JP2011512023A - シリコン系ハードマスク組成物(Si−SOH;シリコン系スピンオンハードマスク)およびこれを用いた半導体集積回路デバイスの製造方法 - Google Patents
シリコン系ハードマスク組成物(Si−SOH;シリコン系スピンオンハードマスク)およびこれを用いた半導体集積回路デバイスの製造方法 Download PDFInfo
- Publication number
- JP2011512023A JP2011512023A JP2010542157A JP2010542157A JP2011512023A JP 2011512023 A JP2011512023 A JP 2011512023A JP 2010542157 A JP2010542157 A JP 2010542157A JP 2010542157 A JP2010542157 A JP 2010542157A JP 2011512023 A JP2011512023 A JP 2011512023A
- Authority
- JP
- Japan
- Prior art keywords
- hard mask
- group
- silicon
- tetrabutylammonium
- weight
- 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.)
- Granted
Links
- 239000000203 mixture Substances 0.000 title claims abstract description 62
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 title claims abstract description 54
- 229910052710 silicon Inorganic materials 0.000 title claims abstract description 53
- 239000010703 silicon Substances 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims description 21
- 238000004519 manufacturing process Methods 0.000 title claims description 18
- 239000004065 semiconductor Substances 0.000 title claims description 13
- 229920000642 polymer Polymers 0.000 claims abstract description 40
- 125000003118 aryl group Chemical group 0.000 claims abstract description 28
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 24
- 125000004169 (C1-C6) alkyl group Chemical group 0.000 claims abstract description 20
- 150000001282 organosilanes Chemical class 0.000 claims abstract description 18
- 125000002947 alkylene group Chemical group 0.000 claims abstract description 15
- 125000004429 atom Chemical group 0.000 claims abstract description 9
- 125000005647 linker group Chemical group 0.000 claims abstract description 9
- 239000002904 solvent Substances 0.000 claims abstract description 9
- 125000000524 functional group Chemical group 0.000 claims abstract description 8
- ZFSLODLOARCGLH-UHFFFAOYSA-N isocyanuric acid Chemical group OC1=NC(O)=NC(O)=N1 ZFSLODLOARCGLH-UHFFFAOYSA-N 0.000 claims abstract description 8
- XSQUKJJJFZCRTK-UHFFFAOYSA-N urea group Chemical group NC(=O)N XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 8
- 125000005842 heteroatom Chemical group 0.000 claims abstract description 7
- 125000001183 hydrocarbyl group Chemical group 0.000 claims abstract 3
- 150000001875 compounds Chemical class 0.000 claims description 39
- 238000005530 etching Methods 0.000 claims description 22
- 229920002120 photoresistant polymer Polymers 0.000 claims description 21
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 20
- 239000011248 coating agent Substances 0.000 claims description 14
- 238000000576 coating method Methods 0.000 claims description 14
- 239000000758 substrate Substances 0.000 claims description 13
- 239000003377 acid catalyst Substances 0.000 claims description 11
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 9
