JP6612789B2 - タングステンの化学機械研磨組成物 - Google Patents
タングステンの化学機械研磨組成物 Download PDFInfo
- Publication number
- JP6612789B2 JP6612789B2 JP2016574914A JP2016574914A JP6612789B2 JP 6612789 B2 JP6612789 B2 JP 6612789B2 JP 2016574914 A JP2016574914 A JP 2016574914A JP 2016574914 A JP2016574914 A JP 2016574914A JP 6612789 B2 JP6612789 B2 JP 6612789B2
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- JP
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- Prior art keywords
- colloidal silica
- abrasive particles
- acid
- silica abrasive
- particles
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000005498 polishing Methods 0.000 title claims description 260
- 239000000203 mixture Substances 0.000 title claims description 258
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical group [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 title claims description 93
- 239000010937 tungsten Substances 0.000 title claims description 93
- 229910052721 tungsten Inorganic materials 0.000 title claims description 86
- 239000000126 substance Substances 0.000 title claims description 48
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 276
- 239000002245 particle Substances 0.000 claims description 262
- 239000008119 colloidal silica Substances 0.000 claims description 218
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 123
- -1 aminosilane compound Chemical class 0.000 claims description 103
- 229910052742 iron Inorganic materials 0.000 claims description 61
- 238000000034 method Methods 0.000 claims description 55
- 239000013626 chemical specie Substances 0.000 claims description 52
- 239000000758 substrate Substances 0.000 claims description 49
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 claims description 46
- 239000006185 dispersion Substances 0.000 claims description 44
- 150000001875 compounds Chemical class 0.000 claims description 43
- 239000011164 primary particle Substances 0.000 claims description 35
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 34
- 239000003054 catalyst Substances 0.000 claims description 32
- 239000007788 liquid Substances 0.000 claims description 32
- 239000003381 stabilizer Substances 0.000 claims description 28
- FZHAPNGMFPVSLP-UHFFFAOYSA-N silanamine Chemical compound [SiH3]N FZHAPNGMFPVSLP-UHFFFAOYSA-N 0.000 claims description 26
- 239000000463 material Substances 0.000 claims description 24
- 239000007800 oxidant agent Substances 0.000 claims description 24
- 125000003277 amino group Chemical group 0.000 claims description 22
- 150000001412 amines Chemical group 0.000 claims description 21
- 229910052757 nitrogen Inorganic materials 0.000 claims description 21
- 230000008569 process Effects 0.000 claims description 20
- 239000000377 silicon dioxide Substances 0.000 claims description 20
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 17
- 239000011258 core-shell material Substances 0.000 claims description 15
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 claims description 14
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 12
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 12
- UMVBXBACMIOFDO-UHFFFAOYSA-N [N].[Si] Chemical compound [N].[Si] UMVBXBACMIOFDO-UHFFFAOYSA-N 0.000 claims description 11
- 125000004432 carbon atom Chemical group C* 0.000 claims description 11
