WO2022196470A1 - 機能性水溶液供給装置 - Google Patents
機能性水溶液供給装置 Download PDFInfo
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- WO2022196470A1 WO2022196470A1 PCT/JP2022/010167 JP2022010167W WO2022196470A1 WO 2022196470 A1 WO2022196470 A1 WO 2022196470A1 JP 2022010167 W JP2022010167 W JP 2022010167W WO 2022196470 A1 WO2022196470 A1 WO 2022196470A1
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- WIPO (PCT)
- Prior art keywords
- water
- storage tank
- aqueous solution
- washing
- functional aqueous
- Prior art date
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- 239000007864 aqueous solution Substances 0.000 title claims abstract description 69
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 297
- 238000003860 storage Methods 0.000 claims abstract description 102
- 238000004519 manufacturing process Methods 0.000 claims abstract description 76
- 238000004140 cleaning Methods 0.000 claims description 92
- 239000000126 substance Substances 0.000 claims description 80
- 230000033116 oxidation-reduction process Effects 0.000 claims description 48
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical group N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 44
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical group OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 42
- 229910021529 ammonia Inorganic materials 0.000 claims description 22
- 239000007788 liquid Substances 0.000 claims description 10
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 claims 1
- 238000005406 washing Methods 0.000 abstract description 107
- 229910021642 ultra pure water Inorganic materials 0.000 abstract description 35
- 239000012498 ultrapure water Substances 0.000 abstract description 35
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 20
- 230000000052 comparative effect Effects 0.000 description 18
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 8
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 8
- 239000001569 carbon dioxide Substances 0.000 description 6
- 229910002092 carbon dioxide Inorganic materials 0.000 description 6
- 239000001257 hydrogen Substances 0.000 description 5
- 229910052739 hydrogen Inorganic materials 0.000 description 5
- 239000007789 gas Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 235000012431 wafers Nutrition 0.000 description 4
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 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
- 239000002245 particle Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 235000019253 formic acid Nutrition 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67017—Apparatus for fluid treatment
- H01L21/67028—Apparatus for fluid treatment for cleaning followed by drying, rinsing, stripping, blasting or the like
- H01L21/6704—Apparatus for fluid treatment for cleaning followed by drying, rinsing, stripping, blasting or the like for wet cleaning or washing
-
- 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
- B08B3/08—Cleaning involving contact with liquid the liquid having chemical or dissolving effect
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/008—Control or steering systems not provided for elsewhere in subclass C02F
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/68—Treatment of water, waste water, or sewage by addition of specified substances, e.g. trace elements, for ameliorating potable water
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/70—Treatment of water, waste water, or sewage by reduction
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/02—Non-contaminated water, e.g. for industrial water supply
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
Definitions
- the present invention relates to a device for supplying a functional aqueous solution as cleaning water to a point of use such as a cleaning device for electronic components and electronic members used in the electronic industry, etc., and more particularly to a device for supplying a functional aqueous solution as cleaning water to a plurality of functional aqueous solutions as cleaning water.
- the present invention relates to a functional aqueous solution supply device capable of efficiently supplying a point of use having a washing machine.
- Patent Document 1 proposes a system in which a storage tank is provided for the purpose of saving water, and the functional aqueous solution not used in the washing machine is returned to the storage tank and circulated.
- the adjusted functional aqueous solution is replenished to the storage tank, and at this time, in order to stabilize the concentration of the replenished functional aqueous solution, the flow rate of the replenishing water is kept constant. Therefore, even when the functional aqueous solution is not replenished to the storage tank, it is necessary to continue producing the functional aqueous solution as make-up water and discharge the surplus as drain water, resulting in a small water-saving effect. Especially when the point of use has a plurality of single-wafer type wafer cleaning machines, the amount of cleaning water to be used fluctuates greatly, resulting in a large amount of drain water to be discharged.
- the present invention supplies wash water to a point of use, in which at least one functional component selected from conductivity-imparting substances, oxidation-reduction potential adjusting substances, and pH adjusting substances is added to raw water.
- a functional aqueous solution supply device comprising: a supplementary water producing unit for producing the cleaning water; a storage tank for supplying, replenishing and storing the cleaning water produced by the supplementary water producing unit; and the use point from the storage tank a circulating washing water supply pipe that supplies washing water to the point of use; a return pipe that returns unused washing water at the point of use to the circulating washing water supply pipe; (Invention 1).
- the discharge amount of the functional aqueous solution can be greatly reduced. can be reduced.
- the production amount of the functional aqueous solution can also be reduced.
- the production amount of the functional aqueous solution can be set in advance according to the required amount based on the amount of replenishment of the cleaning water supplied from the replenishing water production unit to the storage tank based on the scheduled use information of the cleaning liquid. , the concentration of the functional aqueous solution can be precisely controlled.
- the point of use has a plurality of washing machines (invention 2).
- invention 2 although the amount of cleaning liquid used at the point of use varies greatly depending on the operating status of a plurality of cleaning machines, the operating information of this cleaning machine is obtained in advance and the cleaning liquid to be used at the point of use is determined. By estimating the amount of in advance and controlling the production/replenishment amount thereof, it is possible to greatly reduce the discharge amount of the functional aqueous solution and also reduce the production amount of the functional aqueous solution. Also, the concentration of the functional aqueous solution can be controlled with high accuracy.
- the conductivity imparting substance is preferably ammonia or carbonic acid (invention 3).
- invention 3 it can be particularly suitably applied when a very small amount of ammonia or carbonic acid is dissolved.
