WO2007119648A1 - 気体清浄装置および半導体製造装置 - Google Patents
気体清浄装置および半導体製造装置 Download PDFInfo
- Publication number
- WO2007119648A1 WO2007119648A1 PCT/JP2007/057390 JP2007057390W WO2007119648A1 WO 2007119648 A1 WO2007119648 A1 WO 2007119648A1 JP 2007057390 W JP2007057390 W JP 2007057390W WO 2007119648 A1 WO2007119648 A1 WO 2007119648A1
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- WO
- WIPO (PCT)
- Prior art keywords
- filter layer
- particles
- gas
- cleaning device
- gas cleaning
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/52—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/52—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material
- B01D46/521—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/56—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition
- B01D46/62—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in series
-
- 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
Definitions
- the present invention relates to a gas cleaning device that generates particles by removing particles in a gas, and a semiconductor manufacturing apparatus using the gas cleaning device.
- particles such as HEPA (High Efficiency Particulate Air) filters and ULPA (Ultra Low Penetration Air) filters are used to reduce particles around the semiconductor manufacturing equipment and inside the semiconductor manufacturing equipment (for example, the wafer loading section). In some cases, air was supplied through a filter.
- HEPA High Efficiency Particulate Air
- ULPA Ultra Low Penetration Air
- Patent Document 1 Japanese Patent Publication No. 7-66165
- the present invention provides a novel and useful gas purifier that solves the above problems, and Providing a semiconductor manufacturing apparatus using the gas purifier is a general issue.
- a specific object of the present invention is to provide a gas cleaning device for removing fine particles and supplying clean gas, and a semiconductor manufacturing apparatus using the gas cleaning device.
- the above-described problem is a gas cleaning device for removing particles in a gas, wherein the first filter layer is installed on each of the upstream side and the downstream side of the gas. And a second filter layer, wherein the first filter layer collects particles smaller than the particles collected by the second filter layer. To do.
- the above problem is solved by the substrate processing apparatus having the gas cleaning apparatus.
- the above-described problem is a gas cleaning device that removes particles in a gas, and includes a first filter layer and a second filter layer.
- the first filter layer and the second filter layer are solved by a gas purifier characterized by having different collection efficiency characteristics with respect to a change in particle diameter of particles.
- the above-described problem is a gas cleaning device that removes particles in a gas, and includes a first filter layer and a second filter layer.
- the first filter layer and the second filter layer are solved by a gas cleaning device characterized in that collection efficiency for particles having the same particle diameter is different.
- FIG. 1 is a view showing a gas cleaning device according to Example 1.
- FIG. 1 is a view showing a gas cleaning device according to Example 1.
- FIG. 2 is a view showing a conventional gas cleaning device.
- FIG. 3 is a diagram (part 1) showing an evaluation result of the gas cleaning device of FIG.
- FIG. 4 is a diagram (part 2) showing an evaluation result of the gas cleaning device of FIG.
- FIG. 5 is a diagram (part 3) showing an evaluation result of the gas cleaning device of FIG.
- FIG. 6 is a diagram (part 4) showing the evaluation result of the gas cleaning device of FIG.
- FIG. 7 is a diagram (part 5) showing an evaluation result of the gas cleaning device of FIG.
- FIG. 8 is a diagram showing an evaluation method of the gas cleaning device of FIG. 1.
- FIG. 9 is a diagram showing an evaluation result of the gas cleaning device of FIG. 1.
- FIG. 10 is a diagram showing the collection efficiency of the fibrous filter.
- FIG. 11 is a view showing a modification of the gas cleaning device of FIG. 1.
- FIG. 12 shows a semiconductor manufacturing apparatus according to Example 2.
- the gas cleaning device is a gas cleaning device for removing particles in a gas, and includes a first filter layer and a second filter layer, and the first filter layer The diameter of the fibers constituting the second filter layer is larger than the diameter of the fibers constituting the second filter layer. Yes.
- the conventional gas cleaning device does not sufficiently collect particles of 50 nm or less, and there is a concern that the clean atmosphere is contaminated by the gas supplied by the conventional gas cleaning device.
- the gas cleaning device in the gas cleaning device according to the present invention, a plurality of filter layers (first filter layer and second filter layer) made of a fibrous material for collecting particles are provided. Further, the diameter of the fiber constituting the first filter layer is larger than the diameter of the fiber constituting the second filter layer. For this reason, with the gas cleaning device according to the present invention, it is possible to remove fine particles from the gas, which have been difficult to measure in the past.
- FIG. 1 is a cross-sectional view schematically showing a gas cleaning device (filter) 100 according to Embodiment 1 of the present invention.
