WO2018235530A1 - 金属アルコキシド化合物、薄膜形成用原料及び薄膜の製造方法 - Google Patents
金属アルコキシド化合物、薄膜形成用原料及び薄膜の製造方法 Download PDFInfo
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- WO2018235530A1 WO2018235530A1 PCT/JP2018/020352 JP2018020352W WO2018235530A1 WO 2018235530 A1 WO2018235530 A1 WO 2018235530A1 JP 2018020352 W JP2018020352 W JP 2018020352W WO 2018235530 A1 WO2018235530 A1 WO 2018235530A1
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- -1 alkoxide compound Chemical class 0.000 title claims abstract description 81
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 76
- 239000002184 metal Substances 0.000 title claims abstract description 75
- 239000010409 thin film Substances 0.000 title claims description 155
- 239000002994 raw material Substances 0.000 title claims description 72
- 238000004519 manufacturing process Methods 0.000 title claims description 30
- 125000004429 atom Chemical group 0.000 claims abstract description 19
- OHSVLFRHMCKCQY-UHFFFAOYSA-N lutetium atom Chemical group [Lu] OHSVLFRHMCKCQY-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910052765 Lutetium Inorganic materials 0.000 claims abstract description 15
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical group [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 claims abstract description 14
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical group [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 claims abstract description 13
- 125000000217 alkyl group Chemical group 0.000 claims abstract description 12
- 125000004432 carbon atom Chemical group C* 0.000 claims abstract description 12
- 229910052746 lanthanum Inorganic materials 0.000 claims abstract description 11
- 229910052727 yttrium Inorganic materials 0.000 claims abstract description 11
- SIXSYDAISGFNSX-UHFFFAOYSA-N scandium atom Chemical group [Sc] SIXSYDAISGFNSX-UHFFFAOYSA-N 0.000 claims abstract description 9
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical group [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 claims abstract description 8
- KBQHZAAAGSGFKK-UHFFFAOYSA-N dysprosium atom Chemical group [Dy] KBQHZAAAGSGFKK-UHFFFAOYSA-N 0.000 claims abstract description 8
- UYAHIZSMUZPPFV-UHFFFAOYSA-N erbium Chemical group [Er] UYAHIZSMUZPPFV-UHFFFAOYSA-N 0.000 claims abstract description 8
- OGPBJKLSAFTDLK-UHFFFAOYSA-N europium atom Chemical group [Eu] OGPBJKLSAFTDLK-UHFFFAOYSA-N 0.000 claims abstract description 8
- UIWYJDYFSGRHKR-UHFFFAOYSA-N gadolinium atom Chemical group [Gd] UIWYJDYFSGRHKR-UHFFFAOYSA-N 0.000 claims abstract description 8
- KJZYNXUDTRRSPN-UHFFFAOYSA-N holmium atom Chemical group [Ho] KJZYNXUDTRRSPN-UHFFFAOYSA-N 0.000 claims abstract description 8
- PUDIUYLPXJFUGB-UHFFFAOYSA-N praseodymium atom Chemical group [Pr] PUDIUYLPXJFUGB-UHFFFAOYSA-N 0.000 claims abstract description 8
- VQMWBBYLQSCNPO-UHFFFAOYSA-N promethium atom Chemical group [Pm] VQMWBBYLQSCNPO-UHFFFAOYSA-N 0.000 claims abstract description 8
- KZUNJOHGWZRPMI-UHFFFAOYSA-N samarium atom Chemical group [Sm] KZUNJOHGWZRPMI-UHFFFAOYSA-N 0.000 claims abstract description 8
- GZCRRIHWUXGPOV-UHFFFAOYSA-N terbium atom Chemical group [Tb] GZCRRIHWUXGPOV-UHFFFAOYSA-N 0.000 claims abstract description 8
- NAWDYIZEMPQZHO-UHFFFAOYSA-N ytterbium Chemical group [Yb] NAWDYIZEMPQZHO-UHFFFAOYSA-N 0.000 claims abstract description 8
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical group [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052706 scandium Inorganic materials 0.000 claims abstract description 6
- 229910052692 Dysprosium Inorganic materials 0.000 claims abstract description 5
- 229910052693 Europium Inorganic materials 0.000 claims abstract description 5
- 229910052688 Gadolinium Inorganic materials 0.000 claims abstract description 5
- 229910052689 Holmium Inorganic materials 0.000 claims abstract description 5
- 229910052779 Neodymium Inorganic materials 0.000 claims abstract description 5
- 229910052777 Praseodymium Inorganic materials 0.000 claims abstract description 5
- 229910052773 Promethium Inorganic materials 0.000 claims abstract description 5
- 229910052772 Samarium Inorganic materials 0.000 claims abstract description 5
- 229910052771 Terbium Inorganic materials 0.000 claims abstract description 5
- 229910052775 Thulium Inorganic materials 0.000 claims abstract description 5
- FRNOGLGSGLTDKL-UHFFFAOYSA-N thulium atom Chemical group [Tm] FRNOGLGSGLTDKL-UHFFFAOYSA-N 0.000 claims abstract description 4
- 150000001875 compounds Chemical class 0.000 claims description 58
- 239000000463 material Substances 0.000 claims description 30
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- 229910052684 Cerium Inorganic materials 0.000 claims description 4
- 229910052691 Erbium Inorganic materials 0.000 claims description 4
- 229910052769 Ytterbium Inorganic materials 0.000 claims description 4
- 150000004703 alkoxides Chemical class 0.000 claims 1
- 238000000034 method Methods 0.000 description 79
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- 239000002243 precursor Substances 0.000 description 37
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- 239000000203 mixture Substances 0.000 description 21
- 230000000052 comparative effect Effects 0.000 description 20
- 238000005755 formation reaction Methods 0.000 description 20
- MRELNEQAGSRDBK-UHFFFAOYSA-N lanthanum(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[La+3].[La+3] MRELNEQAGSRDBK-UHFFFAOYSA-N 0.000 description 20
- 230000008018 melting Effects 0.000 description 19
- 238000002844 melting Methods 0.000 description 19
- 238000005229 chemical vapour deposition Methods 0.000 description 18
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 16
- 238000000151 deposition Methods 0.000 description 16
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- 229910052710 silicon Inorganic materials 0.000 description 15
- 239000010703 silicon Substances 0.000 description 15
- 230000008021 deposition Effects 0.000 description 14
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 11
- 229910052799 carbon Inorganic materials 0.000 description 11
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 11
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- 238000010438 heat treatment Methods 0.000 description 10
