WO2006112377A1 - 研磨材スラリーおよびこれを用いた研磨材 - Google Patents
研磨材スラリーおよびこれを用いた研磨材 Download PDFInfo
- Publication number
- WO2006112377A1 WO2006112377A1 PCT/JP2006/307907 JP2006307907W WO2006112377A1 WO 2006112377 A1 WO2006112377 A1 WO 2006112377A1 JP 2006307907 W JP2006307907 W JP 2006307907W WO 2006112377 A1 WO2006112377 A1 WO 2006112377A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- abrasive
- water
- resin
- abrasive slurry
- amide group
- Prior art date
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- 239000002002 slurry Substances 0.000 title claims abstract description 115
- 238000005498 polishing Methods 0.000 title abstract description 104
- 239000000463 material Substances 0.000 title description 10
- 229920005989 resin Polymers 0.000 claims abstract description 138
- 239000011347 resin Substances 0.000 claims abstract description 138
- 125000003368 amide group Chemical group 0.000 claims abstract description 119
- 239000000178 monomer Substances 0.000 claims description 95
- 229910052751 metal Inorganic materials 0.000 claims description 72
- 239000002184 metal Substances 0.000 claims description 72
- 239000011146 organic particle Substances 0.000 claims description 64
- 239000002245 particle Substances 0.000 claims description 48
- 229920006026 co-polymeric resin Polymers 0.000 claims description 47
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 42
- 229920002554 vinyl polymer Polymers 0.000 claims description 41
- 150000001875 compounds Chemical class 0.000 claims description 39
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 30
- 125000000524 functional group Chemical group 0.000 claims description 23
- 238000006116 polymerization reaction Methods 0.000 claims description 22
- 229910021645 metal ion Inorganic materials 0.000 claims description 20
- 230000000379 polymerizing effect Effects 0.000 claims description 18
- 230000009477 glass transition Effects 0.000 claims description 17
- 239000007800 oxidant agent Substances 0.000 claims description 17
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims description 10
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 7
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- 239000002344 surface layer Substances 0.000 claims description 6
- 125000004093 cyano group Chemical group *C#N 0.000 claims description 4
- 125000000542 sulfonic acid group Chemical group 0.000 claims description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical group OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 3
- 235000013405 beer Nutrition 0.000 claims description 3
- 238000000034 method Methods 0.000 description 37
- -1 for example Chemical group 0.000 description 33
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 24
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 24
- 239000000203 mixture Substances 0.000 description 24
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 24
- 238000004519 manufacturing process Methods 0.000 description 23
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 21
- 230000003628 erosive effect Effects 0.000 description 20
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 17
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 15
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium peroxydisulfate Substances [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 description 15
- VAZSKTXWXKYQJF-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)OOS([O-])=O VAZSKTXWXKYQJF-UHFFFAOYSA-N 0.000 description 15
- 229910001870 ammonium persulfate Inorganic materials 0.000 description 15
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 15
- 229910052802 copper Inorganic materials 0.000 description 15
- 239000010949 copper Substances 0.000 description 15
- 239000012153 distilled water Substances 0.000 description 15
- 239000000839 emulsion Substances 0.000 description 15
- 238000007720 emulsion polymerization reaction Methods 0.000 description 15
- 239000007787 solid Substances 0.000 description 15
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 14
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 14
- 239000003795 chemical substances by application Substances 0.000 description 14
- 230000000052 comparative effect Effects 0.000 description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 12
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 12
- 239000003082 abrasive agent Substances 0.000 description 12
- 239000004065 semiconductor Substances 0.000 description 12
- 230000015572 biosynthetic process Effects 0.000 description 10
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 9
- 239000000654 additive Substances 0.000 description 9
- 238000005530 etching Methods 0.000 description 9
- 239000010410 layer Substances 0.000 description 9
- 238000003756 stirring Methods 0.000 description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 8
- 239000002253 acid Substances 0.000 description 8
- 229920001577 copolymer Polymers 0.000 description 8
- 239000003999 initiator Substances 0.000 description 8
- 239000000126 substance Substances 0.000 description 8
- 239000000758 substrate Substances 0.000 description 8
- NQPDZGIKBAWPEJ-UHFFFAOYSA-N valeric acid Chemical compound CCCCC(O)=O NQPDZGIKBAWPEJ-UHFFFAOYSA-N 0.000 description 8
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 7
- 229910021529 ammonia Inorganic materials 0.000 description 7
- 239000007864 aqueous solution Substances 0.000 description 7
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 description 7
- 239000012964 benzotriazole Substances 0.000 description 7
- 238000004364 calculation method Methods 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 7
- 235000006408 oxalic acid Nutrition 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 239000004094 surface-active agent Substances 0.000 description 7
- 229920003169 water-soluble polymer Polymers 0.000 description 7
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 6
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 6
- QUSNBJAOOMFDIB-UHFFFAOYSA-N Ethylamine Chemical compound CCN QUSNBJAOOMFDIB-UHFFFAOYSA-N 0.000 description 6
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 244000309464 bull Species 0.000 description 6
- 230000008859 change Effects 0.000 description 6
- 238000001816 cooling Methods 0.000 description 6
- 229910001873 dinitrogen Inorganic materials 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- 239000003505 polymerization initiator Substances 0.000 description 6
- 238000010992 reflux Methods 0.000 description 6
- 150000003839 salts Chemical class 0.000 description 6
- 229910052710 silicon Inorganic materials 0.000 description 6
- 239000010703 silicon Substances 0.000 description 6
- 150000001412 amines Chemical class 0.000 description 5
- 239000002518 antifoaming agent Substances 0.000 description 5
- 238000011156 evaluation Methods 0.000 description 5
- 125000003055 glycidyl group Chemical group C(C1CO1)* 0.000 description 5
- 229920001519 homopolymer Polymers 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
- 238000007747 plating Methods 0.000 description 5
- 238000003860 storage Methods 0.000 description 5
- 230000002194 synthesizing effect Effects 0.000 description 5
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 4
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 4
- ROSDSFDQCJNGOL-UHFFFAOYSA-N Dimethylamine Chemical compound CNC ROSDSFDQCJNGOL-UHFFFAOYSA-N 0.000 description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical group OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 4
- DHMQDGOQFOQNFH-UHFFFAOYSA-N Glycine Chemical compound NCC(O)=O DHMQDGOQFOQNFH-UHFFFAOYSA-N 0.000 description 4
- BAVYZALUXZFZLV-UHFFFAOYSA-N Methylamine Chemical compound NC BAVYZALUXZFZLV-UHFFFAOYSA-N 0.000 description 4
- 229920003171 Poly (ethylene oxide) Chemical class 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 4
- 235000001014 amino acid Nutrition 0.000 description 4
- OPQARKPSCNTWTJ-UHFFFAOYSA-L copper(ii) acetate Chemical compound [Cu+2].CC([O-])=O.CC([O-])=O OPQARKPSCNTWTJ-UHFFFAOYSA-L 0.000 description 4
- 230000007547 defect Effects 0.000 description 4
- 238000002296 dynamic light scattering Methods 0.000 description 4
- 238000010828 elution Methods 0.000 description 4
- FQPSGWSUVKBHSU-UHFFFAOYSA-N methacrylamide Chemical compound CC(=C)C(N)=O FQPSGWSUVKBHSU-UHFFFAOYSA-N 0.000 description 4
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- 239000003002 pH adjusting agent Substances 0.000 description 4
- LOAUVZALPPNFOQ-UHFFFAOYSA-N quinaldic acid Chemical compound C1=CC=CC2=NC(C(=O)O)=CC=C21 LOAUVZALPPNFOQ-UHFFFAOYSA-N 0.000 description 4
- 230000002829 reductive effect Effects 0.000 description 4
- KDYFGRWQOYBRFD-UHFFFAOYSA-N succinic acid Chemical compound OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 description 4
- 238000003786 synthesis reaction Methods 0.000 description 4
