JP4257527B2 - 化学増幅ポジ型レジスト材料及びパターン形成方法 - Google Patents
化学増幅ポジ型レジスト材料及びパターン形成方法 Download PDFInfo
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- JP4257527B2 JP4257527B2 JP2004168601A JP2004168601A JP4257527B2 JP 4257527 B2 JP4257527 B2 JP 4257527B2 JP 2004168601 A JP2004168601 A JP 2004168601A JP 2004168601 A JP2004168601 A JP 2004168601A JP 4257527 B2 JP4257527 B2 JP 4257527B2
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- resist material
- polymer
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- trifluoro
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- 239000000463 material Substances 0.000 title claims description 41
- 238000000034 method Methods 0.000 title claims description 20
- -1 cyclohexanediyl group Chemical group 0.000 claims description 239
- 229920000642 polymer Polymers 0.000 claims description 40
- 125000004432 carbon atom Chemical group C* 0.000 claims description 37
- 239000002253 acid Substances 0.000 claims description 28
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 28
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 24
- 125000000217 alkyl group Chemical group 0.000 claims description 19
- 150000007514 bases Chemical class 0.000 claims description 18
- 125000002023 trifluoromethyl group Chemical group FC(F)(F)* 0.000 claims description 18
- 125000006165 cyclic alkyl group Chemical group 0.000 claims description 13
- 125000002723 alicyclic group Chemical group 0.000 claims description 12
- 239000003960 organic solvent Substances 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 11
- 229930195734 saturated hydrocarbon Natural products 0.000 claims description 11
- 125000005843 halogen group Chemical group 0.000 claims description 10
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 10
- 125000000816 ethylene group Chemical group [H]C([H])([*:1])C([H])([H])[*:2] 0.000 claims description 9
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 claims description 8
- 125000004185 ester group Chemical group 0.000 claims description 8
- 125000001033 ether group Chemical group 0.000 claims description 8
- 239000000758 substrate Substances 0.000 claims description 8
- 238000010894 electron beam technology Methods 0.000 claims description 7
- 125000006373 (C2-C10) alkyl group Chemical group 0.000 claims description 4
- 125000004093 cyano group Chemical group *C#N 0.000 claims description 4
- 125000001183 hydrocarbyl group Chemical group 0.000 claims 2
- 238000006243 chemical reaction Methods 0.000 description 28
- 150000001875 compounds Chemical class 0.000 description 24
- 150000002118 epoxides Chemical class 0.000 description 22
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 description 15
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 15
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 15
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 15
- 239000000203 mixture Substances 0.000 description 15
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 14
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 13
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 12
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 12
- 230000015572 biosynthetic process Effects 0.000 description 12
- 150000002430 hydrocarbons Chemical group 0.000 description 12
- 125000003118 aryl group Chemical group 0.000 description 11
- 238000007796 conventional method Methods 0.000 description 11
- 239000002904 solvent Substances 0.000 description 11
- 238000003786 synthesis reaction Methods 0.000 description 11
- KZJRKRQSDZGHEC-UHFFFAOYSA-N 2,2,2-trifluoro-1-phenylethanone Chemical compound FC(F)(F)C(=O)C1=CC=CC=C1 KZJRKRQSDZGHEC-UHFFFAOYSA-N 0.000 description 10
- 238000005530 etching Methods 0.000 description 10
- 239000011347 resin Substances 0.000 description 10
- 229920005989 resin Polymers 0.000 description 10
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 9
