KR100498814B1 - 텅스텐 막에 대한 연마 속도가 우수하고 안정성이 뛰어난화학-기계적 연마 슬러리 조성물 - Google Patents
텅스텐 막에 대한 연마 속도가 우수하고 안정성이 뛰어난화학-기계적 연마 슬러리 조성물 Download PDFInfo
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- KR100498814B1 KR100498814B1 KR10-2002-0063802A KR20020063802A KR100498814B1 KR 100498814 B1 KR100498814 B1 KR 100498814B1 KR 20020063802 A KR20020063802 A KR 20020063802A KR 100498814 B1 KR100498814 B1 KR 100498814B1
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- South Korea
- Prior art keywords
- acid
- slurry composition
- chemical
- mechanical polishing
- tungsten
- Prior art date
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- 238000005498 polishing Methods 0.000 title claims abstract description 112
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 title claims abstract description 73
- 239000010937 tungsten Substances 0.000 title claims abstract description 73
- 229910052721 tungsten Inorganic materials 0.000 title claims abstract description 72
- 239000000203 mixture Substances 0.000 title claims abstract description 68
- 239000002002 slurry Substances 0.000 title claims abstract description 65
- 239000006185 dispersion Substances 0.000 title claims abstract description 31
- 239000000126 substance Substances 0.000 title claims 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 35
- 150000007524 organic acids Chemical class 0.000 claims abstract description 24
- 229910052814 silicon oxide Inorganic materials 0.000 claims abstract description 14
- 239000007800 oxidant agent Substances 0.000 claims abstract description 13
- 239000003381 stabilizer Substances 0.000 claims abstract description 13
- 239000003623 enhancer Substances 0.000 claims abstract description 11
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims abstract description 10
- 150000003868 ammonium compounds Chemical class 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 230000001590 oxidative effect Effects 0.000 claims abstract description 8
- 239000003112 inhibitor Substances 0.000 claims abstract description 4
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 claims description 50
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 claims description 20
- 239000011976 maleic acid Substances 0.000 claims description 20
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 claims description 20
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 18
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 16
- KDYFGRWQOYBRFD-UHFFFAOYSA-N Succinic acid Natural products OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 claims description 16
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 claims description 14
- 229910021485 fumed silica Inorganic materials 0.000 claims description 14
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 claims description 12
- XNCSCQSQSGDGES-UHFFFAOYSA-N 2-[2-[bis(carboxymethyl)amino]propyl-(carboxymethyl)amino]acetic acid Chemical compound OC(=O)CN(CC(O)=O)C(C)CN(CC(O)=O)CC(O)=O XNCSCQSQSGDGES-UHFFFAOYSA-N 0.000 claims description 11
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 10
- 229910017604 nitric acid Inorganic materials 0.000 claims description 10
- 150000001875 compounds Chemical class 0.000 claims description 9
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 claims description 8
- TXXHDPDFNKHHGW-UHFFFAOYSA-N muconic acid Chemical compound OC(=O)C=CC=CC(O)=O TXXHDPDFNKHHGW-UHFFFAOYSA-N 0.000 claims description 8
- WLJVNTCWHIRURA-UHFFFAOYSA-N pimelic acid Chemical compound OC(=O)CCCCCC(O)=O WLJVNTCWHIRURA-UHFFFAOYSA-N 0.000 claims description 8