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 6
- 239000012535 impurity Substances 0.000 description 6
- 229910003443 lutetium oxide Inorganic materials 0.000 description 6
- MPARYNQUYZOBJM-UHFFFAOYSA-N oxo(oxolutetiooxy)lutetium Chemical compound O=[Lu]O[Lu]=O MPARYNQUYZOBJM-UHFFFAOYSA-N 0.000 description 6
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 description 6
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- QEGNUYASOUJEHD-UHFFFAOYSA-N 1,1-dimethylcyclohexane Chemical compound CC1(C)CCCCC1 QEGNUYASOUJEHD-UHFFFAOYSA-N 0.000 description 4
- 238000005160 1H NMR spectroscopy Methods 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
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- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 4
- WQDUMFSSJAZKTM-UHFFFAOYSA-N Sodium methoxide Chemical compound [Na+].[O-]C WQDUMFSSJAZKTM-UHFFFAOYSA-N 0.000 description 4
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 4
- YRKCREAYFQTBPV-UHFFFAOYSA-N acetylacetone Chemical compound CC(=O)CC(C)=O YRKCREAYFQTBPV-UHFFFAOYSA-N 0.000 description 4
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- 229910017053 inorganic salt Inorganic materials 0.000 description 4
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- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 1
- ZTOMUSMDRMJOTH-UHFFFAOYSA-N glutaronitrile Chemical compound N#CCCCC#N ZTOMUSMDRMJOTH-UHFFFAOYSA-N 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052735 hafnium Inorganic materials 0.000 description 1
- VBJZVLUMGGDVMO-UHFFFAOYSA-N hafnium atom Chemical compound [Hf] VBJZVLUMGGDVMO-UHFFFAOYSA-N 0.000 description 1
- 229910000449 hafnium oxide Inorganic materials 0.000 description 1
- WIHZLLGSGQNAGK-UHFFFAOYSA-N hafnium(4+);oxygen(2-) Chemical compound [O-2].[O-2].[Hf+4] WIHZLLGSGQNAGK-UHFFFAOYSA-N 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- CATSNJVOTSVZJV-UHFFFAOYSA-N heptan-2-one Chemical compound CCCCCC(C)=O CATSNJVOTSVZJV-UHFFFAOYSA-N 0.000 description 1
- NGAZZOYFWWSOGK-UHFFFAOYSA-N heptan-3-one Chemical compound CCCCC(=O)CC NGAZZOYFWWSOGK-UHFFFAOYSA-N 0.000 description 1
- DGCTVLNZTFDPDJ-UHFFFAOYSA-N heptane-3,5-dione Chemical compound CCC(=O)CC(=O)CC DGCTVLNZTFDPDJ-UHFFFAOYSA-N 0.000 description 1
- 150000002391 heterocyclic compounds Chemical class 0.000 description 1
- QAMFBRUWYYMMGJ-UHFFFAOYSA-N hexafluoroacetylacetone Chemical compound FC(F)(F)C(=O)CC(=O)C(F)(F)F QAMFBRUWYYMMGJ-UHFFFAOYSA-N 0.000 description 1
- ZOCHHNOQQHDWHG-UHFFFAOYSA-N hexan-3-ol Chemical compound CCCC(O)CC ZOCHHNOQQHDWHG-UHFFFAOYSA-N 0.000 description 1
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 description 1
- 150000004677 hydrates Chemical class 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000000543 intermediate Substances 0.000 description 1
- 238000007733 ion plating Methods 0.000 description 1
- 229910052741 iridium Inorganic materials 0.000 description 1
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229940035429 isobutyl alcohol Drugs 0.000 description 1
- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 description 1
- 150000002604 lanthanum compounds Chemical class 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 229910001507 metal halide Inorganic materials 0.000 description 1
- 150000005309 metal halides Chemical class 0.000 description 1
- 229910001960 metal nitrate Inorganic materials 0.000 description 1
- 229910052752 metalloid Inorganic materials 0.000 description 1
- 150000002738 metalloids Chemical class 0.000 description 1
- NBTOZLQBSIZIKS-UHFFFAOYSA-N methoxide Chemical compound [O-]C NBTOZLQBSIZIKS-UHFFFAOYSA-N 0.000 description 1
- GYNNXHKOJHMOHS-UHFFFAOYSA-N methyl-cycloheptane Natural products CC1CCCCCC1 GYNNXHKOJHMOHS-UHFFFAOYSA-N 0.000 description 1
- NFWSQSCIDYBUOU-UHFFFAOYSA-N methylcyclopentadiene Chemical compound CC1=CC=CC1 NFWSQSCIDYBUOU-UHFFFAOYSA-N 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- DNIAPMSPPWPWGF-UHFFFAOYSA-N monopropylene glycol Natural products CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 1
- DWFKOMDBEKIATP-UHFFFAOYSA-N n'-[2-[2-(dimethylamino)ethyl-methylamino]ethyl]-n,n,n'-trimethylethane-1,2-diamine Chemical compound CN(C)CCN(C)CCN(C)CCN(C)C DWFKOMDBEKIATP-UHFFFAOYSA-N 0.000 description 1
- LSHROXHEILXKHM-UHFFFAOYSA-N n'-[2-[2-[2-(2-aminoethylamino)ethylamino]ethylamino]ethyl]ethane-1,2-diamine Chemical compound NCCNCCNCCNCCNCCN LSHROXHEILXKHM-UHFFFAOYSA-N 0.000 description 1
- GVWISOJSERXQBM-UHFFFAOYSA-N n-methylpropan-1-amine Chemical compound CCCNC GVWISOJSERXQBM-UHFFFAOYSA-N 0.000 description 1
- XHFGWHUWQXTGAT-UHFFFAOYSA-N n-methylpropan-2-amine Chemical compound CNC(C)C XHFGWHUWQXTGAT-UHFFFAOYSA-N 0.000 description 1
- SLCVBVWXLSEKPL-UHFFFAOYSA-N neopentyl glycol Chemical compound OCC(C)(C)CO SLCVBVWXLSEKPL-UHFFFAOYSA-N 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 239000010955 niobium Substances 0.000 description 1
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 1
- 150000002823 nitrates Chemical class 0.000 description 1
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 1
- WSGCRAOTEDLMFQ-UHFFFAOYSA-N nonan-5-one Chemical compound CCCCC(=O)CCCC WSGCRAOTEDLMFQ-UHFFFAOYSA-N 0.000 description 1
- TVMXDCGIABBOFY-UHFFFAOYSA-N octane Chemical compound CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 description 1
- GJYXGIIWJFZCLN-UHFFFAOYSA-N octane-2,4-dione Chemical compound CCCCC(=O)CC(C)=O GJYXGIIWJFZCLN-UHFFFAOYSA-N 0.000 description 1
- BTNXBLUGMAMSSH-UHFFFAOYSA-N octanedinitrile Chemical compound N#CCCCCCCC#N BTNXBLUGMAMSSH-UHFFFAOYSA-N 0.000 description 1
- OOFGXDQWDNJDIS-UHFFFAOYSA-N oxathiolane Chemical compound C1COSC1 OOFGXDQWDNJDIS-UHFFFAOYSA-N 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000006864 oxidative decomposition reaction Methods 0.000 description 1
- 238000010525 oxidative degradation reaction Methods 0.000 description 1
- 239000011224 oxide ceramic Substances 0.000 description 1
- 229910052574 oxide ceramic Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- UKODFQOELJFMII-UHFFFAOYSA-N pentamethyldiethylenetriamine Chemical compound CN(C)CCN(C)CCN(C)C UKODFQOELJFMII-UHFFFAOYSA-N 0.000 description 1
