JP4493012B2 - レジスト用重合体およびレジスト組成物 - Google Patents
レジスト用重合体およびレジスト組成物 Download PDFInfo
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- JP4493012B2 JP4493012B2 JP2004196504A JP2004196504A JP4493012B2 JP 4493012 B2 JP4493012 B2 JP 4493012B2 JP 2004196504 A JP2004196504 A JP 2004196504A JP 2004196504 A JP2004196504 A JP 2004196504A JP 4493012 B2 JP4493012 B2 JP 4493012B2
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- 229920000642 polymer Polymers 0.000 title claims description 77
- 239000000203 mixture Substances 0.000 title claims description 43
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 24
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 22
- 125000004432 carbon atom Chemical group C* 0.000 claims description 12
- 125000000217 alkyl group Chemical group 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 11
- 239000000758 substrate Substances 0.000 claims description 11
- 229910052799 carbon Inorganic materials 0.000 claims description 9
- UMRZSTCPUPJPOJ-KNVOCYPGSA-N norbornane Chemical group C1C[C@H]2CC[C@@H]1C2 UMRZSTCPUPJPOJ-KNVOCYPGSA-N 0.000 claims description 4
- 125000004093 cyano group Chemical group *C#N 0.000 claims description 2
- 125000006165 cyclic alkyl group Chemical group 0.000 claims description 2
- -1 tert-amyl Chemical group 0.000 description 45
- 239000000178 monomer Substances 0.000 description 44
- 239000000243 solution Substances 0.000 description 25
- 239000002904 solvent Substances 0.000 description 21
- 239000002245 particle Substances 0.000 description 20
- 238000006116 polymerization reaction Methods 0.000 description 20
- 238000000034 method Methods 0.000 description 19
- 239000002253 acid Substances 0.000 description 18
- 229920001577 copolymer Polymers 0.000 description 17
- LLHKCFNBLRBOGN-UHFFFAOYSA-N propylene glycol methyl ether acetate Chemical compound COCC(C)OC(C)=O LLHKCFNBLRBOGN-UHFFFAOYSA-N 0.000 description 16
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 13
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 13
- 230000007547 defect Effects 0.000 description 13
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 12
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 12
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 11
- 238000001459 lithography Methods 0.000 description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 10
- 238000006243 chemical reaction Methods 0.000 description 10
- 230000035945 sensitivity Effects 0.000 description 10
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical compound N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 description 9
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 9
- 239000012986 chain transfer agent Substances 0.000 description 9
- 239000003505 polymerization initiator Substances 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 8
- 150000001875 compounds Chemical class 0.000 description 8
