JP4774996B2 - 感放射線性樹脂組成物 - Google Patents
感放射線性樹脂組成物 Download PDFInfo
- Publication number
- JP4774996B2 JP4774996B2 JP2006007034A JP2006007034A JP4774996B2 JP 4774996 B2 JP4774996 B2 JP 4774996B2 JP 2006007034 A JP2006007034 A JP 2006007034A JP 2006007034 A JP2006007034 A JP 2006007034A JP 4774996 B2 JP4774996 B2 JP 4774996B2
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- Prior art keywords
- group
- acid
- iodonium
- bis
- methyl
- Prior art date
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- 230000005855 radiation Effects 0.000 title claims description 34
- 239000011342 resin composition Substances 0.000 title claims description 27
- -1 1-methyl-1-cyclopentyl group Chemical group 0.000 claims description 264
- 239000002253 acid Substances 0.000 claims description 70
- 239000011347 resin Substances 0.000 claims description 59
- 229920005989 resin Polymers 0.000 claims description 59
- 150000001875 compounds Chemical class 0.000 claims description 27
- 238000009792 diffusion process Methods 0.000 claims description 16
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 14
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 14
- 239000003513 alkali Substances 0.000 claims description 12
- 125000000962 organic group Chemical group 0.000 claims description 12
- 238000010894 electron beam technology Methods 0.000 claims description 9
- 239000012954 diazonium Substances 0.000 claims description 6
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 claims description 6
- FUGYGGDSWSUORM-UHFFFAOYSA-N 4-hydroxystyrene Chemical compound OC1=CC=C(C=C)C=C1 FUGYGGDSWSUORM-UHFFFAOYSA-N 0.000 description 42
- 229920001577 copolymer Polymers 0.000 description 38
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 27
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 23
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 20
- 230000015572 biosynthetic process Effects 0.000 description 17
- YFSUTJLHUFNCNZ-UHFFFAOYSA-N perfluorooctane-1-sulfonic acid Chemical compound OS(=O)(=O)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F YFSUTJLHUFNCNZ-UHFFFAOYSA-N 0.000 description 16
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 15
- 238000006243 chemical reaction Methods 0.000 description 15
- 238000003786 synthesis reaction Methods 0.000 description 15
- IKMBXKGUMLSBOT-UHFFFAOYSA-N 2,3,4,5,6-pentafluorobenzenesulfonic acid Chemical compound OS(=O)(=O)C1=C(F)C(F)=C(F)C(F)=C1F IKMBXKGUMLSBOT-UHFFFAOYSA-N 0.000 description 14
- 239000000203 mixture Substances 0.000 description 14
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- GRFNSWBVXHLTCI-UHFFFAOYSA-N 1-ethenyl-4-[(2-methylpropan-2-yl)oxy]benzene Chemical compound CC(C)(C)OC1=CC=C(C=C)C=C1 GRFNSWBVXHLTCI-UHFFFAOYSA-N 0.000 description 9
- 125000000217 alkyl group Chemical group 0.000 description 9
- 125000003118 aryl group Chemical group 0.000 description 9
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- 125000004122 cyclic group Chemical group 0.000 description 9
- KZNICNPSHKQLFF-UHFFFAOYSA-N succinimide Chemical compound O=C1CCC(=O)N1 KZNICNPSHKQLFF-UHFFFAOYSA-N 0.000 description 9
- ARXJGSRGQADJSQ-UHFFFAOYSA-N 1-methoxypropan-2-ol Chemical compound COCC(C)O ARXJGSRGQADJSQ-UHFFFAOYSA-N 0.000 description 8
- 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 8
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 8
- 238000005227 gel permeation chromatography Methods 0.000 description 8
- DNIAPMSPPWPWGF-UHFFFAOYSA-N monopropylene glycol Natural products CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 8
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 8
- 238000006116 polymerization reaction Methods 0.000 description 8
- 239000004094 surface-active agent Substances 0.000 description 8
- 125000000524 functional group Chemical group 0.000 description 7
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 6
- 238000004458 analytical method Methods 0.000 description 6
- 125000004432 carbon atom Chemical group C* 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- MFNBODQBPMDPPQ-UHFFFAOYSA-N (4-tert-butylphenyl)-diphenylsulfanium Chemical compound C1=CC(C(C)(C)C)=CC=C1[S+](C=1C=CC=CC=1)C1=CC=CC=C1 MFNBODQBPMDPPQ-UHFFFAOYSA-N 0.000 description 5
- 238000001644 13C nuclear magnetic resonance spectroscopy Methods 0.000 description 5
- 239000004305 biphenyl Substances 0.000 description 5
- 235000010290 biphenyl Nutrition 0.000 description 5
- 238000011161 development Methods 0.000 description 5
- 230000018109 developmental process Effects 0.000 description 5
- 238000005530 etching Methods 0.000 description 5
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N phenylbenzene Natural products C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 description 5
- 239000000758 substrate Substances 0.000 description 5
- 229960002317 succinimide Drugs 0.000 description 5
- FDOANYJWOYTZAP-UHFFFAOYSA-N (1-ethylcyclopentyl) prop-2-enoate Chemical compound C=CC(=O)OC1(CC)CCCC1 FDOANYJWOYTZAP-UHFFFAOYSA-N 0.000 description 4
- JAMNSIXSLVPNLC-UHFFFAOYSA-N (4-ethenylphenyl) acetate Chemical compound CC(=O)OC1=CC=C(C=C)C=C1 JAMNSIXSLVPNLC-UHFFFAOYSA-N 0.000 description 4