- 229910017604 nitric acid Inorganic materials 0.000 claims description 9
- 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 claims description 9
- 125000004400 (C1-C12) alkyl group Chemical group 0.000 claims description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 4
- 239000000654 additive Substances 0.000 claims description 4
- 230000000996 additive effect Effects 0.000 claims description 4
- SHFJWMWCIHQNCP-UHFFFAOYSA-M hydron;tetrabutylazanium;sulfate Chemical compound OS([O-])(=O)=O.CCCC[N+](CCCC)(CCCC)CCCC SHFJWMWCIHQNCP-UHFFFAOYSA-M 0.000 claims description 4
- KJIFKLIQANRMOU-UHFFFAOYSA-N oxidanium;4-methylbenzenesulfonate Chemical compound O.CC1=CC=C(S(O)(=O)=O)C=C1 KJIFKLIQANRMOU-UHFFFAOYSA-N 0.000 claims description 4
- 238000000059 patterning Methods 0.000 claims description 4
- FPGGTKZVZWFYPV-UHFFFAOYSA-M tetrabutylammonium fluoride Chemical compound [F-].CCCC[N+](CCCC)(CCCC)CCCC FPGGTKZVZWFYPV-UHFFFAOYSA-M 0.000 claims description 4
- VZTDIZULWFCMLS-UHFFFAOYSA-N ammonium formate Chemical compound [NH4+].[O-]C=O VZTDIZULWFCMLS-UHFFFAOYSA-N 0.000 claims description 3
- 239000003431 cross linking reagent Substances 0.000 claims description 3
- 239000003381 stabilizer Substances 0.000 claims description 3
- 239000004094 surface-active agent Substances 0.000 claims description 3
- LLNAMUJRIZIXHF-CLFYSBASSA-N (z)-2-methyl-3-phenylprop-2-en-1-ol Chemical compound OCC(/C)=C\C1=CC=CC=C1 LLNAMUJRIZIXHF-CLFYSBASSA-N 0.000 claims description 2
- KUCWUAFNGCMZDB-UHFFFAOYSA-N 2-amino-3-nitrophenol Chemical compound NC1=C(O)C=CC=C1[N+]([O-])=O KUCWUAFNGCMZDB-UHFFFAOYSA-N 0.000 claims description 2
- REAVCZWUMGIGSW-UHFFFAOYSA-M 4-methylbenzenesulfonate;tetrabutylazanium Chemical compound CC1=CC=C(S([O-])(=O)=O)C=C1.CCCC[N+](CCCC)(CCCC)CCCC REAVCZWUMGIGSW-UHFFFAOYSA-M 0.000 claims description 2
- 150000003863 ammonium salts Chemical class 0.000 claims description 2
- JTMZBRWRXFAITF-UHFFFAOYSA-N azane;(7,7-dimethyl-3-oxo-4-bicyclo[2.2.1]heptanyl)methanesulfonic acid Chemical compound [NH4+].C1CC2(CS([O-])(=O)=O)C(=O)CC1C2(C)C JTMZBRWRXFAITF-UHFFFAOYSA-N 0.000 claims description 2
- ARRNBPCNZJXHRJ-UHFFFAOYSA-M hydron;tetrabutylazanium;phosphate Chemical compound OP(O)([O-])=O.CCCC[N+](CCCC)(CCCC)CCCC ARRNBPCNZJXHRJ-UHFFFAOYSA-M 0.000 claims description 2
- 238000006068 polycondensation reaction Methods 0.000 claims description 2
- JRMUNVKIHCOMHV-UHFFFAOYSA-M tetrabutylammonium bromide Chemical compound [Br-].CCCC[N+](CCCC)(CCCC)CCCC JRMUNVKIHCOMHV-UHFFFAOYSA-M 0.000 claims description 2
- MCZDHTKJGDCTAE-UHFFFAOYSA-M tetrabutylazanium;acetate Chemical compound CC([O-])=O.CCCC[N+](CCCC)(CCCC)CCCC MCZDHTKJGDCTAE-UHFFFAOYSA-M 0.000 claims description 2
- GMRIOAVKKGNMMV-UHFFFAOYSA-N tetrabutylazanium;azide Chemical compound [N-]=[N+]=[N-].CCCC[N+](CCCC)(CCCC)CCCC GMRIOAVKKGNMMV-UHFFFAOYSA-N 0.000 claims description 2