- a gas purifier 100 according to the present embodiment is installed between a primary side space 100A and a secondary side space 100B, and gas (for example, air) supplied from the primary side space 100A. ) Is filtered to remove particles and supplied to the secondary side space 100B.
- gas for example, air
- the gas cleaning device 100 includes a gas blowing unit 103 for forming a gas flow, a filter unit 101 for removing particles in the gas supplied from the gas blowing unit 103, and a filter unit.
- 102 has a laminated structure.
- the air blowing unit 103 has a structure in which air blowing means (for example, a fan) 103A is housed in a housing 103B.
- the filter portion 101 has a structure in which a filter layer 101 A is accommodated in a housing portion 101B.
- the filter unit 102 has a structure in which a filter layer 102A is housed in a housing unit 102B.
- the filter layer 101A mainly collects small particles! / And particles (for example, 50 nm or less), and the filter layer 102A has a particle size larger than the particles collected by the filter layer 101A.
- the gas cleaning device 100 Since the gas cleaning device 100 according to the present embodiment has the above-described structure, the gas cleaning device 100 efficiently removes particles having a small particle diameter to particles having a relatively large particle diameter from the gas. Can be supplied to the secondary space 100B.
- the filter layers 101A and 102A are both constituted by a fibrous filter layer, and the fiber diameter of the fibers constituting the filter is larger in the filter layer 101A than in the filter layer 102A. That is, it is possible to remove even smaller particles by using a filter layer having a large fiber diameter.
- the above filter layer 102 A force corresponds to a normal ULP A filter.
- FIG. 2 is a diagram schematically showing a conventional gas cleaning device 200 used for evaluating the particle removal effect.
- a gas purifier 200 shown in the figure is installed between a primary side space 200A and a secondary side space 200B, and is supplied with a gas (for example, air is filtered to remove particles and supply the secondary side space 200B.
- the gas cleaning device 200 has a structure in which a gas blowing unit 203 for forming a gas flow and a filter unit 202 for removing particles in the gas supplied from the gas blowing unit 203 are stacked. is doing.
- the air blowing unit 203 has a structure in which air blowing means (for example, a fan) 203A is housed in a housing 203B.
- the filter unit 202 has a structure in which a filter layer 202A is housed in a housing unit 202B.
- the filter layer 202A is composed of a fibrous filter layer (UL PA filter).
- the wafer wl was installed in the primary side space 200A and the wafer w2 was installed in the secondary side space 200B, and the behavior of particles and the state of particle removal were examined.
- FIG. 3 is a diagram showing the results of examining the number of particles on the silicon wafer wl left for 10 minutes in the primary side space 200A (the space before particle removal) shown in FIG. Referring to Fig. 3, the particles on wafer wl tend to increase as the particle size decreases. For example, when it is considered to prevent contamination of the semiconductor device manufacturing process by particles, it is important how to remove such particles having a small particle diameter and difficult to remove. For this reason, the inventors of the present invention conducted the following analysis on the behavior of fine particles.
- Fig. 4 the particles shown in Fig. 3 are arbitrarily selected by SEM (scanning electron microscope) and analyzed using EDX (energy dispersive X-ray analyzer) to examine the particle size and components. It is a figure which shows the result.
- SEM scanning electron microscope
- EDX energy dispersive X-ray analyzer
- the component (element) is identified by analyzing the retrieved particles using EDX.
- the number of particles that have a particle size force of 0.1—0.5 / ⁇ ⁇ , 0.5—1.0 m, 1.0 m or more is also investigated. .
- Fig. 5 shows the metal contamination of the surface of the silicon wafer wl left in the primary space 200A shown in Fig. 2 for 10 minutes by VPD ICP-MS (gas phase analysis + inductively coupled plasma mass spectrometry). It is a figure which shows the result analyzed using).
- Na contamination on the wafer surface is caused by particles having a particle diameter of 0.1 nm (lOOnm) or less that were not detected in the analysis shown in FIG. This is considered to have a large impact.
- metal contamination such as Na is presumed to be greatly affected by fine particles that are difficult to detect with current technology.
- the following table shows the amount of increase in particles of the wafer w2 that is left in the secondary space 200B shown in Fig. 2 for 60 hours.
- the following table shows the particle size force of particles 0.05-0. 06 ⁇ m, 0. 06-0. 08 ⁇ m, 0. 08— 0. 10 ⁇ m, 0. 10— 0. 12 ⁇ m , 0. 12—0.15 m, and increase of 0. m or more.
- FIG. 6 is a diagram showing the results of analyzing metal contamination on the surface of the wafer w2 using VPD ICP-MS.