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 9
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 9
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical class CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 9
- 150000007513 acids Chemical class 0.000 description 9
- 239000003054 catalyst Substances 0.000 description 9
- 150000003944 halohydrins Chemical class 0.000 description 9
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 9
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 9
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 8
- 0 CC(*)C(C)(C)C(C)C(Cl)Cl Chemical compound CC(*)C(C)(C)C(C)C(Cl)Cl 0.000 description 8
- YXHKONLOYHBTNS-UHFFFAOYSA-N Diazomethane Chemical class C=[N+]=[N-] YXHKONLOYHBTNS-UHFFFAOYSA-N 0.000 description 8
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 description 8
- ZSWFCLXCOIISFI-UHFFFAOYSA-N cyclopentadiene Chemical compound C1C=CC=C1 ZSWFCLXCOIISFI-UHFFFAOYSA-N 0.000 description 8
- 238000001308 synthesis method Methods 0.000 description 8
- AFVFQIVMOAPDHO-UHFFFAOYSA-N Methanesulfonic acid Chemical compound CS(O)(=O)=O AFVFQIVMOAPDHO-UHFFFAOYSA-N 0.000 description 7
- 125000003545 alkoxy group Chemical group 0.000 description 7
- 150000002148 esters Chemical class 0.000 description 7
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 7
- 239000010408 film Substances 0.000 description 7
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 7
- VHRYZQNGTZXDNX-UHFFFAOYSA-N methacryloyl chloride Chemical compound CC(=C)C(Cl)=O VHRYZQNGTZXDNX-UHFFFAOYSA-N 0.000 description 7
- JOXIMZWYDAKGHI-UHFFFAOYSA-N toluene-4-sulfonic acid Chemical compound CC1=CC=C(S(O)(=O)=O)C=C1 JOXIMZWYDAKGHI-UHFFFAOYSA-N 0.000 description 7
- 238000010626 work up procedure Methods 0.000 description 7
- NCJZVRPXSSYDBG-UHFFFAOYSA-N 2,2,2-trifluoro-1-(4-methoxyphenyl)ethanone Chemical compound COC1=CC=C(C(=O)C(F)(F)F)C=C1 NCJZVRPXSSYDBG-UHFFFAOYSA-N 0.000 description 6
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 6
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 description 6
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 125000003710 aryl alkyl group Chemical group 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 239000012299 nitrogen atmosphere Substances 0.000 description 6
- 239000002994 raw material Substances 0.000 description 6
- 150000003839 salts Chemical class 0.000 description 6
- 230000035945 sensitivity Effects 0.000 description 6
- 229940124530 sulfonamide Drugs 0.000 description 6
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 6
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 6
- WGTYBPLFGIVFAS-UHFFFAOYSA-M tetramethylammonium hydroxide Chemical compound [OH-].C[N+](C)(C)C WGTYBPLFGIVFAS-UHFFFAOYSA-M 0.000 description 6
- ITMCEJHCFYSIIV-UHFFFAOYSA-M triflate Chemical compound [O-]S(=O)(=O)C(F)(F)F ITMCEJHCFYSIIV-UHFFFAOYSA-M 0.000 description 6
- LJHFIVQEAFAURQ-ZPUQHVIOSA-N (NE)-N-[(2E)-2-hydroxyiminoethylidene]hydroxylamine Chemical class O\N=C\C=N\O LJHFIVQEAFAURQ-ZPUQHVIOSA-N 0.000 description 5
- VINRTVDNUHIWCB-UHFFFAOYSA-N 2,2,2-trifluoro-1-(2,4,6-trimethylphenyl)ethanone Chemical compound CC1=CC(C)=C(C(=O)C(F)(F)F)C(C)=C1 VINRTVDNUHIWCB-UHFFFAOYSA-N 0.000 description 5
- DYILUJUELMWXAL-UHFFFAOYSA-N 2,2,2-trifluoro-1-(4-methylphenyl)ethanone Chemical compound CC1=CC=C(C(=O)C(F)(F)F)C=C1 DYILUJUELMWXAL-UHFFFAOYSA-N 0.000 description 5
- 125000004864 4-thiomethylphenyl group Chemical group 0.000 description 5
- 238000007259 addition reaction Methods 0.000 description 5
- 125000002947 alkylene group Chemical group 0.000 description 5
- 229920005601 base polymer Polymers 0.000 description 5
- 238000004587 chromatography analysis Methods 0.000 description 5
- 238000004440 column chromatography Methods 0.000 description 5
- SBZXBUIDTXKZTM-UHFFFAOYSA-N diglyme Chemical compound COCCOCCOC SBZXBUIDTXKZTM-UHFFFAOYSA-N 0.000 description 5
