JP7484745B2 - レジスト材料及びパターン形成方法 - Google Patents
レジスト材料及びパターン形成方法 Download PDFInfo
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- 239000000463 material Substances 0.000 title claims description 91
- 238000000034 method Methods 0.000 title claims description 16
- -1 halide ion Chemical class 0.000 claims description 241
- 125000004432 carbon atom Chemical group C* 0.000 claims description 181
- 125000001183 hydrocarbyl group Chemical group 0.000 claims description 106
- 239000002253 acid Substances 0.000 claims description 91
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 62
- 229920006395 saturated elastomer Polymers 0.000 claims description 59
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 52
- 229910052731 fluorine Inorganic materials 0.000 claims description 48
- 125000001153 fluoro group Chemical group F* 0.000 claims description 47
- 229920005601 base polymer Polymers 0.000 claims description 44
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical class S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 claims description 41
- 125000005842 heteroatom Chemical group 0.000 claims description 38
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 36
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical group [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 claims description 32
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 claims description 32
- 125000000743 hydrocarbylene group Chemical group 0.000 claims description 32
- 229910052740 iodine Inorganic materials 0.000 claims description 30
- 125000004434 sulfur atom Chemical group 0.000 claims description 30
- 125000005843 halogen group Chemical group 0.000 claims description 28
- 125000000843 phenylene group Chemical group C1(=C(C=CC=C1)*)* 0.000 claims description 25
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical group [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 claims description 22
- 125000001931 aliphatic group Chemical group 0.000 claims description 22
- 125000002023 trifluoromethyl group Chemical group FC(F)(F)* 0.000 claims description 20
- 125000003118 aryl group Chemical group 0.000 claims description 18
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims description 18
- 229910052717 sulfur Inorganic materials 0.000 claims description 18
- 125000004093 cyano group Chemical group *C#N 0.000 claims description 16
- 239000003960 organic solvent Substances 0.000 claims description 16
- 230000005855 radiation Effects 0.000 claims description 16
- 125000005587 carbonate group Chemical group 0.000 claims description 15
- 150000008053 sultones Chemical group 0.000 claims description 14
- 229910052801 chlorine Inorganic materials 0.000 claims description 13
- 125000001309 chloro group Chemical group Cl* 0.000 claims description 13
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 12
- 229920002120 photoresistant polymer Polymers 0.000 claims description 11
- 125000003277 amino group Chemical group 0.000 claims description 10
- 125000004957 naphthylene group Chemical group 0.000 claims description 10
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- 239000004094 surface-active agent Substances 0.000 claims description 8
- 125000000816 ethylene group Chemical group [H]C([H])([*:1])C([H])([H])[*:2] 0.000 claims description 7
- 150000002500 ions Chemical class 0.000 claims description 7
- 150000003951 lactams Chemical group 0.000 claims description 7
- 125000005647 linker group Chemical group 0.000 claims description 7
- 239000000758 substrate Substances 0.000 claims description 7
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 claims description 6
- 229940124530 sulfonamide Drugs 0.000 claims description 6
- 125000001570 methylene group Chemical group [H]C([H])([*:1])[*:2] 0.000 claims description 5
- 230000000269 nucleophilic effect Effects 0.000 claims description 5
- UQSQSQZYBQSBJZ-UHFFFAOYSA-N fluorosulfonic acid Chemical compound OS(F)(=O)=O UQSQSQZYBQSBJZ-UHFFFAOYSA-N 0.000 claims description 4
- 125000000686 lactone group Chemical group 0.000 claims description 3
- 125000004122 cyclic group Chemical group 0.000 description 39
