WO2004100241A1 - 洗浄装置、洗浄システム及び洗浄方法 - Google Patents
洗浄装置、洗浄システム及び洗浄方法 Download PDFInfo
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- WO2004100241A1 WO2004100241A1 PCT/JP2004/004940 JP2004004940W WO2004100241A1 WO 2004100241 A1 WO2004100241 A1 WO 2004100241A1 JP 2004004940 W JP2004004940 W JP 2004004940W WO 2004100241 A1 WO2004100241 A1 WO 2004100241A1
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- Prior art keywords
- cleaning
- section
- liquid
- cleaned
- unit
- Prior art date
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- 238000000034 method Methods 0.000 title claims abstract description 53
- 238000005406 washing Methods 0.000 title abstract description 29
- 239000004065 semiconductor Substances 0.000 claims abstract description 32
- 230000007246 mechanism Effects 0.000 claims abstract description 7
- 238000004140 cleaning Methods 0.000 claims description 353
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 105
- 239000002245 particle Substances 0.000 claims description 79
- 239000007788 liquid Substances 0.000 claims description 71
- 239000000126 substance Substances 0.000 claims description 56
- 238000001035 drying Methods 0.000 claims description 36
- 238000003860 storage Methods 0.000 claims description 31
- 239000004094 surface-active agent Substances 0.000 claims description 20
- 238000012546 transfer Methods 0.000 claims description 12
- 239000007921 spray Substances 0.000 claims description 11
- 238000005507 spraying Methods 0.000 claims description 4
- 238000002347 injection Methods 0.000 abstract description 5
- 239000007924 injection Substances 0.000 abstract description 5
- 239000012530 fluid Substances 0.000 abstract description 4
- 239000000243 solution Substances 0.000 description 30
- 235000012431 wafers Nutrition 0.000 description 28
- 239000000872 buffer Substances 0.000 description 14
- 230000000694 effects Effects 0.000 description 11
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67017—Apparatus for fluid treatment
- H01L21/67028—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
-
- 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
- B08B3/02—Cleaning by the force of jets or sprays
- B08B3/022—Cleaning travelling work
Definitions
- the present invention relates to a technology for cleaning members (cleaning objects) used in the field of semiconductors, and is particularly used in fields where requirements for cleanliness levels are extremely strict, such as wafer manufacturers and semiconductor manufacturers (device manufacturers).
- the present invention relates to a cleaning device for a pea carrier used between storage containers and a cleaning method, a cleaning system having an excellent cleaning effect and a high working efficiency, and a cleaning method thereof.
- the so-called wafer carrier for handling wafers used in the manufacturing process of semiconductor devices which is used in the manufacturing process of wafers, must be kept in a clean state because it is in direct contact with wafers. .
- the wafer polished in the wafer manufacturing process is stored in a container and shipped to another company such as a device maker, the cleanliness of the container becomes a problem.
- Saddle makers and semiconductor makers devices makers
- the control of cleanliness for e-carriers and storage containers for storing semiconductor wafers used in the semiconductor field, such as in the semiconductor field, is strict, and the technology for cleaning the members used in these semiconductor fields is important. I have.
- the wafer storage container 12 is composed of a container body (or lower box) 14 that stores the wafer W and a lid 16 that closes the upper opening of the container body 14.
- a substrate storage cassette or an inner set 18 for storing a large number of wafers W is mounted in the container body 14.
- Reference numeral 20 denotes a packing (or gasket) attached to the peripheral edge of the upper opening of the container body 14, and 22 denotes a board holder (or retainer) attached above the board storage cassette 18. ). Disclosure of the invention
- the carrier cannot be held and transported directly, place the carrier storage container and its components in a container such as a basket, and proceed as above.
- Cleaning is performed by immersion in a cleaning tank containing a cleaning solution (pure water, chemical solution, etc.).
- a cleaning solution pure water, chemical solution, etc.
- cleaning with a brush, coupling in a cleaning tank, or cleaning with long sound waves may be performed.
- an organic solvent or the like may be used.
- An object of the present invention is to provide a cleaning apparatus, a cleaning system, and a cleaning method for a member used in the semiconductor field having excellent cleaning ability and high working efficiency.
- a cleaning apparatus of the present invention is a cleaning apparatus for cleaning a member used in the field of semiconductors, wherein a cleaning liquid in the form of a mist is sprayed from one or more nozzles on the member to be cleaned.
- a high-pressure injection mechanism is a cleaning apparatus for cleaning a member used in the field of semiconductors, wherein a cleaning liquid in the form of a mist is sprayed from one or more nozzles on the member to be cleaned.