- 229940005605 valeric acid Drugs 0.000 description 4
- BJEPYKJPYRNKOW-REOHCLBHSA-N (S)-malic acid Chemical compound OC(=O)[C@@H](O)CC(O)=O BJEPYKJPYRNKOW-REOHCLBHSA-N 0.000 description 3
- 125000000954 2-hydroxyethyl group Chemical group [H]C([*])([H])C([H])([H])O[H] 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- 239000002202 Polyethylene glycol Substances 0.000 description 3
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 3
- 229920002125 Sokalan® Polymers 0.000 description 3
- 239000006061 abrasive grain Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 230000000996 additive effect Effects 0.000 description 3
- 230000032683 aging Effects 0.000 description 3
- BJEPYKJPYRNKOW-UHFFFAOYSA-N alpha-hydroxysuccinic acid Natural products OC(=O)C(O)CC(O)=O BJEPYKJPYRNKOW-UHFFFAOYSA-N 0.000 description 3
- 150000001413 amino acids Chemical class 0.000 description 3
- BTBJBAZGXNKLQC-UHFFFAOYSA-N ammonium lauryl sulfate Chemical compound [NH4+].CCCCCCCCCCCCOS([O-])(=O)=O BTBJBAZGXNKLQC-UHFFFAOYSA-N 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 3
- 150000001735 carboxylic acids Chemical class 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- WNAHIZMDSQCWRP-UHFFFAOYSA-N dodecane-1-thiol Chemical compound CCCCCCCCCCCCS WNAHIZMDSQCWRP-UHFFFAOYSA-N 0.000 description 3
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 3
- 125000003827 glycol group Chemical group 0.000 description 3
- 230000002209 hydrophobic effect Effects 0.000 description 3
- RAXXELZNTBOGNW-UHFFFAOYSA-N imidazole Natural products C1=CNC=N1 RAXXELZNTBOGNW-UHFFFAOYSA-N 0.000 description 3
- 239000010954 inorganic particle Substances 0.000 description 3
- 239000001630 malic acid Substances 0.000 description 3
- 235000011090 malic acid Nutrition 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- 230000003472 neutralizing effect Effects 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 239000004584 polyacrylic acid Substances 0.000 description 3
- 229920001223 polyethylene glycol Polymers 0.000 description 3
- 239000001294 propane Substances 0.000 description 3
- 239000011342 resin composition Substances 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- 230000001629 suppression Effects 0.000 description 3
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 3
- 229910052721 tungsten Inorganic materials 0.000 description 3
- 239000010937 tungsten Substances 0.000 description 3
- 229910021642 ultra pure water Inorganic materials 0.000 description 3
- 239000012498 ultrapure water Substances 0.000 description 3
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 description 2
- KGRVJHAUYBGFFP-UHFFFAOYSA-N 2,2'-Methylenebis(4-methyl-6-tert-butylphenol) Chemical compound CC(C)(C)C1=CC(C)=CC(CC=2C(=C(C=C(C)C=2)C(C)(C)C)O)=C1O KGRVJHAUYBGFFP-UHFFFAOYSA-N 0.000 description 2
- JAHNSTQSQJOJLO-UHFFFAOYSA-N 2-(3-fluorophenyl)-1h-imidazole Chemical compound FC1=CC=CC(C=2NC=CN=2)=C1 JAHNSTQSQJOJLO-UHFFFAOYSA-N 0.000 description 2
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 description 2
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 2
- 239000004342 Benzoyl peroxide Substances 0.000 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 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 description 2
- VZCYOOQTPOCHFL-OWOJBTEDSA-N Fumaric acid Chemical compound OC(=O)\C=C\C(O)=O VZCYOOQTPOCHFL-OWOJBTEDSA-N 0.000 description 2
- 239000004471 Glycine Substances 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- WOBHKFSMXKNTIM-UHFFFAOYSA-N Hydroxyethyl methacrylate Chemical compound CC(=C)C(=O)OCCO WOBHKFSMXKNTIM-UHFFFAOYSA-N 0.000 description 2
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- 239000005642 Oleic acid Substances 0.000 description 2
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 description 2
- 239000004373 Pullulan Substances 0.000 description 2
- 229920001218 Pullulan Polymers 0.000 description 2
- 235000021355 Stearic acid Nutrition 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- ULUAUXLGCMPNKK-UHFFFAOYSA-N Sulfobutanedioic acid Chemical compound OC(=O)CC(C(O)=O)S(O)(=O)=O ULUAUXLGCMPNKK-UHFFFAOYSA-N 0.000 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 description 2
- 239000006096 absorbing agent Substances 0.000 description 2
- YRKCREAYFQTBPV-UHFFFAOYSA-N acetylacetone Chemical compound CC(=O)CC(C)=O YRKCREAYFQTBPV-UHFFFAOYSA-N 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 2
- 150000007513 acids Chemical class 0.000 description 2
- 125000000217 alkyl group Chemical group 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 125000003277 amino group Chemical group 0.000 description 2
- 239000003963 antioxidant agent Substances 0.000 description 2
- 239000002216 antistatic agent Substances 0.000 description 2
- 235000019400 benzoyl peroxide Nutrition 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 239000003093 cationic surfactant Substances 0.000 description 2
- 239000003086 colorant Substances 0.000 description 2
- 239000002270 dispersing agent Substances 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 239000004088 foaming agent Substances 0.000 description 2
- 238000010528 free radical solution polymerization reaction Methods 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 125000004029 hydroxymethyl group Chemical group [H]OC([H])([H])* 0.000 description 2
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 description 2
- 239000004611 light stabiliser Substances 0.000 description 2
- LVHBHZANLOWSRM-UHFFFAOYSA-N methylenebutanedioic acid Natural products OC(=O)CC(=C)C(O)=O LVHBHZANLOWSRM-UHFFFAOYSA-N 0.000 description 2
- 239000006082 mold release agent Substances 0.000 description 2
- PJUIMOJAAPLTRJ-UHFFFAOYSA-N monothioglycerol Chemical compound OCC(O)CS PJUIMOJAAPLTRJ-UHFFFAOYSA-N 0.000 description 2
- 238000000569 multi-angle light scattering Methods 0.000 description 2
- QYZFTMMPKCOTAN-UHFFFAOYSA-N n-[2-(2-hydroxyethylamino)ethyl]-2-[[1-[2-(2-hydroxyethylamino)ethylamino]-2-methyl-1-oxopropan-2-yl]diazenyl]-2-methylpropanamide Chemical compound OCCNCCNC(=O)C(C)(C)N=NC(C)(C)C(=O)NCCNCCO QYZFTMMPKCOTAN-UHFFFAOYSA-N 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 239000002736 nonionic surfactant Substances 0.000 description 2
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 2
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 2
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 230000036961 partial effect Effects 0.000 description 2
- JRKICGRDRMAZLK-UHFFFAOYSA-L persulfate group Chemical group S(=O)(=O)([O-])OOS(=O)(=O)[O-] JRKICGRDRMAZLK-UHFFFAOYSA-L 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
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- 150000003254 radicals Chemical class 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- MNCGMVDMOKPCSQ-UHFFFAOYSA-M sodium;2-phenylethenesulfonate Chemical compound [Na+].[O-]S(=O)(=O)C=CC1=CC=CC=C1 MNCGMVDMOKPCSQ-UHFFFAOYSA-M 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 239000008117 stearic acid Substances 0.000 description 2
- 239000001384 succinic acid Substances 0.000 description 2
- 239000006228 supernatant Substances 0.000 description 2
- 239000011975 tartaric acid Substances 0.000 description 2
- 235000002906 tartaric acid Nutrition 0.000 description 2
- WGTYBPLFGIVFAS-UHFFFAOYSA-M tetramethylammonium hydroxide Chemical compound [OH-].C[N+](C)(C)C WGTYBPLFGIVFAS-UHFFFAOYSA-M 0.000 description 2
- 239000002562 thickening agent Substances 0.000 description 2
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- GETQZCLCWQTVFV-UHFFFAOYSA-N trimethylamine Chemical compound CN(C)C GETQZCLCWQTVFV-UHFFFAOYSA-N 0.000 description 2
- 239000000080 wetting agent Substances 0.000 description 2
- 229920002818 (Hydroxyethyl)methacrylate Polymers 0.000 description 1
- NMUWSGQKPAEPBA-UHFFFAOYSA-N 1,2-dibutylbenzene Chemical group CCCCC1=CC=CC=C1CCCC NMUWSGQKPAEPBA-UHFFFAOYSA-N 0.000 description 1
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- 238000012674 dispersion polymerization Methods 0.000 description 1
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- 229960000878 docusate sodium Drugs 0.000 description 1
- MOTZDAYCYVMXPC-UHFFFAOYSA-N dodecyl hydrogen sulfate Chemical compound CCCCCCCCCCCCOS(O)(=O)=O MOTZDAYCYVMXPC-UHFFFAOYSA-N 0.000 description 1
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- SYELZBGXAIXKHU-UHFFFAOYSA-N dodecyldimethylamine N-oxide Chemical compound CCCCCCCCCCCC[N+](C)(C)[O-] SYELZBGXAIXKHU-UHFFFAOYSA-N 0.000 description 1
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- WTNTZFRNCHEDOS-UHFFFAOYSA-N n-(2-hydroxyethyl)-2-methylpropanamide Chemical compound CC(C)C(=O)NCCO WTNTZFRNCHEDOS-UHFFFAOYSA-N 0.000 description 1
- DVEKCXOJTLDBFE-UHFFFAOYSA-N n-dodecyl-n,n-dimethylglycinate Chemical compound CCCCCCCCCCCC[N+](C)(C)CC([O-])=O DVEKCXOJTLDBFE-UHFFFAOYSA-N 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 229910017464 nitrogen compound Inorganic materials 0.000 description 1
