43.
- the instruction unit 114 generates an instruction signal that sets the flow rate of the pump 51 provided in the first circulation line 50 to a preset constant flow rate.
- the instruction unit 114 When the first temperature difference is larger than the first threshold value, the instruction unit 114 generates an instruction signal for adjusting the flow rate of the pump 61 provided in the second circulation line 60 by the first flow rate control. Specifically, the indicator unit 114 generates an instruction signal for adjusting the flow rate of the pump 61 based on the first temperature difference so that the first temperature difference is equal to or less than the first threshold value. For example, the indicator 114 operates the pump 61 to generate an instruction signal to increase the flow rate of pumping the etching solution from the second circulation line 60.
- the indicator 114 sets the flow rate of the pump 61 provided in the second circulation line 60 as the second flow rate. Generates an instruction signal to be adjusted by control. Specifically, the indicator unit 114 generates an instruction signal for adjusting the flow rate of the pump 61 based on the second temperature difference so that the second temperature difference is equal to or less than the second threshold value. For example, the instruction unit 114 operates the pump 61 to generate an instruction signal for pumping a flow rate smaller than the flow rate in the first flow rate control from the second circulation line 60 to the first circulation line 50.
- the indicator unit 114 When the second temperature difference is equal to or less than the second threshold value, the indicator unit 114 generates an instruction signal for adjusting the flow rate of the pump 61 provided in the second circulation line 60 by stable control. Specifically, the indicator 114 is an instruction signal that controls the flow rate of the pump 61 provided in the second circulation line 60 based on the inflow temperature so that the inflow temperature detected by the temperature sensor 56 becomes a desired temperature. To generate. For example, the indicator 114 stops the operation of the pump 61 to generate an instruction signal to stop the pumping from the second circulation line 60.
- the instruction unit 114 outputs the generated instruction signal to the pumps 51 and 61.
- the pump 51 provided in the first circulation line 50 pumps the etching solution at a constant flow rate.
- the pump 61 provided in the second circulation line 60 pumps the etching solution at the flow rate set by each control.
- control device 100 controls the pump 51 (an example of the first liquid feeding unit) and the pump 61 (an example of the second liquid feeding unit).
- the control device 100 controls the flow rate of the etching solution (an example of the treatment liquid) pumped by the pump 61 (an example of the second liquid feeding unit) based on the inflow temperature (an example of the temperature detected by the temperature sensor 56). do.
- the flow rate of the etching solution in the second circulation line 60 is adjusted, and the flow rate of the etching solution flowing from the processing solution supply nozzle 46 into the inner tank 43 is adjusted.
- the etching solution flowing through the first circulation line 50 and the etching solution flowing through the second circulation line 60 are merged by the connecting portion 54. Therefore, by adjusting the flow rate of the etching solution in the second circulation line 60, the temperature of the etching solution downstream from the connection portion 54 is adjusted.
- FIG. 4 is a diagram showing a temperature change of the etching solution in the flow rate adjusting process according to the embodiment.
- the temperature inside the tank is shown by a solid line.
- the inflow temperature is shown by a chain double-dashed line.
- the substrate 8 is immersed in the inner tank 43. Since the temperature of the substrate 8 is lower than the temperature of the etching solution in the inner tank 43, the temperature inside the tank is lowered by immersing the substrate 8. In addition, the temperature of the etching solution flowing through the first circulation line 50 also decreases. Since the heater 52 is provided in the first circulation line 50 and the etching solution is heated, the temperature drop of the inflow temperature is smaller than the temperature drop of the tank temperature. Therefore, the first temperature difference, which is the difference between the inflow temperature and the temperature inside the tank, becomes larger than the first threshold value.
- the pump 61 provided in the second circulation line 60 is controlled by the first flow rate control.
- the flow rate of the pump 61 provided in the second circulation line 60 is adjusted by the first flow rate control based on the first temperature difference, and the etching solution heated by the heater 52 provided in the first circulation line 50 is subjected to the second. 2
- the etching solutions flowing through the circulation line 60 merge.
- the etching solution in which the temperature difference from the etching solution in the inner tank 43 is suppressed is released from the treatment liquid supply nozzle 46 to the inner tank. It flows into 43.
