WO2008013226A1 - Composition de polissage - Google Patents
Composition de polissage Download PDFInfo
- Publication number
- WO2008013226A1 WO2008013226A1 PCT/JP2007/064671 JP2007064671W WO2008013226A1 WO 2008013226 A1 WO2008013226 A1 WO 2008013226A1 JP 2007064671 W JP2007064671 W JP 2007064671W WO 2008013226 A1 WO2008013226 A1 WO 2008013226A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- polishing
- polishing composition
- composition according
- acid
- mass
- Prior art date
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- 238000005498 polishing Methods 0.000 title claims abstract description 295
- 239000000203 mixture Substances 0.000 title claims abstract description 182
- 229910052751 metal Inorganic materials 0.000 claims abstract description 74
- 239000002184 metal Substances 0.000 claims abstract description 74
- -1 pyridinecarbonyl compounds Chemical class 0.000 claims abstract description 61
- 125000004432 carbon atom Chemical group C* 0.000 claims abstract description 43
- 150000001875 compounds Chemical class 0.000 claims abstract description 43
- 125000000217 alkyl group Chemical group 0.000 claims abstract description 35
- 229920003169 water-soluble polymer Polymers 0.000 claims abstract description 28
- 239000002253 acid Substances 0.000 claims abstract description 24
- 235000014113 dietary fatty acids Nutrition 0.000 claims abstract description 13
- 229930195729 fatty acid Natural products 0.000 claims abstract description 13
- 239000000194 fatty acid Substances 0.000 claims abstract description 13
- 150000004665 fatty acids Chemical class 0.000 claims abstract description 13
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 claims abstract description 12
- 239000007800 oxidant agent Substances 0.000 claims abstract description 12
- HNJBEVLQSNELDL-UHFFFAOYSA-N pyrrolidin-2-one Chemical compound O=C1CCCN1 HNJBEVLQSNELDL-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229930024421 Adenine Natural products 0.000 claims abstract description 7
- GFFGJBXGBJISGV-UHFFFAOYSA-N Adenine Chemical compound NC1=NC=NC2=C1N=CN2 GFFGJBXGBJISGV-UHFFFAOYSA-N 0.000 claims abstract description 7
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229960000643 adenine Drugs 0.000 claims abstract description 7
- 150000001735 carboxylic acids Chemical class 0.000 claims abstract description 7
- GOERTRUXQHDLHC-UHFFFAOYSA-N gramine Natural products COC1=CC=C2NC=C(CN(C)C)C2=C1 GOERTRUXQHDLHC-UHFFFAOYSA-N 0.000 claims abstract description 7
- 150000007522 mineralic acids Chemical class 0.000 claims abstract description 7
- CYSGHNMQYZDMIA-UHFFFAOYSA-N 1,3-Dimethyl-2-imidazolidinon Chemical compound CN1CCN(C)C1=O CYSGHNMQYZDMIA-UHFFFAOYSA-N 0.000 claims abstract description 6
- 150000001413 amino acids Chemical class 0.000 claims abstract description 6
- GFIWSSUBVYLTRF-UHFFFAOYSA-N 2-[2-(2-hydroxyethylamino)ethylamino]ethanol Chemical compound OCCNCCNCCO GFIWSSUBVYLTRF-UHFFFAOYSA-N 0.000 claims abstract 2
- ICYOLCFDSJJLAC-UHFFFAOYSA-N gramine Chemical compound C1=CC=C[C]2C(CN(C)C)=CN=C21 ICYOLCFDSJJLAC-UHFFFAOYSA-N 0.000 claims abstract 2
- 238000000034 method Methods 0.000 claims description 54
- 229910052757 nitrogen Inorganic materials 0.000 claims description 39
- 239000000758 substrate Substances 0.000 claims description 39
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 33
- 239000010949 copper Substances 0.000 claims description 33
- 229910052802 copper Inorganic materials 0.000 claims description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 25
- SIOXPEMLGUPBBT-UHFFFAOYSA-N picolinic acid Chemical compound OC(=O)C1=CC=CC=N1 SIOXPEMLGUPBBT-UHFFFAOYSA-N 0.000 claims description 24
- 230000004888 barrier function Effects 0.000 claims description 21
- KAESVJOAVNADME-UHFFFAOYSA-N Pyrrole Chemical group C=1C=CNC=1 KAESVJOAVNADME-UHFFFAOYSA-N 0.000 claims description 20
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 claims description 20
- 239000012964 benzotriazole Substances 0.000 claims description 18
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 16
- 229910019142 PO4 Inorganic materials 0.000 claims description 15
- 239000010452 phosphate Substances 0.000 claims description 15
- 229920001577 copolymer Polymers 0.000 claims description 14
- 229920000642 polymer Polymers 0.000 claims description 13
- HYZJCKYKOHLVJF-UHFFFAOYSA-N 1H-benzimidazole Chemical compound C1=CC=C2NC=NC2=C1 HYZJCKYKOHLVJF-UHFFFAOYSA-N 0.000 claims description 12
- 229910052715 tantalum Inorganic materials 0.000 claims description 11
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical group [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 claims description 11
- 229940081066 picolinic acid Drugs 0.000 claims description 10
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 9
- 238000003860 storage Methods 0.000 claims description 9
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 claims description 7
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 claims description 7
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 claims description 7
- 239000005642 Oleic acid Substances 0.000 claims description 7
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 claims description 7
- 239000003513 alkali Substances 0.000 claims description 7
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 7
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 claims description 7
- JMTMSDXUXJISAY-UHFFFAOYSA-N 2H-benzotriazol-4-ol Chemical compound OC1=CC=CC2=C1N=NN2 JMTMSDXUXJISAY-UHFFFAOYSA-N 0.000 claims description 6
- 239000008119 colloidal silica Substances 0.000 claims description 6
- QNILTEGFHQSKFF-UHFFFAOYSA-N n-propan-2-ylprop-2-enamide Chemical compound CC(C)NC(=O)C=C QNILTEGFHQSKFF-UHFFFAOYSA-N 0.000 claims description 5
- 229910045601 alloy Inorganic materials 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 4
- NPZTUJOABDZTLV-UHFFFAOYSA-N hydroxybenzotriazole Substances O=C1C=CC=C2NNN=C12 NPZTUJOABDZTLV-UHFFFAOYSA-N 0.000 claims description 4
- JRKICGRDRMAZLK-UHFFFAOYSA-L persulfate group Chemical group S(=O)(=O)([O-])OOS(=O)(=O)[O-] JRKICGRDRMAZLK-UHFFFAOYSA-L 0.000 claims description 4
- IBBMAWULFFBRKK-UHFFFAOYSA-N picolinamide Chemical compound NC(=O)C1=CC=CC=N1 IBBMAWULFFBRKK-UHFFFAOYSA-N 0.000 claims description 4
- 150000003536 tetrazoles Chemical class 0.000 claims description 4
- 235000006408 oxalic acid Nutrition 0.000 claims description 3
- LOAUVZALPPNFOQ-UHFFFAOYSA-N quinaldic acid Chemical compound C1=CC=CC2=NC(C(=O)O)=CC=C21 LOAUVZALPPNFOQ-UHFFFAOYSA-N 0.000 claims description 3
- KFJDQPJLANOOOB-UHFFFAOYSA-N 2h-benzotriazole-4-carboxylic acid Chemical compound OC(=O)C1=CC=CC2=NNN=C12 KFJDQPJLANOOOB-UHFFFAOYSA-N 0.000 claims description 2
- 229910001362 Ta alloys Inorganic materials 0.000 claims description 2
- 150000004996 alkyl benzenes Chemical class 0.000 claims description 2
- 150000001732 carboxylic acid derivatives Chemical class 0.000 claims description 2
- 125000000542 sulfonic acid group Chemical group 0.000 claims description 2
- 238000005260 corrosion Methods 0.000 abstract description 51
- 230000007797 corrosion Effects 0.000 abstract description 49
- MFIGJRRHGZYPDD-UHFFFAOYSA-N n,n'-di(propan-2-yl)ethane-1,2-diamine Chemical compound CC(C)NCCNC(C)C MFIGJRRHGZYPDD-UHFFFAOYSA-N 0.000 abstract description 4
- 230000009467 reduction Effects 0.000 abstract description 4
- 150000007513 acids Chemical class 0.000 abstract description 3
- NOUUUQMKVOUUNR-UHFFFAOYSA-N n,n'-diphenylethane-1,2-diamine Chemical compound C=1C=CC=CC=1NCCNC1=CC=CC=C1 NOUUUQMKVOUUNR-UHFFFAOYSA-N 0.000 abstract description 3
- JUHORIMYRDESRB-UHFFFAOYSA-N benzathine Chemical compound C=1C=CC=CC=1CNCCNCC1=CC=CC=C1 JUHORIMYRDESRB-UHFFFAOYSA-N 0.000 abstract 1
- KLSJWNVTNUYHDU-UHFFFAOYSA-N Amitrole Chemical group NC1=NC=NN1 KLSJWNVTNUYHDU-UHFFFAOYSA-N 0.000 description 27
- 239000000178 monomer Substances 0.000 description 27
- 239000000243 solution Substances 0.000 description 26
- 230000000052 comparative effect Effects 0.000 description 23
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 22
- 239000011229 interlayer Substances 0.000 description 19
- 235000012431 wafers Nutrition 0.000 description 17
- 238000010992 reflux Methods 0.000 description 16
- 239000010410 layer Substances 0.000 description 15
- 229910000881 Cu alloy Inorganic materials 0.000 description 14
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 12
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 12
- 238000011156 evaluation Methods 0.000 description 11
- 239000004744 fabric Substances 0.000 description 11
- 239000003999 initiator Substances 0.000 description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 10
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 10
- 230000015572 biosynthetic process Effects 0.000 description 10
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 9
- 230000002829 reductive effect Effects 0.000 description 9
- 150000003839 salts Chemical class 0.000 description 9
- 239000002002 slurry Substances 0.000 description 9
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium peroxydisulfate Substances [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 description 8