- 150000002830 nitrogen compounds Chemical class 0.000 description 1
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- 238000002161 passivation Methods 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 235000011007 phosphoric acid Nutrition 0.000 description 1
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- 238000012545 processing Methods 0.000 description 1
- QLNJFJADRCOGBJ-UHFFFAOYSA-N propionamide Chemical compound CCC(N)=O QLNJFJADRCOGBJ-UHFFFAOYSA-N 0.000 description 1
- 229940080818 propionamide Drugs 0.000 description 1
- 230000009993 protective function Effects 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- GJAWHXHKYYXBSV-UHFFFAOYSA-N quinolinic acid Chemical compound OC(=O)C1=CC=CN=C1C(O)=O GJAWHXHKYYXBSV-UHFFFAOYSA-N 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000007261 regionalization Effects 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Chemical compound [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- APSBXTVYXVQYAB-UHFFFAOYSA-M sodium docusate Chemical class [Na+].CCCCC(CC)COC(=O)CC(S([O-])(=O)=O)C(=O)OCC(CC)CCCC APSBXTVYXVQYAB-UHFFFAOYSA-M 0.000 description 1
- SZHIIIPPJJXYRY-UHFFFAOYSA-M sodium;2-methylprop-2-ene-1-sulfonate Chemical compound [Na+].CC(=C)CS([O-])(=O)=O SZHIIIPPJJXYRY-UHFFFAOYSA-M 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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- 229940073455 tetraethylammonium hydroxide Drugs 0.000 description 1
- LRGJRHZIDJQFCL-UHFFFAOYSA-M tetraethylazanium;hydroxide Chemical compound [OH-].CC[N+](CC)(CC)CC LRGJRHZIDJQFCL-UHFFFAOYSA-M 0.000 description 1
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Classifications
-
- 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
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B37/00—Lapping machines or devices; Accessories
-
- 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
- C09K3/1409—Abrasive particles per se
-
- 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
-
- 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
- H01L21/302—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to change their surface-physical characteristics or shape, e.g. etching, polishing, cutting
- H01L21/304—Mechanical treatment, e.g. grinding, polishing, cutting
-
- 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]
Definitions
- the present invention relates to an abrasive slurry and an abrasive using the same, and in particular, an abrasive for polishing an insulating film surface or a metal wiring such as tungsten, aluminum, or copper in a wiring forming process for manufacturing a semiconductor device. It relates to slurry.
- CMP Chemical and Mechanical Polishing
- the CMP process is an indispensable process for the processing of insulating film materials such as silicon oxide and silicon, which are made only with metal materials such as copper wiring, tantalum barrier metal, and tungsten plugs. In order to reduce this, it is required that a high polishing rate can be obtained with a small amount of slurry supply, and that damage to the substrate is difficult to occur. Scratch, dating and erosion are examples of substrate damage in CMP.
- scratches are polishing flaws on the metal surface, and are caused by the hardness of the barrel and the partial overpolishing caused by the presence of the agglomerates of the barrel.
- date erosion causes an increase or variation in wiring resistance, and further causes a short circuit between wirings formed in an upper layer, which significantly reduces the reliability of the wiring body device and significantly reduces the yield. Become.
- erosion is a phenomenon in which the wiring pattern is formed in a concave shape by being further polished including the insulating film as the underlying layer at the center of the dense portion.
- Erosion is the basis for overpolishing with hard barrels and barrier layers that prevent the diffusion of insulating films and metals. This is caused by low polishing selectivity with the layer.
- dating is likely to occur due to the elution (etching) of the metal by the slurry in the acidic region, which is the corrosion region of the metal, or by the complex forming agent or the pH adjusting agent contained in the slurry.
- dating is likely to occur in slurries where the chemical action of the additive is stronger than the mechanical action of the cannonball.
- the 1Z2 wiring width (half pitch) on the insulating film has been further reduced from 90 nm to 65 nm, and further to 45 nm.
- the surface of the insulating film to be polished Has a more complex structure. As the wiring width becomes finer, polishing scratches on the metal surface due to scratches cause disconnection, and erosion causes an increase and variation in wiring resistance, as well as short-circuiting between wirings formed in the upper layer. This significantly reduces the reliability of the device and greatly reduces the yield.
- the barrel is made of silica that is softer than alumina, and the neutral force that does not elute the metal is formed by forming a metal passive film on the alkaline side.
- a polishing liquid is being developed. For example, when silica is granulated, scratches are reduced compared to alumina.
- the metal is mechanically polished, so that the agglomerates of the granule and the metal shavings generate scratches and erosion, and the generation of defects cannot be fundamentally suppressed.
- Patent Documents 1 and 2 optimization of the polishing pad groove pattern is studied in order to efficiently use the supplied slurry.
- Patent Document 3 discloses a method in which particles of an organic polymer compound are used as abrasive barrels.
- the organic polymer used here is methacrylic resin, polystyrene resin, or the like.
- Patent Document 5 discloses an abrasive slurry containing a chelating resin and inorganic abrasive grains.
- Patent Documents 6 and 7 describe CMP polishing liquids containing polyacrylic acid for the purpose of suppressing etching and reducing dying.
- Patent Documents 8 and 9 describe a polishing agent for CMP containing a protective film forming agent and a water-soluble polymer.
- Patent Document 10 discloses an abrasive slurry that forms a fragile insoluble metal complex with a complex-forming agent such as quinolinecarboxylic acid, and achieves both suppression of etching and high polishing rate. .
- Patent Document 1 Japanese Patent Laid-Open No. 11 216663
- Patent Document 2 Japanese Patent Laid-Open No. 11-333699
- Patent Document 3 JP-A-7-86216
- Patent Document 4 Japanese Patent Laid-Open No. 2001-55559
- Patent Document 5 Japanese Unexamined Patent Application Publication No. 2002-261052
- Patent Document 6 JP-A-11-195628
- Patent Document 7 Special Publication 2004-532521
- Patent Document 8 International Publication No. WO00Z13217 Pamphlet
- Patent Document 9 International Publication No. WO01Z17006 Pamphlet
- Patent Document 10 Japanese Unexamined Patent Publication No. 2000-183003
- An abrasive slurry that includes:
- an abrasive comprising the abrasive slurry, an oxidant, a water-soluble compound capable of forming a complex with a metal, and an anticorrosive.
- polishing material characterized by containing the said abrasive slurry, the compound which can form a complex with a metal, and water is provided.
- the abrasive slurry comprises a water-soluble resin (A) containing amide groups and organic particles.
- the application field of the abrasive slurry of the present invention is not particularly limited, and can be used for polishing various substrates such as glass substrates.
- the abrasive slurry of the present invention comprises:
- water-soluble resin means a resin that forms a form dissolved in a medium mainly composed of water
- organic particles mean a medium mainly composed of water. It means rosin that forms a particulate form.
- the organic particles (B) are included, damage to the surface to be polished can be effectively suppressed. wear. This effect is remarkably exhibited when the abrasive does not contain inorganic particles. For example, by using an abrasive slurry containing softer organic particles (B) than copper for the formation of a copper wiring structure, erosion when overpolishing is suppressed compared to the case of using inorganic particles. . In addition, since it is harder than copper and does not contain particles, scratches can be prevented.
- the water-soluble rosin (A) containing amide groups and the organic particles (B) may be present in any form.
- one of the resins is synthesized in the presence of either a water-soluble resin (A) or organic particles (B) containing an amide group.
- the resin composition obtained in this way is more preferable.
- the organic particles (B) may be particles obtained by polymerizing one or more vinyl monomers by emulsion polymerization or the like.
