US20180356732A1 - Resist underlayer film-forming composition containing indolocarbazole novolak resin - Google Patents
Resist underlayer film-forming composition containing indolocarbazole novolak resin Download PDFInfo
- Publication number
- US20180356732A1 US20180356732A1 US15/780,657 US201615780657A US2018356732A1 US 20180356732 A1 US20180356732 A1 US 20180356732A1 US 201615780657 A US201615780657 A US 201615780657A US 2018356732 A1 US2018356732 A1 US 2018356732A1
- Authority
- US
- United States
- Prior art keywords
- underlayer film
- resist underlayer
- group
- resist
- film
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 239000000203 mixture Substances 0.000 title claims description 96
- VVVPGLRKXQSQSZ-UHFFFAOYSA-N indolo[3,2-c]carbazole Chemical compound C1=CC=CC2=NC3=C4C5=CC=CC=C5N=C4C=CC3=C21 VVVPGLRKXQSQSZ-UHFFFAOYSA-N 0.000 title claims description 11
- 229920005989 resin Polymers 0.000 title description 16
- 239000011347 resin Substances 0.000 title description 16
- 229920003986 novolac Polymers 0.000 title description 7
- 229960005544 indolocarbazole Drugs 0.000 title description 5
- 150000001875 compounds Chemical class 0.000 claims abstract description 44
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims abstract description 31
- 125000003118 aryl group Chemical group 0.000 claims abstract description 20
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims abstract description 18
- 125000000217 alkyl group Chemical group 0.000 claims abstract description 14
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 8
- 125000004432 carbon atom Chemical group C* 0.000 claims abstract description 8
- 125000003277 amino group Chemical group 0.000 claims abstract description 4
- 239000000758 substrate Substances 0.000 claims description 50
- 229920000642 polymer Polymers 0.000 claims description 43
- 239000004065 semiconductor Substances 0.000 claims description 32
- 239000002253 acid Substances 0.000 claims description 23
- 238000005530 etching Methods 0.000 claims description 19
- 238000010894 electron beam technology Methods 0.000 claims description 17
- 239000004971 Cross linker Substances 0.000 claims description 16
- 238000006243 chemical reaction Methods 0.000 claims description 16
- 238000011161 development Methods 0.000 claims description 15
- 238000012545 processing Methods 0.000 claims description 15
- 238000004519 manufacturing process Methods 0.000 claims description 13
- 125000000008 (C1-C10) alkyl group Chemical group 0.000 claims description 10
- SIKJAQJRHWYJAI-UHFFFAOYSA-N Indole Chemical compound C1=CC=C2NC=CC2=C1 SIKJAQJRHWYJAI-UHFFFAOYSA-N 0.000 claims description 10
- 230000001678 irradiating effect Effects 0.000 claims description 6
- PZOUSPYUWWUPPK-UHFFFAOYSA-N indole Natural products CC1=CC=CC2=C1C=CN2 PZOUSPYUWWUPPK-UHFFFAOYSA-N 0.000 claims description 5
- RKJUIXBNRJVNHR-UHFFFAOYSA-N indolenine Natural products C1=CC=C2CC=NC2=C1 RKJUIXBNRJVNHR-UHFFFAOYSA-N 0.000 claims description 5
- WURBFLDFSFBTLW-UHFFFAOYSA-N benzil Chemical compound C=1C=CC=CC=1C(=O)C(=O)C1=CC=CC=C1 WURBFLDFSFBTLW-UHFFFAOYSA-N 0.000 claims description 4
- 239000010408 film Substances 0.000 description 152
- -1 2-methyl-cyclopropyl group Chemical group 0.000 description 80
- 238000001459 lithography Methods 0.000 description 31
- 238000000034 method Methods 0.000 description 25
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- 239000000126 substance Substances 0.000 description 25
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- 230000000052 comparative effect Effects 0.000 description 20
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- 230000015572 biosynthetic process Effects 0.000 description 14
- 238000005259 measurement Methods 0.000 description 14
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- 238000000576 coating method Methods 0.000 description 13
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- AFVFQIVMOAPDHO-UHFFFAOYSA-N Methanesulfonic acid Chemical compound CS(O)(=O)=O AFVFQIVMOAPDHO-UHFFFAOYSA-N 0.000 description 12
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- LZCLXQDLBQLTDK-UHFFFAOYSA-N ethyl 2-hydroxypropanoate Chemical compound CCOC(=O)C(C)O LZCLXQDLBQLTDK-UHFFFAOYSA-N 0.000 description 12
- 238000003786 synthesis reaction Methods 0.000 description 12
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 11
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- 229910052710 silicon Inorganic materials 0.000 description 11
- 239000010703 silicon Substances 0.000 description 11
- UJOBWOGCFQCDNV-UHFFFAOYSA-N 9H-carbazole Chemical compound C1=CC=C2C3=CC=CC=C3NC2=C1 UJOBWOGCFQCDNV-UHFFFAOYSA-N 0.000 description 10
- 0 C*C(C)(C)C Chemical compound C*C(C)(C)C 0.000 description 10
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- 238000010992 reflux Methods 0.000 description 10
- 239000007787 solid Substances 0.000 description 10
- 239000000463 material Substances 0.000 description 8
- KJIFKLIQANRMOU-UHFFFAOYSA-N oxidanium;4-methylbenzenesulfonate Chemical compound O.CC1=CC=C(S(O)(=O)=O)C=C1 KJIFKLIQANRMOU-UHFFFAOYSA-N 0.000 description 8
- 239000000047 product Substances 0.000 description 8
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- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 6
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 6
- 239000004793 Polystyrene Substances 0.000 description 6
- 150000001299 aldehydes Chemical class 0.000 description 6
- 239000006117 anti-reflective coating Substances 0.000 description 6
- 229940098779 methanesulfonic acid Drugs 0.000 description 6
- 229920002223 polystyrene Polymers 0.000 description 6
- 238000002203 pretreatment Methods 0.000 description 6
- JOXIMZWYDAKGHI-UHFFFAOYSA-N toluene-4-sulfonic acid Chemical compound CC1=CC=C(S(O)(=O)=O)C=C1 JOXIMZWYDAKGHI-UHFFFAOYSA-N 0.000 description 6
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- 238000001226 reprecipitation Methods 0.000 description 5
- 125000001424 substituent group Chemical group 0.000 description 5
- ARXJGSRGQADJSQ-UHFFFAOYSA-N 1-methoxypropan-2-ol Chemical compound COCC(C)O ARXJGSRGQADJSQ-UHFFFAOYSA-N 0.000 description 4
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 4
- 229910052581 Si3N4 Inorganic materials 0.000 description 4
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Natural products NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 4
- 239000006096 absorbing agent Substances 0.000 description 4
- HUMNYLRZRPPJDN-UHFFFAOYSA-N benzaldehyde Chemical compound O=CC1=CC=CC=C1 HUMNYLRZRPPJDN-UHFFFAOYSA-N 0.000 description 4
- 238000004132 cross linking Methods 0.000 description 4
- 238000000354 decomposition reaction Methods 0.000 description 4
- 238000004090 dissolution Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 229940116333 ethyl lactate Drugs 0.000 description 4
- NIHNNTQXNPWCJQ-UHFFFAOYSA-N fluorene Chemical compound C1=CC=C2CC3=CC=CC=C3C2=C1 NIHNNTQXNPWCJQ-UHFFFAOYSA-N 0.000 description 4
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 4
- 239000000178 monomer Substances 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 4
- WGTYBPLFGIVFAS-UHFFFAOYSA-M tetramethylammonium hydroxide Chemical compound [OH-].C[N+](C)(C)C WGTYBPLFGIVFAS-UHFFFAOYSA-M 0.000 description 4
- 238000007740 vapor deposition Methods 0.000 description 4
- 239000013585 weight reducing agent Substances 0.000 description 4
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 description 3
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- MRABAEUHTLLEML-UHFFFAOYSA-N Butyl lactate Chemical compound CCCCOC(=O)C(C)O MRABAEUHTLLEML-UHFFFAOYSA-N 0.000 description 3
- TWKXYFHGKQAQSB-UHFFFAOYSA-N C1(=CC=CC=C1)C=1C(=C2C(=CC1)N=C1C=CC3=C4C=CC=CC4=NC3=C12)C1=CC=CC=C1 Chemical compound C1(=CC=CC=C1)C=1C(=C2C(=CC1)N=C1C=CC3=C4C=CC=CC4=NC3=C12)C1=CC=CC=C1 TWKXYFHGKQAQSB-UHFFFAOYSA-N 0.000 description 3
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 3
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 239000002671 adjuvant Substances 0.000 description 3
- 230000003667 anti-reflective effect Effects 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 3