- the particle diameter of the atomized cleaning liquid ejected in the cleaning apparatus of the present invention is 100 m or less.
- the size of the water droplet is about 0.5 to 1.0 mm in the conventional sharpening method, but in the present invention, the water is sprayed as a fine mist of about 100 to 100 m.
- mist-like cleaning liquid is injected by mixing a gas with a liquid cleaning liquid.
- a gas By atomizing by such a method, an atomized cleaning liquid having the above particle diameter can be effectively produced.
- the spray pressure of the mist-like cleaning liquid at this time is preferably about 0.3 MPa (about 0.2 to 0.4 MPa).
- the cleaning liquid to be sprayed pure water or various chemicals are used.
- pure water in a storage container for storing a semiconductor wafer, it is preferable to use pure water to which a surfactant is added.
- a cleaning system according to the present invention is a cleaning system for cleaning a member used in the field of semiconductors, comprising: a loader section for setting the member to be cleaned; an unloader section for collecting the member; A transfer stage that continuously transfers the member from the first section to the unloader section; and a cleaning section that cleans the member with a mist-like cleaning liquid is provided on the transfer stage. It is characterized in that it is transported by the stage and cleaned by the cleaning section.
- the cleaning device in the cleaning section it is preferable to use, for example, the above-described cleaning device of the present invention in which the cleaning liquid is sprayed at a high pressure.
- the cleaning section has a tunnel-shaped outer wall, and a transfer stage for transferring the member to be cleaned continuously from the loader section to the unloader section.
- the transfer stage is preferably a conveyor-type transfer device using a plurality of long ring-shaped narrow belts.
- the method of supplying the mist-like cleaning liquid is not limited to the vertical direction, but may be supplied from the side (left and right). However, if supplied from above and below, there is a sufficient cleaning effect. It is preferable to provide an air curtain between the loader section and the cleaning section of the cleaning system of the present invention. By doing so, it is possible to prevent water droplets generated in the cleaning section from going out of the cleaning system of the present invention.
- a plurality of cleaning units for cleaning with the mist-like cleaning liquid may be provided. If the plurality of cleaning sections are divided into at least a pre-cleaning section using pure water, a cleaning section using a chemical solution, and a rinsing section, the cleaning process can be performed effectively.
- each cleaning section is clearly distinguished, and the intrusion of liquid droplets, particularly the liquid droplets in the chemical liquid cleaning section, from entering the pre-cleaning section and the rinsing section can be suppressed.
- very fine water droplets adhere to the member to be cleaned, but as they pass through the water curtain, large water droplets are agglomerated and are easily removed.
- the cleaning liquid (pure water) supplied in the pre-cleaning section is preferably used by circulating the cleaning liquid (pure water) used in the rinsing section. By doing so, pure water can be used effectively, which leads to cost reduction.
- a drying unit that removes liquid adhering to the object to be cleaned by air after passing through the cleaning unit may be provided.
- the cleaning method of the present invention is a cleaning method for cleaning a member used in the field of semiconductors.
- the cleaning method includes spraying a mist-like cleaning liquid having a small particle diameter under high pressure onto the member to be cleaned.
- a wafer storage container for storing semiconductor wafers 18.
- Such a container has a complicated shape, but according to the cleaning method of the present invention, such a container can also be cleaned cleanly.
- particles of 0.5 m or less adhering to a member to be cleaned can be removed.
- particularly minute particles can be removed, and particles of 0.5 or less can be effectively removed.
- the cleaning conditions and the like in the method of the present invention may be appropriately set to optimum conditions.
- the particle size of the atomized cleaning liquid having a small particle size is 100 or less, and this is set to a pressure of 0.3 MP. By spraying at about a (about 0.2 to 0.4 MPa), cleaning can be performed effectively.
- FIG. 1 is a schematic side view showing the overall structure of the cleaning of the present invention.
- FIG. 2 is a schematic side view of the loader section in the cleaning of the present invention.
- FIG. 3 is a schematic top view of the loader section in the cleaning of the present invention.
- FIG. 4 is a schematic front view of a loader unit for cleaning according to the present invention.
- FIG. 5 is a schematic side view illustrating a pre-cleaning section in the cleaning of the present invention.
- FIG. 6 is a schematic front view of a pre-cleaning section in the cleaning of the present invention.
- FIG. 7 is a schematic side view illustrating a chemical cleaning section in the cleaning of the present invention.
- FIG. 8 is a schematic front view of a chemical cleaning section in the cleaning of the present invention.