- KRRBFUJMQBDDPR-UHFFFAOYSA-N tetrabutylazanium;cyanide Chemical compound N#[C-].CCCC[N+](CCCC)(CCCC)CCCC KRRBFUJMQBDDPR-UHFFFAOYSA-N 0.000 claims description 2
- DPKBAXPHAYBPRL-UHFFFAOYSA-M tetrabutylazanium;iodide Chemical compound [I-].CCCC[N+](CCCC)(CCCC)CCCC DPKBAXPHAYBPRL-UHFFFAOYSA-M 0.000 claims description 2
- ZXUCBXRTRRIBSO-UHFFFAOYSA-L tetrabutylazanium;sulfate Chemical compound [O-]S([O-])(=O)=O.CCCC[N+](CCCC)(CCCC)CCCC.CCCC[N+](CCCC)(CCCC)CCCC ZXUCBXRTRRIBSO-UHFFFAOYSA-L 0.000 claims description 2
- PTMFUWGXPRYYMC-UHFFFAOYSA-N triethylazanium;formate Chemical compound OC=O.CCN(CC)CC PTMFUWGXPRYYMC-UHFFFAOYSA-N 0.000 claims description 2
- UPVCRZBVVOXMDA-UHFFFAOYSA-N trimethylazanium;formate Chemical compound OC=O.CN(C)C UPVCRZBVVOXMDA-UHFFFAOYSA-N 0.000 claims description 2
- CLCSYZQBLQDRQU-UHFFFAOYSA-N 3-[3-(hexadecanoylamino)propyl-dimethylazaniumyl]propane-1-sulfonate Chemical compound CCCCCCCCCCCCCCCC(=O)NCCC[N+](C)(C)CCCS([O-])(=O)=O CLCSYZQBLQDRQU-UHFFFAOYSA-N 0.000 claims 1
- 239000004215 Carbon black (E152) Substances 0.000 claims 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims 1
- MIOPJNTWMNEORI-MHPPCMCBSA-N [(4r)-7,7-dimethyl-3-oxo-4-bicyclo[2.2.1]heptanyl]methanesulfonic acid Chemical compound C1C[C@]2(CS(O)(=O)=O)C(=O)CC1C2(C)C MIOPJNTWMNEORI-MHPPCMCBSA-N 0.000 claims 1
- ILNPUSUNVWETJJ-UHFFFAOYSA-N azanium 2,3,4,5-tetrabutylbenzoate Chemical compound C(CCC)C=1C(=C(C(=C(C(=O)[O-])C1)CCCC)CCCC)CCCC.[NH4+] ILNPUSUNVWETJJ-UHFFFAOYSA-N 0.000 claims 1
- DENRZWYUOJLTMF-UHFFFAOYSA-N diethyl sulfate Chemical compound CCOS(=O)(=O)OCC DENRZWYUOJLTMF-UHFFFAOYSA-N 0.000 claims 1
- 229940008406 diethyl sulfate Drugs 0.000 claims 1
- FDTUVFSBEYKVAP-UHFFFAOYSA-N formic acid;pyridine Chemical compound OC=O.C1=CC=NC=C1 FDTUVFSBEYKVAP-UHFFFAOYSA-N 0.000 claims 1
- 125000000623 heterocyclic group Chemical group 0.000 claims 1
- 229930195733 hydrocarbon Natural products 0.000 claims 1
- SNMZANHSFVMKKA-UHFFFAOYSA-M tetrabutylazanium;formate Chemical compound [O-]C=O.CCCC[N+](CCCC)(CCCC)CCCC SNMZANHSFVMKKA-UHFFFAOYSA-M 0.000 claims 1
- SHRKDVQQQPFSIY-UHFFFAOYSA-M tetrabutylazanium;nitrite Chemical compound [O-]N=O.CCCC[N+](CCCC)(CCCC)CCCC SHRKDVQQQPFSIY-UHFFFAOYSA-M 0.000 claims 1
- WWIYWFVQZQOECA-UHFFFAOYSA-M tetramethylazanium;formate Chemical compound [O-]C=O.C[N+](C)(C)C WWIYWFVQZQOECA-UHFFFAOYSA-M 0.000 claims 1
- 125000000217 alkyl group Chemical group 0.000 abstract description 2
- LLHKCFNBLRBOGN-UHFFFAOYSA-N propylene glycol methyl ether acetate Chemical compound COCC(C)OC(C)=O LLHKCFNBLRBOGN-UHFFFAOYSA-N 0.000 description 24
- 239000000243 solution Substances 0.000 description 24
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 21
- 239000010408 film Substances 0.000 description 21
- 238000006243 chemical reaction Methods 0.000 description 16
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 14
- 239000000463 material Substances 0.000 description 14