- 239000001191 butyl (2R)-2-hydroxypropanoate Substances 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 3
- 238000011109 contamination Methods 0.000 description 3
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N diphenyl Chemical group C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 229910052736 halogen Inorganic materials 0.000 description 3
- 150000002367 halogens Chemical class 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- RAXXELZNTBOGNW-UHFFFAOYSA-N imidazole Natural products C1=CNC=N1 RAXXELZNTBOGNW-UHFFFAOYSA-N 0.000 description 3
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 3
- 125000005581 pyrene group Chemical group 0.000 description 3
- 239000006254 rheological additive Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 150000003672 ureas Chemical class 0.000 description 3
- DLDWUFCUUXXYTB-UHFFFAOYSA-N (2-oxo-1,2-diphenylethyl) 4-methylbenzenesulfonate Chemical compound C1=CC(C)=CC=C1S(=O)(=O)OC(C=1C=CC=CC=1)C(=O)C1=CC=CC=C1 DLDWUFCUUXXYTB-UHFFFAOYSA-N 0.000 description 2
- BJFHJALOWQJJSQ-UHFFFAOYSA-N (3-methoxy-3-methylpentyl) acetate Chemical compound CCC(C)(OC)CCOC(C)=O BJFHJALOWQJJSQ-UHFFFAOYSA-N 0.000 description 2
- YXIWHUQXZSMYRE-UHFFFAOYSA-N 1,3-benzothiazole-2-thiol Chemical compound C1=CC=C2SC(S)=NC2=C1 YXIWHUQXZSMYRE-UHFFFAOYSA-N 0.000 description 2
- LIPRQQHINVWJCH-UHFFFAOYSA-N 1-ethoxypropan-2-yl acetate Chemical compound CCOCC(C)OC(C)=O LIPRQQHINVWJCH-UHFFFAOYSA-N 0.000 description 2
- DMFAHCVITRDZQB-UHFFFAOYSA-N 1-propoxypropan-2-yl acetate Chemical compound CCCOCC(C)OC(C)=O DMFAHCVITRDZQB-UHFFFAOYSA-N 0.000 description 2
- SVONRAPFKPVNKG-UHFFFAOYSA-N 2-ethoxyethyl acetate Chemical compound CCOCCOC(C)=O SVONRAPFKPVNKG-UHFFFAOYSA-N 0.000 description 2
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- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 2
- GZVHEAJQGPRDLQ-UHFFFAOYSA-N 6-phenyl-1,3,5-triazine-2,4-diamine Chemical class NC1=NC(N)=NC(C=2C=CC=CC=2)=N1 GZVHEAJQGPRDLQ-UHFFFAOYSA-N 0.000 description 2
- IKHGUXGNUITLKF-UHFFFAOYSA-N Acetaldehyde Chemical compound CC=O IKHGUXGNUITLKF-UHFFFAOYSA-N 0.000 description 2
- KWOLFJPFCHCOCG-UHFFFAOYSA-N Acetophenone Chemical compound CC(=O)C1=CC=CC=C1 KWOLFJPFCHCOCG-UHFFFAOYSA-N 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 2
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- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- NIQCNGHVCWTJSM-UHFFFAOYSA-N Dimethyl phthalate Chemical compound COC(=O)C1=CC=CC=C1C(=O)OC NIQCNGHVCWTJSM-UHFFFAOYSA-N 0.000 description 2
- XXRCUYVCPSWGCC-UHFFFAOYSA-N Ethyl pyruvate Chemical compound CCOC(=O)C(C)=O XXRCUYVCPSWGCC-UHFFFAOYSA-N 0.000 description 2
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- 239000004115 Sodium Silicate Substances 0.000 description 2
- 239000004147 Sorbitan trioleate Substances 0.000 description 2
- PRXRUNOAOLTIEF-ADSICKODSA-N Sorbitan trioleate Chemical compound CCCCCCCC\C=C/CCCCCCCC(=O)OC[C@@H](OC(=O)CCCCCCC\C=C/CCCCCCCC)[C@H]1OC[C@H](O)[C@H]1OC(=O)CCCCCCC\C=C/CCCCCCCC PRXRUNOAOLTIEF-ADSICKODSA-N 0.000 description 2
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- 125000005428 anthryl group Chemical group [H]C1=C([H])C([H])=C2C([H])=C3C(*)=C([H])C([H])=C([H])C3=C([H])C2=C1[H] 0.000 description 2
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- 239000012299 nitrogen atmosphere Substances 0.000 description 2
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- DTUQWGWMVIHBKE-UHFFFAOYSA-N phenylacetaldehyde Chemical compound O=CCC1=CC=CC=C1 DTUQWGWMVIHBKE-UHFFFAOYSA-N 0.000 description 2
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- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- WIBFFTLQMKKBLZ-SEYXRHQNSA-N n-butyl oleate Chemical compound CCCCCCCC\C=C/CCCCCCCC(=O)OCCCC WIBFFTLQMKKBLZ-SEYXRHQNSA-N 0.000 description 1
- GNVRJGIVDSQCOP-UHFFFAOYSA-N n-ethyl-n-methylethanamine Chemical compound CCN(C)CC GNVRJGIVDSQCOP-UHFFFAOYSA-N 0.000 description 1
- 125000001280 n-hexyl group Chemical group C(CCCCC)* 0.000 description 1
- KAHVZNKZQFSBFW-UHFFFAOYSA-N n-methyl-n-trimethylsilylmethanamine Chemical compound CN(C)[Si](C)(C)C KAHVZNKZQFSBFW-UHFFFAOYSA-N 0.000 description 1
- 125000000740 n-pentyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000004123 n-propyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- CXAYOCVHDCXPAI-UHFFFAOYSA-N naphthalen-1-yl(phenyl)methanone Chemical compound C=1C=CC2=CC=CC=C2C=1C(=O)C1=CC=CC=C1 CXAYOCVHDCXPAI-UHFFFAOYSA-N 0.000 description 1
- DCUJJWWUNKIJPH-UHFFFAOYSA-N nitrapyrin Chemical compound ClC1=CC=CC(C(Cl)(Cl)Cl)=N1 DCUJJWWUNKIJPH-UHFFFAOYSA-N 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 125000004433 nitrogen atom Chemical group N* 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical class CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- 150000002888 oleic acid derivatives Chemical class 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 125000000962 organic group Chemical group 0.000 description 1
- 150000002896 organic halogen compounds Chemical class 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 125000005375 organosiloxane group Chemical group 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- GIPDEPRRXIBGNF-KTKRTIGZSA-N oxolan-2-ylmethyl (z)-octadec-9-enoate Chemical compound CCCCCCCC\C=C/CCCCCCCC(=O)OCC1CCCO1 GIPDEPRRXIBGNF-KTKRTIGZSA-N 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 125000003854 p-chlorophenyl group Chemical group [H]C1=C([H])C(*)=C([H])C([H])=C1Cl 0.000 description 1
- 125000000636 p-nitrophenyl group Chemical group [H]C1=C([H])C(=C([H])C([H])=C1*)[N+]([O-])=O 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- FJKROLUGYXJWQN-UHFFFAOYSA-N papa-hydroxy-benzoic acid Natural products OC(=O)C1=CC=C(O)C=C1 FJKROLUGYXJWQN-UHFFFAOYSA-N 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 229940100595 phenylacetaldehyde Drugs 0.000 description 1
- 150000003021 phthalic acid derivatives Chemical class 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920002239 polyacrylonitrile Polymers 0.000 description 1
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 1
- 229920001444 polymaleic acid Polymers 0.000 description 1
- 239000002952 polymeric resin Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920000193 polymethacrylate Polymers 0.000 description 1
- 229920000259 polyoxyethylene lauryl ether Polymers 0.000 description 1
- 239000000256 polyoxyethylene sorbitan monolaurate Substances 0.000 description 1
- 235000010486 polyoxyethylene sorbitan monolaurate Nutrition 0.000 description 1
- 239000000249 polyoxyethylene sorbitan monopalmitate Substances 0.000 description 1
- 235000010483 polyoxyethylene sorbitan monopalmitate Nutrition 0.000 description 1
- 239000001818 polyoxyethylene sorbitan monostearate Substances 0.000 description 1
- 235000010989 polyoxyethylene sorbitan monostearate Nutrition 0.000 description 1
- 239000001816 polyoxyethylene sorbitan tristearate Substances 0.000 description 1
- 235000010988 polyoxyethylene sorbitan tristearate Nutrition 0.000 description 1
- 229920002503 polyoxyethylene-polyoxypropylene Polymers 0.000 description 1
- 229920005591 polysilicon Polymers 0.000 description 1
- 150000003141 primary amines Chemical class 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- ILVGAIQLOCKNQA-UHFFFAOYSA-N propyl 2-hydroxypropanoate Chemical compound CCCOC(=O)C(C)O ILVGAIQLOCKNQA-UHFFFAOYSA-N 0.000 description 1
- ILPVOWZUBFRIAX-UHFFFAOYSA-N propyl 2-oxopropanoate Chemical compound CCCOC(=O)C(C)=O ILPVOWZUBFRIAX-UHFFFAOYSA-N 0.000 description 1
- JCMFJIHDWDKYIL-UHFFFAOYSA-N propyl 3-methoxypropanoate Chemical compound CCCOC(=O)CCOC JCMFJIHDWDKYIL-UHFFFAOYSA-N 0.000 description 1
- FOWDZVNRQHPXDO-UHFFFAOYSA-N propyl hydrogen carbonate Chemical compound CCCOC(O)=O FOWDZVNRQHPXDO-UHFFFAOYSA-N 0.000 description 1
- 229940116423 propylene glycol diacetate Drugs 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- ZDYVRSLAEXCVBX-UHFFFAOYSA-N pyridinium p-toluenesulfonate Chemical compound C1=CC=[NH+]C=C1.CC1=CC=C(S([O-])(=O)=O)C=C1 ZDYVRSLAEXCVBX-UHFFFAOYSA-N 0.000 description 1