- the case where the organic particles (B) are polymerized by emulsion polymerization will be described as an example.
- the organic particles (B) obtained by emulsion polymerization of the water-soluble rosin (A) containing an amide group and one or more vinyl monomers are present in any form.
- the resin (A) containing an amide group or the resin (B) obtained by emulsion polymerization of one or more vinyl monomers may be used. More preferred is a composition obtained by synthesizing one resin in the presence of the other resin.
- a water-soluble resin containing an amide group (A) 1S is a resin obtained by emulsion polymerization in the presence of organic particles (B) obtained by polymerizing one or more types of butyl monomers.
- the organic particles (B) are mixed with one or more kinds of vinyl in the presence of a water-soluble resin (A) containing an amide group. Dispersion stability can be further improved by obtaining the monomer by emulsion polymerization.
- the water-soluble resin (A) containing an amide group of the present invention is a resin obtained by superposing a compound containing at least an amide group.
- methacrylamide is particularly preferred.
- the water-soluble resin (A) containing an amide group of the present invention may polymerize one or more types of bulle monomers in addition to a compound containing an amide group.
- the one or more types of bull monomers are preferably vinyl monomers having a functional group, for example, amide group-containing bull monomers such as acrylamide;
- Carboxyl group-containing butyl monomers such as (meth) acrylic acid
- Hydroxyl-containing butyl monomers such as 2-hydroxyethyl (meth) atarylate;
- Glycidyl group-containing vinyl monomers such as glycidyl (meth) atalylate
- Cyan group-containing butyl monomers such as (meth) acrylonitrile
- Amino group-containing butyl monomers such as N, N-dimethylaminoethyl (meth) atalylate; acetocetoxy group-containing butyl monomers such as acetotaxetyl (meth) acrylate; and
- Sulfonic acid-containing monomers such as sodium styrenesulfonate and sodium methallylsulfonate
- hydrophobic vinyl monomers such as styrene and (meth) acrylic acid esters.
- a crosslinkable vinyl monomer may be used for the water-soluble resin (A) containing an amide group.
- the monomer include methylene bis (meth) acrylamide, dibutenebenzene, polyethylene. Examples thereof include glycol chain-containing di (meth) acrylate.
- the crosslinkable vinyl monomer may contain two or more bur groups.
- chain transfer agents such as n-dodecyl mercaptan and 1 thioglycerol and other molecular weight modifiers are used to adjust the molecular weight of water-soluble rosin (A) containing amide groups. You can do it.
- the weight average molecular weight Mw of the water-soluble resin (A) containing an amide group is, for example, 5,000 or more, and preferably 10,000 or more.
- the molecular weight of the water-soluble resin (A) containing an amide group is preferable because the weight average molecular weight Mw is, for example, 500,000 or less from the viewpoint of preventing the viscosity of the abrasive slurry from excessively increasing.
- the water-soluble resin (A) containing an amide group is measured, for example, by the GPC-MALLS method using the product name: PULLULAN (manufactured by Shodex) as a standard.
- the water-soluble resin (A) containing an amide group has a monomer containing an amide group in an amount of 100 to 10% by weight, more preferably 100 to 50% by weight. Preferred is rosin polymerized by weight%, more preferably 0-50% by weight.
- the abrasive slurry of the present invention may contain a water-soluble resin other than the water-soluble resin (A) containing an amide group.
- the content of the abrasive slurry may be a water-soluble resin containing an amide group. 100 to 200 parts by weight is preferable with respect to 100 parts by weight of the fat (A).
- the method for synthesizing the water-soluble rosin (A) containing an amide group is not particularly limited, but polymerization carried out in a solvent containing water as a main component is preferable.
- a particularly preferred polymerization form is aqueous solution polymerization.
- the polymerization initiator used in the synthesis of the water-soluble resin (A) containing an amide group but persulfates such as ammonium persulfate, which are preferred by the water-soluble radical initiator, Water-soluble azo initiators such as 4'-azobis (4-cyananovalerate) are particularly preferred.
- Water-soluble resin containing amide group (A)
- the polymerization temperature at the time of synthesis is not limited, but the production time and the conversion rate of the monomer to the copolymer (reaction rate) are taken into consideration It is preferable to synthesize in the range of 30 to 95 ° C, and 50 to 85 ° C is particularly preferable.
- EDTA which is a metal ion sealing agent, or a salt thereof.
- the organic particle (B) is preferably an (co) polymerization emulsion obtained by emulsion polymerization of one or more types of bulle monomers.
- Bull monomers include hydrophobic butyl monomers such as styrene and alkyl (meth) acrylate;
- Cyan group-containing butyl monomers such as (meth) acrylonitrile
- Amide group-containing butyl monomer such as (meth) acrylamide
- Carboxyl group-containing butyl monomers such as (meth) acrylic acid
- Hydroxyl-containing butyl monomers such as 2-hydroxyethyl (meth) atarylate;
- Glycidyl group-containing vinyl monomers such as glycidyl (meth) atalylate
- a cross-linkable vinyl monomer may be used.
- the monomer include methylene bis (meth) acrylamide, dibutenebenzene, polyethylene glycol chain-containing di (meth) acrylate, and the like. Can be illustrated. Further, as the crosslinkable vinyl monomer, one containing two or more vinyl groups may be used.
- chain transfer agents such as n-dodecyl mercaptan and 1-thioglycerol, and other various molecular weight adjusting agents may be used.
- the organic particles (B) obtained by emulsion polymerization of one or more types of bulle monomers are one or more types of bulls in the presence of a water-soluble resin (A) containing an amide group.
- a (co) polymer emulsion obtained by emulsion polymerization of monomers is preferred.
- the water-soluble resin (A) containing an amide group is preferably a resin obtained by polymerizing a monomer containing at least methacrylamide.
- the method for synthesizing the organic particles (B) is not particularly limited, but emulsion polymerization performed in a solvent containing water as a main component is preferable.
- a surfactant or a water-soluble polymer can be appropriately used.
- the surfactant an ionic surfactant, a cationic surfactant, a non-ionic surfactant, examples thereof include diionic surfactants.
- the surfactant does not contain a metal.
- metal-free surfactants include dodecylbenzene sulfonic acid, lauryl sulfuric acid, alkyl diphenyl ether disulfonic acid, alkylnaphthalene sulfonic acid, dialkyl sulfosuccinic acid, stearic acid, oleic acid, Examples include salts of dioctylsulfosuccinate, polyoxyethylene alkyl ether sulfate, polyoxyethylene alkyl ether ether sulfate, dialkyl sulfosuccinic acid, stearic acid, oleic acid, tert-octylphenoxyethoxy polyethoxyethyl sulfate, and the like. Ammonium salt can be used.
- non-ionic surfactant that does not contain a metal in general, it has an ethylene glycol chain as a hydrophilic group and does not contain a metal.
- polyoxyethylene lauryl ether, polyoxyethylene octyl phenol ether, polyoxyethylene olefin vinyl ether, polyoxyethylene nourphenol ester, oxyethylene oxypropylene block copolymer, tert-octyl phenoxy examples thereof include chilled polyethoxyethanol, nonylphenoloxyl polyethoxyethanol, and the like.
- the cationic surfactant not containing a metal for example, lauryltrimethylammo-muchloride, stearyltrimethylammo-muchloride, cetyltrimethylammo-muchloride, distearyldimethylammo-chloride, alkylbenzyldimethylammo- Umchloride, lauryl betaine, stearyl betaine, lauryl dimethylamine oxide, lauryl carboxymethylhydroxyethylimidazolium betaine, coconutamine acetate, stearylamine acetate, alkylamidine azine polyoxyethanol, alkylpico Examples thereof include rhium chloride. One or more of these dispersants can be selected.
- the water-soluble polymer used for the purpose of improving polymerization stability and storage stability is a water-soluble resin containing the above-mentioned amide group ( A) may or may not be included.
- water-soluble resin is used in the manufacturing process of a semiconductor device! Is preferred.
- water-soluble polymers that do not contain metals include polybulal alcohol, modified polybulal alcohol, polybulurpyrrolidone, (meth) acrylic acid (co) polymer, poly (meth) acrylamide (co) polymer, And water-soluble polymers such as ethylene glycol.
- the polymerization initiator used in the synthesis of the organic particles (B) persulfates such as ammonium persulfate and 4,4, -azobis, which are preferred by water-soluble radical initiators, are preferred. Water-soluble azo initiators such as (4-cianovaleric acid) are particularly preferred. Particularly preferred in the semiconductor device manufacturing process, the polymerization initiator does not contain a metal.