- the oxidation-reduction potential adjusting substance is preferably hydrogen peroxide, O 3 or H 2 (invention 4).
- invention 4 it is particularly suitable for dissolving a small amount of hydrogen peroxide and O 3 .
- the functional aqueous solution supply device of the present invention it is possible to control the supply amount of the cleaning water supplied from the supplementary water production unit to the storage tank based on the usage plan information of the cleaning solution of the point of use.
- the amount of aqueous solution discharged can be greatly reduced, and the production amount of functional aqueous solution can also be reduced.
- the concentration of the functional aqueous solution can be accurately controlled by setting the replenishment amount of the cleaning water to be supplied from the replenishing water production unit to the storage tank based on the usage schedule information of the cleaning liquid.
- the amount of cleaning liquid used at a point of use fluctuates greatly depending on the operating conditions of a plurality of cleaning machines.
- FIG. 1 is a schematic diagram showing a functional aqueous solution supply device according to an embodiment of the present invention
- FIG. It is a schematic diagram showing a conventional functional aqueous solution supply device.
- FIG. 1 shows a functional aqueous solution supply device according to one embodiment of the present invention, and in FIG. etc. to produce cleaning water W1 and supply it to a cleaning machine for semiconductor wafers as a point of use.
- a reservoir 5 to which the produced washing water W1 is supplied and replenished through a pipe 4; and a circulation line 7 for supplying unused washing water W1 to the single-wafer type washing machines 6A, 6B, 6C and 6D and returning the unused washing water W1 to the storage tank 5.
- the circulation pipe 7 is branched into supply pipes 7A, 7B, 7C, and 7D for supplying washing water W1 to the washing machines 6A, 6B, .
- Communicating return pipes 8A, 8B, 8C and 8D connect respectively. Operation plans of the washers 6A, 6B, .
- 10 is a drain pipe for discharging the drain water DW.
- the ultrapure water W to be raw water is, for example, resistivity: 18.1 M ⁇ cm or more, fine particles: 1000 particles / L or less with a particle size of 50 nm or more, viable bacteria: 1 particle / L or less, TOC (Total Organic Carbon): 1 ⁇ g/L or less Total silicon: 0.1 ⁇ g/L or less Metals: 1 ng/L or less Ions: 10 ng/L or less Hydrogen peroxide: 30 ⁇ g/L or less Water temperature: 25 ⁇ 2° C. is preferred.
- the pH adjusting substance is not particularly limited, and when adjusting the pH to less than 7, liquids such as citric acid, formic acid, and hydrochloric acid, and gases such as CO 2 can be used. Moreover, when adjusting to pH 7 or more, ammonia, sodium hydroxide, potassium hydroxide, etc. can be used. These pH-adjusting substances also function as conductivity-imparting substances when added in very small amounts.
- the oxidation - reduction potential adjusting substance is not particularly limited.
- a gas body such as can be used.
- a liquid such as oxalic acid or a gas such as hydrogen (H 2 ) can be used to adjust the oxidation-reduction potential to the negative side.
- ultrapure water W is supplied to the make-up water production unit 3, and at least one selected from a conductivity-imparting substance, an oxidation-reduction potential adjusting substance, and a pH-adjusting substance is added to make washing water in the make-up water production unit 3.
- (Functional aqueous solution) W1 is produced.
- This functional aqueous solution W1 is once stored in the storage tank 5 from the pipe 4, and once a predetermined amount of washing water W1 is stored, a liquid feed pump (not shown) is driven, and the circulation pipe 7 is supplied to the supply pipes 7A, 7B, 7C and Washing water W1 is supplied to washing machines 6A, 6B, . . . via 7D.
- the cleaning water W1 not used in the single-wafer cleaning machines 6A, 6B, 6C, and 6D is returned to the storage tank 5 through the return pipes 8A, 8B, 8C, and 8D to the circulation pipe 7.
- the washing water W1 returned at this time was in a state in which the dissolved oxygen was increased by coming into contact with the air in the single-wafer washing machines 6A, 6B, 6C, 6D, etc., so the dissolved oxygen was removed as necessary. You can send it back later.
- the wash water W1 produced by the make-up water producing unit 3 is supplied to the storage tank 5 through the pipe 4.
- operation information of the washing machines 6A, 6B, . . . is obtained in advance. Based on this operating information, the amount of cleaning water W1 used is predicted by the control means 9, and the amount of cleaning water W1 produced by the replenishing water producing section 3 is set according to this usage amount. Washing water W1 is supplied to the storage tank 5 according to the fluctuation. As a result, it is possible to reduce the production amount of the washing water W1, and also to significantly reduce the discharge amount of the washing water W1. Moreover, it is possible to accurately control the concentration of the cleaning liquid of the cleaning water W1.
- the average flow rate of drain water was 110 mL/min. Further, the variation in the ammonia concentration of the cleaning water W1 sent from the storage tank 5 to the cleaning machines 6A, 6B, . . . was ⁇ 10%, and the variation in the hydrogen peroxide concentration was also ⁇ 10%.
- Table 1 shows whether or not the make-up water production unit is controlled in Comparative Example 1, the conductivity imparting substance and its set value, and the oxidation-reduction potential adjusting substance and its set concentration.
- Table 2 shows the variation rate of conductivity, the variation rate of the concentration of the oxidation-reduction potential adjusting substance, and the average drain water flow rate.
- the average flow rate of drain water was 110 L/min. Further, the variation in the ammonia concentration of the cleaning water W1 sent from the storage tank 5 to the cleaning machines 6A, 6B, . . . was ⁇ 10%, and the variation in the hydrogen peroxide concentration was also ⁇ 10%.