- 150000001450 anions Chemical class 0.000 description 25
- 150000001875 compounds Chemical class 0.000 description 21
- 125000004430 oxygen atom Chemical group O* 0.000 description 20
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- 238000009792 diffusion process Methods 0.000 description 17
- 150000001768 cations Chemical class 0.000 description 16
- XMBWDFGMSWQBCA-UHFFFAOYSA-N hydrogen iodide Chemical class I XMBWDFGMSWQBCA-UHFFFAOYSA-N 0.000 description 14
- 125000000217 alkyl group Chemical group 0.000 description 12
- 239000000178 monomer Substances 0.000 description 12
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- 239000000203 mixture Substances 0.000 description 11
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 10
- 150000002596 lactones Chemical group 0.000 description 10
- 229920000642 polymer Polymers 0.000 description 10
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- 238000011161 development Methods 0.000 description 8
- 230000018109 developmental process Effects 0.000 description 8
- VZXTWGWHSMCWGA-UHFFFAOYSA-N 1,3,5-triazine-2,4-diamine Chemical class NC1=NC=NC(N)=N1 VZXTWGWHSMCWGA-UHFFFAOYSA-N 0.000 description 7
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 7
- 229910052757 nitrogen Inorganic materials 0.000 description 7
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 6
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 6
- 125000003710 aryl alkyl group Chemical group 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 6
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 6
- 239000003431 cross linking reagent Substances 0.000 description 6
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 description 6
- 230000007423 decrease Effects 0.000 description 6
- 238000010511 deprotection reaction Methods 0.000 description 6
- SWXVUIWOUIDPGS-UHFFFAOYSA-N diacetone alcohol Chemical compound CC(=O)CC(C)(C)O SWXVUIWOUIDPGS-UHFFFAOYSA-N 0.000 description 6
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 6
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 6
- 238000006116 polymerization reaction Methods 0.000 description 6
- 150000003839 salts Chemical class 0.000 description 6
- WGTYBPLFGIVFAS-UHFFFAOYSA-M tetramethylammonium hydroxide Chemical compound [OH-].C[N+](C)(C)C WGTYBPLFGIVFAS-UHFFFAOYSA-M 0.000 description 6
- ARXJGSRGQADJSQ-UHFFFAOYSA-N 1-methoxypropan-2-ol Chemical compound COCC(C)O ARXJGSRGQADJSQ-UHFFFAOYSA-N 0.000 description 5
- YEJRWHAVMIAJKC-UHFFFAOYSA-N 4-Butyrolactone Chemical compound O=C1CCCO1 YEJRWHAVMIAJKC-UHFFFAOYSA-N 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 5
- 125000001246 bromo group Chemical group Br* 0.000 description 5
- 150000001244 carboxylic acid anhydrides Chemical class 0.000 description 5
- 238000004132 cross linking Methods 0.000 description 5
- 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 5
- 125000001511 cyclopentyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C1([H])[H] 0.000 description 5
- 238000000354 decomposition reaction Methods 0.000 description 5
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 5
- 125000001188 haloalkyl group Chemical group 0.000 description 5
- 239000003112 inhibitor Substances 0.000 description 5
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 5
- 125000002914 sec-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 5
- 150000003460 sulfonic acids Chemical group 0.000 description 5
- 238000003786 synthesis reaction Methods 0.000 description 5
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 5
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 5
- FRDAATYAJDYRNW-UHFFFAOYSA-N 3-methyl-3-pentanol Chemical compound CCC(C)(O)CC FRDAATYAJDYRNW-UHFFFAOYSA-N 0.000 description 4
- 239000000654 additive Substances 0.000 description 4
- 125000003342 alkenyl group Chemical group 0.000 description 4
- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 150000001735 carboxylic acids Chemical class 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 125000000596 cyclohexenyl group Chemical group C1(=CCCCC1)* 0.000 description 4
- 238000005516 engineering process 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