- the substrate processing apparatus 1 heats the etching solution by the heater 52 provided in the first circulation line 50, and transfers the etching solution from the processing solution supply nozzle 46 in which the temperature difference from the etching solution in the inner tank 43 is suppressed. It flows into the inner tank 43. Therefore, it is suppressed that a temperature difference occurs in the etching solution in the inner tank 43, and the temperature uniformity of the etching solution is improved.
- the flow rate of the etching solution flowing into the inner tank 43 is increased by the second circulation line 60 in which the heater or the like is not provided. Therefore, the substrate processing apparatus 1 increases the flow rate of the etching solution flowing into the inner tank 43 while suppressing the increase in pressure loss. Therefore, the stirring property of the etching solution in the inner tank 43 is improved, and the temperature uniformity of the etching solution is improved.
- the temperature of the etching solution in the inner tank 43 becomes higher and the first temperature difference becomes smaller.
- the flow rate of the pump 61 provided in the second circulation line 60 is adjusted by the second flow rate control.
- the flow rate of the pump 61 provided in the second circulation line 60 is adjusted based on the second temperature difference so that the second temperature difference is equal to or less than the second threshold value.
- the flow rate of the etching solution flowing into the inner tank 43 is adjusted while suppressing the increase in pressure loss, and the temperature inside the tank becomes close to the desired temperature.
- the flow rate of the pump 61 provided in the second circulation line 60 is adjusted by stable control based on the inflow temperature so that the inflow temperature becomes constant. NS.
- the temperature of the etching solution in the inner tank 43 gradually converges to a desired temperature.
- FIG. 5 is a flowchart illustrating the flow rate adjusting process according to the embodiment.
- the control device 100 immerses the substrate 8 in the inner tank 43 by the substrate elevating mechanism 29 (S100).
- the control device 100 determines whether or not the first temperature difference is larger than the first threshold value (S101). When the first temperature difference is larger than the first threshold value (S101: Yes), the control device 100 controls the pump 61 by the first flow rate control to adjust the flow rate of the etching solution in the second circulation line 60 (S101: Yes). S102). That is, in the control device 100, the first temperature difference between the temperature detected by the temperature sensor 56 (an example of the first temperature sensor) and the temperature detected by the temperature sensor 48 (an example of the second temperature sensor) is set in advance.
- the etching solution (an example of the treatment liquid) is pumped by the pump 61 (an example of the second liquid feeding unit) so that the first temperature difference is equal to or less than the first threshold value. Control the flow rate of.
- the control device 100 determines whether or not the second temperature difference is larger than the second threshold value (S103).
- the control device 100 controls the pump 61 by the second flow rate control to adjust the flow rate of the etching solution in the second circulation line 60. (S104). That is, in the control device 100, the second temperature difference between the temperature detected by the temperature sensor 56 (an example of the first temperature sensor) and the desired temperature (set temperature of the preset processing liquid) is greater than the second threshold value.
- the flow rate of the etching solution an example of the treatment liquid
- the pump 61 an example of the second liquid feeding unit
- the control device 100 controls the pump 61 by stability control and adjusts the flow rate of the etching solution in the second circulation line 60 (S105). .. Specifically, the control device 100 adjusts the flow rate of the etching solution in the second circulation line 60 based on the inflow temperature so that the inflow temperature becomes a desired temperature.
- the control device 100 determines whether or not the first temperature difference is larger than the first threshold value (S106). When the first temperature difference is larger than the first threshold value (S106: Yes), the control device 100 controls the pump 61 by the first flow rate control to adjust the flow rate of the etching solution in the second circulation line 60 (S106: Yes). S102).
- the control device 100 determines whether or not to end the etching process when the first temperature difference is equal to or less than the first threshold value (S106: No) (S107), and ends the etching process (S107). : Yes), this process ends. If the control device 100 does not complete the etching process (S107: No), the control device 100 returns to step S105 and repeats the above process.
- the substrate processing apparatus 1 includes a processing tank 27 (an example of a substrate processing tank), a first circulation line 50, and a second circulation line 60.
- the substrate 8 is treated by immersing the substrate 8 in an etching solution (an example of the treatment liquid).
- the first circulation line 50 is connected to the treatment tank 27, and the etching solution discharged from the treatment tank 27 flows into the treatment tank 27.
- the second circulation line 60 is connected to the first circulation line 50, and the etching solution discharged from the processing tank 27 is merged with the first circulation line 50.
