WO2023282064A1 - 基板処理システム、及び基板処理方法 - Google Patents
基板処理システム、及び基板処理方法 Download PDFInfo
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- WO2023282064A1 WO2023282064A1 PCT/JP2022/024960 JP2022024960W WO2023282064A1 WO 2023282064 A1 WO2023282064 A1 WO 2023282064A1 JP 2022024960 W JP2022024960 W JP 2022024960W WO 2023282064 A1 WO2023282064 A1 WO 2023282064A1
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- substrates
- substrate
- water
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- 239000000758 substrate Substances 0.000 title claims abstract description 224
- 238000000034 method Methods 0.000 title claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 163
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims abstract description 116
- 239000000126 substance Substances 0.000 claims abstract description 22
- 238000012545 processing Methods 0.000 claims description 172
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- 238000003384 imaging method Methods 0.000 claims description 38
- 230000008569 process Effects 0.000 claims description 11
- 238000003672 processing method Methods 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 5
- 239000000498 cooling water Substances 0.000 claims 1
- 239000007788 liquid Substances 0.000 description 78
- 239000007789 gas Substances 0.000 description 41
- 238000012546 transfer Methods 0.000 description 23
- 230000007704 transition Effects 0.000 description 15
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 11
- 239000000243 solution Substances 0.000 description 10
- 230000015572 biosynthetic process Effects 0.000 description 7
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 6
- 239000007864 aqueous solution Substances 0.000 description 5
- 239000001569 carbon dioxide Substances 0.000 description 5
- 229910002092 carbon dioxide Inorganic materials 0.000 description 5
- 238000007654 immersion Methods 0.000 description 5
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 230000003749 cleanliness Effects 0.000 description 4
- 238000001035 drying Methods 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 230000002378 acidificating effect Effects 0.000 description 3
- 239000012670 alkaline solution Substances 0.000 description 3
- 238000010923 batch production Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 239000008367 deionised water Substances 0.000 description 3
- 229910021641 deionized water Inorganic materials 0.000 description 3
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- 150000007522 mineralic acids Chemical class 0.000 description 3
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- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 2
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- 239000003595 mist Substances 0.000 description 2
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
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- 238000007792 addition Methods 0.000 description 1
- 239000000908 ammonium hydroxide Substances 0.000 description 1
- 238000004380 ashing Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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Images
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
- H01L21/67028—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
- H01L21/67057—Apparatus for fluid treatment for cleaning followed by drying, rinsing, stripping, blasting or the like for wet cleaning or washing 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
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/90—Injecting reactants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/048—Overflow-type cleaning, e.g. tanks in which the liquid flows over the tank in which the articles are placed
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B5/00—Drying solid materials or objects by processes not involving the application of heat
- F26B5/005—Drying solid materials or objects by processes not involving the application of heat by dipping them into or mixing them with a chemical liquid, e.g. organic; chemical, e.g. organic, dewatering aids
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/302—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to change their surface-physical characteristics or shape, e.g. etching, polishing, cutting
- H01L21/304—Mechanical treatment, e.g. grinding, polishing, cutting
-
- 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
- H01L21/67242—Apparatus for monitoring, sorting or marking
- H01L21/67253—Process monitoring, e.g. flow or thickness monitoring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/10—Single element gases other than halogens
- B01D2257/106—Ozone
Definitions
- the present disclosure relates to a substrate processing system and a substrate processing method.
- the substrate processing apparatus described in Patent Document 1 includes a conditioning liquid supply section, a dissolution section, a processing chamber, and a liquid delivery section.
- the adjustment liquid supply unit supplies an adjustment liquid exhibiting a predetermined hydrogen ion concentration.
- the dissolving part dissolves the ozone gas in the adjustment liquid to generate ozone water.
- the processing chamber cleans the substrate with ozone water.
- the liquid feeding section feeds the ozone water from the dissolving section to at least one processing chamber through the liquid feeding line.
- One aspect of the present disclosure provides a technique for improving the efficiency of substrate treatment with ozone water and improving the cleanliness of the substrate treated with ozone water.
- a substrate processing system includes a batch processing section, a single wafer processing section, and a transport section.
- the batch processing section immerses the plurality of substrates in the ozone water stored in the processing tank to process the plurality of substrates at once.
- the single-wafer processing unit treats the substrates one by one with a chemical solution, and the transfer unit transfers the wet substrates from the batch processing unit to the single-wafer processing unit.
- FIG. 1 is a plan view showing a substrate processing system according to one embodiment.
- FIG. 2 is a flowchart illustrating a substrate processing method according to one embodiment.
- FIG. 3 is a diagram showing an example of a supply unit that supplies ozone water to the treatment bath.
- FIG. 4 is a diagram showing another example of a supply section that supplies ozone water to the treatment tank.
- FIG. 5 is a cross-sectional view showing an example of a batch-type liquid processing apparatus.