- Examples of the metal-free polymerization initiator include hydrogen peroxide, ammonium persulfate, azobisciano valeric acid, 2,2, -azobis (2-amidinopropane) dihydrochloride, 2,2, monoazobis [ 2- (N-phenolamidino) propane] dihydrochloride, 2, 2, -azobis ⁇ 2— [N- (4-phenyl) amidino] propane ⁇ dihydrochloride, 2, 2, -azobis ⁇ 2 — [N— (4-Hydroxyphenyl) amidino] propane ⁇ dihydrochloride, 2, 2, -azobis [2- (N-benzylamidino) propane] dihydrochloride, 2, 2'-azobis [2- (N -Arylamidino) propane] dihydrochloride, 2, 2, -azobis ⁇ 2- [N- (2-hydroxyethyl) amidino] propane ⁇ dihydrochloride, azobisisobutyoxy-tolyl, 2, 2, monoazobis
- the initiator is more preferably water-soluble ammonium persulfate, azobisciano valeric acid or 2,2, -azobis (2-amidinopropane) dihydrochloride.
- a typical initiator is used in an amount of 0.1 to 5% by weight based on the total weight of the (co) polymerized monomers.
- the polymerization temperature during the synthesis of the organic particles (B) is not limited, but the production time and monomer co-polymerization are not limited. Taking into account the conversion rate (reaction rate) to coalescence, it is preferable to synthesize in the range of 30 to 95 ° C, particularly preferably 50 to 85 ° C.
- EDTA a pH adjusting agent
- EDTA a metal ion sealing agent
- a salt thereof for the purpose of improving production stability.
- a general neutralizing agent such as ammonia (water) or sodium hydroxide.
- a neutralizing agent that does not contain a metal salt that can be adjusted to H is more preferable.
- the neutralizing agent include ammonia (water) and various amines.
- the organic resin (B) is a particle made of a copolymerized resin having a glass transition point of 25 ° C or more and used as an abrasive, dishing is performed.
- the water-soluble resin containing an amide group (A) may be a water-soluble copolymer resin containing an amide group.
- the glass transition point means a calculated value.
- the copolymerized resin having a glass transition point of 25 ° C. or higher according to the present invention has a high polishing rate and suppresses a change in composition on the pad during polishing. It is preferably 5 ° C or higher, more preferably 40 ° C or higher and 200 ° C or lower.
- the copolymerized resin having a glass transition point of 25 ° C or higher may have a functional group capable of capturing metal ions. By doing so, the polishing quality can be improved.
- the organic resin (B) has a functional group capable of capturing metal ions
- the water-soluble resin (A) having an amide group is a vinyl monomer having an amide group. It is a water-soluble copolymerized resin and it is preferable that these coexist.
- Water-soluble copolymer resin of vinyl monomer having amide group in outer shell part (surface layer part) of copolymer resin having functional group capable of trapping metal ions and glass transition point of 25 ° C or more By adopting a configuration in which there is, it is possible to more effectively obtain a high polishing rate and a high level difference elimination property.
- the functional group capable of capturing a metal ion is, for example, at least one kind selected from a group power consisting of a carboxyl group, an amide group, a sulfonic acid group, a phosphoric acid group, a cyano group, a carboxylic group, and a hydroxyl group. be able to.
- examples of functional groups capable of capturing metal ions include functional groups capable of forming anions such as carboxyl groups, sulfonic acid groups, and phosphoric acids, hydroxyl groups, and silane groups. Neutral functional groups having high electronegativity such as an ano group, a carbo group, and a aceto acetyl group are preferred.
- the copolymerized resin having a glass transition point of 25 ° C or higher according to the present invention can be produced by known aqueous solution polymerization, emulsion polymerization, dispersion polymerization or the like, but is not limited thereto.
- the glass transition point (Tg) of a copolymer resin obtained by polymerizing a plurality of monomers can be obtained by calculation using the Fox equation.
- the Fox equation is to calculate the Tg of the copolymer based on the Tg of the homopolymer of each monomer for each monomer forming the copolymer. The details are described in Bulletin of the American Physical Society, Series 2, Vol. 1, No. 3, p. 123 (1956). .
- Tg is an example of Shinkobunko Bunko, No.7, Introduction to Synthetic Resins for Paints (by Kitaoka) Polymer publications) Values described on pages 168-169 can be employed.
- Tg of monomer homopolymers can be calculated by using computational science software “Cheops ver. 4” (Million Zillion Software Inc.).
- the composition of the monomer constituting the particles made of the copolymer resin is, for example, 1 to 80 parts by weight of a monomer having a functional group capable of capturing metal ions based on the mass of all monomers.
- the content of the monomer having a functional group capable of capturing metal ions is more preferably 5 to 60 parts by weight.
- Examples of the monomer having a functional group capable of capturing a metal ion used in the present invention include unsaturated monobasic acids such as acrylic acid, unsaturated dibasic acids such as itaconic acid, and monoesters thereof.
- unsaturated monobasic acids such as acrylic acid, unsaturated dibasic acids such as itaconic acid, and monoesters thereof.
- Sulfonic acid-containing monomers such as sodium styrene sulfonate; Cyano group-containing monomers such as acrylonitrile;
- Ketone group-containing monomers such as acetoacetoxyl acetylate
- acrylic acid methacrylic acid, crotonic acid, itaconic acid, fumaric acid, maleic acid, allylic sulfonic acid, methallyl sulfonic acid, 2-methacryloyl xetyl acid phosphate, acetoacetoxy Shetyl (meth) acrylate and acetoacetoxybutyl (meth) acrylate are preferred.
- the vinyl monomer having a Tg of 25 ° C or more used in the present invention includes styrene, methyl methacrylate, isobutyl acrylate, isoborn methacrylate, and cyclohexane.
- Hydrophobic vinyl monomers such as alkyl (meth) acrylates such as xyl metatalylate, ethyl metatalylate, butyl metatalylate;
- Glycidyl group-containing butyl monomer such as glycidyl methacrylate
- Etc examples include acrylonitrile, acrylamide, methacrylamide, acrylic acid, methacrylic acid, benzyl methacrylate, and butyl acetate.
- a crosslinkable beer monomer may be used as necessary.
- Acrylamide, dibutylbenzene, polyethylene glycol chain-containing di (meth) acrylate, etc. may be exemplified.
- the crosslinkable vinyl monomer may contain two or more bur groups.
- the abrasive slurry of the present invention contains the above-described copolymerized resin having a glass transition point of 25 ° C. or higher as the organic resin (B), and an amide group as the water-soluble resin (A) containing an amide group.
- the water-soluble copolymer resin containing an amide group is, for example, a copolymer resin obtained by polymerizing a beer monomer containing an amide group.
- Water-soluble copolymerized resin means the light transmittance of an aqueous solution containing 10 parts by weight of the copolymerized resin (wavelength 400 nm, UV / VIS / NIR ⁇ spectrometer JASCO V-570 used) ) Is a copolymerized resin having a high water solubility of 85% or more.
- the compound containing an amide group metatalamide is particularly preferable.
- the water-soluble copolymer containing an amide group is 50 to 99 parts by weight of a vinyl monomer containing an amide group based on the mass of all monomers. It is a copolymerized resin obtained by polymerizing 1 to 50 parts by weight of a vinyl monomer, and may be water-soluble. In this way, a higher polishing rate can be maintained and dishing can be reduced.
- the content of the copolymer resin having an amide group allows the chemical reaction of the metal and the water-soluble copolymer resin having an amide group to proceed more reliably to achieve the target polishing rate more reliably. From the viewpoint, it is preferably 1% by weight or more in the abrasive slurry, and more preferably 3% by weight or more.
- the content of the copolymer resin having an amide group is particularly preferably 20% by weight or less from the viewpoint of suppressing a decrease in fluidity due to an increase in the viscosity of the slurry and achieving a sufficient polishing rate. 10% by weight or less.
- the water-soluble resin containing amide groups (A) is an amide group-containing water-soluble copolymer resin and the organic particles (B) are copolymerized resin particles
- the outer shell portion of the copolymerized resin particles By taking a composite form in which a part of the amide group-containing water-soluble copolymer resin is chemically or physically adsorbed on the surface layer part, the pressure dependency of the polishing rate can be improved.