- HBCQSNAFLVXVAY-UHFFFAOYSA-N pyrimidine-2-thiol Chemical compound SC1=NC=CC=N1 HBCQSNAFLVXVAY-UHFFFAOYSA-N 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 229960004889 salicylic acid Drugs 0.000 description 1
- 125000002914 sec-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 150000003335 secondary amines Chemical class 0.000 description 1
- 125000000467 secondary amino group Chemical group [H]N([*:1])[*:2] 0.000 description 1
- 150000004756 silanes Chemical class 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 235000019795 sodium metasilicate Nutrition 0.000 description 1
- 229940035044 sorbitan monolaurate Drugs 0.000 description 1
- 239000001593 sorbitan monooleate Substances 0.000 description 1
- 235000011069 sorbitan monooleate Nutrition 0.000 description 1
- 229940035049 sorbitan monooleate Drugs 0.000 description 1
- 239000001570 sorbitan monopalmitate Substances 0.000 description 1
- 235000011071 sorbitan monopalmitate Nutrition 0.000 description 1
- 229940031953 sorbitan monopalmitate Drugs 0.000 description 1
- 239000001587 sorbitan monostearate Substances 0.000 description 1
- 235000011076 sorbitan monostearate Nutrition 0.000 description 1
- 229940035048 sorbitan monostearate Drugs 0.000 description 1
- 239000001589 sorbitan tristearate Substances 0.000 description 1
- 235000011078 sorbitan tristearate Nutrition 0.000 description 1
- 229960004129 sorbitan tristearate Drugs 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 150000003871 sulfonates Chemical class 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 150000003512 tertiary 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
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- 229940072958 tetrahydrofurfuryl oleate Drugs 0.000 description 1
- 238000002411 thermogravimetry Methods 0.000 description 1
- ZEMGGZBWXRYJHK-UHFFFAOYSA-N thiouracil Chemical compound O=C1C=CNC(=S)N1 ZEMGGZBWXRYJHK-UHFFFAOYSA-N 0.000 description 1
- 229950000329 thiouracil Drugs 0.000 description 1
- GQIUQDDJKHLHTB-UHFFFAOYSA-N trichloro(ethenyl)silane Chemical compound Cl[Si](Cl)(Cl)C=C GQIUQDDJKHLHTB-UHFFFAOYSA-N 0.000 description 1
- JCVQKRGIASEUKR-UHFFFAOYSA-N triethoxy(phenyl)silane Chemical compound CCO[Si](OCC)(OCC)C1=CC=CC=C1 JCVQKRGIASEUKR-UHFFFAOYSA-N 0.000 description 1
- ITMCEJHCFYSIIV-UHFFFAOYSA-N triflic acid Chemical compound OS(=O)(=O)C(F)(F)F ITMCEJHCFYSIIV-UHFFFAOYSA-N 0.000 description 1
- BPSIOYPQMFLKFR-UHFFFAOYSA-N trimethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CO[Si](OC)(OC)CCCOCC1CO1 BPSIOYPQMFLKFR-UHFFFAOYSA-N 0.000 description 1
- 239000005051 trimethylchlorosilane Substances 0.000 description 1
- WLOQLWBIJZDHET-UHFFFAOYSA-N triphenylsulfonium Chemical class 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
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 239000005050 vinyl trichlorosilane Substances 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
Classifications
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- 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
- G03F7/09—Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers
- G03F7/11—Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers having cover layers or intermediate layers, e.g. subbing layers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G12/00—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
- C08G12/02—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes
- C08G12/26—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with heterocyclic compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G16/00—Condensation polymers of aldehydes or ketones with monomers not provided for in the groups C08G4/00 - C08G14/00
- C08G16/02—Condensation polymers of aldehydes or ketones with monomers not provided for in the groups C08G4/00 - C08G14/00 of aldehydes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G16/00—Condensation polymers of aldehydes or ketones with monomers not provided for in the groups C08G4/00 - C08G14/00
- C08G16/02—Condensation polymers of aldehydes or ketones with monomers not provided for in the groups C08G4/00 - C08G14/00 of aldehydes
- C08G16/025—Condensation polymers of aldehydes or ketones with monomers not provided for in the groups C08G4/00 - C08G14/00 of aldehydes with heterocyclic organic compounds
- C08G16/0268—Condensation polymers of aldehydes or ketones with monomers not provided for in the groups C08G4/00 - C08G14/00 of aldehydes with heterocyclic organic compounds containing nitrogen in the ring
-
- C—CHEMISTRY; METALLURGY
- 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
- C09D161/00—Coating compositions based on condensation polymers of aldehydes or ketones; Coating compositions based on derivatives of such polymers
- C09D161/20—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
- C09D161/26—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with heterocyclic compounds
-
- 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
- G03F7/039—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
- G03F7/09—Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers
- G03F7/091—Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers characterised by antireflection means or light filtering or absorbing means, e.g. anti-halation, contrast enhancement
-
- 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
- G03F7/2051—Exposure without an original mask, e.g. using a programmed deflection of a point source, by scanning, by drawing with a light beam, using an addressed light or corpuscular source
- G03F7/2059—Exposure without an original mask, e.g. using a programmed deflection of a point source, by scanning, by drawing with a light beam, using an addressed light or corpuscular source using a scanning corpuscular radiation beam, e.g. an electron beam
-
- 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
- G03F7/26—Processing photosensitive materials; Apparatus therefor
- G03F7/40—Treatment after imagewise removal, e.g. baking
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/027—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34
- H01L21/0271—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34 comprising organic layers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/027—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34
- H01L21/0271—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34 comprising organic layers
- H01L21/0273—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34 comprising organic layers characterised by the treatment of photoresist layers
- H01L21/0274—Photolithographic processes
Definitions
- the present invention relates to a resist underlayer film-forming composition using an indolocarbazole novolak resin.
- a polymer including a cyclic structure such as novolak has been widely used from the field of fine processing involved in a photoresist and the like to the field of general processing involved in parts for automobiles and houses.
- a polymer has high heat resistance and is applicable to special applications. Therefore, development of the polymer is presently progressed.
- a monomer including a cyclic structure a structure such as benzene, naphthalene, anthracene, pyrene, and fluorene is generally known. It is known that the monomer forms a novolak with a monomer having an aldehyde group.
- microprocessing by lithography using a photoresist composition has been conventionally carried out.
- the microprocessing is a processing method in which a thin film of the photoresist composition is formed on a substrate to be processed such as a silicon wafer, irradiated with active light such as ultraviolet light through a mask pattern on which a pattern of the semiconductor device is formed, and developed, and the substrate to be processed such as a silicon wafer is etched using the obtained photoresist pattern as a protective film.
- active light such as ultraviolet light
- the substrate to be processed such as a silicon wafer is etched using the obtained photoresist pattern as a protective film.