- 229910001870 ammonium persulfate Inorganic materials 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 8
- 239000007788 liquid Substances 0.000 description 8
- WBIQQQGBSDOWNP-UHFFFAOYSA-N 2-dodecylbenzenesulfonic acid Chemical compound CCCCCCCCCCCCC1=CC=CC=C1S(O)(=O)=O WBIQQQGBSDOWNP-UHFFFAOYSA-N 0.000 description 7
- 125000000129 anionic group Chemical group 0.000 description 7
- 125000002091 cationic group Chemical group 0.000 description 7
- 229940060296 dodecylbenzenesulfonic acid Drugs 0.000 description 7
- 239000002904 solvent Substances 0.000 description 7
- 239000004094 surface-active agent Substances 0.000 description 7
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 6
- 230000003628 erosive effect Effects 0.000 description 6
- 230000005294 ferromagnetic effect Effects 0.000 description 6
- 238000005227 gel permeation chromatography Methods 0.000 description 6
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 6
- 238000002156 mixing Methods 0.000 description 6
- 238000003786 synthesis reaction Methods 0.000 description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 5
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 5
- 239000002202 Polyethylene glycol Substances 0.000 description 5
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 5
- 239000004020 conductor Substances 0.000 description 5
- 238000001816 cooling Methods 0.000 description 5
- 238000005530 etching Methods 0.000 description 5
- OCDGBSUVYYVKQZ-UHFFFAOYSA-N gramine Chemical compound C1=CC=C2C(CN(C)C)=CNC2=C1 OCDGBSUVYYVKQZ-UHFFFAOYSA-N 0.000 description 5
- 230000006872 improvement Effects 0.000 description 5
- 230000002401 inhibitory effect Effects 0.000 description 5
- KQNPFQTWMSNSAP-UHFFFAOYSA-M isobutyrate Chemical compound CC(C)C([O-])=O KQNPFQTWMSNSAP-UHFFFAOYSA-M 0.000 description 5
- 238000002955 isolation Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
- 239000012299 nitrogen atmosphere Substances 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 229920001223 polyethylene glycol Polymers 0.000 description 5
- 238000006116 polymerization reaction Methods 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- 238000003756 stirring Methods 0.000 description 5
- MZLGASXMSKOWSE-UHFFFAOYSA-N tantalum nitride Chemical compound [Ta]#N MZLGASXMSKOWSE-UHFFFAOYSA-N 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- DHMQDGOQFOQNFH-UHFFFAOYSA-N Glycine Chemical compound NCC(O)=O DHMQDGOQFOQNFH-UHFFFAOYSA-N 0.000 description 4
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 4
- PVNIIMVLHYAWGP-UHFFFAOYSA-N Niacin Chemical compound OC(=O)C1=CC=CN=C1 PVNIIMVLHYAWGP-UHFFFAOYSA-N 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- KFSLWBXXFJQRDL-UHFFFAOYSA-N Peracetic acid Chemical compound CC(=O)OO KFSLWBXXFJQRDL-UHFFFAOYSA-N 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 4
- 230000009471 action Effects 0.000 description 4
- 239000000654 additive Substances 0.000 description 4
- 230000000996 additive effect Effects 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 229940024606 amino acid Drugs 0.000 description 4
- 235000001014 amino acid Nutrition 0.000 description 4
- VAZSKTXWXKYQJF-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)OOS([O-])=O VAZSKTXWXKYQJF-UHFFFAOYSA-N 0.000 description 4
- 230000003247 decreasing effect Effects 0.000 description 4
- 230000001771 impaired effect Effects 0.000 description 4
- ZQMHJBXHRFJKOT-UHFFFAOYSA-N methyl 2-[(1-methoxy-2-methyl-1-oxopropan-2-yl)diazenyl]-2-methylpropanoate Chemical compound COC(=O)C(C)(C)N=NC(C)(C)C(=O)OC ZQMHJBXHRFJKOT-UHFFFAOYSA-N 0.000 description 4
- WWZKQHOCKIZLMA-UHFFFAOYSA-N octanoic acid Chemical compound CCCCCCCC(O)=O WWZKQHOCKIZLMA-UHFFFAOYSA-N 0.000 description 4
- WGYKZJWCGVVSQN-UHFFFAOYSA-N propylamine Chemical compound CCCN WGYKZJWCGVVSQN-UHFFFAOYSA-N 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- 239000000377 silicon dioxide Substances 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 3
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 description 3
- KDXKERNSBIXSRK-YFKPBYRVSA-N L-lysine Chemical compound NCCCC[C@H](N)C(O)=O KDXKERNSBIXSRK-YFKPBYRVSA-N 0.000 description 3
- KDXKERNSBIXSRK-UHFFFAOYSA-N Lysine Natural products NCCCCC(N)C(O)=O KDXKERNSBIXSRK-UHFFFAOYSA-N 0.000 description 3
- 239000004472 Lysine Substances 0.000 description 3
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 3
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- 229920002125 Sokalan® Polymers 0.000 description 3
- 239000003082 abrasive agent Substances 0.000 description 3
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- 150000003851 azoles Chemical class 0.000 description 3
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- JNGZXGGOCLZBFB-IVCQMTBJSA-N compound E Chemical compound N([C@@H](C)C(=O)N[C@@H]1C(N(C)C2=CC=CC=C2C(C=2C=CC=CC=2)=N1)=O)C(=O)CC1=CC(F)=CC(F)=C1 JNGZXGGOCLZBFB-IVCQMTBJSA-N 0.000 description 3
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- 125000003438 dodecyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 3
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 description 3
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- WRKCIHRWQZQBOL-UHFFFAOYSA-N octyl dihydrogen phosphate Chemical compound CCCCCCCCOP(O)(O)=O WRKCIHRWQZQBOL-UHFFFAOYSA-N 0.000 description 3
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- 150000003014 phosphoric acid esters Chemical class 0.000 description 3
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical group [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 3
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- DEPDDPLQZYCHOH-UHFFFAOYSA-N 1h-imidazol-2-amine Chemical compound NC1=NC=CN1 DEPDDPLQZYCHOH-UHFFFAOYSA-N 0.000 description 2
- IMQFZQVZKBIPCQ-UHFFFAOYSA-N 2,2-bis(3-sulfanylpropanoyloxymethyl)butyl 3-sulfanylpropanoate Chemical compound SCCC(=O)OCC(CC)(COC(=O)CCS)COC(=O)CCS IMQFZQVZKBIPCQ-UHFFFAOYSA-N 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 2
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 description 2
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- UAZLASMTBCLJKO-UHFFFAOYSA-N 2-decylbenzenesulfonic acid Chemical compound CCCCCCCCCCC1=CC=CC=C1S(O)(=O)=O UAZLASMTBCLJKO-UHFFFAOYSA-N 0.000 description 2
- KDSNLYIMUZNERS-UHFFFAOYSA-N 2-methylpropanamine Chemical compound CC(C)CN KDSNLYIMUZNERS-UHFFFAOYSA-N 0.000 description 2
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- FERIUCNNQQJTOY-UHFFFAOYSA-N Butyric acid Chemical compound CCCC(O)=O FERIUCNNQQJTOY-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229940126062 Compound A Drugs 0.000 description 2
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- 239000004471 Glycine Substances 0.000 description 2
- NLDMNSXOCDLTTB-UHFFFAOYSA-N Heterophylliin A Natural products O1C2COC(=O)C3=CC(O)=C(O)C(O)=C3C3=C(O)C(O)=C(O)C=C3C(=O)OC2C(OC(=O)C=2C=C(O)C(O)=C(O)C=2)C(O)C1OC(=O)C1=CC(O)=C(O)C(O)=C1 NLDMNSXOCDLTTB-UHFFFAOYSA-N 0.000 description 2
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- OUYCCCASQSFEME-UHFFFAOYSA-N tyrosine Natural products OC(=O)C(N)CC1=CC=C(O)C=C1 OUYCCCASQSFEME-UHFFFAOYSA-N 0.000 description 1
- 235000021122 unsaturated fatty acids Nutrition 0.000 description 1
- 150000004670 unsaturated fatty acids Chemical class 0.000 description 1
- 229940005605 valeric acid Drugs 0.000 description 1
- 239000004474 valine Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/14—Anti-slip materials; Abrasives
- C09K3/1454—Abrasive powders, suspensions and pastes for polishing
- C09K3/1463—Aqueous liquid suspensions
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09G—POLISHING COMPOSITIONS; SKI WAXES
- C09G1/00—Polishing compositions
- C09G1/02—Polishing compositions containing abrasives or grinding agents
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F11/00—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
- C23F11/08—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids
- C23F11/10—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids using organic inhibitors
- C23F11/14—Nitrogen-containing compounds
- C23F11/149—Heterocyclic compounds containing nitrogen as hetero atom
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F3/00—Brightening metals by chemical means
- C23F3/04—Heavy metals
- C23F3/06—Heavy metals with acidic solutions
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/31—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to form insulating layers thereon, e.g. for masking or by using photolithographic techniques; After treatment of these layers; Selection of materials for these layers
- H01L21/3205—Deposition of non-insulating-, e.g. conductive- or resistive-, layers on insulating layers; After-treatment of these layers
- H01L21/321—After treatment
- H01L21/32115—Planarisation
- H01L21/3212—Planarisation by chemical mechanical polishing [CMP]
Definitions
- the present invention relates to a polishing composition, and more specifically, polishing composition suitably used for polishing a substrate surface, particularly when polishing a metal film formed on a substrate, and such polishing composition.