- the first circulation line 50 includes a pump 51 (an example of a first liquid feeding unit) that pumps the etching solution, a heater 52 (an example of a heating unit) that heats the etching solution, and a filter 53 that removes foreign substances in the etching solution.
- the second circulation line 60 includes a pump 61 (an example of a second liquid feeding unit) that pumps the etching liquid.
- the substrate processing apparatus 1 can merge the etching solution pumped by the second circulation line 60 with the etching solution flowing through the first circulation line 50 and flow it into the processing tank 27. Therefore, for example, in the substrate processing apparatus 1, when the temperature of the etching solution in the processing tank 27 becomes low immediately after the substrate 8 is immersed in the processing tank 27, the first temperature difference between the temperature inside the tank and the inflow temperature becomes large. It is possible to suppress the increase.
- the substrate processing device 1 can suppress an increase in the first temperature difference without reducing the amount of heating of the etching solution by the heater 52. Therefore, the substrate processing apparatus 1 can improve the temperature uniformity of the etching solution in the processing tank 27. Further, the substrate processing apparatus 1 can increase the flow rate of the etching liquid discharged from the processing liquid supply nozzle 46, improve the agitation of the etching liquid in the inner tank 43, and make the temperature of the etching liquid in the inner tank 43 uniform. It is possible to improve the sex.
- the second circulation line 60 is connected to the pump 51 (an example of the first liquid feeding unit) and the heater 52 (an example of the heating unit) in the flow direction of the etching solution (an example of the treatment liquid) in the first circulation line 50. Is also connected to the connection portion 54 on the downstream side.
- the substrate processing apparatus 1 can join the etching solution flowing through the second circulation line 60 to the first circulation line 50 by using a small pump 61.
- the substrate processing apparatus 1 is provided on the first circulation line 50 on the downstream side of the connecting portion 54, and includes a mixer 55 (an example of a stirring portion) for stirring the etching solution (an example of the processing liquid).
- a mixer 55 an example of a stirring portion for stirring the etching solution (an example of the processing liquid).
- the substrate processing apparatus 1 can agitate the etching solution of the first circulation line 50 after the etching solutions of the second circulation line 60 have merged, and can improve the temperature uniformity of the etching solution. Therefore, for example, the temperature of the etching solution detected by the temperature sensor 56 can be accurately detected.
- the substrate processing device 1 includes temperature sensors 48 and 56.
- the temperature sensor 56 (an example of the first temperature sensor) is provided on the first circulation line 50 on the downstream side of the connection portion 54, and detects the temperature of the etching solution (an example of the treatment liquid).
- the temperature sensor 48 (an example of a second temperature sensor) is provided above the inner tank 43 (an example of a substrate processing tank) and detects the temperature of the etching solution (an example of the processing liquid) of the inner tank 43.
- the substrate processing apparatus 1 can accurately detect the temperature difference of the etching solution in the inner tank 43.
- the substrate processing device 1 includes a control device 100.
- the control device 100 controls the pump 51 (an example of the first liquid feeding unit) and the pump 61 (an example of the second liquid feeding unit).
- the control device 100 controls the flow rate of the etching solution (an example of the processing solution) pumped by the pump 61 based on the temperature detected by the temperature sensor 56 (an example of the first temperature sensor).
- the substrate processing apparatus 1 can adjust the temperature of the etching liquid flowing into the inner tank 43 from the processing liquid supply nozzle 46 by adjusting the flow rate of the etching liquid pumped through the second circulation line 60. .. Therefore, the substrate processing apparatus 1 can easily adjust the temperature of the etching solution flowing into the inner tank 43 from the processing liquid supply nozzle 46.
- the first temperature difference between the inflow temperature (an example of the temperature detected by the first temperature sensor) and the temperature inside the tank (an example of the temperature detected by the second temperature sensor) is set in advance.
- the etching solution (example of the treatment liquid) pumped by the pump 61 (an example of the second liquid feeding unit) so that the first temperature difference becomes equal to or less than the first threshold value. Control the flow rate.
- the substrate processing apparatus 1 can suppress an increase in the temperature difference of the etching solution in the inner tank 43 and improve the temperature uniformity of the etching solution in the inner tank 43. Therefore, the substrate processing apparatus 1 can reduce the variation in the etching amount with respect to the substrate 8.