- FIG. 6 is a cross-sectional view taken along line VI-VI of FIG.
- FIG. 7 is a plan view showing an arrangement example of the ejection port of the gas ejection nozzle and the substrate.
- FIG. 8 is a diagram showing an example of components of the control device in functional blocks.
- FIG. 8 is a diagram showing an example of components of the control device in functional blocks.
- FIG. 9 is a flowchart showing an example of batch processing.
- FIG. 10 is a cross-sectional view showing an example of S209 in FIG.
- FIG. 11 is a cross-sectional view showing an example of S210 in FIG.
- FIG. 12 is a flowchart showing another example of batch processing.
- SPM an aqueous solution of sulfuric acid and hydrogen peroxide
- SPM contains sulfuric acid
- the cost of effluent for SPM is high. Therefore, the use of ozonized water instead of SPM is being studied.
- Patent Document 1 when substrates are treated one by one with ozone water, the throughput is lower than when substrates are treated one by one with SPM.
- the technology of the present disclosure improves throughput by immersing a plurality of substrates in ozone water and processing the plurality of substrates at once. Processing a plurality of substrates at once is also called batch processing, and processing substrates one by one is also called single-wafer processing. Batch processing improves throughput compared to single-wafer processing, but contaminants tend to remain on substrates.
- the substrates are then transported while wet from the batch processing unit to the single substrate processing unit. This is because if the substrate dries, the dirt will adhere firmly to the substrate. If the substrate is transported while wet, it is possible to prevent dirt from firmly adhering to the substrate. Further, according to the technology of the present disclosure, substrates are treated with a chemical solution one by one in the single-wafer processing unit to remove stains remaining on the substrates. Secondary contamination can be suppressed by treating the substrates one by one with the chemical solution. Therefore, the cleanliness of substrates batch-treated with ozone water can be improved.
- the ozonated water should change the dirt on the substrate to the extent that it can be easily dissolved in the chemical solution.
- the chemical solution is not particularly limited, for example, an alkaline solution such as SC1 (aqueous solution of ammonium hydroxide and hydrogen peroxide) is used.
- SC1 aqueous solution of ammonium hydroxide and hydrogen peroxide
- ozonized water oxidizes the resist residue to reduce its molecular weight.
- the alkaline solution dissolves and removes the low-molecular-weight resist residue. Note that the technique of the present disclosure may be applied to other than the removal of resist residues.
- the substrate processing system 1 has a loading/unloading section 2 , a single wafer processing section 3 , an interface section 5 , a batch processing section 6 and a control section 9 .
- the loading/unloading section 2 has a mounting table 21 on which the cassette C is mounted.
- the cassette C accommodates a plurality of (for example, 25) substrates W and is loaded/unloaded to/from the loading/unloading section 2 .
- the single-wafer processing unit 3 processes the substrates W one by one.
- the interface unit 5 transfers substrates W between the single-wafer processing unit 3 and the batch processing unit 6 .
- the batch processing unit 6 processes a plurality of (for example, 50 or 100) substrates W at once.
- the loading/unloading unit 2, the single-wafer processing unit 3, the interface unit 5, and the batch processing unit 6 are arranged in this order from the X-axis direction negative side to the X-axis direction positive side.
- the loading/unloading section 2 has a mounting table 21 , and the mounting table 21 has a plurality of mounting plates 22 .
- a cassette C is mounted on each mounting plate 22 . Note that the number of mounting plates 22 is not particularly limited. Similarly, the number of cassettes C is not particularly limited.
- the loading/unloading section 2 has a first transport area 23, which is adjacent to the mounting table 21 and arranged on the positive side of the mounting table 21 in the X-axis direction.
- a first transport device 24 is provided in the first transport area 23 .
- the first transport device 24 has a first transport arm, which moves horizontally (X-axis direction and Y-axis direction) and vertically, and rotates about a vertical axis.
- the first transport arm transports substrates W between the cassette C and a transfer section 25, which will be described later.
- the number of first transport arms may be one or plural, and in the latter case, the first transport device 24 transports a plurality of (for example, five) substrates W at once.
- the loading/unloading section 2 has a transfer section 25, which is adjacent to the first transfer area 23 and arranged on the positive side of the first transfer area 23 in the X-axis direction.
- the transfer section 25 has a first transition device 26 that temporarily stores the substrate W. As shown in FIG. A plurality of first transition devices 26 may be provided, and a plurality of first transition devices 26 may be vertically stacked.
- the single-wafer processing section 3 has a second transfer area 31, which is adjacent to the transfer section 25 and arranged on the positive side of the transfer section 25 in the X-axis direction.
- a second transport device 32 is provided in the second transport area 31 .
- the second transport device 32 has a second transport arm that moves horizontally (X-axis direction and Y-axis direction) and vertically and rotates around a vertical axis.
- the second transport arm transports substrates between devices adjacent to the second transport area 31 .