- 238000004821 distillation Methods 0.000 description 5
- 125000001624 naphthyl group Chemical group 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 5
- 238000000746 purification Methods 0.000 description 5
- 238000001953 recrystallisation Methods 0.000 description 5
- 150000003456 sulfonamides Chemical class 0.000 description 5
- KYXIHKXHBSORRJ-UHFFFAOYSA-N 1-(2,4-dimethylphenyl)-2,2,2-trifluoroethanone Chemical compound CC1=CC=C(C(=O)C(F)(F)F)C(C)=C1 KYXIHKXHBSORRJ-UHFFFAOYSA-N 0.000 description 4
- 238000005160 1H NMR spectroscopy Methods 0.000 description 4
- XNWFRZJHXBZDAG-UHFFFAOYSA-N 2-METHOXYETHANOL Chemical compound COCCO XNWFRZJHXBZDAG-UHFFFAOYSA-N 0.000 description 4
- PQMCFTMVQORYJC-UHFFFAOYSA-N 2-aminocyclohexan-1-ol Chemical compound NC1CCCCC1O PQMCFTMVQORYJC-UHFFFAOYSA-N 0.000 description 4
- IMLXLGZJLAOKJN-UHFFFAOYSA-N 4-aminocyclohexan-1-ol Chemical compound NC1CCC(O)CC1 IMLXLGZJLAOKJN-UHFFFAOYSA-N 0.000 description 4
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- 238000005481 NMR spectroscopy Methods 0.000 description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 4
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 4
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 4
- WQDUMFSSJAZKTM-UHFFFAOYSA-N Sodium methoxide Chemical compound [Na+].[O-]C WQDUMFSSJAZKTM-UHFFFAOYSA-N 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-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
- 150000001298 alcohols Chemical class 0.000 description 4
- 125000003342 alkenyl group Chemical group 0.000 description 4
- 150000001408 amides Chemical class 0.000 description 4
- 229910021529 ammonia Inorganic materials 0.000 description 4
- WTEOIRVLGSZEPR-UHFFFAOYSA-N boron trifluoride Chemical compound FB(F)F WTEOIRVLGSZEPR-UHFFFAOYSA-N 0.000 description 4
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 4
- 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 4
- 238000011161 development Methods 0.000 description 4
- 125000004051 hexyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 4
- 150000002576 ketones Chemical class 0.000 description 4
- 229940098779 methanesulfonic acid Drugs 0.000 description 4
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 4
- 238000002156 mixing Methods 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
- KVBGVZZKJNLNJU-UHFFFAOYSA-N naphthalene-2-sulfonic acid Chemical compound C1=CC=CC2=CC(S(=O)(=O)O)=CC=C21 KVBGVZZKJNLNJU-UHFFFAOYSA-N 0.000 description 4
- 150000002825 nitriles Chemical class 0.000 description 4
- 125000001147 pentyl group Chemical group C(CCCC)* 0.000 description 4
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 4
- 125000002914 sec-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 150000003459 sulfonic acid esters Chemical class 0.000 description 4
- 230000008961 swelling Effects 0.000 description 4
- 239000010409 thin film Substances 0.000 description 4
- WJKHJLXJJJATHN-UHFFFAOYSA-N triflic anhydride Chemical compound FC(F)(F)S(=O)(=O)OS(=O)(=O)C(F)(F)F WJKHJLXJJJATHN-UHFFFAOYSA-N 0.000 description 4
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 description 4
- DURPTKYDGMDSBL-UHFFFAOYSA-N 1-butoxybutane Chemical compound CCCCOCCCC DURPTKYDGMDSBL-UHFFFAOYSA-N 0.000 description 3
- RRQYJINTUHWNHW-UHFFFAOYSA-N 1-ethoxy-2-(2-ethoxyethoxy)ethane Chemical compound CCOCCOCCOCC RRQYJINTUHWNHW-UHFFFAOYSA-N 0.000 description 3
- JOLQKTGDSGKSKJ-UHFFFAOYSA-N 1-ethoxypropan-2-ol Chemical compound CCOCC(C)O JOLQKTGDSGKSKJ-UHFFFAOYSA-N 0.000 description 3
- ARXJGSRGQADJSQ-UHFFFAOYSA-N 1-methoxypropan-2-ol Chemical compound COCC(C)O ARXJGSRGQADJSQ-UHFFFAOYSA-N 0.000 description 3
- JHQDBQYFKARISA-UHFFFAOYSA-N 2,2,2-trifluoro-1-(2-methylphenyl)ethanone Chemical compound CC1=CC=CC=C1C(=O)C(F)(F)F JHQDBQYFKARISA-UHFFFAOYSA-N 0.000 description 3