- FIG. 9 is a schematic side view of a rinsing section in the cleaning system of the present invention.
- FIG. 10 is a schematic front view of a rinsing unit in the cleaning system of the present invention.
- FIG. 11 is a schematic side view of a drying unit in the cleaning system of the present invention.
- FIG. 12 is a schematic front view of a drying unit in the cleaning system of the present invention.
- FIG. 13 is a schematic side view of the unloader section in the cleaning system of the present invention.
- FIG. 14 is a schematic explanatory top view of the unloader section in the cleaning system of the present invention.
- FIG. 15 is a schematic explanatory view showing a supply flow of the cleaning liquid in the cleaning system of the present invention.
- FIG. 16 is a schematic explanatory view showing an air supply flow in the cleaning system of the present invention.
- FIG. 17 is a perspective view showing an example of the wafer storage container.
- FIG. 18 is a perspective view showing a state where the main body of the eaves storage container of FIG. 17 is opened upward.
- FIG. 19 is an exploded perspective view of the wafer storage container of FIG. BEST MODE FOR CARRYING OUT THE INVENTION
- FIGS. 1 to 16 in the accompanying drawings, but the illustrated examples are illustrative only, and various modifications may be made without departing from the technical idea of the present invention. It goes without saying that deformation is possible.
- FIG. 1 is a schematic side view showing the overall structure of the cleaning system of the present invention.
- FIG. 2 is a schematic side view of the mouth part in the cleaning system of the present invention.
- FIG. 3 is a schematic top view of the loader unit in the cleaning system of the present invention.
- FIG. 4 is a schematic front view of the mouth part in the cleaning system of the present invention.
- FIG. 5 is a schematic side view of a pre-cleaning section in the cleaning system of the present invention.
- FIG. 6 is a schematic front view of a pre-cleaning section in the cleaning system of the present invention.
- FIG. 7 is a schematic side view of a chemical liquid cleaning section in the cleaning system of the present invention.
- FIG. 8 is a schematic front view of a chemical cleaning section in the cleaning system of the present invention.
- FIG. 1 is a schematic side view showing the overall structure of the cleaning system of the present invention.
- FIG. 2 is a schematic side view of the mouth part in the cleaning system of the present invention.
- FIG. 9 is a schematic side view illustrating a rinsing part in the cleaning system of the present invention.
- FIG. 10 is a schematic front explanatory view of a rinsing section in the cleaning system of the present invention.
- FIG. 11 is a schematic side view of a drying unit in the cleaning system of the present invention.
- FIG. 12 is a schematic front view of the drying unit in the cleaning system of the present invention.
- FIG. 13 is a schematic side view of an unloader section in the cleaning system of the present invention.
- FIG. 14 is a schematic top view of the fan loader in the cleaning system of the present invention.
- reference numeral 30 denotes a cleaning system of the present invention, which cleans various members used in the semiconductor field where cleanliness is particularly problematic, for example, the members of the wafer storage container 12 described above.
- a system in which the above-mentioned member to be cleaned T is sent out from the loader unit 40, washed in the cleaning unit 50, and collected (or discharged to the next process) in the unloader unit 70. is there.
- the cleaning system 30 of the present invention mainly includes a loader section 40 for setting the object T to be cleaned and an opening for recovering the object T to be cleaned.
- Loading section 70 a transport stage 80 for continuously transporting the article T to be cleaned from the loader section 40 to the unloader section 70, and an article T to be washed in the middle of the transport stage 80.
- a cleaning section 50 for cleaning with mist-like cleaning liquids L1 and L2.
- reference numeral 60 denotes a drying unit, which removes the liquid adhering to the object T after passing through the cleaning unit 50 by air A. I do.
- the washing section 50 has a tunnel-shaped outer wall 51, and the article to be washed sent from the loader section 40 is washed while passing through the tunnel-shaped outer wall 51.
- a transfer means of a comparator system is used as the transfer stage 80 for continuously transferring the object T to be cleaned from the loader section 40 to the unloader section 70, so that the cleaning processing can be performed continuously.
- the conveyor stage 80 of the c- conveyor system which is capable of continuously and simultaneously cleaning semiconductor wafer storage containers and irregular-shaped components constituting them, is equipped with an unloader from the loader unit 40.
- the part 70 may have a structure divided into a plurality of blocks, and may be a long ring-shaped thin member made of synthetic resin such as polyurethane or synthetic rubber. It has a belt-like transport section in which a plurality of width belts 80a are wound around a number of rollers 81 at intervals of several centimeters, and this long ring-shaped narrow belt 80a is connected to a gear (not shown). It is rotated by a drive unit such as a motor through a box so that the object to be cleaned can be transported on it.