- 229920000642 polymer Polymers 0.000 claims description 11
- OBNDGIHQAIXEAO-UHFFFAOYSA-N [O].[Si] Chemical compound [O].[Si] OBNDGIHQAIXEAO-UHFFFAOYSA-N 0.000 claims description 10
- 239000002253 acid Substances 0.000 claims description 10
- XNGIFLGASWRNHJ-UHFFFAOYSA-N phthalic acid Chemical compound OC(=O)C1=CC=CC=C1C(O)=O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 claims description 10
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 9
- 125000000217 alkyl group Chemical group 0.000 claims description 8
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 7
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 7
- 239000001361 adipic acid Substances 0.000 claims description 7
- 235000011037 adipic acid Nutrition 0.000 claims description 7
- 229910052698 phosphorus Inorganic materials 0.000 claims description 7
- 239000011574 phosphorus Substances 0.000 claims description 7
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 6
- TXXHDPDFNKHHGW-UHFFFAOYSA-N muconic acid Chemical compound OC(=O)C=CC=CC(O)=O TXXHDPDFNKHHGW-UHFFFAOYSA-N 0.000 claims description 6
- WLJVNTCWHIRURA-UHFFFAOYSA-N pimelic acid Chemical compound OC(=O)CCCCCC(O)=O WLJVNTCWHIRURA-UHFFFAOYSA-N 0.000 claims description 6
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 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
- TYFQFVWCELRYAO-UHFFFAOYSA-N suberic acid Chemical compound OC(=O)CCCCCCC(O)=O TYFQFVWCELRYAO-UHFFFAOYSA-N 0.000 claims description 6
- 235000006408 oxalic acid Nutrition 0.000 claims description 5
- RTBFRGCFXZNCOE-UHFFFAOYSA-N 1-methylsulfonylpiperidin-4-one Chemical compound CS(=O)(=O)N1CCC(=O)CC1 RTBFRGCFXZNCOE-UHFFFAOYSA-N 0.000 claims description 4
- 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 4
- 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 4
- KDYFGRWQOYBRFD-UHFFFAOYSA-N Succinic acid Natural products OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 claims description 4
- 150000007513 acids Chemical class 0.000 claims description 4
- JFCQEDHGNNZCLN-UHFFFAOYSA-N anhydrous glutaric acid Natural products OC(=O)CCCC(O)=O JFCQEDHGNNZCLN-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
- 239000004202 carbamide Substances 0.000 claims description 4
- 235000015165 citric acid Nutrition 0.000 claims description 4
- 239000006193 liquid solution Substances 0.000 claims description 4
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 claims description 4
- 239000011976 maleic acid Substances 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 150000003141 primary amines Chemical class 0.000 claims description 4
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 claims description 4
- XVOUMQNXTGKGMA-OWOJBTEDSA-N (E)-glutaconic acid Chemical compound OC(=O)C\C=C\C(O)=O XVOUMQNXTGKGMA-OWOJBTEDSA-N 0.000 claims description 3
- 125000000022 2-aminoethyl group Chemical group [H]C([*])([H])C([H])([H])N([H])[H] 0.000 claims description 3
- 125000000954 2-hydroxyethyl group Chemical group [H]C([*])([H])C([H])([H])O[H] 0.000 claims description 3
- CKLJMWTZIZZHCS-REOHCLBHSA-N L-aspartic acid Chemical compound OC(=O)[C@@H](N)CC(O)=O CKLJMWTZIZZHCS-REOHCLBHSA-N 0.000 claims description 3
- TXXHDPDFNKHHGW-CCAGOZQPSA-N Muconic acid Natural products OC(=O)\C=C/C=C\C(O)=O TXXHDPDFNKHHGW-CCAGOZQPSA-N 0.000 claims description 3
