JP5237692B2 - モノマー、ポリマー、感光性樹脂組成物及びレジストパターンの形成方法 - Google Patents
モノマー、ポリマー、感光性樹脂組成物及びレジストパターンの形成方法 Download PDFInfo
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- JP5237692B2 JP5237692B2 JP2008133370A JP2008133370A JP5237692B2 JP 5237692 B2 JP5237692 B2 JP 5237692B2 JP 2008133370 A JP2008133370 A JP 2008133370A JP 2008133370 A JP2008133370 A JP 2008133370A JP 5237692 B2 JP5237692 B2 JP 5237692B2
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- 239000000758 substrate Substances 0.000 claims description 9
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- HKKMPPDCCCBZHM-UHFFFAOYSA-M [4-[(2-methylpropan-2-yl)oxy]phenyl]-diphenylsulfanium;trifluoromethanesulfonate Chemical compound [O-]S(=O)(=O)C(F)(F)F.C1=CC(OC(C)(C)C)=CC=C1[S+](C=1C=CC=CC=1)C1=CC=CC=C1 HKKMPPDCCCBZHM-UHFFFAOYSA-M 0.000 description 1
- ISFXMNADAJKIEG-UHFFFAOYSA-M [4-[(2-methylpropan-2-yl)oxy]phenyl]-phenyliodanium;trifluoromethanesulfonate Chemical compound [O-]S(=O)(=O)C(F)(F)F.C1=CC(OC(C)(C)C)=CC=C1[I+]C1=CC=CC=C1 ISFXMNADAJKIEG-UHFFFAOYSA-M 0.000 description 1
- QMDPBBZVKXBEGM-UHFFFAOYSA-N [4-methyl-3-(4-methylphenyl)sulfonyloxypentan-2-yl] 4-methylbenzenesulfonate Chemical compound C=1C=C(C)C=CC=1S(=O)(=O)OC(C)C(C(C)C)OS(=O)(=O)C1=CC=C(C)C=C1 QMDPBBZVKXBEGM-UHFFFAOYSA-N 0.000 description 1
- QFKJMDYQKVPGNM-UHFFFAOYSA-N [benzenesulfonyl(diazo)methyl]sulfonylbenzene Chemical compound C=1C=CC=CC=1S(=O)(=O)C(=[N+]=[N-])S(=O)(=O)C1=CC=CC=C1 QFKJMDYQKVPGNM-UHFFFAOYSA-N 0.000 description 1
- GLGXSTXZLFQYKJ-UHFFFAOYSA-N [cyclohexylsulfonyl(diazo)methyl]sulfonylcyclohexane Chemical compound C1CCCCC1S(=O)(=O)C(=[N+]=[N-])S(=O)(=O)C1CCCCC1 GLGXSTXZLFQYKJ-UHFFFAOYSA-N 0.000 description 1
- DUJLILQBTCLTDQ-UHFFFAOYSA-N [cyclopentylsulfonyl(diazo)methyl]sulfonylcyclopentane Chemical compound C1CCCC1S(=O)(=O)C(=[N+]=[N-])S(=O)(=O)C1CCCC1 DUJLILQBTCLTDQ-UHFFFAOYSA-N 0.000 description 1
- FEVJONIJUZTKGL-UHFFFAOYSA-N [tert-butylsulfonyl(diazo)methyl]sulfonylcyclohexane Chemical compound CC(C)(C)S(=O)(=O)C(=[N+]=[N-])S(=O)(=O)C1CCCCC1 FEVJONIJUZTKGL-UHFFFAOYSA-N 0.000 description 1
- IKHGUXGNUITLKF-XPULMUKRSA-N acetaldehyde Chemical compound [14CH]([14CH3])=O IKHGUXGNUITLKF-XPULMUKRSA-N 0.000 description 1
- 125000002252 acyl group Chemical group 0.000 description 1