- an increase in degree of integration of the semiconductor device has advanced, the wavelength of used active light tends to shorten from a KrF excimer laser (248 nm) to an ArF excimer laser (193 nm). Therefore, diffuse reflection of active light on the substrate and effects of standing wave are severe problems.
- a resist underlayer film for processing As such a resist underlayer film for processing, a resist underlayer film for lithography having a selection ratio of dry etching rate close to that of the resist, which is different from a conventional resist underlayer film having high etching rate (in which the etching rate is high), a resist underlayer film for lithography having a lower selection ratio of dry etching rate than that of the resist, and a resist underlayer film for lithography having a lower selection ratio of dry etching rate than that of the semiconductor substrate are required.
- a resist underlayer film-forming composition using carbazole is exemplified (see Patent Documents 1, 2, 3, and 4).
- the present invention provides a resist underlayer film-forming composition used for a lithography process in production of a semiconductor device using an indolocarbazole novolak resin.
- the present invention provides a resist underlayer film for lithography that does not cause intermixing with a resist layer, has high dry etching resistance and high heat resistance, and generates a low amount of sublimate. Further, the present invention can impart a performance of effectively absorbing reflected light from a substrate during use of irradiated light in microprocessing.
- the present invention also provides a method for forming a resist pattern using the resist underlayer film-forming composition.
- A is a divalent group having at least two amino groups, the group is derived from a compound having a condensed ring structure and an aromatic group for substituting a hydrogen atom on the condensed ring
- B 1 and B 2 are each independently a hydrogen atom, an alkyl group, a benzene ring group, a condensed ring group, or a combination thereof, or B 1 and B 2 may form a ring with a carbon atom bonded to B 1 and B 2 ).
- a third aspect of the present invention is the resist underlayer film-forming composition according to the second aspect, wherein the aromatic group for substituting a hydrogen atom on a condensed ring of the compound having an indolocarbazole structure is a phenyl group.
- a fourth aspect of the present invention is the resist underlayer film-forming composition according to the first aspect, wherein A is a divalent group derived from a compound of formula (2):
- R 1 and R 2 are each independently a hydrogen atom, a C 1-10 alkyl group, or a C 6-40 aryl group).
- a sixth aspect of the present invention is the resist underlayer film-forming composition according to any one of the first to fifth aspects, further comprising a crosslinker.
- a seventh aspect of the present invention is the resist underlayer film-forming composition according to any one of the first to sixth aspects, further comprising an acid and/or an acid generator.
- An eight aspect of the present invention is a method for producing a resist underlayer film obtained by applying the resist underlayer film-forming composition according to any one of the first to seventh aspects to a semiconductor substrate, followed by baking.
- a ninth aspect of the present invention is a method for producing a semiconductor device comprising steps of forming a resist underlayer film on a semiconductor substrate from the resist underlayer film-forming composition according to any one of the first to seventh aspects, forming a resist film on the resist underlayer film, irradiating the resist film with light or an electron beam followed by development, to form a resist pattern, etching the resist underlayer film through the formed resist pattern, and processing the semiconductor substrate through the patterned resist underlayer film.
- a tenth aspect of the present invention is a method for producing a semiconductor device comprising steps of forming a resist underlayer film on a semiconductor substrate from the resist underlayer film-forming composition according to any one of the first to seventh aspects, forming a hard mask on the resist underlayer film, forming a resist film on the hard mask, irradiating the resist film with light or an electron beam followed by development, to form a resist pattern, etching the hard mask through the formed resist pattern, etching the resist underlayer film through the patterned hard mask, and processing the semiconductor substrate through the patterned resist underlayer film.
- An eleventh aspect of the present invention is a polymer having a unit structure of formula (1):
- R 1 and R 2 are each independently a hydrogen atom, a C 1-10 alkyl group, or a C 6-40 aryl group
- B 1 and B 2 are each independently a hydrogen atom, an alkyl group, a benzene ring group, a condensed ring group, or a combination thereof, or B 1 and B 2 may form a ring with a carbon atom bonded to B 1 and B 2 ].
- a favorable pattern shape of a resist can be formed without intermixing of an upper layer part of a resist underlayer film with a layer covering the upper layer part.
- an excellent resist underlayer film having a selection ratio of dry etching rate close to that of a resist, a selection ratio of dry etching rate lower than that of the resist, and a selection ratio of dry etching rate lower than that of a semiconductor substrate can be provided.
- a processed substrate e.g., a thermal silicon oxide film, silicon nitride film, polysilicon film, or the like on the substrate
- a processed substrate has sufficient etching resistance.
- the film thickness of the resist is decreased.
- a process in which the resist pattern is transferred to an underlayer film thereof by an etching process and a substrate is processed using the underlayer film as a mask and a process in which the resist pattern is transferred to an underlayer film thereof by an etching process, a step of transferring the pattern transferred to the underlayer film to an underlayer film thereof using a different gas composition is repeated, and a substrate is finally processed.
- the resist underlayer film of the present invention and a composition for forming the resist underlayer film are effective for the processes.
- a resist underlayer film obtained by curing the resist underlayer film-forming composition of the present invention has high heat resistance, thermal deterioration does not occur due to the accumulated vapor-deposited substance.
- the thermal stability is high, as described above, and generation of decomposed substance (sublimate) during baking can be suppressed. Therefore, contamination of a film of upper layer can be prevented, and a margin of temperature can be imparted in a baking step.
- the resist underlayer film of the present invention can be used as a flattened film, a resist underlayer film, a film for preventing contamination of a resist layer, or a film having a dry etching selectivity.
- a resist pattern can be easily formed with high precision in a lithography process for production of a semiconductor device.
- the present invention relates to a polymer having a unit structure of formula (1), and a resist underlayer film-forming composition containing the polymer having the unit structure of formula (1).
- the resist underlayer film-forming composition contains the polymer and a solvent.
- the resist underlayer film-forming composition may contain a crosslinker and an acid, and if necessary, an additive such as an acid generator and a surfactant.
- the solid content of the composition is 0.1 to 70% by mass, or 0.1 to 60% by mass.
- the solid content is a content ratio of all components other than the solvent in the resist underlayer film-forming composition.
- the solid content may contain the polymer in an amount of 1 to 100% by mass, 1 to 99.9% by mass, or 50 to 99.9% by mass.
- the polymer used in the present invention has a weight average molecular weight of 600 to 1,000,000, or 600 to 200,000.
- A is a divalent group having at least two amino groups, the group derived from a compound having a condensed ring structure and an aromatic group for substituting a hydrogen atom on the condensed ring
- B 1 and B 2 are each independently a hydrogen atom, an alkyl group, a benzene ring group, a condensed ring group, or a combination thereof, or may form a ring with a carbon atom bonded to B 1 and B 2 .
- A be a divalent group having at least two secondary amino groups, the group derived from a compound having a condensed ring structure and an aromatic group for substituting a hydrogen atom on the condensed ring.
- A may be a divalent group derived from a compound having an indolocarbazole structure.
- Examples of an aromatic group for substituting a hydrogen atom on a condensed ring of the indolocarbazole structure include phenyl group, naphthyl group, anthryl group, and pyrene group.
- the phenyl group can be preferably used.
- a divalent group derived from a compound of formula (2) may be used as A.
- the polymer having the unit structure of formula (1) is a novel polymer.
- the polymer is an excellent component for the resist underlayer film-forming composition of the present invention.
- the compound of formula (2) is diphenyl indolocarbazole.
- the compound include a derivative of diphenyl indolocarbazole that has a substituent for substituting a hydrogen atom on a nitrogen atom.
- the diphenyl indolocarbazole can be obtained by a reaction of indole with benzil in an amount of 1 mol relative to 2 mol of indole in the presence of an acid catalyst.
- an organic sulfonic acid such as methanesulfonic acid, p-toluenesulfonic acid, and p-toluenesulfonic acid monohydrate can be preferably used. Synthesis can be carried out under a reflux using a hydrocarbon solvent such as toluene at a temperature of about 140 to 180° C. for 50 to 20 hours.
- R 1 and R 2 may be each independently a hydrogen atom, a C 1-10 alkyl group, or a C 6-40 aryl group. In particular, a hydrogen atom may be adopted.
