JP5861336B2 - 重合体、およびそれを含むレジスト材料、ならびにそれを用いるパターン形成方法 - Google Patents
重合体、およびそれを含むレジスト材料、ならびにそれを用いるパターン形成方法 Download PDFInfo
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- JP5861336B2 JP5861336B2 JP2011194890A JP2011194890A JP5861336B2 JP 5861336 B2 JP5861336 B2 JP 5861336B2 JP 2011194890 A JP2011194890 A JP 2011194890A JP 2011194890 A JP2011194890 A JP 2011194890A JP 5861336 B2 JP5861336 B2 JP 5861336B2
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- 229920000642 polymer Polymers 0.000 title claims description 101
- 239000000463 material Substances 0.000 title claims description 95
- 238000000034 method Methods 0.000 title claims description 88
- -1 tert-amyloxycarbonyl Group Chemical group 0.000 claims description 202
- 229910052731 fluorine Inorganic materials 0.000 claims description 56
- 125000004432 carbon atom Chemical group C* 0.000 claims description 53
- 239000002904 solvent Substances 0.000 claims description 53
- 239000002253 acid Substances 0.000 claims description 39
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 37
- 238000000059 patterning Methods 0.000 claims description 32
- 239000000758 substrate Substances 0.000 claims description 32
- 239000000178 monomer Substances 0.000 claims description 27
- 125000001153 fluoro group Chemical group F* 0.000 claims description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 23
- 125000000217 alkyl group Chemical group 0.000 claims description 22
- 125000004122 cyclic group Chemical group 0.000 claims description 21
- 238000000671 immersion lithography Methods 0.000 claims description 17
- 229910052799 carbon Inorganic materials 0.000 claims description 16
- 125000002023 trifluoromethyl group Chemical group FC(F)(F)* 0.000 claims description 15
- 150000003839 salts Chemical class 0.000 claims description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 13
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 13
- 125000004430 oxygen atom Chemical group O* 0.000 claims description 12
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 11
- 125000005843 halogen group Chemical group 0.000 claims description 11
- 230000007261 regionalization Effects 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 10
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 9
- 150000007514 bases Chemical class 0.000 claims description 9
- 125000000753 cycloalkyl group Chemical group 0.000 claims description 9
- 229930195733 hydrocarbon Natural products 0.000 claims description 9
- 238000001900 extreme ultraviolet lithography Methods 0.000 claims description 8
- 239000004215 Carbon black (E152) Substances 0.000 claims description 7
- 239000003960 organic solvent Substances 0.000 claims description 7
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 claims description 6
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical group COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 5
- 125000003718 tetrahydrofuranyl group Chemical group 0.000 claims description 5
- 229910014033 C-OH Inorganic materials 0.000 claims description 4
- 229910014570 C—OH Inorganic materials 0.000 claims description 4
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical group CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 claims description 4
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 claims description 4
- 125000004184 methoxymethyl group Chemical group [H]C([H])([H])OC([H])([H])* 0.000 claims description 4
- 125000001412 tetrahydropyranyl group Chemical group 0.000 claims description 4