- VLLNJDMHDJRNFK-UHFFFAOYSA-N adamantan-1-ol Chemical compound C1C(C2)CC3CC2CC1(O)C3 VLLNJDMHDJRNFK-UHFFFAOYSA-N 0.000 description 1
- 150000001334 alicyclic compounds Chemical class 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- XYLMUPLGERFSHI-UHFFFAOYSA-N alpha-Methylstyrene Chemical compound CC(=C)C1=CC=CC=C1 XYLMUPLGERFSHI-UHFFFAOYSA-N 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 238000007611 bar coating method Methods 0.000 description 1
- 150000007514 bases Chemical class 0.000 description 1
- CXJVMJWCNFOERL-UHFFFAOYSA-N benzenesulfonylsulfonylbenzene Chemical compound C=1C=CC=CC=1S(=O)(=O)S(=O)(=O)C1=CC=CC=C1 CXJVMJWCNFOERL-UHFFFAOYSA-N 0.000 description 1
- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 description 1
- FYGUSUBEMUKACF-UHFFFAOYSA-N bicyclo[2.2.1]hept-2-ene-5-carboxylic acid Chemical compound C1C2C(C(=O)O)CC1C=C2 FYGUSUBEMUKACF-UHFFFAOYSA-N 0.000 description 1
- NIDNOXCRFUCAKQ-UHFFFAOYSA-N bicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid Chemical compound C1C2C=CC1C(C(=O)O)C2C(O)=O NIDNOXCRFUCAKQ-UHFFFAOYSA-N 0.000 description 1
- TZLWRLOYRRZECT-UHFFFAOYSA-N bicyclo[2.2.1]hept-5-ene-2,3-diol Chemical compound C1C2C(O)C(O)C1C=C2 TZLWRLOYRRZECT-UHFFFAOYSA-N 0.000 description 1
- 239000004305 biphenyl Substances 0.000 description 1
- 235000010290 biphenyl Nutrition 0.000 description 1
- LLEMOWNGBBNAJR-UHFFFAOYSA-N biphenyl-2-ol Chemical compound OC1=CC=CC=C1C1=CC=CC=C1 LLEMOWNGBBNAJR-UHFFFAOYSA-N 0.000 description 1
- WTXDNMDDFAESOT-UHFFFAOYSA-M bis[4-[(2-methylpropan-2-yl)oxy]phenyl]-phenylsulfanium;4-methylbenzenesulfonate Chemical compound CC1=CC=C(S([O-])(=O)=O)C=C1.C1=CC(OC(C)(C)C)=CC=C1[S+](C=1C=CC(OC(C)(C)C)=CC=1)C1=CC=CC=C1 WTXDNMDDFAESOT-UHFFFAOYSA-M 0.000 description 1
- SSCOHVUVCBYNFB-UHFFFAOYSA-M bis[4-[(2-methylpropan-2-yl)oxy]phenyl]-phenylsulfanium;trifluoromethanesulfonate Chemical compound [O-]S(=O)(=O)C(F)(F)F.C1=CC(OC(C)(C)C)=CC=C1[S+](C=1C=CC(OC(C)(C)C)=CC=1)C1=CC=CC=C1 SSCOHVUVCBYNFB-UHFFFAOYSA-M 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- QPXMRCTYZIAUQD-UHFFFAOYSA-M butane-1-sulfonate;triphenylsulfanium Chemical compound CCCCS([O-])(=O)=O.C1=CC=CC=C1[S+](C=1C=CC=CC=1)C1=CC=CC=C1 QPXMRCTYZIAUQD-UHFFFAOYSA-M 0.000 description 1