- 238000003860 storage Methods 0.000 description 14
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 8
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 7
- 125000003545 alkoxy group Chemical group 0.000 description 7
- 238000004132 cross linking Methods 0.000 description 7
- 229910001873 dinitrogen Inorganic materials 0.000 description 7
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 7
- BFXIKLCIZHOAAZ-UHFFFAOYSA-N methyltrimethoxysilane Chemical compound CO[Si](C)(OC)OC BFXIKLCIZHOAAZ-UHFFFAOYSA-N 0.000 description 7
- 229920005573 silicon-containing polymer Polymers 0.000 description 7
- FOQJQXVUMYLJSU-UHFFFAOYSA-N triethoxy(1-triethoxysilylethyl)silane Chemical compound CCO[Si](OCC)(OCC)C(C)[Si](OCC)(OCC)OCC FOQJQXVUMYLJSU-UHFFFAOYSA-N 0.000 description 7
- ZNOCGWVLWPVKAO-UHFFFAOYSA-N trimethoxy(phenyl)silane Chemical compound CO[Si](OC)(OC)C1=CC=CC=C1 ZNOCGWVLWPVKAO-UHFFFAOYSA-N 0.000 description 7
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-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
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 6
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 6
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 6
- 239000003054 catalyst Substances 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 239000002245 particle Substances 0.000 description 5
- 239000011541 reaction mixture Substances 0.000 description 5
- ARXJGSRGQADJSQ-UHFFFAOYSA-N 1-methoxypropan-2-ol Chemical compound COCC(C)O ARXJGSRGQADJSQ-UHFFFAOYSA-N 0.000 description 4
- YEJRWHAVMIAJKC-UHFFFAOYSA-N 4-Butyrolactone Chemical compound O=C1CCCO1 YEJRWHAVMIAJKC-UHFFFAOYSA-N 0.000 description 4
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 4
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 4
- 238000005229 chemical vapour deposition Methods 0.000 description 4
- LZCLXQDLBQLTDK-UHFFFAOYSA-N ethyl 2-hydroxypropanoate Chemical compound CCOC(=O)C(C)O LZCLXQDLBQLTDK-UHFFFAOYSA-N 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 150000002430 hydrocarbons Chemical group 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 238000012546 transfer Methods 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 3
- 239000007810 chemical reaction solvent Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000007062 hydrolysis Effects 0.000 description 3
- 238000006460 hydrolysis reaction Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- JOLQKTGDSGKSKJ-UHFFFAOYSA-N 1-ethoxypropan-2-ol Chemical compound CCOCC(C)O JOLQKTGDSGKSKJ-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
- FENFUOGYJVOCRY-UHFFFAOYSA-N 1-propoxypropan-2-ol Chemical compound CCCOCC(C)O FENFUOGYJVOCRY-UHFFFAOYSA-N 0.000 description 2
- 229910052581 Si3N4 Inorganic materials 0.000 description 2
- 238000002835 absorbance Methods 0.000 description 2
- 239000006117 anti-reflective coating Substances 0.000 description 2