- 125000004632 tetrahydrothiopyranyl group Chemical group S1C(CCCC1)* 0.000 claims description 3
- VLSRKCIBHNJFHA-UHFFFAOYSA-N 2-(trifluoromethyl)prop-2-enoic acid Chemical group OC(=O)C(=C)C(F)(F)F VLSRKCIBHNJFHA-UHFFFAOYSA-N 0.000 claims description 2
- 125000003821 2-(trimethylsilyl)ethoxymethyl group Chemical group [H]C([H])([H])[Si](C([H])([H])[H])(C([H])([H])[H])C([H])([H])C(OC([H])([H])[*])([H])[H] 0.000 claims description 2
- 125000005073 adamantyl group Chemical group C12(CC3CC(CC(C1)C3)C2)* 0.000 claims description 2
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims description 2
- 125000005931 tert-butyloxycarbonyl group Chemical group [H]C([H])([H])C(OC(*)=O)(C([H])([H])[H])C([H])([H])[H] 0.000 claims description 2
- 230000000379 polymerizing effect Effects 0.000 claims 1
- 239000010408 film Substances 0.000 description 52
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 37
- 239000011737 fluorine Substances 0.000 description 37
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 description 31
- 239000000243 solution Substances 0.000 description 29
- 125000001424 substituent group Chemical group 0.000 description 29
- 239000000203 mixture Substances 0.000 description 28
- 238000001459 lithography Methods 0.000 description 25
- 238000006243 chemical reaction Methods 0.000 description 22
- 235000012431 wafers Nutrition 0.000 description 19
- 239000002244 precipitate Substances 0.000 description 18
- 150000002430 hydrocarbons Chemical class 0.000 description 17
- 229920005989 resin Polymers 0.000 description 16
- 239000011347 resin Substances 0.000 description 16
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 15
- WVYWICLMDOOCFB-UHFFFAOYSA-N 4-methyl-2-pentanol Chemical compound CC(C)CC(C)O WVYWICLMDOOCFB-UHFFFAOYSA-N 0.000 description 15
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 15
- 238000006116 polymerization reaction Methods 0.000 description 15
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical group [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 14
- LZCLXQDLBQLTDK-UHFFFAOYSA-N ethyl 2-hydroxypropanoate Chemical compound CCOC(=O)C(C)O LZCLXQDLBQLTDK-UHFFFAOYSA-N 0.000 description 14
- 229910052710 silicon Inorganic materials 0.000 description 14
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Natural products C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 13
- 239000000853 adhesive Substances 0.000 description 13
- 230000001070 adhesive effect Effects 0.000 description 13
- 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 12
- 125000004429 atom Chemical group 0.000 description 12
- 150000001875 compounds Chemical class 0.000 description 12
- 150000002148 esters Chemical group 0.000 description 12
- 230000008569 process Effects 0.000 description 12
- KBPLFHHGFOOTCA-UHFFFAOYSA-N 1-Octanol Chemical compound CCCCCCCCO KBPLFHHGFOOTCA-UHFFFAOYSA-N 0.000 description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 11
- 125000003118 aryl group Chemical group 0.000 description 11
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 11
- 229920001577 copolymer Polymers 0.000 description 11
- 125000000524 functional group Chemical group 0.000 description 11
- 238000005259 measurement Methods 0.000 description 11
- 239000010703 silicon Substances 0.000 description 11
- 239000007787 solid Substances 0.000 description 11
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 10
- 239000011521 glass Substances 0.000 description 10
- 125000000962 organic group Chemical group 0.000 description 10