- OISVCGZHLKNMSJ-UHFFFAOYSA-N 2,6-dimethylpyridine Chemical compound CC1=CC=CC(C)=N1 OISVCGZHLKNMSJ-UHFFFAOYSA-N 0.000 description 3
- SBASXUCJHJRPEV-UHFFFAOYSA-N 2-(2-methoxyethoxy)ethanol Chemical compound COCCOCCO SBASXUCJHJRPEV-UHFFFAOYSA-N 0.000 description 3
- KJXSTIJHXKFZKV-UHFFFAOYSA-N 2-(cyclohexylmethylsulfanyl)cyclohexan-1-one;trifluoromethanesulfonic acid Chemical compound [O-]S(=O)(=O)C(F)(F)F.O=C1CCCCC1[SH+]CC1CCCCC1 KJXSTIJHXKFZKV-UHFFFAOYSA-N 0.000 description 3
- VLSRKCIBHNJFHA-UHFFFAOYSA-N 2-(trifluoromethyl)prop-2-enoic acid Chemical compound OC(=O)C(=C)C(F)(F)F VLSRKCIBHNJFHA-UHFFFAOYSA-N 0.000 description 3
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
- FXHOOIRPVKKKFG-UHFFFAOYSA-N N,N-Dimethylacetamide Chemical compound CN(C)C(C)=O FXHOOIRPVKKKFG-UHFFFAOYSA-N 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 239000004809 Teflon Substances 0.000 description 3
- 229920006362 Teflon® Polymers 0.000 description 3
- FNWYZEBVBHWXQG-UHFFFAOYSA-N [4-(methanesulfonamido)cyclohexyl] prop-2-enoate Chemical compound CS(=O)(=O)NC1CCC(OC(=O)C=C)CC1 FNWYZEBVBHWXQG-UHFFFAOYSA-N 0.000 description 3
- 125000002777 acetyl group Chemical group [H]C([H])([H])C(*)=O 0.000 description 3
- 125000005073 adamantyl group Chemical group C12(CC3CC(CC(C1)C3)C2)* 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 125000001511 cyclopentyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C1([H])[H] 0.000 description 3
- 125000002704 decyl 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])* 0.000 description 3
- 229940019778 diethylene glycol diethyl ether Drugs 0.000 description 3
- 238000001312 dry etching Methods 0.000 description 3
- 238000005886 esterification reaction Methods 0.000 description 3
- 150000002170 ethers Chemical class 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000004817 gas chromatography Methods 0.000 description 3
- 125000003187 heptyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 3
- 229930195733 hydrocarbon Natural products 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 125000001570 methylene group Chemical group [H]C([H])([*:1])[*:2] 0.000 description 3
- PSZYNBSKGUBXEH-UHFFFAOYSA-N naphthalene-1-sulfonic acid Chemical compound C1=CC=C2C(S(=O)(=O)O)=CC=CC2=C1 PSZYNBSKGUBXEH-UHFFFAOYSA-N 0.000 description 3
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 description 3
- 125000002347 octyl 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])[H] 0.000 description 3
- 238000000206 photolithography Methods 0.000 description 3
- LPNYRYFBWFDTMA-UHFFFAOYSA-N potassium tert-butoxide Chemical compound [K+].CC(C)(C)[O-] LPNYRYFBWFDTMA-UHFFFAOYSA-N 0.000 description 3
- LLHKCFNBLRBOGN-UHFFFAOYSA-N propylene glycol methyl ether acetate Chemical compound COCC(C)OC(C)=O LLHKCFNBLRBOGN-UHFFFAOYSA-N 0.000 description 3
- 230000035484 reaction time Effects 0.000 description 3
- 230000001603 reducing effect Effects 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 125000000565 sulfonamide group Chemical group 0.000 description 3
- 125000000383 tetramethylene group Chemical group [H]C([H])([*:1])C([H])([H])C([H])([H])C([H])([H])[*:2] 0.000 description 3
- 238000004809 thin layer chromatography Methods 0.000 description 3
- 238000002834 transmittance Methods 0.000 description 3
- 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 3
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 3
- WMGVPDQNPUQRND-UHFFFAOYSA-N (2-methylphenyl)acetonitrile Chemical compound CC1=CC=CC=C1CC#N WMGVPDQNPUQRND-UHFFFAOYSA-N 0.000 description 2
- YFISYXOGMSGFRE-UHFFFAOYSA-N 1-(3,4-dimethoxyphenyl)-2,2,2-trifluoroethanone Chemical compound COC1=CC=C(C(=O)C(F)(F)F)C=C1OC YFISYXOGMSGFRE-UHFFFAOYSA-N 0.000 description 2
- SCKJMHAZRHWHTP-UHFFFAOYSA-N 1-(4-benzylphenyl)-2,2,2-trifluoroethanone Chemical compound C1=CC(C(=O)C(F)(F)F)=CC=C1CC1=CC=CC=C1 SCKJMHAZRHWHTP-UHFFFAOYSA-N 0.000 description 2