- ATHHXGZTWNVVOU-UHFFFAOYSA-N N-methylformamide Chemical compound CNC=O ATHHXGZTWNVVOU-UHFFFAOYSA-N 0.000 description 4
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 230000002378 acidificating effect Effects 0.000 description 4
- GODFYZWCHRHWMQ-UHFFFAOYSA-N bis(3,4-dimethylphenyl)iodanium Chemical compound C1=C(C)C(C)=CC=C1[I+]C1=CC=C(C)C(C)=C1 GODFYZWCHRHWMQ-UHFFFAOYSA-N 0.000 description 4
- 238000009835 boiling Methods 0.000 description 4
- DKPFZGUDAPQIHT-UHFFFAOYSA-N butyl acetate Chemical compound CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 4
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 4
- 238000007334 copolymerization reaction Methods 0.000 description 4
- UBBLLAWOTYUCQO-UHFFFAOYSA-N dinaphthalen-1-yliodanium Chemical compound C1=CC=C2C([I+]C=3C4=CC=CC=C4C=CC=3)=CC=CC2=C1 UBBLLAWOTYUCQO-UHFFFAOYSA-N 0.000 description 4
- 238000004090 dissolution Methods 0.000 description 4
- LZCLXQDLBQLTDK-UHFFFAOYSA-N ethyl 2-hydroxypropanoate Chemical compound CCOC(=O)C(C)O LZCLXQDLBQLTDK-UHFFFAOYSA-N 0.000 description 4
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000006460 hydrolysis reaction Methods 0.000 description 4
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 4
- 239000012299 nitrogen atmosphere Substances 0.000 description 4
- 125000004433 nitrogen atom Chemical group N* 0.000 description 4
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 4
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 238000010992 reflux Methods 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- ISXSCDLOGDJUNJ-UHFFFAOYSA-N tert-butyl prop-2-enoate Chemical compound CC(C)(C)OC(=O)C=C ISXSCDLOGDJUNJ-UHFFFAOYSA-N 0.000 description 4
- 125000005951 trifluoromethanesulfonyloxy group Chemical group 0.000 description 4
- YRPLSAWATHBYFB-UHFFFAOYSA-N (2-methyl-2-adamantyl) prop-2-enoate Chemical compound C1C(C2)CC3CC1C(C)(OC(=O)C=C)C2C3 YRPLSAWATHBYFB-UHFFFAOYSA-N 0.000 description 3
- RCBARGVNZTUGHE-UHFFFAOYSA-O (4-hydroxyphenyl)-diphenylsulfanium Chemical compound C1=CC(O)=CC=C1[S+](C=1C=CC=CC=1)C1=CC=CC=C1 RCBARGVNZTUGHE-UHFFFAOYSA-O 0.000 description 3
- ADOBQGXDCURFNZ-UHFFFAOYSA-N (4-hydroxyphenyl)-diphenylsulfanium;trifluoromethanesulfonate Chemical compound [O-]S(=O)(=O)C(F)(F)F.C1=CC(O)=CC=C1[S+](C=1C=CC=CC=1)C1=CC=CC=C1 ADOBQGXDCURFNZ-UHFFFAOYSA-N 0.000 description 3
- JZDQKBZKFIWSNW-UHFFFAOYSA-N (4-methoxyphenyl)-phenyliodanium Chemical compound C1=CC(OC)=CC=C1[I+]C1=CC=CC=C1 JZDQKBZKFIWSNW-UHFFFAOYSA-N 0.000 description 3
- NLHPINMBHCCFBV-UHFFFAOYSA-N (4-nitrophenyl)-phenyliodanium Chemical compound C1=CC([N+](=O)[O-])=CC=C1[I+]C1=CC=CC=C1 NLHPINMBHCCFBV-UHFFFAOYSA-N 0.000 description 3
- YAJYJWXEWKRTPO-UHFFFAOYSA-N 2,3,3,4,4,5-hexamethylhexane-2-thiol Chemical compound CC(C)C(C)(C)C(C)(C)C(C)(C)S YAJYJWXEWKRTPO-UHFFFAOYSA-N 0.000 description 3
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
- JFUOAGBSDGCVES-UHFFFAOYSA-N 3-but-2-enyl-4-methylpyrrolidine-2,5-dione Chemical compound CC=CCC1C(C)C(=O)NC1=O JFUOAGBSDGCVES-UHFFFAOYSA-N 0.000 description 3
- GPIUUMROPXDNRH-UHFFFAOYSA-N 3647-74-3 Chemical compound C1C2C3C(=O)NC(=O)C3C1C=C2 GPIUUMROPXDNRH-UHFFFAOYSA-N 0.000 description 3
- 125000004172 4-methoxyphenyl group Chemical group [H]C1=C([H])C(OC([H])([H])[H])=C([H])C([H])=C1* 0.000 description 3
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 3
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- YXHKONLOYHBTNS-UHFFFAOYSA-N Diazomethane Chemical compound C=[N+]=[N-] YXHKONLOYHBTNS-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
- RWRDLPDLKQPQOW-UHFFFAOYSA-N Pyrrolidine Chemical compound C1CCNC1 RWRDLPDLKQPQOW-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 239000007983 Tris buffer Substances 0.000 description 3
- 125000002252 acyl group Chemical group 0.000 description 3
- 125000004453 alkoxycarbonyl group Chemical group 0.000 description 3
- 235000011114 ammonium hydroxide Nutrition 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 3
- 125000003710 aryl alkyl group Chemical group 0.000 description 3
- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 description 3
- MWPUSWNISCYUNR-UHFFFAOYSA-N bis(3-nitrophenyl)iodanium Chemical compound [O-][N+](=O)C1=CC=CC([I+]C=2C=C(C=CC=2)[N+]([O-])=O)=C1 MWPUSWNISCYUNR-UHFFFAOYSA-N 0.000 description 3
- QRMFGEKERJAYSQ-UHFFFAOYSA-N bis(4-chlorophenyl)iodanium Chemical compound C1=CC(Cl)=CC=C1[I+]C1=CC=C(Cl)C=C1 QRMFGEKERJAYSQ-UHFFFAOYSA-N 0.000 description 3
- BSWOZQQUINLBTG-UHFFFAOYSA-N bis(4-methoxyphenyl)-(4-methylphenyl)sulfanium Chemical compound C1=CC(OC)=CC=C1[S+](C=1C=CC(OC)=CC=1)C1=CC=C(C)C=C1 BSWOZQQUINLBTG-UHFFFAOYSA-N 0.000 description 3
- DNFSNYQTQMVTOK-UHFFFAOYSA-N bis(4-tert-butylphenyl)iodanium Chemical compound C1=CC(C(C)(C)C)=CC=C1[I+]C1=CC=C(C(C)(C)C)C=C1 DNFSNYQTQMVTOK-UHFFFAOYSA-N 0.000 description 3
- DBAVIPITSXUODT-UHFFFAOYSA-N bis[4-(trifluoromethyl)phenyl]iodanium Chemical compound C1=CC(C(F)(F)F)=CC=C1[I+]C1=CC=C(C(F)(F)F)C=C1 DBAVIPITSXUODT-UHFFFAOYSA-N 0.000 description 3