- 230000006870 function Effects 0.000 description 4
- CATSNJVOTSVZJV-UHFFFAOYSA-N heptan-2-one Chemical compound CCCCCC(C)=O CATSNJVOTSVZJV-UHFFFAOYSA-N 0.000 description 4
- 239000011630 iodine Substances 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
- 125000001280 n-hexyl group Chemical group C(CCCCC)* 0.000 description 4
- 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 4
- 125000001624 naphthyl group Chemical group 0.000 description 4
- 125000002868 norbornyl group Chemical group C12(CCC(CC1)C2)* 0.000 description 4
- 238000000059 patterning Methods 0.000 description 4
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 4
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 4
- UUGLSEIATNSHRI-UHFFFAOYSA-N 1,3,4,6-tetrakis(hydroxymethyl)-3a,6a-dihydroimidazo[4,5-d]imidazole-2,5-dione Chemical compound OCN1C(=O)N(CO)C2C1N(CO)C(=O)N2CO UUGLSEIATNSHRI-UHFFFAOYSA-N 0.000 description 3
- 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 3
- QQZOPKMRPOGIEB-UHFFFAOYSA-N 2-Oxohexane Chemical compound CCCCC(C)=O QQZOPKMRPOGIEB-UHFFFAOYSA-N 0.000 description 3
- QPRQEDXDYOZYLA-UHFFFAOYSA-N 2-methylbutan-1-ol Chemical compound CCC(C)CO QPRQEDXDYOZYLA-UHFFFAOYSA-N 0.000 description 3
- XMDHFACJUDGSLF-UHFFFAOYSA-N 2-naphthalen-1-ylethenol Chemical compound C1=CC=C2C(C=CO)=CC=CC2=C1 XMDHFACJUDGSLF-UHFFFAOYSA-N 0.000 description 3
- XLLXMBCBJGATSP-UHFFFAOYSA-N 2-phenylethenol Chemical compound OC=CC1=CC=CC=C1 XLLXMBCBJGATSP-UHFFFAOYSA-N 0.000 description 3
- 125000000094 2-phenylethyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])C([H])([H])* 0.000 description 3
- 125000003903 2-propenyl group Chemical group [H]C([*])([H])C([H])=C([H])[H] 0.000 description 3
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- SNRUBQQJIBEYMU-UHFFFAOYSA-N Dodecane Chemical group CCCCCCCCCCCC SNRUBQQJIBEYMU-UHFFFAOYSA-N 0.000 description 3
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical group [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 3
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 3
- 229920000877 Melamine resin Polymers 0.000 description 3
- DKGAVHZHDRPRBM-UHFFFAOYSA-N Tert-Butanol Chemical compound CC(C)(C)O DKGAVHZHDRPRBM-UHFFFAOYSA-N 0.000 description 3
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 3
- YGCOKJWKWLYHTG-UHFFFAOYSA-N [[4,6-bis[bis(hydroxymethyl)amino]-1,3,5-triazin-2-yl]-(hydroxymethyl)amino]methanol Chemical compound OCN(CO)C1=NC(N(CO)CO)=NC(N(CO)CO)=N1 YGCOKJWKWLYHTG-UHFFFAOYSA-N 0.000 description 3
- 125000005073 adamantyl group Chemical group C12(CC3CC(CC(C1)C3)C2)* 0.000 description 3
- 230000000996 additive effect Effects 0.000 description 3
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- 239000003513 alkali Substances 0.000 description 3
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- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 125000004210 cyclohexylmethyl group Chemical group [H]C([H])(*)C1([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C1([H])[H] 0.000 description 3
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- 238000005227 gel permeation chromatography Methods 0.000 description 3
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- 238000005342 ion exchange Methods 0.000 description 3
- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 description 3
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- 125000003367 polycyclic group Chemical group 0.000 description 3
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- FVAUCKIRQBBSSJ-UHFFFAOYSA-M sodium iodide Chemical compound [Na+].[I-] FVAUCKIRQBBSSJ-UHFFFAOYSA-M 0.000 description 3
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- BYEAHWXPCBROCE-UHFFFAOYSA-N 1,1,1,3,3,3-hexafluoropropan-2-ol Chemical group FC(F)(F)C(O)C(F)(F)F BYEAHWXPCBROCE-UHFFFAOYSA-N 0.000 description 2
- AKTDWFLTNDPLCH-UHFFFAOYSA-N 1,1,3,3-tetrakis(hydroxymethyl)urea Chemical compound OCN(CO)C(=O)N(CO)CO AKTDWFLTNDPLCH-UHFFFAOYSA-N 0.000 description 2
- QEGNUYASOUJEHD-UHFFFAOYSA-N 1,1-dimethylcyclohexane Chemical compound CC1(C)CCCCC1 QEGNUYASOUJEHD-UHFFFAOYSA-N 0.000 description 2