- Table 1 shows whether or not the make-up water production unit is controlled, the conductivity-imparting substance and its set value, and the oxidation-reduction potential adjusting substance and its set concentration in Comparative Example 2.
- Table 2 also shows the variation rate of the conductivity, the variation rate of the concentration of the oxidation-reduction potential adjusting substance, and the average drain water flow rate.
- the average flow rate of drain water was 110 L/min. Further, the variation in the ammonia concentration of the cleaning water W1 sent from the storage tank 5 to the cleaning machines 6A, 6B, . . . was ⁇ 10%, and the variation in the ozone concentration was also ⁇ 10%.
- Table 1 shows the presence or absence of control of the make-up water production unit in Comparative Example 3, the conductivity imparting substance and its set value, and the oxidation-reduction potential adjusting substance and its set concentration.
- Table 2 also shows the variation rate of the conductivity, the variation rate of the concentration of the oxidation-reduction potential adjusting substance, and the average drain water flow rate.
- the average flow rate of drain water was 110 L/min. Further, the variation in the ammonia concentration of the cleaning water W1 sent from the storage tank 5 to the cleaning machines 6A, 6B, . . . was ⁇ 10%, and the variation in the hydrogen concentration was also ⁇ 10%.
- Table 1 shows the presence or absence of control of the make-up water production unit in Comparative Example 4, the conductivity imparting substance and its set value, and the oxidation-reduction potential adjusting substance and its set concentration.
- Table 2 also shows the variation rate of the conductivity, the variation rate of the concentration of the oxidation-reduction potential adjusting substance, and the average drain water flow rate.
- the average flow rate of drain water was 110 L/min. Further, the variations in the carbonic acid concentration of the washing water W1 sent from the storage tank 5 to the washing machines 6A, 6B, . . . were ⁇ 10%, and the variations in the hydrogen peroxide concentration were also ⁇ 10%.
- Table 1 shows whether or not the make-up water production unit is controlled, the conductivity-imparting substance and its set value, and the oxidation-reduction potential adjusting substance and its set concentration in Comparative Example 5.
- Table 2 also shows the variation rate of the conductivity, the variation rate of the concentration of the oxidation-reduction potential adjusting substance, and the average drain water flow rate.
- the average flow rate of drain water was 110 L/min. Further, the variation in carbonic acid concentration of washing water W1 sent from storage tank 5 to washing machines 6A, 6B, . . . was ⁇ 10%, and the variation in ozone concentration was also ⁇ 10%.
- Table 1 shows the presence or absence of control of the make-up water production unit in Comparative Example 6, the conductivity imparting substance and its set value, and the oxidation-reduction potential adjusting substance and its set concentration.
- Table 2 also shows the variation rate of the conductivity, the variation rate of the concentration of the oxidation-reduction potential adjusting substance, and the average drain water flow rate.
- the average flow rate of drain water was 110 L/min. Further, the variations in the carbonic acid concentration of the cleaning water W1 sent from the storage tank 5 to the cleaning machines 6A, 6B, . . . were ⁇ 10%, and the variations in the hydrogen concentration were also ⁇ 10%.
- Table 1 shows whether or not the make-up water production unit is controlled, conductivity-imparting substances and their set values, oxidation-reduction potential adjusting substances and their set concentrations in Comparative Example 7.
- Table 2 also shows the variation rate of the conductivity, the variation rate of the concentration of the oxidation-reduction potential adjusting substance, and the average drain water flow rate.
- the average flow rate of drain water was 0 L/min.
- the variation in the concentration of ammonia in the cleaning water W1 sent from the storage tank 5 to the cleaning machines 6A, 6B, . . . was ⁇ 200%, and the variation in the concentration of hydrogen peroxide was ⁇ 100%. From these facts, it was found that although the amount of drain water was small, the variation in concentration was large and it was not practical.
- Table 1 shows the presence or absence of control of the make-up water production unit, conductivity-imparting substances and their set values, oxidation-reduction potential adjusting substances and their set concentrations in Comparative Example 8.
- Table 2 also shows the variation rate of the conductivity, the variation rate of the concentration of the oxidation-reduction potential adjusting substance, and the average drain water flow rate.
- the average flow rate of drain water was 0 L/min.
- the variation in the ammonia concentration of the washing water W1 sent from the storage tank 5 to the washing machines 6A, 6B, . . . was ⁇ 80%, and the variation in the hydrogen peroxide concentration was ⁇ 100%. From these facts, it was found that although the amount of drain water was small, the variation in concentration was large and it was not practical.
- Table 1 shows whether or not the make-up water production unit is controlled, the conductivity-imparting substance and its set value, and the oxidation-reduction potential adjusting substance and its set concentration in Comparative Example 9.
- Table 2 also shows the variation rate of the conductivity, the variation rate of the concentration of the oxidation-reduction potential adjusting substance, and the average drain water flow rate.
- Example 1 Using the functional aqueous solution supply device 1 shown in FIG. ) was added, and hydrogen peroxide (oxidation-reduction potential adjusting substance) was added so as to be 100 ppm to produce washing water (functional aqueous solution) W1, which was sent to the storage tank 5.
- the washing water W1 was sent from the storage tank 5 to the four washing machines 6A, 6B, 6C and 6D, and the unused washing water W1 was returned to the storage tank 5.