- a drive unit such as a motor
- the cleaning unit 50 has an injection mechanism in which a plurality of nozzles 52 a, 54 a, and 56 a inject a mist cleaning liquid at a high pressure. It is a washing
- the nozzles 52a, 54a, 56a are arranged in the vertical direction.
- the arrangement of the nozzles 52a, 54a and 56a is not particularly limited, and may be arranged only on the side surface or on the side surface and up and down. However, jetting from above and below has a higher cleaning effect, and the effect of arranging them vertically as in this embodiment is sufficient.
- the nozzles 52a, 54a, and 56a have a particle size of less than 100 ⁇ m and a pressure of about 0.3 MPa (about 0.2 to 0.4 MPa), and are mist-like cleaning liquid. Has been spouted. In this way, even fine particles are removed It is possible to clean the object T with a very high degree of cleanliness even if the object T has a complicated shape.
- the mist-like cleaning liquid is mixed with a gas (air or nitrogen) and a liquid (cleaning liquid) at the nozzles 52a, 54a, and 56a, and is sprayed. By doing so, a very fine mist is formed, and a state suitable for cleaning is obtained.
- the particle size of the fog is a value measured by a phase Doppler particle analyzer. This particle size can be changed by adjusting the size of the hole formed in the nozzle, the pressure of the introduced gas (air or nitrogen), and the pressure of the liquid.
- the pressure is the supply pressure of air or nitrogen, and is a value measured by a pressure gauge.
- a plurality of cleaning units 50 for cleaning with a mist-like cleaning liquid L are arranged (particularly, the cleaning unit 50 includes pure water L 1).
- the cleaning section 52 is divided into a pre-cleaning section 52, a cleaning section 54 using a chemical solution L2, and a rinsing section 56 using pure water
- the rinse section 56 is further divided into three parts.
- the washing liquids L 1 and L 2 are at least subjected to pure water washing, although they vary depending on the purpose.
- the wafer storage container 12 used for storing semiconductor wafers W if a cleaning solution containing a surfactant is used, the wettability and the like are improved, and the container is thoroughly cleaned. You.
- the pre-cleaning section 52 is made of pure water L1 for cleaning
- the chemical cleaning section 54 is made of pure water to which a surfactant is added.
- the chemical solution L2 is used, and the final rinsing section 56 is washed again with high-purity pure water L1.
- the cleaning liquid (pure water) L 1 used in the rinsing section 56 is used as the cleaning liquid (pure water) L 1 supplied in the pre-cleaning section 52. Is used to circulate. Do this In this way, pure water is effectively used.
- reference numeral 82 denotes a wastewater collecting tank provided below the transfer stage 80.
- the drainage recovery tank 82 includes a first recovery section 82 a located below the loader section 40 and the pre-cleaning section 52, and a second recovery section 82 b positioned below the chemical cleaning section 54. And a third collecting section 82 c located below the rinsing section 56, and a fourth collecting section 82 d located below the drying section 60 and the unloader section 70.
- the first recovery section 82a is connected to the main drainage pipe 86 via the first drainage pipe 84a, and the loader section 40 recovered in the first recovery section 82a and the pre-cleaning section 5
- the first recovered water from 2 is discharged as drain D from the main drain pipe 86 through the drain line.
- the second recovery section 82b is connected to the first circulation pipe 84b, and the second recovered water (chemical solution) from the chemical cleaning section 54 collected in the second recovery section 82b will be described later.
- the water is purified by passing through the pump Pl, the filter Fl, ⁇ %, j ⁇ , the tank Bl, the pump P2 and the filter F2, and is reused as a chemical solution. .
- the third recovery section 82c is connected to the second circulation pipe 84c, and the third recovered water (pure water) from the rinsing section 56 recovered in the third recovery section 82c is provided later. As shown in FIG. 15 described below, the water is purified by passing through the buffer tank B 2, the pump P 3 and the filters F 3 and F 4, and is reused as pure water in the pre-cleaning section 52.
- the fourth recovery section 82d is connected to the main drainage pipe 86 via the second drainage pipe 84d, and the drying section 60 collected in the fourth recovery section 82d and the outlet section.
- the fourth recovered water from 70 is drained as drain D from the main drainage pipe 86 through the drainage line.
- FIG. 15 is a schematic diagram showing a flow of supplying a cleaning liquid in the cleaning system of the present invention.