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- JOLQKTGDSGKSKJ-UHFFFAOYSA-N 1-ethoxypropan-2-ol Chemical compound CCOCC(C)O JOLQKTGDSGKSKJ-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
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- PFNHSEQQEPMLNI-UHFFFAOYSA-N 2-methyl-1-pentanol Chemical compound CCCC(C)CO PFNHSEQQEPMLNI-UHFFFAOYSA-N 0.000 description 2
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- 125000001622 2-naphthyl group Chemical group [H]C1=C([H])C([H])=C2C([H])=C(*)C([H])=C([H])C2=C1[H] 0.000 description 2
- ZPVFWPFBNIEHGJ-UHFFFAOYSA-N 2-octanone Chemical compound CCCCCCC(C)=O ZPVFWPFBNIEHGJ-UHFFFAOYSA-N 0.000 description 2
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- CPELXLSAUQHCOX-UHFFFAOYSA-M Bromide Chemical compound [Br-] CPELXLSAUQHCOX-UHFFFAOYSA-M 0.000 description 2
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- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- FBPFZTCFMRRESA-FSIIMWSLSA-N D-Glucitol Natural products OC[C@H](O)[C@H](O)[C@@H](O)[C@H](O)CO FBPFZTCFMRRESA-FSIIMWSLSA-N 0.000 description 2
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- 239000004593 Epoxy Substances 0.000 description 2
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- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 description 2
- AMQJEAYHLZJPGS-UHFFFAOYSA-N N-Pentanol Chemical compound CCCCCO AMQJEAYHLZJPGS-UHFFFAOYSA-N 0.000 description 2
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- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 2
- 125000002777 acetyl group Chemical group [H]C([H])([H])C(*)=O 0.000 description 2
- 125000003668 acetyloxy group Chemical group [H]C([H])([H])C(=O)O[*] 0.000 description 2
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- 238000006303 photolysis reaction Methods 0.000 description 1
- DFOXKPDFWGNLJU-UHFFFAOYSA-N pinacolyl alcohol Chemical compound CC(O)C(C)(C)C DFOXKPDFWGNLJU-UHFFFAOYSA-N 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 239000003505 polymerization initiator Substances 0.000 description 1
- 150000003139 primary aliphatic amines Chemical class 0.000 description 1
- 150000003141 primary amines Chemical class 0.000 description 1
- ILVGAIQLOCKNQA-UHFFFAOYSA-N propyl 2-hydroxypropanoate Chemical compound CCCOC(=O)C(C)O ILVGAIQLOCKNQA-UHFFFAOYSA-N 0.000 description 1
- 229940090181 propyl acetate Drugs 0.000 description 1
- 125000002568 propynyl group Chemical group [*]C#CC([H])([H])[H] 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000007870 radical polymerization initiator Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000012487 rinsing solution Substances 0.000 description 1
- CVHZOJJKTDOEJC-UHFFFAOYSA-N saccharin Chemical compound C1=CC=C2C(=O)NS(=O)(=O)C2=C1 CVHZOJJKTDOEJC-UHFFFAOYSA-N 0.000 description 1
- 229940081974 saccharin Drugs 0.000 description 1
- 235000019204 saccharin Nutrition 0.000 description 1
- 239000000901 saccharin and its Na,K and Ca salt Substances 0.000 description 1
- 125000005930 sec-butyloxycarbonyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(OC(*)=O)C([H])([H])[H] 0.000 description 1
- 150000005619 secondary aliphatic amines Chemical class 0.000 description 1
- 150000003335 secondary amines Chemical class 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 235000009518 sodium iodide Nutrition 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000004528 spin coating Methods 0.000 description 1
- 125000004079 stearyl 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])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 230000001629 suppression Effects 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
- 125000005931 tert-butyloxycarbonyl group Chemical group [H]C([H])([H])C(OC(*)=O)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 150000003510 tertiary aliphatic amines 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
- 125000003718 tetrahydrofuranyl group Chemical group 0.000 description 1
- LPSKDVINWQNWFE-UHFFFAOYSA-M tetrapropylazanium;hydroxide Chemical compound [OH-].CCC[N+](CCC)(CCC)CCC LPSKDVINWQNWFE-UHFFFAOYSA-M 0.000 description 1
- 125000001544 thienyl group Chemical group 0.000 description 1
- 125000003396 thiol group Chemical group [H]S* 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 description 1