- Examples of the C 1-10 alkyl group include methyl group, ethyl group, n-propyl group, i-propyl group, cyclopropyl group, n-butyl group, i-butyl group, s-butyl group, t-butyl group, cyclobutyl group, 1-methyl-cyclopropyl group, 2-methyl-cyclopropyl group, n-pentyl group, 1-methyl-n-butyl group, 2-methyl-n-butyl group, 3-methyl-n-butyl group, 1,1-dimethyl-n-propyl group, 1,2-dimethyl-n-propyl group, 2,2-dimethyl-n-propyl group, 1-ethyl-n-propyl group, cyclopentyl group, 1-methyl-cyclobutyl group, 2-methyl-cyclobutyl group, 3-methyl-cyclobutyl group, 1,2-dimethyl-cyclopropyl group, 2,3-di
- Examples of the C 6-40 aryl group include phenyl group, o-methylphenyl group, m-methylphenyl group, p-methylphenyl group, o-chlorophenyl group, m-chlorophenyl group, p-chlorophenyl group, o-fluorophenyl group, p-fluorophenyl group, o-methoxyphenyl group, p-methoxyphenyl group, p-nitrophenyl group, p-cyanophenyl group, ⁇ -naphthyl group, ⁇ -naphthyl group, o-biphenyl group, m-biphenyl group, p-biphenyl group, 1-anthryl group, 2-anthryl group, 9-anthryl group, 1-phenanthryl group, 2-phenanthryl group, 3-phenanthryl group, 4-phenanthryl group, 9-phenanthryl group, and pyrene
- B 1 and B 2 are each independently a hydrogen atom, an alkyl group, a benzene ring group, a condensed ring group, or a combination thereof, or B 1 and B 2 may form a ring with a carbon atom bonded to B 1 and B 2 .
- the combination thereof herein means a group including a combination of an alkyl group and a benzene ring group or a condensed ring group.
- the group may be a benzyl group, a methyl anthracene group, or the like.
- B 1 and B 2 are each a group derived from an aldehyde or a ketone having a hydrogen atom, an alkyl group, a benzene ring group, or a condensed ring group, which is a material in production of the polymer having the unit structure of formula (1).
- B 1 and B 2 form a novolak resin with a compound providing a moiety corresponding to A.
- the alkyl group is the C 1-10 alkyl group described above.
- the condensed ring group is a condensed ring group corresponding to the C 10-40 aryl group described above. Examples thereof include naphthyl group, anthryl group, pyrene group, and derivatives thereof.
- examples of the aldehyde as a material providing the groups of B 1 and B 2 in formula (1) include formaldehyde.
- examples of the aldehyde include acetaldehyde, ethylaldehyde, and isobutylaldehyde.
- examples of the aldehyde include benzaldehyde.
- examples of the aldehyde include naphthyladlehyde, anthrylaldehyde, and pyrenecarboxyaldehyde.
- examples of the aldehyde include phenylacetaldehyde.
- a case where B 1 and B 2 form a ring with a carbon atom bonded to B 1 and B 2 corresponds a case of using a ketone in production of the polymer having the unit structure of formula (1).
- the ketone is diaryl ketone or alkylaryl ketone. Examples thereof include diphenyl ketone, phenyl naphthyl ketone, dinaphtyl ketone, phenyl tolyl ketone, ditolyl ketone, 9-fluorenone, and methylphenyl ketone.
- the acid catalyst used in a condensation reaction in production of the polymer having the unit structure of formula (1) for example, a mineral acid such as sulfuric acid, phosphoric acid, and perchloric acid, an organic sulfonic acid such as methanesulfonic acid, p-toluenesulfonic acid, and p-toluenesulfonic acid monohydrate, or a carboxylic acid such as formic acid and oxalic acid is used.
- the amount of acid catalyst to be used is variously selected depending on the kind of used acid. The amount is usually 0.001 to 10,000 parts by mass, preferably 0.01 to 1,000 parts by mass, and more preferably 0.1 to 100 parts by mass, relative to 100 parts by mass of a compound providing a moiety corresponding to A of formula (1).
- the condensation reaction can be carried out without a solvent, but the concentration reaction is usually carried out using a solvent. Any solvent can be used as long as it does not inhibit the reaction. Examples thereof include cyclic ethers such as tetrahydrofuran and dioxane, propylene glycol monomethyl ether, and propylene glycol monomethyl ether acetate.
- the used acid catalyst is, for example, a liquid like formic acid, it can also act as the solvent.
- the reaction temperature in the condensation is usually 40° C. to 200° C.
- the reaction time is variously selected depending on the reaction temperature, and is usually about 30 minutes to about 50 hours.
- the weight average molecular weight Mw of the polymer obtained as described above is usually 600 to 1,000,000 or 600 to 200,000.
- the polymer can be mixed with another polymer in an amount of 30% by mass or less relative to the total polymer and used.
- Examples of the other polymer include a polyacrylate compound, a polymethacrylate compound, a polyacrylamide compound, a polymethacrylamide compound, a polyvinyl compound, a polystyrene compound, a polymaleimide compound, a polymaleic acid anhydride, and a polyacrylonitrile compound.
- the resist underlayer film-forming composition of the present invention may contain a crosslinker component.
- the crosslinker include a melamine-based crosslinker, a substituted urea-based crosslinker, and melamine- and substituted urea-polymer-based crosslinkers.
- a crosslinker having at least two crosslinking-forming substituents is preferable.
- Examples thereof include compounds such as methoxymethylated glycoluril, butoxymethylated glycoluril, methoxymethylated melamine, butoxymethylated melamine, methoxymethylated benzoguanamine, butoxymethylated benzoguanamine, methoxymethylated urea, butoxymethylated urea, methoxymethylated thiourea, and butoxymethylated thiourea.
- a condensate of the compounds may be also used.
- crosslinker a crosslinker having high heat resistance
- a compound containing a crosslinking-forming substituent having an aromatic ring group (e.g., benzene ring and naphthalene ring) in the molecule may be preferably used.
- Examples of the compound include a compound having a partial structure of the following formula (3) and a polymer and an oligomer having a repeating unit of the following formula (4).
- R 3 and R 4 are each independently a hydrogen atom, a C 1-10 alkyl group, or a C 6-20 aryl group, n1 is an integer of 1 to 4, n2 is an integer of 1 to (5-n1), and (n1+n2) is an integer of 2 to 5.
- R 5 is a hydrogen atom or a C 1-10 alkyl group
- R 6 is a C 1-10 alkyl group
- n3 is an integer of 1 to 4
- n4 is an integer of 0 to (4-n3)
- (n3+n4) is an integer of 1 to 4.
- the oligomer and the polymer in which the number of repeating unit structures falls within a range of 2 to 100 or 2 to 50 may be used.
- the alkyl group and the aryl group can be exemplified by the above-described alkyl groups and aryl groups.
- Examples of the compound of formula (3) and the polymer and oligomer of formula (4) include as follows.
- the compounds described above are available as products available from Asahi Organic Chemicals Industry Co., Ltd., and Honshu Chemical Industry Co., Ltd.
- the compound of formula (4-21) is available as trade name TM-BIP-A available from Asahi Organic Chemicals Industry Co., Ltd.
- the amount of crosslinker to be added varies depending on a coating solvent to be used, an underlying substrate to be used, a solution viscosity to be required, and a film form to be required.
- the amount is 0.001 to 80% by mass, preferably 0.01 to 50% by mass, and further preferably 0.05 to 40% by mass, relative to the total solid content.
- the crosslinker may cause a cross-linking reaction due to self-condensation. However, when the polymer in the present invention has a crosslinkable substituent, the crosslinker may cause a cross-linking reaction with the crosslinkable substituent.
- an acidic compound such as p-toluenesulfonic acid, trifluoromethanesulfonic acid, pyridinium p-toluenesulfonic acid, salicylic acid, sulfosalicylic acid, citric acid benzoic acid, hydroxybenzoic acid, and naphthalenecarboxylic acid, and/or a thermal acid generator such as 2,4,4,6-tetrabromocyclohexadienone, benzoin tosylate, 2-nitrobenzyl tosylate, and another organic alkyl sulfonate can be mixed.
- the amount of catalyst to be mixed is 0.0001 to 20% by mass, preferably 0.0005 to 10% by mass, and further preferably 0.01 to 3% by mass, relative to the total solid content.
- a coating underlayer film-forming composition for lithography of the present invention may contain a photoacid generator so that the acidity thereof coincides with that of a photoresist covering an upper layer in a lithography step.