- polishing composition suitably used for polishing a substrate surface, particularly when polishing a metal film formed on a substrate, and such polishing composition.
- a damascene method is used to form wiring using copper or a copper alloy.
- a trench (concave portion) to be a wiring portion is formed in advance in the interlayer insulating film, and after a thin barrier film such as tantalum or tantalum nitride is formed on the surface of the interlayer insulating film including the trench, Copper or copper alloy is deposited thereon.
- CMP chemical mechanical polishing
- MRAM magnetic storage memory
- the metal wiring aluminum, an aluminum alloy, or copper
- a conductor layer made of a copper alloy and a ferromagnetic layer made of nickel monoiron (permalloy) or the like are formed so as to surround the conductor layer.
- a barrier film such as tantalum or tantalum nitride is formed thin so as to sandwich the ferromagnetic layer. Since these metal wirings are formed by the damascene method, excess conductor layers, ferromagnetic layers, and barrier films are planarized and removed by the CMP described above.
- the interlayer dielectric film with a low dielectric constant has lower mechanical strength than the conventionally used silicon oxide interlayer dielectric film. For this reason, polishing by CMP must be performed with low frictional force. Also, since the frictional force is proportional to the polishing pressure, it is necessary to perform polishing with CMP at a low polishing pressure, but in general, if the polishing pressure is lowered, problems will occur when the polishing rate decreases. .
- a noble film such as tantalum or tantalum nitride is used as a stopper layer, and polishing may be stopped when the noble film appears on the film surface.
- polishing since polishing does not proceed at the same speed at any location on the surface to be polished during polishing, polishing is performed longer than the time required to remove excess metal film in order to secure a process margin. (This is called overpolish.) Therefore, since the polishing is performed even after the NOR film appears on the surface, the barrier film, which is a stopper layer, is not polished.
- the NORA film erosion is caused in which the thickness of the interlayer insulating film is reduced, and the flatness is lowered.
- the above (1) to (3) are problems specific to CMP in the damascene method that uses a NORA film as a stopper layer to remove excess wiring metal, and are uniform materials such as hard disk media and silicon wafers. The required performance is different from polishing for flattening. For this reason, it is difficult to solve these problems with a polishing composition for polishing a uniform material.
- a polishing composition using an azole compound such as benzotriazole or a derivative thereof is known (see, for example, Patent Documents 2 to 4).
- Benzotriazole has long been known as a compound that effectively prevents the corrosion of copper and copper alloys, and its anticorrosion effect is thought to cause a specific reaction with the copper surface.
- benzotriazole mainly acts with monovalent copper to form a polymer-like complex to form a strong film (see Non-Patent Document 1).
- the properties of the film vary depending on the pH, and in the acidic region lower than about pH 3.5, it is a thick carpet-like film, and in the weakly acidic to alkaline region, which is greater than about pH 3.5, a thin and dense film is produced. It is known.
- some benzotriazoles have the purpose of controlling the polishing rate and improving the flatness by forming a film generated in the course of action, which is effective for the purpose of inhibiting corrosion (for example, see Patent Document 2). .
- Patent Document 3 does not describe examples in which a water-soluble polymer is added. There is no description other than the addition of the above-described benzotriazole and its derivatives with respect to corrosion inhibition. Also, a metal polishing composition in which dodecylbenzenesulfonic acid and oleic acid are mixed has been proposed (see Patent Document 5). However, this alone is not sufficient for corrosion.
- Patent Documents 6 to 8 metal polishing compositions using pyridinecarboxylic acid have been proposed (see Patent Documents 6 to 8). According to these descriptions in Patent Documents 6 to 8, although pyridinecarboxylic acid is used for improving flatness and preventing scratches, corrosion suppression has not been studied.
- Patent Document 8 describes that the first polishing aqueous dispersion may contain a water-soluble polymer as a surfactant, if necessary.
- a water-soluble polymer as a surfactant
- Patent Document 9 a composition containing a first surfactant and a second surfactant as essential components and added with a pyridine carboxylic acid has been proposed (see Patent Document 9).
- a composition containing a first surfactant and a second surfactant as essential components and added with a pyridine carboxylic acid has been proposed (see Patent Document 9).
- dodecylbenzenesulfonic acid is described as the first surfactant
- nonionic surfactant and fatty acid are described as the second surfactant.
- nonionic surfactants such as polyoxyethylene lauryl ale as the second surfactant.
- Patent Document 10 it has been proposed to use a slurry of ceria and a bulurpyrrolidone / burimidazole copolymer for polishing metal such as copper (see Patent Document 10).
- the essence of the slurry is for polishing a silica film, and the metal film polishing example does not work, and such a slurry composition hardly polishes the metal film.
- Patent Document 1 Japanese Patent Laid-Open No. 10-116490
- Patent Document 2 JP-A-83780
- Patent Document 3 Japanese Patent Laid-Open No. 2005-183684
- Patent Document 4 Japanese Patent Laid-Open No. 11 21546
- Patent Document 5 Japanese Patent Laid-Open No. 2005-340755
- Patent Document 6 JP-A-9 55363
- Patent Document 7 Japanese Unexamined Patent Publication No. 2003-289055
- Patent Document 8 Japanese Unexamined Patent Application Publication No. 2005-45229
- Patent Document 9 JP 2002-155268 Koyuki
- Patent Document 10 Japanese Patent Application Laid-Open No. 2002-134444
- Non-patent document 1 Corrosion-inhibiting mechanism of benzotriazole inhibitors and their actions (Japan Defense Technology Association 1986)
- the present invention has been proposed in view of the above-described conventional circumstances, and ensures high polishing performance and flatness on the surface of the wiring metal while ensuring a sufficient polishing rate even under a low polishing pressure.
- Polishing composition capable of achieving both reduction of corrosion, polishing method using such polishing composition, method for producing substrate, plural kinds of compositions which become such polishing composition by mixing, and their It is an object to provide a method for using an assembly, such a composition or assembly as a transport or storage composition.
- the present invention provides the following means.