- ZFDIRQKJPRINOQ-UHFFFAOYSA-N transbutenic acid ethyl ester Natural products CCOC(=O)C=CC ZFDIRQKJPRINOQ-UHFFFAOYSA-N 0.000 description 1
- NQPDZGIKBAWPEJ-UHFFFAOYSA-N valeric acid Chemical compound CCCCC(O)=O NQPDZGIKBAWPEJ-UHFFFAOYSA-N 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
- 125000005023 xylyl group Chemical group 0.000 description 1
Classifications
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- C07D—HETEROCYCLIC COMPOUNDS
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- C07D275/04—Heterocyclic compounds containing 1,2-thiazole or hydrogenated 1,2-thiazole rings condensed with carbocyclic rings or ring systems
- C07D275/06—Heterocyclic compounds containing 1,2-thiazole or hydrogenated 1,2-thiazole rings condensed with carbocyclic rings or ring systems with hetero atoms directly attached to the ring sulfur atom
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- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
- G03F7/0045—Photosensitive materials with organic non-macromolecular light-sensitive compounds not otherwise provided for, e.g. dissolution inhibitors
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- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
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- C07C205/57—Compounds containing nitro groups bound to a carbon skeleton the carbon skeleton being further substituted by carboxyl groups having nitro groups and carboxyl groups bound to carbon atoms of six-membered aromatic rings of the carbon skeleton
- C07C205/58—Compounds containing nitro groups bound to a carbon skeleton the carbon skeleton being further substituted by carboxyl groups having nitro groups and carboxyl groups bound to carbon atoms of six-membered aromatic rings of the carbon skeleton the carbon skeleton being further substituted by halogen atoms
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- C07C309/02—Sulfonic acids having sulfo groups bound to acyclic carbon atoms
- C07C309/19—Sulfonic acids having sulfo groups bound to acyclic carbon atoms of a saturated carbon skeleton containing rings
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- C07C311/01—Sulfonamides having sulfur atoms of sulfonamide groups bound to acyclic carbon atoms
- C07C311/02—Sulfonamides having sulfur atoms of sulfonamide groups bound to acyclic carbon atoms of an acyclic saturated carbon skeleton
- C07C311/03—Sulfonamides having sulfur atoms of sulfonamide groups bound to acyclic carbon atoms of an acyclic saturated carbon skeleton having the nitrogen atoms of the sulfonamide groups bound to hydrogen atoms or to acyclic carbon atoms
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- C07C381/12—Sulfonium compounds
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- C07C59/00—Compounds having carboxyl groups bound to acyclic carbon atoms and containing any of the groups OH, O—metal, —CHO, keto, ether, groups, groups, or groups
- C07C59/01—Saturated compounds having only one carboxyl group and containing hydroxy or O-metal groups
- C07C59/115—Saturated compounds having only one carboxyl group and containing hydroxy or O-metal groups containing halogen
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- C07C61/125—Saturated polycyclic compounds having a carboxyl group bound to a condensed ring system
- C07C61/135—Saturated polycyclic compounds having a carboxyl group bound to a condensed ring system having three rings
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- C07C63/68—Compounds having carboxyl groups bound to a carbon atoms of six-membered aromatic rings containing halogen
- C07C63/70—Monocarboxylic acids
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- C07C65/00—Compounds having carboxyl groups bound to carbon atoms of six—membered aromatic rings and containing any of the groups OH, O—metal, —CHO, keto, ether, groups, groups, or groups
- C07C65/01—Compounds having carboxyl groups bound to carbon atoms of six—membered aromatic rings and containing any of the groups OH, O—metal, —CHO, keto, ether, groups, groups, or groups containing hydroxy or O-metal groups