- SEXLAQXMAFCJCO-UHFFFAOYSA-N butyl trifluoromethanesulfonate Chemical compound CCCCOS(=O)(=O)C(F)(F)F SEXLAQXMAFCJCO-UHFFFAOYSA-N 0.000 description 1
- ZTQSAGDEMFDKMZ-UHFFFAOYSA-N butyric aldehyde Natural products CCCC=O ZTQSAGDEMFDKMZ-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 239000012986 chain transfer agent Substances 0.000 description 1
- HNEGQIOMVPPMNR-IHWYPQMZSA-N citraconic acid Chemical compound OC(=O)C(/C)=C\C(O)=O HNEGQIOMVPPMNR-IHWYPQMZSA-N 0.000 description 1
- 229940018557 citraconic acid Drugs 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 150000001879 copper Chemical class 0.000 description 1
- 229930003836 cresol Natural products 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- LDHQCZJRKDOVOX-NSCUHMNNSA-N crotonic acid Chemical compound C\C=C\C(O)=O LDHQCZJRKDOVOX-NSCUHMNNSA-N 0.000 description 1
- 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 1
- PMBLWUNGLHPHHX-UHFFFAOYSA-N cyclohexylmethyl trifluoromethanesulfonate 2-sulfanylcyclohexan-1-one Chemical compound O=C(CCCC1)C1S.O=S(C(F)(F)F)(OCC1CCCCC1)=O PMBLWUNGLHPHHX-UHFFFAOYSA-N 0.000 description 1
- ODOYKCYDOVBTAR-UHFFFAOYSA-N cyclohexylsulfonylsulfonylcyclohexane Chemical compound C1CCCCC1S(=O)(=O)S(=O)(=O)C1CCCCC1 ODOYKCYDOVBTAR-UHFFFAOYSA-N 0.000 description 1
- 229960002887 deanol Drugs 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- ATCZONOLUJITKL-UHFFFAOYSA-N dicyclohexyl bicyclo[2.2.1]hept-5-ene-2,3-dicarboxylate Chemical compound C1=CC2CC1C(C(=O)OC1CCCCC1)C2C(=O)OC1CCCCC1 ATCZONOLUJITKL-UHFFFAOYSA-N 0.000 description 1
- OVLXQLQBOCAFDH-UHFFFAOYSA-M dicyclohexyl(phenyl)sulfanium;4-methylbenzenesulfonate Chemical compound CC1=CC=C(S([O-])(=O)=O)C=C1.C1CCCCC1[S+](C=1C=CC=CC=1)C1CCCCC1 OVLXQLQBOCAFDH-UHFFFAOYSA-M 0.000 description 1
- NSXRYFKEEKGLHO-UHFFFAOYSA-M dicyclohexyl(phenyl)sulfanium;trifluoromethanesulfonate Chemical compound [O-]S(=O)(=O)C(F)(F)F.C1CCCCC1[S+](C=1C=CC=CC=1)C1CCCCC1 NSXRYFKEEKGLHO-UHFFFAOYSA-M 0.000 description 1
- ZEFVHSWKYCYFFL-UHFFFAOYSA-N diethyl 2-methylidenebutanedioate Chemical compound CCOC(=O)CC(=C)C(=O)OCC ZEFVHSWKYCYFFL-UHFFFAOYSA-N 0.000 description 1
- IEPRKVQEAMIZSS-AATRIKPKSA-N diethyl fumarate Chemical compound CCOC(=O)\C=C\C(=O)OCC IEPRKVQEAMIZSS-AATRIKPKSA-N 0.000 description 1
- HPNMFZURTQLUMO-UHFFFAOYSA-N diethylamine Chemical compound CCNCC HPNMFZURTQLUMO-UHFFFAOYSA-N 0.000 description 1