- A an oxidizing agent
- B at least one acid selected from amino acids, carboxylic acids having 8 or less carbon atoms, and inorganic acids
- C a concentration of 0.01% by mass or more.
- D a fatty acid having a concentration of 0.001% by mass or more and an alkyl group having 8 or more carbon atoms
- E a pyridinecarbonyl compound.
- Nonionic water-soluble polymer 2 pyrrolidone, N-methylpyrrolidone, 1,3 dimethylolone imidazolidinone, gramine, adenine, N, N'-diisopropylethylenediamine, N, N'-bis (2-hydroxyl Tinole)
- a polishing composition containing at least one selected from ethylenediamine, N, N, -dibenzethyleneethylenediamine, and N, N'-diphenylethylenediamine.
- polishing composition according to any one of (1) to (3), wherein the polishing composition is carboxylic acid having 8 or less carbon atoms and oxalic acid.
- Nonionic water-soluble polymer strength S polybulal alcohol, bull pyrrolidone (co) polymer, atalyloylmorpholine (co) polymer, N-isopropylacrylamide (co) polymer
- the polishing composition according to any one of 1) to (7).
- polishing composition according to any one of (1) to (13), further comprising a phosphate ester having an alkyl group having 8 or more carbon atoms.
- the concentration of the azole group-containing compound is from 0.001 to!% By mass (16) to (;
- polishing composition according to any one of (1) to (; 15), wherein the pH is 5 to 11;
- polishing composition according to any one of (16) to (21), wherein the pH is 7 to 11;
- polishing a metal film embedded on a substrate having a recess so as to cover the recess, or forming a barrier metal film on the substrate having a recess and embedding the metal film so as to cover the recess The polishing composition according to any one of the above items (1) to (24), for polishing a metal.
- a polishing method comprising polishing and planarizing with the polishing composition according to any one of (1) to (25) above.
- the nano metal film is tantalum or a tantalum alloy as described in (26) or (27) above. Polishing method.
- a method for producing a substrate comprising a step of polishing the substrate by the polishing method according to any one of (25) to (28).
- composition according to item (30) A method of using the composition according to item (30) as a composition for transportation or storage.
- polishing composition is an aggregate of a plurality of types of compositions, and the compositions are mixed or mixed and diluted with water. An assembly of multiple types of compositions from which the composition is made.
- a polishing composition capable of achieving both high flatness and reduced corrosion on the surface of a wiring metal while ensuring a sufficient polishing rate even under a low polishing pressure. I can do it. Therefore, it becomes easy to manufacture a substrate having excellent flatness by a polishing method and a substrate manufacturing method using such a polishing composition.
- a plurality of types of compositions that become such a polishing composition by mixing and their aggregates, and using such a composition or aggregate as a composition for transportation or storage, can be polished according to the present invention. The composition can be easily produced when needed.
- FIG. 1A is a cross-sectional view illustrating wiring formation by a damascene method.
- FIG. 1B is a cross-sectional view illustrating wiring formation by a damascene method.
- FIG. 1C is a cross-sectional view illustrating wiring formation by a damascene method.
- FIG. 2 is a cross-sectional view for explaining dishing.
- FIG. 3 is a cross-sectional view illustrating erosion.
- the polishing composition of the present invention comprises (A) an oxidizing agent, (B) at least one acid selected from amino acids, carboxylic acids having 8 or less carbon atoms, and inorganic acids, and (C) a concentration of 0. A sulfonic acid having 01% by mass or more and an alkyl group having 8 or more carbon atoms, (D) a fatty acid having a concentration of 0.001% by mass or more and having an alkyl group having 8 or more carbon atoms, (E ) Pyridinecarbonyl compounds, nonionic water-soluble polymers, 2-pyrrolidone, N-methylpyrrolidone, 1,3-dimethyl-2-imidazolidinone, gramine, adenine, N, N, diisopropylethylenediamine, N, N , Contains at least one selected from the group consisting of bis (2-hydroxyethynole) ethylenediamine, N, N, -dibenzylethylenediamine, N, N,
- (A) and (B) are etching agents for copper or a copper alloy as a wiring metal, and are practically sufficient for polishing. It is a necessary ingredient for speed.
- the above (C) and (D) suppress excessive etching action on copper or copper alloy, which is a wiring metal, exhibit step relief, and have high flatness without increasing dicing during overpolishing. It is a component necessary for obtaining a polished surface.
- the above (C) or (D) is a force capable of suppressing large corrosion that dissolves almost most of the wiring metal even when used alone. Corrosion suppression is insufficient and flatness is low. Let's do it. Therefore, in the polishing composition of the present invention, high flatness can be obtained by the combination of (C) and (D). In other words, the above (C) and (D) are combined with each other by combining these forces compared to the case of the force alone that is considered to be adsorbed on the surface of the wiring metal and exhibiting the function. It is presumed that the packing property of adsorption on the surface is improved, and as a result, high V and flatness can be obtained.
- the mixing ratio of (C) and (D) is preferably in the range of 1:50 to 50: 1, more preferably 1 : 30 to 30: 1, and more preferably 1:20 to 20: 1. When used within this mixing ratio range, the flatness becomes high.
- the polishing composition of the present invention ensures a sufficient polishing rate even under a low polishing pressure by combining the components (A), (B), (C), (D), and (E). In addition, it is possible to achieve both high flatness and reduced corrosion on the surface of the wiring metal.
- the oxidizing agent contained in the polishing composition of the present invention oxidizes a metal or a metal alloy and contributes to improvement of the polishing rate.
- oxidizers include oxygen, ozone, hydrogen peroxide, alkyl peroxides such as t-butyl hydride and peroxide oxyperoxide, peracids such as peracetic acid and perbenzoic acid, and permanganese.
- Permanganates such as acidium, periodate such as potassium periodate, ammonium persulfate persulfate such as potassium persulfate, hypochlorite such as potassium hypochlorite, A polyoxo acid etc. can be mentioned. Among them, it is preferable to use hydrogen peroxide or persulfate, which is easy to handle.
- the concentration of the oxidizing agent, 0.5 the total polishing composition 0;! ⁇ Is preferably (or 0.05 to 20 mass 0/0 than the preferred device to be 30 mass%, further ⁇ this preferred ( 0 to 10 mass 0 / 0. If the amount is less than this, the polishing rate may be too low, while if it is more than this, the force will be reduced if it is wasted. May end up.
- the acid contained in the polishing composition of the present invention is added to promote polishing as an etchant and to perform stable polishing.
- inorganic acids for example, sulfuric acid, phosphoric acid, phosphonic acid, nitric acid and the like can be cited by the force S.
- carboxylic acids having 8 or less carbon atoms for example, formic acid, acetic acid, propionic acid, butyric acid, valeric acid, 2-methylbutyric acid, n-hexanoic acid, 3,3-dimethylbutyric acid, 2-ethylbutyric acid, 4-methylpentanoic acid, n-heptanoic acid, 2-methylhexanoic acid, n-octanoic acid, 2-ethylhexanoic acid, benzoic acid, glyconolic acid, salicinoleic acid, glyceric acid, succinic acid, malonic acid, succinic acid, dartaric acid Carboxylic acids such as adipic acid, pimelic acid, maleic acid, phthalic acid, malic acid, tartaric acid, citrate, lactic acid, and salts thereof.
- carboxylic acids having 8 or less carbon atoms for example, formic acid, acetic acid, propionic acid, butyric acid
- amino acids for example, glycine, alanine, / 3-alanine, 2-aminobutyric acid, norpaline, valine, leucine, norleucine, isoleucine, aroisoleucine, phenylenolananine, proline, sarcosine, ornithine, lysine , Taurine, serine, threonine, alothreonine, homoserine, tyrosine, 3,5—Jodotyrosine, / 3 — (3,4-dihydroxyphenenole) alanine, thyroxine, 4-hydroxymonoproline, cysteine, methionine, Yet-nin, Lunch-nin, Cystatin-nin, Cystine, Cystic acid, Asparagine acid, Gnoretamic acid, S- (Carboxymethyl) monocystine, 4-aminobutyric acid, Asparagine,
- oxalic acid having a high polishing rate and high flatness.
- these acids can be used singly or in combination of two or more.
- the concentration of the acid is preferably 0.01 to 10% by mass, more preferably 0.02 to 5% by mass, and still more preferably 0.05 to 2% by mass with respect to the total polishing composition. It is. If it is less than this, it becomes difficult to obtain a high polishing rate. On the other hand, if it is more than this, the etching rate of metal or metal alloy becomes excessively high, and surface corrosion may increase or flatness may be lowered. .