- 238000011161 development Methods 0.000 description 8
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- 239000010408 film Substances 0.000 description 8
- 238000005259 measurement Methods 0.000 description 8
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- 150000003254 radicals Chemical group 0.000 description 8
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 7
- 150000002596 lactones Chemical group 0.000 description 7
- 239000003960 organic solvent Substances 0.000 description 7
- 230000002829 reductive effect Effects 0.000 description 7
- 239000011347 resin Substances 0.000 description 7
- 229920005989 resin Polymers 0.000 description 7
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 6
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 6
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 6
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 6
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 description 6
- LZCLXQDLBQLTDK-UHFFFAOYSA-N ethyl 2-hydroxypropanoate Chemical compound CCOC(=O)C(C)O LZCLXQDLBQLTDK-UHFFFAOYSA-N 0.000 description 6
- 229910052698 phosphorus Inorganic materials 0.000 description 6
- 239000011574 phosphorus Substances 0.000 description 6
- 239000002244 precipitate Substances 0.000 description 6
- 238000003756 stirring Methods 0.000 description 6
- YEJRWHAVMIAJKC-UHFFFAOYSA-N 4-Butyrolactone Chemical compound O=C1CCCO1 YEJRWHAVMIAJKC-UHFFFAOYSA-N 0.000 description 5
- OZAIFHULBGXAKX-VAWYXSNFSA-N AIBN Substances N#CC(C)(C)\N=N\C(C)(C)C#N OZAIFHULBGXAKX-VAWYXSNFSA-N 0.000 description 5
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 5
- 239000003513 alkali Substances 0.000 description 5
- 238000009826 distribution Methods 0.000 description 5
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 229910052757 nitrogen Inorganic materials 0.000 description 5
- 239000012299 nitrogen atmosphere Substances 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- NTIZESTWPVYFNL-UHFFFAOYSA-N Methyl isobutyl ketone Chemical compound CC(C)CC(C)=O NTIZESTWPVYFNL-UHFFFAOYSA-N 0.000 description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 4
- DTQVDTLACAAQTR-UHFFFAOYSA-N Trifluoroacetic acid Chemical compound OC(=O)C(F)(F)F DTQVDTLACAAQTR-UHFFFAOYSA-N 0.000 description 4
- 239000000654 additive Substances 0.000 description 4
- WPYMKLBDIGXBTP-UHFFFAOYSA-N benzoic acid Chemical compound OC(=O)C1=CC=CC=C1 WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 description 4
- 150000001721 carbon Chemical group 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 238000007334 copolymerization reaction Methods 0.000 description 4
- ZSWFCLXCOIISFI-UHFFFAOYSA-N cyclopentadiene Chemical compound C1C=CC=C1 ZSWFCLXCOIISFI-UHFFFAOYSA-N 0.000 description 4
- 238000000609 electron-beam lithography Methods 0.000 description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N ethylene glycol Natural products OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 4