- ARXJGSRGQADJSQ-UHFFFAOYSA-N 1-methoxypropan-2-ol Chemical compound COCC(C)O ARXJGSRGQADJSQ-UHFFFAOYSA-N 0.000 description 9
- OZAIFHULBGXAKX-VAWYXSNFSA-N AIBN Substances N#CC(C)(C)\N=N\C(C)(C)C#N OZAIFHULBGXAKX-VAWYXSNFSA-N 0.000 description 9
- 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
- 230000015572 biosynthetic process Effects 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 9
- 229910001873 dinitrogen Inorganic materials 0.000 description 9
- WNAHIZMDSQCWRP-UHFFFAOYSA-N dodecane-1-thiol Chemical compound CCCCCCCCCCCCS WNAHIZMDSQCWRP-UHFFFAOYSA-N 0.000 description 9
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 9
- PHTQWCKDNZKARW-UHFFFAOYSA-N isoamylol Chemical compound CC(C)CCO PHTQWCKDNZKARW-UHFFFAOYSA-N 0.000 description 9
- 239000003505 polymerization initiator Substances 0.000 description 9
- 238000003786 synthesis reaction Methods 0.000 description 9
- FRDAATYAJDYRNW-UHFFFAOYSA-N 3-methyl-3-pentanol Chemical compound CCC(C)(O)CC FRDAATYAJDYRNW-UHFFFAOYSA-N 0.000 description 8
- AMQJEAYHLZJPGS-UHFFFAOYSA-N N-Pentanol Chemical compound CCCCCO AMQJEAYHLZJPGS-UHFFFAOYSA-N 0.000 description 8
- 239000003054 catalyst Substances 0.000 description 8
- 229910052739 hydrogen Inorganic materials 0.000 description 8
- 238000002156 mixing Methods 0.000 description 8
- WGTYBPLFGIVFAS-UHFFFAOYSA-M tetramethylammonium hydroxide Chemical compound [OH-].C[N+](C)(C)C WGTYBPLFGIVFAS-UHFFFAOYSA-M 0.000 description 8
- MSXVEPNJUHWQHW-UHFFFAOYSA-N 2-methylbutan-2-ol Chemical compound CCC(C)(C)O MSXVEPNJUHWQHW-UHFFFAOYSA-N 0.000 description 7
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 7
- 239000005456 alcohol based solvent Substances 0.000 description 7
- 150000001336 alkenes Chemical class 0.000 description 7
- 229940116333 ethyl lactate Drugs 0.000 description 7
- 125000000623 heterocyclic group Chemical group 0.000 description 7
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 7
- LLHKCFNBLRBOGN-UHFFFAOYSA-N propylene glycol methyl ether acetate Chemical compound COCC(C)OC(C)=O LLHKCFNBLRBOGN-UHFFFAOYSA-N 0.000 description 7
- 230000005855 radiation Effects 0.000 description 7
- 239000004094 surface-active agent Substances 0.000 description 7
- BBMCTIGTTCKYKF-UHFFFAOYSA-N 1-heptanol Chemical compound CCCCCCCO BBMCTIGTTCKYKF-UHFFFAOYSA-N 0.000 description 6
- CETWDUZRCINIHU-UHFFFAOYSA-N 2-heptanol Chemical compound CCCCCC(C)O CETWDUZRCINIHU-UHFFFAOYSA-N 0.000 description 6
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 6
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 6
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 6
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 6
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 description 6
- MWKFXSUHUHTGQN-UHFFFAOYSA-N decan-1-ol Chemical compound CCCCCCCCCCO MWKFXSUHUHTGQN-UHFFFAOYSA-N 0.000 description 6
- 238000011161 development Methods 0.000 description 6
- 230000018109 developmental process Effects 0.000 description 6
- 238000007654 immersion Methods 0.000 description 6
- 229910052717 sulfur Inorganic materials 0.000 description 6
- 229910052723 transition metal Inorganic materials 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- QYKIQEUNHZKYBP-UHFFFAOYSA-N Vinyl ether Chemical class C=COC=C QYKIQEUNHZKYBP-UHFFFAOYSA-N 0.000 description 5
- 125000003545 alkoxy group Chemical group 0.000 description 5
- 125000005234 alkyl aluminium group Chemical group 0.000 description 5
- 150000001768 cations Chemical class 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
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 5