- ⁇ (C) Sulfonic acid having an alkyl group with 8 or more carbon atoms The sulfonic acid in which the alkyl group contained in the polishing composition of the present invention has 8 or more carbon atoms contributes to the improvement of the level difference mitigation property of the wiring metal and contributes to the inhibition of corrosion.
- Examples of the sulfonic acid having an alkyl group having 8 or more carbon atoms include alkyl sulfonic acids such as decyl sulfonic acid, dodecyl sulfonic acid, decyl benzene sulfonic acid, undecyl benzene sulfonic acid, dodecyl benzene sulfonic acid, tridecyl sulfonic acid. Examples thereof include alkyl aromatic sulfonic acids such as decyl benzene sulfonic acid, tetradecyl benzene sulfonic acid, and alkylbenzene sulphone condensates which are mixtures thereof.
- dodecylbenzenesulfonic acid is preferably used.
- a salt such as potassium or ammonium can be used.
- the sulfonic acid having such an alkyl group having 8 or more carbon atoms one kind can be used at any time, or a mixture of two or more kinds can be used.
- the concentration of the sulfonic acid having a group is 0.01% by mass or more with respect to the total polishing composition, and 0.0;! To 5% by mass is preferable, more preferably 0.05 to; Yes, and more preferably 0.05-0.5 mass%. If it is less than this, the level difference relaxation property is not sufficient and the flatness is lowered. On the other hand, if it exceeds 5% by mass, the performance improvement is small and it is not economically advantageous.
- the fatty acid having an alkyl group of 8 or more carbon atoms contained in the polishing composition of the present invention is added in combination with the above (C) in order to improve the flatness and inhibit corrosion, and is particularly Effective for suppressing dishing during polishing.
- fatty acids having an alkyl group having 8 or more carbon atoms examples include caprylic acid, pelargonic acid, force puric acid, lauric acid, myristic acid, pentadecylic acid, palmitic acid, margaric acid, stearic acid, arakin.
- saturated fatty acids such as acid, behenic acid, lignoceric acid, serotic acid, montanic acid, and melicic acid, and unsaturated fatty acids such as eicosapentaenoic acid oleic acid, linoleic acid, and linolenic acid. Of these, it is preferable to use oleic acid.
- a mixture of fatty acids containing at least% may be used.
- salts such as potassium and ammonium can be used.
- the fatty acid having 8 or more carbon atoms in the alkyl group any one kind can be used, or two or more kinds can be mixed and used.
- the concentration of the fatty acid having an alkyl group having 8 or more carbon atoms is 0.001% by mass or more, preferably 0.00;! To 5% by mass, more preferably 0. 0% by mass with respect to the total polishing composition. 005 ⁇ ;! Mass%, more preferably 0.005-0. 5 mass%. If the amount is less than this, the surface roughness of the metal film is not sufficiently prevented. On the other hand, if the amount is more than 5% by mass, the remaining metal film on the barrier film may be formed.
- the compound (E) contained in the polishing composition of the present invention is added to suppress fine corrosion on the surface of the wiring metal that cannot be suppressed by the above (C) and (D).
- one type can be used at any time, or a mixture of two or more types can be used with force S.
- the concentration of (E) is preferably 0.0;! To 5% by mass, more preferably 0.0;! To 2% by mass, and still more preferably 0.01 to; !% By mass. If it is less than this, the effect of inhibiting corrosion will be small, while if it is more than this, it may be necessary to consider the increase in viscosity and the decrease in stability when using the polishing liquid.
- pyridinecarbonyl compounds include, for example, pyridine monocarboxylic acids such as picolinic acid and nicotinic acid, 2,3-pyridinedicarboxylic acid, and 2,5- Pyridinedicarboxylic acid, 2,6 pyridinedicarboxylic acid, 3,4 pyridinedicarboxylic acid, 3,5 pyridinedicarboxylic acid, 5,5'-dicarboxy 2,2'-bipyridine, etc. dicanolenic acid, picolinamide nicotinamide, Examples thereof include pyridinecarboxylic acid amides such as 3,4 pyridinedicarboxamide and 2,3 pyridine dicarboximide. Of these, picolinic acid and picolinamide are preferably used.
- nonionic water-soluble polymers for example, polybutyl alcohol, vinyl pyrrolidone (co) polymer, attalyloylmorpholine (co) polymer, N isopropyl atalylamide (co) polymer.
- polybutyl alcohol vinyl pyrrolidone (co) polymer
- attalyloylmorpholine co) polymer
- N isopropyl atalylamide co
- the nonionic water-soluble polymer preferably has a weight average molecular weight of 3000 to 150,000, more preferably 3000 to 1000000.
- Some nonionic water-soluble polymers are cationic in strongly acidic solutions with a pH of 1 or less, so the pH of the polishing composition may need to be higher.
- pH is 5 to 11; More preferably, pH is 7 to 11 l; and even more preferably, pH is 8 to 11
- nonionic water-soluble polymer it is preferable to use a non-soluble water-soluble polymer that is soluble in water at 25 ° C by 5 mass% or more.
- the hydrophilic group of the nonionic water-soluble polymer is preferably an alcoholic hydroxyl group or an amide group, more preferably an alcoholic hydroxyl group, a cyclic amide, or an N alkynole substituted amide group.
- the nonionic water-soluble polymer can be obtained, for example, as a polymer of a monomer having the nonionic hydrophilic group and the bur group.
- this monomer include acryloleamide, N-bulacetoamide, dimethylacrylamide, N-isopropylacrylamide, bull pyrrolidone, bull force prolatatam, attalyloylmorpholine, diacetone acrylamide and the like.
- the nonionic water-soluble polymer may be a homopolymer of these monomers or a copolymer.
- the above hydroxyl group may be introduced by a polymer reaction.
- polybutal alcohol obtained by saponification of a butyl acetate polymer may be used.
- the nonionic water-soluble polymer may be a copolymer obtained by copolymerizing a hydrophobic monomer as long as it can be dissolved in water by 5% by mass or more at 25 ° C.
- a hydrophobic monomer for example, styrene, N-t-octylacrylamide and the like can be cited with a force S.
- a water-soluble polymer having an anionic group such as polyacrylic acid does not suppress corrosion
- a water-soluble polymer having a cationic group such as polyethyleneimine is not suitable for polishing compositions when silica is used for abrasive grains. Since stability is impaired! /, Easy! /, It is not preferable to use any of them. However, as long as the desired performance is not impaired, the monomer having an anionic group or the monomer having a cationic property may be copolymerized with the monomer having a nonionic water-soluble group. .
- monomers having an anionic group include, for example, acrylic acid, metataric acid, maleic acid, itaconic acid, and salts thereof.
- examples of the monomer having a cationic property include allylamin, N, N-dimethylaminopropyl acrylamide, burimidazole, and the like, and the ability to list their salts.
- the salt includes quaternary salts.
- the content of the repeating unit derived from the monomer having an anionic group and the repeating unit derived from the monomer having a cationic property with respect to the polymer also varies depending on the amount of the polymer added to the polishing composition, so it is uniformly specified. However, it is usually 10% by mass or less, preferably 5% by mass or less. By introducing these anionic groups or cationic groups, the water solubility of the polymer can be improved.
- the monomer having a nonionic water-soluble group a hydrophobic monomer, a monomer having an anionic group, and a monomer having a cationic property, those having no ester bond are more preferably used. This is because the resulting polymer is added to an aqueous polishing composition, so that hydrolysis and ester bonds may impair stability.
- a known method can be used, and radial polymerization in an aqueous solution or an organic solvent is simple.
- This is a method in which a monomer is dissolved in a solvent and polymerized using a radical initiator such as azobisisoptyronitrile.
- a radical initiator such as azobisisoptyronitrile.
- dodecyl mercapta The molecular weight can also be adjusted by using a chain transfer agent such as trimethylolpropane tris (3-mercaptopropionate) or a-methylstyrene dimer.
- the polishing composition of the present invention can contain an abrasive for the purpose of improving the polishing rate of the wiring metal or reducing the wiring metal film residue on the barrier film.
- abrasive for example, silica, alumina, ceria, organic abrasive, etc. can be cited. Any one of these abrasives can be used, or a mixture of two or more can be used.
- silica as an abrasive that can cause scratches such as scratches to be applied to the substrate surface, and can suppress scratches while sufficiently increasing the polishing rate.
- an abrasive whose main component is colloidal silica produced by hydrolysis from alkoxysilane or water glass.