- the wafer used for the above evaluation is preliminarily reinforced with metal on the wafer surface at a predetermined concentration or less (for example, Na is 2 X 10 8 atoms / cm 2 or less, A1 is 3 X 10 8 atoms / cm 2 or less).
- a predetermined concentration or less for example, Na is 2 X 10 8 atoms / cm 2 or less, A1 is 3 X 10 8 atoms / cm 2 or less.
- the lower limit of quantification is a
- the reference value (the value at the start of standing after the above-mentioned surface metal removal treatment)
- the measured value after standing for 60 hours is c. It is shown by.
- Figure 7 shows the correlation between the amount of Na metal contamination on the wafer surface and the number of Na-containing particles estimated from the amount of contamination.
- the particles that are the source of Na exist in the form of NaCl, and the shape of the particles is spherical.
- the numbers of particles that are considered to exist on the wafer surface are shown for particle size forces of 50 nm, 5 nm, and lnm, respectively.
- the particle size of particles (NaCU-like particles) is 50 ⁇ m
- the number of particles corresponding to the detected amount of Na shown in FIG. About 3 x 10 5 per c (300mm).
- the increase in the number of particles on the wafer surface is, as indicated above, in the range of particle size force SO. 05 m to 0.1 m (50 nm to LOONm). It is 18 pieces.
- the substance related to Na contamination that has passed through the gas cleaning device 100 is mostly particles having a particle size of 50 nm or less.
- particles with a particle size of 50 nm or less are difficult to detect, and so far there have been few studies on the correlation between the removal method and metal contamination.
- FIG. 8 is a diagram schematically showing an evaluation method for removing particles (metal contamination) performed using the gas cleaning device 100 described in FIG. However, the parts described previously in FIG. In the above evaluation, the filter layer 101A and the filter layer 102A were made to have the same material and density as the initial evaluation (so as to be a double ULPA filter).
- filter layers 101A and 102A a ULPA filter manufactured by Daikin Industries, Ltd. (99.9995% or more with respect to particles having a wind speed of 0.5 mZsec and a particle size of 0.15 m).
- An air filter having particle collection efficiency and an initial pressure loss of 245 Pa or less was used.
- a silicon wafer (300mm) W2 is placed in the secondary space 100B of the gas cleaning device 100, and left for 60 hours to increase the number of particles and prevent surface metal contamination. Evaluation was performed.
- the following table shows the increase in the number of particles on the wafer W2.
- the particle size force of Naughty Nore 0.05-0.06 ⁇ m, 0.06—0.0.08 ⁇ m, 0.08—0.10.m, 0.10-0.12 ⁇ m, 0. 12— Shows the amount of increase in each case above 0.15 ⁇ m, 0.15 m.
- “Single” shows the results of the evaluation method shown in FIG. 2, and “double” shows the results of the evaluation method shown in FIG.
- the doubled filter layer shows that the number of transmitted particles is reduced.
- FIG. 9 is a diagram showing the result of analyzing the metal contamination on the surface of the wafer W2 using VPD ICP-MS in the same manner as in the analysis described with reference to FIG.
- the evaluation result (detection result d) of the wafer W2 is added to FIG. 6 shown above.
- the parts described above are denoted by the same reference numerals, and description thereof is omitted.
- Fig. 9 it was confirmed that the amount of Na, Al, and Fe detected on the wafer decreased as a result of double ULPA filters.
- the particles cause Na contamination! /, And the particles cause other metal contamination.
- the particle size is thought to be particularly small compared to particles, and in order to reduce Na contamination, it is preferable to effectively remove fine particles of 50 nm or less containing Na.
- the fiber diameter of the fiber is larger than the fibers constituting the filter layer 102A.
- the filter layer 101 A composed of the fibers having the filter layer 101 A is further included.
- Fig. 10 shows the collection efficiency when the fiber diameter df is changed when particles are removed by a fibrous filter ("Aerosol Technology", by William C. Heines, Published by Inoue Shoin, listed on pi 78).
- Figure 10 shows the difference in collection efficiency when the fiber diameter df is 0.5 m, 2 m, and 10 m.
- the horizontal axis of the graph indicates the particle size of the collected particles, and the vertical axis indicates the collection efficiency.
- the fiber diameter tends to be larger and the collection efficiency tends to be larger. This tendency is considered to suggest that the filter fiber diameter is thicker and more effective when collecting particles with a small particle size of 100 nm (0.1 m) or less. .
- the fiber diameter of the fibers constituting the filter is narrower.