- 229920002873 Polyethylenimine Polymers 0.000 claims description 3
- 235000003704 aspartic acid Nutrition 0.000 claims description 3
- YOUGRGFIHBUKRS-UHFFFAOYSA-N benzyl(trimethyl)azanium Chemical compound C[N+](C)(C)CC1=CC=CC=C1 YOUGRGFIHBUKRS-UHFFFAOYSA-N 0.000 claims description 3
- OQFSQFPPLPISGP-UHFFFAOYSA-N beta-carboxyaspartic acid Natural products OC(=O)C(N)C(C(O)=O)C(O)=O OQFSQFPPLPISGP-UHFFFAOYSA-N 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 239000000178 monomer Substances 0.000 claims description 3
- 239000000539 dimer Substances 0.000 claims description 2
- CBXCPBUEXACCNR-UHFFFAOYSA-N tetraethylammonium Chemical compound CC[N+](CC)(CC)CC CBXCPBUEXACCNR-UHFFFAOYSA-N 0.000 claims description 2
- 125000001181 organosilyl group Chemical group [SiH3]* 0.000 claims 1
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 59
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 32
- 239000010410 layer Substances 0.000 description 26
- 235000012431 wafers Nutrition 0.000 description 26
- 239000000243 solution Substances 0.000 description 24
- 239000003112 inhibitor Substances 0.000 description 17
- 229910000608 Fe(NO3)3.9H2O Inorganic materials 0.000 description 15
- 239000012141 concentrate Substances 0.000 description 14
- 239000002002 slurry Substances 0.000 description 14
- 229910052814 silicon oxide Inorganic materials 0.000 description 13
- 241000894007 species Species 0.000 description 13
- DHMQDGOQFOQNFH-UHFFFAOYSA-N Glycine Chemical compound NCC(O)=O DHMQDGOQFOQNFH-UHFFFAOYSA-N 0.000 description 10
- 229910052581 Si3N4 Inorganic materials 0.000 description 10
- 230000000694 effects Effects 0.000 description 10
- SZQUEWJRBJDHSM-UHFFFAOYSA-N iron(3+);trinitrate;nonahydrate Chemical compound O.O.O.O.O.O.O.O.O.[Fe+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O SZQUEWJRBJDHSM-UHFFFAOYSA-N 0.000 description 10
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 10
- WGTYBPLFGIVFAS-UHFFFAOYSA-M tetramethylammonium hydroxide Chemical compound [OH-].C[N+](C)(C)C WGTYBPLFGIVFAS-UHFFFAOYSA-M 0.000 description 10
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 9
- 238000001914 filtration Methods 0.000 description 9
- 239000000654 additive Substances 0.000 description 8
- 239000003139 biocide Substances 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 8
- 230000003628 erosive effect Effects 0.000 description 8
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 8
- 230000002378 acidificating effect Effects 0.000 description 7
- 230000003115 biocidal effect Effects 0.000 description 7
- 238000009826 distribution Methods 0.000 description 7
- 230000001590 oxidative effect Effects 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
- 229910001930 tungsten oxide Inorganic materials 0.000 description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 6
- 238000003917 TEM image Methods 0.000 description 6
- 239000003513 alkali Substances 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 238000004381 surface treatment Methods 0.000 description 6
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 5
- 239000004471 Glycine Substances 0.000 description 5
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 5
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 5
- 230000002776 aggregation Effects 0.000 description 5