- the composite particle formed by the amide group-containing water-soluble copolymer resin and the copolymerized resin particles has a particle diameter (dl) measured by a dynamic light scattering method, and the water-soluble resin is observed.
- a layer (layer thickness dl—d2) that is larger than the particle size (d2) measured by a transmission electron microscope and has a high affinity for the copolymerized resin particles around the copolymerized resin particles. This is a particle of a resin that can be analyzed indirectly.
- the outer shell part and the Z or surface layer part of the particle made of a copolymer resin having a functional group capable of capturing metal ions are obtained by polymerizing a vinyl monomer containing an amide group.
- Copolymer resin may be coated.
- the outer shell is the portion of the outer shell inside the particle (co
- the surface layer portion refers to a region near the surface of the particle.
- the bull monomer containing an amide group may be (meth) acrylamide.
- the composite resin particles formed by the copolymerized resin particles with the amide group-containing water-soluble copolymer resin for example, polymerize particles made of the copolymer resin in the presence of the amide group-containing water-soluble copolymer resin.
- it can be obtained by polymerizing an amide group-containing water-soluble copolymerized resin in the presence of the resin particles, or by mixing both after polymerization.
- mercaptans such as t-dodecyl mercaptan and n-dodecyl mercaptan and alcohols such as isopropanol can be used as molecular weight regulators. It is.
- the copolymerized resin does not contain a metal component, and it is a copolymer that does not contain a metal, which is preferable in terms of improving the reliability of metal wiring that is an object to be polished.
- a resin it can be produced by using a monomer that does not contain a metal, a polymerization initiator, a dispersant such as a water-soluble polymer or a surfactant as necessary, and other additives. it can.
- Examples of the polymerization initiator not containing a metal include organic peroxides such as hydrogen peroxide, ammonium persulfate, cumene hydride peroxide, t-butyl hydride peroxide, benzoyl peroxide, azobisciano valeric acid, Examples thereof include 2,2′-azobis (2-aminodipane bread) dibasic acid salts and the like, and one or more of these can be selected and used.
- the initiator is preferably water-soluble ammonium persulfate, azobisciano valeric acid, or 2,2, -azobis (2-aminodipropane) dibasic acid salt.
- the amount of a general initiator used is 0.1 to 5% by mass based on the total mass of (co) polymerized monomers.
- the composition change during polishing is suppressed.
- an abrasive slurry capable of sufficiently reducing the etching and forming a more reliable embedded pattern is provided.
- a high polishing rate can be exhibited, and the generation of scratching and erosion can be remarkably suppressed.
- the water-soluble resin (A) containing an amide group is 10% by weight or more and 90% by weight or less, and the organic particles (B) are 90% by weight or more with respect to all the resin components. It may be contained up to 10% by weight.
- the water-soluble resin (A) containing an amide group is contained in an amount of 10% by weight to 90% by weight with respect to all the resin components.
- the solid content of the water-soluble resin (A) containing an amide group with respect to the total solid content of the resin is preferably 10% by weight or more from the viewpoint of increasing the polishing rate, and more preferably 30%. % By weight or more.
- the solid content of the water-soluble rosin (A) containing an amide group with respect to the total solid content of the resin is preferably 90% by weight or less from the viewpoint of more effectively suppressing erosion. More preferably, it is 70% by weight or less.
- the solid content of the organic particles (B) with respect to the total solid content of the resin is preferably 10% by weight or more from the viewpoint of improving the polishing rate, and is 30% by weight or more. Is more preferable.
- the solid content of the organic particles (B) with respect to the total solid content of the resin is preferably 90% by weight and more preferably 70% by weight or less from the viewpoint of stabilizing the polishing rate. Better ,.
- additives may be added to the abrasive slurry of the present invention! / ⁇ .
- the additive can be used before, during and after polymerization.
- additives include pH adjusters, chelating agents, pigments, wetting agents, antistatic agents, antioxidants, preservatives, ultraviolet absorbers, light stabilizers, fluorescent brighteners, colorants, penetrants. , Foaming agents, mold release agents, antifoaming agents, antifoaming agents, fluidity improvers, thickeners and the like, but are not limited thereto.
- the abrasive of the present invention contains the above-described abrasive slurry as an essential component.
- various compounds can be added to the abrasive of the present invention.
- Such compounds include water-soluble complex-forming compounds, various oxidizing agents, benzotriazole, quinaldic acid and other nitrogen compounds.
- Element-containing heterocyclic compounds, and water-soluble polymers such as polyacrylic acid, polybutyl alcohol, polyethylene glycol, and glucose, and surfactants. These may be added alone or in combination of two or more. Also good.
- the amount and kind of addition are not particularly limited as long as the object of the present invention can be achieved.
- the abrasive of the present invention contains the above-described abrasive slurry, an oxidizing agent, a compound capable of forming a complex with a metal, and an anticorrosive.
- the abrasive of the present invention may contain the above-described abrasive slurry, a compound capable of forming a complex with a metal, and water. In this way, the polishing rate can be controlled more stably.
- the metal in the compound that can form a complex with a metal is specifically a metal to be polished.
- the compound that can form a complex with a metal can specifically form a complex with the metal. It is a water-soluble compound.
- the abrasive of the present invention may further contain an oxidizing agent.
- the abrasive of the present invention contains a water-soluble compound capable of forming a complex with a metal, and these are at least one selected from carboxylic acids, amines, amino acids and ammonia power, and an oxidizing agent. These may be hydrogen peroxide. By doing so, a high polishing rate and low dishing can be more reliably achieved.
- the content of the total resin component in the entire abrasive is, for example, 1 wt% or more and 15 wt% or less. By doing so, the polishing rate can be further improved.
- a compound capable of forming a complex with a metal is preferably a water-soluble compound.
- Amines such as methylamine, dimethylamine, triethylamine, ethylamine, jetylamine, triethylamine;
- Amino acids such as glycine, aspartic acid, glutamic acid and cysteine;
- Ketones such as acetylacetone; N (nitrogen) -containing cyclic compounds such as imidazole;
- Ammonia etc. are mentioned.
- oxalic acid, malic acid, and ethylamine are used.
- the abrasive slurry of the present invention contains a copolymerized resin having a glass transition point of 25 ° C or higher as the organic resin (B), and also contains a water-soluble resin (A) containing an amide group.
- a copolymerized resin having a glass transition point of 25 ° C or higher as the organic resin (B)
- A water-soluble resin
- carboxylic acids, amines, amino acids, and ammonia are preferable, and oxalic acid, malonic acid, tartaric acid, and glycine are more preferable. .
- Compound strength capable of forming a complex with the metal to be polished The content of 0.5 to 5% by weight in the slurry is preferable from the viewpoint of suppressing etching.
- the content of the compound capable of forming a complex with the metal to be polished (complex-forming compound) with respect to the entire abrasive is preferably 0 from the viewpoint of sufficiently exerting the effect and achieving the target polishing rate more reliably. 1% by weight or more, more preferably 0.5% by weight or more.
- the content of the complex-forming compound in the polishing material suppresses excessive progress of complex formation with the metal to be polished, and further effectively suppresses the dating of the metal to be polished out of the polishing target. Therefore, the content is preferably 10% by weight or less, more preferably 5% by weight or less.
- a small amount of a nitrogen-containing heterocyclic compound such as benzotriazole or quinaldic acid can be added to the abrasive.
- the content in the abrasive is preferably 0.1% by weight or more, more preferably 0.2% by weight or more, from the viewpoint of sufficiently exerting the effect and ensuring the desired protective effect. To do.
- the content of the nitrogen-containing heterocyclic compound in the abrasive is preferably 1% by weight or less, and further Preferably it is 0.5 wt% or less.
- the oxidizing agent hydrogen peroxide, ammonium persulfate, or the like, which can be used, preferably hydrogen peroxide is used.
- the content of oxidant in the slurry is the chemical reaction between metal and resin. From the viewpoint of reliably achieving the desired polishing rate by proceeding, it is preferably 0.1% by weight or more, and more preferably 0.5% by weight or more. Further, from the viewpoint of suppressing the inhibition of the progress of polishing due to passivation of the oxide film formed on the metal surface, the content of the oxidizing agent is preferably 15% by weight or less, more preferably 5% by weight or less.
- a pH in the range of 7 or more and 11 or less is a preferable embodiment in terms of polishing quality. Further, a pH of 7 or more and 9 or less is a preferable embodiment from the viewpoint of reducing erosion.