- the number of second transport arms may be one or more, and in the latter case, the second transport device 32 transports a plurality of (for example, five) substrates W at once.
- the single-wafer processing unit 3 has, for example, a second transition device 33 and a liquid processing device 34 next to the second transport area 31 .
- the second transition device 33 is adjacent to the second transport area 31 and arranged on the positive side of the second transport area 31 in the X-axis direction.
- the second transition device 33 stores the substrate W temporarily.
- the liquid processing apparatus 34 is of a single-wafer type, and processes the substrates W one by one with a chemical liquid.
- the interface section 5 has, for example, a lot formation section 51 and a transport section 52 .
- the lot formation unit 51 forms a lot L by arranging a plurality of substrates W at a desired pitch.
- One lot L consists of a plurality of substrates W.
- the transport unit 52 transports the substrates W from the single-wafer processing unit 3 to the lot forming unit 51 and transports the substrates W from the batch processing unit 6 to the single-wafer processing unit 3 .
- the batch processing section 6 has a third transfer area 61, which is adjacent to the interface section 5 and arranged on the positive side of the interface section 5 in the X-axis direction.
- a third conveying device 62 is provided in the third conveying area 61 .
- the third transport device 62 has a third transport arm, which moves horizontally (X-axis direction and Y-axis direction) and vertically, and rotates around a vertical axis.
- the third transport arm transports the substrate W between devices adjacent to the third transport area 61 .
- the third transport arm transports lots L collectively.
- the third transport area 61 is rectangular in plan view, and its longitudinal direction is the X-axis direction.
- the lot formation section 51 is arranged next to the short side of the third transfer area 61
- the processing tank 63 is arranged next to the long side of the third transfer area 61
- both the lot formation section 51 and the processing tank 63 are arranged.
- a transport section 52 is arranged. The transport section 52 can access both the lot forming section 51 and the processing tank 63 .
- the arrangement direction of the substrates W differs between the lot formation unit 51 and the processing tank 63 . Therefore, the third transport device 62 rotates around the vertical axis while holding a plurality of substrates W, and changes the arrangement direction of the substrates W between the X-axis direction and the Y-axis direction. In addition, when the arrangement direction of the substrates W does not need to be changed, the third transport device 62 does not have to rotate around the vertical axis.
- the batch processing section 6 has a processing tank 63 that stores ozone water in which the lot L is immersed, and a substrate holding section 64 that receives and holds the lot L from the third transfer device 62 .
- the substrate holding part 64 arranges a plurality of substrates W side by side in the Y-axis direction and holds each substrate W vertically.
- the batch processing section 6 has a driving device 65 for raising and lowering the substrate holding section 64 .
- the control unit 9 is, for example, a computer, and includes a CPU (Central Processing Unit) 91 and a storage medium 92 such as a memory.
- the storage medium 92 stores programs for controlling various processes executed in the substrate processing system 1 .
- the control unit 9 controls the operation of the substrate processing system 1 by causing the CPU 91 to execute programs stored in the storage medium 92 .
- the operation of the substrate processing system 1, that is, the substrate processing method will be described.
- the processing shown in FIG. 2 is performed under the control of the control unit 9 .
- the cassette C containing a plurality of substrates W is loaded into the loading/unloading section 2 and placed on the loading plate 22 .
- the first transport device 24 takes out the substrate W in the cassette C (step S101) and transports it to the first transition device 26.
- the second transport device 32 then receives the substrate W from the first transition device 26 and transports it to the second transition device 33 .
- the transport unit 52 receives the substrate W from the second transition device 33 and transports it to the lot formation unit 51 .
- the lot formation unit 51 arranges a plurality of substrates W at a desired pitch in the X-axis direction to form a lot L (step S102).
- One lot L is composed of, for example, substrates W housed in N cassettes C (N is a natural number equal to or greater than 2).
- the third transport device 62 receives the lot L from the lot forming section 51 and transfers it to the substrate holding section 64 . On the way, the third transfer device 62 rotates around the vertical axis to change the arrangement direction of the plurality of substrates W from the X-axis direction to the Y-axis direction.
- the driving device 65 lowers the substrate holding part 64, immerses the lot L held by the substrate holding part 64 in the ozone water stored in the processing tank 63, and collectively removes the plurality of substrates W.
- Batch process step S103.
- the plurality of substrates W are immersed in the rinse liquid after being immersed in the ozone water.
- the rinse liquid is, for example, DIW (deionized water).
- the driving device 65 raises the substrate holding part 64 to pull up the lot L held by the substrate holding part 64 from the rinse liquid stored in the processing bath 63 .
- the processing tank 63 for storing the rinse liquid and the processing tank 63 for storing the ozone water may be provided separately.
- the driving device 65 moves not only the substrate holder 64 up and down vertically but also horizontally (for example, in the X-axis direction) to transport a plurality of substrates W between the two processing tanks 63 .