- the second temperature difference between the inflow temperature (an example of the temperature detected by the first temperature sensor) and the desired temperature (an example of the preset temperature of the processing liquid) is the second threshold value. If it is larger than, the flow rate of the etching solution (an example of the treatment liquid) pumped by the pump 61 (an example of the second liquid feeding unit) is controlled so that the second temperature difference becomes equal to or less than the second threshold value.
- the substrate processing apparatus 1 can set the temperature of the etching solution flowing into the inner tank 43 by the processing liquid supply nozzle 46 to a desired temperature based on the inflow temperature.
- the substrate processing device 1 has a bypass line 62 that branches from the second circulation line 60.
- the bypass line 62 bypasses the connecting portion 54 and connects to a part of the branch lines 50a of the first circulation line 50.
- the bypass line 62 is connected to the branch line 50a provided at a position facing the lower end of the substrate 8 in the branch line 50a.
- FIG. 6 is a schematic block diagram showing a configuration of a processing tank 27 for etching according to a modified example of the embodiment.
- the bypass line 62 may be connected to a plurality of branch lines 50a. Further, the bypass line 62 may be provided with a valve for adjusting the flow rate, an orifice, or the like.
- the substrate processing apparatus 1 according to the modified example can adjust the flow rate of the etching liquid discharged from the processing liquid supply nozzle 46 and the temperature of the etching liquid according to the position of the substrate 8. Therefore, the substrate processing apparatus 1 according to the modified example can improve the temperature uniformity of the etching solution with respect to the substrate 8.
- the substrate processing apparatus 1 may adjust the flow rate of the etching solution by the pump 51 provided in the first circulation line 50 in the etching process.
- one end of the second circulation line 60 may be connected to the first circulation line 50. That is, in the substrate processing device 1 according to the modified example, even if both ends of the second circulation line 60 are connected to the first circulation line 50 and connected so as to bypass the pump 51 and the heater 52 of the first circulation line 50. good.
- the substrate processing apparatus 1 according to the modified example may be provided with a filter 63 for removing foreign matter in the etching solution on the second circulation line 60.
- FIG. 7 is a schematic block diagram showing a configuration of a processing tank 27 for etching according to a modified example of the embodiment.
- the substrate processing device 1 according to the modified example may be provided with a filter 53 on the first circulation line 50 on the downstream side of the connecting portion 54.
- the substrate processing apparatus 1 can suppress the inclusion of foreign matter in the etching solution returned to the inner tank 43.
- the substrate processing device 1 according to the modified example may be provided with a filter 53 on the downstream side of the connecting portion 54.
- the substrate processing apparatus 1 according to the modified example can remove impurities in the etching solution with one filter.