- C07C65/03—Compounds having carboxyl groups bound to carbon atoms of six—membered aromatic rings and containing any of the groups OH, O—metal, —CHO, keto, ether, groups, groups, or groups containing hydroxy or O-metal groups monocyclic and having all hydroxy or O-metal groups bound to the ring
- C07C65/05—Compounds having carboxyl groups bound to carbon atoms of six—membered aromatic rings and containing any of the groups OH, O—metal, —CHO, keto, ether, groups, groups, or groups containing hydroxy or O-metal groups monocyclic and having all hydroxy or O-metal groups bound to the ring o-Hydroxy carboxylic acids
- C07C65/10—Salicylic acid
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- C08F212/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring
- C08F212/02—Monomers containing only one unsaturated aliphatic radical
- C08F212/04—Monomers containing only one unsaturated aliphatic radical containing one ring
- C08F212/14—Monomers containing only one unsaturated aliphatic radical containing one ring substituted by heteroatoms or groups containing heteroatoms
- C08F212/22—Oxygen
- C08F212/24—Phenols or alcohols
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- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
- C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
- C08F220/1806—C6-(meth)acrylate, e.g. (cyclo)hexyl (meth)acrylate or phenyl (meth)acrylate
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D125/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Coating compositions based on derivatives of such polymers
- C09D125/18—Homopolymers or copolymers of aromatic monomers containing elements other than carbon and hydrogen
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- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
- G03F7/038—Macromolecular compounds which are rendered insoluble or differentially wettable
- G03F7/0382—Macromolecular compounds which are rendered insoluble or differentially wettable the macromolecular compound being present in a chemically amplified negative photoresist composition
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- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
- G03F7/038—Macromolecular compounds which are rendered insoluble or differentially wettable
- G03F7/0384—Macromolecular compounds which are rendered insoluble or differentially wettable with ethylenic or acetylenic bands in the main chain of the photopolymer
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- G03F7/004—Photosensitive materials
- G03F7/039—Macromolecular compounds which are photodegradable, e.g. positive electron resists
- G03F7/0392—Macromolecular compounds which are photodegradable, e.g. positive electron resists the macromolecular compound being present in a chemically amplified positive photoresist composition
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- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
- G03F7/039—Macromolecular compounds which are photodegradable, e.g. positive electron resists
- G03F7/0392—Macromolecular compounds which are photodegradable, e.g. positive electron resists the macromolecular compound being present in a chemically amplified positive photoresist composition
- G03F7/0397—Macromolecular compounds which are photodegradable, e.g. positive electron resists the macromolecular compound being present in a chemically amplified positive photoresist composition the macromolecular compound having an alicyclic moiety in a side chain
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- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/20—Exposure; Apparatus therefor
- G03F7/2002—Exposure; Apparatus therefor with visible light or UV light, through an original having an opaque pattern on a transparent support, e.g. film printing, projection printing; by reflection of visible or UV light from an original such as a printed image
- G03F7/2004—Exposure; Apparatus therefor with visible light or UV light, through an original having an opaque pattern on a transparent support, e.g. film printing, projection printing; by reflection of visible or UV light from an original such as a printed image characterised by the use of a particular light source, e.g. fluorescent lamps or deep UV light