- 239000007864 aqueous solution Substances 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 5
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- 229910052802 copper Inorganic materials 0.000 description 5
- 239000010949 copper Substances 0.000 description 5
- 239000008367 deionised water Substances 0.000 description 5
- 229910021641 deionized water Inorganic materials 0.000 description 5
- 229960002449 glycine Drugs 0.000 description 5
- 229910017604 nitric acid Inorganic materials 0.000 description 5
- 230000009467 reduction Effects 0.000 description 5
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- LFQCEHFDDXELDD-UHFFFAOYSA-N tetramethyl orthosilicate Chemical compound CO[Si](OC)(OC)OC LFQCEHFDDXELDD-UHFFFAOYSA-N 0.000 description 5
- 238000000108 ultra-filtration Methods 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 4
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- 239000012452 mother liquor Substances 0.000 description 4
- BDJRBEYXGGNYIS-UHFFFAOYSA-N nonanedioic acid Chemical compound OC(=O)CCCCCCCC(O)=O BDJRBEYXGGNYIS-UHFFFAOYSA-N 0.000 description 4
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- LZZYPRNAOMGNLH-UHFFFAOYSA-M Cetrimonium bromide Chemical compound [Br-].CCCCCCCCCCCCCCCC[N+](C)(C)C LZZYPRNAOMGNLH-UHFFFAOYSA-M 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 3
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- 239000004472 Lysine Substances 0.000 description 3
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
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- VLTRZXGMWDSKGL-UHFFFAOYSA-N perchloric acid Chemical class OCl(=O)(=O)=O VLTRZXGMWDSKGL-UHFFFAOYSA-N 0.000 description 3
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- 229910002554 Fe(NO3)3·9H2O Inorganic materials 0.000 description 2
- ZDXPYRJPNDTMRX-VKHMYHEASA-N L-glutamine Chemical compound OC(=O)[C@@H](N)CCC(N)=O ZDXPYRJPNDTMRX-VKHMYHEASA-N 0.000 description 2
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- ABLZXFCXXLZCGV-UHFFFAOYSA-N Phosphorous acid Chemical class OP(O)=O ABLZXFCXXLZCGV-UHFFFAOYSA-N 0.000 description 2
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- DSDVUXRTYBTVRN-UHFFFAOYSA-N dimethyl(tetradecyl)azanium;bromide Chemical compound [Br-].CCCCCCCCCCCCCC[NH+](C)C DSDVUXRTYBTVRN-UHFFFAOYSA-N 0.000 description 2
- 238000004821 distillation Methods 0.000 description 2
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- 125000000524 functional group Chemical group 0.000 description 2
- ZDXPYRJPNDTMRX-UHFFFAOYSA-N glutamine Natural products OC(=O)C(N)CCC(N)=O ZDXPYRJPNDTMRX-UHFFFAOYSA-N 0.000 description 2
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- 150000002500 ions Chemical class 0.000 description 2
- VCJMYUPGQJHHFU-UHFFFAOYSA-N iron(3+);trinitrate Chemical compound [Fe+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O VCJMYUPGQJHHFU-UHFFFAOYSA-N 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
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- 238000007254 oxidation reaction Methods 0.000 description 2
- VLTRZXGMWDSKGL-UHFFFAOYSA-M perchlorate Inorganic materials [O-]Cl(=O)(=O)=O VLTRZXGMWDSKGL-UHFFFAOYSA-M 0.000 description 2
- 125000000864 peroxy group Chemical group O(O*)* 0.000 description 2