- the substrate holding part 64 and the driving device 65 may be provided for each processing tank 63, and in this case, the driving device 65 does not have to move the substrate holding part 64 in the horizontal direction.
- the transport unit 52 receives the substrate W from the substrate holding unit 64, and transports the wet substrate W from the batch processing unit 6 to the single wafer processing unit 3 (step S104). At this time, the transport unit 52 transports the substrates W one by one, but may transport a plurality of substrates W at a time.
- the substrate W may be transported to the liquid processing device 34 without passing through the second transition device 33 or may be transported to the liquid processing device 34 through the second transition device 33 . In the latter case, the second transfer device 32 may transfer the substrate W from the second transition device 33 to the liquid processing device 34 .
- the liquid processing device 34 performs single-wafer processing on the substrates W one by one with a chemical solution (step S105).
- a chemical solution is not particularly limited, for example, an alkaline solution such as SC1 is used.
- the liquid processing device 34 supplies the chemical liquid to the substrate W while rotating the substrate W, for example.
- the chemical solution containing dirt on the substrate W is shaken off from the substrate W by centrifugal force.
- the liquid processing device 34 supplies, for example, the chemical liquid, the rinse liquid, and the drying liquid to the substrate W in this order.
- the drying liquid for example, an organic solvent such as IPA (isopropyl alcohol) is used.
- IPA isopropyl alcohol
- the single-wafer processing unit 3 may have a supercritical drying device, and in that case, the substrate W is transported to the supercritical drying device in a state in which the drying liquid is heaped up.
- the supercritical drying apparatus dries the substrate W using a supercritical fluid.
- the second transport device 32 receives the substrate W from the liquid processing device 34 and transports it to the first transition device 26 .
- the first transport device 24 receives the substrate W from the first transition device 26 and stores it in the cassette C (step S105).
- the cassette C containing a plurality of substrates W is unloaded from the loading/unloading section 2 .
- the substrate processing system 1 collectively immerses a plurality of substrates W in the ozone water stored in the processing tank 63 in the batch processing section 6 , and transfers the substrates W from the batch processing section 6 to the single wafer processing section 3 . are transported while wet, and the substrates W are treated one by one with the chemical solution in the single-wafer processing unit 3 .
- Throughput can be improved by immersing a plurality of substrates W in ozone water at once. After that, by transporting the substrate W wet from the batch processing unit 6 to the single wafer processing unit 3 , it is possible to prevent dirt from firmly adhering to the substrate W. Furthermore, after that, by treating the substrates W one by one with the chemical solution in the single-wafer processing unit 3, the cleanliness of the substrates W batch-treated with the ozone water can be improved.
- the supply unit 70 includes a circulation path 71 and an ozone gas supply unit 72 .
- the circulation path 71 circulates ozone water.
- the capacity of the circulation path 71 is larger than the amount of ozone water used in one batch process.
- the ozone gas supply unit 72 supplies ozone gas to the circulation path 71 .
- Ozone gas dissolves in water to produce ozone water.
- Water, such as DIW, is supplied from a liquid source 73 to the circulation path 71 .
- the ozone gas dissolves in the ozonated water, and the ozone concentration of the ozonated water gradually increases.
- the liquid source 73 may supply an acidic aqueous solution to the circulation path 71 instead of water.
- the acidic aqueous solution contains an organic acid or an inorganic acid.
- the organic acid for example, citric acid, acetic acid, carbonic acid, or the like is used.
- the inorganic acid hydrochloric acid, nitric acid, or the like is used.
- the acidic aqueous solution is effective in removing metal ions contained in resist residues.
- the supply unit 70 includes a pressurizing device 74 , a pressure gauge 75 and a pressure control valve 76 .
- the pressurizing device 74 is, for example, a pump, and pressurizes the ozone water in the circulation path 71 to increase the limit amount (solubility) of ozone gas dissolved in water.
- a pressure gauge 75 measures the pressure of the ozone water.
- a pressure control valve 76 controls the pressure of the ozonated water so that the measured value of the pressure gauge 75 becomes the set value.
- the supply unit 70 includes a cooling device 77 .
- the cooling device 77 cools the ozone water in the circulation path 71 to increase the solubility of the ozone gas.
- Cooling device 77 includes, for example, a Peltier element.
- a thermometer (not shown) may be provided in the circulation path 71, and the cooling device 77 cools the ozone gas so that the temperature of the thermometer reaches the set temperature.
- the supply unit 70 includes a carbon dioxide gas supply unit 78 .
- the carbon dioxide supply unit 78 supplies carbon dioxide (CO 2 gas) to the circulation path 71 .
- CO 2 gas carbon dioxide
- An organic acid or an inorganic acid may be supplied instead of carbon dioxide gas.
- the supply unit 70 includes a filter 79 , a flow meter 80 and an ozone concentration meter 81 .
- a filter 79 collects particles contained in the ozone water in the circulation path 71 .