- SBZXBUIDTXKZTM-UHFFFAOYSA-N diglyme Chemical compound COCCOCCOC SBZXBUIDTXKZTM-UHFFFAOYSA-N 0.000 description 1
- 239000012972 dimethylethanolamine Substances 0.000 description 1
- 150000002009 diols Chemical class 0.000 description 1
- UMIKAXKFQJWKCV-UHFFFAOYSA-M diphenyliodanium;4-methylbenzenesulfonate Chemical compound CC1=CC=C(S([O-])(=O)=O)C=C1.C=1C=CC=CC=1[I+]C1=CC=CC=C1 UMIKAXKFQJWKCV-UHFFFAOYSA-M 0.000 description 1
- 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 1
- LTYMSROWYAPPGB-UHFFFAOYSA-O diphenylsulfanium Chemical compound C=1C=CC=CC=1[SH+]C1=CC=CC=C1 LTYMSROWYAPPGB-UHFFFAOYSA-O 0.000 description 1
- WEHWNAOGRSTTBQ-UHFFFAOYSA-N dipropylamine Chemical compound CCCNCCC WEHWNAOGRSTTBQ-UHFFFAOYSA-N 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- UHKJHMOIRYZSTH-UHFFFAOYSA-N ethyl 2-ethoxypropanoate Chemical compound CCOC(C)C(=O)OCC UHKJHMOIRYZSTH-UHFFFAOYSA-N 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000001530 fumaric acid Substances 0.000 description 1
- VOZRXNHHFUQHIL-UHFFFAOYSA-N glycidyl methacrylate Chemical compound CC(=C)C(=O)OCC1CO1 VOZRXNHHFUQHIL-UHFFFAOYSA-N 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 125000004029 hydroxymethyl group Chemical group [H]OC([H])([H])* 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 239000004310 lactic acid Substances 0.000 description 1
- 235000014655 lactic acid Nutrition 0.000 description 1
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 1
- 239000011976 maleic acid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- HNEGQIOMVPPMNR-NSCUHMNNSA-N mesaconic acid Chemical compound OC(=O)C(/C)=C/C(O)=O HNEGQIOMVPPMNR-NSCUHMNNSA-N 0.000 description 1
- FQPSGWSUVKBHSU-UHFFFAOYSA-N methacrylamide Chemical compound CC(=C)C(N)=O FQPSGWSUVKBHSU-UHFFFAOYSA-N 0.000 description 1
- 125000005395 methacrylic acid group Chemical group 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- BDJSOPWXYLFTNW-UHFFFAOYSA-N methyl 3-methoxypropanoate Chemical compound COCCC(=O)OC BDJSOPWXYLFTNW-UHFFFAOYSA-N 0.000 description 1
- LVHBHZANLOWSRM-UHFFFAOYSA-N methylenebutanedioic acid Natural products OC(=O)CC(=C)C(O)=O LVHBHZANLOWSRM-UHFFFAOYSA-N 0.000 description 1
- HNEGQIOMVPPMNR-UHFFFAOYSA-N methylfumaric acid Natural products OC(=O)C(C)=CC(O)=O HNEGQIOMVPPMNR-UHFFFAOYSA-N 0.000 description 1