- the photoacid generator include onium salt-based photoacid generators such as bis(4-tert-butylphenyl)iodonium trifluoromethanesulfonate and triphenylsulfonium trifluoromethanesulfonate, halogen-containing compound-based photoacid generators such as phenyl-bis(trichloromethyl)-s-triazine, and sulfonic acid compound-based photoacid generators such as benzoin tosylate, and N-hydroxysuccinimide trifluoromethanesulfonate.
- the amount of the photoacid generator is 0.2 to 10% by mass, and preferably 0.4 to 5% by mass, relative to the total solid content.
- the resist underlayer film-forming composition for lithography of the present invention can contain a light absorber, a rheology modifier, an adhesive adjuvant, a surfactant, or the like, if necessary.
- the light absorber As the light absorber, a commercially available light absorber described in “Kogyoyoshikiso no gijutsu to shijo” (CMC Publishing Co., Ltd.) or “Senryo binran” (edited by The Society of Synthetic Organic Chemistry, Japan.), for example, C. I. Disperse Yellow 1, 3, 4, 5, 7, 8, 13, 23, 31, 49, 50, 51, 54, 60, 64, 66, 68, 79, 82, 88, 90, 93, 102, 114, or 124; C. I. Disperse Orange 1, 5, 13, 25, 29, 30, 31, 44, 57, 72, or 73; C. I.
- the light absorber is usually mixed in an amount of 10% by mass or less, and preferably 5% by mass or less, relative to the total solid content of the resist underlayer film-forming composition for lithography.
- the rheology modifier is added to mainly improve the flowability of the resist underlayer film-forming composition, and in particular, to improve the film thickness uniformity of a resist underlayer film and enhance the packing properties of the inside of holes with the resist underlayer film-forming composition in a baking step.
- phthalic acid derivatives such as dimethyl phthalate, diethyl phthalate, diisobutyl phthalate, dihexyl phthalate, and butylisodecyl phthalate
- adipic acid derivatives such as di-n-butyl adipate, diisobutyl adipate, diisooctyl adipate, and octyldecyl adipate
- maleic acid derivatives such as di-n-butyl maleate, diethyl maleate, and dinonyl maleate
- oleic acid derivatives such as methyl oleate, butyl oleate, and tetrahydrofurfuryl oleate
- stearic acid derivatives such as n-butyl stearate and glyceryl stearate.
- the rheology modifier is usually mixed in an amount of less than 30% by mass relative to the total solid content of the resist underlayer film
- the adhesive adjuvant is added to mainly improve the adhesion of a substrate or a resist to the resist underlayer film-forming composition, and in particular, to prevent peeling of the resist in development.
- Specific examples thereof include chlorosilanes such as trimethylchlorosilane, dimethylvinylchlorosilane, methyl diphenylchlorosilane, and chloromethyldimethylchlorosilane, alkoxysilanes such as trimethylmethoxysilane, dimethyldiethoxysilane, methyldimethoxysilane, dimethylvinylethoxysilane, diphenyldimethoxysilane, and phenyltriethoxysilane, silazanes such as hexamethyldisilazane, N,N′-bis(trimethylsilyl)urea, dimethyltrimethylsilylamine, and trimethylsilyl imidazole, silanes such as vinyltrichlorosilane, ⁇ -ch
- a surfactant can be mixed to further improve the coating properties against unevenness of a surface without generating pinholes, striation, and the like.
- the surfactant include nonionic surfactants including polyoxyethylene alkyl ethers such as polyoxyethylene lauryl ether, polyoxyethylene stearyl ether, polyoxyethylene cetyl ether, and polyoxyethylene oleyl ether, polyoxyethylene alkylaryl ethers such as polyoxyethylene octylphenol ether and polyoxyethylene nonylphenol ether; polyoxyethylene-polyoxypropylene block copolymers; sorbitan fatty acid esters such as sorbitan monolaurate, sorbitan monopalmitate, sorbitan monostearate, sorbitan monooleate, sorbitan trioleate, and sorbitan tristearate, and polyoxyethylene sorbitan fatty acid esters such as polyoxyethylene sorbit
- the amount of surfactant to be mixed is usually 2.0% by mass or less, and preferably 1.0% by mass or less, relative to the total solid content of the resist underlayer film-forming composition for lithography of the present invention.
- the surfactant may be added alone, or two or more kinds thereof may be added in combination.
- ethylene glycol monomethyl ether ethylene glycol monoethyl ether, methyl cellosolve acetate, ethyl cellosolve acetate, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, propylene glycol, propylene glycol monomethyl ether, propylene glycol monomethyl ether acetate, propylene glycol monoethyl ether, propylene glycol monoethyl ether acetate, propylene glycol propyl ether acetate, toluene, xylene, methyl ethyl ketone, cyclopentanone, cyclohexanone, ethyl 2-hydroxypropionate, ethyl 2-hydroxy-2-methylpropionate, ethyl ethoxyacetate, ethyl hydroxyacetate, toluene, xylene, methyl ethyl ketone, cyclopentanone, cyclohex
- a mixture of solvents having a high boiling point such as propylene glycol monobutyl ether and propylene glycol monobutyl ether acetate can be used.
- solvents propylene glycol monomethyl ether, propylene glycol monomethyl ether acetate, ethyl lactate, butyl lactate, and cyclohexanone are preferable in terms of improved leveling properties.
- the resist underlayer film-forming composition of the present invention is applied to a substrate used in production of a precision integrated circuit element (e.g., a transparent substrate such as a silicon/silicon dioxide coating, a glass substrate, and an ITO substrate) by an appropriate coating means such as a spinner or a coater, baked, and cured to form a coating underlayer film.
- a substrate used in production of a precision integrated circuit element e.g., a transparent substrate such as a silicon/silicon dioxide coating, a glass substrate, and an ITO substrate
- an appropriate coating means such as a spinner or a coater
- the thickness of the resist underlayer film is preferably 0.01 to 3.0 ⁇ m.
- a baking condition after coating is at 80 to 350° C. for 0.5 to 120 minutes.
- a resist is applied directly to the resist underlayer film, or if necessary, a resist is applied after one or more layers of coating material are formed on the coating underlayer film.
- the resist is irradiated with light or an electron beam through a predetermined mask, developed, washed, and dried. Thus, a favorable resist pattern can be obtained.
- post exposure bake PEB
- PEB post exposure bake
- the resist underlayer film at a portion where the resist is developed and removed in the step described above can be removed by dry etching, to form a desired pattern on the substrate.
- the resist used in the present invention is a photoresist or an electron beam resist.
- any of a negative photoresist and a positive photoresist can be used.
- examples thereof may include a positive photoresist including a novolak resin and 1,2-naphthoquinone diazide sulfonic acid ester; a chemically amplified photoresist including a binder having a group that increases an alkali dissolution rate by decomposition with an acid and a photoacid generator; a chemically amplified photoresist including an alkaline soluble binder, a low molecular compound that increases the alkali dissolution rate of the photoresist by decomposition with an acid, and a photoacid generator; a chemically amplified photoresist including a binder having a group that increases the alkali dissolution rate by decomposition with an acid, a low molecular compound that increases the alkali dissolution rate of the photoresist by
- Examples of an electron beam resist applied to the upper part of the resist underlayer film for lithography in the present invention include a composition including a resin having a Si—Si bond in the main chain and an aromatic ring at the terminal and an acid generator that generates an acid by irradiation with an electron beam; and a composition including poly(p-hydroxyl styrene) of which a hydroxyl group is substituted by an organic group containing N-carboxyamine and an acid generator that generates an acid by irradiation with an electron beam.
- the electron beam resist composition In the latter electron beam resist composition, an acid generated from the acid generator by irradiation with an electron beam is reacted with a N-carboxyaminoxy group of a polymer side chain to decompose the polymer side chain into a hydroxyl group.
- the electron beam resist composition exhibits alkaline solubility, and is dissolved in an alkaline developer to form a resist pattern.
- Examples of the acid generator that generates an acid by irradiation with an electron beam include halogenated organic compounds such as 1,1-bis[p-chlorophenyl]-2,2,2-trichloroethane, 1,1-bis[p-methoxyphenyl]-2,2,2-trichloroethane, 1,1-bis[p-chlorophenyl]-2,2-dichloroethane, and 2-chloro-6-(trichloromethyl)pyridine, onium salts such as a triphenyl sulfonium salt and a diphenyliodonium salt, and sulfonate esters such as nitrobenzyl tosylate and dinitrobenzyl tosylate.
- halogenated organic compounds such as 1,1-bis[p-chlorophenyl]-2,2,2-trichloroethane, 1,1-bis[p-methoxyphenyl]-2,2,2-trichloroethane, 1,1-bis[p
- a resist solution is applied and baked at a baking temperature of 70 to 150° C. for a baking time of 0.5 to 5 minutes, to obtain a resist film having a thickness of 10 to 1,000 nm.