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- 229910052799 carbon Inorganic materials 0.000 description 3
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- 238000000576 coating method Methods 0.000 description 3
- 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 3
- CTWXRPQORLZRLG-UHFFFAOYSA-M diphenyl-(2,4,6-trimethylphenyl)sulfanium;4-(trifluoromethyl)benzenesulfonate Chemical compound [O-]S(=O)(=O)C1=CC=C(C(F)(F)F)C=C1.CC1=CC(C)=CC(C)=C1[S+](C=1C=CC=CC=1)C1=CC=CC=C1 CTWXRPQORLZRLG-UHFFFAOYSA-M 0.000 description 3
- SBQIJPBUMNWUKN-UHFFFAOYSA-M diphenyliodanium;trifluoromethanesulfonate Chemical compound [O-]S(=O)(=O)C(F)(F)F.C=1C=CC=CC=1[I+]C1=CC=CC=C1 SBQIJPBUMNWUKN-UHFFFAOYSA-M 0.000 description 3
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- 229910052757 nitrogen Inorganic materials 0.000 description 3
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 3
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- 125000002914 sec-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 3
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- XFJSTBHMLYKHJF-UHFFFAOYSA-N (2,5-dioxopyrrolidin-1-yl) 4-methylbenzenesulfonate Chemical compound C1=CC(C)=CC=C1S(=O)(=O)ON1C(=O)CCC1=O XFJSTBHMLYKHJF-UHFFFAOYSA-N 0.000 description 2
- GWEHVDNNLFDJLR-UHFFFAOYSA-N 1,3-diphenylurea Chemical compound C=1C=CC=CC=1NC(=O)NC1=CC=CC=C1 GWEHVDNNLFDJLR-UHFFFAOYSA-N 0.000 description 2
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- 125000001637 1-naphthyl group Chemical group [H]C1=C([H])C([H])=C2C(*)=C([H])C([H])=C([H])C2=C1[H] 0.000 description 2
- RUFPHBVGCFYCNW-UHFFFAOYSA-N 1-naphthylamine Chemical compound C1=CC=C2C(N)=CC=CC2=C1 RUFPHBVGCFYCNW-UHFFFAOYSA-N 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
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- ICGLPKIVTVWCFT-UHFFFAOYSA-N 4-methylbenzenesulfonohydrazide Chemical compound CC1=CC=C(S(=O)(=O)NN)C=C1 ICGLPKIVTVWCFT-UHFFFAOYSA-N 0.000 description 2
- XLSZMDLNRCVEIJ-UHFFFAOYSA-N 4-methylimidazole Chemical compound CC1=CNC=N1 XLSZMDLNRCVEIJ-UHFFFAOYSA-N 0.000 description 2
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- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 2
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- 125000000346 malonyl group Chemical group C(CC(=O)*)(=O)* 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 125000005395 methacrylic acid group Chemical group 0.000 description 1
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 description 1
- 125000001160 methoxycarbonyl group Chemical group [H]C([H])([H])OC(*)=O 0.000 description 1
- 125000004184 methoxymethyl group Chemical group [H]C([H])([H])OC([H])([H])* 0.000 description 1
- YSGBMDFJWFIEDF-UHFFFAOYSA-N methyl 2-hydroxy-3-methylbutanoate Chemical compound COC(=O)C(O)C(C)C YSGBMDFJWFIEDF-UHFFFAOYSA-N 0.000 description 1
- HSDFKDZBJMDHFF-UHFFFAOYSA-N methyl 3-ethoxypropanoate Chemical compound CCOCCC(=O)OC HSDFKDZBJMDHFF-UHFFFAOYSA-N 0.000 description 1
- BDJSOPWXYLFTNW-UHFFFAOYSA-N methyl 3-methoxypropanoate Chemical compound COCCC(=O)OC BDJSOPWXYLFTNW-UHFFFAOYSA-N 0.000 description 1
- 229940057867 methyl lactate Drugs 0.000 description 1
- WBYWAXJHAXSJNI-UHFFFAOYSA-N methyl p-hydroxycinnamate Natural products OC(=O)C=CC1=CC=CC=C1 WBYWAXJHAXSJNI-UHFFFAOYSA-N 0.000 description 1
- CWKLZLBVOJRSOM-UHFFFAOYSA-N methyl pyruvate Chemical compound COC(=O)C(C)=O CWKLZLBVOJRSOM-UHFFFAOYSA-N 0.000 description 1
- 125000004092 methylthiomethyl group Chemical group [H]C([H])([H])SC([H])([H])* 0.000 description 1
- XGEGHDBEHXKFPX-NJFSPNSNSA-N methylurea Chemical compound [14CH3]NC(N)=O XGEGHDBEHXKFPX-NJFSPNSNSA-N 0.000 description 1
- IQTRBJRORQFYLN-UHFFFAOYSA-N molport-019-739-976 Chemical compound C1=CC(C)=CC=C1S(=O)(=O)ON1C(=O)C2C(C=C3)CC3C2C1=O IQTRBJRORQFYLN-UHFFFAOYSA-N 0.000 description 1
- 125000001419 myristoyl group Chemical group O=C([*])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])C([H])([H])[H] 0.000 description 1
- HEPOEAALKWFVLE-UHFFFAOYSA-N n -((perfluorooctanesulfonyl)oxy)-5-norbornene-2,3-dicarboximide Chemical compound C1=CC2CC1C1C2C(=O)N(OS(=O)(=O)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F)C1=O HEPOEAALKWFVLE-UHFFFAOYSA-N 0.000 description 1
- YCMDNBGUNDHOOD-UHFFFAOYSA-N n -((trifluoromethylsulfonyl)oxy)-5-norbornene-2,3-dicarboximide Chemical compound C1=CC2CC1C1C2C(=O)N(OS(=O)(=O)C(F)(F)F)C1=O YCMDNBGUNDHOOD-UHFFFAOYSA-N 0.000 description 1
- VWSUQBGPNFFSLB-UHFFFAOYSA-N n'-(benzenesulfonyl)benzenesulfonohydrazide Chemical compound C=1C=CC=CC=1S(=O)(=O)NNS(=O)(=O)C1=CC=CC=C1 VWSUQBGPNFFSLB-UHFFFAOYSA-N 0.000 description 1
- ZQJAONQEOXOVNR-UHFFFAOYSA-N n,n-di(nonyl)nonan-1-amine Chemical compound CCCCCCCCCN(CCCCCCCCC)CCCCCCCCC ZQJAONQEOXOVNR-UHFFFAOYSA-N 0.000 description 1
- CLZGJKHEVKJLLS-UHFFFAOYSA-N n,n-diheptylheptan-1-amine Chemical compound CCCCCCCN(CCCCCCC)CCCCCCC CLZGJKHEVKJLLS-UHFFFAOYSA-N 0.000 description 1
- DIAIBWNEUYXDNL-UHFFFAOYSA-N n,n-dihexylhexan-1-amine Chemical compound CCCCCCN(CCCCCC)CCCCCC DIAIBWNEUYXDNL-UHFFFAOYSA-N 0.000 description 1