- a flow meter 80 measures the flow rate of the ozonated water flowing through the circulation path 71 .
- the ozone concentration meter 81 measures the ozone concentration of the ozone water flowing through the circulation path 71 .
- the supply unit 70 includes a branch passage 82 and a direction switching valve 83 .
- the branch path 82 branches off from the circulation path 71 and supplies the ozone water flowing through the circulation path 71 to the treatment tank 63 .
- the direction switching valve 83 switches the direction in which the ozonized water flows between the direction of circulating the ozonized water in the circulation path 71 and the direction of supplying the ozonated water to the treatment tank 63 .
- the processing tank 63 includes, for example, an inner tank 63a and an outer tank 63b.
- the inner tank 63a stores ozone water.
- a plurality of substrates W are immersed in the ozone water stored in the inner tank 63a.
- the outer tank 63b collects the ozone water overflowing from the inner tank 63a.
- a discharge section 85 is connected to the processing bath 63 .
- the discharge unit 85 discharges the used ozonated water.
- the discharge section 85 includes a discharge path 86 and a drainage processing section 87 .
- the discharge path 86 is connected to the processing bath 63 .
- the waste liquid processing unit 87 includes an ozone filter that decomposes ozone into oxygen. Ozone filters have a catalyst or activated carbon.
- the drainage processing unit 87 includes a mesh filter that collects resist residues.
- the imaging device 88 images the ozone water stored in the processing tank 63 (for example, the inner tank 63a). The higher the ozone concentration of the ozonated water, the darker the blue color of the ozonated water.
- the ozone concentration of the ozonated water can be detected by processing the image picked up by the imaging device 88 and acquiring the color information of the ozonated water.
- the place where the substrate W is immersed in the ozone water is not the circulation path 71 but the processing bath 63 . Since the treatment tank 63 has a lower pressure of ozone water and a lower solubility of ozone gas than the circulation path 71, the ozone concentration of the ozone water may be low. If the imaging device 88 is used instead of the ozone concentration meter 81, the ozone concentration of the ozone water can be detected at the place where the substrate W is immersed in the ozone water.
- the imaging device 88 is installed, for example, above the treatment tank 63 so as not to get wet, and images the surface of the ozone water.
- the circulation path 71 shown in FIG. 3 is closed like an endless ring, whereas the circulation path 71 shown in FIG. 4 is open.
- the processing tank 63 has an inner tank 63a and an outer tank 63b, and a circulation path 71 connects the outer tank 63b and the inner tank 63a as shown in FIG.
- One end of the circulation path 71 is connected to the outer tub 63b, and the other end of the circulation path 71 is connected to the inner tub 63a.
- the circulation path 71 returns the ozone water taken out from the outer tank 63b to the inner tank 63a.
- the liquid source 73 may be connected to at least one of the inner tank 63a and the outer tank 63b as shown in FIG. 4 instead of being connected to the circulation path 71 as shown in FIG.
- the batch-type liquid processing apparatus includes a processing bath 63 , a substrate holder 64 , a driving device 65 , a liquid discharge nozzle 66 and a gas discharge nozzle 67 .
- the processing tank 63 stores ozone water in which a plurality of substrates W are immersed together.
- the processing tank 63 may store a rinse liquid.
- the processing tank 63 may be provided with an ultrasonic generator (not shown). The ultrasonic generator applies ultrasonic vibrations to the ozonated water to improve the cleaning efficiency of the substrate W with the ozonated water.
- the substrate holding part 64 arranges a plurality of substrates W side by side in the Y-axis direction and holds each substrate W vertically.
- the substrate holding part 64 has a plurality of (for example, four) holding arms 64a.
- Each holding arm 64a is provided along the Y-axis direction and has a plurality of grooves spaced apart in the Y-axis direction.
- Each substrate W is held by the groove of the holding arm 64a.
- the driving device 65 raises and lowers the substrate holding portion 64 .
- the substrate holding part 64 is moved up and down between a position inside the processing bath 63 and a position above the processing bath 63 .
- the driving device 65 may move the substrate holder 64 horizontally as described above.
- the liquid ejection nozzle 66 is horizontally provided inside the processing bath 63 and ejects the processing liquid inside the processing bath 63 .
- the treatment liquid to be ejected is ozone water or rinse liquid supplied from the supply unit 70 .
- the liquid ejection nozzles 66 are provided, for example, along the Y-axis direction, and are provided in plurality at intervals in the X-axis direction.
- Each liquid ejection nozzle 66 has a plurality of ejection openings 66a spaced apart in the Y-axis direction.
- Each ejection port 66a is provided below the substrate W immersed in the processing liquid.
- Each of the ejection openings 66a ejects the processing liquid directly upward in FIGS. 5 and 6, but may eject the processing liquid obliquely upward.
- the gas ejection nozzle 67 is horizontally provided inside the processing bath 63 and ejects gas inside the processing bath 63 .