- Data on the amount of cleaning water W1 used is calculated in advance by the control means 9 from the operating information of the washing machines 6A, 6B, 6C and 6D, and the make-up water producing section 3 is controlled based on the data on the amount of cleaning water W1 used. Then, the production amount of the wash water W1 in the replenishment water producing section 3 was adjusted according to this usage amount. At this time, excess cleaning water W1 was discharged as drain water.
- the average flow rate of drain water was 30 L/min. Further, the variation in the ammonia concentration of the cleaning water W1 sent from the storage tank 5 to the cleaning machines 6A, 6B, . . . was ⁇ 10%, and the variation in the hydrogen peroxide concentration was also ⁇ 10%.
- Table 1 shows the presence or absence of control of the make-up water production unit in Example 1, the conductivity imparting substance and its set value, and the oxidation-reduction potential adjusting substance and its set concentration.
- Table 2 also shows the variation rate of the conductivity, the variation rate of the concentration of the oxidation-reduction potential adjusting substance, and the average drain water flow rate.
- Example 2 Using the functional aqueous solution supply device 1 shown in FIG. 1, ultrapure water W is supplied to the makeup water production unit 3, ammonia is added to this ultrapure water W so that the conductivity is 100 ⁇ S / cm, and further Hydrogen peroxide was added to 100 ppm to produce washing water W1, which was sent to the storage tank 5.
- the washing water W1 was sent from the storage tank 5 to the four washing machines 6A, 6B, 6C and 6D, and the unused washing water W1 was returned to the storage tank 5.
- Data on the amount of cleaning water W1 used is calculated in advance by the control means 9 from the operating information of the washing machines 6A, 6B, 6C and 6D, and the make-up water producing section 3 is controlled based on the data on the amount of cleaning water W1 used. Then, the production amount of the wash water W1 in the replenishment water producing section 3 was adjusted according to this usage amount. At this time, excess cleaning water W1 was discharged as drain water.
- the average flow rate of drain water was 30 L/min. Further, the variation in the ammonia concentration of the cleaning water W1 sent from the storage tank 5 to the cleaning machines 6A, 6B, . . . was ⁇ 10%, and the variation in the hydrogen peroxide concentration was also ⁇ 10%.
- Table 1 shows the presence/absence of control of the make-up water production unit in Example 2, the conductivity-imparting substance and its set value, and the oxidation-reduction potential adjusting substance and its set concentration.
- Table 2 also shows the variation rate of the conductivity, the variation rate of the concentration of the oxidation-reduction potential adjusting substance, and the average drain water flow rate.
- Example 3 Using the functional aqueous solution supply device 1 shown in FIG. 1, ultrapure water W is supplied to the makeup water production unit 3, ammonia is added to this ultrapure water W so that the conductivity is 100 ⁇ S / cm, and further Ozone (O 3 ) (oxidation-reduction potential adjusting substance) was added to 30 ppm to produce cleaning water W1, which was sent to the storage tank 5 .
- O 3 oxidation-reduction potential adjusting substance
- Data on the amount of cleaning water W1 used is calculated in advance by the control means 9 from the operating information of the washing machines 6A, 6B, 6C and 6D, and the make-up water producing section 3 is controlled based on the data on the amount of cleaning water W1 used. Then, the production amount of the wash water W1 in the replenishment water producing section 3 was adjusted according to this usage amount. At this time, excess cleaning water W1 was discharged as drain water.
- the average flow rate of drain water was 30 L/min. Further, the variation in the ozone concentration of the cleaning water W1 sent from the storage tank 5 to the cleaning machines 6A, 6B, . . . was ⁇ 10%, and the variation in the hydrogen peroxide concentration was also ⁇ 10%.
- Table 1 shows whether or not the make-up water production unit is controlled, conductivity-imparting substances and their set values, oxidation-reduction potential adjusting substances and their set concentrations in Example 3.
- Table 2 also shows the variation rate of the conductivity, the variation rate of the concentration of the oxidation-reduction potential adjusting substance, and the average drain water flow rate.
- Example 4 Using the functional aqueous solution supply device 1 shown in FIG. 1, ultrapure water W is supplied to the makeup water production unit 3, ammonia is added to this ultrapure water W so that the conductivity is 100 ⁇ S / cm, and further Hydrogen gas (H 2 ) (oxidation-reduction potential adjusting substance) was added to 1.2 ppm to produce cleaning water W1, which was sent to the storage tank 5.
- the washing water W1 was sent from the storage tank 5 to the four washing machines 6A, 6B, 6C and 6D, and the unused washing water W1 was returned to the storage tank 5.
- Data on the amount of cleaning water W1 used is calculated in advance by the control means 9 from the operating information of the washing machines 6A, 6B, 6C and 6D, and the make-up water producing section 3 is controlled based on the data on the amount of cleaning water W1 used. Then, the production amount of the wash water W1 in the replenishment water producing section 3 was adjusted according to this usage amount. At this time, excess cleaning water W1 was discharged as drain water.
- the average flow rate of drain water was 30 L/min. Further, the variation in the ammonia concentration of the cleaning water W1 sent from the storage tank 5 to the cleaning machines 6A, 6B, . . . was ⁇ 10%, and the variation in the hydrogen concentration was also ⁇ 10%.
- Table 1 shows the presence or absence of control of the make-up water production unit, conductivity imparting substance and its set value, oxidation-reduction potential adjusting substance and its set concentration in Example 4.
- Table 2 also shows the variation rate of the conductivity, the variation rate of the concentration of the oxidation-reduction potential adjusting substance, and the average drain water flow rate.