- 230000003667 anti-reflective effect Effects 0.000 description 2
- 229940116333 ethyl lactate Drugs 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 2
- NHGXDBSUJJNIRV-UHFFFAOYSA-M tetrabutylammonium chloride Chemical compound [Cl-].CCCC[N+](CCCC)(CCCC)CCCC NHGXDBSUJJNIRV-UHFFFAOYSA-M 0.000 description 2
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 2
- WGTYBPLFGIVFAS-UHFFFAOYSA-M tetramethylammonium hydroxide Chemical compound [OH-].C[N+](C)(C)C WGTYBPLFGIVFAS-UHFFFAOYSA-M 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 1
- TUBRCQBRKJXJEA-UHFFFAOYSA-N 3-[hexadecyl(dimethyl)azaniumyl]propane-1-sulfonate Chemical compound CCCCCCCCCCCCCCCC[N+](C)(C)CCCS([O-])(=O)=O TUBRCQBRKJXJEA-UHFFFAOYSA-N 0.000 description 1
- 229910008051 Si-OH Inorganic materials 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- 229910006358 Si—OH Inorganic materials 0.000 description 1
- CIUQDSCDWFSTQR-UHFFFAOYSA-N [C]1=CC=CC=C1 Chemical compound [C]1=CC=CC=C1 CIUQDSCDWFSTQR-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000006482 condensation reaction Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- VAYGXNSJCAHWJZ-UHFFFAOYSA-N dimethyl sulfate Chemical compound COS(=O)(=O)OC VAYGXNSJCAHWJZ-UHFFFAOYSA-N 0.000 description 1
- 238000001312 dry etching Methods 0.000 description 1
- 238000000445 field-emission scanning electron microscopy Methods 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- SHRKDVQQQPFSIY-UHFFFAOYSA-N nitrous acid tetrabutylazanium Chemical compound C(CCC)[N+](CCCC)(CCCC)CCCC.N(=O)O SHRKDVQQQPFSIY-UHFFFAOYSA-N 0.000 description 1
- 150000007530 organic bases Chemical class 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 229920000734 polysilsesquioxane polymer Polymers 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- CVCYODHOXFGRCE-UHFFFAOYSA-N propane-1,2-diol;propyl acetate Chemical compound CC(O)CO.CCCOC(C)=O CVCYODHOXFGRCE-UHFFFAOYSA-N 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 150000003871 sulfonates Chemical class 0.000 description 1
- 150000003460 sulfonic acids Chemical class 0.000 description 1
- WGYONVRJGWHMKV-UHFFFAOYSA-M tetrabutylazanium;benzoate Chemical compound [O-]C(=O)C1=CC=CC=C1.CCCC[N+](CCCC)(CCCC)CCCC WGYONVRJGWHMKV-UHFFFAOYSA-M 0.000 description 1
- -1 tetramethylammonium formate pyridinium formate Chemical class 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Classifications
-
- 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
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/31—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to form insulating layers thereon, e.g. for masking or by using photolithographic techniques; After treatment of these layers; Selection of materials for these layers
- H01L21/3105—After-treatment
- H01L21/311—Etching the insulating layers by chemical or physical means
- H01L21/31144—Etching the insulating layers by chemical or physical means using masks
-