- FIG. 3 is a schematic explanatory diagram.
- reference numeral 90 denotes a pure water supply device, which is connected to a pre-cleaning section piping 90 a, a water curtain system pipe 90 b, a rinsing section piping 90 c, and a chemical cleaning section piping 90 d. Each is connected.
- Pure water supplied from the pure water supply device 90 to the pre-cleaning section piping 90a is supplied to the buffer tank B2 via the valve V1.
- the third recovered water (pure water) from the rinsing section 56 described above is supplied to the buffer tank B2 via the second circulation pipe 84c.
- the new pure water and the recovered pure water are mixed and purified by passing through the pump P3 and the filters F3 and F4, and the cleaning liquid of the nozzle 52a of the pre-cleaning section 52 ( (Pure water). If excess water is supplied to the buffer tank B2, the excess water overflows and is discharged as drain D.
- Pure water supplied from the pure water supply device 90 to the water container system piping 90 b is supplied to the water containers 53, 55, and 57 via a valve V 2 and a flow meter G 1.
- the pure water supplied from the pure water supply device 90 to the rinsing section piping 90 c is supplied to the rinsing section 5 via a valve V 3, a flow meter G 2, a buffer tank B 3, a pump P 4 and a filter F 5.
- the cleaning liquid (pure water) is supplied to the nozzle 5 6 a of 6.
- the pure water supplied from the pure water supply device 90 to the chemical solution cleaning system piping 90 d is supplied to a mixing tank M via a valve V 4 and a weighing sensor R 1.
- Surfactant is also supplied from activator supply 92 via valve V5 and weighing sensor R2.
- a chemical solution having an arbitrary concentration composed of pure water and a surfactant is prepared and sent to a puffer tank B1.
- the second recovered water (chemical solution) from the chemical cleaning section 54 is supplied to the buffer tank B1 via the first circulation pipe 84b, the pump P1, and the filter F1. You.
- This buffer tank B Four
- the new chemical solution and the collected chemical solution in 1 are mixed and supplied as a cleaning solution (chemical solution) for the nozzle 54a of the chemical solution cleaning section 54 via the pump P2, the filter F2, and the flow meter G3. If the chemical is excessively supplied to the buffer tank B1, the excessive chemical overflows and is drained as drain D.
- FIG. 16 is a schematic explanatory view showing an air supply flow in the cleaning system of the present invention.
- reference numeral 94 denotes an air supply device, which is connected to the drying section system piping 96 and the nozzle system piping 98, respectively.
- the drying section system pipe 96 is branched into an upper drying section system pipe 96a and a lower drying section system pipe 96b.
- the nozzle piping 98 is branched into a gear box purge piping 98a, an upper nozzle piping 98b, a lower nozzle piping 98c, and an air curtain piping 98d.
- the air supplied from the air supply device 94 to the drying section piping 96 is passed through the filter F 6, the regulator H 1 and the flow meter G 4 to the upper drying section piping 96 a and the lower drying section. Introduced to the system piping 96 b.
- the air introduced into the upper drying system piping 96 a is supplied to the upper air nozzle 60 a through the valve V 7 and the pressure gauge Q 1, and is jetted to generate air power 62.
- the air introduced into the lower drying section system pipe 96 b is supplied to the lower air nozzle 60 a through the valve V 8 and the pressure gauge Q 2 and is jetted to act as the air cutter 62.
- the air supplied from the air supply device 94 to the nozzle system piping 98 is passed through the filter F 7, the regulator H 2 and the flow meter G 5, and the gear box purge system piping 98 a, the upper nozzle system piping 98 b, Introduced to lower nozzle piping 98c and air curtain piping 98d.
- the air introduced into the above gearbox purge system piping 9 8a passes through the regulator H3, the valve V9 and the flow meter G6, and the transport stage 80 is long. It is supplied to a gear box (not shown) that drives the ring-shaped narrow belt 80a, purges the inside of the gear box with air, and then exhausts.
- the air introduced into the upper and lower nozzle piping 98b, 98c is supplied to the nozzles 52a, 54a, 56a together with the cleaning liquid supplied by the supply flow shown in FIG. Injected at high pressure.
- the air introduced into the air-powered piping 98d is injected through the regulator H4, the valve V10 and the flow meter G7 to form an air-powered 44.
- FIG. 2 to 4 are schematic explanatory diagrams showing the loader unit 40.
- the object T to be cleaned is set on a transfer stage 80 such as a comparator. At this time, the position is adjusted by the positioning guide 42 before entering the cleaning section 50.