- the concentration of the abrasive is 30% by mass or less with respect to the total polishing composition, 0.0;! To 30% by mass is more preferable, preferably 0.;! To 20% by mass, and more preferably. 0.2 to 10% by mass. If it is more than this, datesing causes scratching, which is not preferable.
- the size of the abrasive is preferably 1 m or less, and more preferably 0.01 to 0.5 111. If the particle size is too small, the polishing rate cannot be increased sufficiently. On the other hand, if the particle size is too large, it may cause scratches on the metal surface such as scratches.
- the polishing composition of the present invention can contain a phosphate ester having an alkyl group having 8 or more carbon atoms for the purpose of further improving flatness.
- this phosphate ester include octyl phosphate, decyl phosphate, lauryl phosphate, myristyl phosphate, cetyl phosphate, stearyl phosphate, secondary alkyl (average 13 carbon atoms) phosphate, 2-ethylhexyl phosphate, oleyl phosphate.
- Alkyl phosphate esters such as acids, monostearyl glyceryl ether phosphate, monocetyl daryl seryl ether phosphate, monoaryl glyceryl ether phosphate, isostearyl glyceryl ether phosphate, polyoxyethylene octyl ether phosphate, polyoxyethylene Decyl ether phosphate, polyoxyethylene lauryl ether phosphate, polyoxyethylene myristyl ether phosphate, polyoxyethylene cetyl ether phosphate, polyoxyethylene stearyl ether phosphate, polyoxyethylene Secondary alkyl (average 13 carbon atoms) ether phosphoric acid, polyoxyethylene 2-ethyl hexyl ether phosphoric acid, polyoxyethylene 2-oleyl ether phosphoric acid, polyoxyethylene alkylene phenyl ether phosphoric acid, etc. Mention may be made of teralkyl phosphate esters. For such phosphate esters, salts such as potassium
- alkyl phosphoric acid having 8 to 18 carbon atoms such as octyl phosphoric acid, lauryl phosphoric acid, stearyl phosphoric acid, polyoxyethylene lauryl ether phosphoric acid and polyoxyethylene secondary alkyl (average carbon number 13) ether phosphoric acid. It is preferable to use a polyoxyalkylene ether phosphate ester, more preferably a polyoxyalkylene ether phosphate ester having 10 to 15 carbon atoms.
- any one kind can be used, or two or more kinds can be mixed and used.
- the concentration of the phosphate ester in which the alkyl group has 8 or more carbon atoms is preferably 5% by mass or less, more preferably 1% by mass or less, and still more preferably 0.5% by mass, based on the total polishing composition. It is below mass%. If it exceeds this, dating can be reduced, but it becomes difficult to apply it in practical performance where a high polishing rate is required.
- the polishing composition of the present invention can contain an azole group-containing compound having three or more azole groups in the molecule for the purpose of further improving the flatness.
- This azole group-containing compound can be produced by various methods.
- Azonole includes, for example, imidazole triazole, tetrazole, thiazole and the like, and some of them have reactive substituents such as hydroxyl group, carboxyl group and amino group. Specific examples include 4 carboxyl-1H-benzotriazole, 4 hydroxybenzotriazole, 2-aminoimidazole, and the like. Of these, the carboxyl group reacts with a polyhydric alcohol or polyamine to produce an ester or amide, respectively.
- an azole group-containing compound having three or more azole groups in the molecule can be produced.
- an azole group-containing compound having 3 or more azole groups in a molecule can be prepared by reacting an azole having a hydroxyl group or an amino group with a compound having a site that reacts with these. .
- the azole group-containing compound used in the present invention can be prepared by polymerizing an azole having a bur group.
- an azole having a bur group for example, 1-Buylimidazole, 2- [3- (2H-Benzotriazole-1yl) -4-hydroxyphenyl] ethyl methacrylate, etc. Can be mentioned.
- a polymer containing an azole unit having a bur group can be obtained by polymerizing a monomer which is an azole having a bur group.
- This monomer may be copolymerized alone or with other monomers.
- the molecular weight per azole group of the azole group-containing compound is preferably 90 to 300 S, and in particular, the azole group is contained so that the molecular weight per azole group is 90 to 200.
- the azole group-containing compound is preferably 90 to 300 S, and in particular, the azole group is contained so that the molecular weight per azole group is 90 to 200.
- acrylic acid methacrylic acid, methyl acrylate, methyl methacrylate, acrylamide, N-Bulacetoamide, N-Buluformamide, Ataliloylmorpholine, N-Buylpyrrolidone, Bule acetate, Styrene, etc.
- acrylic acid methacrylic acid
- methyl acrylate methyl methacrylate
- acrylamide N-Bulacetoamide
- N-Buluformamide Ataliloylmorpholine
- N-Buylpyrrolidone Bule acetate
- Styrene etc.
- a known method can be used, and a radial polymerization in an aqueous solution or an organic solvent is simple.
- This is a method in which a monomer is dissolved in a solvent and polymerized using a radical initiator such as azobisisoptyronitrile.
- a radical initiator such as azobisisoptyronitrile.
- dodecyl mercapta The molecular weight can also be adjusted by using a chain transfer agent such as trimethylolpropane tris (3-mercaptopropionate) or a-methylstyrene dimer.
- the molecular weight of such a polymer is such that the weight average molecular weight is 300 to 15,000 (preferably, preferably 500 to 10,000, more preferably 2000 to 8000, most preferably 4500 to 6500). It is.
- ⁇ is preferably 7 to 11, more preferably 8 to 11.
- the polishing composition of the present invention can contain an alkali as long as it does not adversely affect performance and physical properties.
- Alkali is used for the purpose of maintaining stable polishing performance, as a ⁇ adjuster, and as a buffer.
- alkalis include, in addition to ammonia, sodium hydroxide, potassium hydroxide, potassium carbonate, potassium hydrogen carbonate, ammonium hydrogen carbonate, methylamine ethylamine, propylamine, isopropylamine, butylamine, isobutylamine, Alkylmonoamines such as t-butylamine, aminoleamine, aranolamine, 2-ethylhexylamine, cyclohexylamine, benzylamine, and furfurylamine, monoamines with hydroxyl groups such as O-aminophenol and ethanolamine, 3 amino-1 propanol, and 2 amino-1 propanol , Ethylenediamine diethylenetriamine, triethylenetetramine, tetraethylenepentamine, pentaethylenehexamine, O-phenylenediamine Trimethylenediamine, 2,
- one type can be used at any time, or a mixture of two or more types can be used. Can do. Among these, it is preferable to use ammonia or potassium hydroxide.
- the concentration of alkali is preferably 10% by mass or less, more preferably 5% by mass or less, and further preferably 1% by mass or less, based on the total polishing composition.
- the polishing composition of the present invention can further reduce the corrosion of the wiring metal surface by containing an anticorrosive agent.
- anticorrosives examples include benzimidazole-2-thiol, 2- [2- (benzocaptobenzothiazole, 1, 2, 3 triazolene, 1, 2, 4 triazonole, 3 amino 1H-1, 2, 4— Triazole, benzotriazole, 1-hydroxybenzotriazole, 1-dihydroxypropyl benzotriazole, 2, 3 dicarboxypropyl benzotriazole, 4-hydroxybenzotriazole, 4-carboxyl 1H-benzotriazo monoole, 4-methoxycarbonoline 1H-Benzotriazolole, 4 Butoxycarbolulu 1H-Benzotriazole, 4-Octyloxycarbolulu 1H-Benzotriazole, 5-hexylbenzotriazole, N- (1, 2, 3-Benzotriazolinole 1-methyl) N- (1, 2, 4 triazolinole 1-methyl) -2 ethylhexyl Examples thereof include sylamine, trinotriazole, naph
- the concentration of the anticorrosive agent is preferably 1% by mass or less, more preferably 0.5% by mass or less, and still more preferably 0.01% by mass or less, based on the entire polishing composition.
- the polishing composition of the present invention is preferably used in the range of pH 2 to 12; more preferably pH 3 to ll, still more preferably pH 5 to 11;
- the reagent for adjusting the pH the above-mentioned inorganic acid, organic acid, alkali or the like can be used.
- the substrate having the metal film to be polished is pressed against the polishing cloth while supplying the polishing composition of the present invention onto the polishing cloth of the polishing platen.
- the metal film to be polished is polished by moving the polishing platen and the substrate relatively in the in-plane direction.
- a general polishing apparatus having a holder for holding a semiconductor substrate and a surface plate to which a polishing cloth is attached can be used.
- polishing is performed at 10 to 500 m / min. It is preferable. More preferably, it is 20-300 m / min, More preferably, it is 30-; 15 Om / min.