- GTCCGKPBSJZVRZ-UHFFFAOYSA-N pentane-2,4-diol Chemical compound CC(O)CC(C)O GTCCGKPBSJZVRZ-UHFFFAOYSA-N 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 229960005235 piperonyl butoxide Drugs 0.000 description 1
- 238000005268 plasma chemical vapour deposition Methods 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 229920000166 polytrimethylene carbonate Polymers 0.000 description 1
- XRVCFZPJAHWYTB-UHFFFAOYSA-N prenderol Chemical compound CCC(CC)(CO)CO XRVCFZPJAHWYTB-UHFFFAOYSA-N 0.000 description 1
- 229950006800 prenderol Drugs 0.000 description 1
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 1
- OGHBATFHNDZKSO-UHFFFAOYSA-N propan-2-olate Chemical compound CC(C)[O-] OGHBATFHNDZKSO-UHFFFAOYSA-N 0.000 description 1
- 235000013772 propylene glycol Nutrition 0.000 description 1
- 229910052703 rhodium Inorganic materials 0.000 description 1
- 239000010948 rhodium Substances 0.000 description 1
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 235000015067 sauces Nutrition 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
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 238000003980 solgel method Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 229910052712 strontium Inorganic materials 0.000 description 1
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 description 1
- 238000001308 synthesis method Methods 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- MZLGASXMSKOWSE-UHFFFAOYSA-N tantalum nitride Chemical compound [Ta]#N MZLGASXMSKOWSE-UHFFFAOYSA-N 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
- YBRBMKDOPFTVDT-UHFFFAOYSA-N tert-butylamine Chemical compound CC(C)(C)N YBRBMKDOPFTVDT-UHFFFAOYSA-N 0.000 description 1
- FAGUFWYHJQFNRV-UHFFFAOYSA-N tetraethylenepentamine Chemical compound NCCNCCNCCNCCN FAGUFWYHJQFNRV-UHFFFAOYSA-N 0.000 description 1
- ZUHZGEOKBKGPSW-UHFFFAOYSA-N tetraglyme Chemical compound COCCOCCOCCOCCOC ZUHZGEOKBKGPSW-UHFFFAOYSA-N 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 125000005270 trialkylamine group Chemical group 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- GPPXJZIENCGNKB-UHFFFAOYSA-N vanadium Chemical compound [V]#[V] GPPXJZIENCGNKB-UHFFFAOYSA-N 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
- 229910021521 yttrium barium copper oxide Inorganic materials 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F3/00—Compounds containing elements of Groups 2 or 12 of the Periodic Table
- C07F3/003—Compounds containing elements of Groups 2 or 12 of the Periodic Table without C-Metal linkages
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F5/00—Compounds containing elements of Groups 3 or 13 of the Periodic Table
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F5/00—Compounds containing elements of Groups 3 or 13 of the Periodic Table
- C07F5/003—Compounds containing elements of Groups 3 or 13 of the Periodic Table without C-Metal linkages
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C251/00—Compounds containing nitrogen atoms doubly-bound to a carbon skeleton
- C07C251/02—Compounds containing nitrogen atoms doubly-bound to a carbon skeleton containing imino groups
- C07C251/04—Compounds containing nitrogen atoms doubly-bound to a carbon skeleton containing imino groups having carbon atoms of imino groups bound to hydrogen atoms or to acyclic carbon atoms
- C07C251/06—Compounds containing nitrogen atoms doubly-bound to a carbon skeleton containing imino groups having carbon atoms of imino groups bound to hydrogen atoms or to acyclic carbon atoms to carbon atoms of a saturated carbon skeleton
- C07C251/08—Compounds containing nitrogen atoms doubly-bound to a carbon skeleton containing imino groups having carbon atoms of imino groups bound to hydrogen atoms or to acyclic carbon atoms to carbon atoms of a saturated carbon skeleton being acyclic
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/06—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of metallic material
- C23C16/18—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of metallic material from metallo-organic compounds
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/22—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of inorganic material, other than metallic material
- C23C16/30—Deposition of compounds, mixtures or solid solutions, e.g. borides, carbides, nitrides
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/22—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of inorganic material, other than metallic material
- C23C16/30—Deposition of compounds, mixtures or solid solutions, e.g. borides, carbides, nitrides
- C23C16/40—Oxides
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/22—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of inorganic material, other than metallic material
- C23C16/30—Deposition of compounds, mixtures or solid solutions, e.g. borides, carbides, nitrides
- C23C16/40—Oxides
- C23C16/405—Oxides of refractory metals or yttrium
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/44—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating
- C23C16/455—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating characterised by the method used for introducing gases into reaction chamber or for modifying gas flows in reaction chamber
- C23C16/45523—Pulsed gas flow or change of composition over time
- C23C16/45525—Atomic layer deposition [ALD]
- C23C16/45527—Atomic layer deposition [ALD] characterized by the ALD cycle, e.g. different flows or temperatures during half-reactions, unusual pulsing sequence, use of precursor mixtures or auxiliary reactants or activations
-
- 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
- H01L21/28—Manufacture of electrodes on semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/268
- H01L21/283—Deposition of conductive or insulating materials for electrodes conducting electric current
- H01L21/285—Deposition of conductive or insulating materials for electrodes conducting electric current from a gas or vapour, e.g. condensation
Definitions
- the present invention relates to a metal alkoxide compound having a specific iminoalcohol as a ligand, a raw material for forming a thin film containing the compound, and a method for producing a metal-containing thin film using the raw material for forming a thin film.