- 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
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/48—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule in which at least two but not all the silicon atoms are connected by linkages other than oxygen atoms
- C08G77/50—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule in which at least two but not all the silicon atoms are connected by linkages other than oxygen atoms by carbon linkages
-
- 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
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/48—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule in which at least two but not all the silicon atoms are connected by linkages other than oxygen atoms
- C08G77/50—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule in which at least two but not all the silicon atoms are connected by linkages other than oxygen atoms by carbon linkages
- C08G77/52—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule in which at least two but not all the silicon atoms are connected by linkages other than oxygen atoms by carbon linkages containing aromatic rings
-
- 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
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Abstract
式1において、x、y、zは、前記重合体中、繰り返し単位(SiO1.5−Y−SiO1.5)、(R3SiO1.5)および(XSiO1.5)のの相対的な比を示し、0.05≦x≦0.9、0.05≦y≦0.9、0≦z≦0.9並びにx+y+z=1を満たし;eおよびfは、それぞれ、前記重合体中2x+y+z個のケイ素(Si)原子数に対する、ケイ素(Si)原子に結合している末端−OH基および−OR基の数の比を示し、0.03≦e≦0.2および0.03≦f≦0.25を満たし;Xは、少なくとも1の置換または非置換の芳香族環を含有するC6〜C30の官能基であり;R3はC1〜C6のアルキル基であり;Yは、芳香族環、置換もしくは非置換の直鎖もしくは分枝鎖のC1〜C20アルキレン基、主鎖に少なくとも1の芳香族環もしくはヘテロ環を含むか、または、主鎖に少なくとも1の尿素基もしくはイソシアヌレート基を含む、C1〜C20のアルキレン基、および、少なくとも1の多重結合を含むC2〜C20の炭化水素基からなる群より選択される連結基であり;R6はC1〜C6のアルキル基である。
Description
本発明は、上述した問題点を解決するための努力によってなされ、本発明の目的は、高いエッチング選択性と保存安定性を有し、表面物性を調節することができるシリコン系スピンオンハードマスク組成物を提供することである。
本発明の一実施形態によれば、末端水酸基(−OH)およびアルコキシ基(-OR)を有し、2つの隣り合うケイ素原子を連結する連結部(linker)を含む、基礎樹脂としてのポリシルセスキオキサンを含む、シリコン系スピンオンハードマスク組成物が提供される。
本発明のハードマスク組成物は優れた保存安定性を有し、エッチング工程中にO2プラズマガスに対して優れた耐エッチング性を有するハードマスクの製造に使用し得る。このハードマスク組成物を用いて製造したハードマスクは、非常に厚さが薄いにもかかわらずパターンの転写が容易である。さらに、ハードマスクとその上層または下層の膜との親和性を向上させるために、ハードマスクの表面親水性を調節できる。また、光を吸収する性質があるため、半導体製造工程の露光工程においてフォトレジストのパターンを正確に形成することに寄与し得る。
本発明は、(a)式1で示される有機シラン重合体:
を含むシリコン系ハードマスク組成物を提供する。
有機シラン重合体は、化学式5、6および7で示される化合物の合計100重量部に対して、化学式5で示される化合物0〜90重量部と、化学式6で示される化合物5〜90重量部、および化学式7で示される化合物5〜90重量部を混合し、この混合物を、0.001〜5重量部の酸触媒の存在下、100〜900重量部の反応溶媒中で反応させて得ることができる。
〔実施例1〕
機械撹拌機、冷却管、滴下ロート、窒素ガス導入管を備えた3リットルの4口フラスコに、メチルトリメトキシシラン449.8g、フェニルトリメトキシシラン41.8gおよび、ビス(トリエトキシシリル)エタン138.4gを、プロピレングリコールモノメチルエーテルアセテート(PGMEA)1470gに溶解させた。この溶液に、硝酸(1000ppm)水溶液162.5gを常温で添加した。この混合物を、50℃で1時間反応させた後、減圧してメタノールおよびエタノールを反応混合物から除去した。反応温度を80℃に維持しながら、反応を5日間継続し、次の式8で示されるシリコーンポリマーを得た:{(SiO1.5−CH2CH2−SiO1.5)0.10(MeSiO1.5)0.846(PhSiO1.5)0.054}(OH)0.05(OMe)0.15(OEt)0.07 (8) (ここで、Meはメチルを、Etはエチルを、Phはフェニルをそれぞれ示す。)