- the force required to rotate the polishing platen is required to rotate the substrate in order to maintain the uniformity of substrate polishing.
- the rotation of the substrate should be approximately the same as that of the polishing platen.
- the force that the substrate is pressed against the polishing cloth through the holder The pressure at this time is 0.;! ⁇ LOOKPa.
- 0.6 to 35 KPa is preferable, more preferably 0.6 to 20 KPa.
- These polishing conditions can also be changed during the polishing.
- the force S can be reduced by using a method of increasing or decreasing the rotation speed in half the polishing time.
- polishing cloth a general nonwoven fabric or foamed polyurethane can be used.
- Many polishing cloths are provided with grooves for the purpose of increasing the polishing speed and improving the discharge of the slurry.
- grooves with vertical and horizontal grooves XY group
- concentric grooves are used.
- K group There are things (K group) and combinations of them.
- any polishing cloth can be used.
- the polishing cloth can be dressed with a dresser with diamonds to prevent clogging and perform stable polishing. In this case, a generally known method can be used. .
- the polishing composition of the present invention When the polishing composition of the present invention is supplied to a polishing apparatus near the room temperature to be used, it is generally preferable because temperature adjustment (apparatus) is unnecessary.
- the temperature of the polishing composition can be adjusted and supplied to the polishing apparatus for the purpose of adjusting the polishing rate. In this case, it is preferable to supply at 0 to 100 ° C, more preferably 10 to 50 ° C, and further preferably 15 to 40 ° C. If the temperature is too low, the polishing rate will not increase, and if the temperature is lower than 0 ° C, it may freeze. Also, if the temperature is too high, undesirable side reactions may occur.
- the dripping amount of the polishing composition of the present invention with respect to the polishing apparatus is determined by the size of the polishing apparatus and the wafer. If an 8-inch wafer (200 mm wafer) is used, 10 to 1000 ml / min can be used. Preferably it is 50-500 ml / min, More preferably, it is 50-300 ml / min.
- the flow rate can be changed during the polishing, and for example, a method of increasing or decreasing the rotation speed in a half of the polishing time can be used.
- the polishing composition of the present invention As a method of supplying the polishing composition of the present invention onto the polishing cloth of the polishing platen, a method of continuously supplying with a pump or the like can be used. At this time, the polishing composition can be supplied in a plurality of types in consideration of the stability of the liquid that may be supplied as a single liquid containing all components. For example, there are a method of separately supplying a hydrogen peroxide solution and another solution, and a method of separately supplying a polishing solution mainly composed of abrasive grains and another solution. Also, with these supply methods, it is possible to supply a single solution immediately before the polishing cloth.
- a shape in which a plurality of lines are joined or a shape in which a plurality of liquids such as a temporary reservoir for mixing the polishing composition are mixed may be used. It is also possible to supply it directly on the polishing cloth in another line. At this time, the flow rate of each liquid may be changed during polishing. For example, when the two liquids are supplied separately, a method such as increasing or decreasing the dripping amount of one of the liquids in half the polishing time can be used.
- compositions that become polishing compositions and aggregates thereof Compositions that become polishing compositions and aggregates thereof.
- the polishing composition of the present invention may be stored separately in a plurality of types for each component at the time of transportation or storage in consideration of convenience of handling such as liquid stability, or a rich composition You may save as. For example, it is divided into two types: oxidant and other solutions. In addition, if abrasives are included as abrasives, those with abrasive grains as the main component are divided into a total of three types of compositions.
- the polishing composition of the present invention may be used after making it a thicker polishing composition than at the time of use, diluting with water or the like at the time of polishing, and adjusting to a concentration suitable for polishing.
- the composition can be 2 to 5 times thicker than when used.
- an aggregate of a plurality of types of compositions to be the polishing composition of the present invention can be constituted.
- the present invention provides a metal film embedded on a substrate having a recess so as to cover the recess, or a metal film formed so as to cover the recess by forming a barrier metal film on the substrate having a recess.
- a polishing method for flattening the substrate with the above-described polishing composition of the present invention and a method for producing a substrate including the step of polishing the substrate by such a polishing method are provided.
- metal film for example, aluminum, copper, iron, tungsten, and alloys thereof can be cited. Among these, it is preferable to use copper or a metal containing copper.
- a platinum group metal such as nickel, tantalum, titanium, ruthenium, platinum, or an alloy thereof can be cited. Of these, tantalum and tantalum nitride are preferred!
- interlayer insulating film for example, an inorganic interlayer insulating film containing a large amount of silicon such as a silicon oxide film, hydroxysilsesquioxane (HSQ), or methylsilsesquioxane (MSQ), benzocyclobutene
- HSQ hydroxysilsesquioxane
- MSQ methylsilsesquioxane
- organic interlayer insulation film such as a film made of Also used are low dielectric constant interlayer insulation films with holes in these interlayer insulation films.
- polishing there are two methods of polishing: there are a method in which the removal of the excess metal film and the removal of the barrier metal film are performed continuously in one polishing, or a method in which the polishing is divided into multiple polishings. Specifically, the removal of the excess metal film and the removal of the barrier metal film are performed by separate polishing. When the polishing composition of the present invention is used, it can be performed by a single polishing, but it is preferably used only for removing an excess metal film.
- the polishing composition of the present invention can be suitably used, for example, when forming a wiring by a damascene method as shown in FIG. Specifically, when forming a wiring using the damascene method, first, as shown in FIG. 1A, a groove (concave portion) 2 to be a wiring 2 ′ is provided in the interlayer insulating film 1 in advance, and this interlayer insulating film 1 A thin barrier film 4 is formed on the substrate. Then, a metal film 5 such as copper is formed thereon using a film forming method such as plating.
- the entire surface of the interlayer insulating film 1 including the groove 2 and the space 3 between the grooves 2 is covered with the metal film 5.
- the excess metal film 5 on the surface is removed by polishing, and the excess barrier film 4 on the surface is further removed by polishing, as shown in FIG. 1C.
- the surface of the interlayer insulating film 1 is exposed. As a result, the surface of the interlayer insulating film 1 is flattened, and the force S for forming the wiring 2 ′ composed of the metal film 5 embedded in the groove 2 is reduced.
- the polishing composition of the present invention can be suitably used for wiring formation in MRAM.
- a conductor layer made of aluminum or an aluminum alloy, or copper or a copper alloy, and a ferromagnetic layer made of nickel ferrous iron (permalloy) or the like are formed so as to surround the metal wiring.
- a nano film such as tantalum or tantalum nitride is formed thin so as to sandwich the ferromagnetic layer. Since these metal wirings are formed by the damascene method described above, excess conductor layers, ferromagnetic layers, and barrier films are planarized and removed by polishing using the polishing composition of the present invention.
- initiator solution 1 (Hereinafter referred to as the monomer solution) and 0.77 g of dimethyl 2,2′-azobis (2-methylpropionate) dissolved in 215 ⁇ 23 g of ⁇ -propanol (hereinafter referred to as initiator solution 1). ) And each were added with a metering pump. The addition time is 4 hours for both solutions. The reaction was continued for 1 hour after the addition of the monomer solution and the initiator solution 1. Furthermore, a solution (hereinafter referred to as initiator solution 2) prepared by dissolving 0 ⁇ 77 g of dimethyl 2,2, monoazobis (2-methylpropionate) in 14 ⁇ 63 g of n-propanol was added, followed by reaction for 5 hours. Continued.
- a 500 ml flask equipped with a thermometer, a stirrer, a nitrogen inlet tube and a reflux condenser was charged with 40 g of 2-propanol and heated to the reflux temperature (about 83 ° C.) while stirring in a nitrogen atmosphere.
- the reaction was continued for 1 hour after the monomer solution and the initiator solution 1 were added. Furthermore, Add a solution of methylol 2, 2, monoazobis (2-methylpropionate) 0 ⁇ 21 g in 2-prononorole 6.59 g (hereinafter referred to as initiator solution 2) and continue the reaction for 1 hour. Thereafter, the operation of adding the same initiator solution 2 and continuing the reaction for 1 hour (addition of additional initiator) was further repeated 5 times, and then the reaction was continued for 4 hours. After cooling to room temperature, about 380 g of a brown transparent solution was obtained. This brown transparent solution was concentrated on a rotary vacuum evaporator and dissolved in water twice, and the solvent was replaced with water from 2-propanol. The solid concentration was 15% and was used for slurry preparation without isolation. As a result of measuring the synthesized compound by GPC, the mass average molecular weight in terms of polyethylene glycol was 500,000.