- the gas discharge nozzles 67 are provided, for example, along the Y-axis direction, and are provided in plurality at intervals in the X-axis direction.
- Each gas discharge nozzle 67 has a plurality of discharge ports 67a spaced apart in the Y-axis direction.
- Each ejection port 67a is provided below the substrate W immersed in the processing liquid.
- Each of the ejection openings 67a ejects the processing liquid directly upward in FIGS. 5 and 6, but may eject the processing liquid obliquely upward.
- the ejection port 67 a of the gas ejection nozzle 67 is provided below the ejection port 66 a of the liquid ejection nozzle 66 .
- the processing tank 63 stores ozone water, and the gas ejection nozzle 67 ejects the gas while the substrate W is immersed in the ozone water.
- the gas increases the flow rate of the ozonated water and allows the ozonized water to reach the resist residue before the ozonated water is deactivated. Thereby, the removal efficiency of the resist residue can be improved.
- the gas ejection nozzle 67 ejects, for example, oxygen gas or rare gas. Since oxygen gas or rare gas does not react with ozone unlike nitrogen gas, deactivation of ozone water can be suppressed.
- each of the gas discharge nozzles 67-1 and 67-2 fills the first gap G1 or the second gap G2 between two substrates W adjacent to each other in the Y-axis direction. It has a discharge port 67a.
- the discharge port 67a discharges gas directly upward. Since the substrate W does not hinder the rising of the discharged gas, the flow rate of the ozone water is easily increased, and the resist residue is easily removed.
- the first gap G1 and the second gap G2 are arranged alternately in the Y-axis direction.
- Gas ejection nozzles 67-2 having ejection openings 67a only are provided alternately in the X-axis direction. Gas can be discharged widely and uniformly to both the first gap G1 and the second gap G2.
- control unit 9 includes, for example, an image processing unit 101, a density calculation unit 102, a first imaging control unit 103, a first determination unit 104, a second imaging control unit 105, a 2 determination unit 106 .
- the image processing unit 101 processes the image captured by the imaging device 88 and acquires the color information of the ozonated water. By using the imaging device 88, it is possible to detect the ozone concentration of the ozone water that actually contacts the substrate W.
- FIG. The concentration calculator 102 calculates the ozone concentration of the ozonated water based on the color information of the ozonated water acquired by the image processing unit 101 . Note that it is also possible to use the color information itself as an index representing the ozone concentration without calculating the ozone concentration.
- the first imaging control unit 103 captures an image of the ozonated water with the imaging device 88 after accumulating the ozonated water in the treatment tank 63 and before immersing the plurality of substrates W in the ozonized water.
- the first determination unit 104 determines whether or not to immerse the substrate W in the ozone water based on the color information of the ozone water acquired by the image processing unit 101 .
- the substrate W is immersed in ozone water in which the color information or the ozone concentration calculated from the color information is within a set range.
- the discharge unit 85 discharges the ozonated water from the treatment tank 63 and the supply unit 70 supplies new ozonated water to the treatment tank 63 . Quality deterioration of the substrate W due to abnormal ozone concentration can be suppressed.
- the second imaging control unit 105 captures an image of the ozonized water with the imaging device 88 while the plurality of substrates W are immersed in the ozonized water stored in the processing tank 63 .
- the second determination unit 106 determines whether or not the plurality of substrates W have been processed normally based on the color information of the ozonized water captured under the control of the second imaging control unit 105 . If the color information or the ozone concentration calculated from the color information is within the set range, it is determined that the processing is normal, and otherwise it is determined that the processing is abnormal. The processing quality of the substrate W can be easily determined.
- each functional block illustrated in FIG. 8 is conceptual and does not necessarily need to be physically configured as illustrated. All or part of the functional blocks shown in FIG. 8 can be functionally or physically distributed and integrated in arbitrary units. All or any part of each processing function performed by each functional block may be realized by a program executed by a CPU, or may be realized as hardware by wired logic.
- FIG. 9 to 11 the ozone water and the rinsing liquid are stored in order in one processing tank 63.
- the processing shown in FIG. 9 is performed under the control of the control unit 9 .
- the discharge unit 85 discharges the rinse liquid used in the previous batch process from the processing bath 63 (step S201).
- the supply unit 70 supplies ozone water to the treatment tank 63 (step S202). Even after the inner tank 63a of the treatment tank 63 is filled with ozonated water, the supply unit 70 continues to supply the ozonated water to the inner tank 63a so that the ozonated water in the inner tank 63a is not deactivated. The ozone water continues to overflow from the inner tank 63a to the outer tank 63b.
- the imaging device 88 images the ozone water stored in the inner tank 63a (step S203). This imaging is performed under the control of the first imaging control unit 103 .
- the imaging device 88 captures an image of the ozonated water
- the gas ejection nozzle 67 does not eject gas into the ozonated water. This is because the bubbling of the ozonated water can change the color information of the ozonated water.