- the pH of the abrasive of the present invention is preferably 5 or more, more preferably 7 or more, from the viewpoint of more reliably suppressing metal elution and more effectively suppressing dating.
- the pH of the polishing material indicates that the insulating film is dissolved or partially decomposed at the point where the semiconductor insulating film and the metal wiring, which are the final point of metal film polishing, exist on the same surface. In terms of effective suppression, it is preferably 11 or less, more preferably 9 or less
- the abrasive slurry of the present invention contains the above-mentioned copolymerized resin having a glass transition point of 25 ° C or higher as the organic resin (B), and a water-soluble resin (A
- the pH of the abrasive is preferably 7 or more.
- the pH of the abrasive is preferably 11 or less, more preferably 9 or less.
- an abrasive slurry The pH is preferably 8 or more and 10 or less.
- the substance used for adjusting the pH of the abrasive is not particularly limited, but alkaline substances not containing metal include ammonia, triethylamine, jetylamine, ethylamine, trimethylamine, dimethylamine, and methylamine. , Amines such as triethanolamine, diethanolamine, monoethanolamine;
- Inorganics such as NaOH and KOH;
- alkyl ammonium salts such as tetramethyl ammonium hydroxide and tetraethyl ammonium hydroxide.
- the acidic substance examples include inorganic acids such as hydrochloric acid and nitric acid, and organic acids such as acetic acid, oxalic acid and citrate.
- PH adjusting agents are water-soluble compounds capable of forming a complex with the above-described metal, which may also serve as the water-soluble compound that can be a ligand of the metal described above. May be. These substances may be used in combination of two or more.
- Examples of the method for producing the abrasive slurry of the present invention include, for example, a method in which water-soluble resin (A) containing amide groups (A) and organic particles (B) are separately synthesized and mixed, and a water-soluble resin containing amide groups (A ) In the presence of organic particles (B), and a method of synthesizing the water-soluble resin (A) in the presence of organic particles (B).
- a method in which the organic particles (B) are emulsion polymerized in the presence of the water-soluble resin (A) containing an amide group is preferable.
- Abrasive materials can be produced by gradually adding abrasive slurry, water, complex-forming compounds, pH adjusters and the like. Although there is no particular limitation on this production method, it is preferable to add an aqueous solution of the complex-forming compound adjusted to pH to the pH-adjusted abrasive slurry and mix well with stirring. Then, gradually add an oxidizing agent and mix with stirring.
- abrasive is specifically a CMP abrasive.
- the water-soluble resin (A) containing an amide group is an amide group-containing water-soluble copolymer resin and the organic resin (B) is a copolymerized resin particle, it captures metal ions. Gradually add water-soluble copolymerized resin particles having functional groups and amide groups, water, complex-forming compounds, pH adjusters, etc. In addition, an abrasive can be produced.
- the additive can be used before, during or after polymerization of the copolymer resin.
- additives include anticorrosives, wetting agents, antistatic agents, antioxidants, preservatives, ultraviolet absorbers, light stabilizers, fluorescent brighteners, colorants, penetrants, foaming agents, Examples include mold release agents, antifoaming agents, antifoaming agents, antifoaming agents, fluidity improvers, thickeners, etc. For semiconductor processes, those that do not contain metals are appropriately selected. can do.
- nitrogen-containing bicyclic compounds such as benzotriazole, quinaldic acid, and quinolinic acid, and aromatic amino acids such as ferrolanine may be used alone or in combination of two or more kinds.
- halogenated substances containing chlorine, fluorine, and iodine may be added alone or in combination of two or more as a polishing accelerator.
- the abrasive slurry of the present invention it is possible to suppress damage to the base while ensuring a good polishing rate.
- the insulating film surface or tungsten It can be polished and flattened without damaging metal wiring such as aluminum and copper.
- the present invention also includes the following embodiments.
- Abrasive slurry (Emulsion for abrasives) characterized in that it contains a rosin (B) obtained by emulsion polymerization of an amide group-containing rosin (A) and one or more types of bulle monomers. ).
- Resin (B) is a resin obtained by emulsion polymerization of one or more vinyl monomers in the presence of an amide-containing resin (A) ( 1 The abrasive slurry according to 1).
- a resin containing an amide group (A) is a resin obtained by emulsion polymerization of one or more vinyl monomers and obtained by polymerization in the presence of resin (B).
- Abrasive material (abrasive material slurry) comprising the abrasive material slurry according to any one of (1 1) to (15), a compound capable of forming a complex with the metal to be polished and water .
- (1-7) The abrasive according to (16), wherein the total amount of the resin component is 1 wt% or more and 15 wt% or less in the abrasive.
- the compound capable of forming a complex with the metal to be polished is contained in an abrasive material in an amount of 0.5 wt% or more and 5 wt% or less (1-6) or (1— The abrasive according to 7). (1-9) The abrasive according to any one of (16) to (18), wherein the abrasive has a pH of 7 or more and 9 or less.
- the functional group capable of capturing the metal ion according to (2-2) is a carboxyl group or an amide group
- Particles made of a copolymer resin (B) is made of a copolymer resin having a functional group capable of trapping metal ions, and the water-soluble copolymer resin (A) is a vinyl monomer containing an amide group.
- the abrasive slurry according to (2-4) which is coated with the water-soluble copolymerized resin (A).
- parts and% are all parts by weight and% by weight unless otherwise specified.
- the molecular weight of the water-soluble rosin (A) containing amide groups obtained in the following examples was all in the range of 5000 to 500000.
- Abrasive Includes abrasive slurry in examples and comparative examples
- Object to be polished Thermal oxide film on a silicon wafer substrate, Ta film formed by Z sputtering method, 300 ⁇ , seed copper film for plating formed by ZCVD method, 1500 ⁇ , copper film formed by Z plating method, 15000 ⁇ Stacked 8-inch silicon wafer
- polishing device MIRRA3400 manufactured by Applied materials
- Polishing pad NITTA HASS IC1400 XY Group
- the object to be polished is cleaned with ultra pure water and ultrasonic, then dried, and a 4-terminal probe is used.
- the film thickness before and after polishing was measured by V, sheet resistance measurement.
- the average polishing rate was calculated from the change in film thickness and the polishing time.
- the surface was observed at X2,500 times. In addition, scratches on the surface with a length of 0.1 m or more
- the erosion amount was measured by the following method. After polishing under the above polishing conditions, the cross-sectional SEM (scanning electron microscope) photograph of the pattern formation wafer (SEMATECH # 854) with a wiring width of 100 ⁇ m and a wiring width of 10 ⁇ m shows the shapes of the Ta film and SiO film. Force erosion
- the abrasive slurry was allowed to stand for 6 hours at atmospheric pressure and room temperature. Thereafter, the state of the abrasive slurry was visually observed.
- a separable flask equipped with a stirrer and reflux cooling was charged with 200 parts by weight of distilled water, replaced with nitrogen gas, and then heated to 80 ° C.
- a mixture of vinyl monomer and water having the following composition was continuously added over 2 hours with stirring, and then at the same temperature for 2 hours. Aging was completed to complete the polymerization.
- the solid content is 20. 0%
- An aqueous solution of water-soluble rosin (A-1) containing a mid group was obtained.
- the molecular weight of the obtained water-soluble resin (A-1) containing an amide group was measured by a GPC-MALLS method using a product name: PULLULAN (manufactured by Shodex) as a standard.
- the amount Mw was 39720.
- a separable flask equipped with a stirrer and reflux cooling was charged with 360 parts by weight of distilled water, replaced with nitrogen gas, and then heated to 80 ° C. Next, 2.0 parts of ammonium persulfate was added, and then a bulle monomer emulsion having the following composition was continuously added over 3 hours and held for 3 hours to complete the polymerization. I let you.
- a copolymerized resin having a solid content of 20.0%, that is, organic particles (B-1) was obtained.
- the obtained organic particles (B-1) had a particle size of 154 nm.
- the particle size of the organic particles (B) was determined by a dynamic light scattering method, and the number average particle size was taken as the particle size.
- the aqueous solution of oxalic acid was adjusted to pH 8.3 using ammonia. This solution was mixed well with the abrasive slurry (1) of Example 1 adjusted to pH 8.3 with ammonia, pure water, 30% hydrogen peroxide, and benzotriazole, and 5. Ewt. Abrasives of hydrogen oxide 2.0 wt%, oxalic acid 1. Owt%, benzotriazole 0.018 wt%, and pH 8.3 were prepared.