- the resist solution, the developer, and a coating material described below can be applied by a spin coating method, a dipping method, a spraying method, or the like. In particular, a spin coating method is preferable.
- Exposure of the resist is carried out through a predetermined mask. For the exposure, a KrF excimer laser (wavelength: 248 nm), an ArF excimer laser (wavelength: 193 nm), EUV light (wavelength: 13.5 nm), an electron beam, or the like, can be used.
- post exposure bake PEB
- a heating temperature and a heating time are appropriately selected from 70° C. to 150° C. and 0.3 to 10 minutes, respectively.
- an organic solvent can be used as a developer in development of the resist. After exposure of the resist, development is carried out by using the developer (solvent). For example, when the positive photoresist is used, the photoresist at an unexposed part is removed to form a pattern of the photoresist.
- Examples of the developer include methyl acetate, butyl acetate, ethyl acetate, isopropyl acetate, amyl acetate, isoamyl acetate, ethyl methoxyacetate, ethyl ethoxyacetate, propylene glycol monomethyl ether acetate, ethylene glycol monoethyl ether acetate, ethylene glycol monopropyl ether acetate, ethylene glycol monobutyl ether acetate, ethylene glycol monophenyl ether acetate, diethylene glycol monomethyl ether acetate, diethylene glycol monopropyl ether acetate, diethylene glycol monoethyl ether acetate, diethylene glycol monophenyl ether acetate, diethylene glycol monobutyl ether acetate, 2-methoxybutyl acetate, 3-methoxybutyl acetate, 4-methoxybutyl acetate, 3-methyl-3-methoxy
- a semiconductor device can be produced by steps of forming a resist underlayer film on a semiconductor substrate from the resist underlayer film-forming composition of the present invention, forming a resist film on the resist underlayer film, irradiating the resist film with light or an electron beam followed by development, to form a resist pattern, etching the resist underlayer film through the formed resist pattern, and processing the semiconductor substrate through the patterned resist underlayer film.
- a resist underlayer film for such a process As a resist underlayer film for such a process, a resist underlayer film for lithography having a selection ratio of dry etching rate close to that of the resist, which is different from a conventional resist underlayer film having a high etching rate, a resist underlayer film for lithography having a smaller selection ratio of dry etching rate than that of the resist, and a resist underlayer film for lithography having a smaller selection ratio of dry etching rate than that of the semiconductor substrate are required.
- an anti-reflective performance may be imparted, and the resist underlayer film may have a function of a conventional anti-reflective coating.
- a process of making the resist pattern and the resist underlayer film finer by dry etching of the resist underlayer film than the pattern width in resist development began to be also used.
- a resist underlayer film having a selection ratio of dry etching close to that of the resist, which is different from the conventional anti-reflective coating having a high etching rate, is required as the resist underlayer film for such a process.
- an anti-reflective performance may be imparted, and the resist underlayer film may have the function of the conventional anti-reflective coating.
- the resist underlayer film of the present invention is formed on the substrate, and the resist may be applied directly to the resist underlayer film, or if necessary, the resist may be applied after one or more layers of coating material are formed on the resist underlayer film.
- the substrate can be processed by selection of appropriate etching gas.
- the semiconductor device can be produced by steps of forming a resist underlayer film on a semiconductor substrate from the resist underlayer film-forming composition of the present invention, forming a hard mask from a coating material containing a silicon component or the like or a hard mask (e.g., from silicon nitride oxide) by vapor deposition on the resist underlayer film, forming a resist film on the hard mask, irradiating the resist film with light or an electron beam followed by development, to form a resist pattern, etching the hard mask through the resist pattern by a halogen-based gas, etching the resist underlayer film through the patterned hard mask by an oxygen-based gas or a hydrogen-based gas, and processing the semiconductor substrate through the patterned resist underlayer film by a halogen-based gas.
- a hard mask from a coating material containing a silicon component or the like or a hard mask (e.g., from silicon nitride oxide) by vapor deposition on the resist underlayer film, forming a resist film on
- the hard mask may be formed from a coating composition containing an organic polymer or an inorganic polymer and a solvent, or the hard mask may be formed by vacuum vapor deposition of an inorganic substance.
- an inorganic substance e.g., silicon nitride oxide
- a deposition substance is accumulated on the surface of the resist underlayer film, and at this time, the surface temperature of the resist underlayer film increases to about 400° C.
- the polymer used for the resist underlayer film-forming composition of the present invention is the polymer having a unit structure containing indolocarbazole, the heat resistance is very high, and thermal degenerate does not occur even due to accumulated deposition substance.
- the resist underlayer film-forming composition for lithography of the present invention has high thermal stability, and can prevent contamination of a film of upper layer by a decomposed substance during baking, and impart a margin of temperature in a baking step.
- a light absorption moiety is incorporated in the skeleton in the resist underlayer film-forming composition for lithography of the present invention and a substance is therefore not diffused in the photoresist during heating and drying, and the light absorption moiety has sufficiently high light absorption performance. Accordingly, the resist underlayer film-forming composition has a high anti-reflective effect.
- the resist underlayer film-forming composition for lithography of the present invention can be used for a film having a function of preventing reflection of light depending on a process condition, and a function of preventing an interaction between the substrate and the photoresist or an adverse influence on the substrate of a substance produced during exposure to a material used for the photoresist or the photoresist.
- the obtained precipitate was filtered by suction, and the filtered product was dried at 60° C. overnight under reduced pressure. As a result, 2.51 g of resin was obtained as a black powder.
- the resulting polymer corresponded to formula (1-1).
- the weight average molecular weight Mw measured by GPC in terms of polystyrene was 5,900 and the polydispersity index Mw/Mn was 2.19.
- the collected filtrate was added dropwise to a methanol solution, resulting in reprecipitation.
- the obtained precipitate was filtered by suction, and the filtered product was dried at 60° C. overnight under reduced pressure.
- 6.42 g of resin was obtained as a gray powder.
- the resulting polymer corresponded to formula (1-2).
- the weight average molecular weight Mw measured by GPC in terms of polystyrene was 16,100 and the polydispersity index Mw/Mn was 3.12.
- the collected filtrate was added dropwise to a methanol solution, resulting in reprecipitation.
- the obtained precipitate was filtered by suction, and the filtered product was dried at 60° C. overnight under reduced pressure.
- 6.58 g of resin was obtained as a gray powder.
- the resulting polymer corresponded to formula (1-3).
- the weight average molecular weight Mw measured by GPC in terms of polystyrene was 7,500 and the polydispersity index Mw/Mn was 2.02.
- the collected filtrate was added dropwise to a methanol solution, resulting in reprecipitation.
- the obtained precipitate was filtered by suction, and the filtered product was dried at 60° C. overnight under reduced pressure.
- the resulting polymer corresponded to formula (1-5).
- the weight average molecular weight Mw measured by GPC in terms of polystyrene was 3,100 and the polydispersity index Mw/Mn was 1.51.
- the collected filtrate was added dropwise to a methanol solution, resulting in reprecipitation.
- the obtained precipitate was filtered by suction, and the filtered product was dried at 60° C. overnight under reduced pressure.
- 71.6 g of carbazole resin was obtained as a blue powder.
- the resulting polymer corresponded to formula (5-1).
- the weight average molecular weight Mw measured by GPC in terms of polystyrene was 2,600 and the polydispersity index Mw/Mn was 1.62.
- the solutions of the resist underlayer film-forming compositions prepared in Examples 1 to 4 and Comparative Example 1 were each applied to a silicon wafer using a spin coater, baked on a hot plate at 240° C. for 1 minute, and then baked at 400° C. for 1 minute, to form a resist underlayer film (thickness: 0.08 ⁇ m).
- the resist underlayer film was immersed in ethyl lactate, propylene glycol monomethyl ether, propylene glycol monomethyl ether acetate, and cyclohexanone, which were a solvent used for a resist.
- the resist underlayer films were insoluble in the solvents.
- the solutions of the resist underlayer film-forming compositions prepared in Examples 1 to 4 and Comparative Example 1 were each applied to a silicon wafer using a spin coater, baked on a hot plate at 240° C. for 1 minute, and then baked at 400° C. for 1 minute (in Examples 10 to 12, at 400° C. for 2 minutes), to form a resist underlayer film (thickness: 0.05 ⁇ m).