ポリマー2.0gにPGMEA50gを入れて稀釈し、ここにピリジニウムp−トルエンスルホン酸0.002gを添加した。得られた溶液をシリコンウエハ上にスピンコーティングし、60秒間240℃でベーキングし、厚さ500Åのフィルムを形成した。
機械撹拌機、冷却管、滴下ロート、窒素ガス導入管を備えた3リットルの4口フラスコに、メチルトリメトキシシラン265.4g、フェニルトリメトキシシラン28.9gと、ビス(トリエトキシシリル)エタン325.8gをプロピレングリコールモノメチルエーテルアセテート(PGMEA)1470gに溶解させた。硝酸水溶液(1000ppm)150.7gを常温で溶液に添加した。この混合物を50℃で1時間反応させた後、減圧し、メタノールおよびエタノールを反応混合物から除去した。反応温度を50℃に維持しながら、反応を7日間継続し、以下の式9で示されるシリコーンポリマーを得た:{(SiO1.5−CH2CH2−SiO1.5)0.30(MeSiO1.5)0.636(PhSiO1.5)0.064}(OH)0.06(OMe)0.13(OEt)0.09 (9)(ここで、Meはメチルを、Etはエチルを、Phはフェニルをそれぞれ示す。)
ポリマー2.0gをPGMEA50gで稀釈し、ピリジニウムp−トルエンスルホン酸0.002gを添加した。得られた溶液をシリコンウエハ上にスピンコーティングして、60秒間240℃でベーキングし、厚さ500Åのフィルムを形成した。
機械撹拌機、冷却管、滴下ロート、窒素ガス導入管を備えた3リットルの4口フラスコに、メチルトリメトキシシラン146.2g、フェニルトリメトキシシラン37.0gと、ビス(トリエトキシシリル)エタン446.8gをプロピレングリコールモノメチルエーテルアセテート(PGMEA)1470gに溶解させた。この溶液に、硝酸水溶液(1000ppm)143.0gを常温で添加した。この混合物を50℃で1時間反応させた後、減圧し、メタノールおよびエタノールを除去した。反応温度を50℃に維持しながら、反応を3日間継続し、次の式10で示されるシリコーンポリマーを得た: {(SiO1.5−CH2CH2−SiO1.5)0.50(MeSiO1.5)0.426(PhSiO1.5)0.074}(OH)0.04(OMe)0.10(OEt)0.12 (10)(ここで、Meはメチルを、Etはエチルを、Phはフェニルをそれぞれ示す。)
ポリマー2.0gをPGMEA50gで稀釈し、ピリジニウムp−トルエンスルホン酸0.002gを添加した。得られた溶液をシリコンウエハ上にスピンコーティングし、60秒間240℃でベーキングし、厚さ500Åのフィルムを形成した。
機械撹拌機、冷却管、滴下ロートおよび窒素ガス導入管を備えた2リットルの4口フラスコに、メチルトリメトキシシラン271.4g、フェニルトリメトキシシラン58.5gおよびビス(トリエトキシシリル)エタン90.1gを、プロピレングリコールモノメチルエーテルアセテート(PGMEA)980gに溶解させた。この溶液に硝酸水溶液(1000ppm)105.8gを常温で添加した。この混合物を50℃で1時間反応させた後、減圧し、メタノールおよびエタノールを反応混合物から除去した。反応温度を80℃に維持しながら、反応を13日間継続し、次の式11で示されるシリコーンポリマーを得た: {(SiO1.5−CH2CH2−SiO1.5)0.10(MeSiO1.5)0.784(PhSiO1.5)0.116}(OH)0.06(OMe)0.18(OEt)0.03 (11)(ここで、Meはメチルを、Etはエチルを、Phはフェニルをそれぞれ示す。)
ポリマー2.0gをPGMEA50gで稀釈し、ピリジニウムp−トルエンスルホン酸0.002gを添加した。得られた溶液をシリコンウエハ上にスピンコーティングし、60秒間240℃でベーキングし、厚さ500Åのフィルムを形成した。
機械撹拌機、冷却管、滴下ロートおよび窒素ガス導入管を備えた3リットルの4口フラスコに、メチルトリメトキシシラン136.4g、フェニルトリメトキシシラン49.7gおよびビス(トリエトキシシリル)エタン444.0gを、プロピレングリコールモノメチルエーテルアセテート(PGMEA)1470gに溶解させた。この溶液に硝酸水溶液(1000ppm)142.1gを常温で添加した。この混合物を50℃で1時間反応させた後、減圧し、メタノールおよびエタノールを除去した。反応温度を50℃に維持しながら、反応を7日間継続し、次の式12で示されるシリコーンポリマーを得た: {(SiO1.5−CH2CH2−SiO1.5)0.50(MeSiO1.5)0.40(PhSiO1.5)0.10}(OH)0.06(OMe)0.11(OEt)0.11 (12)(ここで、Meはメチルを、Etはエチルを、Phはフェニルをそれぞれ示す。)
ポリマー2.0gをPGMEA50gで稀釈し、ピリジニウムp−トルエンスルホン酸0.002gを添加した。得られた溶液をシリコンウエハ上にスピンコーティングして60秒間240℃でベーキングし、厚さ500Åのフィルムを形成した。
機械撹拌機、冷却管、滴下ロート、窒素ガス導入管を備えた4リットルの4口フラスコに、メチルトリメトキシシラン170.5g、フェニルトリメトキシシラン63.8gおよびビス(トリエトキシシリル)エタン570.8gを、プロピレングリコールモノメチルエーテルアセテート(PGMEA))1890gに溶解させた。この溶液に硝酸水溶液(1000ppm)260.1gを常温で添加した。この反応混合物を50℃で1時間反応させた後、減圧し、メタノールおよびエタノールを反応混合物から除去した。反応温度を50℃に維持しながら、反応を2日間継続し、次の式13で示されるシリコーンポリマーを得た: {(SiO1.5−CH2CH2−SiO1.5)0.50(MeSiO1.5)0.040(PhSiO1.5)0.10}(OH)0.11(OMe)0.08(OEt)0.06 (13))(ここで、Meはメチルを、Etはエチルを、Phはフェニルをそれぞれ示す。)
ポリマー2.0gをPGMEA50gで稀釈し、ピリジニウムp−トルエンスルホン酸0.002gを添加した。得られた溶液をシリコンウエハ上にスピンコーティングして、60秒間240℃でベーキングし、厚さ500Åのフィルムを形成した。
機械撹拌機、冷却管、滴下ロート、窒素ガス導入管を備えた4リットルの4口フラスコに、メチルトリメトキシシラン160.2g、フェニルトリメトキシシラン59.1gおよびビス(トリエトキシシリル)エタン528.5gを、プロピレングリコールモノメチルエーテルアセテート(PGMEA)1750gに溶解させた。この溶液に硝酸水溶液(1000ppm)480.3gを常温で添加した。この混合物を50℃で1時間反応させた後、減圧し、メタノールおよびエタノールを除去した。反応温度を50℃に維持しながら、反応1日間継続し、次の式14で示されるシリコーンポリマーを得た: {(SiO1.5−CH2CH2−SiO1.5)0.50(MeSiO1.5)0.040(PhSiO1.5)0.10}(OH)0.18(OMe)0.04(OEt)0.03 (14)(ここで、Meはメチルを、Etはエチルを、Phはフェニルをそれぞれ示す。)