- the particle diameter of the particles in the abrasive of this example was measured by a dynamic light scattering method and transmission electron microscope (TEM) observation.
- the particle diameter dl measured by the dynamic light scattering method was 154 nm
- the particle diameter d2 determined by TEM observation was lOnm.
- Example 3 The same operation as in Example 3 was performed, except that the abrasive slurry (1) in Example 1 was replaced with the abrasive slurry (2) in Example 2. Table 1 shows the polishing results.
- Example 1 The abrasive slurry (1) of Example 1 was placed on a commercially available colloidal silica (PL-1 manufactured by Fuso Kai Sangaku Co., Ltd.). The same operation and evaluation as in Example 3 were performed except that the conditions were changed. The results are shown in Table 1.
- Example 3 The same operation and evaluation as in Example 3 were performed except that the abrasive slurry (1) in Example 1 was replaced with commercially available alumina (AEROXIDE AluC manufactured by Nippon Aerosil Co., Ltd.). The results are shown in Table 1.
- AEROXIDE AluC manufactured by Nippon Aerosil Co., Ltd.
- This example relates to an abrasive slurry obtained by polymerizing a water-soluble resin (A) containing an amide group in the presence of organic particles (B).
- a separable flask equipped with a stirrer and reflux cooling was charged with 360 parts by weight of distilled water, replaced with nitrogen gas, and then heated to 80 ° C.
- 2.0 parts of azobiscianovaleric acid was added, and a vinyl monomer emulsion having the following composition was continuously added over 3 hours, and was further maintained for 3 hours to complete the polymerization.
- a copolymerized resin having a solid content of 20.0%, that is, organic particles (B-2) was obtained.
- the particle diameter of the obtained organic particles (B-2) was 19 lnm.
- Example 1 the content of the water-soluble rosin (A) containing an amide group and the organic particles (B) in Example 1 was changed.
- Example 3 This example is an example in which the compound capable of forming a complex in Example 3 was changed.
- the same operation as in Example 3 was performed except that the oxalic acid in Example 3 was replaced with malic acid and the abrasive slurry (1) in Example 3 was replaced with the abrasive slurry (2) in Example 2.
- the results are shown in Table 1.
- Example 7 the oxidizing agent of Example 7 was changed.
- Example 7 The same operation as in Example 7 was performed, except that the oxidizing agent of Example 7 was replaced with peroxyhydrogen power ammonium persulfate. The results are shown in Table 1.
- the abrasive slurry contains only water-soluble rosin (A) containing an amide group and no organic particles (B).
- the abrasive slurry contains only the organic particles (B) and does not contain the water-soluble resin (A) containing amide groups.
- the abrasive slurry was evaluated by the following method.
- Abrasive Includes abrasive slurry in examples and comparative examples
- Object to be polished Thermal oxidation film on silicon wafer substrate Ta film formed by 5000 angstrom Z sputtering method Copper plating film formed by 300 angstrom / CMP method Seed copper film for plating 1500 angstrom Z plating method 8 inch silicon wafer with 15000 angstroms laminated, silicon wafer with wiring pattern (SEMATECH # 85 4)
- Polishing pad NITTA HASS IC-1000 / suba400 Polishing load: 3. Opsi
- the object to be polished was washed with ultrapure water and ultrasonically, then dried, and the film thickness before and after polishing was measured by sheet resistance measurement using a 4-terminal probe.
- the average polishing rate was calculated from the change in film thickness and the polishing time.
- the polishing time was increased by 50% of the time required to complete the copper polishing of the portion where no groove was formed, and overpolishing was performed.
- a metal copper plate (20 X 20 X lmm) is immersed in 70 cc of polishing material supplemented with hydrogen peroxide 2.0%, benzotriazole 0.04%, and copper acetate (11) 0.08%. Hold the polishing liquid for 10 minutes while stirring. The etching rate was calculated from the change in weight before and after the immersion.
- an amide group-containing copolymer resin (A-2) was produced as a water-soluble resin (A) containing an amide group by the following method.
- a separable flask equipped with a stirrer and reflux cooling was charged with 200 parts by weight of distilled water, replaced with nitrogen gas, and then heated to 75 ° C.
- 2.0 parts of ammonium persulfate was added, and then a mixture of 99 parts by weight of acrylamide, 1 part by weight of methacrylic acid and 200 parts by weight of distilled water was continuously added over 2 hours with stirring. Thereafter, aging was carried out at the same temperature for 2 hours to complete the polymerization, and an amide group-containing copolymer resin (A-2) was obtained.
- Example 9 A separable flask equipped with a stirrer and reflux cooling was charged with 260 parts by weight of distilled water and 100 parts by weight of the amide group-containing copolymerized resin (A-2) synthesized in Production Example 2, and then replaced with nitrogen gas. The temperature was raised to 80 ° C. Next, after adding 2.0 parts of ammonium persulfate, the flask was continuously added over 4 hours while stirring the emulsion of vinyl monomer and distilled water having the composition shown in Table 2.
- the obtained organic particles (B-3) had a particle size of 188 nm.
- Example 11 110
- Example 12 159 nm
- a separable flask equipped with a stirrer and reflux cooling was charged with 360 parts by weight of distilled water, replaced with nitrogen gas, and then heated to 80 ° C. Next, after adding 2.0 parts of ammonium persulfate, stirring the emulsion of vinyl monomer and distilled water having the composition (weight ratio) shown in Table 4 over 4 hours. Continuously added to the flask and held for another 4 hours to complete the polymerization.
- the particle diameter of the organic particles (B) obtained in the examples is as follows.
- the weight ratio of the obtained copolymer resin, that is, the organic resin (B) and the amide group-containing copolymer resin (A-2) synthesized in Example 9 was 1: 1. Mix with a stirrer.
- An abrasive was prepared by the following method.
- a compound capable of forming a complex is neutralized with ammonia and added dropwise to a slurry containing a total of 10 parts by weight (in terms of solids) of copolymerized resins A and B prepared in Examples 9-18. Then, hydrogen peroxide (2%) and anticorrosive benzotriazole (0.04%) were added immediately before polishing.
- Tables 5 to 7 show the components, composition and pH of the abrasive in each Example and Comparative Example.
- Table 8 shows the evaluation results of these abrasives.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- General Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- Mechanical Treatment Of Semiconductor (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
Claims
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JP2007526848A JPWO2006112377A1 (ja) | 2005-04-14 | 2006-04-14 | 研磨材スラリーおよびこれを用いた研磨材 |
US11/918,226 US8460414B2 (en) | 2005-04-14 | 2006-04-14 | Polishing slurry and polishing material using same |
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JP (1) | JPWO2006112377A1 (ja) |
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JP2011501406A (ja) * | 2007-10-10 | 2011-01-06 | チェイル インダストリーズ インコーポレイテッド | 金属cmpスラリー組成物及びこれを用いる研磨方法 |
JP2012216723A (ja) * | 2011-04-01 | 2012-11-08 | Nitta Haas Inc | 研磨用組成物 |
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JP2007220891A (ja) * | 2006-02-16 | 2007-08-30 | Toshiba Corp | ポストcmp処理液、およびこれを用いた半導体装置の製造方法 |
JP5327050B2 (ja) * | 2007-07-30 | 2013-10-30 | 日立化成株式会社 | 金属用研磨液及び研磨方法 |
JP5202258B2 (ja) * | 2008-03-25 | 2013-06-05 | 富士フイルム株式会社 | 金属研磨用組成物、及び化学的機械的研磨方法 |
KR101793288B1 (ko) | 2009-05-06 | 2017-11-02 | 바스프 에스이 | 측쇄 작용기를 함유하는 중합체 연마재를 포함한 수성 금속 연마제 및 cmp 공정에서 이의 용도 |
KR102267443B1 (ko) | 2019-07-12 | 2021-06-23 | 주식회사 엠케어코리아 | 개선된 안전성을 갖는 급식 튜브 |
KR102267450B1 (ko) | 2019-07-12 | 2021-06-23 | 주식회사 엠케어코리아 | 조향 장치를 갖는 급식 튜브 |
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Also Published As
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TWI332982B (en) | 2010-11-11 |
JPWO2006112377A1 (ja) | 2008-12-11 |
KR100959439B1 (ko) | 2010-05-25 |
TW200641104A (en) | 2006-12-01 |
US8460414B2 (en) | 2013-06-11 |
US20090064597A1 (en) | 2009-03-12 |
KR20080004598A (ko) | 2008-01-09 |
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