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Description
1.下記式(A)で表されるスルホニウム塩を含むクエンチャーを含むレジスト材料。
XBIは、ヨウ素原子又は臭素原子である。
Ralは、炭素数1~20の(k+1)価の脂肪族炭化水素基であり、エーテル結合、カルボニル基、エステル結合、アミド結合、スルトン環、ラクタム環、カーボネート基、ヨウ素原子以外のハロゲン原子、炭素数6~12のアリール基、ヒドロキシ基及びカルボキシ基から選ばれる少なくとも1種を含んでいてもよい。
X1は、単結合、エーテル結合、エステル結合、アミド結合、カルボニル基又はカーボネート基である。
X2は、単結合又は炭素数1~20の(m+1)価の炭化水素基であり、エーテル結合、カルボニル基、エステル結合、アミド結合、スルトン環、ラクタム環、カーボネート基、ヨウ素原子以外のハロゲン原子、ヒドロキシ基及びカルボキシ基から選ばれる少なくとも1種を含んでいてもよい。
X3は、単結合、エーテル結合又はエステル結合である。
R1は、単結合、又はエーテル結合、エステル結合若しくはヒドロキシ基を含んでいてもよい炭素数1~20の飽和ヒドロカルビレン基である。
R2は、ヘテロ原子を含んでいてもよい炭素数1~20のヒドロカルビル基である。r=1のとき、2つのR2は、互いに同一でも異なっていてもよく、互いに結合してこれらが結合する硫黄原子と共に環を形成してもよい。
R3は、ヒドロキシ基、カルボキシ基、ニトロ基、シアノ基、フッ素原子、塩素原子、臭素原子、ヨウ素原子、アミノ基、若しくはフッ素原子、塩素原子、臭素原子、ヨウ素原子、ヒドロキシ基、アミノ基若しくはエーテル結合を含んでいてもよい、炭素数1~20の飽和ヒドロカルビル基、炭素数1~20の飽和ヒドロカルビルオキシ基、炭素数2~20の飽和ヒドロカルビルカルボニルオキシ基、炭素数2~20の飽和ヒドロカルビルオキシカルボニル基又は炭素数1~4の飽和ヒドロカルビルスルホニルオキシ基である。
Xq-は、ハロゲン化物イオン、α位にフッ素原子を有しないスルホン酸アニオン、カルボン酸アニオン又はスルホンアミドアニオンである。)
2.更に、有機溶剤を含む1のレジスト材料。
3.更に、フルオロスルホン酸、フルオロイミド酸又はフルオロメチド酸を発生する酸発生剤を含む1又は2のレジスト材料。
4.更に、ベースポリマーを含む1~3のいずれかのレジスト材料。
5.前記ベースポリマーが、下記式(a1)で表される繰り返し単位又は下記式(a2)で表される繰り返し単位を含むものである4のレジスト材料。
Y1は、単結合、フェニレン基若しくはナフチレン基、又はエステル結合若しくはラクトン環から選ばれる少なくとも1種を含む炭素数1~12の連結基である。
Y2は、単結合又はエステル結合である。
Y3は、単結合、エーテル結合又はエステル結合である。
R11及びR12は、それぞれ独立に、酸不安定基である。
R13は、フッ素原子、トリフルオロメチル基、シアノ基、炭素数1~6の飽和ヒドロカルビル基、炭素数1~6の飽和ヒドロカルビルオキシ基、炭素数2~7の飽和ヒドロカルビルカルボニル基、炭素数2~7の飽和ヒドロカルビルカルボニルオキシ基又は炭素数2~7の飽和ヒドロカルビルオキシカルボニル基である。
R14は、単結合又は炭素数1~6のアルカンジイル基であり、その炭素原子の一部がエーテル結合又はエステル結合で置換されていてもよい。
aは、1又は2である。bは、0~4の整数である。ただし、1≦a+b≦5である。)
6.化学増幅ポジ型レジスト材料である5のレジスト材料。
7.前記ベースポリマーが、酸不安定基を含まないものである4のレジスト材料。
8.化学増幅ネガ型レジスト材料である7のレジスト材料。
9.前記ベースポリマーが、下記式(f1)~(f3)のいずれかで表される繰り返し単位を含む1~8のいずれかのレジスト材料。
Z1は、単結合、炭素数1~6の脂肪族ヒドロカルビレン基、フェニレン基、ナフチレン基若しくはこれらを組み合わせて得られる炭素数7~18の基、又は-O-Z11-、-C(=O)-O-Z11-若しくは-C(=O)-NH-Z11-である。Z11は、炭素数1~6の脂肪族ヒドロカルビレン基、フェニレン基、ナフチレン基又はこれらを組み合わせて得られる炭素数7~18の基であり、カルボニル基、エステル結合、エーテル結合又はヒドロキシ基を含んでいてもよい。
Z2は、単結合、-Z21-C(=O)-O-、-Z21-O-又は-Z21-O-C(=O)-である。Z21は、炭素数1~12の飽和ヒドロカルビレン基であり、カルボニル基、エステル結合又はエーテル結合を含んでいてもよい。
Z3は、単結合、メチレン基、エチレン基、フェニレン基、フッ素化フェニレン基、-O-Z31-、-C(=O)-O-Z31-又は-C(=O)-NH-Z31-である。Z31は、炭素数1~6の脂肪族ヒドロカルビレン基、フェニレン基、フッ素化フェニレン基、又はトリフルオロメチル基で置換されたフェニレン基であり、カルボニル基、エステル結合、エーテル結合又はヒドロキシ基を含んでいてもよい。
R21~R28は、それぞれ独立に、ハロゲン原子、又はヘテロ原子を含んでいてもよい炭素数1~20のヒドロカルビル基である。また、R23及びR24又はR26及びR27が、互いに結合してこれらが結合する硫黄原子と共に環を形成していてもよい。
RHFは、水素原子又はトリフルオロメチル基である。
M-は、非求核性対向イオンである。)
10.更に、界面活性剤を含む1~9のいずれかのレジスト材料。
11.1~10のいずれかのレジスト材料を用いて基板上にレジスト膜を形成する工程と、前記レジスト膜を高エネルギー線で露光する工程と、前記露光したレジスト膜を、現像液を用いて現像する工程とを含むパターン形成方法。
12.前記高エネルギー線が、波長193nmのArFエキシマレーザー光又は波長248nmのKrFエキシマレーザー光である11のパターン形成方法。
13.前記高エネルギー線が、EB又は波長3~15nmのEUVである11のパターン形成方法。
本発明のレジスト材料は、式(A)で表されるスルホニウム塩を含み、場合によってはベースポリマーを含む。前記スルホニウム塩は、光照射によってそのカチオンが分解してアニオンの酸を発生する酸発生剤であるが、アニオンが弱酸に由来するものであるため、これによって極性変換や架橋反応が起こることはない。別に添加されている強酸を発生する酸発生剤から発生した強酸とイオン交換することによって、強酸を中和させるクエンチャーとして機能する。このようなスルホニウム塩型のクエンチャーは、特許文献4と同様の機構によって酸をトラップし、酸の拡散を制御し、クエンチャーの光分解によってコントラストが向上する。
られる。
本発明のレジスト材料に含まれるベースポリマーは、ポジ型レジスト材料の場合、酸不安定基を含む繰り返し単位を含む。酸不安定基を含む繰り返し単位としては、下記式(a1)で表される繰り返し単位(以下、繰り返し単位a1ともいう。)又は下記式(a2)で表される繰り返し単位(以下、繰り返し単位a2ともいう。)が好ましい。
本発明のレジスト材料は、ポジ型レジスト材料の脱保護反応やネガ型レジスト材料の極性変化反応又は架橋反応を引き起こす強酸を発生させる酸発生剤(以下、添加型酸発生剤ともいう。)を含んでもよい。前記添加型酸発生剤としては、活性光線又は放射線に感応して酸を発生する化合物(光酸発生剤)が挙げられる。光酸発生剤としては、高エネルギー線照射により酸を発生する化合物であればいずれでも構わないが、フルオロスルホン酸、フルオロイミド酸又はフルオロメチド酸を発生する酸発生剤が好ましい。好適な光酸発生剤としてはスルホニウム塩、ヨードニウム塩、スルホニルジアゾメタン、N-スルホニルオキシイミド、オキシム-O-スルホネート型酸発生剤等が挙げられる。
本発明のレジスト材料は、有機溶剤を含んでもよい。前記有機溶剤は、前述した各成分及び後述する各成分が溶解可能なものであれば、特に限定されない。前記有機溶剤としては、特開2008-111103号公報の段落[0144]~[0145]に記載の、シクロヘキサノン、シクロペンタノン、メチル-2-n-ペンチルケトン、2-ヘプタノン等のケトン類、3-メトキシブタノール、3-メチル-3-メトキシブタノール、1-メトキシ-2-プロパノール、1-エトキシ-2-プロパノール、ジアセトンアルコール等のアルコール類、プロピレングリコールモノメチルエーテル、エチ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、エチ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ジメチルエーテル、ジエチレングリコールジメチルエーテル等のエーテル類、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、乳酸エチル、ピルビン酸エチル、酢酸ブチル、3-メ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、酢酸tert-ブチル、プロピオン酸tert-ブチル、プロピレングリコールモノtert-ブチルエーテルアセテート等のエステル類、γ-ブチロラクトン等のラクトン類、これらの混合溶剤等が挙げられる。