- the imaging device 88 transmits the captured image to the control section 9 .
- the image processing unit 101 processes the image captured by the imaging device 88 and acquires the color information of the ozonated water (step S204).
- the concentration calculation unit 102 may calculate the ozone concentration of the ozonated water based on the color information of the ozonized water acquired by the image processing unit 101 .
- the first determination unit 104 determines whether or not to immerse the substrate W in ozone water based on the color information of the ozone water acquired by the image processing unit 101 (step S205). If the color information or the ozone concentration calculated from the color information is within the set range, the first determination unit 104 determines that immersion is possible. Subsequently, the driving device 65 lowers the substrate holding part 64 to immerse the plurality of substrates W held by the substrate holding part 64 in the ozone water stored in the inner tank 63a (step S206).
- the first determination unit 104 determines that immersion is not possible.
- the discharge unit 85 discharges the ozonized water from the inner tank 63a
- the supply unit 70 supplies new ozonated water to the inner tank 63a
- the first determination unit 104 again determines whether the immersion is possible.
- the processing of the substrate W is interrupted and maintenance is performed.
- step S207 the gas discharge nozzle 67 starts discharging gas.
- the discharged gas increases the flow rate of the ozonated water and causes the ozonated water to reach the resist residue before the ozonized water is deactivated. Thereby, the removal efficiency of the resist residue can be improved.
- the start of gas discharge may be performed after imaging the ozone water (step S203).
- the second imaging control unit 105 may image the ozonized water with the imaging device 88 while the plurality of substrates W are immersed in the ozonized water stored in the inner tank 63a. .
- the second determination unit 106 determines whether or not the plurality of substrates W have been processed normally based on the color information of the ozonized water captured under the control of the second imaging control unit 105 .
- step S206 When the elapsed time from the immersion of the substrate W (step S206) reaches the set time, the supply unit 70 stops supplying ozone water to the inner tank 63a, and the gas ejection nozzle 67 stops ejecting gas (step S208). ).
- the discharge unit 85 discharges the ozone water from the inner tank 63a (step S209).
- the nozzle 68 may supply a rinse liquid in the form of a shower or mist to the substrate W from above so that the substrate W is not dried while the liquid level of the ozone water is lowered. During this time, the substrate W is accommodated inside the inner bath 63a.
- the supply unit 70 supplies the rinse liquid to the inner tank 63a (step S210).
- the nozzle 68 may supply a rinse liquid in the form of a shower or mist to the substrate W from above so that the substrate W does not dry while the liquid level of the rinse liquid rises. During this time, the substrate W is accommodated inside the inner bath 63a.
- the supply unit 70 continues to supply the inner tank 63a with the rinse liquid, and the supply unit 70 continues to overflow the rinse liquid from the inner tank 63a to the outer tank 63b.
- the rinsing liquid removes ozone water remaining on the substrate W.
- FIG. The supply of the rinsing liquid is continued for the set time.
- the driving device 65 raises the substrate holding portion 64 and pulls up the plurality of substrates W held by the substrate holding portion 64 from the rinse liquid stored in the inner tank 63a.
- the transport unit 52 unloads the substrate W (step S211).
- the substrates W may be carried out one by one by the transport unit 52 in a state of being immersed in the rinsing liquid.
- One processing tank 63 is a chemical liquid tank that stores ozone water.
- Another processing tank 63 is a rinse tank that stores a rinse liquid. The processing shown in FIG. 12 is performed under the control of the control unit 9 .
- the chemical tank is configured such that the circulation path 71 returns the ozone water taken out from the outer tank 63b to the inner tank 63a.
- the supply unit 70 continues to circulate the ozone water (step S301).
- the rinse tank is on standby with the rinse liquid stored in the inner tank 63a, and the overflow of the rinse liquid is stopped.
- Steps S302 to S307 are the same as steps S203 to S208 in FIG. 9, so description thereof will be omitted. However, in step S307, unlike step S208 in FIG. 9, the circulation of ozonated water is continued without stopping the supply of ozonated water.
- the driving device 65 raises the substrate holding portion 64 to lift the plurality of substrates W held by the substrate holding portion 64 out of the ozone water stored in the inner tank 63a.
- a plurality of substrates W are unloaded by, for example, the third transport device 62 (step S308).
- the third transfer device 62 transfers the plurality of substrates to the substrate holding unit 64 waiting above the rinse bath.
- the driving device 65 moves not only the substrate holder 64 vertically but also horizontally (for example, in the X-axis direction) to transport a plurality of substrates W between the chemical bath and the rinse bath. You can move it.
- the rinse liquid starts overflowing in the rinse tank (step S401).
- the overflow of the rinse liquid (step S401) may be performed before the substrate W is immersed in the rinse liquid (step S402).
- the driving device 65 lowers the substrate holding part 64 to immerse the plurality of substrates W held by the substrate holding part 64 in the rinse liquid stored in the inner tank 63a (step S402). ).