- the refractive index (n value) and the light absorption coefficient (k value, also referred to as extinction coefficient) of the resist underlayer film were measured at a wavelength of 193 nm and 248 nm using a spectroscopic ellipsometer. The results are shown in Table 1.
- Example 1 Film baked at 400° C. 1.52/0.69 1.70/0.56
- Example 2 Film baked at 400° C. 1.55/0.66 1.67/0.41
- Example 3 Film baked at 400° C. 1.48/0.57 1.74/0.42
- Example 4 Film baked at 400° C. 1.52/0.66 1.66/0.44 Comparative Film baked at 400° C. 1.46/0.57 1.72/0.65
- Example 1 Film baked at 400° C. 1.52/0.69 1.70/0.56
- Example 2 Film baked at 400° C. 1.55/0.66 1.67/0.41
- Example 3 Film baked at 400° C. 1.48/0.57 1.74/0.42
- Example 4 Film baked at 400° C. 1.52/0.66 1.66/0.44 Comparative Film baked at 400° C. 1.46/0.57 1.72/0.65
- Example 1 Film baked at 400° C. 1.52/0.69 1.70/0.56
- Example 2 Film baked at 400° C. 1.55/0.66 1.67/0.41
- Example 3 Film baked at 400° C. 1.48
- the solutions of the resist underlayer film-forming compositions prepared in Examples 1 to 4 and Comparative Example 1 were each applied to a silicon wafer using a spin coater, baked on a hot plate at 240° C. for 1 minute, and then baked at 400° C. for 1 minute, to form a resist underlayer film (thickness: 0.20 ⁇ m). Baking at 240° C. was not carried out and baking at 400° C. for 90 seconds was carried out. As a result, a resist underlayer film (thickness: 0.20 ⁇ m) was formed. The dry etching rate of each of the resist underlayer films was measured using a CF 4 gas as an etching gas.
- the dry etching rates of the resist underlayer films in Examples 1 to 4 and Comparative Example 1 were compared with each other. The results are shown in Table 2.
- the dry etching rate ratio is a ratio of the dry etching rate of (resist underlayer film)/the dry etching rate of (KrF photoresist).
- Example 1 14.9 64.9 (film baked at 400° C.)
- Example 2 14.4 (film baked at 400° C.)
- Example 3 15.4 (film baked at 400° C.)
- Example 4 14.1 (film baked at 400° C.) Comparative Example 1 28.4 84.6 (film baked at 400° C.)
- the amount of sublimate was measured using a sublimate amount measurement device described in International publication WO2007/111147.
- the resist underlayer film-forming composition prepared in each of Examples 1 to 4 and Comparative Example 1 was applied to a silicon wafer substrate with a diameter of 4 inches.
- a sample for evaluation of baking at 240° C. and a sample for evaluation of baking at 300° C. were not baked.
- a sample for evaluation of baking at 300° C. after a pre-treatment of baking at 240° C. was baked at 240° C. for 1 minute to form a resist underlayer film (thickness: 0.05 ⁇ m).
- the wafer having the resist underlayer film was set in a sublimate amount measurement device integrated with a hot plate, and baked for 120 seconds.
- the sublimate was collected by a quartz crystal microbalance (QCM) sensor, that was, a quartz crystal unit having an electrode.
- QCM quartz crystal microbalance
- the QCM sensor can measure slight mass change using a property in which the frequency of the quartz crystal unit is changed (decreased) depending on the mass of the sublimate that is attached to a surface (electrode) of the quartz crystal unit.
- a detailed measurement protocol is as follows. The temperature of the hot plate of the sublimate amount measurement device was increased to 240° C. or 300° C., the pump flow rate was set to 1 m 3 /s, and the device was left for first 60 seconds for stabilization. Immediately, the wafer covered with the resist underlayer film was placed on the hot plate rapidly from a slide outlet, and the sublimate was collected from a time point of 60 seconds to a time point of 180 seconds (for 120 seconds).
- a flow attachment (detection part) connecting the QCM sensor of the sublimate amount measurement device to a catching funnel part was used without a nozzle.
- a gas flow was poured without being restricted from a flow channel (caliber: 32 mm) of a chamber unit located at a distance of 30 mm from the sensor (quartz crystal unit).
- the QCM sensor in which a material (AlSi) having silicon and aluminum as main components was used as an electrode, the diameter of the quartz crystal unit (sensor diameter) was 14 mm, the diameter of the electrode on a surface of the quartz crystal unit was 5 mm, and the resonant frequency was 9 MHz was used.
- the obtained frequency change of eigenvalue of the quartz crystal unit used in the measurement was converted into grams, and a relationship between the sublimate amount in one wafer having the resist underlayer film and time course was clarified.
- Table 4 the sublimate amounts shown by the measurement device from 0 second to 180 seconds in Examples 1 to 4 and Comparative Example 1 are described as a sublimate amount and a sublimate amount ratio. A number in parentheses is the sublimate amount ratio.
- the sublimate amount ratio is a value standardized on the basis of the amount of sublimate generated from the underlayer film (film baked at 300° C.) of Comparative Example 1 as 1.
- Example 1 During baking at 240° C. 14 ng (0.01)
- Example 1 During baking at 300° C. 67 ng (0.05) after pre-treatment of baking at 240° C.
- Example 1 During baking at 300° C. 64 ng (0.05)
- Example 2 During baking at 240° C. 0 ng (0.00)
- Example 2 During baking at 300° C. 65 ng (0.05) after pre-treatment of baking at 240° C.
- Example 2 During baking at 300° C. 131 ng (0.11)
- Example 3 During baking at 240° C. 28 ng (0.02)
- Example 3 During baking at 300° C. 82 ng (0.07) after pre-treatment of baking at 240° C.
- Example 3 During baking at 300° C.
- Example 4 During baking at 240° C. 740 ng (0.61)
- Example 4 During baking at 300° C. 350 ng (0.29) after pre-treatment of baking at 240° C.
- Example 4 During baking at 300° C. 301 ng (0.25) Comparative During baking at 240° C. 719 ng (0.59)
- Example 1 Comparative During baking at 300° C. 696 ng (0.57)
- Example 1 after pre-treatment of baking at 240° C. Comparative During baking at 300° C. 1219 ng (1.0)
- Example 1 The solutions of the resist underlayer film-forming compositions prepared in Example 1 and Comparative Example 1 were each applied to a silicon wafer using a spin coater, baked on a hot plate at 240° C. for 1 minute, and then baked at 400° C. for 1 minute, to form a resist underlayer film (thickness: 0.34 ⁇ m).
- the in-plane uniformity was measured, and the results are shown in Table 5.
- the resist underlayer film obtained in Example 1 exhibited high coating uniformity.
- the present invention can provide a resist underlayer film for lithography that does not cause intermixing with a resist layer, has high dry etching resistance and high heat resistance, and generates a low amount of sublimate.
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US17/880,761 Active US11720024B2 (en) | 2015-12-01 | 2022-08-04 | Resist underlayer film-forming composition containing indolocarbazole novolak resin |
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US11300879B2 (en) * | 2016-09-01 | 2022-04-12 | Nissan Chemical Corporation | Resist underlayer film forming composition containing triaryldiamine-containing novolac resin |
US11635691B2 (en) | 2019-07-05 | 2023-04-25 | Shin-Etsu Chemical Co., Ltd. | Composition for forming organic film, substrate for manufacturing semiconductor device, method for forming organic film, patterning process, and polymer |
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- 2016-11-30 JP JP2017554146A patent/JP6781410B2/ja active Active
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- 2016-11-30 US US15/780,657 patent/US20180356732A1/en not_active Abandoned
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11300879B2 (en) * | 2016-09-01 | 2022-04-12 | Nissan Chemical Corporation | Resist underlayer film forming composition containing triaryldiamine-containing novolac resin |
US11635691B2 (en) | 2019-07-05 | 2023-04-25 | Shin-Etsu Chemical Co., Ltd. | Composition for forming organic film, substrate for manufacturing semiconductor device, method for forming organic film, patterning process, and polymer |
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JP6781410B2 (ja) | 2020-11-04 |
KR102634064B1 (ko) | 2024-02-07 |
TWI765872B (zh) | 2022-06-01 |
US20230324802A1 (en) | 2023-10-12 |
TW201732439A (zh) | 2017-09-16 |
KR20180087331A (ko) | 2018-08-01 |
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JPWO2017094780A1 (ja) | 2018-10-18 |
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US20220404707A1 (en) | 2022-12-22 |
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