- OOHAUGDGCWURIT-UHFFFAOYSA-N n,n-dipentylpentan-1-amine Chemical compound CCCCCN(CCCCC)CCCCC OOHAUGDGCWURIT-UHFFFAOYSA-N 0.000 description 1
- 125000006606 n-butoxy group Chemical group 0.000 description 1
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- GMTCPFCMAHMEMT-UHFFFAOYSA-N n-decyldecan-1-amine Chemical compound CCCCCCCCCCNCCCCCCCCCC GMTCPFCMAHMEMT-UHFFFAOYSA-N 0.000 description 1
- RCLLINSDAJVOHP-UHFFFAOYSA-N n-ethyl-n',n'-dimethylprop-2-enehydrazide Chemical compound CCN(N(C)C)C(=O)C=C RCLLINSDAJVOHP-UHFFFAOYSA-N 0.000 description 1
- NJWMENBYMFZACG-UHFFFAOYSA-N n-heptylheptan-1-amine Chemical compound CCCCCCCNCCCCCCC NJWMENBYMFZACG-UHFFFAOYSA-N 0.000 description 1
- PXSXRABJBXYMFT-UHFFFAOYSA-N n-hexylhexan-1-amine Chemical compound CCCCCCNCCCCCC PXSXRABJBXYMFT-UHFFFAOYSA-N 0.000 description 1
- MFHKEJIIHDNPQE-UHFFFAOYSA-N n-nonylnonan-1-amine Chemical compound CCCCCCCCCNCCCCCCCCC MFHKEJIIHDNPQE-UHFFFAOYSA-N 0.000 description 1
- 125000000740 n-pentyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000003506 n-propoxy group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])O* 0.000 description 1
- LABYRQOOPPZWDG-UHFFFAOYSA-M naphthalene-1-sulfonate;triphenylsulfanium Chemical compound C1=CC=C2C(S(=O)(=O)[O-])=CC=CC2=C1.C1=CC=CC=C1[S+](C=1C=CC=CC=1)C1=CC=CC=C1 LABYRQOOPPZWDG-UHFFFAOYSA-M 0.000 description 1
- 125000001038 naphthoyl group Chemical group C1(=CC=CC2=CC=CC=C12)C(=O)* 0.000 description 1
- 125000001971 neopentyl group Chemical group [H]C([*])([H])C(C([H])([H])[H])(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 229960002715 nicotine Drugs 0.000 description 1
- SNICXCGAKADSCV-UHFFFAOYSA-N nicotine Natural products CN1CCCC1C1=CC=CN=C1 SNICXCGAKADSCV-UHFFFAOYSA-N 0.000 description 1
- 235000001968 nicotinic acid Nutrition 0.000 description 1
- 239000011664 nicotinic acid Substances 0.000 description 1
- 229960003512 nicotinic acid Drugs 0.000 description 1
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 description 1
- 125000006502 nitrobenzyl group Chemical group 0.000 description 1
- FJDUDHYHRVPMJZ-UHFFFAOYSA-N nonan-1-amine Chemical compound CCCCCCCCCN FJDUDHYHRVPMJZ-UHFFFAOYSA-N 0.000 description 1
- 229920003986 novolac Polymers 0.000 description 1
- SFBTTWXNCQVIEC-UHFFFAOYSA-N o-Vinylanisole Chemical compound COC1=CC=CC=C1C=C SFBTTWXNCQVIEC-UHFFFAOYSA-N 0.000 description 1
- 125000003261 o-tolyl group Chemical group [H]C1=C([H])C(*)=C(C([H])=C1[H])C([H])([H])[H] 0.000 description 1
- IOQPZZOEVPZRBK-UHFFFAOYSA-N octan-1-amine Chemical compound CCCCCCCCN IOQPZZOEVPZRBK-UHFFFAOYSA-N 0.000 description 1
- AUBNVERMHFAAKM-UHFFFAOYSA-M octane-1-sulfonate;triphenylsulfanium Chemical compound CCCCCCCCS([O-])(=O)=O.C1=CC=CC=C1[S+](C=1C=CC=CC=1)C1=CC=CC=C1 AUBNVERMHFAAKM-UHFFFAOYSA-M 0.000 description 1
- APUFRTKFJSHTBQ-UHFFFAOYSA-M octane-1-sulfonate;tris(4-methoxyphenyl)sulfanium Chemical compound CCCCCCCCS([O-])(=O)=O.C1=CC(OC)=CC=C1[S+](C=1C=CC(OC)=CC=1)C1=CC=C(OC)C=C1 APUFRTKFJSHTBQ-UHFFFAOYSA-M 0.000 description 1
- RQKCPNNHQBFTTR-UHFFFAOYSA-N octane-1-sulfonic acid hydroiodide Chemical compound CCCCCCCCS(O)(=O)=O.I RQKCPNNHQBFTTR-UHFFFAOYSA-N 0.000 description 1
- 125000002811 oleoyl group Chemical group O=C([*])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])/C([H])=C([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])[H] 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 125000003452 oxalyl group Chemical group *C(=O)C(*)=O 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 125000003854 p-chlorophenyl group Chemical group [H]C1=C([H])C(*)=C([H])C([H])=C1Cl 0.000 description 1
- 125000000636 p-nitrophenyl group Chemical group [H]C1=C([H])C(=C([H])C([H])=C1*)[N+]([O-])=O 0.000 description 1
- 125000001037 p-tolyl group Chemical group [H]C1=C([H])C(=C([H])C([H])=C1*)C([H])([H])[H] 0.000 description 1
- 125000001312 palmitoyl group Chemical group O=C([*])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])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
- 125000006340 pentafluoro ethyl group Chemical group FC(F)(F)C(F)(F)* 0.000 description 1
- 229940100684 pentylamine Drugs 0.000 description 1
- 125000000612 phthaloyl group Chemical group C(C=1C(C(=O)*)=CC=CC1)(=O)* 0.000 description 1
- 125000004591 piperonyl group Chemical group C(C1=CC=2OCOC2C=C1)* 0.000 description 1
- 229920000083 poly(allylamine) Polymers 0.000 description 1
- 229920000259 polyoxyethylene lauryl ether Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- CENQGEGPYPBQSG-UHFFFAOYSA-N propane-1-sulfonohydrazide Chemical compound CCCS(=O)(=O)NN CENQGEGPYPBQSG-UHFFFAOYSA-N 0.000 description 1
- QLNJFJADRCOGBJ-UHFFFAOYSA-N propionamide Chemical compound CCC(N)=O QLNJFJADRCOGBJ-UHFFFAOYSA-N 0.000 description 1
- 229940080818 propionamide Drugs 0.000 description 1
- 125000001501 propionyl group Chemical group O=C([*])C([H])([H])C([H])([H])[H] 0.000 description 1
- ILVGAIQLOCKNQA-UHFFFAOYSA-N propyl 2-hydroxypropanoate Chemical compound CCCOC(=O)C(C)O ILVGAIQLOCKNQA-UHFFFAOYSA-N 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- CLERGDGGVLATDT-UHFFFAOYSA-M pyrene-1-sulfonate;triphenylsulfanium Chemical compound C1=CC=CC=C1[S+](C=1C=CC=CC=1)C1=CC=CC=C1.C1=C2C(S(=O)(=O)[O-])=CC=C(C=C3)C2=C2C3=CC=CC2=C1 CLERGDGGVLATDT-UHFFFAOYSA-M 0.000 description 1