- NNPKVBBGSBIZFD-UHFFFAOYSA-N phosphane silane Chemical class [SiH4].P NNPKVBBGSBIZFD-UHFFFAOYSA-N 0.000 description 2
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- WGYKZJWCGVVSQN-UHFFFAOYSA-N propylamine Chemical compound CCCN WGYKZJWCGVVSQN-UHFFFAOYSA-N 0.000 description 2
- FSYKKLYZXJSNPZ-UHFFFAOYSA-N sarcosine Chemical compound C[NH2+]CC([O-])=O FSYKKLYZXJSNPZ-UHFFFAOYSA-N 0.000 description 2
- 150000003335 secondary amines Chemical class 0.000 description 2
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 2
- 125000005373 siloxane group Chemical group [SiH2](O*)* 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
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- NNHHDJVEYQHLHG-UHFFFAOYSA-N potassium silicate Chemical compound [K+].[K+].[O-][Si]([O-])=O NNHHDJVEYQHLHG-UHFFFAOYSA-N 0.000 description 1
- 229910052913 potassium silicate Inorganic materials 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- UBQKCCHYAOITMY-UHFFFAOYSA-N pyridin-2-ol Chemical compound OC1=CC=CC=N1 UBQKCCHYAOITMY-UHFFFAOYSA-N 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 125000001453 quaternary ammonium group Chemical group 0.000 description 1
- 150000003254 radicals Chemical class 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 239000004627 regenerated cellulose Substances 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229940043230 sarcosine Drugs 0.000 description 1
- 238000005201 scrubbing Methods 0.000 description 1
- SCPYDCQAZCOKTP-UHFFFAOYSA-N silanol Chemical compound [SiH3]O SCPYDCQAZCOKTP-UHFFFAOYSA-N 0.000 description 1
- PFUVRDFDKPNGAV-UHFFFAOYSA-N sodium peroxide Chemical compound [Na+].[Na+].[O-][O-] PFUVRDFDKPNGAV-UHFFFAOYSA-N 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- KDYFGRWQOYBRFD-UHFFFAOYSA-L succinate(2-) Chemical compound [O-]C(=O)CCC([O-])=O KDYFGRWQOYBRFD-UHFFFAOYSA-L 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 239000003760 tallow Substances 0.000 description 1
- 235000002906 tartaric acid Nutrition 0.000 description 1
- 239000011975 tartaric acid Substances 0.000 description 1
- DZLFLBLQUQXARW-UHFFFAOYSA-N tetrabutylammonium Chemical compound CCCC[N+](CCCC)(CCCC)CCCC DZLFLBLQUQXARW-UHFFFAOYSA-N 0.000 description 1
- BJQWBACJIAKDTJ-UHFFFAOYSA-N tetrabutylphosphanium Chemical compound CCCC[P+](CCCC)(CCCC)CCCC BJQWBACJIAKDTJ-UHFFFAOYSA-N 0.000 description 1
- FAGUFWYHJQFNRV-UHFFFAOYSA-N tetraethylenepentamine Chemical compound NCCNCCNCCNCCN FAGUFWYHJQFNRV-UHFFFAOYSA-N 0.000 description 1
- SZWHXXNVLACKBV-UHFFFAOYSA-N tetraethylphosphanium Chemical compound CC[P+](CC)(CC)CC SZWHXXNVLACKBV-UHFFFAOYSA-N 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- QEMXHQIAXOOASZ-UHFFFAOYSA-N tetramethylammonium Chemical compound C[N+](C)(C)C QEMXHQIAXOOASZ-UHFFFAOYSA-N 0.000 description 1
- DDFYFBUWEBINLX-UHFFFAOYSA-M tetramethylammonium bromide Chemical compound [Br-].C[N+](C)(C)C DDFYFBUWEBINLX-UHFFFAOYSA-M 0.000 description 1
- AGGKEGLBGGJEBZ-UHFFFAOYSA-N tetramethylenedisulfotetramine Chemical compound C1N(S2(=O)=O)CN3S(=O)(=O)N1CN2C3 AGGKEGLBGGJEBZ-UHFFFAOYSA-N 0.000 description 1
- BXYHVFRRNNWPMB-UHFFFAOYSA-N tetramethylphosphanium Chemical compound C[P+](C)(C)C BXYHVFRRNNWPMB-UHFFFAOYSA-N 0.000 description 1
- GJSGYPDDPQRWPK-UHFFFAOYSA-N tetrapentylammonium Chemical compound CCCCC[N+](CCCCC)(CCCCC)CCCCC GJSGYPDDPQRWPK-UHFFFAOYSA-N 0.000 description 1