- WNQSKPOIYILBMI-UHFFFAOYSA-N 1-[butylsulfonyl(diazo)methyl]sulfonylbutane Chemical compound CCCCS(=O)(=O)C(=[N+]=[N-])S(=O)(=O)CCCC WNQSKPOIYILBMI-UHFFFAOYSA-N 0.000 description 2
- GYQQFWWMZYBCIB-UHFFFAOYSA-N 1-[diazo-(4-methylphenyl)sulfonylmethyl]sulfonyl-4-methylbenzene Chemical compound C1=CC(C)=CC=C1S(=O)(=O)C(=[N+]=[N-])S(=O)(=O)C1=CC=C(C)C=C1 GYQQFWWMZYBCIB-UHFFFAOYSA-N 0.000 description 2
- 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 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
- HXSIAJREWWAACY-UHFFFAOYSA-N 2-(trifluoromethyl)prop-2-enoyl chloride Chemical compound FC(F)(F)C(=C)C(Cl)=O HXSIAJREWWAACY-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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- 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
- CYQUIWZGOBANMJ-UHFFFAOYSA-M dimethyl(phenyl)sulfanium;trifluoromethanesulfonate Chemical compound [O-]S(=O)(=O)C(F)(F)F.C[S+](C)C1=CC=CC=C1 CYQUIWZGOBANMJ-UHFFFAOYSA-M 0.000 description 1
- JGUQDUKBUKFFRO-CIIODKQPSA-N dimethylglyoxime Chemical compound O/N=C(/C)\C(\C)=N\O JGUQDUKBUKFFRO-CIIODKQPSA-N 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
- 238000004090 dissolution Methods 0.000 description 1
- 229940069096 dodecene Drugs 0.000 description 1
- KWKXNDCHNDYVRT-UHFFFAOYSA-N dodecylbenzene Chemical compound CCCCCCCCCCCCC1=CC=CC=C1 KWKXNDCHNDYVRT-UHFFFAOYSA-N 0.000 description 1
- 125000001301 ethoxy group Chemical group [H]C([H])([H])C([H])([H])O* 0.000 description 1
- 125000006232 ethoxy propyl group Chemical group [H]C([H])([H])C([H])([H])OC([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000005448 ethoxyethyl group Chemical group [H]C([H])([H])C([H])([H])OC([H])([H])C([H])([H])* 0.000 description 1
- 125000005745 ethoxymethyl group Chemical group [H]C([H])([H])C([H])([H])OC([H])([H])* 0.000 description 1
- 229940116333 ethyl lactate Drugs 0.000 description 1
- 229940117360 ethyl pyruvate Drugs 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 125000001153 fluoro group Chemical group F* 0.000 description 1
- 125000001207 fluorophenyl group Chemical group 0.000 description 1
- 125000002541 furyl group Chemical group 0.000 description 1
- 125000001072 heteroaryl group Chemical group 0.000 description 1
- 125000000623 heterocyclic group Chemical group 0.000 description 1
- FUZZWVXGSFPDMH-UHFFFAOYSA-M hexanoate Chemical compound CCCCCC([O-])=O FUZZWVXGSFPDMH-UHFFFAOYSA-M 0.000 description 1
- 125000006038 hexenyl group Chemical group 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 125000004464 hydroxyphenyl group Chemical group 0.000 description 1
- 150000003949 imides Chemical class 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 125000002510 isobutoxy group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])O* 0.000 description 1
- 125000003253 isopropoxy group Chemical group [H]C([H])([H])C([H])(O*)C([H])([H])[H] 0.000 description 1
- 238000001459 lithography Methods 0.000 description 1
- 239000011976 maleic acid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- QARBMVPHQWIHKH-UHFFFAOYSA-N methanesulfonyl chloride Chemical compound CS(Cl)(=O)=O QARBMVPHQWIHKH-UHFFFAOYSA-N 0.000 description 1
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 description 1
- 125000004184 methoxymethyl group Chemical group [H]C([H])([H])OC([H])([H])* 0.000 description 1
- SUHOWDMWVWQBPK-UHFFFAOYSA-N methyl 2-[4-(2,2,2-trifluoroacetyl)phenoxy]acetate Chemical compound COC(=O)COC1=CC=C(C(=O)C(F)(F)F)C=C1 SUHOWDMWVWQBPK-UHFFFAOYSA-N 0.000 description 1
- BDJSOPWXYLFTNW-UHFFFAOYSA-N methyl 3-methoxypropanoate Chemical compound COCCC(=O)OC BDJSOPWXYLFTNW-UHFFFAOYSA-N 0.000 description 1
- 125000004170 methylsulfonyl group Chemical group [H]C([H])([H])S(*)(=O)=O 0.000 description 1
- 239000012046 mixed solvent Substances 0.000 description 1