- 150000002576 ketones Chemical group 0.000 description 5
- 150000002596 lactones Chemical class 0.000 description 5
- MUJIDPITZJWBSW-UHFFFAOYSA-N palladium(2+) Chemical compound [Pd+2] MUJIDPITZJWBSW-UHFFFAOYSA-N 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 150000003624 transition metals Chemical class 0.000 description 5
- 229910052720 vanadium Inorganic materials 0.000 description 5
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 5
- ATVJXMYDOSMEPO-UHFFFAOYSA-N 3-prop-2-enoxyprop-1-ene Chemical compound C=CCOCC=C ATVJXMYDOSMEPO-UHFFFAOYSA-N 0.000 description 4
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 4
- CERQOIWHTDAKMF-UHFFFAOYSA-M Methacrylate Chemical compound CC(=C)C([O-])=O CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 description 4
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 description 4
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 4
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 4
- 239000003513 alkali Substances 0.000 description 4
- XXROGKLTLUQVRX-UHFFFAOYSA-N allyl alcohol Chemical compound OCC=C XXROGKLTLUQVRX-UHFFFAOYSA-N 0.000 description 4
- DKPFZGUDAPQIHT-UHFFFAOYSA-N butyl acetate Chemical compound CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 4
- MVPPADPHJFYWMZ-UHFFFAOYSA-N chlorobenzene Chemical compound ClC1=CC=CC=C1 MVPPADPHJFYWMZ-UHFFFAOYSA-N 0.000 description 4
- MGNZXYYWBUKAII-UHFFFAOYSA-N cyclohexa-1,3-diene Chemical compound C1CC=CC=C1 MGNZXYYWBUKAII-UHFFFAOYSA-N 0.000 description 4
- ZSWFCLXCOIISFI-UHFFFAOYSA-N cyclopentadiene Chemical compound C1C=CC=C1 ZSWFCLXCOIISFI-UHFFFAOYSA-N 0.000 description 4
- BGTOWKSIORTVQH-UHFFFAOYSA-N cyclopentanone Chemical compound O=C1CCCC1 BGTOWKSIORTVQH-UHFFFAOYSA-N 0.000 description 4
- 230000007547 defect Effects 0.000 description 4
- 125000005678 ethenylene group Chemical group [H]C([*:1])=C([H])[*:2] 0.000 description 4
- 150000004820 halides Chemical class 0.000 description 4
- ZSIAUFGUXNUGDI-UHFFFAOYSA-N hexan-1-ol Chemical compound CCCCCCO ZSIAUFGUXNUGDI-UHFFFAOYSA-N 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 4
- ZXEKIIBDNHEJCQ-UHFFFAOYSA-N isobutanol Chemical compound CC(C)CO ZXEKIIBDNHEJCQ-UHFFFAOYSA-N 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 125000005397 methacrylic acid ester group Chemical group 0.000 description 4
- 150000002848 norbornenes Chemical class 0.000 description 4
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 4
- 125000000843 phenylene group Chemical group C1(=C(C=CC=C1)*)* 0.000 description 4
- 239000002685 polymerization catalyst Substances 0.000 description 4
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 4
- 239000007870 radical polymerization initiator Substances 0.000 description 4
- 239000011342 resin composition Substances 0.000 description 4
- 230000035945 sensitivity Effects 0.000 description 4
- 150000003440 styrenes Chemical class 0.000 description 4
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 4
- 125000004434 sulfur atom Chemical group 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- VZGDMQKNWNREIO-UHFFFAOYSA-N tetrachloromethane Chemical compound ClC(Cl)(Cl)Cl VZGDMQKNWNREIO-UHFFFAOYSA-N 0.000 description 4
- ALSTYHKOOCGGFT-KTKRTIGZSA-N (9Z)-octadecen-1-ol Chemical compound CCCCCCCC\C=C/CCCCCCCCO ALSTYHKOOCGGFT-KTKRTIGZSA-N 0.000 description 3
- JOLQKTGDSGKSKJ-UHFFFAOYSA-N 1-ethoxypropan-2-ol Chemical compound CCOCC(C)O JOLQKTGDSGKSKJ-UHFFFAOYSA-N 0.000 description 3
- YRSIFCHKXFKNME-UHFFFAOYSA-N 2,3-dimethylpentan-2-ol Chemical compound CCC(C)C(C)(C)O YRSIFCHKXFKNME-UHFFFAOYSA-N 0.000 description 3