- 125000004170 methylsulfonyl group Chemical group [H]C([H])([H])S(*)(=O)=O 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- GNVRJGIVDSQCOP-UHFFFAOYSA-N n-ethyl-n-methylethanamine Chemical compound CCN(C)CC GNVRJGIVDSQCOP-UHFFFAOYSA-N 0.000 description 1
- 150000002828 nitro derivatives Chemical class 0.000 description 1
- JFNLZVQOOSMTJK-KNVOCYPGSA-N norbornene Chemical compound C1[C@@H]2CC[C@H]1C=C2 JFNLZVQOOSMTJK-KNVOCYPGSA-N 0.000 description 1
- SFBTTWXNCQVIEC-UHFFFAOYSA-N o-Vinylanisole Chemical compound COC1=CC=CC=C1C=C SFBTTWXNCQVIEC-UHFFFAOYSA-N 0.000 description 1
- 150000001451 organic peroxides Chemical class 0.000 description 1
- 150000002923 oximes Chemical class 0.000 description 1
- RPQRDASANLAFCM-UHFFFAOYSA-N oxiran-2-ylmethyl prop-2-enoate Chemical compound C=CC(=O)OCC1CO1 RPQRDASANLAFCM-UHFFFAOYSA-N 0.000 description 1
- QNGNSVIICDLXHT-UHFFFAOYSA-N para-ethylbenzaldehyde Natural products CCC1=CC=C(C=O)C=C1 QNGNSVIICDLXHT-UHFFFAOYSA-N 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
- JGTNAGYHADQMCM-UHFFFAOYSA-N perfluorobutanesulfonic acid Chemical compound OS(=O)(=O)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F JGTNAGYHADQMCM-UHFFFAOYSA-N 0.000 description 1
- KTNLYTNKBOKXRW-UHFFFAOYSA-N phenyliodanium Chemical compound [IH+]C1=CC=CC=C1 KTNLYTNKBOKXRW-UHFFFAOYSA-N 0.000 description 1
- 125000003170 phenylsulfonyl group Chemical group C1(=CC=CC=C1)S(=O)(=O)* 0.000 description 1
- 229920002120 photoresistant polymer Polymers 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 150000004053 quinones Chemical class 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 125000002914 sec-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 150000003333 secondary alcohols Chemical class 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
- 235000019795 sodium metasilicate Nutrition 0.000 description 1
- 238000004528 spin coating Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000001384 succinic acid Substances 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 1
- 150000003460 sulfonic acids Chemical class 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-O sulfonium Chemical compound [SH3+] RWSOTUBLDIXVET-UHFFFAOYSA-O 0.000 description 1