- IMERQFYKRPXONQ-UHFFFAOYSA-N n-(2-hydroxycyclohexyl)methanesulfonamide Chemical compound CS(=O)(=O)NC1CCCCC1O IMERQFYKRPXONQ-UHFFFAOYSA-N 0.000 description 1
- PDYUCXOQBNSGKN-UHFFFAOYSA-N n-[2,2,2-trifluoro-1-(2,4,6-trimethylphenyl)ethylidene]hydroxylamine Chemical compound CC1=CC(C)=C(C(=NO)C(F)(F)F)C(C)=C1 PDYUCXOQBNSGKN-UHFFFAOYSA-N 0.000 description 1
- 125000006606 n-butoxy group Chemical group 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
- 238000006386 neutralization reaction Methods 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- UMRZSTCPUPJPOJ-KNVOCYPGSA-N norbornane Chemical compound C1C[C@H]2CC[C@@H]1C2 UMRZSTCPUPJPOJ-KNVOCYPGSA-N 0.000 description 1
- 229920003986 novolac Polymers 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 150000002923 oximes Chemical class 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
- 125000006340 pentafluoro ethyl group Chemical group FC(F)(F)C(F)(F)* 0.000 description 1
- 125000004817 pentamethylene group Chemical group [H]C([H])([*:2])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[*:1] 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
- 125000000286 phenylethyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000003170 phenylsulfonyl group Chemical group C1(=CC=CC=C1)S(=O)(=O)* 0.000 description 1
- 238000001020 plasma etching Methods 0.000 description 1
- 229920000193 polymethacrylate Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 125000001844 prenyl group Chemical group [H]C([*])([H])C([H])=C(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 150000003139 primary aliphatic amines Chemical class 0.000 description 1
- 150000003141 primary amines Chemical class 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 125000004368 propenyl group Chemical group C(=CC)* 0.000 description 1
- 125000002572 propoxy group Chemical group [*]OC([H])([H])C(C([H])([H])[H])([H])[H] 0.000 description 1
- 125000006233 propoxy propyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])OC([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000006225 propoxyethyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])OC([H])([H])C([H])([H])* 0.000 description 1
- 125000005767 propoxymethyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])[#8]C([H])([H])* 0.000 description 1
- 238000000425 proton nuclear magnetic resonance spectrum Methods 0.000 description 1
- 125000004076 pyridyl group Chemical group 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 238000010526 radical polymerization reaction Methods 0.000 description 1
- 239000011541 reaction mixture Substances 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 238000007142 ring opening reaction Methods 0.000 description 1
- 150000005619 secondary aliphatic amines Chemical class 0.000 description 1
- 230000001568 sexual effect Effects 0.000 description 1
- 238000010898 silica gel chromatography Methods 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000004528 spin coating Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 230000006103 sulfonylation Effects 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 125000004213 tert-butoxy group Chemical group [H]C([H])([H])C(O*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- WMOVHXAZOJBABW-UHFFFAOYSA-N tert-butyl acetate Chemical compound CC(=O)OC(C)(C)C WMOVHXAZOJBABW-UHFFFAOYSA-N 0.000 description 1
- JAELLLITIZHOGQ-UHFFFAOYSA-N tert-butyl propanoate Chemical compound CCC(=O)OC(C)(C)C JAELLLITIZHOGQ-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
- 150000003510 tertiary aliphatic amines Chemical class 0.000 description 1
- 125000003944 tolyl group Chemical group 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
- LDHQCZJRKDOVOX-UHFFFAOYSA-N trans-crotonic acid Natural products CC=CC(O)=O LDHQCZJRKDOVOX-UHFFFAOYSA-N 0.000 description 1
- 125000003866 trichloromethyl group Chemical group ClC(Cl)(Cl)* 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