- the force is less than the predetermined particle size (5 Onm or less) ) Is collected, it is expected that the fiber diameter of the fibers constituting the filter is advantageously larger.
- filter layers having different particle collection efficiencies filter layers having different collection efficiency characteristics with respect to changes in particle particle size, or particles having the same particle size
- By combining (stacking) filter layers with different trapping efficiencies for particles it is possible to efficiently remove both fine particles with a particle size of 50 nm or less and particles with a particle size of several hundred nm. It has a possible configuration.
- the minimum collection efficiency is required when collecting particles with a particle size larger than a predetermined particle size (for example, lOOnm or more).
- a filter with a large particle size is suitable, and when collecting particles with a particle size of not more than a predetermined particle size (for example, 50 nm or less), a filter with a small minimum collection efficiency is suitable. That is, by combining (stacking) filters with different minimum collection efficiencies, it is possible to efficiently remove both fine particles with a particle size of 50 nm or less and particles with a particle size of several hundred nm. And
- the filter layers 101A and 102A have a particle collection efficiency of 99.9995% or more for particles having a particle size of 0.15 m at the rated air flow, and an initial pressure loss of 245 Pa or less.
- Lay out the filter with filter (specified in JIS Z8122).
- the pressure loss of the filter layer 101A is smaller than the pressure loss of the filter layer 102A. Pressure loss is smaller than when layer 102A is laminated.
- the filter layer 101A having a large fiber diameter is preferably installed on the upstream side of the air flow. This is because of the small particle size This is because, if the above structure is collected and agglomerated and then desorbed from the filter layer, the separated particles can be collected again by the filter layer 102A.
- the filter layers 101A and 102A may have different porosity.
- FIG. 11 is a modification of the gas cleaning device 100 shown in FIG.
- the parts described above are denoted by the same reference numerals, and description thereof is omitted.
- the gas cleaning device 300 shown in this figure has a structure in which a removal layer 104 for removing organic substances or ions is added to the gas cleaning device 100 shown in FIG. ing.
- the removal layer has a structure in which the filter layer 104A is accommodated in the housing portion 104B.
- the filter layer is not limited to a fibrous layer.
- the filter layer installed on the upstream side of the gas flow may be made of a material selected from the group force consisting of glass, metal, resin, ceramic, and activated carbon.
- the filter layer installed on the downstream side of the gas flow may be composed of, for example, either glass or resin.
- particles having a particle size of 50 nm or less, mainly composed of metal (such as Na) are removed, so the filter layer installed on the downstream side in particular. Is preferably made of a non-metallic material.
- the upstream filter layer and the lower filter layer are not limited to a single-layer structure, and may have a plurality of layers.
- FIG. 12 is a diagram schematically showing a configuration of a semiconductor manufacturing apparatus 500 which is an example of a substrate processing apparatus configured using the gas cleaning apparatus 100 shown in FIG.
- the semiconductor manufacturing apparatus 500 is a CVD (chemical vapor deposition) apparatus having a general vertical furnace.
- the semiconductor manufacturing apparatus 500 has a casing 501. Inside the body 501 is installed a vertical furnace 503 that performs film formation by CVD. In addition, a substrate holding unit 504 that holds a plurality of wafers and conveys the held wafers to the inside of the vertical furnace 503 is installed inside the housing unit 501.
- the substrate holder 504 is configured to be inserted into the vertical furnace while holding the wafer by an operating mechanism (not shown). Further, a wafer (substrate to be processed) is configured to be loaded from the loading unit 502 into the housing unit 501.
- the gas cleaning device 100 described in the first embodiment is installed inside the casing unit 501, and the gas (air) taken from the periphery of the casing unit 501 is The gas cleaning device 100 removes particles (substance that becomes a contamination source) and supplies the particles to the inside of the casing 501.
- the substrate processing apparatus using the gas cleaning apparatus 100 is not limited to the above example.
- the above-mentioned gas cleaning apparatus is also applied to a type (single-wafer) film forming apparatus or etching apparatus or coater Z developer unit that processes wafers one by one. It is possible.
- examples of the substrate processing apparatus include a substrate storage device and a substrate transfer device. Moreover, you may use for the atmosphere control of a clean room, etc.