- rare earth elements In the periodic table of elements, scandium (Sc), yttrium (Y), and lanthanides from lanthanum (La) to lutetium (Lu) of Group 3 are collectively referred to as rare earth elements, and these rare earth elements are And is an important element in the field of optronics.
- Yttrium is a main constituent element of the YBC type superconductor.
- Lanthanum is a main constituent element of the ferroelectric PLZT.
- many lanthanoid elements are used as additives for functionalization as light emitting materials and the like.
- Methods of producing thin films containing such elements include sputtering method, ion plating method, MOD method such as coating thermal decomposition method and sol-gel method, chemical vapor deposition method, etc.
- composition controllability, step coverage Chemical vapor deposition (hereinafter referred to simply as “CVD”) including ALD (Atomic Layer Deposition) method because it has many advantages such as being excellent in mass production, being suitable for mass production, and being capable of hybrid integration. Method) is the optimal manufacturing process.
- Patent Document 1 discloses a metal alkoxide compound that can be used as a thin film forming raw material.
- Patent Document 2 discloses an alkoxide compound useful as a raw material for forming a thin film in the ALD method, and discloses a general formula including the compound of the present invention.
- Patent Document 2 does not specifically exemplify the metal alkoxide compound of the present invention, and neither discloses nor suggests specifically good effects exerted by the metal alkoxide compound of the present invention.
- an object of the present invention is to provide a metal alkoxide compound having a high vapor pressure and a melting point lower than conventionally known compounds, a material for forming a thin film comprising the same, and a thin film containing metal using the material. It is an object of the present invention to provide a method for producing a thin film to be formed.
- the present invention provides a metal alkoxide compound represented by the following general formula (1), a raw material for forming a thin film containing the same, and a method for producing a thin film using the raw material to form a thin film containing a metal. It offers:
- R 1 and R 2 each independently represent an alkyl group having 1 to 4 carbon atoms
- R 3 represents an alkyl group having 2 or 3 carbon atoms
- M represents a scandium atom or an yttrium atom
- n Represents the valence of the atom represented by M.
- the metal alkoxide compound of the present invention is particularly suitable as a thin film forming material for forming a metal thin film by the CVD method, and can be preferably used as a thin film forming material for the metal thin film formation by the ALD method.
- the metal alkoxide compound of the present invention is represented by the above general formula (1), is suitable as a precursor of a thin film manufacturing method having a vaporization step such as CVD method, and can be applied to the ALD method. Since it is a precursor, it is particularly suitable as a precursor used in the ALD method.
- R 1 and R 2 each independently represent an alkyl group having 1 to 4 carbon atoms
- R 3 represents an alkyl group having 2 or 3 carbon atoms
- M represents scandium Atoms, yttrium atoms, lanthanum atoms, cerium atoms, praseodymium atoms, neomethium atoms, promethium atoms, samarium atoms, europium atoms, gadolinium atoms, terbium atoms, dysprosium atoms, holmium atoms, erbium atoms, thulium atoms, ytterbium atoms or lutetium atoms
- n represents the valence of the atom represented by M.
- examples of the alkyl group having 1 to 4 carbon atoms represented by R 1 and R 2 include methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl and tert-butyl. Etc. Examples of the alkyl group having 2 or 3 carbon atoms represented by R 3 include ethyl, propyl and isopropyl.
- n represents the valence of the atom represented by M.
- M is a europium atom or ytterbium atom
- M is scandium, yttrium, lanthanum, praseodymium, neodymium, promethium, samarium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, or
- n is 3 in the case of a lutetium atom
- n is 4 in the case where M is cerium.
- the metal alkoxide compound represented by the above general formula (1) may have optical activity, but the metal alkoxide compound of the present invention is not particularly distinguished by the R form and the S form, either of which may be used, R It may be a mixture of body and S body in any proportion.
- the racemate is inexpensive to produce.
- R 1 to R 3 in the general formula (1) are specifically preferably R 1 is methyl or ethyl, R 2 is preferably ethyl, and R 3 is ethyl or It is preferred that it is propyl.
- R 1 is methyl or ethyl
- metal alkoxide compounds R 2 is ethyl high vapor pressure, particularly preferred since it is highly less effective melting point
- R 1 is methyl or ethyl
- R 2 is Particularly preferred are metal alkoxide compounds which are ethyl and R 3 is ethyl or propyl.
- R 1 to R 3 may be arbitrarily selected depending on the solubility in the solvent used, the thin film formation reaction, etc. it can.
- the metal alkoxide compound of the present invention is represented by the above general formula (1), but when the terminal donor group in the ligand is coordinated to a metal atom to form a ring structure, that is, The concept is not distinguished from the case represented by the formula (1-A) but is a concept including both.
- R 1 and R 2 each independently represent an alkyl group having 1 to 4 carbon atoms
- R 3 represents an alkyl group having 2 or 3 carbon atoms
- M represents a scandium atom or an yttrium atom
- n Represents the valence of the atom represented by M.
- compound No. 1 As specific examples of the metal alkoxide compound represented by the above general formula (I), compound No. 1 is described. 1 to Compound No. 1 357 can be mentioned.
- “Me” represents a methyl group
- “Et” represents an ethyl group
- “nPr” represents a propyl group
- “iPr” represents an isopropyl group.
- the metal alkoxide compound of the present invention is not particularly limited by the production method thereof, and can be produced by applying a known reaction.
- a method of producing an alkoxide compound a synthesis method of a well-known general alkoxide compound using the corresponding alcohol can be applied.
- a lutetium alkoxide compound for example, a halide of lutetium, nitrate, etc.
- sodium salt sodium hydride, sodium amide, sodium hydroxide, sodium methylate, ammonia, amines, etc.
- the raw material for thin film formation of the present invention refers to the precursor of the thin film made of the metal alkoxide compound of the present invention described above, and the form thereof differs depending on the manufacturing process to which the raw material for thin film formation is applied.
- the raw material for thin film formation is applied.
- the material for forming a thin film of the present invention does not contain a metal compound other than the metal alkoxide compound and
- the raw material for forming a thin film of the present invention contains a compound containing a desired metal and / or a semimetal in addition to the metal alkoxide compound.
- a compound hereinafter also referred to as another precursor
- the thin film forming material of the present invention may further contain an organic solvent and / or a nucleophile, as described later.
- the thin film forming material of the present invention is suitable for the CVD method and the ALD method as described above, the physical properties of the metal alkoxide compound which is a precursor are particularly suitable as a raw material for chemical vapor deposition (hereinafter referred to as "raw material for CVD" Sometimes useful).