- UPWIJTYOHJOEOX-UHFFFAOYSA-M trifluoromethanesulfonate;trinaphthalen-1-ylsulfanium Chemical compound [O-]S(=O)(=O)C(F)(F)F.C1=CC=C2C([S+](C=3C4=CC=CC=C4C=CC=3)C=3C4=CC=CC=C4C=CC=3)=CC=CC2=C1 UPWIJTYOHJOEOX-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
- 125000001889 triflyl group Chemical group FC(F)(F)S(*)(=O)=O 0.000 description 1
- 125000003258 trimethylene group Chemical group [H]C([H])([*:2])C([H])([H])C([H])([H])[*:1] 0.000 description 1
- 238000000233 ultraviolet lithography Methods 0.000 description 1
- 238000000870 ultraviolet spectroscopy Methods 0.000 description 1
- 229920001567 vinyl ester resin Polymers 0.000 description 1
- UKRDPEFKFJNXQM-UHFFFAOYSA-N vinylsilane Chemical class [SiH3]C=C UKRDPEFKFJNXQM-UHFFFAOYSA-N 0.000 description 1
- 150000007934 α,β-unsaturated carboxylic acids Chemical class 0.000 description 1
Landscapes
- Exposure And Positioning Against Photoresist Photosensitive Materials (AREA)
- Materials For Photolithography (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Description
更に、特にArFエキシマレーザー光用レジスト材料での大きな問題として、膨潤、即ち露光部と未露光部の境界での現像時の体積上昇を原因とする細線でのパターン倒れによる解像性の低下が挙げられている。
[I]下記一般式(1a)、(2a)、(3a)又は(1a’)で示される繰り返し単位を含有し、重量平均分子量2,000〜100,000である重合体を含有することを特徴とする化学増幅ポジ型レジスト材料。
[II]更に、重合体が下記一般式(4a)で示される繰り返し単位を1種又は2種以上含有することを特徴とする[I]記載のレジスト材料。
[III]更に、重合体が下記一般式(5a)で示される繰り返し単位を1種又は2種以上含有することを特徴とする[II]記載のレジスト材料。
[IV]重合体が、一般式(1a)、(2a)又は(3a)で示される繰り返し単位のモル分率が少なくとも5%であることを特徴とする[I]乃至[III]のいずれか1項に記載のレジスト材料。
[V](B)酸発生剤、(C)有機溶剤を含有することを特徴とする[I]乃至[IV]のいずれか1項に記載のレジスト材料。
[VI](B)酸発生剤、(C)有機溶剤、(D)塩基性化合物を含有することを特徴とする[I]乃至[IV]のいずれか1項に記載のレジスト材料。
[VII](1)[I]乃至[VI]のいずれか1項に記載のレジスト材料を基板上に塗布する工程、(2)次いで、加熱処理後、フォトマスクを介して波長300nm以下の高エネルギー線又は電子線で露光する工程、(3)加熱処理後、現像液を用いて現像する工程、を含むことを特徴とするパターン形成方法。
本発明は下記一般式(1)又は(1’)で示される重合性エステル化合物を提供する。
上記一般式(1)及び(1’)中、R2は水素原子の一部又は全部がハロゲン原子で置換されていてもよい炭素数1〜10の鎖状、分岐状又は環状のアルキル基を表す。R2の水素原子の一部又は全部がハロゲン原子で置換されていてもよい炭素数1〜10の鎖状、分岐状又は環状のアルキル基として具体的には、メチル基、エチル基、プロピル基、2−プロピル基、ブチル基、2−ブチル基、イソブチル基、t−ブチル基、ペンチル基、ヘキシル基、シクロへキシル基、デシル基、トリクロロメチル基、トリフルオロメチル基、ペンタフルオロエチル基、ノナフルオロブチル基、ヘプタデカフルオロオクチル基を例示できる。用途に応じてR2を選択することによりスルホンアミド基の酸性度を最適に調整し、ひいては本化合物を利用したフォトレジストの特性を調整することが可能である。
即ち、第1の合成法は、以下に示すエポキシドを原料とした2段階の反応によるものである。
第1段階の反応では下記式に示すエポキシド(6)のスルホンアミド(7)による開環反応によりアルコール化合物(8)を得る。反応は溶媒中、エポキシド(6)とスルホンアミド(7)を混合し、必要に応じて加熱することにより行う。反応の触媒として酸性化合物又は塩基性化合物を添加してもよい。
また、前記一般式(1)で示されるエステル化合物は、下記一般式(3)で示される構造であることが好ましい。
即ち、上記一般式(3)で示されるエステル化合物は対応するアミノアルコール化合物を原料とした下記式に示す2段階の反応により合成できる。原料となるアミノアルコール化合物は対応するアミノフェノール、アミノナフトール、ニトロフェノール、ニトロナフトールなどを常法に従って還元することによって調製可能である。
第二段階の反応はアルコール(12)のアルコール部分のエステル化であり、前記一般式(2)で示されるエステル化合物の第1の合成法の2段階目と同様にして行うことができる。
また、下記式に示すように、上記の合成法などにより合成したアクリレートエステル(13)(前記一般式(1)においてR1=Hである化合物)とシクロペンタジエンを用いたDiels−Alder反応を行うことにより、前記一般式(1’)に示す重合性エステル化合物を合成できるが、この方法に限定されない。
更に、本発明の重合体は下記一般式(4a)で示される繰り返し単位を1種又は2種以上含有することが好ましい。
本発明の重合体は、レジスト材料、特にポジ型レジスト材料、とりわけ化学増幅レジスト材料のベースポリマーとして好適である。
この場合、本発明のレジスト材料は、
(A)ベース樹脂として上記重合体、
(B)酸発生剤、
(C)有機溶剤、
(D)好ましくは塩基性化合物
を含有するものであることが好ましい。
i.下記一般式(P1a−1)、(P1a−2)又は(P1b)のオニウム塩、
ii.下記一般式(P2)のジアゾメタン誘導体、
iii.下記一般式(P3)のグリオキシム誘導体、
iv.下記一般式(P4)のビススルホン誘導体、
v.下記一般式(P5)のN−ヒドロキシイミド化合物のスルホン酸エステル、
vi.β−ケトスルホン酸誘導体、
vii.ジスルホン誘導体、
viii.ニトロベンジルスルホネート誘導体、
ix.スルホン酸エステル誘導体、
x.オキシムスルホン酸エステル
等が挙げられる。
2−シクロヘキシルカルボニル−2−(p−トルエンスルホニル)プロパン、2−イソプロピルカルボニル−2−(p−トルエンスルホニル)プロパン等のβ−ケトスルホン誘導体。
p−トルエンスルホン酸2,6−ジニトロベンジル、p−トルエンスルホン酸2,4−ジニトロベンジル等のニトロベンジルスルホネート誘導体。
1,2,3−トリス(メタンスルホニルオキシ)ベンゼン、1,2,3−トリス(トリフルオロメタンスルホニルオキシ)ベンゼン、1,2,3−トリス(p−トルエンスルホニルオキシ)ベンゼン等のスルホン酸エステル誘導体。
有機溶剤の使用量は、ベース樹脂100部に対して200〜1,000部、特に400〜800部が好適である。
なお、塩基性化合物の配合量はベース樹脂100部に対して0.001〜2部、特に0.01〜1部が好適である。配合量が0.001部より少ないと配合効果がなく、2部を超えると感度が低下しすぎる場合がある。
IR(KBr):
ν=3311,2962,2949,2937,2871,2860,1699,1632,1470,1456,1441,1417,1387,1321,1284,1173,1155,1146,1084,1016,1004,980,946,908,843,820,761cm-1
1H−NMR(270MHz in CDCl3):
δ=1.20−1.55(4H,m),1.65−1.85(2H,m),1.93(3H,br.s),2.04(1H,m),2.18(1H,m),2.88(3H,s),3.37(1H,m),4.60−4.80(2H,m),5.60(1H,m),6.13(1H,m).