- PBMFSQRYOILNGV-UHFFFAOYSA-N pyridazine Chemical compound C1=CC=NN=C1 PBMFSQRYOILNGV-UHFFFAOYSA-N 0.000 description 1
- 150000003222 pyridines Chemical class 0.000 description 1
- ZDYVRSLAEXCVBX-UHFFFAOYSA-N pyridinium p-toluenesulfonate Chemical compound C1=CC=[NH+]C=C1.CC1=CC=C(S([O-])(=O)=O)C=C1 ZDYVRSLAEXCVBX-UHFFFAOYSA-N 0.000 description 1
- HNJBEVLQSNELDL-UHFFFAOYSA-N pyrrolidin-2-one Chemical compound O=C1CCCN1 HNJBEVLQSNELDL-UHFFFAOYSA-N 0.000 description 1
- MCJGNVYPOGVAJF-UHFFFAOYSA-N quinolin-8-ol Chemical compound C1=CN=C2C(O)=CC=CC2=C1 MCJGNVYPOGVAJF-UHFFFAOYSA-N 0.000 description 1
- 230000007261 regionalization Effects 0.000 description 1
- 229930187593 rose bengal Natural products 0.000 description 1
- 125000003548 sec-pentyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 125000003808 silyl group Chemical group [H][Si]([H])([H])[*] 0.000 description 1
- DVQHRBFGRZHMSR-UHFFFAOYSA-N sodium methyl 2,2-dimethyl-4,6-dioxo-5-(N-prop-2-enoxy-C-propylcarbonimidoyl)cyclohexane-1-carboxylate Chemical compound [Na+].C=CCON=C(CCC)[C-]1C(=O)CC(C)(C)C(C(=O)OC)C1=O DVQHRBFGRZHMSR-UHFFFAOYSA-N 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000004528 spin coating Methods 0.000 description 1
- 125000003696 stearoyl group Chemical group O=C([*])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])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 150000003431 steroids Chemical class 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 125000002730 succinyl group Chemical group C(CCC(=O)*)(=O)* 0.000 description 1
- PWNDBUVPQHZOSA-UHFFFAOYSA-N sulfane 2-(trifluoromethyl)benzenesulfonic acid Chemical compound [SH3+].[O-]S(=O)(=O)c1ccccc1C(F)(F)F PWNDBUVPQHZOSA-UHFFFAOYSA-N 0.000 description 1
- KJDFYCNLWYJIRL-UHFFFAOYSA-N sulfanium pyrene-1-sulfonate Chemical compound [SH3+].[O-]S(=O)(=O)c1ccc2ccc3cccc4ccc1c2c34 KJDFYCNLWYJIRL-UHFFFAOYSA-N 0.000 description 1
- LZOZLBFZGFLFBV-UHFFFAOYSA-N sulfene Chemical class C=S(=O)=O LZOZLBFZGFLFBV-UHFFFAOYSA-N 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 1
- 125000000472 sulfonyl group Chemical group *S(*)(=O)=O 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- NZNVBGIQMWGYRR-UHFFFAOYSA-N tert-butyl 2-phenylbenzimidazole-1-carboxylate Chemical compound N=1C2=CC=CC=C2N(C(=O)OC(C)(C)C)C=1C1=CC=CC=C1 NZNVBGIQMWGYRR-UHFFFAOYSA-N 0.000 description 1
- CROWJIMGVQLMPG-UHFFFAOYSA-N tert-butyl benzimidazole-1-carboxylate Chemical compound C1=CC=C2N(C(=O)OC(C)(C)C)C=NC2=C1 CROWJIMGVQLMPG-UHFFFAOYSA-N 0.000 description 1
- MTBKGWHHOBJMHJ-UHFFFAOYSA-N tert-butyl imidazole-1-carboxylate Chemical compound CC(C)(C)OC(=O)N1C=CN=C1 MTBKGWHHOBJMHJ-UHFFFAOYSA-N 0.000 description 1
- KMUNFRBJXIEULW-UHFFFAOYSA-N tert-butyl n,n-bis(2-hydroxyethyl)carbamate Chemical compound CC(C)(C)OC(=O)N(CCO)CCO KMUNFRBJXIEULW-UHFFFAOYSA-N 0.000 description 1
- WIURVMHVEPTKHB-UHFFFAOYSA-N tert-butyl n,n-dicyclohexylcarbamate Chemical compound C1CCCCC1N(C(=O)OC(C)(C)C)C1CCCCC1 WIURVMHVEPTKHB-UHFFFAOYSA-N 0.000 description 1
- UQEXYHWLLMPVRB-UHFFFAOYSA-N tert-butyl n,n-dioctylcarbamate Chemical compound CCCCCCCCN(C(=O)OC(C)(C)C)CCCCCCCC UQEXYHWLLMPVRB-UHFFFAOYSA-N 0.000 description 1
- QJONCGVUGJUWJQ-UHFFFAOYSA-N tert-butyl n,n-diphenylcarbamate Chemical compound C=1C=CC=CC=1N(C(=O)OC(C)(C)C)C1=CC=CC=C1 QJONCGVUGJUWJQ-UHFFFAOYSA-N 0.000 description 1
- RQCNHUCCQJMSRG-UHFFFAOYSA-N tert-butyl piperidine-1-carboxylate Chemical compound CC(C)(C)OC(=O)N1CCCCC1 RQCNHUCCQJMSRG-UHFFFAOYSA-N 0.000 description 1
- 125000001973 tert-pentyl group Chemical group [H]C([H])([H])C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- 125000003718 tetrahydrofuranyl group Chemical group 0.000 description 1
- 125000001412 tetrahydropyranyl group Chemical group 0.000 description 1
- 125000004632 tetrahydrothiopyranyl group Chemical group S1C(CCCC1)* 0.000 description 1
- 125000005425 toluyl group Chemical group 0.000 description 1
- LDHQCZJRKDOVOX-UHFFFAOYSA-N trans-crotonic acid Natural products CC=CC(O)=O LDHQCZJRKDOVOX-UHFFFAOYSA-N 0.000 description 1
- IMFACGCPASFAPR-UHFFFAOYSA-N tributylamine Chemical compound CCCCN(CCCC)CCCC IMFACGCPASFAPR-UHFFFAOYSA-N 0.000 description 1
- IMNIMPAHZVJRPE-UHFFFAOYSA-N triethylenediamine Chemical compound C1CN2CCN1CC2 IMNIMPAHZVJRPE-UHFFFAOYSA-N 0.000 description 1
- IZBIRHQNPWSIET-UHFFFAOYSA-M trifluoromethanesulfonate;tris(4-fluorophenyl)sulfanium Chemical compound [O-]S(=O)(=O)C(F)(F)F.C1=CC(F)=CC=C1[S+](C=1C=CC(F)=CC=1)C1=CC=C(F)C=C1 IZBIRHQNPWSIET-UHFFFAOYSA-M 0.000 description 1
- OXWFVYDECNDRMT-UHFFFAOYSA-M trifluoromethanesulfonate;tris(4-methoxyphenyl)sulfanium Chemical compound [O-]S(=O)(=O)C(F)(F)F.C1=CC(OC)=CC=C1[S+](C=1C=CC(OC)=CC=1)C1=CC=C(OC)C=C1 OXWFVYDECNDRMT-UHFFFAOYSA-M 0.000 description 1
- PNHHQYMSCWPFFW-UHFFFAOYSA-N trifluoromethanesulfonohydrazide Chemical compound NNS(=O)(=O)C(F)(F)F PNHHQYMSCWPFFW-UHFFFAOYSA-N 0.000 description 1