- reaction liquid was concentrated with a rotary vacuum evaporator and dissolved in water. Concentration and water dissolution were performed once more, and the solvent was replaced with water from n-propanol. The solid concentration was 5% and was used for slurry preparation without isolation.
- the mass average molecular weight was 11000 in terms of polyethylene glycol.
- Blanket wafer A silicon wafer with a copper film and a tantalum film (barrier film) uniformly attached.
- Pattern wafer A silicon wafer with a groove depth of 500 nm, a thickness of 25 nm, tantalum formed as a barrier film, and a 1 lOOnm copper film attached (see Figure 1A).
- Blanket copper, tantalum film thickness measurement Sheet resistance was also measured.
- Measurement of polishing rate Measure copper film and barrier film thickness from electrical resistance values before and after polishing, Converted from between.
- polishing of pattern wafer When Mirra manufactured by Applied Materials was used as the polishing machine, the end point was detected by the standard end point detector, and the polishing was completed when it was overpolished for 20 seconds. When SH-24 manufactured by Speed Fam Co., Ltd. was used as the polishing machine, torque fluctuation was the end point, and polishing was completed when overpolished for 30 seconds. When a polishing machine manufactured by Nano Factor Co., Ltd. is used, the pattern wafer is overpolished by 30% with respect to the initial copper film thickness, based on the polishing rate when the above-mentioned pattern wafer is polished so that about 300 nm of copper remains. Polished. The measurement part of the copper film at the time of measuring the polishing rate was a part of the pattern in the vicinity of the part where the dating was evaluated.
- Table 1 the amount of each composition added is indicated by mass%.
- the additive other than Table 1 is water.
- APS ammonium persulfate
- DBS dodecylbenzenesulfonic acid
- POE polyoxyethylene secondary alkyl ether phosphate ester (alcohol made by adding average 3 mol of ethylene oxide to secondary alcohol with average carbon number of 13)
- OLA is oleic acid
- BZI is benzimidazole. Colloidal silica having a particle size of 120 nm was used.
- Table 2 shows the evaluation results of these Examples;! To 3 and Comparative Example 1.
- the center of the 100/100 H square pad of Ueno and the central 100/100 H square pad was observed by magnifying it 50000 times using SEM, and A when no corrosion was observed.
- the entire surface was corroded as G, and the evaluation was made in seven stages (A, B, C, D, E, F, G) according to the size of the corroded part.
- Examples 4 to 7 and Comparative Examples 2 to 4 8-inch wafers were evaluated using Mirr a manufactured by Applied Materials as a polishing machine. Polishing was performed at a relative speed of 75 m / min and a pressure of 14 kPa between the substrate and the polishing platen. IC1000 (k XY group) manufactured by Kuchi Dale Yutta Co., Ltd. was used as the polishing pad. The compositions of Examples 4 to 7 and Comparative Examples 2 to 4 are not shown in Table ⁇ 3.
- APS stands for ammonium persulfate
- DBS dodecylbenzenesulfonic acid
- PE polyoxyethylene secondary alkyl ether phosphate ester
- OLA oleic acid
- BZI benzimidazole.
- Colloidal silica having a particle size of 120 nm was used.
- Table 4 shows the evaluation results of Examples 4 to 7 and Comparative Examples 2 to 4. The evaluation of corrosion shown in Table 4 is the same as in Table 2.
- Example 4 using picolinic acid, the polishing rate, dating, and erosion were hardly changed as compared with Comparative Example 2, but the corrosion was remarkably improved. Further, even in Example 5 in which a bureimidazole-butyrpyrrolidone copolymer was used as a compound having three or more azole, corrosion was improved as compared with Comparative Example 3 in which picolinic acid was not added.
- Example 6 in which polybutyrrolidone, a nonionic water-soluble polymer, was added in addition to picolinic acid, a copper surface with improved corrosion was also observed.
- Example 7 in addition to the polymer having 3 or more azoles, polyoxyethylene secondary alkyl alephosphate was added as a surfactant, and picolinic acid was added as an anticorrosive material other than azole. In this case, the corrosion was remarkably improved as compared with Comparative Example 7 in which picolinic acid was not added.
- Examples 8 to 27, Comparative Examples 5 to 10 In Examples 8 to 27 and Comparative Examples 5 to 10; a polishing machine manufactured by Nano Factor Co., Ltd. was used as the polishing machine. A wafer obtained by cutting the 8-inch wafer into 4 ⁇ 4 cm was used. Polishing was performed at a relative speed of 70 m / min between the substrate and the polishing plate, a pressure of 15 kPa, and a flow rate of 6.8 ml / min. As a polishing pad, IC1400 (k—XY group) manufactured by Kuchi Dale Yutta Co., Ltd. was used. Tables 5 and 6 show the compositions of Examples 8 to 27 and Comparative Examples 5 to 10;
- Tables 5 and 6 the amount added is indicated by mass%.
- the additive other than Tables 5 and 6 is water.
- APS ammonium persulfate
- DBS dodecylbenzenesulfonic acid
- POE polyoxyethylene secondary alkyl ether phosphate ester
- OLA oleic acid
- BZI benzimidazole
- PAA polyacrylic acid (average molecular weight 25000 , Manufactured by Wako Pure Chemical Industries, Ltd.). Colloidal silica having a particle size of 120 nm was used.
- Luvitec K17 mass average molecular weight 9000
- Luvitec K30 mass average molecular weight 45000
- Luvitec K85 mass average molecular weight 900000
- BASF BASF Polybula prolatatam
- PVA203 average polymerization degree 300
- PVA203 average polymerization degree 300
- UD-350W polyurethane polyol
- Surfynol 465 is an acetylenic dialcohol polyether product (Air Products Japan)
- Emulgen 120 is poly Oxyethylene (12) lauryl ether (manufactured by Kao) is shown.
- Table 7 shows the evaluation results of Examples 8 to 27 and Comparative Examples 5 to 10: Table
- Examples 8 to 19 are examples in which a nonionic water-soluble polymer was used as (E).
- the polishing rate was almost the same as that of the comparative example, although Example 19 was slightly decreased.
- Examples 20 to 27 are 2-pyrrolidone, N-methylpyrrolidone, 1,3-dimethyl-2-imidazolidinone, gramine, adenine, N, ⁇ '-diisopropylethylenediamin, ⁇ , ⁇ '-bis (2 —Hydroxyethylenediamine), N, N′-Dipentinoleethylenediamine, which was used, was confirmed to have a corrosion inhibiting effect as compared with Comparative Example 5.
- Example 27 the dishing can be increased and corrosion can be suppressed by ⁇ , ⁇ ′-dibenzylethylenediamine.
- the force which is obtained by adding an anionic water-soluble polymer to the composition of Comparative Example 5, greatly increases the corrosion when the force dicing is remarkably increased.
- Comparative Examples 8 and 9 although dating is improved, the surface corrosion state is poor and the polishing rate is low.
- Comparative Example 10 when 0.9 wt% glycine is added to secure a force polishing rate using a high-fouling ability against copper, the corrosion state of the surface is significantly worsened.
- the present invention can be applied to a polishing composition suitably used for polishing a metal film formed on a substrate, and a technique related to such a polishing composition.
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Description
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US12/375,325 US20090289217A1 (en) | 2006-07-28 | 2007-07-26 | Polishing composition |
CN200780027880XA CN101496143B (zh) | 2006-07-28 | 2007-07-26 | 研磨组合物 |
JP2008526804A JPWO2008013226A1 (ja) | 2006-07-28 | 2007-07-26 | 研磨組成物 |
EP07791371A EP2075824A4 (en) | 2006-07-28 | 2007-07-26 | POLISHING COMPOSITION |
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PCT/JP2007/064671 WO2008013226A1 (fr) | 2006-07-28 | 2007-07-26 | Composition de polissage |
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EP (1) | EP2075824A4 (ja) |
JP (1) | JPWO2008013226A1 (ja) |
KR (1) | KR20090020709A (ja) |
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Also Published As
Publication number | Publication date |
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JPWO2008013226A1 (ja) | 2009-12-17 |
US20090289217A1 (en) | 2009-11-26 |
TW200829686A (en) | 2008-07-16 |
EP2075824A4 (en) | 2011-05-04 |
CN101496143B (zh) | 2011-04-06 |
CN101496143A (zh) | 2009-07-29 |
EP2075824A1 (en) | 2009-07-01 |
TWI437083B (zh) | 2014-05-11 |
KR20090020709A (ko) | 2009-02-26 |
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