- Example 5 Using the functional aqueous solution supply device 1 shown in FIG. 1, ultrapure water W is supplied to the makeup water production unit 3, and carbon dioxide (CO 2 ) is added to the ultrapure water W so that the conductivity is 10 ⁇ S / cm. (conductivity-imparting substance) was added, and hydrogen peroxide was further added so as to be 100 ppm to prepare washing water W1, which was sent to the storage tank 5.
- the washing water W1 was sent from the storage tank 5 to the four washing machines 6A, 6B, 6C and 6D, and the unused washing water W1 was returned to the storage tank 5.
- Data on the amount of cleaning water W1 used is calculated in advance by the control means 9 from the operating information of the washing machines 6A, 6B, 6C and 6D, and the make-up water producing section 3 is controlled based on the data on the amount of cleaning water W1 used. Then, the production amount of the wash water W1 in the replenishment water producing section 3 was adjusted according to this usage amount. At this time, excess cleaning water W1 was discharged as drain water.
- the average flow rate of drain water was 30 L/min. Further, the variations in the carbonic acid concentration of the washing water W1 sent from the storage tank 5 to the washing machines 6A, 6B, . . . were ⁇ 10%, and the variations in the hydrogen peroxide concentration were also ⁇ 10%.
- Table 1 shows the presence or absence of control of the make-up water production unit, the conductivity imparting substance and its set value, and the oxidation-reduction potential adjusting substance and its set concentration.
- Table 2 also shows the variation rate of the conductivity, the variation rate of the concentration of the oxidation-reduction potential adjusting substance, and the average drain water flow rate.
- Example 6 Using the functional aqueous solution supply device 1 shown in FIG. 1, ultrapure water W is supplied to the makeup water production unit 3, and carbon dioxide (CO 2 ) is added to the ultrapure water W so that the conductivity is 10 ⁇ S / cm. was added, and further ozone (O 3 ) was added to 30 ppm to produce cleaning water W 1 , which was sent to the storage tank 5 .
- the washing water W1 was sent from the storage tank 5 to the four washing machines 6A, 6B, 6C and 6D, and the unused washing water W1 was returned to the storage tank 5.
- Data on the amount of cleaning water W1 used is calculated in advance by the control means 9 from the operating information of the washing machines 6A, 6B, 6C and 6D, and the make-up water producing section 3 is controlled based on the data on the amount of cleaning water W1 used. Then, the production amount of the wash water W1 in the replenishment water producing section 3 was adjusted according to this usage amount. At this time, excess cleaning water W1 was discharged as drain water.
- the average flow rate of drain water was 30 L/min. Further, the variation in carbonic acid concentration of washing water W1 sent from storage tank 5 to washing machines 6A, 6B, . . . was ⁇ 10%, and the variation in ozone concentration was also ⁇ 10%.
- Table 1 shows whether or not the make-up water production unit is controlled, conductivity-imparting substances and their set values, oxidation-reduction potential adjusting substances and their set concentrations in Example 6.
- Table 2 also shows the variation rate of the conductivity, the variation rate of the concentration of the oxidation-reduction potential adjusting substance, and the average drain water flow rate.
- Example 7 Using the functional aqueous solution supply device 1 shown in FIG. 1, ultrapure water W is supplied to the makeup water production unit 3, and carbon dioxide (CO 2 ) is added to the ultrapure water W so that the conductivity is 10 ⁇ S / cm. was added, and further hydrogen gas (H 2 ) was added so as to be 1.2 ppm to produce washing water (functional aqueous solution) W1, which was sent to the storage tank 5.
- the washing water W1 was sent from the storage tank 5 to the four washing machines 6A, 6B, 6C and 6D, and the unused washing water W1 was returned to the storage tank 5.
- Data on the amount of cleaning water W1 used is calculated in advance by the control means 9 from the operating information of the washing machines 6A, 6B, 6C and 6D, and the make-up water producing section 3 is controlled based on the data on the amount of cleaning water W1 used. Then, the production amount of the wash water W1 in the replenishment water producing section 3 was adjusted according to this usage amount. At this time, excess cleaning water W1 was discharged as drain water.
- the average flow rate of drain water was 30 L/min. Further, the variations in the carbonic acid concentration of the cleaning water W1 sent from the storage tank 5 to the cleaning machines 6A, 6B, . . . were ⁇ 10%, and the variations in the hydrogen concentration were also ⁇ 10%.
- Table 1 also shows the presence or absence of control of the make-up water production unit, the conductivity imparting substance and its set value, and the oxidation-reduction potential adjusting substance and its set concentration in Example 7.
- Table 2 also shows the variation rate of the conductivity, the variation rate of the concentration of the oxidation-reduction potential adjusting substance, and the average drain water flow rate.
