TWI375734B - Ceramic coating material for thermal spray on the parts of semiconductor processing devices and fabrication method and coating method thereof - Google Patents
Ceramic coating material for thermal spray on the parts of semiconductor processing devices and fabrication method and coating method thereof Download PDFInfo
- Publication number
- TWI375734B TWI375734B TW096122264A TW96122264A TWI375734B TW I375734 B TWI375734 B TW I375734B TW 096122264 A TW096122264 A TW 096122264A TW 96122264 A TW96122264 A TW 96122264A TW I375734 B TWI375734 B TW I375734B
- Authority
- TW
- Taiwan
- Prior art keywords
- coating
- powder
- thermal spray
- particles
- amorphous
- Prior art date
Links
- 238000000576 coating method Methods 0.000 title claims description 167
- 238000000034 method Methods 0.000 title claims description 85
- 239000000463 material Substances 0.000 title claims description 62
- 239000007921 spray Substances 0.000 title claims description 31
- 238000004519 manufacturing process Methods 0.000 title claims description 25
- 239000004065 semiconductor Substances 0.000 title claims description 22
- 238000005524 ceramic coating Methods 0.000 title description 3
- 238000012545 processing Methods 0.000 title description 3
- 239000011248 coating agent Substances 0.000 claims description 154
- 239000000843 powder Substances 0.000 claims description 111
- 239000002245 particle Substances 0.000 claims description 43
- 239000000126 substance Substances 0.000 claims description 37
- 239000000203 mixture Substances 0.000 claims description 33
- 239000000758 substrate Substances 0.000 claims description 26
- 230000000052 comparative effect Effects 0.000 claims description 19
- 230000007547 defect Effects 0.000 claims description 19
- 229910052751 metal Inorganic materials 0.000 claims description 18
- 239000002184 metal Substances 0.000 claims description 18
- 238000002156 mixing Methods 0.000 claims description 13
- 239000002904 solvent Substances 0.000 claims description 11
- 238000005507 spraying Methods 0.000 claims description 11
- 238000012360 testing method Methods 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 7
- 230000003068 static effect Effects 0.000 claims description 6
- -1 Metacrylic ammonium salt Chemical class 0.000 claims description 5
- 238000001354 calcination Methods 0.000 claims description 5
- 239000007791 liquid phase Substances 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 2
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 2
- 150000003839 salts Chemical class 0.000 claims description 2
- 108010068370 Glutens Proteins 0.000 claims 1
- 235000021312 gluten Nutrition 0.000 claims 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims 1
- 239000004926 polymethyl methacrylate Substances 0.000 claims 1
- 238000007751 thermal spraying Methods 0.000 description 35
- 239000000919 ceramic Substances 0.000 description 30
- 239000011247 coating layer Substances 0.000 description 30
- 238000002441 X-ray diffraction Methods 0.000 description 28
- 230000008569 process Effects 0.000 description 28
- 238000005260 corrosion Methods 0.000 description 24
- 230000007797 corrosion Effects 0.000 description 23
- 239000007789 gas Substances 0.000 description 23
- 229910010293 ceramic material Inorganic materials 0.000 description 17
- 239000007788 liquid Substances 0.000 description 17
- 239000010410 layer Substances 0.000 description 16
- 238000001000 micrograph Methods 0.000 description 16
- 238000005530 etching Methods 0.000 description 11
- 238000002347 injection Methods 0.000 description 11
- 239000007924 injection Substances 0.000 description 11
- 239000007787 solid Substances 0.000 description 10
- 230000008859 change Effects 0.000 description 9
- 238000001816 cooling Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 9
- 230000015572 biosynthetic process Effects 0.000 description 8
- 239000000470 constituent Substances 0.000 description 8
- 238000007254 oxidation reaction Methods 0.000 description 8
- 230000001965 increasing effect Effects 0.000 description 6
- 239000011812 mixed powder Substances 0.000 description 6
- 239000012071 phase Substances 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 5
- 229910052681 coesite Inorganic materials 0.000 description 5
- 229910052906 cristobalite Inorganic materials 0.000 description 5
- 230000003647 oxidation Effects 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 5
- 229910052682 stishovite Inorganic materials 0.000 description 5
- 229910052905 tridymite Inorganic materials 0.000 description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 239000011230 binding agent Substances 0.000 description 4
- 239000002270 dispersing agent Substances 0.000 description 4
- 229910052746 lanthanum Inorganic materials 0.000 description 4
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 238000007743 anodising Methods 0.000 description 3
- 238000005336 cracking Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 230000001788 irregular Effects 0.000 description 3
- 239000007769 metal material Substances 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 238000001694 spray drying Methods 0.000 description 3
- 238000001308 synthesis method Methods 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 229910052727 yttrium Inorganic materials 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- IRIAEXORFWYRCZ-UHFFFAOYSA-N Butylbenzyl phthalate Chemical compound CCCCOC(=O)C1=CC=CC=C1C(=O)OCC1=CC=CC=C1 IRIAEXORFWYRCZ-UHFFFAOYSA-N 0.000 description 2