- the raw material for thin film formation of this invention is a raw material for CVD
- the form can be suitably selected by methods, such as a transport supply method of the CVD method to be used.
- the CVD raw material is vaporized by heating and / or depressurizing in a container in which the raw material is stored (hereinafter sometimes simply referred to as a “raw material container”) And a carrier gas such as argon, nitrogen, helium, etc., which is used if necessary, a gas for introducing the vapor into a deposition chamber provided with a substrate (hereinafter sometimes referred to as “deposition reaction part”)
- Transport method transport the raw material for CVD in liquid or solution state to the vaporization chamber and evaporate it by heating and / or depressurizing in the vaporization chamber to form a vapor, which is introduced into the deposition chamber.
- the metal alkoxide compound represented by the above general formula (I) can be used as a raw material for CVD.
- the metal alkoxide compound itself represented by the above general formula (I) or a solution in which the compound is dissolved in an organic solvent can be used as a raw material for CVD.
- These CVD materials may further contain other precursors, nucleophiles and the like.
- a method (hereinafter sometimes referred to as the “single source method”) of vaporizing and supplying the raw material for CVD independently for each component and a multi-component raw material having a desired composition in advance
- a method of vaporizing and supplying the mixed raw material mixed (hereinafter sometimes referred to as "cocktail sauce method”).
- the cocktail source method a mixture of the metal alkoxide compound of the present invention and another precursor or a mixed solution of the mixture in an organic solvent can be used as a raw material for CVD.
- the mixture or mixed solution may further contain a nucleophile or the like.
- the CVD raw material containing R body and the CVD raw material containing S body are separately vaporized.
- the CVD material containing a mixture of R- and S-bodies may be vaporized.
- organic solvents are not particularly limited, and known organic solvents can be used.
- the organic solvent include acetic acid esters such as ethyl acetate, butyl acetate and methoxyethyl acetate; tetrahydrofuran, tetrahydropyran, ethylene glycol dimethyl ether, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, dibutyl ether, ethers such as dioxane; methyl Ketones such as butyl ketone, methyl isobutyl ketone, ethyl butyl ketone, dipropyl ketone, diisobutyl ketone, methyl amyl ketone, cyclohexanone and methyl cyclohexanone; hexane, cyclohexane, methylcyclohexane, dimethylcyclohexane, dimethylcyclohexane, ethylcyclohexan
- the amount of the whole precursor in the raw material for CVD which is a solution in which the precursor is dissolved in the organic solvent, is 0.01 to 2.0 mol / l, particularly 0.05 to 1.0 mol. It is preferable to set it as / liter.
- the amount of the whole precursor is the amount of the metal alkoxide compound of the present invention.
- the raw material for forming a thin film contains a compound containing another metal in addition to the metal alkoxide compound and / or a compound containing a metalloid, the total amount of the metal alkoxide compound of the present invention and the other precursor.
- one or more selected from the group consisting of compounds used as organic ligands such as alcohol compounds, glycol compounds, ⁇ -diketone compounds, cyclopentadiene compounds, organic amine compounds and the like Examples thereof include compounds with silicon and metals.
- metal species of the precursor lithium, sodium, potassium, magnesium, calcium, strontium, barium, titanium, zirconium, hafnium, vanadium, niobium, tantalum, chromium, molybdenum, tungsten, manganese, iron, ruthenium, cobalt, rhodium And iridium, nickel, palladium, platinum, copper, silver, gold, zinc, aluminum, gallium, indium, germanium, tin, lead, antimony and bismuth.
- the alcohol compound used as the organic ligand of the other precursor mentioned above is methanol, ethanol, propanol, isopropyl alcohol, butanol, secondary butyl alcohol, isobutyl alcohol, tertiary butyl alcohol, pentyl alcohol, isopentyl alcohol, tertiary alcohol Alkyl alcohols such as pentyl alcohol; 2-methoxyethanol, 2-ethoxyethanol, 2-butoxyethanol, 2- (2-methoxyethoxy) ethanol, 2-methoxy-1-methylethanol, 2-methoxy-1,1 -Dimethylethanol, 2-ethoxy-1,1-dimethylethanol, 2-isopropoxy-1,1-dimethylethanol, 2-butoxy-1,1-dimethylethanol, 2- (2-methoxyethoxy) -1,1 Ether alcohols such as dimethylethanol, 2-propoxy-1,1-diethylethanol, 2-s-butoxy-1,1-diethylethanol, 3-methoxy-1,1-dimethylpropano
- glycol compounds used as organic ligands for the above other precursors include 1,2-ethanediol, 1,2-propanediol, 1,3-propanediol, 2,4-hexanediol, and 2,2- Dimethyl-1,3-propanediol, 2,2-diethyl-1,3-propanediol, 1,3-butanediol, 2,4-butanediol, 2,2-diethyl-1,3-butanediol, 2 -Ethyl-2-butyl-1,3-propanediol, 2,4-pentanediol, 2-methyl-1,3-propanediol, 2-methyl-2,4-pentanediol, 2,4-hexanediol, 2,4-dimethyl-2,4-pentanediol and the like.
- ⁇ -diketone compounds acetylacetone, hexane-2,4-dione, 5-methylhexane-2,4-dione, heptane-2,4-dione, 2-methylheptane-3,5-dione, 5 -Methylheptane-2,4-dione, 6-methylheptane-2,4-dione, 2,2-dimethylheptane-3,5-dione, 2,6-dimethylheptane-3,5-dione, 2,2 , 6-trimethylheptane-3,5-dione, 2,2,6,6-tetramethylheptane-3,5-dione, octane-2,4-dione, 2,2,6-trimethyloctane-3,5 -Dione, 2,6-dimethyloctane-3,5-dione, 2,9-dimethylnonane-4,6-dione, 2-methyl-6-
- cyclopentadiene compounds cyclopentadiene, methylcyclopentadiene, ethylcyclopentadiene, propylcyclopentadiene, isopropylcyclopentadiene, butylcyclopentadiene, secondary butylcyclopentadiene, isobutylcyclopentadiene, tertiary butylcyclopentadiene, dimethylcyclopentadiene And tetramethylcyclopentadiene and the like
- examples of the organic amine compound used as the above organic ligand include methylamine, ethylamine, propylamine, isopropylamine, isopropylamine, butylamine, sec-butylamine, tert-butylamine, isobutylamine, dimethyl Amine, diethylamine, dipropylamine, diisopropylamine, ethylmethylamine, propylmethylamine, Isopropyl
- the other precursors mentioned above are known in the art and their methods of preparation are also known.