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Abstract
Description
図1は、本発明の一実施形態による機能性水溶液供給装置を示しており、図1において機能性水溶液供給装置1は、原料水としての超純水WにpH調整物質や酸化還元電位調整物質等を添加して洗浄水W1を製造し、ユースポイントとしての半導体ウエハの洗浄機に供給するためのものであり、超純水Wを管路2から供給して洗浄水W1としての機能性水溶液を製造する補給水製造部3と、製造された洗浄水W1が配管4を介して供給・補給される貯留槽5と、該貯留槽5から洗浄水W1をユースポイントとしての複数個(本実施形態においては4個)の枚葉式の洗浄機6A,6B,6C及び6Dに供給するとともに未使用の洗浄水W1を貯留槽5に返送する循環管路7とを有する。循環管路7は、それぞれの洗浄機6A,6B…に洗浄水W1を供給する供給管7A,7B,7C及び7Dがそれぞれ分岐していて、さらに洗浄機6A,6B…から循環管路7に連通する返送管8A,8B,8C及び8Dがそれぞれ接続している。そして、ユースポイントとしての洗浄機6A,6B…の運転計画は、あらかじめパーソナルコンピュータなどの制御手段9に伝達され、この制御手段9により補給水製造部3を制御可能となっている。なお、10はドレン水DWを排出するドレン配管である。
本実施形態において、原水となる超純水Wとは、例えば、抵抗率:18.1MΩ・cm以上、微粒子:粒径50nm以上で1000個/L以下、生菌:1個/L以下、TOC(Total Organic Carbon):1μg/L以下、全シリコン:0.1μg/L以下、金属類:1ng/L以下、イオン類:10ng/L以下、過酸化水素;30μg/L以下、水温:25±2℃のものが好適である。
本実施形態において、pH調整物質としては特に制限はなく、pH7未満に調整する場合には、クエン酸、ギ酸、塩酸などの液体やCO2などの気体を用いることができる。また、pH7以上に調整する場合には、アンモニア、水酸化ナトリウム、水酸化カリウム等を用いることができる。これらpH調整物質は、微量添加するだけで導電性付与物質としても機能する。
本実施形態において、酸化還元電位調整物質としては特に制限はないが、酸化還元電位を正側に調整するには、過酸化水素水などの液体やオゾンガス(O3)、酸素ガス(O2)などのガス体を用いることができる。また、酸化還元電位を負側に調整するにはシュウ酸などの液体や水素(H2)などのガス体を用いることができる。
前述したような構成を有する本実施形態の機能性水溶液供給装置1を用いた機能性水溶液W1の供給方法について以下説明する。
図2に示すように図1に示す機能性水溶液供給装置1において、補給水製造部3を制御する制御手段9を有せず、余剰の洗浄水W1をドレン配管10から排出する構成の機能性水溶液供給装置1を用意した。この機能性水溶液供給装置1を用いて、補給水製造部3に150L/分で超純水Wを供給し、この超純水Wに導電率が1μS/cmとなるようにアンモニア(導電性付与物質)を添加し、さらに過酸化水素(酸化還元電位調整物質)を100ppmとなるよう添加して洗浄水(機能性水溶液)W1を製造し、貯留槽5に送水した。貯留槽5から4台の洗浄機6A,6B,6C及び6Dにこの洗浄水W1を送水し、使用しなかった洗浄水W1は貯留槽5に戻した。貯留槽5のレベルが低い時は補給水製造部3からの洗浄水W1を補給し、レベルが高い時は補給水製造部3で製造した洗浄水W1を貯留槽5に入れずにドレン配管10からドレン水DWとして排出した。
図2に示す機能性水溶液供給装置1を用いて、補給水製造部3に150L/分で超純水Wを供給し、この超純水Wに導電率が100μS/cmとなるようにアンモニアを添加し、さらに過酸化水素を100ppmとなるよう添加して洗浄水W1を製造し、貯留槽5に送水した。貯留槽5から4台の洗浄機6A,6B,6C及び6Dにこの洗浄水W1を送水し、使用しなかった洗浄水W1は貯留槽5に戻した。貯留槽5のレベルが低い時は補給水製造部3からの洗浄水W1を補給し、レベルが高い時は補給水製造部3で製造した洗浄水W1を貯留槽5に入れずにドレン配管10からドレン水DWとして排出した。
図2に示す機能性水溶液供給装置1を用いて、補給水製造部3に150L/分で超純水Wを供給し、この超純水Wに導電率が100μS/cmとなるようにアンモニアを添加し、さらにオゾン(O3)(酸化還元電位調整物質)を30ppmとなるよう添加して洗浄水W1を製造し、貯留槽5に送水した。貯留槽5から4台の洗浄機6A,6B,6C及び6Dにこの洗浄水W1を送水し、使用しなかった洗浄水W1は貯留槽5に戻した。貯留槽5のレベルが低い時は補給水製造部3からの洗浄水W1を補給し、レベルが高い時は補給水製造部3で製造した洗浄水W1を貯留槽5に入れずにドレン配管10からドレン水DWとして排出した。
図2に示す機能性水溶液供給装置1を用いて、補給水製造部3に150L/分で超純水Wを供給し、この超純水Wに導電率が100μS/cmとなるようにアンモニアを添加し、さらに水素ガス(H2)(酸化還元電位調整物質)を1.2ppmとなるよう添加して洗浄水W1を製造し、貯留槽5に送水した。貯留槽5から4台の洗浄機6A,6B,6C及び6Dにこの洗浄水W1を送水し、使用しなかった洗浄水W1は貯留槽5に戻した。貯留槽5のレベルが低い時は補給水製造部3からの洗浄水W1を補給し、レベルが高い時は補給水製造部3で製造した洗浄水W1を貯留槽5に入れずにドレン配管10からドレン水DWとして排出した。