- FWYUJGXEYOXHRJ-UHFFFAOYSA-N fluoromethyl prop-2-enoate Chemical compound FCOC(=O)C=C FWYUJGXEYOXHRJ-UHFFFAOYSA-N 0.000 description 4
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 4
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- JOXIMZWYDAKGHI-UHFFFAOYSA-N toluene-4-sulfonic acid Chemical compound CC1=CC=C(S(O)(=O)=O)C=C1 JOXIMZWYDAKGHI-UHFFFAOYSA-N 0.000 description 4
- 0 *C(*)(C1*C2(*)CC1)C2(*)OC(C(*)=C*)=O Chemical compound *C(*)(C1*C2(*)CC1)C2(*)OC(C(*)=C*)=O 0.000 description 3
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 description 3
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 3
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 description 3
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- DKGAVHZHDRPRBM-UHFFFAOYSA-N Tert-Butanol Chemical compound CC(C)(C)O DKGAVHZHDRPRBM-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 239000002585 base Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- 238000001312 dry etching Methods 0.000 description 3
- 150000002148 esters Chemical class 0.000 description 3
- 238000005530 etching Methods 0.000 description 3
- 229940116333 ethyl lactate Drugs 0.000 description 3
- 238000010528 free radical solution polymerization reaction Methods 0.000 description 3
- 238000005227 gel permeation chromatography Methods 0.000 description 3
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 3
- VHRYZQNGTZXDNX-UHFFFAOYSA-N methacryloyl chloride Chemical compound CC(=C)C(Cl)=O VHRYZQNGTZXDNX-UHFFFAOYSA-N 0.000 description 3
- 239000007800 oxidant agent Substances 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 3
- 238000002834 transmittance Methods 0.000 description 3
- LYGKSUOGJYYSOI-UHFFFAOYSA-N 2-methoxybuta-1,3-diene Chemical compound COC(=C)C=C LYGKSUOGJYYSOI-UHFFFAOYSA-N 0.000 description 2
- BDFAOUQQXJIZDG-UHFFFAOYSA-N 2-methylpropane-1-thiol Chemical compound CC(C)CS BDFAOUQQXJIZDG-UHFFFAOYSA-N 0.000 description 2
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 2
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 2
- 239000005711 Benzoic acid Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-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
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- UIHCLUNTQKBZGK-UHFFFAOYSA-N Methyl isobutyl ketone Natural products CCC(C)C(C)=O UIHCLUNTQKBZGK-UHFFFAOYSA-N 0.000 description 2
- KFSLWBXXFJQRDL-UHFFFAOYSA-N Peracetic acid Chemical compound CC(=O)OO KFSLWBXXFJQRDL-UHFFFAOYSA-N 0.000 description 2
- ABLZXFCXXLZCGV-UHFFFAOYSA-N Phosphorous acid Chemical compound OP(O)=O ABLZXFCXXLZCGV-UHFFFAOYSA-N 0.000 description 2
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- WQDUMFSSJAZKTM-UHFFFAOYSA-N Sodium methoxide Chemical compound [Na+].[O-]C WQDUMFSSJAZKTM-UHFFFAOYSA-N 0.000 description 2
- HEDRZPFGACZZDS-MICDWDOJSA-N Trichloro(2H)methane Chemical compound [2H]C(Cl)(Cl)Cl HEDRZPFGACZZDS-MICDWDOJSA-N 0.000 description 2