- 125000002023 trifluoromethyl group Chemical group FC(F)(F)* 0.000 description 1
- 125000001889 triflyl group Chemical group FC(F)(F)S(*)(=O)=O 0.000 description 1
- 125000000026 trimethylsilyl group Chemical group [H]C([H])([H])[Si]([*])(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- ODHXBMXNKOYIBV-UHFFFAOYSA-N triphenylamine Chemical compound C1=CC=CC=C1N(C=1C=CC=CC=1)C1=CC=CC=C1 ODHXBMXNKOYIBV-UHFFFAOYSA-N 0.000 description 1
- YFTHZRPMJXBUME-UHFFFAOYSA-N tripropylamine Chemical compound CCCN(CCC)CCC YFTHZRPMJXBUME-UHFFFAOYSA-N 0.000 description 1
- MAOCPIDAEMTJLK-UHFFFAOYSA-N tris(4-fluorophenyl)sulfanium Chemical compound C1=CC(F)=CC=C1[S+](C=1C=CC(F)=CC=1)C1=CC=C(F)C=C1 MAOCPIDAEMTJLK-UHFFFAOYSA-N 0.000 description 1
- 125000002221 trityl group Chemical group [H]C1=C([H])C([H])=C([H])C([H])=C1C([*])(C1=C(C(=C(C(=C1[H])[H])[H])[H])[H])C1=C([H])C([H])=C([H])C([H])=C1[H] 0.000 description 1
- 125000003774 valeryl group Chemical group O=C([*])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
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- 239000008096 xylene Substances 0.000 description 1
- 125000005023 xylyl group Chemical group 0.000 description 1
Landscapes
- Materials For Photolithography (AREA)
Description
(1)PMMA(ポリメチルメタクリレート)等のメタクリル系主鎖切断型感放射線性樹脂組成物:
解像度には優れるが、エッチング耐性、感度に問題があり実用化は困難である。解像度と感度のバランスに優れるポリt−ブチルα−クロロメチルスチレン(特許文献1参照)、樹脂末端に電子線により切断され易い原子(N、O、S)を導入した特許出願(特許文献2参照)がされている。しかし感度の改良は認められるが感度、エッチング耐性共実用レベルには至っていない。
(2)酸解離性官能基で部分的に保護されたポリヒドロキシスチレン系樹脂(KrFエキシマ用樹脂)およびノボラック(i線用樹脂)と酸発生剤を有する化学増幅型感放射線性樹脂組成物:
感度、解像度、エッチング耐性のバランスに優れ、部分アセタール保護ポリヒドロキシスチレン樹脂+酸発生剤(特許文献3参照)、各種酸解離性部分保護ポリヒドロキシスチレン樹脂+フッ素含有芳香族スルホン酸発生オニウム塩+フッ素系またはシリコン系界面活性剤(特許文献4参照)、カチオン部の置換基として少なくとも1つの電子吸引基(F、シアノ基、ニトロ基)を有するオニウム塩(特許文献5参照)、ジスルホニル基を有する樹脂(特許文献6参照)、N−オキシイミドスルホニル基を有する樹脂(特許文献7参照)等各種特許が出願されている。しかし、微細なパターン形成時の膜面荒れ(以下ラフネスと記す)、感度、解像度で実用レベルには至っていない。
特に、KrFエキシマレーザーを用いてパターニングする場合、酸解離性基含有樹脂100重量部に対して、酸発生剤が約20重量部をこえると、感度は向上するがパターン形状が低下したり、エッジラフネスが悪化したりするなどの問題がある。
また、本発明のさらなる目的は、電子線または極紫外線に有効に感応するEB、X線、EUV用として好適な化学増幅型ポジ型の感放射線性樹脂組成物を提供することにある。
また、上記酸発生剤(A)がスルホニルオキシイミド化合物、スルホニウム塩化合物、ヨードニウム塩化合物、およびジアゾニウム塩化合物より選ばれる少なくとも1つの化合物であることを特徴とする。
また、上記酸解離性基含有樹脂(B)は下記式(1)で表される繰り返し単位および下記式(3)で表される繰り返し単位を含むことを特徴とする。
酸発生剤(A)
EB、EUVの照射により酸を発生する酸発生剤(A)としては、スルホニルオキシイミド化合物、スルホニウム塩化合物およびヨードニウム塩化合物等のオニウム塩化合物、スルホン化合物、スルホン酸エステル化合物、ジアゾニウム塩化合物、ジスルホニルメタン化合物、オキシムスルホネート化合物、ヒドラジンスルホネート化合物等を挙げることができる。
これらの中で、スルホニルオキシイミド化合物、スルホニウム塩化合物、ヨードニウム塩化合物、およびジアゾニウム塩化合物より選ばれる少なくとも1つの化合物であることがEB、X線、EUV用として、ラインラフネス特性を向上させるので好ましい。
これらのうちで、ビス(1,4−ジオキサスピロ[4.5]デカン−7−スルホニル)ジアゾメタンがラインラフネス特性をより向上させるので好ましい。
ジスルホニルメタン化合物としては、例えば、下記式(6)で表される化合物を挙げることができる。
これらの他の酸発生剤は、単独でまたは2種以上を混合して使用することができる。
本発明における(B)成分は、酸解離性基を有するアルカリ不溶性またはアルカリ難溶性の樹脂であって、該酸解離性基が解離することによりアルカリ易溶性となる樹脂からなる。
ここで言う「アルカリ不溶性またはアルカリ難溶性」とは、酸解離性基含有樹脂(B)を含有する感放射線性樹脂組成物を用いて形成されるレジスト被膜からレジストパターンを形成する際に採用されるアルカリ現像条件下で、当該レジスト被膜の代わりに酸解離性基含有樹脂(B)のみを用いた被膜を現像した場合に、当該被膜の初期膜厚の50%以上が現像後に残存する性質を意味する。
本発明において、好ましい酸解離性基含有樹脂(B)としては、例えば、下記式(1)で表される繰り返し単位(以下、「繰り返し単位(1)」という)と、下記式(2)で表される繰り返し単位(以下、「繰り返し単位(2)」という)および/または下記式(3)で表される繰り返し単位(以下、「繰り返し単位(3)」という)とを含む樹脂を挙げることできる。
式(2)において、R3は水素原子またはメチル基を表し、R4は1価の有機基(但し、−OR5に相当する基を除く)を表し、R5は1価の酸解離性基を表し、qは0〜3の整数であり、pは1〜3の整数であり、複数存在するR4およびR5はそれぞれ相互に同一でも異なってもよい。
式(3)において、R6は水素原子またはメチル基を表し、R7はt−ブチル基、1−メチルシクロペンチル基または1−エチルシクロペンチル基、2−メチル−2−アダマンチル基、2−エチル−2−アダマンチル基を表す。
上記アルキル基としては、例えば、メチル基、エチル基、n−プロピル基、i−プロピル基、n−ブチル基、2−メチルプロピル基、1−メチルプロピル基、t−ブチル基、シクロペンチル基、シクロヘキシル基等を挙げることができる。
上記1価の芳香族炭化水素基としては、例えば、フェニル基、o−トリル基、m−トリル基、p−トリル基、2,4−キシリル基、2,6−キシリル基、3,5−キシリル基、メシチル基、o−クメニル基、m−クメニル基、p−クメニル基、ベンジル基、フェネチル基、1−ナフチル基、2−ナフチル基等を挙げることができる。
上記置換メチル基としては、例えば、メトキシメチル基、メチルチオメチル基、エトキシメチル基、エチルチオメチル基、メトキシエトキシメチル基、ベンジルオキシメチル基、ベンジルチオメチル基、フェナシル基、ブロモフェナシル基、メトキシフェナシル基、メチルチオフェナシル基、α−メチルフェナシル基、シクロプロピルメチル基、ベンジル基、ジフェニルメチル基、トリフェニルメチル基、ブロモベンジル基、ニトロベンジル基、メトキシベンジル基、メチルチオベンジル基、エトキシベンジル基、エチルチオベンジル基、ピペロニル基、メトキシカルボニルメチル基、エトキシカルボニルメチル基、n−プロポキシカルボニルメチル基、i−プロポキシカルボニルメチル基、n−ブトキシカルボニルメチル基、t−ブトキシカルボニルメチル基等を挙げることができる。
上記1−分岐アルキル基としては、例えば、i−プロピル基、sec−ブチル基、t−ブチル基、1,1−ジメチルプロピル基、1−メチルブチル基、1,1−ジメチルブチル基等を挙げることができる。
上記トリオルガノゲルミル基としては、例えば、トリメチルゲルミル基、エチルジメチルゲルミル基、メチルジエチルゲルミル基、トリエチルゲルミル基、イソプロピルジメチルゲルミル基、メチルジ−i−プロピルゲルミル基、トリ−i−プロピルゲルミル基、t−ブチルジメチルゲルミル基、メチルジ−t−ブチルゲルミル基、トリ−t−ブチルゲルミル基、フェニルジメチルゲルミル基、メチルジフェニルゲルミル基、トリフェニルゲルミル基等を挙げることができる。
上記アシル基としては、例えば、アセチル基、プロピオニル基、ブチリル基、ヘプタノイル基、ヘキサノイル基、バレリル基、ピバロイル基、イソバレリル基、ラウロイル基、ミリストイル基、パルミトイル基、ステアロイル基、オキサリル基、マロニル基、スクシニル基、グルタリル基、アジポイル基、ピペロイル基、スベロイル基、アゼラオイル基、セバコイル基、アクリロイル基、プロピオロイル基、メタクリロイル基、クロトノイル基、オレオイル基、マレオイル基、フマロイル基、メサコノイル基、カンホロイル基、ベンゾイル基、フタロイル基、イソフタロイル基、テレフタロイル基、ナフトイル基、トルオイル基、ヒドロアトロポイル基、アトロポイル基、シンナモイル基、フロイル基、テノイル基、ニコチノイル基、イソニコチノイル基、4−トルエンスルホニル基、メシル基等を挙げることができる。
樹脂(B)において、繰り返し単位(1)は、単独でまたは2種以上が存在することができる。
樹脂(B)において、繰り返し単位(2)は、単独でまたは2種以上が存在することができる。
樹脂(B)において、繰り返し単位(3)は、単独でまたは2種以上が存在することができる。
他の繰り返し単位としては、例えば、スチレン、α−メチルスチレン、2−メチルスチレン、3−メチルスチレン、4−メチルスチレン、2−メトキシスチレン、3−メトキシスチレン、4−メトキシスチレン、4−(2−t−ブトキシカルボニルエチルオキシ)スチレン等のビニル芳香族化合物;(メタ)アクリル酸メチル、(メタ)アクリル酸エチル、(メタ)アクリル酸n−プロピル、(メタ)アクリル酸i−プロピル、(メタ)アクリル酸n−ブチル、(メタ)アクリル酸2−メチルプロピル、(メタ)アクリル酸1−メチルプロピル、(メタ)アクリル酸n−ペンチル、(メタ)アクリル酸ネオペンチル、(メタ)アクリル酸n−ヘキシル、(メタ)アクリル酸2−エチルヘキシル、(メタ)アクリル酸2−ヒドロキシエチル、(メタ)アクリル酸2−ヒドロキシ−n−プロピル、(メタ)アクリル酸3−ヒドロキシ−n−プロピル、(メタ)アクリル酸フェニル、(メタ)アクリル酸ベンジル、(メタ)アクリル酸1−メチルアダマンチル、(メタ)アクリル酸1−エチルアダマンチル、(メタ)アクリル酸8−メチル−8−トリシクロデシル、(メタ)アクリル酸8−エチル−8−トリシクロデシル、(メタ)アクリル酸3−メチル−3−テトラシクロドデセニル、(メタ)アクリル酸3−エチル−3−テトラシクロドデセニル、2,5−ジメチルヘキサン−2,5−ジ(メタ)アクリレート等の(メタ)アクリル酸エステル類;