- 229910052684 Cerium Inorganic materials 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 239000011344 liquid material Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000001020 plasma etching Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 239000007790 solid phase Substances 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 1
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 229910000604 Ferrochrome Inorganic materials 0.000 description 1
- XPDWGBQVDMORPB-UHFFFAOYSA-N Fluoroform Chemical compound FC(F)F XPDWGBQVDMORPB-UHFFFAOYSA-N 0.000 description 1
- 241001629697 Panicum turgidum Species 0.000 description 1
- 241000282330 Procyon lotor Species 0.000 description 1
- 229910003910 SiCl4 Inorganic materials 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- MSJIBCNUPFPONA-UHFFFAOYSA-N [K].[Sr] Chemical compound [K].[Sr] MSJIBCNUPFPONA-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 1
- 229910052794 bromium Inorganic materials 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000008199 coating composition Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 235000012907 honey Nutrition 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000010849 ion bombardment Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 210000004072 lung Anatomy 0.000 description 1
- 125000000007 metacrylic acid group Chemical group 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000005300 metallic glass Substances 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 229910052762 osmium Inorganic materials 0.000 description 1
- SYQBFIAQOQZEGI-UHFFFAOYSA-N osmium atom Chemical compound [Os] SYQBFIAQOQZEGI-UHFFFAOYSA-N 0.000 description 1
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 description 1
- 239000012782 phase change material Substances 0.000 description 1
- 238000007750 plasma spraying Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000011253 protective coating Substances 0.000 description 1
- 229910052707 ruthenium Inorganic materials 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- FDNAPBUWERUEDA-UHFFFAOYSA-N silicon tetrachloride Chemical compound Cl[Si](Cl)(Cl)Cl FDNAPBUWERUEDA-UHFFFAOYSA-N 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F17/00—Compounds of rare earth metals
- C01F17/30—Compounds containing rare earth metals and at least one element other than a rare earth metal, oxygen or hydrogen, e.g. La4S3Br6
- C01F17/32—Compounds containing rare earth metals and at least one element other than a rare earth metal, oxygen or hydrogen, e.g. La4S3Br6 oxide or hydroxide being the only anion, e.g. NaCeO2 or MgxCayEuO
- C01F17/34—Aluminates, e.g. YAlO3 or Y3-xGdxAl5O12
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/10—Oxides, borides, carbides, nitrides or silicides; Mixtures thereof
- C23C4/11—Oxides
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
- C23C4/123—Spraying molten metal
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Inorganic Chemistry (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Coating By Spraying Or Casting (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR20060055968 | 2006-06-21 | ||
| KR1020070060758A KR100939256B1 (ko) | 2006-06-21 | 2007-06-20 | 반도체 제조 장비용 열용사 코팅물질의 제조방법 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| TW200815624A TW200815624A (en) | 2008-04-01 |
| TWI375734B true TWI375734B (en) | 2012-11-01 |
Family
ID=39138889
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| TW096122264A TWI375734B (en) | 2006-06-21 | 2007-06-21 | Ceramic coating material for thermal spray on the parts of semiconductor processing devices and fabrication method and coating method thereof |
Country Status (2)
| Country | Link |
|---|---|
| KR (2) | KR100939256B1 (ko) |
| TW (1) | TWI375734B (ko) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100859672B1 (ko) * | 2007-12-31 | 2008-09-23 | 주식회사 코미코 | 용사 코팅 방법 |
| KR100863935B1 (ko) * | 2008-01-14 | 2008-11-18 | 주식회사 코미코 | 용사 코팅용 분말과 그 제조 방법 및 이를 이용한 코팅막의제조 방법 |
| KR100863456B1 (ko) * | 2008-01-14 | 2008-11-18 | 주식회사 코미코 | 용사 코팅용 분말 및 용사 코팅용 분말 제조 방법 |
| KR101101910B1 (ko) * | 2009-06-03 | 2012-01-02 | 한국과학기술연구원 | 반도체 제조 장비용 다성분계 열용사 코팅물질, 그 제조방법 및 코팅방법 |
| FI125358B (fi) * | 2010-07-09 | 2015-09-15 | Teknologian Tutkimuskeskus Vtt Oy | Termisesti ruiskutettu täysin amorfinen oksidipinnoite |
| KR101466967B1 (ko) | 2012-06-13 | 2014-12-15 | 한국과학기술연구원 | 내식성이 향상된 다성분계 열용사용 코팅물질, 그 제조방법 및 코팅방법 |
| US9343289B2 (en) * | 2012-07-27 | 2016-05-17 | Applied Materials, Inc. | Chemistry compatible coating material for advanced device on-wafer particle performance |
| KR101423515B1 (ko) * | 2012-09-03 | 2014-07-31 | 주식회사 테라세미콘 | 열처리 장치의 챔버 및 그 제조방법 |
| KR20240145683A (ko) | 2023-03-28 | 2024-10-07 | 에이씨에스(주) | 반도체 검사 설비의 워크피스 코팅 방법 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW514996B (en) * | 1999-12-10 | 2002-12-21 | Tokyo Electron Ltd | Processing apparatus with a chamber having therein a high-corrosion-resistant sprayed film |
-
2007
- 2007-06-20 KR KR1020070060758A patent/KR100939256B1/ko active IP Right Grant
- 2007-06-21 TW TW096122264A patent/TWI375734B/zh active
-
2009
- 2009-11-09 KR KR1020090107645A patent/KR100940812B1/ko active IP Right Grant
Also Published As
| Publication number | Publication date |
|---|---|
| KR100940812B1 (ko) | 2010-02-04 |
| KR20070121561A (ko) | 2007-12-27 |
| KR100939256B1 (ko) | 2010-01-29 |
| TW200815624A (en) | 2008-04-01 |
| KR20090125028A (ko) | 2009-12-03 |
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