- the inorganic salt of the metal described above or the hydrate thereof is reacted with an alkali metal alkoxide of the alcohol compound, for example.
- a precursor can be produced.
- metal inorganic salts or hydrates thereof include metal halides, nitrates and the like
- alkali metal alkoxides include sodium alkoxide, lithium alkoxide, potassium alkoxide and the like.
- the other precursor mentioned above is preferably a compound having similar thermal and / or oxidative degradation behavior to the metal alkoxide compound of the present invention in the case of single source method, and in the case of cocktail source method, heat and / or heat. In addition to the similar behavior of the oxidative decomposition, it is preferable that it does not cause deterioration due to chemical reaction or the like during mixing.
- the raw material for forming a thin film of the present invention may optionally contain a nucleophile in order to impart the stability of the metal alkoxide compound of the present invention and other precursors.
- a nucleophile ethylene glycol ethers such as glyme, diglyme, triglyme, tetraglyme, 18-crown-6, dicyclohexyl-18-crown-6, 24-crown-8, dicyclohexyl-24-crown-8 Crown ethers such as dibenzo-24-crown-8, ethylenediamine, N, N'-tetramethylethylenediamine, diethylenetriamine, triethylenetetramine, tetraethylenepentamine, pentaethylenehexamine, 1,1,4,7,7- Polyamines such as pentamethyldiethylenetriamine, 1,1,4,7,10,10-hexamethyltriethylenetetramine, triethoxytriethyleneamine, cyclic polyamines such as cyclam and
- the raw material for thin film formation of the present invention is made to contain as much as possible impurity metal elements other than the components constituting the film, impurity halogens such as impurity chlorine, and impurity organic components.
- the impurity metal element content is preferably 100 ppb or less, more preferably 10 ppb or less, and 1 ppm or less in total, and more preferably 100 ppb or less in each element.
- the content of alkali metal element, alkaline earth metal element and congeners which affect the electric characteristics of the obtained thin film should be reduced. is necessary.
- the total amount of the organic impurities is preferably 500 ppm or less, more preferably 50 ppm or less, and still more preferably 10 ppm or less.
- water causes particle generation in a chemical vapor deposition raw material and particles generation during thin film formation, reduction of each water content for metal compounds, organic solvents, and nucleophiles It is better to remove water as much as possible before use.
- the water content of each of the metal compound, the organic solvent and the nucleophile is preferably 10 ppm or less, more preferably 1 ppm or less.
- the raw material for thin film formation of the present invention is preferably made to contain particles as little as possible.
- the number of particles larger than 0.3 ⁇ m is preferably 100 or less in 1 ml of liquid phase, and larger than 0.2 ⁇ m
- the number of particles is more preferably 1000 or less in 1 ml of the liquid phase, and still more preferably 100 or less in the number of particles larger than 0.2 ⁇ m.
- a vapor obtained by vaporizing the raw material for thin film deposition of the present invention and a reactive gas used as needed Is introduced into the film formation chamber (processing atmosphere) in which is placed, and then the precursor is decomposed and / or chemically reacted on the substrate to grow and deposit a metal-containing thin film on the substrate surface.
- the film formation chamber processing atmosphere
- No particular limitation is imposed on the method of transporting and supplying the raw material, the deposition method, the production conditions, the production apparatus, and the like, and known general conditions and methods can be used.
- Examples of the reactive gas to be used according to the above requirements include oxygen, ozone, nitrogen dioxide, nitrogen monoxide, water vapor, hydrogen peroxide, formic acid, acetic acid, acetic anhydride and the like as an oxidizing gas.
- Examples of reducing substances include hydrogen
- examples of producing nitrides include organic amine compounds such as monoalkylamines, dialkylamines, trialkylamines, alkylenediamines, hydrazine, ammonia and the like, Can be used alone or in combination of two or more.
- the raw material for thin film formation of the present invention has good reactivity with ozone, it is preferable to use ozone when using one kind of reactive gas, and it is preferable to use two or more kinds of reactive gas. In the case of using a mixed gas, it is preferable to include at least ozone.
- thermal CVD to react a raw material gas or a raw material gas with a reactive gas by heat alone to deposit a thin film
- plasma CVD using heat and plasma photo CVD using heat and light
- thermal And photoplasma CVD using light and plasma thermal And photoplasma CVD using light and plasma
- ALD in which the deposition reaction of CVD is divided into elementary processes and deposition is performed stepwise at the molecular level.
- Examples of the material of the substrate include: silicon; ceramics such as silicon nitride, titanium nitride, tantalum nitride, titanium oxide, titanium nitride, ruthenium oxide, ruthenium oxide, zirconium oxide, hafnium oxide, and lanthanum oxide; glass; metals such as metallic ruthenium Be
- the shape of the substrate may be plate-like, spherical, fibrous or scaly.
- the substrate surface may be flat or may have a three-dimensional structure such as a trench structure.
- the above-mentioned production conditions include a reaction temperature (substrate temperature), a reaction pressure, a deposition rate and the like.
- the reaction temperature is preferably 100 ° C. or higher at which the metal alkoxide compound of the present invention sufficiently reacts, more preferably 150 ° C. to 400 ° C., particularly preferably 200 ° C. to 350 ° C.
- the reaction pressure is preferably 10 Pa to atmospheric pressure in the case of thermal CVD or photo CVD, and preferably 10 Pa to 2000 Pa in the case of using plasma.
- the deposition rate can be controlled by the supply conditions of the raw material (evaporation temperature, evaporation pressure), the reaction temperature, and the reaction pressure.
- a deposition rate of 0.01 nm / min to 100 nm / min is preferable, and a deposition rate of 1 nm / min to 50 nm / min is preferable because a large deposition rate may deteriorate the properties of the obtained thin film, and a small deposition rate may cause problems in productivity. Is more preferred.
- the number of cycles is controlled to obtain a desired film thickness.
- the above-mentioned production conditions further include the temperature and pressure at the time of vaporizing the thin film forming material to form a vapor.
- the step of vaporizing the thin film forming material into vapor may be performed in the material container or in the vaporizing chamber.
- the thin film-forming material of the present invention is preferably evaporated at 0 ° C. to 150 ° C.
- the pressure in the source container and the pressure in the vaporization chamber are each preferably 1 Pa to 10000 Pa.