- TZYRSLHNPKPEFV-UHFFFAOYSA-N 2-ethyl-1-butanol Chemical compound CCC(CC)CO TZYRSLHNPKPEFV-UHFFFAOYSA-N 0.000 description 3
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 description 3
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 3
- 0 C*(C)C1(C(C)(C)C1)C(OC(CCO1)C1=O)=O Chemical compound C*(C)C1(C(C)(C)C1)C(OC(CCO1)C1=O)=O 0.000 description 3
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 3
- NTIZESTWPVYFNL-UHFFFAOYSA-N Methyl isobutyl ketone Chemical compound CC(C)CC(C)=O NTIZESTWPVYFNL-UHFFFAOYSA-N 0.000 description 3
- UIHCLUNTQKBZGK-UHFFFAOYSA-N Methyl isobutyl ketone Natural products CCC(C)C(C)=O UIHCLUNTQKBZGK-UHFFFAOYSA-N 0.000 description 3
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 3
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 3
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 3
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 3
- ORILYTVJVMAKLC-UHFFFAOYSA-N adamantane Chemical group C1C(C2)CC3CC1CC2C3 ORILYTVJVMAKLC-UHFFFAOYSA-N 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 3
- 150000001721 carbon Chemical group 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 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
- LQZZUXJYWNFBMV-UHFFFAOYSA-N dodecan-1-ol Chemical compound CCCCCCCCCCCCO LQZZUXJYWNFBMV-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- SFFVATKALSIZGN-UHFFFAOYSA-N hexadecan-7-ol Chemical compound CCCCCCCCCC(O)CCCCCC SFFVATKALSIZGN-UHFFFAOYSA-N 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- CPOFMOWDMVWCLF-UHFFFAOYSA-N methyl(oxo)alumane Chemical compound C[Al]=O CPOFMOWDMVWCLF-UHFFFAOYSA-N 0.000 description 3
- TVMXDCGIABBOFY-UHFFFAOYSA-N n-Octanol Natural products CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 description 3
- 125000004123 n-propyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])* 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 3
- 229940055577 oleyl alcohol Drugs 0.000 description 3
- XMLQWXUVTXCDDL-UHFFFAOYSA-N oleyl alcohol Natural products CCCCCCC=CCCCCCCCCCCO XMLQWXUVTXCDDL-UHFFFAOYSA-N 0.000 description 3
- 229910052763 palladium Inorganic materials 0.000 description 3
- RGSFGYAAUTVSQA-UHFFFAOYSA-N pentamethylene Natural products C1CCCC1 RGSFGYAAUTVSQA-UHFFFAOYSA-N 0.000 description 3
- 229910052698 phosphorus Inorganic materials 0.000 description 3
- 238000000206 photolithography Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000010526 radical polymerization reaction Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 238000004528 spin coating Methods 0.000 description 3
- UKRDPEFKFJNXQM-UHFFFAOYSA-N vinylsilane Chemical class [SiH3]C=C UKRDPEFKFJNXQM-UHFFFAOYSA-N 0.000 description 3
- 239000008096 xylene Substances 0.000 description 3
- VDDICZVAQMPRIB-UHFFFAOYSA-N (2-hydroxy-1-adamantyl) 2-methylprop-2-enoate Chemical compound C1C(C2)CC3CC2C(O)C1(OC(=O)C(=C)C)C3 VDDICZVAQMPRIB-UHFFFAOYSA-N 0.000 description 2
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- 125000003696 stearoyl group Chemical group O=C([*])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 125000002730 succinyl group Chemical group C(CCC(=O)*)(=O)* 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-O sulfonium Chemical compound [SH3+] RWSOTUBLDIXVET-UHFFFAOYSA-O 0.000 description 1
- 238000010557 suspension polymerization reaction Methods 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 150000003505 terpenes Chemical class 0.000 description 1
- 235000007586 terpenes Nutrition 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