- the opening is directed downward.
- An air curtain 44 is provided at the entrance from the loader section 40 to the cleaning section 50, and water droplets rising from the inside of the tunnel-shaped outer wall 51 provided in the cleaning section 50 are output to the outside. Not configured. Further, the air flow rate of the air curtain 44 can be adjusted.
- Reference numeral 46 denotes an exhaust pipe provided below the air curtain 44.
- the pre-cleaning section 52 is provided with a nozzle 52 a that is a jetting mechanism for jetting the mist-like cleaning liquid L 1 at a high pressure into the outer wall 51 formed in a tunnel shape.
- the shape of the tunnel-shaped outer wall 51 is formed in an R shape so that water droplets adhering to the inner wall flow smoothly down the wall.
- the number and position of the nozzles 52a are not particularly limited. What is necessary is just to set suitably according to the magnitude
- FIGS. 17 to 19 a cleaning system for cleaning a storage container 12 of 200 mm in diameter of silicon wafer as shown in FIGS.
- the number of installed nozzles 52a is 18 pieces.
- the cleaning speed can be increased, and in the examples of FIGS. 5 and 6, the passing speed of the object T to be cleaned in the pre-cleaning section 52 is about 3 seconds. Can be washed well.
- the nozzle 52 a used in the pre-cleaning section 52 mixes gas (air) and liquid (pure water) supplied by a supply system as shown in FIGS. 15 and 16. It is preferable to use a resin nozzle that can be sprayed. It is possible to use metal nozzles, but when cleaning the storage container for silicon wafers used in the semiconductor field, problems such as metal contamination as well as particles are considered important, It is preferable to use a nozzle made of a small number of members (resin).
- the cleaning liquid used in the pre-cleaning section 52 may be pure water.
- the pure water supplied from the pure water supply device 90 may be used directly, in the cleaning system of the present invention, the pure water used in the rinsing section 56 described later is reused. I have. That is, as shown in FIG. 15, pure water used in the rinsing section 56 is accumulated in the buffer tank B2, and is reused by passing through the pump P3 and the filters F3, F4.
- the filter may be provided in a plurality of stages, and a filter capable of removing foreign matter of about 2 m and a filter capable of removing foreign matter of about 0.1 may be provided. In this way, the pre-cleaning section 52 can be used. There is no problem for pure water to be used.
- the flow rate of the pure water and the flow rate of the air supplied from the gas supply system are adjusted, and the mist-like cleaning liquid is jetted by mixing and jetting with the nozzle 52a.
- air supply pressure, about 0.1MPa
- liquid pressure liquid pressure, about 0.2MPa
- the pressure of the spray liquid L1 to be sprayed is set to 0.2 to 0.4 MPa.
- nozzle 52a for example, a two-fluid fine mist generating nose manufactured by Ikeuchi Co., Ltd. can be effectively used.
- the chemicals of the next process are prevented from entering the pre-cleaning section 52, and each process is separated.
- the basic configuration of the chemical cleaning section 54 is the same as that of the pre-cleaning section 52, and the number of nozzles 54a serving as the injection mechanism in the chemical cleaning section 5 is arranged in the same manner as the pre-cleaning section 52. .
- the difference from the pre-cleaning section 52 is that the supplied cleaning liquid is different.
- a chemical solution L 2 composed of pure water to which a surfactant is added is used.
- the surfactant is not particularly limited, but is preferably of a type having a low foaming property. For example, score roll (trade name of a nonionic surfactant manufactured by Kao Corporation) or the like is used.
- this concentration is 0.001 to 0.1%.
- This is mixed with air and the above chemical solution in the same manner as in the pre-cleaning section 52, and sprayed on the object T to be cleaned in the form of a mist.
- the chemical solution L2 consisting of pure water to which the surfactant was added was used as a circulation type system for reuse.
- the surfactant from the surfactant supply device 92 and the pure water from the pure water supply device 90 are mixed to an arbitrary concentration. New drugs adjusted
- the liquid was prepared, sent to a buffer tank B1, and supplied from the buffer tank B1 to a nozzle 54a of the chemical liquid cleaning section 54 through a pump P2 and a filter F2.
- the used chemical solution is collected and returned to buffer ink B1 again.
- a laser curtain 55 is arranged between the cleaning section 54 and the rinsing section 56 in the next step.
- the chemical cleaning section 54 is also designed to pass through in about 3 seconds.
- the basic cleaning configuration of the rinse section 56 is the same as the pre-cleaning section 52 and the chemical cleaning section 54 described above.