- the thin film production method of the present invention adopts the ALD method, and the raw material for thin film formation is vaporized into vapor by the above-mentioned transport supply method, and the raw material introduction step of introducing the vapor into the film forming chamber, A precursor thin film forming step of forming a precursor thin film on the surface of the substrate by the compound in the vapor; an exhausting step of exhausting an unreacted compound gas; and a chemical reaction of the precursor thin film with a reactive gas, It may have a metal-containing thin film forming step of forming a thin film containing metal on the surface of the substrate.
- the raw material introduction step described above is performed.
- steam are the same as that of what was demonstrated by the manufacturing method of the thin film by CVD method.
- the precursor thin film is formed on the surface of the substrate by bringing the vapor introduced into the film forming chamber into contact with the surface of the substrate (precursor thin film forming step).
- the substrate may be heated or the film formation chamber may be heated to apply heat.
- the precursor thin film formed in this step is a thin film formed from the metal alkoxide compound of the present invention, or a thin film formed by decomposition and / or reaction of a part of the metal alkoxide compound of the present invention, It has a different composition from the target metal oxide thin film.
- Room temperature to 500 ° C. is preferable, and 150 ° C. to 350 ° C. is more preferable for the substrate temperature when this step is performed.
- the pressure of the system (in the deposition chamber) when this step is performed is preferably 1 Pa to 10000 Pa, and more preferably 10 Pa to 1000 Pa.
- unreacted compound gas and by-produced gas are exhausted from the film formation chamber (exhaust process).
- Unreacted compound gas and by-produced gas are ideally exhausted completely from the film forming chamber, but they do not necessarily have to be exhausted completely.
- an evacuation method a method of purging the inside of the system with an inert gas such as nitrogen, helium, argon, a method of evacuation by depressurizing the inside of the system, a method combining these, etc. may be mentioned.
- the degree of pressure reduction is preferably 0.01 Pa to 300 Pa, and more preferably 0.01 Pa to 100 Pa.
- an oxidizing gas is introduced into the film forming chamber as a reactive gas, and the action of the oxidizing gas or the action of the oxidizing gas and heat causes metal oxidation from the precursor thin film obtained in the previous precursor thin film forming step.
- a metal thin film (a metal oxide-containing thin film forming step). Room temperature to 500 ° C. is preferable, and 150 to 350 ° C. is more preferable as a temperature when heat is applied in this step.
- the pressure of the system (in the deposition chamber) when this step is performed is preferably 1 Pa to 10000 Pa, and more preferably 10 Pa to 1000 Pa.
- the metal alkoxide compound of the present invention is excellent in the reactivity with the oxidizing gas, so that a high quality metal oxide thin film with a small residual carbon content can be obtained.
- thin film deposition by a series of operations including the above-mentioned raw material introducing step, precursor thin film forming step, exhausting step and metal oxide containing thin film forming step
- One cycle may be repeated several times until a thin film having the required film thickness is obtained.
- unreacted compound gas and reactive gas oxidative gas in the case of forming a metal oxide thin film
- by-product gas It is preferable to carry out the next cycle after evacuating the
- the metal oxide thin film by the ALD method energy such as plasma, light, voltage or the like may be applied, or a catalyst may be used.
- the time of applying the energy and the time of using the catalyst are not particularly limited.
- the oxidizing gas may be introduced in the step of forming the metal oxide-containing thin film, or between the above steps.
- annealing may be performed in an inert atmosphere, in an oxidizing atmosphere, or in a reducing atmosphere to obtain better electrical characteristics. If embedding is required, a reflow process may be provided.
- the temperature in this case is 200 ° C. to 1000 ° C., preferably 250 ° C. to 500 ° C.
- the apparatus for manufacturing a thin film using the raw material for thin film formation of the present invention can use a known apparatus for chemical vapor deposition.
- the apparatus include an apparatus capable of bubbling a precursor as shown in FIG. 1 and an apparatus having a vaporization chamber as shown in FIG. Further, as shown in FIG. 3 and FIG. 4, an apparatus capable of performing plasma processing on a reactive gas can be mentioned. Not limited to the single-wafer apparatus as shown in FIGS. 1 to 4, an apparatus capable of simultaneously processing multiple wafers using a batch furnace can also be used.
- the thin film produced using the raw material for thin film formation of the present invention can be formed of a desired kind of metal, oxide ceramic, nitride ceramic, glass or the like by appropriately selecting other precursors, reactive gases and production conditions. It can be a thin film.
- the thin film is known to exhibit electrical properties, optical properties and the like, and is applied to various applications.
- a yttrium-containing thin film is used as a YBCO-based superconductor.
- a lanthanum-containing thin film is used as a ferroelectric system PLZT.
- many lanthanoid atoms are used as a dopant for imparting a function to improve the electrical properties of a specific thin film and a function to improve light emission.
- Example 1 Compound No. 1 26
- 22 g of yttrium-tris-trimethylsilylamide and 86 g of dehydrated toluene were added and mixed well.
- 23 g of 2-ethylimino-3-ethylpentan-3-ol was added dropwise.
- the solvent was removed under reduced pressure at an oil bath of 100 ° C., and then the drying of the solid was performed at an oil bath of 113 ° C. under reduced pressure.
- the formed yttrium complex (reddish brown viscous liquid) was placed in a flask and subjected to distillation purification. Distillation purification was performed at a heating temperature of 189 ° C. and a pressure of 20 Pa to obtain 9.1 g of a pale yellow solid. The melting point of the obtained solid was 51 ° C.
- Example 2 Compound No. 44
- 3.4 g of lanthanum-tris-trimethylsilylamide and 21 g of dehydrated toluene were added and mixed well.
- To this suspension was added dropwise 2.4 g of 2-ethylimino-3-methylpentan-3-ol at room temperature (20 ° C.).
- a pale yellow clear solution was obtained.
- the solvent was removed under reduced pressure at an oil bath of 110 ° C., and drying of the solid was carried out at an oil bath of 120 ° C. under reduced pressure.
- the formed lanthanum complex (light yellow liquid) was charged into a flask and connected to a small purification apparatus. Distillation purification was performed at a heating temperature of 200 ° C. and 30 Pa to obtain 1.0 g of a pale yellow liquid.
- the melting point of the obtained solid was 63 ° C.
- Example 3 Compound No. 3 47
- 14 g of lanthanum-tris-trimethylsilylamide and 86 g of dehydrated toluene were added and mixed well.
- 12 g of 2-ethylimino-3-ethylpentan-3-ol was added dropwise.
- the mixture was reacted with stirring at room temperature for 20 hours.
- the solvent was removed under reduced pressure at 105 ° C. in an oil bath, and then drying was performed at 125 ° C. in an oil bath under reduced pressure.