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 description 2
- 235000011054 acetic acid Nutrition 0.000 description 2
- 239000003377 acid catalyst Substances 0.000 description 2
- ORILYTVJVMAKLC-UHFFFAOYSA-N adamantane Chemical group C1C(C2)CC3CC1CC2C3 ORILYTVJVMAKLC-UHFFFAOYSA-N 0.000 description 2
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- 230000032683 aging Effects 0.000 description 2
- 125000002723 alicyclic group Chemical group 0.000 description 2
- 150000001336 alkenes Chemical class 0.000 description 2
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 2
- MTHSVFCYNBDYFN-UHFFFAOYSA-N anhydrous diethylene glycol Natural products OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 2
- 125000003118 aryl group Chemical group 0.000 description 2
- 235000010233 benzoic acid Nutrition 0.000 description 2
- UORVGPXVDQYIDP-UHFFFAOYSA-N borane Chemical compound B UORVGPXVDQYIDP-UHFFFAOYSA-N 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000004440 column chromatography Methods 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 description 2
- 125000000113 cyclohexyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])C1([H])[H] 0.000 description 2
- BGTOWKSIORTVQH-UHFFFAOYSA-N cyclopentanone Chemical compound O=C1CCCC1 BGTOWKSIORTVQH-UHFFFAOYSA-N 0.000 description 2
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- JXTHNDFMNIQAHM-UHFFFAOYSA-N dichloroacetic acid Chemical compound OC(=O)C(Cl)Cl JXTHNDFMNIQAHM-UHFFFAOYSA-N 0.000 description 2
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- 238000004821 distillation Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010894 electron beam technology Methods 0.000 description 2
- XLLIQLLCWZCATF-UHFFFAOYSA-N ethylene glycol monomethyl ether acetate Natural products COCCOC(C)=O XLLIQLLCWZCATF-UHFFFAOYSA-N 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
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- 238000010438 heat treatment Methods 0.000 description 2
- OGBAEJNSZKSDFD-UHFFFAOYSA-N heptan-2-yl 2-methylprop-2-enoate Chemical compound CCCCCC(C)OC(=O)C(C)=C OGBAEJNSZKSDFD-UHFFFAOYSA-N 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- XMBWDFGMSWQBCA-UHFFFAOYSA-N hydrogen iodide Chemical compound I XMBWDFGMSWQBCA-UHFFFAOYSA-N 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- DCUFMVPCXCSVNP-UHFFFAOYSA-N methacrylic anhydride Chemical compound CC(=C)C(=O)OC(=O)C(C)=C DCUFMVPCXCSVNP-UHFFFAOYSA-N 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- XNLICIUVMPYHGG-UHFFFAOYSA-N pentan-2-one Chemical compound CCCC(C)=O XNLICIUVMPYHGG-UHFFFAOYSA-N 0.000 description 2
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 125000006239 protecting group Chemical group 0.000 description 2
- 238000010526 radical polymerization reaction Methods 0.000 description 2