- OPQYOFWUFGEMRZ-UHFFFAOYSA-N tert-butyl 2,2-dimethylpropaneperoxoate Chemical compound CC(C)(C)OOC(=O)C(C)(C)C OPQYOFWUFGEMRZ-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
- AFCAKJKUYFLYFK-UHFFFAOYSA-N tetrabutyltin Chemical compound CCCC[Sn](CCCC)(CCCC)CCCC AFCAKJKUYFLYFK-UHFFFAOYSA-N 0.000 description 1
- YOUIDGQAIILFBW-UHFFFAOYSA-J tetrachlorotungsten Chemical compound Cl[W](Cl)(Cl)Cl YOUIDGQAIILFBW-UHFFFAOYSA-J 0.000 description 1
- CRHIAMBJMSSNNM-UHFFFAOYSA-N tetraphenylstannane Chemical compound C1=CC=CC=C1[Sn](C=1C=CC=CC=1)(C=1C=CC=CC=1)C1=CC=CC=C1 CRHIAMBJMSSNNM-UHFFFAOYSA-N 0.000 description 1
- 125000001544 thienyl group Chemical group 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- XJDNKRIXUMDJCW-UHFFFAOYSA-J titanium tetrachloride Chemical compound Cl[Ti](Cl)(Cl)Cl XJDNKRIXUMDJCW-UHFFFAOYSA-J 0.000 description 1
- 125000005425 toluyl group Chemical group 0.000 description 1
- FEONEKOZSGPOFN-UHFFFAOYSA-K tribromoiron Chemical compound Br[Fe](Br)Br FEONEKOZSGPOFN-UHFFFAOYSA-K 0.000 description 1
- IMFACGCPASFAPR-UHFFFAOYSA-N tributylamine Chemical compound CCCCN(CCCC)CCCC IMFACGCPASFAPR-UHFFFAOYSA-N 0.000 description 1
- 125000003866 trichloromethyl group Chemical group ClC(Cl)(Cl)* 0.000 description 1
- SWZDQOUHBYYPJD-UHFFFAOYSA-N tridodecylamine Chemical compound CCCCCCCCCCCCN(CCCCCCCCCCCC)CCCCCCCCCCCC SWZDQOUHBYYPJD-UHFFFAOYSA-N 0.000 description 1
- 125000004205 trifluoroethyl group Chemical group [H]C([H])(*)C(F)(F)F 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
- 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 1
- YFTHZRPMJXBUME-UHFFFAOYSA-N tripropylamine Chemical compound CCCN(CCC)CCC YFTHZRPMJXBUME-UHFFFAOYSA-N 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 125000003774 valeryl group Chemical group O=C([*])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- JTJFQBNJBPPZRI-UHFFFAOYSA-J vanadium tetrachloride Chemical compound Cl[V](Cl)(Cl)Cl JTJFQBNJBPPZRI-UHFFFAOYSA-J 0.000 description 1
- 229920001567 vinyl ester resin Polymers 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- 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
- C08F220/26—Esters containing oxygen in addition to the carboxy oxygen
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- 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
- G03F7/0035—Multiple processes, e.g. applying a further resist layer on an already in a previously step, processed pattern or textured surface
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- 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
- G03F7/0042—Photosensitive materials with inorganic or organometallic light-sensitive compounds not otherwise provided for, e.g. inorganic resists
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- 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
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- 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
- G03F7/0046—Photosensitive materials with perfluoro compounds, e.g. for dry lithography
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- 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
- G03F7/027—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds
- G03F7/028—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds with photosensitivity-increasing substances, e.g. photoinitiators
- G03F7/031—Organic compounds not covered by group G03F7/029
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- 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
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- 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