- 239000001361 adipic acid Substances 0.000 claims description 7
- 235000011037 adipic acid Nutrition 0.000 claims description 7
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 6
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 6
- 239000004310 lactic acid Substances 0.000 claims description 6
- 235000014655 lactic acid Nutrition 0.000 claims description 6
- 235000006408 oxalic acid Nutrition 0.000 claims description 6
- CXMXRPHRNRROMY-UHFFFAOYSA-N sebacic acid Chemical compound OC(=O)CCCCCCCCC(O)=O CXMXRPHRNRROMY-UHFFFAOYSA-N 0.000 claims description 6
- 239000001384 succinic acid Substances 0.000 claims description 6
- RTBFRGCFXZNCOE-UHFFFAOYSA-N 1-methylsulfonylpiperidin-4-one Chemical compound CS(=O)(=O)N1CCC(=O)CC1 RTBFRGCFXZNCOE-UHFFFAOYSA-N 0.000 claims description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 5
- 239000002253 acid Substances 0.000 claims description 5
- JFCQEDHGNNZCLN-UHFFFAOYSA-N anhydrous glutaric acid Natural products OC(=O)CCCC(O)=O JFCQEDHGNNZCLN-UHFFFAOYSA-N 0.000 claims description 5
- TXXHDPDFNKHHGW-CCAGOZQPSA-N Muconic acid Natural products OC(=O)\C=C/C=C\C(O)=O TXXHDPDFNKHHGW-CCAGOZQPSA-N 0.000 claims description 4
- WPYMKLBDIGXBTP-UHFFFAOYSA-N benzoic acid Chemical compound OC(=O)C1=CC=CC=C1 WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 claims description 4
- KDYFGRWQOYBRFD-NUQCWPJISA-N butanedioic acid Chemical compound O[14C](=O)CC[14C](O)=O KDYFGRWQOYBRFD-NUQCWPJISA-N 0.000 claims description 4
- LNTHITQWFMADLM-UHFFFAOYSA-N gallic acid Chemical compound OC(=O)C1=CC(O)=C(O)C(O)=C1 LNTHITQWFMADLM-UHFFFAOYSA-N 0.000 claims description 4
- GSWAOPJLTADLTN-UHFFFAOYSA-N oxidanimine Chemical compound [O-][NH3+] GSWAOPJLTADLTN-UHFFFAOYSA-N 0.000 claims description 4
- WHUUTDBJXJRKMK-UHFFFAOYSA-N Glutamic acid Natural products OC(=O)C(N)CCC(O)=O WHUUTDBJXJRKMK-UHFFFAOYSA-N 0.000 claims description 3
- WHUUTDBJXJRKMK-VKHMYHEASA-N L-glutamic acid Chemical compound OC(=O)[C@@H](N)CCC(O)=O WHUUTDBJXJRKMK-VKHMYHEASA-N 0.000 claims description 3
- 235000013922 glutamic acid Nutrition 0.000 claims description 3
- 239000004220 glutamic acid Substances 0.000 claims description 3
- BEQKKZICTDFVMG-UHFFFAOYSA-N 1,2,3,4,6-pentaoxepane-5,7-dione Chemical compound O=C1OOOOC(=O)O1 BEQKKZICTDFVMG-UHFFFAOYSA-N 0.000 claims description 2
- 239000005711 Benzoic acid Substances 0.000 claims description 2
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 claims description 2
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 claims description 2
- PDAVOLCVHOKLEO-UHFFFAOYSA-N acetyl benzenecarboperoxoate Chemical compound CC(=O)OOC(=O)C1=CC=CC=C1 PDAVOLCVHOKLEO-UHFFFAOYSA-N 0.000 claims description 2
- 235000010233 benzoic acid Nutrition 0.000 claims description 2
- CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical compound O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 claims description 2
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 claims description 2
- 235000015165 citric acid Nutrition 0.000 claims description 2
- 239000008119 colloidal silica Substances 0.000 claims description 2
- XBDQKXXYIPTUBI-UHFFFAOYSA-N dimethylselenoniopropionate Natural products CCC(O)=O XBDQKXXYIPTUBI-UHFFFAOYSA-N 0.000 claims description 2
- 235000004515 gallic acid Nutrition 0.000 claims description 2
- 229940074391 gallic acid Drugs 0.000 claims description 2
- DUWWHGPELOTTOE-UHFFFAOYSA-N n-(5-chloro-2,4-dimethoxyphenyl)-3-oxobutanamide Chemical compound COC1=CC(OC)=C(NC(=O)CC(C)=O)C=C1Cl DUWWHGPELOTTOE-UHFFFAOYSA-N 0.000 claims description 2