- USFPINLPPFWTJW-UHFFFAOYSA-N tetraphenylphosphonium Chemical compound C1=CC=CC=C1[P+](C=1C=CC=CC=1)(C=1C=CC=CC=1)C1=CC=CC=C1 USFPINLPPFWTJW-UHFFFAOYSA-N 0.000 description 1
- OSBSFAARYOCBHB-UHFFFAOYSA-N tetrapropylammonium Chemical compound CCC[N+](CCC)(CCC)CCC OSBSFAARYOCBHB-UHFFFAOYSA-N 0.000 description 1
- XOGCTUKDUDAZKA-UHFFFAOYSA-N tetrapropylphosphanium Chemical compound CCC[P+](CCC)(CCC)CCC XOGCTUKDUDAZKA-UHFFFAOYSA-N 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 125000005369 trialkoxysilyl group Chemical group 0.000 description 1
- ALYGOOWRCDZDTJ-UHFFFAOYSA-L tributyl-[6-(tributylazaniumyl)hexyl]azanium;dihydroxide Chemical compound [OH-].[OH-].CCCC[N+](CCCC)(CCCC)CCCCCC[N+](CCCC)(CCCC)CCCC ALYGOOWRCDZDTJ-UHFFFAOYSA-L 0.000 description 1
- HLXQFVXURMXRPU-UHFFFAOYSA-L trimethyl-[10-(trimethylazaniumyl)decyl]azanium;dibromide Chemical compound [Br-].[Br-].C[N+](C)(C)CCCCCCCCCC[N+](C)(C)C HLXQFVXURMXRPU-UHFFFAOYSA-L 0.000 description 1
- 150000003658 tungsten compounds Chemical class 0.000 description 1
- OUYCCCASQSFEME-UHFFFAOYSA-N tyrosine Natural products OC(=O)C(N)CC1=CC=C(O)C=C1 OUYCCCASQSFEME-UHFFFAOYSA-N 0.000 description 1
- 235000002374 tyrosine Nutrition 0.000 description 1
- AQLJVWUFPCUVLO-UHFFFAOYSA-N urea hydrogen peroxide Chemical compound OO.NC(N)=O AQLJVWUFPCUVLO-UHFFFAOYSA-N 0.000 description 1
- 239000004474 valine Substances 0.000 description 1
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Description
タングステン及び酸化ケイ素(TEOS)の研磨速度を、様々な研磨組成物に対してこの例の中で評価した。この例はコロイダルシリカ、鉄含有促進剤、酸化剤、及びコロイダルシリカの平均粒子サイズの、タングステン及びTEOSの研磨速度への影響を実証した。アミノプロピルトリアルコキシシラン(アミノシラン)を加水分解した又は部分的に加水分解したコアシェル構造を有するコロイダルシリカ研磨剤粒子を含んだ研磨組成物1A〜1Eのそれぞれを、例11において以下で説明するのと同様の手順を使用してシェル中に組み込んだ。組成物1A〜1C及び1Eは60nmの平均粒子サイズを有し、組成物1Dは48nmの平均粒子サイズを有した。研磨組成物1Fは、扶桑化学工業株式会社(東京、日本)から入手可能なPL2コロイダルシリカを含んでいた。上で説明したコロイダルシリカ研磨剤粒子を含む濃縮した分散体を、硝酸第2鉄9水和物(Fe(NO3)3・9H2O)と水との混合物に加えて関連する研磨組成物を得た。次いで、過酸化水素を組成物1C〜1Eに加えた。組成物1A〜1Fのそれぞれは1wt%のコロイダルシリカを含んでいた。表1Aはコロイダルシリカの粒子サイズと、過酸化水素及びFe(NO3)3・9H2Oの濃度とを示す。
タングステンエッチ速度、コロイダルシリカのゼータ電位、及び研磨組成物の電気伝導度を、様々な研磨組成物に対してこの例の中で評価した。この例は、様々なタングステンエッチ防止剤のこれらの指標への影響を実証した。アミノプロピルトリアルコキシシランを加水分解した又は部分的に加水分解したコアシェル構造を有するコロイダルシリカ研磨剤粒子を含んだ研磨組成物2A〜2Kのそれぞれを、例11において以下で説明するのと同様の手順を使用してシェル中に組み込んだ。次いで、上で説明したコロイダルシリカ研磨剤粒子を含んだ濃縮した分散体を、マロン酸と硝酸第2鉄9水和物(Fe(NO3)3・9H2O)と水とを含む混合物に加えて、組成物中の最終的な濃度は以下のとおり、1.0wt%のコロイダルシリカ、30ppmの硝酸第2鉄9水和物、及び61.8ppmのマロン酸であった。次いで、各組成物のpHを、硝酸を使用して4.0に調整した。
タングステン及び酸化ケイ素(TEOS)の研磨速度を、様々な研磨組成物に対してこの例の中で評価した。この例は、鉄濃度及び様々なタングステンエッチ防止剤の、研磨速度への影響を実証した。アミノプロピルトリアルコキシシランを加水分解した又は部分的に加水分解したコアシェル構造を有するコロイダルシリカ研磨剤粒子を含んだ研磨組成物3A〜3Iのそれぞれを、例11において以下で説明するのと同様の手順を使用してシェル中に組み込んだ。次いで、上で説明したコロイダルシリカ研磨剤粒子を含んだ濃縮した分散体を、マロン酸と硝酸第2鉄9水和物(Fe(NO3)3・9H2O)と水とを含む混合物に加えて、様々な研磨組成物を得た。関連するタングステンエッチ防止剤を各組成物に加えた。組成物のそれぞれは、約55nmの平均粒子サイズを有するコロイダルシリカ研磨剤粒子のため、0.5wt%を含んでいた。各組成物は、2.0wt%の過酸化水素、及び鉄イオンあたり8.0当量のマロン酸を、3.0のpH(硝酸を使用して調整)でさらに含んでいた。表3Aは、組成物3A〜3Iのそれぞれに対するFe(NO3)3・9H2Oの濃度及びタングステンエッチ防止剤を示す。
タングステン、チタン、及び酸化ケイ素(TEOS)の研磨速度と酸化物エロージョンを、2つの研磨組成物に対してこの例の中で評価した。この例は、コロイダルシリカ研磨剤粒子のこれらの指標への効果を実証した。アミノプロピルトリアルコキシシランを加水分解した又は部分的に加水分解したコアシェル構造を有するコロイダルシリカ研磨剤粒子を含んだ研磨組成物4Aを、例11において以下で説明するのと同様の手順を使用してシェル中に組み込んだ。平均粒子サイズは約55nmであった。次いで、上で説明したコロイダルシリカ研磨剤粒子を含んだ濃縮した分散体を、マロン酸と硝酸第2鉄9水和物と水とを含む混合物に加えた。対照組成物は、3−(アミノプロピル)トリメトキシルシランで表面処理した100nmのコロイダルシリカを含んでいた。研磨組成物のそれぞれは、0.5wt%の関連するコロイダルシリカを含んでいた。研磨組成物は、2.0wt%の過酸化水素、307ppmのFe(NO3)3・9H2O、668ppmのマロン酸、40ppmのタングステンエッチ防止剤、及び8ppmのKathon(登録商標)殺生物剤を、pH2.3(硝酸を使用して調整)でさらに含んでいた。