- the rinsing liquid removes ozone water remaining on the substrate W.
- FIG. Rinse overflow continues for a set time.
- step S403 overflow of the rinse liquid is stopped (step S403).
- the driving device 65 raises the substrate holding part 64 to pull up the plurality of substrates W held by the substrate holding part 64 from the rinse liquid stored in the inner tank 63a.
- the transport unit 52 unloads the substrate W (step S404).
- the substrates W may be carried out one by one by the transport unit 52 in a state of being immersed in the rinsing liquid.
- Substrate Processing System 3 Single Wafer Processing Section 52 Transfer Section 6 Batch Processing Section 63 Processing Tank W Substrate
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Abstract
Description
3 枚葉処理部
52 搬送部
6 バッチ処理部
63 処理槽
W 基板
Claims (11)
- 処理槽に貯留されているオゾン水に複数枚の基板を浸漬することで、複数枚の前記基板を一括で処理するバッチ処理部と、
前記基板を1枚ずつ薬液で処理する枚葉処理部と、
前記バッチ処理部から前記枚葉処理部に前記基板を濡れたまま搬送する搬送部と、
を備える、基板処理システム。 - 前記処理槽に貯留されている前記オゾン水を撮像する撮像装置と、
前記撮像装置により撮像した画像を処理し、前記オゾン水の色情報を取得する画像処理部と、
前記画像処理部で取得した前記オゾン水の色情報に基づいて前記オゾン水のオゾン濃度を算出する濃度算出部と、
を備える、請求項1に記載の基板処理システム。 - 前記処理槽に貯留されている前記オゾン水を撮像する撮像装置と、
前記撮像装置により撮像した画像を処理し、前記オゾン水の色情報を取得する画像処理部と、
前記画像処理部で取得した前記オゾン水の色情報に基づいて前記オゾン水に前記基板を浸漬するか否かを判断する第1判断部と、
を備える、請求項1に記載の基板処理システム。 - 前記処理槽に前記オゾン水を溜めた後、前記オゾン水に複数枚の前記基板を浸漬する前に、前記撮像装置によって前記オゾン水を撮像する第1撮像制御部を備える、請求項2又は3に記載の基板処理システム。
- 前記処理槽に貯留されている前記オゾン水に複数枚の前記基板を浸漬している間に、前記撮像装置によって前記オゾン水を撮像する第2撮像制御部と、
前記第2撮像制御部による制御下で撮像した前記オゾン水の色情報に基づいて、複数枚の前記基板に対する処理が正常に行われたか否かを判断する第2判断部と、
を備える、請求項2又は3に記載の基板処理システム。 - 各前記基板には、レジスト残渣が付いており、
前記オゾン水は、前記レジスト残渣を酸化させ、
前記薬液は、前記オゾン水で酸化された前記レジスト残渣を溶解して除去する、請求項1に記載の基板処理システム。 - 前記バッチ処理部は、前記オゾン水を循環させる循環路と、前記循環路にオゾンガスを供給するオゾンガス供給部と、前記循環路で前記オゾン水を加圧する加圧装置と、前記循環路で前記オゾン水を冷却する冷却装置と、を含む、請求項1~3および6のいずれか1項に記載の基板処理システム。
- バッチ処理部において、処理槽に貯留されているオゾン水に複数枚の基板を浸漬することで、複数枚の前記基板を一括で処理することと、
前記バッチ処理部から枚葉処理部に前記基板を濡れたまま搬送することと、
前記枚葉処理部において、前記基板を1枚ずつ薬液で処理することと、
を有する、基板処理方法。 - 前記処理槽に貯留されている前記オゾン水に複数枚の前記基板を浸漬する前に、前記処理槽に貯留されている前記オゾン水を撮像装置で撮像することと、
前記撮像装置により撮像した画像を画像処理部によって処理し、前記オゾン水の色情報を取得することと、
前記画像処理部で取得した前記オゾン水の色情報が予め設定された条件を満たす場合に、前記処理槽に貯留されている前記オゾン水に複数枚の前記基板を浸漬することと、
を有する、請求項8に記載の基板処理方法。 - 前記処理槽に貯留されている前記オゾン水に複数枚の前記基板を浸漬している間に、前記処理槽に貯留されている前記オゾン水を撮像装置で撮像することと、
前記撮像装置により撮像した画像を画像処理部によって処理し、前記オゾン水の色情報を取得することと、
前記画像処理部で取得した前記オゾン水の色情報が予め設定された条件を満たすか否かで、複数枚の前記基板に対する処理が正常に行われたか否かを判断することと、
を有する、請求項8に記載の基板処理方法。 - 各前記基板には、レジスト残渣が付いており、
前記オゾン水は、前記レジスト残渣を酸化させ、
前記薬液は、前記オゾン水で酸化された前記レジスト残渣を溶解して除去する、請求項8に記載の基板処理方法。
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