- SRSFOMHQIATOFV-UHFFFAOYSA-N octanoyl octaneperoxoate Chemical compound CCCCCCCC(=O)OOC(=O)CCCCCCC SRSFOMHQIATOFV-UHFFFAOYSA-N 0.000 claims description 2
- 235000019260 propionic acid Nutrition 0.000 claims description 2
- 235000002906 tartaric acid Nutrition 0.000 claims description 2
- 239000011975 tartaric acid Substances 0.000 claims description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims 1
- 229910052751 metal Inorganic materials 0.000 abstract description 30
- 239000002184 metal Substances 0.000 abstract description 30
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 22
- 239000002245 particle Substances 0.000 description 19
- 238000000034 method Methods 0.000 description 11
- 239000007788 liquid Substances 0.000 description 10
- 239000011229 interlayer Substances 0.000 description 8
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 239000003002 pH adjusting agent Substances 0.000 description 5
- 238000004062 sedimentation Methods 0.000 description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 238000005229 chemical vapour deposition Methods 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 235000019270 ammonium chloride Nutrition 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 3
- 230000015271 coagulation Effects 0.000 description 3
- 238000005345 coagulation Methods 0.000 description 3
- 238000000151 deposition Methods 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 235000005985 organic acids Nutrition 0.000 description 3
- 238000007517 polishing process Methods 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- XVOUMQNXTGKGMA-OWOJBTEDSA-N (E)-glutaconic acid Chemical compound OC(=O)C\C=C\C(O)=O XVOUMQNXTGKGMA-OWOJBTEDSA-N 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 2
- 238000001312 dry etching Methods 0.000 description 2
- -1 etc. may be used Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- BDJRBEYXGGNYIS-UHFFFAOYSA-N nonanedioic acid Chemical compound OC(=O)CCCCCCCC(O)=O BDJRBEYXGGNYIS-UHFFFAOYSA-N 0.000 description 2
- 238000005240 physical vapour deposition Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- TYFQFVWCELRYAO-UHFFFAOYSA-N suberic acid Chemical compound OC(=O)CCCCCCC(O)=O TYFQFVWCELRYAO-UHFFFAOYSA-N 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 238000007740 vapor deposition Methods 0.000 description 2
- YIWGJFPJRAEKMK-UHFFFAOYSA-N 1-(2H-benzotriazol-5-yl)-3-methyl-8-[2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carbonyl]-1,3,8-triazaspiro[4.5]decane-2,4-dione Chemical compound CN1C(=O)N(c2ccc3n[nH]nc3c2)C2(CCN(CC2)C(=O)c2cnc(NCc3cccc(OC(F)(F)F)c3)nc2)C1=O YIWGJFPJRAEKMK-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- NIPNSKYNPDTRPC-UHFFFAOYSA-N N-[2-oxo-2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 NIPNSKYNPDTRPC-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000003929 acidic solution Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000007853 buffer solution Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 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
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000001879 gelation Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 238000001020 plasma etching Methods 0.000 description 1
- 238000000623 plasma-assisted chemical vapour deposition Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 229910001930 tungsten oxide Inorganic materials 0.000 description 1
- 229910021642 ultra pure water Inorganic materials 0.000 description 1