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- YGSDEFSMJLZEOE-UHFFFAOYSA-N salicylic acid Chemical compound OC(=O)C1=CC=CC=C1O YGSDEFSMJLZEOE-UHFFFAOYSA-N 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000012488 sample solution Substances 0.000 description 2
- 125000002914 sec-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 2
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- 238000012546 transfer Methods 0.000 description 2
- ITMCEJHCFYSIIV-UHFFFAOYSA-N triflic acid Chemical compound OS(=O)(=O)C(F)(F)F ITMCEJHCFYSIIV-UHFFFAOYSA-N 0.000 description 2
- GETQZCLCWQTVFV-UHFFFAOYSA-N trimethylamine Chemical compound CN(C)C GETQZCLCWQTVFV-UHFFFAOYSA-N 0.000 description 2
- FAYMLNNRGCYLSR-UHFFFAOYSA-M triphenylsulfonium triflate Chemical compound [O-]S(=O)(=O)C(F)(F)F.C1=CC=CC=C1[S+](C=1C=CC=CC=1)C1=CC=CC=C1 FAYMLNNRGCYLSR-UHFFFAOYSA-M 0.000 description 2
- QSUJHKWXLIQKEY-UHFFFAOYSA-N (2-oxooxolan-3-yl) 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OC1CCOC1=O QSUJHKWXLIQKEY-UHFFFAOYSA-N 0.000 description 1
- JHPBZFOKBAGZBL-UHFFFAOYSA-N (3-hydroxy-2,2,4-trimethylpentyl) 2-methylprop-2-enoate Chemical compound CC(C)C(O)C(C)(C)COC(=O)C(C)=C JHPBZFOKBAGZBL-UHFFFAOYSA-N 0.000 description 1
- VZMYODQWFVQXNC-UHFFFAOYSA-M (4-methylphenyl)-diphenylsulfanium;1,1,2,2,3,3,4,4,4-nonafluorobutane-1-sulfonate Chemical compound [O-]S(=O)(=O)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F.C1=CC(C)=CC=C1[S+](C=1C=CC=CC=1)C1=CC=CC=C1 VZMYODQWFVQXNC-UHFFFAOYSA-M 0.000 description 1
- AAXOTDCQXGEXPY-UHFFFAOYSA-N (5-cyano-3-bicyclo[2.2.1]heptanyl) 2-methylprop-2-enoate Chemical compound C1C(C#N)C2C(OC(=O)C(=C)C)CC1C2 AAXOTDCQXGEXPY-UHFFFAOYSA-N 0.000 description 1
- 229920002818 (Hydroxyethyl)methacrylate Polymers 0.000 description 1
- DSSYKIVIOFKYAU-XCBNKYQSSA-N (R)-camphor Chemical group C1C[C@@]2(C)C(=O)C[C@@H]1C2(C)C DSSYKIVIOFKYAU-XCBNKYQSSA-N 0.000 description 1
- BJEPYKJPYRNKOW-REOHCLBHSA-N (S)-malic acid Chemical compound OC(=O)[C@@H](O)CC(O)=O BJEPYKJPYRNKOW-REOHCLBHSA-N 0.000 description 1
- BQCIDUSAKPWEOX-UHFFFAOYSA-N 1,1-Difluoroethene Chemical compound FC(F)=C BQCIDUSAKPWEOX-UHFFFAOYSA-N 0.000 description 1
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- 239000010409 thin film Substances 0.000 description 1
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 1
- IMFACGCPASFAPR-UHFFFAOYSA-N tributylamine Chemical compound CCCCN(CCCC)CCCC IMFACGCPASFAPR-UHFFFAOYSA-N 0.000 description 1
- YNJBWRMUSHSURL-UHFFFAOYSA-N trichloroacetic acid Chemical compound OC(=O)C(Cl)(Cl)Cl YNJBWRMUSHSURL-UHFFFAOYSA-N 0.000 description 1
- YFTHZRPMJXBUME-UHFFFAOYSA-N tripropylamine Chemical compound CCCN(CCC)CCC YFTHZRPMJXBUME-UHFFFAOYSA-N 0.000 description 1
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Description
本発明第二の要旨は、式(1)で表される構成単位が式(1−1)で表される構成単位
である前記レジスト用重合体である。
式(1−1)で表されるエキソ型は酸脱離性能が高い点で好ましい。
本明細書において、「(メタ)アクリル酸」とは、メタクリル酸とアクリル酸との総称である。「(メタ)アクリル酸エステル」とは、メタクリル酸エステルとアクリル酸エステルの総称である。