タングステン及び酸化ケイ素(TEOS)の研磨速度を、2つの研磨組成物に対してこの例の中で評価した。この例は、鉄濃度及びタングステンエッチ防止剤濃度の、タングステン及びTEOSの研磨速度への効果を実証した。アミノプロピルトリアルコキシシランを加水分解した又は部分的に加水分解したコアシェル構造を有するコロイダルシリカ研磨剤粒子を含んだ研磨組成物5A〜5Fを、例11において以下で説明するのと同様の手順を使用してシェル中に組み込んだ。次いで、上で説明したコロイダルシリカ研磨剤粒子を含んだ濃縮した分散体を、マロン酸と硝酸第2鉄9水和物(Fe(NO3)3・9H2O)と水とを含む混合物に加えた。各組成物は、約55nmの平均粒子サイズを有する2.0wt%のコロイダルシリカを含んでいた。組成物は、2.0wt%の過酸化水素、及び8:1の一定モル比のマロン酸:Fe(NO3)3・9H2Oを、4.0のpHで含んでいた。Fe(NO3)3・9H2O及びタングステンエッチ防止剤の濃度を表5Aで示す。
タングステン及び酸化ケイ素(TEOS)の研磨速度を、2つの研磨組成物に対してこの例の中で評価した。この例は、鉄濃度及びタングステンエッチ防止剤濃度の、タングステン及びTEOSの研磨速度への効果を実証した。アミノプロピルトリアルコキシシランを加水分解した又は部分的に加水分解したコアシェル構造を有するコロイダルシリカ研磨剤粒子を含んだ研磨組成物6A〜6Eを、例11において以下で説明するのと同様の手順を使用してシェル中に組み込んだ。次いで、上で説明したコロイダルシリカ研磨剤粒子を含んだ濃縮した分散体を、マロン酸と硝酸第2鉄9水和物(Fe(NO3)3・9H2O)と水とを含む混合物に加えた。各組成物は、約55nmの平均粒子サイズを有する3.0wt%のコロイダルシリカを含んでいた。組成物は、8:1の一定モル比のマロン酸:Fe(NO3)3・9H2O、及び37ppmのタングステンエッチ防止剤を、4.0のpHで含んでいた。Fe(NO3)3・9H2O及び過酸化水素の濃度を表6Aで示す。
タングステン、酸化ケイ素(TEOS)、及び窒化ケイ素(SiN)の研磨速度を、2つの研磨組成物に対してこの例の中で評価した。この例は、リン酸追加の、タングステン、TEOS、及びSiNの研磨速度への効果を実証した。アミノプロピルトリアルコキシシランを加水分解した又は部分的に加水分解したコアシェル構造を有するコロイダルシリカ研磨剤粒子を含んだ研磨組成物7A〜7Dを、例11において以下で説明するのと同様の手順を使用してシェル中に組み込んだ。次いで、上で説明したコロイダルシリカ研磨剤粒子を含んだ濃縮した分散体を、マロン酸と硝酸第2鉄9水和物(Fe(NO3)3・9H2O)と水とを含む混合物に加えた。各組成物は、約55nmの平均粒子サイズを有する2.0wt%のコロイダルシリカを含んでいた。各組成物は、2.0wt%の過酸化水素、20ppmのFe(NO3)3・9H2O、8:1の一定モル比のマロン酸:Fe(NO3)3・9H2O、及び500ppmのグリシン、Dequest(登録商標)2010を、3.0のpHで含んでいた。
タングステン及び酸化ケイ素(TEOS)の研磨速度を、2つのタングステンバフ研磨の研磨組成物に対してこの例の中で評価した。比較の研磨組成物8Aは、扶桑化学工業株式会社(東京、日本)から入手可能なPL−3Cを含んでいた。PL−3Cは表面が処理されたコロイダルシリカであり、コロイダルシリカの表面がアミノプロピルトリアルコキシシランで処理される(と結合する)。平均粒子サイズは約0.07μmであった。アミノプロピルトリアルコキシシランを加水分解した又は部分的に加水分解したコアシェル構造を有するコロイダルシリカ研磨剤粒子を含んだ研磨組成物8Bを、例11において以下で説明するのと同様の手順を使用してシェル中に組み込んだ。平均粒子サイズは約0.06μmであった。次いで、上で説明したコロイダルシリカ研磨剤粒子を含んだ濃縮した分散体を、マロン酸と硝酸第2鉄9水和物と水とを含む混合物に加えた。研磨組成物のそれぞれ(8A及び8B)は、10wtppmのFe(NO3)3・9H2O、60wtppmのマロン酸、500wtppmのグリシン、2.0wt%の関連するコロイダルシリカ研磨剤粒子、及び2wt%の過酸化水素を、4.0のpHで含んでいた。
2つの濃縮した研磨組成物の貯蔵寿命安定性をこの例の中で評価した。比較の研磨組成物8Aは、扶桑化学工業株式会社(東京、日本)から入手可能なPL−3Cを含んでいた。PL−3Cは表面が処理されたコロイダルシリカであり、コロイダルシリカの表面がアミノプロピルトリアルコキシシランで処理される(と結合する)。平均粒子サイズは約0.07μmであった。アミノプロピルトリアルコキシシランを加水分解した又は部分的に加水分解したコアシェル構造を有するコロイダルシリカ研磨剤粒子を含んだ研磨組成物8Bを、例11において以下で説明するのと同様の手順を使用してシェル中に組み込んだ。平均粒子サイズは約0.06μmであった。次いで、上で説明したコロイダルシリカ研磨剤粒子を含んだ濃縮した分散体を、マロン酸と硝酸第2鉄9水和物と水とを含む混合物に加えた。組成物のそれぞれ(8A及び8B)は、4.0wt%の個別のコロイダルシリカ、20wtppmのFe(NO3)3・9H2O、100wtppmのマロン酸、及び0.1wtのグリシンを、4.0のpHで含んでいた。表9は2つの組成物に対する貯蔵寿命安定性を示す。
パターン化酸化ケイ素(TEOS)の研磨速度並びに酸化物エロージョンを、2つの研磨組成物に対してこの例の中で評価した。研磨組成物は、例8で評価したものと同一であった。したがって、研磨組成物10Aは研磨組成物8Aと同一であり、研磨組成物10Bは研磨組成物8Bと同一であった。
化学機械研磨組成物を以下のように調製した。2064gの量のBS−1Hコロイダルシリカ分散体(扶桑化学工業株式会社(東京、日本)から入手可能な、約35nmの平均粒子サイズを有する10.5wt%のコロイダルシリカ分散体)を、5882gのDI水に加えた。3−エトキシプロピルアミン(EOPA)をその混合物に加えて、pHを10に調整して、それによって母液を生成した。次いで、母液を80℃まで加熱した。1872.3gのテトラメトキシシランと16.3gの3−アミノプロピルトリメトキシシランとの混合物を、180分間の間、一定速度で(約10.5g/分の速度で)母液に加え、液体温度を80℃で維持した。アミノシラン(又は加水分解した又は部分的に加水分化したアミノシラン)を含有する外部にシリカシェルを有するコロイダルシリカ粒子を含むコロイダルシリカ分散体を得た。このコロイダルシリカ分散体を、通常の圧力で加熱蒸留することによって4600ミリリットルに濃縮した。3000ミリリットルの容量のDI水を分散体に加えて、蒸留の間にメタノールに置き換えた(容積を維持した)。最終的な分散体はおよそ20.1wt%のコロイダルシリカ濃縮物を有した。
Claims (33)
- 水系液体キャリアと、
前記水系液体キャリア中に分散したコロイダルシリカ研磨剤粒子と、
前記コロイダルシリカ研磨剤粒子中に、外表面に対して内側に組み込まれたアミノシラン化合物又はホスホニウムシラン化合物と、
鉄含有促進剤と
を含み、1.5〜7の範囲のpHである、化学機械研磨組成物。 - 水系液体キャリアと、
前記水系液体キャリア中に分散したコロイダルシリカ研磨剤粒子と、