図2に示す機能性水溶液供給装置1を用いて、補給水製造部3に150L/分で超純水Wを供給し、この超純水Wに導電率が10μS/cmとなるように二酸化炭素(CO2)(導電性付与物質)を添加し、さらに過酸化水素を100ppmとなるよう添加して洗浄水W1を製造し、貯留槽5に送水した。貯留槽5から4台の洗浄機6A,6B,6C及び6Dにこの洗浄水W1を送水し、使用しなかった洗浄水W1は貯留槽5に戻した。貯留槽5のレベルが低い時は補給水製造部3からの洗浄水W1を補給し、レベルが高い時は補給水製造部3で製造した洗浄水W1を貯留槽5に入れずにドレン配管10からドレン水DWとして排出した。
図2に示す機能性水溶液供給装置1を用いて、補給水製造部3に150L/分で超純水Wを供給し、この超純水Wに導電率が10μS/cmとなるように二酸化炭素(CO2)を添加し、さらにオゾン(O3)を30ppmとなるよう添加して洗浄水W1を製造し、貯留槽5に送水した。貯留槽5から4台の洗浄機6A,6B,6C及び6Dにこの洗浄水W1を送水し、使用しなかった洗浄水W1は貯留槽5に戻した。貯留槽5のレベルが低い時は補給水製造部3からの洗浄水W1を補給し、レベルが高い時は補給水製造部3で製造した洗浄水W1を貯留槽5に入れずにドレン配管10からドレン水DWとして排出した。
図2に示す機能性水溶液供給装置1を用いて、補給水製造部3に150L/分で超純水Wを供給し、この超純水Wに導電率が10μS/cmとなるように二酸化炭素(CO2)を添加し、さらに水素ガス(H2)を1.2ppmとなるよう添加して洗浄水W1を製造し、貯留槽5に送水した。貯留槽5から4台の洗浄機6A,6B,6C及び6Dにこの洗浄水W1を送水し、使用しなかった洗浄水W1は貯留槽5に戻した。貯留槽5のレベルが低い時は補給水製造部3からの洗浄水W1を補給し、レベルが高い時は補給水製造部3で製造した洗浄水W1を貯留槽5に入れずにドレン配管10からドレン水DWとして排出した。
図2に示す機能性水溶液供給装置1を用いて、補給水製造部3に150L/分で超純水Wを供給し、この超純水Wに導電率が1μS/cmとなるようにアンモニアを添加し、さらに過酸化水素を100ppmとなるよう添加して洗浄水W1を製造し、貯留槽5に送水した。貯留槽5から4台の洗浄機6A,6B,6C及び6Dにこの洗浄水W1を送水し、使用しなかった洗浄水W1は貯留槽5に戻した。貯留槽5のレベルが低い時は補給水製造部3からの洗浄水W1を補給し、レベルが高い時は補給水製造部3での洗浄水W1の製造を停止した。
図2に示す機能性水溶液供給装置1を用いて、補給水製造部3に150L/分で超純水Wを供給し、この超純水Wに導電率が100μS/cmとなるようにアンモニアを添加し、さらに過酸化水素を100ppmとなるよう添加して洗浄水(機能性水溶液)W1を製造し、貯留槽5に送水した。貯留槽5から4台の洗浄機6A,6B,6C及び6Dにこの洗浄水W1を送水し、使用しなかった洗浄水W1は貯留槽5に戻した。貯留槽5のレベルが低い時は補給水製造部3からの洗浄水W1を補給し、レベルが高い時は補給水製造部3での洗浄水W1の製造を停止した。
図1に示す機能性水溶液供給装置1を用いて、補給水製造部3に超純水Wを供給し、この超純水Wに導電率が1μS/cmとなるようにアンモニア(導電性付与物質)を添加し、さらに過酸化水素(酸化還元電位調整物質)を100ppmとなるよう添加して洗浄水(機能性水溶液)W1を製造し、貯留槽5に送水した。貯留槽5から4台の洗浄機6A,6B,6C及び6Dにこの洗浄水W1を送水し、使用しなかった洗浄水W1は貯留槽5に戻した。そして、洗浄機6A,6B,6C及び6Dの稼働情報から制御手段9により予め洗浄水W1の使用量に関するデータ算出し、この洗浄水W1の使用量に関するデータに基づいて補給水製造部3を制御して、この使用量に応じて補給磯製造部3での洗浄水W1の製造量を調整した。この際、余剰の洗浄水W1はドレン水として排出した。
図1に示す機能性水溶液供給装置1を用いて、補給水製造部3に超純水Wを供給し、この超純水Wに導電率が100μS/cmとなるようにアンモニアを添加し、さらに過酸化水素を100ppmとなるよう添加して洗浄水W1を製造し、貯留槽5に送水した。貯留槽5から4台の洗浄機6A,6B,6C及び6Dにこの洗浄水W1を送水し、使用しなかった洗浄水W1は貯留槽5に戻した。そして、洗浄機6A,6B,6C及び6Dの稼働情報から制御手段9により予め洗浄水W1の使用量に関するデータ算出し、この洗浄水W1の使用量に関するデータに基づいて補給水製造部3を制御して、この使用量に応じて補給磯製造部3での洗浄水W1の製造量を調整した。この際、余剰の洗浄水W1はドレン水として排出した。
図1に示す機能性水溶液供給装置1を用いて、補給水製造部3に超純水Wを供給し、この超純水Wに導電率が100μS/cmとなるようにアンモニアを添加し、さらにオゾン(O3)(酸化還元電位調整物質)を30ppmとなるよう添加して洗浄水W1を製造し、貯留槽5に送水した。貯留槽5から4台の洗浄機6A,6B,6C及び6Dにこの洗浄水W1を送水し、使用しなかった洗浄水W1は貯留槽5に戻した。そして、洗浄機6A,6B,6C及び6Dの稼働情報から制御手段9により予め洗浄水W1の使用量に関するデータ算出し、この洗浄水W1の使用量に関するデータに基づいて補給水製造部3を制御して、この使用量に応じて補給磯製造部3での洗浄水W1の製造量を調整した。この際、余剰の洗浄水W1はドレン水として排出した。