- the difference from the pre-cleaning section 52 and the chemical cleaning section 54 is, for example, the number of nozzles 56a that are the injection mechanisms to be arranged.
- This rinsing section 56 is a final cleaning line, and it is necessary to remove the surfactant attached to the object T to be cleaned.
- the cleaning is made three times longer than the pre-cleaning section 52 and the chemical cleaning section 54. In other words, in the example shown, it is designed to pass in about 9 seconds.
- the pure water used here was directly supplied from a pure water supply device 90. Also, since the pure water used here is large, it is reused. This may be circulated to the pre-cleaning section 52 as described above. Further, after passing through the cleaning section 50 as described above, in the present embodiment, it adheres to the object T to be cleaned. It has a drying unit 60 that removes the dried liquid by air (air) A.
- the drying section 60 is provided with an air force cutter 62 for injecting air as shown in FIGS. 11 and 12, and the air-cutter 62 swings to remove water droplets from the article to be cleaned. That's it.
- Air cutter 6 2 slits air A or multiple A plurality of air nozzles 60a having the following pores are arranged to blow off water droplets at a high pressure (about 0.2 to 0.4 MPa).
- Reference numeral 64 denotes an exhaust pipe provided below the air cutter 62.
- a water curtain 57 is also provided at the boundary between the washing section 50 and the drying section 60.
- the object T to be cleaned after such cleaning is discharged to the unloader section 70.
- the mouth opening portion 70 places an object T to be cleaned on a work table 88 in a clean unit 87.
- the clean unit 87 does not need to be integrated with the main cleaning system 30 in particular.
- the unloader section 70 may be connected to the next drying step. Note that it is preferable to install a removing machine or the like in the unloader section 70 because the particles do not reattach to the washed object T to be washed. By adopting such an integrated cleaning system, cleaning can be performed with excellent cleaning ability and with high work efficiency.
- the three types of cleaning were performed only in the chemical cleaning section using a cleaning liquid containing 0.1% surfactant as a chemical, and the other methods such as pre-cleaning, rinsing, and drying were performed in the same manner.
- the pre-cleaning and rinsing were performed by a shower method.
- the dip method was performed according to the following flow. Pure water shower cleaning (3 seconds) ⁇ immersion in surfactant bath (3 seconds) ⁇ pure water shower rinse (15 seconds).
- the shower method was performed according to the following flow. Pure water shower cleaning (3 seconds) ⁇ Surfactant shower cleaning (3 seconds) — pure water shower rinsing (15 seconds). The droplet size of the shower was about 0.5 to 1.0 mm.
- the high-pressure spray method of the present invention was performed according to the following flow. Pure water shower cleaning (3 seconds) ⁇ Surfactant high pressure spray cleaning (3 seconds) — pure water shower rinse (15 seconds). The droplet size of the spray was about 10 to 100 m.
- particles of 0.5 xm or more are averaged to 5.0.
- particles of 0.3 xm or more are averaged to 19.
- the average number of particles that were 5 and 0.2 m or more was 164.4, and the number of particles that were 0.1 m or more was 262.88.
- the use of the method of the present invention is particularly effective for removing particles having a particle size of about 0.1 m and about 0.2 m.
- a polycarbonate storage container made of polycarbonate is shown below.
- This storage container is divided into a lid, a substrate holder (retainer), a substrate storage force set (inner cassette), a packing (gasket), and a container body (lower box), which need to be cleaned.
- the retainer and the gasket can be cleaned individually, but in the present embodiment, a plurality of them are put together in a basket, transported and cleaned.
- the concave parts such as the lid part and the main body part constituting the storage container were set in the loader part of the present cleaning system with the opening facing downward. It passes through the air curtain, which is sprayed at a pressure of about 0.1 to 0.2 MPa, and moves to the pre-cleaning section.
- atomized pure water having a particle diameter of 10 to 100 (reused pure water used in the rinsing section) was supplied at a pressure of 0.3 MPa.
- the nozzles used were two-fluid fine mist generating nozzles (BIM-PPV type) manufactured by Ikeuchi Co., Ltd., and were arranged at the upper and lower nine positions (18 in total) described in the above embodiment.
- the moving speed of the conveyor was adjusted so that it passed through this stage in 3 seconds.
- the cleaning liquid in this area was pure water, and was supplied in the form of a mist with a particle size of 10 to 100/111 and a pressure of 0.3 MPa.
- the drying section of the cleaning system of the present invention is mainly used for draining, and is not completely dried (it is also possible to dry it) because it is separately dried later.