α−(トリ)フルオロメチルアクリル酸メチル、α−(トリ)フルオロメチルアクリル酸エチル、α−(トリ)フルオロメチルアクリル酸2−エチルヘキシル、α−(トリ)フルオロメチルアクリル酸n−プロピル、α−(トリ)フルオロメチルアクリル酸イソプロピル、α−(トリ)フルオロメチルアクリル酸n−ブチル、α−(トリ)フルオロメチルアクリル酸イソブチル、α−(トリ)フルオロメチルアクリル酸tert−ブチル、α−(トリ)フルオロメチルアクリル酸メトキシメチル等の直鎖または分岐構造を有するα−置換(メタ)アクリル酸エステル;
(メタ)アクリル酸、マレイン酸、無水マレイン酸、イタコン酸、無水イタコン酸等の不飽和カルボン酸およびカルボン酸無水物;
エチレン、プロピレン、ノルボルネン、テトラフルオロエチレン、アクリルアミド、N−メチルアクリルアミド、N,N−ジメチルアクリルアミド、塩化ビニル、フッ化ビニル、フッ化ビニリデン、ビニルピロリドン等が挙げられる。
3.本発明のレジスト用重合体の製造方法
本発明のレジスト用重合体は、通常、重合開始剤の存在下で、単量体組成物を共重合して得られる。重合方法は限定されないが、ラジカル重合によって重合させることが低コストで製造できることから好ましい。
過率(波長193nmの光に対する透過率)をできるだけ低下させない点から、用いる重合開始剤としては、分子構造中に芳香環を有しないものが好ましい。さらに、重合時の安全性等を考慮すると、用いる重合開始剤としては、10時間半減期温度が60℃以上のものが好ましい。
4.本発明のレジスト組成物
本発明のレジスト組成物は、上記のような本発明のレジスト用重合体を溶剤に溶解したものである。また、本発明のレジスト組成物は、上記のような本発明のレジスト用重合体および光酸発生剤を溶剤に溶解したものである。本発明のレジスト用重合体は、1種を用いても、2種以上を併用してもよい。なお、溶液重合等によって得られた重合体溶液から重合体を分離することなく、この重合体溶液をそのまま、または、適当な溶剤で希釈して、または濃縮してレジスト組成物に使用することもできる。
布する際の塗布むらや現像時のスカム等の発生が十分に少なくなる。
5.本発明のパターン製造方法
次に、本発明のパターン製造方法の一例について説明する。
約20mgのレジスト用重合体を5mLのTHFに溶解し、0.5μmメンブランフィルターで濾過して試料溶液を調製し、この試料溶液を東ソー製ゲル・パーミエーション・クロマトグラフィー(GPC)を用いて測定した。この測定は、分離カラムは昭和電工社製、Shodex GPC K−805L(商品名)を3本直列にしたものを用い、溶剤はTHF、流量1.0mL/min、検出器は示差屈折計、測定温度40℃、注入量0.1mLで、標準ポリマーとしてポリスチレンを使用して測定した。
1H−NMRの測定により求めた。この測定は、日本電子(株)製、GSX−400型FT−NMR(商品名)を用いて、約5質量%のレジスト用重合体試料の重水素化クロロホルム、重水素化アセトンあるいは重水素化ジメチルスルホキシドの溶液を直径5mmφの試験管に入れ、測定温度40℃、観測周波数400MHz、シングルパルスモードにて、64回の積算で行った。
製造したレジスト用重合体100部と、光酸発生剤であるトリフェニルスルホニウムトリフレート2部と、溶剤であるPGMEA700部とを混合して均一溶液とした後、孔径0.1μmのメンブランフィルターで濾過し、レジスト組成物溶液を調製した。
調製したレジスト組成物溶液をシリコンウエハー(直径:200mm)上にスピンコートし、ホットプレートを用いて120℃、60秒間プリベークを行い、膜厚0.4μmのレジスト膜を形成した。次いで、ArFエキシマレーザー露光機(波長:193nm)を使用して露光した後、ホットプレートを用いて120℃、60秒間露光後ベークを行った。次いで、2.38質量%水酸化テトラメチルアンモニウム水溶液を用いて室温で現像し、純水で洗浄し、乾燥してレジストパターンを形成した。
0.16μmのライン・アンド・スペースパターンのマスクが0.16μmの線幅に転写される露光量(mJ/cm2)を感度として測定した。
前記露光量で露光したときに解像されるレジストパターンの最小寸法(μm)を解像度とした。
マスクにおける0.20μmのレジストパターンを再現する最小露光量により得られた0.20μmのレジストパターンの長手方向の側端5μmの範囲について、日本電子製、JSM−6340F型電界放射形走査型電子顕微鏡(商品名)により、パターン側端があるべき基準線からの距離を50ポイント測定し、標準偏差を求めて3σを算出した。この値が小さいほど良好な性能であることを示す。
上記のようにして得られたレジストパターンについて、KLAテンコール社製表面欠陥観察装置KLA2132により、現像欠陥数を測定した。
調製したレジスト組成物溶液について、調液直後の溶液中のパーティクルの数(パーティクル初期値)と、4℃で1週間放置した後の溶液中のパーティクルの数(経時後のパーティクルの数)とをリオン製パーティクルカウンターにて測定した。そして、パーティクル初期値とともに、(経時後のパーティクルの数)−(パーティクル初期値)で計算されるパーティクル増加数を評価した。
<実施例1>
窒素導入口、攪拌機、コンデンサーおよび温度計を備えたフラスコに、窒素雰囲気下で、プロピレングリコールモノメチルエーテルアセテート(以下、PGMEAと言う。)137.7部を入れ、攪拌しながら湯浴の温度を80℃に上げた。2−エチル−1,3,3,トリメチルビシクロ[2.1.1]ヘプタン−2−イル−メタクリレート(エキソ型とエンド型の混合物。以下、M1と言う。)
100.5部、2−または3−シアノ−5−ノルボルニルメタクリレート(以下、CNNMAと言う。)41.2部、α−メタクリロイルオキシ−γ−ブチロラクトン(以下、GBLMAと言う。)68.3部、PGMEA 255.7部および2,2’−アゾビスイソブチロニトリル(以下、AIBNと言う。)16.4部を混合した単量体溶液を、滴下装置を用い、一定速度で6時間かけてフラスコ中へ滴下し、その後、80℃で1時間保持した。次いで、得られた反応溶液を約30倍量のメタノール中に攪拌しながら滴下し、白色の析出物の沈殿(共重合体A−1)を得た。沈殿物に残存する単量体を取り除くために、得られた沈殿を濾別し、重合に使用した単量体に対して約30倍量のメタノール中で沈殿を洗浄した。そして、この沈殿を濾別し、減圧下50℃で約40時間乾燥した。得られた共重合体A−1の各物性を測定した結果を表1に示す。
M1の代わりに2−エチル−1,7,7,トリメチルビシクロ[2.1.1]ヘプタン−2−イル−メタクリレート(エキソ型とエンド型の混合物。以下、M2と言う。)を用いた以外は実施例1と同様にして共重合体A−2を得た。