図1に示す機能性水溶液供給装置1を用いて、補給水製造部3に超純水Wを供給し、この超純水Wに導電率が100μS/cmとなるようにアンモニアを添加し、さらに水素ガス(H2)(酸化還元電位調整物質)を1.2ppmとなるよう添加して洗浄水W1を製造し、貯留槽5に送水した。貯留槽5から4台の洗浄機6A,6B,6C及び6Dにこの洗浄水W1を送水し、使用しなかった洗浄水W1は貯留槽5に戻した。そして、洗浄機6A,6B,6C及び6Dの稼働情報から制御手段9により予め洗浄水W1の使用量に関するデータ算出し、この洗浄水W1の使用量に関するデータに基づいて補給水製造部3を制御して、この使用量に応じて補給磯製造部3での洗浄水W1の製造量を調整した。この際、余剰の洗浄水W1はドレン水として排出した。
図1に示す機能性水溶液供給装置1を用いて、補給水製造部3に超純水Wを供給し、この超純水Wに導電率が10μS/cmとなるように二酸化炭素(CO2)(導電性付与物質)を添加し、さらに過酸化水素を100ppmとなるよう添加して洗浄水W1を製造し、貯留槽5に送水した。貯留槽5から4台の洗浄機6A,6B,6C及び6Dにこの洗浄水W1を送水し、使用しなかった洗浄水W1は貯留槽5に戻した。そして、洗浄機6A,6B,6C及び6Dの稼働情報から制御手段9により予め洗浄水W1の使用量に関するデータ算出し、この洗浄水W1の使用量に関するデータに基づいて補給水製造部3を制御して、この使用量に応じて補給磯製造部3での洗浄水W1の製造量を調整した。この際、余剰の洗浄水W1はドレン水として排出した。
図1に示す機能性水溶液供給装置1を用いて、補給水製造部3に超純水Wを供給し、この超純水Wに導電率が10μS/cmとなるように二酸化炭素(CO2)を添加し、さらにオゾン(O3)を30ppmとなるよう添加して洗浄水W1を製造し、貯留槽5に送水した。貯留槽5から4台の洗浄機6A,6B,6C及び6Dにこの洗浄水W1を送水し、使用しなかった洗浄水W1は貯留槽5に戻した。そして、洗浄機6A,6B,6C及び6Dの稼働情報から制御手段9により予め洗浄水W1の使用量に関するデータ算出し、この洗浄水W1の使用量に関するデータに基づいて補給水製造部3を制御して、この使用量に応じて補給磯製造部3での洗浄水W1の製造量を調整した。この際、余剰の洗浄水W1はドレン水として排出した。
図1に示す機能性水溶液供給装置1を用いて、補給水製造部3に超純水Wを供給し、この超純水Wに導電率が10μS/cmとなるように二酸化炭素(CO2)を添加し、さらに水素ガス(H2)を1.2ppmとなるよう添加して洗浄水(機能性水溶液)W1を製造し、貯留槽5に送水した。貯留槽5から4台の洗浄機6A,6B,6C及び6Dにこの洗浄水W1を送水し、使用しなかった洗浄水W1は貯留槽5に戻した。そして、洗浄機6A,6B,6C及び6Dの稼働情報から制御手段9により予め洗浄水W1の使用量に関するデータ算出し、この洗浄水W1の使用量に関するデータに基づいて補給水製造部3を制御して、この使用量に応じて補給磯製造部3での洗浄水W1の製造量を調整した。この際、余剰の洗浄水W1はドレン水として排出した。
2 管路
3 補給水製造部
4 配管
5 貯留槽
6A,6B,6C,6D 枚葉式洗浄機(ユースポイント)
7 循環管路
7A,7B,7C,7D 供給管
8A,8B,8C,8D 返送管
9 制御手段
W 超純水
W1 洗浄水(機能性水溶液)
Claims (4)
- 原料水に対して、導電性付与物質、酸化還元電位調整物質およびpH調整物質から選ばれた1種以上の機能性成分を添加した洗浄水をユースポイントに供給する機能性水溶液供給装置であって、
前記洗浄水を製造する補給水製造部と、
前記補給水製造部で製造された洗浄水を供給・補給して貯留する貯留槽と
前記貯留槽から前記ユースポイントに洗浄水を供給する循環式の洗浄水供給管と、
前記ユースポイントで未使用の洗浄水を前記循環式の洗浄水供給管に返送する返送管と、
前記ユースポイントの前記洗浄液の使用予定情報に基づき前記補給水製造部から前記貯留槽に供給する洗浄水の補給量を制御する制御手段と
を備える、機能性水溶液供給装置。 - 前記ユースポイントが複数の洗浄機を有する、請求項1に記載の機能性水溶液供給装置。
- 前記導電性付与物質が、アンモニア又は炭酸である、請求項1又は2に記載の機能性水溶液供給装置。
- 前記酸化還元電位調整物質が、過酸化水素、O3もしくはH2である、請求項1又は2に記載の機能性水溶液供給装置。
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WO2020039764A1 (ja) * | 2018-08-23 | 2020-02-27 | 栗田工業株式会社 | 電子部品用洗浄水製造システム及び電子部品用洗浄水製造システムの運転方法 |
JP2020188151A (ja) * | 2019-05-15 | 2020-11-19 | 栗田工業株式会社 | 溶液製造装置及び濃度制御方法 |
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