- the substrate processing device 1 according to the above modification can be appropriately combined.
- the substrate processing device 1 according to the modified example may be provided with a filter 53 on the second circulation line 60 and a bypass line 62 on the second circulation line 60.
- Substrate processing device 27 Processing tank (board processing tank) 43 Inner tank 44 Outer tank 46 Processing liquid supply nozzle 48 Temperature sensor (second temperature sensor) 50 1st circulation line 50a Branch line 51 Pump (1st liquid feeding part) 52 Heater (heating part) 53 Filter 54 Connection 55 Mixer (stirring unit) 56 Temperature sensor (1st temperature sensor) 60 Second circulation line 61 Pump (second liquid feed section) 63 Filter 100 Control device 110 Control unit
Abstract
Description
27 処理槽(基板処理槽)
43 内槽
44 外槽
46 処理液供給ノズル
48 温度センサ(第2温度センサ)
50 第1循環ライン
50a 分岐ライン
51 ポンプ(第1送液部)
52 ヒーター(加熱部)
53 フィルタ
54 接続部
55 ミキサー(攪拌部)
56 温度センサ(第1温度センサ)
60 第2循環ライン
61 ポンプ(第2送液部)
63 フィルタ
100 制御装置
110 制御部
Claims (10)
- 基板が処理液に浸漬されることによって前記基板の処理が行われる基板処理槽と、
前記基板処理槽に接続され、前記基板処理槽から排出された前記処理液を前記基板処理槽に流入させる第1循環ラインと、
前記第1循環ラインに接続され、前記基板処理槽から排出された前記処理液を前記第1循環ラインに合流させる第2循環ラインと、
を備え、
前記第1循環ラインは、
前記処理液を圧送する第1送液部と、
前記処理液を加熱する加熱部と、
前記処理液中の異物を除去するフィルタと
を備え、
前記第2循環ラインは、
前記処理液を圧送する第2送液部
を備える
基板処理装置。 - 前記第2循環ラインは、前記第1循環ラインにおける前記処理液の流れ方向において、前記第1送液部、および前記加熱部よりも下流側の接続部に接続される
請求項1に記載の基板処理装置。 - 前記接続部よりも前記下流側の前記第1循環ラインに設けられ、前記処理液を攪拌する攪拌部
を備える請求項2に記載の基板処理装置。 - 前記第1循環ラインは、
前記基板処理槽に前記処理液を流入させる複数の分岐ライン
を備え、
前記第2循環ラインは、
前記接続部をバイパスし、前記複数の分岐ラインのうち一部の分岐ラインに接続するバイパスライン
を備える請求項2または3に記載の基板処理装置。 - 前記第2循環ラインは、
前記処理液中の異物を除去するフィルタ
を備える請求項2~4のいずれか一つに記載の基板処理装置。 - 前記接続部よりも前記下流側の前記第1循環ラインに設けられ、前記処理液の温度を検出する第1温度センサと、
前記基板処理槽の上部に設けられ、前記基板処理槽の前記処理液の温度を検出する第2温度センサと
を備える請求項2~5のいずれか一つに記載の基板処理装置。 - 前記第1送液部、および前記第2送液部を制御する制御装置
を備え、
前記制御装置は、前記第1温度センサによって検出された温度に基づいて、前記第2送液部によって圧送される前記処理液の流量を制御する
請求項6に記載の基板処理装置。 - 前記制御装置は、前記第1温度センサによって検出された温度と、前記第2温度センサによって検出された温度との第1温度差が、予め設定された第1閾値よりも大きい場合には、前記第1温度差が前記第1閾値以下となるように、前記第2送液部によって圧送される前記処理液の流量を制御する
請求項7に記載の基板処理装置。 - 前記制御装置は、前記第1温度センサによって検出された温度と、予め設定された前記処理液の設定温度との第2温度差が、前記第1閾値よりも小さい第2閾値よりも大きい場合には、前記第2温度差が前記第2閾値以下となるように、前記第2送液部によって圧送される前記処理液の流量を制御する
請求項8に記載の基板処理装置。 - 請求項7~9のいずれか一つに記載の基板処理装置における基板処理方法であって、
前記第1温度センサによって温度を検出する工程と、
前記第1温度センサによって検出された温度に基づいて、前記第2送液部によって送液される前記処理液の流量を制御する工程と
を有する基板処理方法。
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Citations (5)
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JPH0845898A (ja) * | 1994-07-29 | 1996-02-16 | Rohm Co Ltd | エッチング装置 |
JP2007207786A (ja) * | 2006-01-30 | 2007-08-16 | Ses Co Ltd | 基板処理方法及び基板処理システム |
JP2012015490A (ja) * | 2010-05-31 | 2012-01-19 | Tokyo Electron Ltd | 基板処理装置、基板処理方法、およびこの基板処理方法を実行するためのコンピュータプログラムが記録された記録媒体 |
JP2017220618A (ja) * | 2016-06-09 | 2017-12-14 | 東京エレクトロン株式会社 | 基板液処理装置、基板液処理方法および記憶媒体 |
JP2018133558A (ja) * | 2017-02-15 | 2018-08-23 | 東京エレクトロン株式会社 | 基板液処理装置 |
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Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0845898A (ja) * | 1994-07-29 | 1996-02-16 | Rohm Co Ltd | エッチング装置 |
JP2007207786A (ja) * | 2006-01-30 | 2007-08-16 | Ses Co Ltd | 基板処理方法及び基板処理システム |
JP2012015490A (ja) * | 2010-05-31 | 2012-01-19 | Tokyo Electron Ltd | 基板処理装置、基板処理方法、およびこの基板処理方法を実行するためのコンピュータプログラムが記録された記録媒体 |
JP2017220618A (ja) * | 2016-06-09 | 2017-12-14 | 東京エレクトロン株式会社 | 基板液処理装置、基板液処理方法および記憶媒体 |
JP2018133558A (ja) * | 2017-02-15 | 2018-08-23 | 東京エレクトロン株式会社 | 基板液処理装置 |
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