窒素導入口、攪拌機、コンデンサーおよび温度計を備えたフラスコに、窒素雰囲気下で、PGMEA119.6部を入れ、攪拌しながら湯浴の温度を80℃に上げた。M2 87.3部、1−メタクリロイルオキシ−3−ヒドロキシアダマンチル(以下、HAdMAと言う。)41.2部、GBLMA59.4部、PGMEA222.1部およびAIBN 14.2部を混合した単量体溶液を、滴下装置を用い、一定速度で6時間かけてフラスコ中へ滴下し、その後、80℃で1時間保持した。以降の操作は実施例1と同様にして共重合体A−3を得た。得られた共重合体A−3の各物性を測定した結果を表1に示す。
<実施例4>
窒素導入口、攪拌機、コンデンサーおよび温度計を備えたフラスコに、窒素雰囲気下で、PGMEA123.9部を入れ、攪拌しながら湯浴の温度を80℃に上げた。2−エチルビシクロ[2.2.1]ヘプタン−exo−2−イル−メタクリレート(以下、M3と言う。)83.6部
CNNMA 41.2部、GBLMA68.3部、PGMEA230.1部およびAIBN 16.4部を混合した単量体溶液を、滴下装置を用い、一定速度で6時間かけてフラスコ中へ滴下し、その後、80℃で1時間保持した。以降の操作は実施例1と同様にして共重合体A−4を得た。得られた共重合体A−4の各物性を測定した結果を表1に示す。
窒素導入口、攪拌機、コンデンサーおよび温度計を備えたフラスコに、窒素雰囲気下で、PGMEA 149.7部を入れ、攪拌しながら湯浴の温度を80℃に上げた。2−エチル−エチルトリシクロ[5.2.1.02,6]デカン−exo−8−イル−メタクリレート(以下、M4と言う)278.1部、HAdMA 47.3部、GBLMA34.0部、PGMEA222.1部およびAIBN 16.4部を混合した単量体溶液を、滴下装置を用い、一定速度で6時間かけてフラスコ中へ滴下し、その後、80℃で1時間保持した。以降の操作は実施例1と同様にして共重合体A−5を得た。得られた共重合体A−5の各物性を測定した結果を表1に示す。
窒素導入口、攪拌機、コンデンサーおよび温度計を備えたフラスコに、窒素雰囲気下で、PGMEA135.9部を入れ、攪拌しながら湯浴の温度を80℃に上げた。M4 248.4部、ヒドロキシエチルメタクリレート(以下HEMAという)26.0部、GBLMA34.0部、PGMEA252.4部およびAIBN 16.4部を混合した単量体溶液を、滴下装置を用い、一定速度で6時間かけてフラスコ中へ滴下し、その後、80℃で1時間保持した。以降の操作は実施例1と同様にして共重合体B−1を得た。得られた共重合体B−1の各物性を測定した結果を表1に示す。
Claims (4)
- 下記式(1)で表される構成単位と、下記式(3)で表される構成単位とを含有するレジスト用重合体。
- 請求項1または2に記載のレジスト用重合体を含有するレジスト組成物。
- 請求項3記載のレジスト組成物を被加工基板上に塗布する工程と、露光する工程と、現像液を用いて現像してパターンを形成する工程とを有するパターン製造方法。
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JPH11352694A (ja) * | 1998-06-10 | 1999-12-24 | Fujitsu Ltd | レジスト材料及びレジストパターンの形成方法 |
JP2003122007A (ja) * | 2001-10-09 | 2003-04-25 | Fuji Photo Film Co Ltd | ポジ型レジスト組成物 |
JP2003302762A (ja) * | 2002-04-11 | 2003-10-24 | Fuji Photo Film Co Ltd | ポジ型レジスト組成物 |
JP2004138790A (ja) * | 2002-10-17 | 2004-05-13 | Fuji Photo Film Co Ltd | ポジ型レジスト組成物 |
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JP2005105260A (ja) * | 2003-09-12 | 2005-04-21 | Shin Etsu Chem Co Ltd | 高分子化合物、レジスト材料、及びパターン形成方法 |
JP2005133067A (ja) * | 2003-10-08 | 2005-05-26 | Shin Etsu Chem Co Ltd | 高分子化合物及びポジ型レジスト材料並びにこれを用いたパターン形成方法 |
JP2006002121A (ja) * | 2004-06-21 | 2006-01-05 | Shin Etsu Chem Co Ltd | 高分子化合物、レジスト材料及びパターン形成方法 |
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JPH11352694A (ja) * | 1998-06-10 | 1999-12-24 | Fujitsu Ltd | レジスト材料及びレジストパターンの形成方法 |
JP2003122007A (ja) * | 2001-10-09 | 2003-04-25 | Fuji Photo Film Co Ltd | ポジ型レジスト組成物 |
JP2003302762A (ja) * | 2002-04-11 | 2003-10-24 | Fuji Photo Film Co Ltd | ポジ型レジスト組成物 |
JP2004138790A (ja) * | 2002-10-17 | 2004-05-13 | Fuji Photo Film Co Ltd | ポジ型レジスト組成物 |
JP2004176049A (ja) * | 2002-11-05 | 2004-06-24 | Jsr Corp | アクリル系共重合体および感放射線性樹脂組成物 |
JP2005105260A (ja) * | 2003-09-12 | 2005-04-21 | Shin Etsu Chem Co Ltd | 高分子化合物、レジスト材料、及びパターン形成方法 |
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JP2006002121A (ja) * | 2004-06-21 | 2006-01-05 | Shin Etsu Chem Co Ltd | 高分子化合物、レジスト材料及びパターン形成方法 |
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