樹脂(B)において、他の繰り返し単位は、単独でまたは2種以上が存在することができる。
また、酸解離性基含有樹脂(B)のMwとゲルパーミエーションクロマトグラフィ(GPC)で測定したポリスチレン換算数分子量(以下、「Mn」という。)との比(Mw/Mn)は、通常、1〜10、好ましくは1〜5である。
本発明において、酸解離性基含有樹脂(B)は、単独でまたは2種以上を混合して使用することができる。
アルカリ溶解制御剤
本発明のポジ型感放射線性樹脂組成物においては、場合により、下記アルカリ溶解制御剤を配合することができる。
アルカリ溶解制御剤としては、例えば、フェノール性水酸基、カルボキシル基等の酸性官能基の水素原子を酸解離性基やt−ブトキシカルボニルメチル基で置換した化合物等が挙げられる。
上記酸解離性基としては、例えば、上記酸解離性基含有樹脂における酸解離性基について例示した置換メチル基、1−置換エチル基、1−置換−n−プロピル基、1−分岐アルキル基、シリル基、ゲルミル基、アルコキシカルボニル基、アシル基、環式酸解離性基等と同様の基が挙げられる。
ポジ型感放射線性樹脂組成物における上記アルカリ溶解性制御剤の配合量は、酸解離性樹脂100重量部に対し0.5〜50重量部、好ましくは1〜30重量部、さらに好ましくは2〜20重量部である。また、アルカリ溶解性制御剤は単独でまたは2種以上を混合して使用できる。
酸拡散制御剤
感放射線性樹脂組成物には、EB、X線、またはEUV照射により酸発生剤から生じた酸のレジスト被膜中における拡散現象を制御し、非照射領域での好ましくない化学反応を抑制する作用を有する酸拡散制御剤を配合することが好ましい。
このような酸拡散制御剤を使用することにより、組成物の貯蔵安定性が向上し、またレジストとして解像度が向上するとともに、照射から照射後の加熱処理までの引き置き時間(PED)の変動によるレジストパターンの線幅変化を抑えることができ、プロセス安定性に極めて優れたものとなる。
このような含窒素有機化合物としては、例えば、下記式(8)で表される化合物(以下、「含窒素化合物(α) )という。」、同一分子内に窒素原子を2個有するジアミノ化合物(以下、「含窒素化合物(β)」という。)、窒素原子を3個以上有するジアミノ重合体(以下、「含窒素化合物(γ) 」という。)、アミド基含有化合物、ウレア化合物、含窒素複素環化合物等が挙げられる。
含窒素化合物(β)としては、例えば、エチレンジアミン、N,N,N',
N'−テトラメチルエチレンジアミン、N,N,N',N'−テトラキス(2−ヒドロキシプロピル)エチレンジアミン、テトラメチレンジアミン、ヘキサメチレンジアミン、4,4'−ジアミノジフェニルメタン、4,4'−ジアミノジフェニルエーテル、4,4'−ジアミノベンゾフェノン、4,4'−ジアミノジフェニルアミン、2,2'−ビス(4−アミノフェニル)プロパン、2−(3−アミノフェニル)−2−(4−アミノフェニル)プロパン、2−(4−アミノフェニル)−2−(3−ヒドロキシフェニル)プロパン、2−(4−アミノフェニル)−2−(4−ヒドロキシフェニル)プロパン、1,4−ビス[1−(4−アミノフェニル)−1−メチルエチル]ベンゼン、1,3−ビス[1−(4−アミノフェニル)−1−メチルエチル]ベンゼン等が挙げられる。
含窒素化合物(γ)としては、例えば、ポリエチレンイミン、ポリアリルアミン、ジメチルアミノエチルアクリルアミドの重合体等が挙げられる。
前記アミド基含有化合物としては、例えば、ホルムアミド、N−メチルホルムアミド、N,N−ジメチルホルムアミド、アセトアミド、N−メチルアセトアミド、N,N−ジメチルアセトアミド、プロピオンアミド、ベンズアミド、ピロリドン、N−メチルピロリドン等が挙げられる。
前記ウレア化合物としては、例えば、尿素、メチルウレア、1,1−ジメチルウレア、1,3−ジメチルウレア、1,1,3,3−テトラメチルウレア、1,3−ジフェニルウレア、トリブチルチオウレア等が挙げられる。
また、前記含窒素有機化合物として、酸解離性基を有する含窒素化合物を用いることもできる。
前記酸解離性基を有する含窒素化合物としては、例えば、N―(t−ブトキシカルボニル)ピペリジン、N―(t−ブトキシカルボニル)イミダゾール、N―(t−ブトキシカルボニル)ベンズイミダゾール、N―(t−ブトキシカルボニル)2フェニルベンズイミダゾール、N―(t−ブトキシカルボニル)ジオクチルアミン、N―(t−ブトキシカルボニル)ジエタノールアミン、N―(t−ブトキシカルボニル)ジシクロヘキシルアミン、N―(t−ブトキシカルボニル)ジフェニルアミン等が挙げられる。
上記酸拡散制御剤は、単独でまたは2種以上を混合して使用することができる。
酸拡散制御剤の配合量は、ポジ型感放射線性樹脂組成物における酸解離性基含有樹脂におけるアルカリ可溶性樹脂100重量部当り、好ましくは0.1〜1重量部、さらに好ましくは0.2〜0.8重量部である。この場合、酸拡散制御剤の配合量が1重量部をこえると、レジストとしての感度や照射部の現像性が低下する傾向がある。なお、酸拡散制御剤の配合量が0.1重量部未満であると、プロセス条件によっては、レジストとしてのパターン形状や寸法忠実度が低下するおそれがある。
感放射線性樹脂組成物の塗布性やストリエーション、レジストとしての現像性等を改良する作用を示す界面活性剤を配合することができる。
このような界面活性剤としては、ポリオキシエチレンラウリルエーテル、ポリオキシエチレンステアリルエーテル、ポリオキシエチレンオレイルエーテル、ポリオキシエチレンn−オクチルフェノールエーテル、ポリオキシエチレンn−ノニルフェノールエーテル、ポリエチレングリコールジラウレート、ポリエチレングリコールジステアレート等を挙げることができ、また市販品としては、例えば、エフトップEF301、同EF303、同EF352(トーケムプロダクツ社製)、メガファックスF171、同F173(以上、大日本インキ化学工業(株)製)、フロラードFC430、同FC431(以上、住友スリーエム(株)製)、アサヒガードAG710、サーフロンS−382、同SC101、同SC102、同SC103、同SC104、同SC105、同SC106(以上、旭硝子(株)製)、KP341(信越化学工業(株)製)、ポリフローNo.75、同No.95(以上、共栄社化学(株)製)等が挙げられる。
これらの界面活性剤は、単独でまたは2種以上を混合して使用することができる。
界面活性剤の配合量は、ポジ型感放射線性樹脂組成物における酸解離性基含有樹脂100重量部当り、好ましくは2重量部以下である。
感放射線性樹脂組成物には、増感剤を配合することができる。好ましい増感剤としては、例えば、カルバゾール類、ベンゾフェノン類、ローズベンガル類、アントラセン類等が挙げられる。
これらの増感剤は、単独でまたは2種以上を混合して使用することができる。増感剤の配合量は、ポジ型レジスト組成物における酸解離性基含有樹脂100重量部当り、好ましくは50重量部以下である。
感放射線性樹脂組成物は、その使用に際して、全固形分の濃度が、通常、0.1〜50重量%、好ましくは1〜30重量%になるように、溶剤に均一に溶解したのち、例えば孔径0.2μm程度のフィルターでろ過することにより、組成物溶液として調製される。
上記組成物溶液の調製に使用される溶剤としては、例えば、エチレングリコールモノメチルエーテルアセテート、エチレングリコールモノエチルエーテルアセテート、エチレングリコールモノ−n−プロピルエーテルアセテート、エチレングリコールモノ−n−ブチルエーテルアセテート等のエチレングリコールモノアルキルエーテルアセテート類;プロピレングリコールモノメチルエーテル、プロピレングリコールモノエチルエーテル、プロピレングリコールモノ−n−プロピルエーテル、プロピレングリコールモノ−n−ブチルエーテル等のプロピレングリコールモノアルキルエーテル類;プロピレングリコールジメチルエーテル、プロピレングリコールジエチルエーテル、プロピレングリコールジ−n−プロピルエーテル、プロピレングリコールジ−n−ブチルエーテル等のプロピレングリコールジアルキルエーテル類;プロピレングリコールモノメチルエーテルアセテート、プロピレングリコールモノエチルエーテルアセテート、プロピレングリコールモノ−n−プロピルエーテルアセテート、プロピレングリコールモノ−n−ブチルエーテルアセテート等のプロピレングリコールモノアルキルエーテルアセテート類;乳酸メチル、乳酸エチル、乳酸n−プロピル、乳酸i−プロピル等の乳酸エステル類;ぎ酸n−アミル、ぎ酸i−アミル、酢酸エチル、酢酸n−プロピル、酢酸i−プロピル、酢酸n−ブチル、酢酸i−ブチル、酢酸n−アミル、酢酸i−アミル、プロピオン酸i−プロピル、プロピオン酸n−ブチル、プロピオン酸i−ブチル等の脂肪族カルボン酸エステル類;ヒドロキシ酢酸エチル、2−ヒドロキシ−2−メチルプロピオン酸エチル、2−ヒドロキシ−3−メチル酪酸メチル、メトキシ酢酸エチル、エトキシ酢酸エチル、3−メトキシプロピオン酸メチル、3−メトキシプロピオン酸エチル、3−エトキシプロピオン酸メチル、3−エトキシプロピオン酸エチル、3−メトキシブチルアセテート、3−メチル−3−メトキシブチルアセテート、3−メチル−3−メトキシブチルプロピオネート、3−メチル−3−メトキシブチルブチレート、アセト酢酸メチル、アセト酢酸エチル、ピルビン酸メチル、ピルビン酸エチル等の他のエステル類;トルエン、キシレン等の芳香族炭化水素類;メチルエチルケトン、メチルプロピルケトン、メチルブチルケトン、2−ヘプタノン、3−ヘプタノン、4−ヘプタノン、シクロヘキサノン等のケトン類;N−メチルホルムアミド、N,N−ジメチルホルムアミド、N−メチルアセトアミド、N,N−ジメチルアセトアミド、N−メチルピロリドン等のアミド類;γ−ブチロラクン等のラクトン類等が挙げられる。
これらの溶剤は、単独でまたは2種以上を混合して使用することができる。
感放射線性樹脂組成物からレジストパターンを形成する際には、前述したようにして調製された組成物溶液を、回転塗布、流延塗布、ロール塗布等の適宜の塗布手段によって、例えば、シリコンウエハ、アルミニウムで被覆されたウエハ等の基板上に塗布し、場合により予め70℃〜160℃程度の温度で加熱処理(以下、「PB」という。)を行なって、レジスト被膜を形成したのち、放射線、好ましくはEBを照射することにより描画する。この描画条件は、感放射線性樹脂組成物の配合組成、各添加剤の種類等に応じて、適宜選定される。
その後、アルカリ現像液により、通常、10〜50℃で10〜200秒、好ましくは15〜30℃で15〜100秒の条件で現像することにより、所定のレジストパターンを形成する。
上記アルカリ現像液としては、例えば、アルカリ金属水酸化物、アンモニア水、モノ−、ジ−あるいはトリ−アルキルアミン類、モノ−、ジ−あるいはトリ−アルカノールアミン類、複素環式アミン類、テトラアルキルアンモニウムヒドロキシド類、コリン、1,8−ジアザビシクロ−[5.4.0]−7−ウンデセン、1,5−ジアザビシクロ−[4.3.0]−5−ノネン等のアルカリ性化合物を、通常、1〜10重量%、好ましくは1〜5重量%、特に好ましくは1〜3重量%の濃度となるよう溶解したアルカリ性水溶液が使用される。