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- 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
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- 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
- G03F7/2041—Exposure; Apparatus therefor in the presence of a fluid, e.g. immersion; using fluid cooling means
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Materials For Photolithography (AREA)
- Exposure And Positioning Against Photoresist Photosensitive Materials (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Description
で表される基を含有する高分子化合物、有機溶剤および酸発生剤を含有する化学増幅ポジ型レジスト材料が開示され、当該レジスト材料は、高エネルギー線に感応し、特に170nm以下の波長における感度が優れている上、レジストの透明性が向上し、優れたプラズマエッチング耐性を有するとされる。
ナフタレン環を有する単量体、およびその単量体に由来する繰り返し単位を含有する高分子化合物が開示され、当該高分子化合物を用いたパターン硬化可能なレジスト材料、レジスト膜を硬化させる工程を含むパターン形成方法により、ダブルパターニングプロセス等により高度な微細加工を可能にしたとされる。
(R1はメチル基、トリフルオロメチル基、または水素原子を表し、R2およびR3は相互に独立に水素原子、置換もしくは非置換の炭素数1〜10の直鎖状もしくは分岐状のアルキル基を表し、Mm+はオニウム陽イオンを表し、mは1〜3の自然数を、nは0〜3の自然数をそれぞれ示す。)
で表される感放射線性樹脂組成物用化合物を用いた感放射線性樹脂組成物は、活性光線、例えばKrFエキシマレーザ(波長248nm)あるいはArFエキシマレーザに代表される遠紫外線に感応する化学増幅型レジストとして有用であり、今後ますます微細化が進行すると予想される集積回路素子の製造に極めて好適に使用することができるとされる。
1,1,1,3,3,3−ヘキサフルオロ−2−ヒドロキシイソプロピル[−C(CF3)2OH]基(以下、HFIP基と呼ぶことがある)を有する繰り返し単位または密着性基を有する繰り返し単位をさらに含有することを特徴とする発明1または発明2の重合体。
で表される塩を有する繰り返し単位をさらに含有することを特徴とする発明1または発明2の重合体。
発明1乃至発明3のいずれかの重合体を含有することを特徴とするレジスト材料。
さらに、酸発生剤、塩基性化合物および有機溶剤のうち少なくとも一種を含むことを特徴とする発明4のレジスト材料。
有機溶剤に炭素数5〜20のアルコール系溶剤を用いたことを特徴とする発明5のレジスト材料。
発明4乃至発明6のいずれかのレジスト材料を基板上に塗布する第1の工程と、当該基板を加熱処理してレジスト膜を形成し、露光機を用いて波長300nm以下の紫外光および極紫外光でフォトマスクを介しレジスト膜を露光する第2の工程と、レジスト膜の露光部位を現像液に溶解させて現像し、基板上にパターン形成する第3の工程からなることを特徴とするパターン形成方法。
ウェハーと投影レンズの間に水を挿入し、露光機を用いて、波長193nmのArFエキシマレーザを用いて紫外光を照射する液浸リソグラフィ法を採用したこと特徴とする発明7のパターン形成方法。
基板上に形成された第1のレジストパターン上に第2のレジストパターンを形成するダブルパターニングによるパターン形成方法であって、発明4乃至発明6のいずれかのレジスト材料を用いることを特徴とするパターン形成方法。
波長13.5nmの紫外光を用いるEUVリソグラフィ法であって、発明4乃至発明6のいずれかのレジスト材料を用いることを特徴とするパターン形成方法。
で表される繰り返し単位と、酸分解性基を有する繰り返し単位とを含有することを特徴とする重合体である。
2. 酸分解性基を有する繰り返し単位
化学増幅ポジ型レジストを調製する場合、レジストに用いる重合体としては、現像液(通常、アルカリ現像液)に不溶または難溶であって、酸によって現像液に可溶となるものが使用される。このため、本発明のレジスト材料において、本発明の重合体中には酸によって開裂し得る、酸分解性基を有する繰り返し単位の含有が必須である。
本発明の重合体にアルカリ現像性および親水性の特徴を付属させたい場合、発明2の重合体のように、HFIP基を含む繰り返し単位を導入させてもよい。繰り返し単位を形成できる重合性単量体を具体的に示すと、下記に示す化合物群を挙げることができる。
発明1の重合体において、基板との密着性が不足する場合、発明2の重合体のように、密着性基を有する繰り返し単位として、ラクトン構造を含む繰り返し単位を導入してもよい。繰り返し単位を形成できる重合性単量体を具体的に示すと、メタクリロイルオキシブチロラクトン、メタクリロイルオキシバレロラクトン、5−メタクリロイルオキシ−2、6−ノルボルナンカルボラクトン等を例示することができる。
また、本発明の重合体には、発明3の重合体のように、さらに塩を有する繰り返し単位として、一般式(2)および(3)で表されるオニウム塩を有する繰り返し構造単位を有する繰り返し単位を加えてもよい。オニウム塩の部位は酸発生剤として機能し、露光ないしは加熱によりスルホン酸を発生する作用を有し、特に、後述する感放射線性樹脂組成物における感放射線性酸発生剤として使用することができる。
上記一般式(2)および一般式(3)におけるアニオンは、具体的には下記のものを例示することができる。
次いで、本発明の重合体に他の繰り返し単位を与える単量体について説明する。
次いで、本発明の重合体およびその合成方法について説明する。
次いで、本発明のレジスト材料について説明する。
光酸発生剤は紫外光または極紫外光を照射することで、酸を発生する機能を有する感光剤であり、本発明のレジスト材料に用いる光酸発生剤には、特に制限はなく、化学増幅型レジストの酸発生剤として用いられるものの中から、溶剤に可溶化するものであれば、任意のものを選択して使用することができる。このような酸発生剤の例としては、ヨードニウムスルホネート、スルホニウムスルホネート等のオニウムスルホネート、スルホン酸エステル、N−イミドスルホネート、N−オキシムスルホネート、o−ニトロベンジルスルホネート、またはピロガロール等のトリスメタンスルホネートを挙げることができる。
本発明のレジスト材料には、塩基性化合物を配合することができる。当該塩基性化合物は、酸発生剤より発生する酸がレジスト膜中に拡散する際の拡散速度を抑制する働きがあり、これにより、酸拡散距離を調整してレジストパターン形状の改善ができる。
本発明のレジスト材料に用いる溶剤としては、配合する各成分を溶解して均一な溶液にできればよく、従来のレジスト用溶剤の中から選択して用いることができる。また、2種類以上の溶剤を混合して用いることも可能である。
本発明のレジスト材料においては、必要により界面活性剤を添加してもよい。かかる界面活性剤としては、フッ素系界面活性剤もしくはシリコン系界面活性剤またはフッ素原子とケイ素原子の両方を有する界面活性剤のいずれか、あるいは2種以上を含有することができる。
次いで本発明のパターン形成方法について説明する。
本発明のレジストは、液浸リソグラフィのレジストとして使用できる。
ダブルパターニングとは、リソグラフィで目的とするパターンを得るために、マスクあるいはレチクル、2つの密集度の低いパターンに分割し露光し、重ねて露光現像し密集度の高いパターンを得る技術である。