前記コロイダルシリカ研磨剤粒子中に、外表面に対して内側に組み込まれた、窒素含有化合物又はリン含有化合物である化学種(ただし、前記化学種はテトラエチルアンモニウムを含まない)と、
鉄含有促進剤と
を含み、2〜4.5の範囲のpHであり、
前記化学種がアミノシランではない、化学機械研磨組成物。 - 前記コロイダルシリカ研磨剤粒子が10mV以上の永久正電荷を有する、請求項1又は2に記載の組成物。
- 前記コロイダルシリカ研磨剤粒子が15mV以上の永久正電荷を有する、請求項1又は2に記載の組成物。
- 前記コロイダルシリカ研磨剤粒子が、30〜70nmの範囲の平均粒子サイズを有する、請求項1〜4のいずれか1項に記載の組成物。
- 前記コロイダルシリカ研磨剤粒子が、40〜60nmの範囲の平均粒子サイズを有する、請求項1〜5のいずれか1項に記載の組成物。
- 0.2〜2wt%の前記コロイダルシリカ研磨剤粒子を含む、請求項1〜6のいずれか1項に記載の組成物。
- 1〜4wt%の前記コロイダルシリカ研磨剤粒子を含む、請求項1〜6のいずれか1項に記載の組成物。
- 30%以上の前記コロイダルシリカ研磨剤粒子が3つ以上の凝集した一次粒子を含む、請求項1〜8のいずれか1項に記載の組成物。
- 50%以上の前記コロイダルシリカ研磨剤粒子が3つ以上の凝集した一次粒子を含み、20%以上の前記コロイダルシリカ研磨剤粒子が単量体又は二量体である、請求項1〜8のいずれか1項に記載の組成物。
- 前記アミノシラン化合物が、プロピル基、1級アミン、又は4級アミンを含む、請求項1及び請求項3〜10のいずれか1項に記載の組成物。
- 前記アミノシラン化合物が、ビス(2−ヒドロキシエチル)−3−アミノプロピルトリアルコキシシラン、ジエチルアミノメチルトリアルコキシシラン、(N,N−ジエチル−3−アミノプロピル)トリアルコキシシラン)、3−(N−スチリルメチル−2−アミノエチルアミノプロピルトリアルコキシシラン、アミノプロピルトリアルコキシシラン、(2−N−ベンジルアミノエチル)−3−アミノプロピルトリアルコキシシラン)、トリアルコキシシリルプロピル−N,N,N−トリメチルアンモニウム、N−(トリアルコキシシリルエチル)ベンジル−N,N,N−トリメチルアンモニウム、(ビス(メチルジアルコキシシリルプロピル)−N−メチルアミン、ビス(トリアルコキシシリルプロピル)尿素、ビス(3−(トリアルコキシシリル)プロピル)−エチレンジアミン、ビス(トリアルコキシシリルプロピル)アミン、ビス(トリアルコキシシリルプロピル)アミン、3−アミノプロピルトリアルコキシシラン、N−(2−アミノエチル)−3−アミノプロピルメチルジアルコキシシラン、N−(2−アミノエチル)−3−アミノプロピルトリアルコキシシラン、3−アミノプロピルメチルジアルコキシシラン、3−アミノプロピルトリアルコキシシラン、(N−トリアルコキシシリルプロピル)ポリエチレンイミン、トリアルコキシシリルプロピルジエチレントリアミン、N−フェニル−3−アミノプロピルトリアルコキシシラン、N−(ビニルベンジル)−2−アミノエチル−3−アミノプロピルトリアルコキシシラン、4−アミノブチルトリアルコキシシラン、又はそれらの混合物を含む、請求項1及び請求項3〜11のいずれか1項に記載の組成物。
- 2.0〜4.5の範囲のpHを有する、請求項1及び請求項3〜12のいずれか1項に記載の組成物。
- 前記鉄含有促進剤が可溶性鉄含有触媒を含む、請求項1〜13のいずれか1項に記載の組成物。
- 前記可溶性鉄含有触媒と結合した安定剤であって、リン酸、酢酸、フタル酸、クエン酸、アジピン酸、シュウ酸、マロン酸、アスパラギン酸、コハク酸、グルタル酸、ピメリン酸、スベリン酸、アゼライン酸、セバシン酸、マレイン酸 、グルタコン酸、ムコン酸、エチレンジアミンテトラ酢酸、プロピレンジアミンテトラ酢酸、及びそれらの混合物からなる群より選択される安定剤をさらに含む、請求項14に記載の組成物。
- 過酸化水素酸化剤をさらに含む、請求項1〜15のいずれか1項に記載の組成物。
- 1000μS/cm未満の電気伝導度を有する、請求項1〜16のいずれか1項に記載の組成物。
- 前記液体キャリア中の溶液中にアミン化合物をさらに含む、請求項1〜17のいずれか1項に記載の組成物。
- 前記アミン化合物が12個以上の炭素原子を有するアルキル基を含む、請求項18に記載の組成物。
- 前記アミン化合物がポリ4級アミン化合物である、請求項18に記載の組成物。
- 前記アミン化合物が4個以上のアミン基を有するアミン含有ポリマーである、請求項18に記載の組成物。
- 前記コロイダルシリカ研磨剤粒子が、外部シェルが内部コア上に配置されたコア−シェル構造を有し、前記アミノシラン化合物又は前記化学種が前記外部シェルの中に組み込まれる、請求項1〜21のいずれか1項に記載の組成物。
- 前記コロイダルシリカ研磨剤粒子が1.90g/cm3超の密度を有する、請求項1〜22のいずれか1項に記載の組成物。
- 前記コロイダルシリカ研磨剤粒子中のシリカに対する前記アミノシラン化合物又は前記化学種のモル比が10%未満である、請求項1〜23のいずれか1項に記載の組成物。
- 前記コロイダルシリカ研磨剤粒子が10mV以上の永久正電荷を有し、
前記鉄含有促進剤が可溶性鉄含有触媒を含み、
前記可溶性鉄含有触媒と結合した安定剤をさらに含み、
前記液体キャリア中の溶液中にアミン化合物をさらに含み、
2〜3.5の範囲のpHを有する、請求項1又は2に記載の組成物。 - 0.2〜2wt%の前記コロイダルシリカ研磨剤粒子をさらに含む、請求項25に記載の組成物。
- 前記コロイダルシリカ研磨剤粒子が10mV以上の永久正電荷を有し、
前記鉄含有促進剤が可溶性鉄含有触媒を含み、
前記可溶性鉄含有触媒と結合した安定剤をさらに含み、
前記液体キャリア中の溶液中にアミン化合物をさらに含み、
3〜4.5の範囲のpHと、1000μS/cm未満の電気伝導度とを有する、請求項1又は2に記載の組成物。 - 1〜4wt%の前記コロイダルシリカ研磨剤粒子をさらに含む、請求項27に記載の組成物。
- タングステン層を含む基材を化学機械研磨するための方法であって、
(a)前記基材を、請求項1〜28のいずれか1項に記載の化学機械研磨組成物と接触させる工程、
(b)前記基材に対して前記研磨組成物を動かす工程、及び
(c)前記基材をすり減らして、前記基材から前記タングステン層の一部を除去し、それによって前記基材を研磨する工程、を含む方法。 - 前記基材が、ケイ素酸素材料をさらに含み、
(c)における前記ケイ素酸素材料の除去速度が、(c)におけるタングステンの除去速度以上である、請求項29に記載の方法。 - 前記基材が、ケイ素窒素材料をさらに含み、
(c)における前記ケイ素窒素材料の除去速度が、(c)におけるタングステンの除去速度以上である、請求項30に記載の方法。 - 前記基材が、ケイ素酸素材料をさらに含み、
(c)におけるタングステンの除去速度が、(c)における前記ケイ素酸素材料の除去速度の40倍以上である、請求項29に記載の方法。 - (a)液体溶液を提供する工程、
(b)前記液体溶液と、シリカ生成化合物と、アミノシラン化合物とを組み合わせて、それによって、コロイダルシリカ粒子を、分散体が内部に組み込まれた前記アミノシラン化合物を有するコロイダルシリカ粒子を含んで得られるように成長させる工程、
(c)鉄含有促進剤を前記分散体と混ぜる工程、及び
(d)前記分散体のpHを2〜4.5の範囲の値に調整する工程、
を含む、化学機械研磨組成物を製造するための方法。
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