IR(KBr):
ν=3302,3266,3023,2948,2865,1720,1633,1448,1336,1319,1311,1294,1186,1155,1085,1024,987,939,902,817,763cm-1
1H−NMR(600MHz in CDCl3):
δ=1.43(2H,m),1.52(2H,m),1.91(3H,m),2.02(2H,m),2.08(2H,m),2.97(3H,s),3.35(1H,m),4.70−4.77(2H,m),5.53(1H,m),6.06(1H,m).
IR(KBr):
ν=3239,(br.),2944,2867,1700,1637,1454,1382,1319,1295,1232,1189,1153,1118,1081,1060,1012,964,937,611cm-1
1H−NMR(600MHz in CDCl3、主要異性体):
δ=1.40−1.55(3H,m),1.59(1H,m),1.70−1.90(3H,m),1.95−2.05(4H,m),3.72(1H,m),5.10(1H,ddd,J=5.5,2.8,2.8Hz),5.39(1H,br.d,J=8.9Hz),5.63(1H,m),6.14(1H,br.s)。
IR(KBr):
ν=3249,(br.),2950,2873,1710,1633,1456,1396,1376,1338,1307,1295,1228,1213,1186,1149,1122,1076,1004,971,962,948,781,734,605cm-1
1H−NMR(600MHz in CDCl3):
δ=1.37(2H,dddd,J=12.7,12.7,11.0Hz),1.66(1H,br.s),1.90−2.10(9H,m),3.59(1H,tt,J=11.0,4.3Hz),3.82(1H,tt,J=11.5,4.3Hz),5.64(1H,br.s),5.69(1H,q,J=1.5Hz).
実施例11で得られた重合体を用いて、以下に示す組成でレジスト材料を調製した。
(A)ベースポリマー(実施例11で得られた重合体)80部、
(B)酸発生剤として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1.0部、
(C)溶剤としてプロピレングリコールモノメチルエーテルアセテート480部、
(D)塩基性化合物としてトリエタノールアミン0.08部。
このレジスト材料を0.2μmのテフロン(登録商標)フィルターを用いて濾別した後、90℃、40秒間ヘキサメチルジシラザンを噴霧したシリコンウエハー上へ回転塗布し、110℃、90秒間の熱処理を施して、厚さ500nmのレジスト膜を形成した。これをArFエキシマレーザー光で露光し、110℃、90秒間の熱処理を施した後、23℃まで冷却し、2.38%のテトラメチルアンモニウムヒドロキシド水溶液を用いて、23℃、60秒間浸漬現像を行い、1:1のライン・アンド・スペース・パターンを形成した。現像済ウェハーを上空SEMで観察したところ、0.10μmのパターンまでパターン剥がれなく解像していることが確認された。このことから本発明のレジスト材料は優れた基板密着性及び解像性を有することが分かった。
実施例11で得た重合体1.0gをシクロヘキサノン6.0gに溶解したのち、0.2μmのテフロン(登録商標)フィルターを用いて濾過した。得られた溶液を石英基板上に回転塗布し、90℃、60秒間の熱処理を施して、膜厚500nmの薄膜を形成した。この薄膜について、紫外可視分光光度計を用いて193nmにおける透過率を測定したところ、500nmあたり80%の透過率であった。この結果から本発明の重合体はArFエキシマレーザー用フォトレジストベースポリマーとして充分な透明性を有することが確認された。
実施例11で得た重合体2gをシクロヘキサノン10gに溶解したのち、0.2μmのテフロン(登録商標)フィルターを用いて濾過した。得られた溶液をシリコンウエハー上に回転塗布し、90℃、60秒間の熱処理を施して、膜厚700nmの薄膜を形成した。この薄膜についてリアクティブイオンエッチング装置を用いて、Power100W、圧力5Pa、ガス流量30ml/minの条件でCF4ガスに対するエッチング速度を測定した。その結果、エッチング速度(ノボラックレジストを1.00として規格化した値)は1.13であった。一方、比較のためにKrFレジストのベースポリマーとして使用されているポリ(p−ヒドロキシスチレン)についても測定を行い、エッチング速度は1.20であった。この結果から本発明の重合体はCF4ガスに対するエッチング速度が遅く、ドライエッチング耐性に優れていることが確認された。
Claims (7)
- 重合体が、一般式(1a)、(2a)又は(3a)で示される繰り返し単位のモル分率が少なくとも5%であることを特徴とする請求項1乃至3のいずれか1項に記載のレジスト材料。
- (B)酸発生剤、(C)有機溶剤を含有することを特徴とする請求項1乃至4のいずれか1項に記載のレジスト材料。
- (B)酸発生剤、(C)有機溶剤、(D)塩基性化合物を含有することを特徴とする請求項1乃至4のいずれか1項に記載のレジスト材料。
- (1)請求項1乃至6のいずれか1項に記載のレジスト材料を基板上に塗布する工程、(2)次いで、加熱処理後、フォトマスクを介して波長300nm以下の高エネルギー線又は電子線で露光する工程、(3)加熱処理後、現像液を用いて現像する工程、を含むことを特徴とするパターン形成方法。
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