本発明のレジストは、露光量が小さく、PEB温度が低くても、優れた感度を有することより、光源の出力が低いEUVリソグラフィのレジストとして好適に用いることができる。
されるものではない。
重合体1の合成
ガラス製フラスコ中に、2−ブタノンを93.2g、下記4oxo−CHMAを21.2g、下記ECOMAを25.4gおよびn−ドデシルメルカプタン(東京化成株式会社製、以下同じものを使用した)を0.3g溶解した。
[実施例2]
重合体2の合成
ガラス製フラスコ中に、2−ブタノンを303.4g、下記4oxo−CHMAを44.5g、下記MA−EADを51.5g、下記MA35を55.7gおよびn−ドデシルメルカプタンを0.3g溶解した。
[実施例3]
重合体3の合成
ガラス製フラスコ中に、2−ブタノンを254.2g、下記3oxo−CHMAを35.0g、下記MA−ECPを44.6g、下記MA3−4OHを47.5gおよびn−ドデシルメルカプタンを0.15g溶解した。
[実施例4]
重合体4の合成
ガラス製フラスコ中に、2−ブタノンを225.2g、下記4oxo−CHMAを31.8g、下記MA−ECPを48.8g、下記MA−ADOHを32.0gおよびn−ドデシルメルカプタンを0.35g溶解した。
[実施例5]
重合体5の合成
ガラス製フラスコ中に、2−ブタノンを239.2g、下記3oxo−CHMAを34.0g、下記MA−ECPを44.6g、下記MA−ADOHを27.9g、下記TPS−IMAを13.1gおよびn−ドデシルメルカプタンを0.24g溶解した。
[実施例6]
重合体6の合成
ガラス製フラスコ中に、2−ブタノンを318g、下記4oxo−CHMAを37.2g、下記MA−EADを55.7g、下記MA35を53.0g、上記TPS−IMAを13.1g、およびn−ドデシルメルカプタンを0.5g溶解した。
[比較例1]
重合体7の合成
実施例3における3oxo−CHMAの替わりに、MA−GBLを用い、本発明の範疇に属さない重合体7を合成した。
[比較例2]
重合体8の合成
実施例4における4oxo−CHMAの変わりに、MA−NLを用いて本発明の範疇に属さない重合体8を合成した。
[比較例3]
重合体9の合成
実施例5における3oxo−CHMAの替わりに、MA−GBLを用い、本発明の範疇に属さない重合体9を合成した。
[重合結果]
実施例1〜6および比較例1〜3で得られた重合体について、分子量と組成を測定した。重合体の分子量(数平均分子量Mn)と分子量分散(Mnと重量平均分子量Mwの比、Mw/Mn)は、東ソー株式会社製、高速GPC装置、品番、HLC−8320GPCにおいて、東ソー株式会社製ALPHA−MカラムとALPHA−2500カラムを1本ずつ直列に繋ぎ、展開溶媒としてテトラヒドロフランを用いて測定した。検出器は屈折率差検出器を用いた。また、重合体の組成は1H−NMRおよび19F−NMRによって確認した。
実施例1〜6および比較例1〜3で合成した重合体1〜9を用い、それぞれ光酸発生剤(PAG)、塩基性化合物、溶剤を配合してレジスト溶液を調製した(各々、レジスト1〜9とする)。配合比を表2に示した。
得られたシリコンウェハー上の樹脂膜は、接触角計(協和界面科学株式会社製)を用いて水滴の接触角を測定した。結果を表2に示した。
前述と同様に、レジストを塗布して樹脂膜を形成したシリコンウェハーを、アルカリ現像液であるテトラメチルアンモニウムハイドロオキサイドの濃度2.38質量%水溶液に浸漬し溶解性を試験した。樹脂の溶解は、浸漬後の膜の残存を光干渉型の膜厚計で測定することによって調べた。測定結果を表3に示した。
前述と同様に、レジストを塗布して樹脂膜を形成したシリコンウェハーを、100℃で60秒間プリベークを行った後、フォトマスクを介して、ArFレーザによる波長193nmの紫外光で露光した。露光後のウェハーを回転させながら純水を2分間滴下した。その後、120℃で60秒間PEBを行い、アルカリ現像液で現像した。
前述と同様のレジスト配合で、レジスト材料を塗布して樹脂膜を形成したシリコンウェハーを、MIBCに浸漬し、溶解性を試験した。溶解性試験の結果を表3に示した。
Claims (10)
- 下記一般式(1):
で表される繰り返し単位(A)と、
アクリル酸、メタクリル酸またはトリフルオロメタクリル酸のカルボキシキル基の水素原子が酸分解性基で置換されてなり、酸分解性基が3級アルキル基、またはtert−ブトキシカルボニル基、tert−アミロキシカルボニル基、1,1−ジエチルプロピルオキシカルボニル基、1−エチルシクロペンチルオキシカルボニル基、1−エチル−2−シクロペンテニルオキシカルボニル基、1−エトキシエトキシカルボニルメチル基、メトキシメチル基、tert−ブチルチオメチル基、フェニルジメチルメトキシメチル基、ベンジルオキシメチル基、p−メトキシベンジルオキシメチル基、4−メトキシフェノキシメチル基、グアイアコメチル基、tert−ブチルオキシ基、シリルオキシメチル基、2−メトキシエトキシメチル基、2−(トリメチルシリル)エトキシメチル基、テトラヒドロピラニル基、テトラヒドロチオピラニル基、1−メトキシシクロヘキシル基、4−メトキシテトラヒドロピラニル基、4−メトキシテトラヒドロチオピラニル基、1,4−ジオキサン−2−イル基、テトラヒドロフラニル基、テトラヒドロチオフラニル基、1−エトキシエチル基、1−メチル−1−メトキシエチル基および1−メチル−1−ベンジルオキシエチル基からなる群から選ばれる酸分解性基であり、さらに当該酸分解性基の水素原子の一部または全部がフッ素原子で置換されていてもよい単量体が重合してなる繰り返し単位(B)と、
1,1,1,3,3,3−ヘキサフルオロ−2−ヒドロキシイソプロピル基を有する繰り返し単位(C)と、
以下の式:
含有することを特徴とする重合体。 - 三級アルキル基が、tert−ブチル基、tert−アミル基、1,1−ジエチルプロピル基、1−メチルシクロペンチル基、1−エチルシクロペンチル基、1−イソプロピルシクロペンチル基、1−プロピルシクロペンチル基、1−ブチルシクロペンチル基、1−メチルシクロヘキシル基、1−エチルシクロヘキシル基、1−イソプロピルシクロヘキシル基、1−プロピルシクロヘキシル基、1−ブチルシクロヘキシル基、1−エチルシクロオクチル基、メチルアダマンチル基、エチルアダマンチル基、イソプロピルアダマンチル基およびプロピルアダマンチル基からなる群、またはこれらの三級アルキル基に含まれる水素原子の一部もしくは全部がフッ素原子で置換された三級アルキル基から選ばれた三級アルキル基である請求項1に記載の重合体。
- 請求項1乃至請求項3のいずれか1項に記載の重合体を含有することを特徴とするレジスト材料。
- さらに酸発生剤、塩基性化合物および有機溶剤のうち少なくとも一種を含むことを特徴とする請求項4に記載のレジスト材料。
- 有機溶剤に炭素数5〜20のアルコール系溶剤を用いたことを特徴とする請求項5に記載のレジスト材料。
- 請求項4乃至請求項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第1の工程と、当該基板を加熱処理してレジスト膜を形成し、露光機を用いて波長300nm以下の紫外光および極紫外光でフォトマスクを介しレジスト膜を露光する第2の工程と、レジスト膜の露光部位を現像液に溶解させて現像し、基板上にパターン形成する第3の工程からなることを特徴とするパターン形成方法。
- ウェハーと投影レンズの間に水を挿入し、露光機を用いて、波長193nmのArFエキシマレーザを用いて紫外光を照射する液浸リソグラフィ法を採用したこと特徴とする請求項7に記載のパターン形成方法。
- 基板上に形成された第1のレジストパターン上に第2のレジストパターンを形成するダブルパターニングによるパターン形成方法であって、請求項4乃至請求項6のいずれか1項に記載のレジスト材料を用いることを特徴とするパターン形成方法。
- 波長13.5nmの紫外光を用いるEUVリソグラフィ法であって、請求項4乃至請求項6のいずれか1項に記載のレジスト材料を用いることを特徴とするパターン形成方法。
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