- 235000001508 sulfur Nutrition 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- BZBMBZJUNPMEBD-UHFFFAOYSA-N tert-butyl bicyclo[2.2.1]hept-2-ene-5-carboxylate Chemical compound C1C2C(C(=O)OC(C)(C)C)CC1C=C2 BZBMBZJUNPMEBD-UHFFFAOYSA-N 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 150000003509 tertiary alcohols Chemical class 0.000 description 1
- 229940073455 tetraethylammonium hydroxide Drugs 0.000 description 1
- LRGJRHZIDJQFCL-UHFFFAOYSA-M tetraethylazanium;hydroxide Chemical compound [OH-].CC[N+](CC)(CC)CC LRGJRHZIDJQFCL-UHFFFAOYSA-M 0.000 description 1
- 125000003944 tolyl 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
- 125000002889 tridecyl group Chemical group [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])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- AANIRNIRVXARSN-UHFFFAOYSA-M trifluoromethanesulfonate;trimethylsulfanium Chemical compound C[S+](C)C.[O-]S(=O)(=O)C(F)(F)F AANIRNIRVXARSN-UHFFFAOYSA-M 0.000 description 1
- TUODWSVQODNTSU-UHFFFAOYSA-M trifluoromethanesulfonate;tris[4-[(2-methylpropan-2-yl)oxy]phenyl]sulfanium Chemical compound [O-]S(=O)(=O)C(F)(F)F.C1=CC(OC(C)(C)C)=CC=C1[S+](C=1C=CC(OC(C)(C)C)=CC=1)C1=CC=C(OC(C)(C)C)C=C1 TUODWSVQODNTSU-UHFFFAOYSA-M 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
- WLOQLWBIJZDHET-UHFFFAOYSA-N triphenylsulfonium Chemical compound C1=CC=CC=C1[S+](C=1C=CC=CC=1)C1=CC=CC=C1 WLOQLWBIJZDHET-UHFFFAOYSA-N 0.000 description 1
- 239000012953 triphenylsulfonium Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 150000003739 xylenols Chemical class 0.000 description 1
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- Exposure And Positioning Against Photoresist Photosensitive Materials (AREA)
- Materials For Photolithography (AREA)
- Phenolic Resins Or Amino Resins (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Description
架橋型のネガ型感光性樹脂組成物としては、カルボン酸等のアルカリ可溶性基及びラジカル重合可能な不飽和二重結合を有する樹脂と、光ラジカル開始剤とを組み合わせたものが使用されている。また、アルカリ可溶性樹脂と、アルカリ可溶性樹脂と反応し得る架橋剤と、光酸発生剤とからなる組成物も使用されている。
従って、本発明の目的は、酸存在下での極性変化の反応性に優れるポリマーを提供することにある。
また、本発明の他の目的は、モノマーとして安定に存在し、且つ重合時の反応性に優れ、上記ポリマーの原料として使用可能なモノマーを提供することにある。
更に、本発明の他の目的は、液晶表示素子、集積回路素子、固体撮像素子、プリント配線基板等の回路形成に使用することのできる、パターン形成時の感度、基材処理後のレジストパターンの剥離性に優れる感光性樹脂組成物を提供することにある。
で表される構造を有することを特徴とするモノマーである。
本発明は、上記感光性樹脂組成物を基板に塗布して塗膜を形成した後、露光し、現像することを特徴とするレジストパターンの形成方法である。