- 239000012498 ultrapure water Substances 0.000 description 1
- 238000000733 zeta-potential measurement Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09G—POLISHING COMPOSITIONS; SKI WAXES
- C09G1/00—Polishing compositions
- C09G1/02—Polishing compositions containing abrasives or grinding agents
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/14—Anti-slip materials; Abrasives
- C09K3/1454—Abrasive powders, suspensions and pastes for polishing
- C09K3/1463—Aqueous liquid suspensions
-
- 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
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F3/00—Brightening metals by chemical means
- C23F3/04—Heavy metals
- C23F3/06—Heavy metals with acidic solutions
-
- 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
- H01L21/31—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to form insulating layers thereon, e.g. for masking or by using photolithographic techniques; After treatment of these layers; Selection of materials for these layers
- H01L21/3205—Deposition of non-insulating-, e.g. conductive- or resistive-, layers on insulating layers; After-treatment of these layers
- H01L21/321—After treatment
- H01L21/32115—Planarisation
- H01L21/3212—Planarisation by chemical mechanical polishing [CMP]
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Treatment Of Semiconductor (AREA)
Abstract
Description
유기산 | 함량 | 텅스텐 연마속도 (Å/min) | 15일후 연마액 실리카 입도(nm) | |
비교예 1 | 없음 | 0.0% | 605 | 침전 |
비교예 2 | 카본산 | 0.1% | 986 | 295 |
비교예 3 | 초산 | 0.1% | 1245 | 232 |
실시예 1 | 옥살산 | 0.1% | 2451 | 209 |
실시예 2 | 말론산 | 0.1% | 3851 | 208 |
실시예 3 | 숙신산 | 0.1% | 3654 | 211 |
실시예 4 | 글루타르산 | 0.1% | 3864 | 213 |
실시예 5 | 아디프산 | 0.1% | 3687 | 211 |
실시예 6 | 피멜산 | 0.1% | 3785 | 209 |
실시예 7 | 수벨산 | 0.1% | 2947 | 210 |
실시예 8 | 아제라산 | 0.1% | 2675 | 211 |
실시예 9 | 세박산 | 0.1% | 2482 | 225 |
실시예 10 | 말레산 | 0.1% | 3776 | 212 |
실시예 11 | 글루타콘산 | 0.1% | 3458 | 209 |
실시예 12 | 무콘산 | 0.1% | 3421 | 210 |
실시예 13 | 말론산+말레산 | 0.05+0.05% | 4102 | 203 |
실시예 14 | 숙신산+말레산 | 0.05+0.05% | 4085 | 204 |
실시예 15 | 글루타르산+말레산 | 0.05+0.05% | 3954 | 203 |
실시예 16 | 아디프산+말레산 | 0.05+0.05% | 3895 | 207 |
실시예 17 | 말론산+숙신산+말레산 | 0.04+0.03+0.03% | 4128 | 204 |
실시예 18 | 말론산+말레산+글루타콘산 | 0.04+0.03+0.03% | 4114 | 205 |
락틱산 (wt%) | 텅스텐 연마속도(Å/min) | 실리콘 산화막연마속도(Å/min) | 텅스텐/실리콘 산화막 선택비 | |
비교예 4 | 0 | 3771 | 156 | 24.2 : 1 |
실시예 19 | 0.05 | 3786 | 143 | 26.5 : 1 |
실시예 20 | 0.1 | 3684 | 37 | 99.6 : 1 |
실시예 21 | 0.2 | 3865 | 38 | 101.7 : 1 |
실시예 22 | 0.5 | 3754 | 39 | 96.3 : 1 |
실시예 23 | 5.0 | 1412 | 51 | 27.7 : 1 |
비교예 5 | HF 0.2% | 2541 | 117 | 21.7 : 1 |
시료 | 암모늄 화합물 | (wt%) | 침전(15일 후) | 제타 전위(mV) | 평균입도(초기, nm) | 평균입도(15일 후, nm) |
비교예 6 | 없음 | 0.0 | 침전 | -2 | 234 | 과량 응집 |
실시예 24 | 암모늄 옥사이드 | 0.1 | 없음 | -15 | 211 | 221 |
실시예 25 | 암모늄 클로라이드 | 0.1 | 없음 | -16 | 204 | 210 |
비교예 7 | EDTA | 0.1 | 침전 | -2 | 221 | 과량 응집 |
실시예 26 | EDTA·2H·2(NH4) | 0.05 | 없음 | -20 | 201 | 206 |
실시예 27 | EDTA·2H·2(NH4) | 0.1 | 없음 | -25 | 200 | 204 |
실시예 28 | PDTA·Fe·NH4·H2O | 0.05 | 없음 | -22 | 202 | 203 |
실시예 29 | PDTA·Fe·NH4·H2O | 0.1 | 없음 | -30 | 199 | 200 |
pH 조절제 | pH | 텅스텐연마속도(Å/min) | 분산 안정성 | |
비교예 8 | 없음 | 4.0 | 1578 | 좋음 |
실시예 30 | 질산 | 2.5 | 3851 | 좋음 |
비교예 9 | 인산 | 2.5 | 2102 | 좋음 |
비교예 10 | 불산 | 2.5 | 3758 | 침전 |
실시예 31 | 황산 | 2.5 | 2948 | 좋음 |
비교예 11 | 염산 | 2.5 | 1896 | 좋음 |
Claims (19)
- 실리콘 산화막 연마 억제제로서 락틱산을 0.001 내지 5.0중량% 포함하고, 연마제 0.1 내지 20.0중량%, 산화제 0.1 내지 10.0중량%, 2개의 카르복실기를 가지는 유기산을 포함하는 텅스텐 연마 향상제 0.001 내지 5.0중량%, 암모늄 화합물을 포함하는 분산안정제 0.001 내지 1.0중량%, 및 물을 포함하며, pH가 2 내지 6인 화학-기계적 연마 슬러리 조성물.