ポリマー2.0gをPGMEA50gで稀釈し、ピリジニウムp−トルエンスルホン酸0.002gを添加した。得られた溶液をシリコンウエハ上にスピンコーティングして、60秒間240℃でベーキングし、厚さ500Åのフィルムを形成した。
実施例1〜3で製造したフィルムについて、水の接触角を、接触角測定システム(Phoenix300 Plus、SEO社製)で測定した。各フィルムの表面(5点)に、10μlの水を落とした。フィルム表面と水滴とがなす角度を測定した。測定結果は表1に示す。
実施例1および4で形成したフィルムの屈折率(n)と吸光係数(k)を、Ellipsometer(J.A.Woollam社製)を用いて測定した。測定結果は表2に示す。
実施例5〜7で製造した溶液の安定性を試験した。3つの溶液は40℃で30日間保存した。溶液の状態を観察し、コーティング後のフィルムの厚さを測定した。測定結果は表3に示す。
実施例1〜3で製造した各フィルム上に、ArFフォトレジストをコーティングして、110℃で60秒間ベーキングし、ArF露光システム(ASML1250、FN705.0active、NA0.82)を用いて露光をした後、TMAH水溶液(2.38wt%)で現像し、80nmのラインアンドスペースパターンを形成した。パターンの露光量(EL)マージンを露光エネルギーの関数として測定し、パターンの焦点深度(DoF)マージンを光源との距離の関数として測定した。結果は表4に記載する。
実験例4で得られたパターン化された試片を、CFxプラズマ、O2プラズマおよびCFxプラズマを順に連続して用いてドライエッチングした。最後にO2を用いて残っている有機物をすべて除去した後、FE−SEMでエッチングした試片の断面を観察した。結果は表5に示す。
Claims (12)
- (a)式1で示される有機シラン重合体:
(b)溶媒、
を含むことを特徴とするシリコン系(silicon−based)ハードマスク組成物。 - 前記(a)有機シラン重合体は、式2、3および4で示される化合物:
の重縮合物であることを特徴とする請求項1に記載のハードマスク組成物。 - 前記(a)有機シラン重合体は、式5、6および7で示される化合物:
の加水分解物の、酸触媒の存在下での重縮合により調製されることを特徴とする請求項1に記載のハードマスク組成物。 - 前記(a)有機シラン重合体は、重量平均分子量が2,000〜90,000であることを特徴とする請求項1に記載のハードマスク組成物。
- 前記有機シラン重合体は、式5、6および7で示される化合物100重量部に対して、式5で示される化合物0〜90重量部、式6で示される化合物5〜90重量部および式7で示される化合物5〜90重量部を混合し、前記混合物を0.001〜5重量部の酸触媒の存在下で反応させて調製されたことを特徴とする請求項3に記載のハードマスク組成物。
- 前記酸触媒は、硝酸、硫酸、塩酸、p−トルエンスルホン酸一水和物、硫酸ジエチルおよびこれらの組み合わせからなる群より選択されることを特徴とする請求項3に記載のハードマスク組成物。
- 前記(a)有機シラン重合体は、前記ハードマスク組成物100重量部に対して、1〜50重量部の量で存在することを特徴とする請求項1に記載のハードマスク組成物。
- 前記ハードマスク組成物は、ピリジニウムp−トルエンスルホン酸、アミドスルホベタイン−16、(−)−カンファー−10−スルホン酸のアンモニウム塩((−)−camphor−10−sulfonic acid ammonium salt)、ギ酸アンモニウム、ギ酸トリエチルアンモニウム、ギ酸トリメチルアンモニウム、ギ酸テトラメチルアンモニウム、ギ酸ピリジニウム、ギ酸テトラブチルアンモニウム、硝酸テトラメチルアンモニウム、硝酸テトラブチルアンモニウム、酢酸テトラブチルアンモニウム、テトラブチルアンモニウムアジド(tetrabutylammonium azide)、安息香酸テトラブチルアンモニウム、硫酸水素テトラブチルアンモニウム、臭化テトラブチルアンモニウム、塩化テトラブチルアンモニウム、シアン化テトラブチルアンモニウム、フッ化テトラブチルアンモニウム、ヨウ化テトラブチルアンモニウム、硫酸テトラブチルアンモニウム、亜硝酸テトラブチルアンモニウム、p−トルエンスルホン酸テトラブチルアンモニウム、リン酸テトラブチルアンモニウムおよびこれらの混合物からなる群より選択される化合物をさらに含むことを特徴とする請求項1に記載のハードマスク組成物。
- 前記ハードマスク組成物は、架橋剤、ラジカル安定剤および界面活性剤からなる群より選択される少なくとも1の添加剤をさらに含むことを特徴とする請求項1に記載のハードマスク組成物。
- 前記ハードマスク組成物は、架橋剤、ラジカル安定剤および界面活性剤からなる群より選択される少なくとも1の添加剤をさらに含むことを特徴とする請求項8に記載のハードマスク組成物。
- (a)基板上にカーボン系(carbon−based)ハードマスク層を形成する段階と、
(b)前記カーボン系ハードマスク層を、請求項1〜10のいずれか一項に記載のハードマスク組成物でコーティングし、シリコン系ハードマスク層を形成する段階と、
(c)前記シリコン系ハードマスク層上にフォトレジスト層を形成する段階と、
(d)前記フォトレジスト層をマスクを通して部分的に光源からの光に露光する段階と、
(e)前記フォトレジスト層の露光領域を選択的に除去してパターンを形成する段階と、
(f)前記パターン化されたフォトレジスト層をエッチングマスクとして用い、前記パターンをシリコン系ハードマスク層に転写して、シリコン系ハードマスク層をパターン化する段階と、
(g)前記パターン化されたシリコン系ハードマスク層をエッチングマスクとして用い、前記パターンをカーボン系ハードマスク層に転写して、カーボン系ハードマスク層をパターン化する段階と、
(h)前記パターン化されたカーボン系ハードマスク層をエッチングマスクとして用い、前記パターンを基板に転写する段階と、
を含むことを特徴とする半導体集積回路デバイスの製造方法。 - 前記段階(c)に先立って、シリコン系ハードマスク層をコーティングし反射防止膜を形成する段階をさらに含むことを特徴とする請求項11に記載の方法。
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