- the water drops adhering to the object to be cleaned are removed by an air cutter.
- the air-cutter arranges a plurality of slit-shaped air nozzles with dry air (high-purity air that has passed through the filter) or a plurality of holes with a diameter of about l1 mm. Water pressure is blown off at the supply pressure. After that, it moved to the unloader and cleaning was completed.
- the components of the storage container that came out through such a cleaning system were assembled after being naturally dried in a clean bench to obtain a storage container, and the number of particles contained therein was confirmed. Particles were confirmed by placing pure water in the container after washing, rocking for several minutes, leaving the container to stand for a certain period of time, and then measuring with a liquid particle counter.
- cleaning was performed manually by the dipping method (dip method). That is, the storage container was immersed in a pure water tank as pre-cleaning, then immersed in a water tank to which a surfactant was added, and then three pure water rinsing tanks were arranged for cleaning. The cleaning time for each tank is about 10 seconds. After that, it was drained and dried in a clean bench.
- the number of particles is about 50 to 500 for particles of 0.3 or more, and the cleaning effect is not improved.
- the present invention is not limited to the above embodiment.
- the above embodiment is an exemplification.
- the present invention is not limited to any embodiment having substantially the same configuration as the technical idea described in the claims of the present invention and exerting the same function and effect.
- drying unit that drains water as described above in the cleaning system, it is easy to perform subsequent processing and the like, but it is preferable. However, there is no drying unit in this system (no drying using an air knife). ), And may be separately dried in a clean bench-oven type dryer. Conversely, in the drying section, the purpose is to drain water, and drying is not complete. The system may be completely dried, and there is no need to limit the configuration to the above.
- the drying method is not particularly limited as long as the environment can be maintained so that the number of particles reduced by washing does not increase due to reattachment or the like.
- a cleaning solution such as a surfactant. If it is relatively dirty, adding a surfactant can improve the wettability of the storage container and improve the ability to remove particles etc., but when cleaning a new storage container, etc. It is possible to clean to a relatively good particle level with pure water alone. It can be seen that the mist state and the effect of supplying it at high pressure are significant for removing particles. Also, in the above example, an explanation was given using an example of an AA container capable of storing a silicon wafer having a diameter of 200 mm, particularly a container for shipping an AHA as shown in Figs. The object is not limited to this, and it can be carried out in a container for accommodating a wafer having a diameter of 300 mm or a container called a carrier used in the process. Industrial applicability
- the particles attached to the container and the very small particles having a particle size of about 0.3 m, which are bothersome in the semiconductor field, can be sufficiently cleaned and cleaned. Can be removed.
- a sufficient cleaning effect can be obtained up to the bottom and side surfaces of the groove regardless of the shape of the storage container, for example, the depth and width of the groove.
- sufficiently small particles can be removed without using brush cleaning, ultrasonic cleaning, or a chemical solution such as an organic solvent, thereby simplifying the cleaning line and reducing the cost of the chemical solution. It becomes.
- the time from input of the storage container to collection is extremely short. Short, efficient cleaning and complete automation
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Cleaning Or Drying Semiconductors (AREA)
- Cleaning By Liquid Or Steam (AREA)
- Nozzles (AREA)
Description
Claims
Priority Applications (2)
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JP2005505969A JP4013207B2 (ja) | 2003-05-09 | 2004-04-06 | 洗浄システム及び洗浄方法 |
US10/554,265 US20060281326A1 (en) | 2003-05-09 | 2004-04-06 | Washing apparatus, washing stystem, and washing method |
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JP2003-131386 | 2003-05-09 | ||
JP2003131386A JP2004335838A (ja) | 2003-05-09 | 2003-05-09 | 洗浄装置、洗浄システム及び洗浄方法 |
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WO2004100241A1 true WO2004100241A1 (ja) | 2004-11-18 |
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PCT/JP2004/004940 WO2004100241A1 (ja) | 2003-05-09 | 2004-04-06 | 洗浄装置、洗浄システム及び洗浄方法 |
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US (1) | US20060281326A1 (ja) |
JP (2) | JP2004335838A (ja) |
WO (1) | WO2004100241A1 (ja) |
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CN115008519B (zh) * | 2022-08-09 | 2023-01-31 | 苏州柯裕电子材料有限公司 | 电子材料用自动化膜切设备 |
Also Published As
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US20060281326A1 (en) | 2006-12-14 |
JP2004335838A (ja) | 2004-11-25 |
JPWO2004100241A1 (ja) | 2006-07-13 |
JP4013207B2 (ja) | 2007-11-28 |
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