- 삭제
- 삭제
- 제1항에 있어서, 상기 연마제는 γ-알루미나, α-알루미나, 퓸드 실리카, 콜로이달 실리카, 세리아 및 이들의 혼합물로 이루어진 군으로부터 선택되는 것인 화학-기계적 연마 슬러리 조성물.
- 제4항에 있어서, 상기 연마제는 비표면적이 50 내지 200m2/g인 퓸드 실리카인 화학-기계적 연마 슬러리 조성물.
- 제1항에 있어서, 상기 산화제는 과산화수소, 퍼옥시디카보네이트, 옥타노일 퍼옥사이드, 아세틸벤조일 퍼옥사이드 및 이들의 혼합물로 이루어진 군으로부터 선택되는 화합물인 화학-기계적 연마 슬러리 조성물.
- 제1항에 있어서, 상기 텅스텐 연마 향상제는 옥살산, 말론산, 숙신산, 글루타르산, 아디프산, 피멜산, 수벨산, 아제라산, 세박산, 글루타콘산, 무콘산 및 이들의 혼합물로 이루어진 군으로부터 선택되는 화합물과 말레산의 혼합물으로 이루어진 화학-기계적 연마 슬러리 조성물.
- 삭제
- 삭제
- 삭제
- 제7항에 있어서, 상기 텅스텐 연마 향상제는 0.01 내지 2.0중량%의 말론산과 0.01 내지 2.0중량%의 말레산의 혼합물인 화학-기계적 연마 슬러리 조성물.
- 제7항에 있어서, 상기 텅스텐 연마 향상제는 0.01 내지 2.0중량%의 숙신산과 0.01 내지 2.0중량%의 말레산의 혼합물인 화학-기계적 연마 슬러리 조성물.
- 제7항에 있어서, 상기 텅스텐 연마 향상제는 0.01 내지 2.0중량%의 아디프산과 0.01 내지 2.0중량%의 말레산의 혼합물인 화학-기계적 연마 슬러리 조성물.
- 제7항에 있어서, 상기 텅스텐 연마 향상제는 0.01 내지 2.0중량%의 말론산과 0.01 내지 2.0중량%의 숙신산과 0.01 내지 2.0중량%의 말레산의 혼합물인 화학-기계적 연마 슬러리 조성물.
- 삭제
- 제1항에 있어, 상기 분산안정제는 암모늄 옥사이드, 암모늄 클로라이드, 에틸렌디아민 테트라아세트산·2H·2(NH4), 프로필렌디아민 테트라아세트산·Fe·NH4·H2O 및 이들의 혼합물로 이루어진 군으로부터 선택되는 화합물인 화학-기계적 연마 슬러리 조성물.
- 제16항에 있어, 상기 분산안정제는 0.001 내지 1.0중량%의 에틸렌디아민 테트라아세트산·2H·2(NH4), 프로필렌디아민 테트라아세트산·Fe·NH4·H2O 및 이들의 혼합물로 이루어진 군으로부터 선택되는 화합물인 화학-기계적 연마 슬러리 조성물.
- 제1항에 있어서, 상기 pH는 질산, 황산, 락틱산, 타르타르산, 시트르산, 옥살산, 벤조산, 갈릭산, 프로판산, 말론산 및 이들의 혼합물로 이루어진 군으로부터 선택되는 화합물에 의하여 조절되는 것인 화학-기계적 연마 슬러리 조성물.
- 제18항에 있어서, 상기 pH는 질산 및 질산 혼합물로 이루어진 군으로부터 선택되는 화합물에 의하여 조절되는 것인 화학-기계적 연마 슬러리 조성물.
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