- gas for removing fine particles and supplying clean gas is provided. It becomes possible to provide a body cleaning apparatus and a semiconductor manufacturing apparatus using the gas cleaning apparatus.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- 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)
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- Filtering Of Dispersed Particles In Gases (AREA)
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Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007541534A JPWO2007119648A1 (ja) | 2006-04-07 | 2007-04-02 | 気体清浄装置および半導体製造装置 |
US12/296,305 US20090183476A1 (en) | 2006-04-07 | 2007-04-02 | Gas purifying apparatus and semiconductor manufacturing apparatus |
CN2007800005183A CN101321572B (zh) | 2006-04-07 | 2007-04-02 | 气体净化装置和半导体制造装置 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006106664 | 2006-04-07 | ||
JP2006-106664 | 2006-04-07 |
Publications (1)
Publication Number | Publication Date |
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WO2007119648A1 true WO2007119648A1 (ja) | 2007-10-25 |
Family
ID=38609412
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2007/057390 WO2007119648A1 (ja) | 2006-04-07 | 2007-04-02 | 気体清浄装置および半導体製造装置 |
Country Status (6)
Country | Link |
---|---|
US (1) | US20090183476A1 (ja) |
JP (1) | JPWO2007119648A1 (ja) |
KR (1) | KR101078910B1 (ja) |
CN (1) | CN101321572B (ja) |
TW (1) | TWI434324B (ja) |
WO (1) | WO2007119648A1 (ja) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
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CN102362221B (zh) * | 2009-03-24 | 2014-08-06 | Nec显示器解决方案株式会社 | 图像产生装置的防尘结构和投影显示装置 |
JP4940323B2 (ja) * | 2009-07-29 | 2012-05-30 | 有限会社タクショー | 除塵装置及び除塵システム |
JP5865596B2 (ja) | 2011-03-25 | 2016-02-17 | 東京エレクトロン株式会社 | 粒子捕捉ユニット、該粒子捕捉ユニットの製造方法及び基板処理装置 |
CN106975274A (zh) * | 2017-04-28 | 2017-07-25 | 杭州卧特松环保科技有限公司 | 单材质梯度滤芯 |
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JP2004014981A (ja) * | 2002-06-11 | 2004-01-15 | Hitachi Kokusai Electric Inc | 基板処理装置 |
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US6171369B1 (en) * | 1998-05-11 | 2001-01-09 | Airflo Europe, N.V. | Vacuum cleaner bag construction and method of operation |
DE19843000C2 (de) * | 1998-09-21 | 2000-07-13 | Freudenberg Carl Fa | Luftfilter |
US6428610B1 (en) * | 2000-01-18 | 2002-08-06 | The University Of Tennessee Research Corporation | Hepa filter |
WO2001060496A1 (en) * | 2000-02-15 | 2001-08-23 | Hollingsworth & Vose Company | Melt blown composite hepa filter media and vacuum bag |
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JP2006175352A (ja) * | 2004-12-22 | 2006-07-06 | Toyota Boshoku Corp | フィルタ用濾材 |
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2007
- 2007-04-02 US US12/296,305 patent/US20090183476A1/en not_active Abandoned
- 2007-04-02 JP JP2007541534A patent/JPWO2007119648A1/ja active Pending
- 2007-04-02 WO PCT/JP2007/057390 patent/WO2007119648A1/ja active Application Filing
- 2007-04-02 KR KR1020087024431A patent/KR101078910B1/ko not_active IP Right Cessation
- 2007-04-02 CN CN2007800005183A patent/CN101321572B/zh not_active Expired - Fee Related
- 2007-04-04 TW TW096112081A patent/TWI434324B/zh not_active IP Right Cessation
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JPS4827629B1 (ja) * | 1969-12-27 | 1973-08-24 | ||
JPS5735920A (en) * | 1980-08-14 | 1982-02-26 | Yoshimi Oshitari | Filter medium for air |
JPS61268325A (ja) * | 1985-05-23 | 1986-11-27 | Toyo Roki Seizo Kk | 濾過材 |
JPS62133957U (ja) * | 1986-02-19 | 1987-08-24 | ||
JPH0766165A (ja) * | 1993-08-23 | 1995-03-10 | Sony Corp | 洗浄装置 |
JPH11347323A (ja) * | 1998-06-05 | 1999-12-21 | Nittetsu Mining Co Ltd | 焼結体フィルタとその製造方法 |
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JP2004014981A (ja) * | 2002-06-11 | 2004-01-15 | Hitachi Kokusai Electric Inc | 基板処理装置 |
Also Published As
Publication number | Publication date |
---|---|
KR101078910B1 (ko) | 2011-11-01 |
KR20080106333A (ko) | 2008-12-04 |
CN101321572A (zh) | 2008-12-10 |
TW200746245A (en) | 2007-12-16 |
CN101321572B (zh) | 2012-02-01 |
JPWO2007119648A1 (ja) | 2009-08-27 |
US20090183476A1 (en) | 2009-07-23 |
TWI434324B (zh) | 2014-04-11 |
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