反応させる際のモル比はヒドロキシフェニル(メタ)アクリレート類1.0モルに対して、2,3−エポキシ−1−プロパノールを好ましくは1.0モル〜1.5モル、更に好ましくは1.0モル〜1.1モル、最も好ましくは1.0モル〜1.05モルである。2,3−エポキシ−1−プロパノールが少な過ぎても多過ぎても、得られるモノマーの純度が低下するため好ましくない。
なお、このポリマーの重量平均分子量は、ゲル・パーミッション・クロマトグラフィー(GPC)を用いて、下記条件にて測定し、ポリスチレン換算にて算出されるものである。
カラム:ショーデックス KF−801+KF−802+KF−802+KF−803
カラム温度:40℃
展開溶媒:テトラヒドロフラン
検出器:示差屈折計(ショーデックス RI−101)
流速:1mL/min
また、一般式(II)の構成単位を含むポリマーは、一般式(I)の構成単位を含むポリマーを製造するのと同様に、ヒドロキシフェニル(メタ)アクリレート類を構成単位として含むポリマーに、2,3−エポキシ−1−プロパノールを反応させることにより製造することもできる。反応条件については、ノボラック樹脂と2,3−エポキシ−1−プロパノールとの反応と同様の条件を採用することができる。
なお、このポリマーの重量平均分子量は、一般式(I)で表される構造を構成単位として含むポリマーと同様に算出されるものである。
上記の特性をより向上させる観点から、ラジカル重合可能なモノマー全量に対して、一般式(III)におけるR1がアクリロイルオキシ基又はメタクリロイルオキシ基であるモノマーを10モル%〜80モル%とすることが好ましく、15モル%〜70モル%とすることが更に好ましく、20モル%〜60モル%とすることが最も好ましい。一般式(III)におけるR1がアクリロイルオキシ基又はメタクリロイルオキシ基であるモノマーが10モル%未満であると、解像度、残膜率が低下する場合があり、また、80モル%を超えると、感度が低下する可能性がある。特に、アルカリ水溶液で現像する場合には、一般式(III)におけるR1がアクリロイルオキシ基又はメタクリロイルオキシ基であるモノマーを20〜50モル%の割合で共重合させたものが好ましい。上記範囲とすることで、解像度及び現像性に優れたポリマーとすることができる。
有機溶媒は、感光性樹脂組成物の固形分が好ましくは5質量%〜40質量%、更に好ましくは10質量%〜30質量%になるように添加すればよい。
まず、ガラス基板、シリコンウエハー又はこれらの表面に各種金属層が形成された基板上に、本発明の感光性樹脂組成物を塗布し、乾燥させて感光性樹脂組成物の塗膜を形成する。感光性樹脂組成物の塗布方法には、例えば、スプレー法、ロールコート法、回転塗布法、バー塗布法等の公知の方法を制限なく採用することができる。乾燥条件は、各成分の種類や配合割合に応じて適宜設定すればよいが、通常、60℃〜110℃で30秒〜15分である。塗膜の膜厚は、用途に応じて適宜変えればよいが、通常、0.5μm〜50μmである。
[実施例1]
還流冷却器及び攪拌機を備えたフラスコに、p−ヒドロキシフェニルメタクリレート100質量部、トリエチルアミン1.0質量部及びエタノール40質量部を仕込み、攪拌した。液温を70℃に調節しながら、2,3−エポキシ−1−プロパノール43.7質量部を5時間掛けて滴下した。滴下終了後、70℃で2時間攪拌し反応を完結させた。エタノールを減圧下で蒸留により除去し、4−(2,3−ジヒドロキシプロピル)オキシフェニルメタクリレート143質量部を得た。なお、反応の完結は、赤外分光(IR)測定により反応を追跡し、エポキシ基に由来する754cm-1、829cm-1、903cm-1及び1260cm-1が消失すること、並びにエーテル結合に由来する1045cm-1が出現することにより確認した。
還流冷却器及び攪拌機を備えたフラスコに、m−ヒドロキシフェニルメタクリレート100質量部、トリエチルアミン1.0質量部及びエタノール40質量部を仕込み、攪拌した。液温を70℃に調節しながら、2,3−エポキシ−1−プロパノール43.7質量部を5時間掛けて滴下した。滴下終了後、70℃で2時間攪拌し反応を完結させた。エタノールを減圧下で蒸留により除去し、3−(2,3−ジヒドロキシプロピル)オキシフェニルメタクリレート143質量部を得た。なお、反応の完結は、赤外分光(IR)測定により反応を追跡し、エポキシ基に由来する754cm-1、829cm-1、903cm-1及び1260cm-1が消失すること、並びにエーテル結合に由来する1045cm-1が出現することにより確認した。
還流冷却器及び攪拌機を備えたフラスコに、p−ヒドロキシフェニルアクリレート100質量部、トリエチルアミン1.0質量部及びエタノール40質量部を仕込み、攪拌した。液温を70℃に調節しながら、2,3−エポキシ−1−プロパノール47.4質量部を5時間掛けて滴下した。滴下終了後、70℃で2時間攪拌し反応を完結させた。エタノールを減圧下で蒸留により除去し、4−(2,3−ジヒドロキシプロピル)オキシフェニルアクリレート147質量部を得た。なお、反応の完結は、赤外分光(IR)測定により反応を追跡し、エポキシ基に由来する754cm-1、829cm-1、903cm-1及び1260cm-1が消失すること、並びにエーテル結合に由来する1045cm-1が出現することにより確認した。