また、上記アルカリ性水溶液からなる現像液には、例えばメタノール、エタノール等の水溶性有機溶剤や界面活性剤を適宜添加することもできる。
レジストパターンの形成に際しては、環境雰囲気中に含まれる塩基性不純物等の影響や被膜中の帯電を防止するため、レジスト被膜上に保護膜や帯電防止膜を設けることができる。
ここで、%および部は特記しない限り重量基準である。
4−アセトキシスチレン97g、4−t−ブトキシスチレン48g、スチレン5g、アゾビスイソブチロニトリル6gおよびt−ドデシルメルカプタン0.9gを、プロピレングリコールモノメチルエーテル150gに溶解したのち、窒素雰囲気下、反応温度を70℃に保持して、16時間重合させた。重合後、反応溶液を大量のn−ヘキサン中に滴下して、生成共重合体を凝固精製した。
次いで、この共重合体に、再度プロピレングリコールモノメチルエーテル150gを加えたのち、さらにメタノール300g、トリエチルアミン70g、水12gを加えて、沸点にて還流させながら、8時間加水分解反応を行った。反応後、溶剤およびトリエチルアミンを減圧留去し、得られた共重合体をアセトンに溶解したのち、大量の水中に滴下して凝固させ、生成した白色粉末をろ過して、減圧下50℃で一晩乾燥した。
得られた共重合体は、Mwが16,000、Mw/Mnが1.7であり、13C−NMR分析の結果、4−ヒドロキシスチレンと4−t−ブトキシスチレンとスチレンとの共重合モル比が65:30:5であった。MwおよびMw/Mnは、東ソー(株)製高速GPC装置(型式「HLC−8120」)に東ソー(株)製のGPCカラム(商品名「G2000HXL」;2本、「G3000HXL」;1本、「G4000HXL」;1本)を用い、流量1.0ミリリットル/分、溶出溶剤テトラヒドロフラン、カラム温度40℃の分析条件で、単分散ポリスチレンを標準とするゲルパーミエーションクロマトグラフィ(GPC)により測定した。
この化合物を酸解離性基含有樹脂(B−1)とし、その化学構造式を以下に示す。
4−アセトキシスチレン102g、アクリル酸t−ブチル27g、スチレン21g、アゾビスイソブチロニトリル7gおよびt−ドデシルメルカプタン1gを、プロピレングリコールモノメチルエーテル225gに溶解したのち、窒素雰囲気下、反応温度を70℃に保持して16時間重合させた。重合後、反応溶液を大量のn−ヘキサン中に滴下して、生成共重合体を凝固精製した。
次いで、この共重合体に、再度プロピレングリコールモノメチルエーテル150gを加えたのち、さらにメタノール300g、トリエチルアミン75g、水14gを加えて、沸点にて還流させながら、8時間加水分解反応を行った。反応後、溶剤およびトリエチルアミンを減圧留去し、得られた共重合体をアセトンに溶解したのち、大量の水中に滴下して凝固させ、生成した白色粉末をろ過して、減圧下50℃で一晩乾燥した。
得られた共重合体は、Mwが11,500、Mw/Mnが1.6であり、13C−NMR分析の結果、4−ヒドロキシスチレンとアクリル酸t−ブチルととスチレンとの共重合モル比が60:20:20であった。この共重合体を酸解離性基含有樹脂(B−2)とし、その化学構造式を以下に示す。
4−アセトキシスチレン96g、アクリル酸1−エチル−1−シクロペンチル54g、アゾビスイソブチロニトリル6g、t−ドデシルメルカプタン0.9gを、プロピレングリコールモノメチルエーテル150gに溶解したのち、窒素雰囲気下、反応温度を70℃に保持して16時間重合させた。重合後、反応溶液を大量のn−ヘキサン中に滴下して、生成共重合体を凝固精製した。
次いで、この共重合体に、再度プロピレングリコールモノメチルエーテル150gを加えたのち、さらにメタノール300g、トリエチルアミン70g、水12gを加えて、沸点にて還流させながら、8時間加水分解反応を行った。反応後、溶剤およびトリエチルアミンを減圧留去し、得られた共重合体をアセトンに溶解したのち、大量の水中に滴下して凝固させ、生成した白色粉末をろ過して、減圧下50℃で一晩乾燥した。
得られた共重合体は、Mwが15,000、Mw/Mnが1.6であり、13C−NMR分析の結果、4−ヒドロキシスチレンとアクリル酸1−エチル−1−シクロペンチルとの共重合モル比が65:35であった。この共重合体を酸解離性基含有樹脂(B−3)とし、その化学構造式を以下に示す。
4−アセトキシスチレン88.5g、アクリル酸2−メチル−2−アダマンチル61.5g、アゾビスイソブチロニトリル5.5g、t−ドデシルメルカプタン0.8gを、プロピレングリコールモノメチルエーテル150gに溶解したのち、窒素雰囲気下、反応温度を70℃に保持して16時間重合させた。重合後、反応溶液を大量のn−ヘキサン中に滴下して、生成共重合体を凝固精製した。
次いで、この共重合体に、再度プロピレングリコールモノメチルエーテル150gを加えたのち、さらにメタノール300g、トリエチルアミン65g、水11.5gを加えて、沸点にて還流させながら、8時間加水分解反応を行った。反応後、溶剤およびトリエチルアミンを減圧留去し、得られた共重合体をアセトンに溶解したのち、大量の水中に滴下して凝固させ、生成した白色粉末をろ過して、減圧下50℃で一晩乾燥した。
得られた共重合体は、Mwが16,000、Mw/Mnが1.8であり、13C−NMR分析の結果、4−ヒドロキシスチレンとアクリル酸2−メチル−2−アダマンチルとの共重合モル比が65:35であった。この共重合体を酸解離性基含有樹脂(B−4)とし、その化学構造式を以下に示す。
モル比90:10の4−ヒドロキシスチレンと4−t−ブトキシスチレン共重合物(日本曹達製VPT1503S)25gを、酢酸n−ブチル100gに溶解して、窒素ガスにより30分間バブリングを行なったのち、エチルビニルエーテル3.3gを加え、触媒として4−トルエンスルホン酸ピリジニウム塩1gを添加し、室温で12時間反応させた。その後、反応溶液を1重量%アンモニア水溶液中に滴下し、樹脂を沈殿させて、ろ過したのち、50℃の真空乾燥器内で一晩乾燥した。
得られた共重合体は、Mwが13,000、Mw/Mnが1.01であり、13C−NMR分析の結果、4−ヒドロキシスチレンが67モル%、フェノール性水酸基の水素原子がエトキシエチル基で置換された単位が23モル%、4−t−ブトキシスチレンが10モル%の共重合体であった。この共重合体を、酸解離性基含有樹脂(B−5)とし、その化学構造式を以下に示す。
(A)酸発生剤
A−1;N−(トリフルオロメチルスルホニウムオキシ)ビシクロ[2.2.1]ヘプト−5−エン−2,3−ジカルボキシイミド
A−2;トリフェニルスルホニウムトリフルオロメタンスルホネート
A−3;(4−ヒドロキシフェニル)ジフェニルスルホニウムトリフルオロメタンスルホネート
A−4;2,4,6−トリメチルフェニルジフェニルスルホニウム4−トリフルオロメチルベンゼンスルホネート
A−5;ジフェニルヨードニウムトリフルオロメタンスルホネート
A−6;ビス(1,4−ジオキサスピロ[4.5]ウンデカン−7−スルホニル)ジアゾメタン
A−7;(4−t−ブトキシカルボニルメトキシフェニル)ジフェニルトリフルオロメタンスルホネート
A−8;(4−t−ブトキシカルボニルメトキシフェニル)ジフェニルノナフルオロ−n−ブタンスルホネート
A−9;(4−t−ブトキシカルボニルメトキシフェニル)ジフェニル4−トリフルオロメチルベンゼンスルホネート
A−10;(4−t−ブトキシカルボニルメトキシフェニル)ジフェニル2−(ビシクロ[2.2.1]ヘプタン−2−イル)−1,1,2,2−テトラフルオロエタンスルホネート
(B)酸解離性含有樹脂
B−1;4−ヒドロキシスチレン/4−t−ブトキシスチレン/スチレン(モル比で65/30/5)共重合体(Mw;16000、Mw/Mn;1.7)(合成例1)
B−2;4−ヒドロキシスチレン/アクリル酸t−ブチル/スチレン(モル比で60/20/20)共重合体(Mw;11500、Mw/Mn;1.6)(合成例2)
B−3;4−ヒドロキシスチレン/アクリル酸1−エチル−1−シクロペンチル(モル比で65/35)共重合体(Mw;15000、Mw/Mn;1.6)(合成例3)
B−4;4−ヒドロキシスチレン/アクリル酸2−メチル−2−アダマンチル(モル比で65/35)共重合体(Mw;16000、Mw/Mn;1.8)(合成例4)
B−5;4−ヒドロキシスチレン/4−エトキシキシエチルスチレン/4−ブトキシスチレン(モル比で67/23/10)共重合体(Mw;13000、Mw/Mn;1.01)(合成例5)
(C)酸拡散制御剤
C−1;N―(t−ブトキシカルボニル)2フェニルベンズイミダゾール
C−2;N−t−ブトキシカルボニルジシクロヘキシルアミン
C−3;トリ−n−オクチルアミン
(D)溶剤
D−1;乳酸エチル
D−2;プロピレングリコールモノメチルエーテルアセテート
ホジ型感放射線性樹脂組成物の配合を表1(但し、それぞれの表において、部は重量に基づく)に示す。各成分を混合して均一溶液とした後、孔径200nmのメンブランフィルターでろ過し異物を除去して、レジスト溶液を調整した。その後、これらのレジスト溶液を8インチのシリコンウエハに回転塗布し、膜厚200nmのレジスト被膜を形成した。次いで、簡易型の電子線描画装置(日立社製、型式「HL800D」、出力;50KeV、電流密度;5.0アンペア/cm2)を用いてレジスト被膜に電子線を照射した。照射後、表2に示す条件でPEBを行ない、次いで、テトラメチルアンモニウムヒドロキシドを2.38重量%含む水溶液を用い、パドル法により、23℃で60秒間現像を行なった。その後、水で30秒間洗浄し、乾燥してレジストパターンを形成した。レジスト組成物の評価を下記(1)、(2)および(3)に従い行なった。その結果を表2に示す。なお、表1および表2において、実施例1〜5、実施例8〜14は参考例である。
(1)感度
シリコンウエハ上に形成したレジスト被膜に電子線照射し、直ちにPEBを行なって、アルカリ現像したのち、水洗し、乾燥して、レジストパターンを形成したとき、線幅130nmのライン・アンド・スペースパターンが1対1の線幅に形成する露光量を最適照射量とし、この最適照射量を感度とした。
(2)解像度
最適照射量で照射したときに解像されるレジストパターンの最小寸法(nm)を解像度とした。
(3)LWR(ラインラフネス特性)
上記で解像度とした線幅をラインパターンの長さ方向に50μm、任意の30点について半導体用走査電子顕微鏡S−9220日立高分解能FEB測長装置にて側長し、その線幅バラツキの分散を3σで算出した。
Claims (2)
- 感放射線性酸発生剤(A)と、アルカリ不溶性またはアルカリ難溶性であって酸の作用によりアルカリ易溶性となる酸解離性基含有樹脂(B)と、酸拡散制御剤(C)とを含み、電子線、X線、または極紫外線を用いてパターニングされるポジ型感放射線性樹脂組成物であって、
前記酸解離性基含有樹脂(B)100重量部に対して、前記感放射線性酸発生剤(A)が20重量部以上80重量部以下、および前記酸拡散制御剤(C)が0.1重量部以上1重量部以下含まれ、
前記酸解離性基含有樹脂(B)は下記式(1)で表される繰り返し単位および下記式(3)で表される繰り返し単位を含むことを特徴とするポジ型感放射線性樹脂組成物。
- 前記感放射線性酸発生剤(A)がスルホニルオキシイミド化合物、スルホニウム塩化合物、ヨードニウム塩化合物、およびジアゾニウム塩化合物より選ばれる少なくとも1つの化合物であることを特徴とする請求項1記載のポジ型感放射線性樹脂組成物。
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