前述した成分に加えて、式(A)で表されるスルホニウム塩以外のクエンチャー(以下、その他のクエンチャーともいう。)、界面活性剤、溶解阻止剤、架橋剤等を目的に応じて適宜組み合わせて配合してポジ型レジスト材料及びネガ型レジスト材料を構成することによって、露光部では前記ベースポリマーが触媒反応により現像液に対する溶解速度が加速されるので、極めて高感度のポジ型レジスト材料及びネガ型レジスト材料とすることができる。この場合、レジスト膜の溶解コントラスト及び解像性が高く、露光余裕度があり、プロセス適応性に優れ、露光後のパターン形状が良好でありながら、特に酸拡散を抑制できることから粗密寸法差が小さく、これらのことから実用性が高く、超LSI用レジスト材料として非常に有効なものとすることができる。特に、酸触媒反応を利用した化学増幅ポジ型レジスト材料とすると、より高感度のものとすることができるとともに、諸特性が一層優れたものとなり極めて有用なものとなる。
本発明のレジスト材料を種々の集積回路製造に用いる場合は、公知のリソグラフィー技術を適用することができる。例えば、パターン形成方法としては、前述したレジスト材料を用いて基板上にレジスト膜を形成する工程と、前記レジスト膜を高エネルギー線で露光する工程と、露光したレジスト膜を、現像液を用いて現像する工程とを含む方法が挙げられる。
各モノマーを組み合わせてTHF中で共重合反応を行い、メタノールに晶出し、更にヘキサンで洗浄を繰り返した後、単離し、乾燥させて、以下に示す組成のベースポリマー(ポリマー1~4)を得た。得られたベースポリマーの組成は1H-NMRにより、Mw及びMw/MnはGPC(溶剤:THF、標準:ポリスチレン)により確認した。
(1)レジスト材料の調製
界面活性剤としてオムノバ社製PolyFox PF-636を100ppm溶解させた溶剤に、表1~3に示す組成で各成分を溶解させた溶液を、0.2μmサイズのフィルターで濾過してレジスト材料を調製した。なお、実施例1~14、実施例16~29及び比較例1~3のレジスト材料はポジ型であり、実施例15及び比較例4のレジスト材料はネガ型である。
・有機溶剤:PGMEA(プロピレングリコールモノメチルエーテルアセテート)
GBL(γ-ブチロラクトン)
CyH(シクロヘキサノン)
PGME(プロピレングリコールモノメチルエーテル)
DAA(ジアセトンアルコール)
表1~3に示す各レジスト材料を、信越化学工業(株)製ケイ素含有スピンオンハードマスクSHB-A940(ケイ素の含有量が43質量%)を膜厚20nmで形成したSi基板上にスピンコートし、ホットプレートを用いて105℃で60秒間プリベークして膜厚50nmのレジスト膜を作製した。これを、ASML社製EUVスキャナーNXE3300(NA0.33、σ0.9/0.6、クアドルポール照明、ウエハー上寸法がピッチ46nm、+20%バイアスのホールパターンのマスク)を用いて露光し、ホットプレート上で表1~3記載の温度で60秒間PEBを行い、2.38質量%TMAH水溶液で30秒間現像を行って、実施例1~14、実施例16~29及び比較例1~3では寸法23nmのホールパターンを、実施例15及び比較例4では寸法26nmのドットパターンを得た。
ホール及びドット寸法がそれぞれ23nm及び26nmで形成されるときの露光量を測定して、これを感度とした。また、(株)日立ハイテクノロジーズ製測長SEM(CG-5000)を用いてホール50個及びドット50個の寸法を測定し、その結果から算出した標準偏差(σ)の3倍値(3σ)を寸法バラツキ(CDU)とした。
結果を表1~3に併記する。
Claims (13)
- 下記式(A)で表されるスルホニウム塩を含むクエンチャーを含むレジスト材料。
XBIは、ヨウ素原子又は臭素原子である。
Ralは、炭素数1~20の(k+1)価の脂肪族炭化水素基であり、エーテル結合、カルボニル基、エステル結合、アミド結合、スルトン環、ラクタム環、カーボネート基、ヨウ素原子以外のハロゲン原子、炭素数6~12のアリール基、ヒドロキシ基及びカルボキシ基から選ばれる少なくとも1種を含んでいてもよい。
X1は、単結合、エーテル結合、エステル結合、アミド結合、カルボニル基又はカーボネート基である。
X2は、単結合又は炭素数1~20の(m+1)価の炭化水素基であり、エーテル結合、カルボニル基、エステル結合、アミド結合、スルトン環、ラクタム環、カーボネート基、ヨウ素原子以外のハロゲン原子、ヒドロキシ基及びカルボキシ基から選ばれる少なくとも1種を含んでいてもよい。
X3は、単結合、エーテル結合又はエステル結合である。
R1は、単結合、又はエーテル結合、エステル結合若しくはヒドロキシ基を含んでいてもよい炭素数1~20の飽和ヒドロカルビレン基である。
R2は、ヘテロ原子を含んでいてもよい炭素数1~20のヒドロカルビル基である。r=1のとき、2つのR2は、互いに同一でも異なっていてもよく、互いに結合してこれらが結合する硫黄原子と共に環を形成してもよい。
R3は、ヒドロキシ基、カルボキシ基、ニトロ基、シアノ基、フッ素原子、塩素原子、臭素原子、ヨウ素原子、アミノ基、若しくはフッ素原子、塩素原子、臭素原子、ヨウ素原子、ヒドロキシ基、アミノ基若しくはエーテル結合を含んでいてもよい、炭素数1~20の飽和ヒドロカルビル基、炭素数1~20の飽和ヒドロカルビルオキシ基、炭素数2~20の飽和ヒドロカルビルカルボニルオキシ基、炭素数2~20の飽和ヒドロカルビルオキシカルボニル基又は炭素数1~4の飽和ヒドロカルビルスルホニルオキシ基である。
Xq-は、ハロゲン化物イオン、α位にフッ素原子を有しないスルホン酸アニオン、カルボン酸アニオン又はスルホンアミドアニオンである。) - 更に、有機溶剤を含む請求項1記載のレジスト材料。
- 更に、フルオロスルホン酸、フルオロイミド酸又はフルオロメチド酸を発生する酸発生剤を含む請求項1又は2記載のレジスト材料。
- 更に、ベースポリマーを含む請求項1~3のいずれか1項記載のレジスト材料。
- 前記ベースポリマーが、下記式(a1)で表される繰り返し単位又は下記式(a2)で表される繰り返し単位を含むものである請求項4記載のレジスト材料。
Y1は、単結合、フェニレン基若しくはナフチレン基、又はエステル結合若しくはラクトン環から選ばれる少なくとも1種を含む炭素数1~12の連結基である。
Y2は、単結合又はエステル結合である。
Y3は、単結合、エーテル結合又はエステル結合である。
R11及びR12は、それぞれ独立に、酸不安定基である。
R13は、フッ素原子、トリフルオロメチル基、シアノ基、炭素数1~6の飽和ヒドロカルビル基、炭素数1~6の飽和ヒドロカルビルオキシ基、炭素数2~7の飽和ヒドロカルビルカルボニル基、炭素数2~7の飽和ヒドロカルビルカルボニルオキシ基又は炭素数2~7の飽和ヒドロカルビルオキシカルボニル基である。
R14は、単結合又は炭素数1~6のアルカンジイル基であり、その炭素原子の一部がエーテル結合又はエステル結合で置換されていてもよい。
aは、1又は2である。bは、0~4の整数である。ただし、1≦a+b≦5である。) - 化学増幅ポジ型レジスト材料である請求項5記載のレジスト材料。
- 前記ベースポリマーが、酸不安定基を含まないものである請求項4記載のレジスト材料。
- 化学増幅ネガ型レジスト材料である請求項7記載のレジスト材料。
- 前記ベースポリマーが、下記式(f1)~(f3)のいずれかで表される繰り返し単位を含む請求項4~8のいずれか1項記載のレジスト材料。
Z1は、単結合、炭素数1~6の脂肪族ヒドロカルビレン基、フェニレン基、ナフチレン基若しくはこれらを組み合わせて得られる炭素数7~18の基、又は-O-Z11-、-C(=O)-O-Z11-若しくは-C(=O)-NH-Z11-である。Z11は、炭素数1~6の脂肪族ヒドロカルビレン基、フェニレン基、ナフチレン基又はこれらを組み合わせて得られる炭素数7~18の基であり、カルボニル基、エステル結合、エーテル結合又はヒドロキシ基を含んでいてもよい。
Z2は、単結合、-Z21-C(=O)-O-、-Z21-O-又は-Z21-O-C(=O)-である。Z21は、炭素数1~12の飽和ヒドロカルビレン基であり、カルボニル基、エステル結合又はエーテル結合を含んでいてもよい。
Z3は、単結合、メチレン基、エチレン基、フェニレン基、フッ素化フェニレン基、-O-Z31-、-C(=O)-O-Z31-又は-C(=O)-NH-Z31-である。Z31は、炭素数1~6の脂肪族ヒドロカルビレン基、フェニレン基、フッ素化フェニレン基、又はトリフルオロメチル基で置換されたフェニレン基であり、カルボニル基、エステル結合、エーテル結合又はヒドロキシ基を含んでいてもよい。
R21~R28は、それぞれ独立に、ハロゲン原子、又はヘテロ原子を含んでいてもよい炭素数1~20のヒドロカルビル基である。また、R23及びR24又はR26及びR27が、互いに結合してこれらが結合する硫黄原子と共に環を形成していてもよい。
RHFは、水素原子又はトリフルオロメチル基である。
M-は、非求核性対向イオンである。) - 更に、界面活性剤を含む請求項1~9のいずれか1項記載のレジスト材料。
- 請求項1~10のいずれか1項記載のレジスト材料を用いて基板上にレジスト膜を形成する工程と、前記レジスト膜を高エネルギー線で露光する工程と、前記露光したレジスト膜を、現像液を用いて現像する工程とを含むパターン形成方法。
- 前記高エネルギー線が、波長193nmのArFエキシマレーザー光又は波長248nmのKrFエキシマレーザー光である請求項11記載のパターン形成方法。
- 前記高エネルギー線が、電子線又は波長3~15nmの極端紫外線である請求項11記載のパターン形成方法。
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