[実施例4]
還流冷却器及び攪拌機を備えたフラスコに、p−ヒドロキシフェニルメタクリレート15質量部、実施例1で得られたモノマー85質量部、乳酸エチル300質量部及びアゾビスイソブチロニトリル4.0質量部を仕込み、攪拌した。液温を80℃に調節しながら、2時間撹拌し重合反応を行った。更に、アゾビスイソブチロニトリル2.0質量部を添加し、80℃で3時間撹拌し反応を完結させ、ポリマーを得た。なお、反応の完結は、ゲル浸透クロマトグラフィー(GPC)測定でモノマーが消失していることにより確認した。
還流冷却器及び攪拌機を備えたフラスコに、m−ヒドロキシフェニルメタクリレート15質量部、実施例2で得られたモノマー85質量部、乳酸エチル300質量部及びアゾビスイソブチロニトリル4.0質量部を仕込み、攪拌した。液温を80℃に調節しながら、2時間撹拌し重合反応を行った。更に、アゾビスイソブチロニトリル2.0質量部を添加し、80℃で3時間撹拌し反応を完結させ、ポリマーを得た。なお、反応の完結は、ゲル浸透クロマトグラフィー(GPC)測定でモノマーが消失していることにより確認した。
還流冷却器及び攪拌機を備えたフラスコに、p−ヒドロキシフェニルアクリレート14.7質量部、実施例3で得られたモノマー85.3質量部、乳酸エチル300質量部及びアゾビスイソブチロニトリル4.0質量部を仕込み、攪拌した。液温を80℃に調節しながら、2時間撹拌し重合反応を行った。更に、アゾビスイソブチロニトリル2.0質量部を添加し、80℃で3時間撹拌し重合反応を完結させ、ポリマーを得た。なお、反応の完結は、ゲル浸透クロマトグラフィー(GPC)測定でモノマーが消失していることにより確認した。
還流冷却器及び攪拌機を備えたフラスコに、p−ヒドロキシフェニルメタクリレート62.2質量部、実施例1で得られたモノマー37.8質量部、乳酸エチル300質量部及びアゾビスイソブチロニトリル4.0質量部を仕込み攪拌を開始した。液温を80℃に調節しながら、2時間撹拌し重合反応を行った。更に、アゾビスイソブチロニトリル2.0質量部を添加し、80℃で3時間撹拌し重合反応を完結させ、ポリマーを得た。なお、反応の完結は、ゲル浸透クロマトグラフィー(GPC)測定でモノマーが消失していることにより確認した。
還流冷却器及び攪拌機を備えたフラスコに、BRM−565(昭和高分子株式会社製、m−クレゾールノボラック樹脂)100質量部、トリエチルアミン2.0質量部及びエタノール40質量部を仕込み、攪拌した。液温を80℃に調節しながら、2,3−エポキシ−1−プロパノール37.6質量部を5時間掛けて滴下した。滴下終了後、80℃で2時間攪拌し反応を完結させ、ポリマーを得た。なお、反応の完結は、IR測定でエポキシ基に由来する754cm-1、829cm-1、903cm-1及び1260cm-1が消失していることにより確認した。
[実施例9]
実施例4で得られたポリマーの固形分100質量部に対し、トリフルオロメタンスルホン酸トリフェニルスルホニウム5.0質量部を添加し、続いて、組成物の固形分が20質量%になるように乳酸エチルを添加し、感光性樹脂組成物を調製した。得られた感光性樹脂組成物をスピンコーターでガラス基板に塗布し、ホットプレートにより110℃で90秒間乾燥させた。乾燥後、塗膜の膜厚は2.0μmであった。次に、塗膜上にパターンマスクを介して超高圧水銀灯(波長300〜450nmを主波長とする連続光)で露光を行い、ホットプレートにより130℃で5分間の後加熱を行った。25℃のエタノールで5分間現像を行った結果、パターンマスクのパターンが転写された。
実施例4で得られたポリマーの代わりに、実施例5で得られたポリマーを用いること以外は実施例9と同様にして感光性樹脂組成物を調製し、露光、現像を行ったところ、パターンマスクのパターンが転写された。なお、パターン形成後の塗膜を25℃のメタノールに5分間浸漬したところ、完全に溶解した。
実施例4で得られたポリマーの代わりに、実施例6で得られたポリマーを用いること以外は実施例9と同様にして感光性樹脂組成物を調製し、露光、現像を行ったところ、パターンマスクのパターンが転写された。なお、パターン形成後の塗膜を25℃のメタノールに5分間浸漬したところ、完全に溶解した。
実施例4で得られたポリマーの代わりに、実施例7で得られたポリマーを用いること以外は実施例9と同様にして感光性樹脂組成物を調製し、露光、現像を行ったところ、パターンマスクのパターンが転写された。また、現像を2.38%テトラメチルアンモニウムヒドロキシドの水溶液で行ったところ、同様にパターンマスクのパターンが転写された。なお、パターン形成後の塗膜を25℃のメタノールに5分間浸漬したところ、完全に溶解した。
実施例4で得られたポリマーの代わりに、実施例8で得られたポリマーを用いること以外は実施例9と同様にして感光性樹脂組成物を調製し、露光、現像を行ったところ、パターンマスクのパターンが転写された。また、現像を2.38%テトラメチルアンモニウムヒドロキシドの水溶液で行ったところ、同様にパターンマスクのパターンが転写された。なお、パターン形成後の塗膜を25℃のメタノールに5分間浸漬したところ、完全に溶解した。
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