- the formed lanthanum complex reddish brown viscous liquid
- Distillation purification was performed at a heating temperature of 175 ° C. and a pressure of 30 Pa to obtain 5.2 g of a pale yellow solid.
- the melting point of the obtained solid was 69 ° C.
- Example 4 Compound No. 4 341
- 1.0 g of lutetium-tris-trimethylsilylamide and 20 g of dehydrated toluene were added and mixed well.
- To this suspension was added dropwise 0.72 g of 2-ethylimino-3-ethylpentan-3-ol at room temperature (20 ° C.).
- the white suspension turned into a pale yellow clear liquid.
- the mixture was stirred overnight at room temperature. Thereafter, the solvent was removed under reduced pressure at 105 ° C. in an oil bath, and the generated lutetium complex (light yellow viscous liquid) was sufficiently dried.
- the lutetium complex was placed in a flask and connected to a sublimation purification apparatus. Sublimation purification was performed at an apparatus heating temperature of 180 ° C. and 30 Pa to obtain 0.5 g of a white solid. The melting point of the obtained solid was 185 ° C.
- the compound No. Compound No. 26 is compared with Comparative Compound 1, which is a tertiary amino alkoxide yttrium compound having a structure similar to that of No. 26. It was found that No. 26 had a low melting point, and the temperature at TG 50% decrease was also low. Compound No. The compound No. 26 had a melting point lower than that of the comparative compound 1 and a high vapor pressure, and thus was found to be a compound suitable as a raw material for forming a thin film.
- Comparative Compound 3 which is a tertiary aminoalkoxydotethium compound having a similar structure to that of Compound No. 341. It was found that the melting point of 341 is low and the temperature at TG 50% reduction is also low. In addition, as a result of temperature at the time of 50% decrease of TG measured in Comparative Example 3, only 40 to 45% by mass was reduced even if Comparative Compound 3 was heated to 600 ° C. Therefore, Comparative Compound 3 had a low vapor pressure. It turned out that it is unsuitable as a raw material for thin film formation. Compound No. The compound No. 26 had a melting point lower than that of the comparative compound 1 and a high vapor pressure, and thus was found to be a compound suitable as a raw material for forming a thin film.
- Example 5 Preparation of Yttrium Oxide Thin Film Compound No. 5
- An yttrium oxide thin film was produced on a silicon wafer by the ALD method under the following conditions using the apparatus shown in FIG. 1 as a raw material for atomic layer deposition method 26.
- the film thickness was measured by the X-ray reflectance method, and the average value was calculated.
- the average film thickness was 70 nm, and the average film thickness obtained per cycle was 0.07 nm.
- the surface of the thin film was smooth.
- Comparative Example 4 Preparation of Yttrium Oxide Thin Film A comparative compound 1 was used as a raw material for atomic layer deposition, and a yttrium oxide thin film was manufactured on a silicon substrate under the same conditions as in Example 5. About the obtained thin film, when the thin film structure and thin film composition were confirmed by film thickness measurement by X-ray reflectivity method, X-ray diffraction method and X-ray photoelectron spectroscopy, the film thickness was 4 nm and the film composition was oxidized It was yttrium, and the residual carbon content in the thin film was 10 atom% or more. The film thickness obtained per cycle was 0.004 nm.
- Example 5 From the results of Example 5, according to the compound No. It has been found that when Y.26 is used as a thin film forming material for the ALD method, an yttrium oxide thin film of excellent quality can be formed. On the other hand, it was found that the thin film obtained when using the comparative compound 1 as a raw material for forming a thin film for the ALD method has a large amount of residual carbon and is a thin film of poor quality.
- Example 6 Production of Lanthanum Oxide Thin Film Compound No. 6 44 was used as a raw material for atomic layer deposition, and a lanthanum oxide thin film was manufactured on a silicon wafer by ALD using the apparatus shown in FIG. 1 under the following conditions.
- the film thickness was measured by the X-ray reflectance method, and the average value was calculated. The film thickness was 60 nm, and the film thickness obtained per cycle was 0.06 nm on average. Moreover, as a result of cross-sectional observation using FE-SEM, the surface of the thin film was smooth.
- Comparative Example 5 Preparation of Lanthanum Oxide Thin Film A comparative compound 2 was used as a raw material for atomic layer deposition, and a lanthanum oxide thin film was produced on a silicon substrate under the same conditions as in Example 6. About the obtained thin film, when the thin film structure and thin film composition were confirmed by film thickness measurement by X-ray reflectivity method, X-ray diffraction method and X-ray photoelectron spectroscopy, the film thickness was 3 nm, and the film composition was oxidized It was lanthanum, and the residual carbon content in the thin film was 10 atom% or more. The film thickness obtained per cycle was 0.003 nm.
- Example 6 and Example 7 From the results of Example 6 and Example 7, compound No. 1 was obtained. 44 and compound no. It has been found that, when 47 is used as a thin film forming material for the ALD method, a lanthanum oxide thin film of excellent quality can be formed. On the other hand, it was found that the thin film obtained when the comparative compound 2 was used as a thin film forming material for the ALD method had a large amount of residual carbon and was a thin film of poor quality.
- Example 8 Production of lutetium oxide thin film Compound No. 8
- a lutetium oxide thin film was produced on a silicon wafer by the ALD method under the following conditions using the apparatus shown in FIG. 1 as a raw material for atomic layer deposition method 341.
- the film thickness was measured by the X-ray reflectance method, and the average value was calculated.
- the film thickness was 65 nm, and the film thickness obtained per cycle was an average of 0.065 nm.
- the surface of the thin film was smooth.
- Comparative Example 6 Preparation of Lutetium Oxide Thin Film A comparative compound 3 was used as a raw material for atomic layer deposition, and a lutetium oxide thin film was produced on a silicon substrate under the same conditions as in Example 6. About the obtained thin film, when the thin film structure and thin film composition were confirmed by film thickness measurement by X-ray reflectivity method, X-ray diffraction method and X-ray photoelectron spectroscopy, the film thickness was 4 nm and the film composition was oxidized It was lutetium and the residual carbon content in the thin film was 3 atom% or more. The film thickness obtained per cycle was 0.004 nm.
- Example 8 From the results of Example 8, according to the compound No. When 341 was used as a thin film forming material for the ALD method, it was found that a lutetium oxide thin film of excellent quality can be formed. On the other hand, it was found that the thin film obtained when using the comparative compound 3 as a thin film forming material for the ALD method has a large amount of residual carbon and is a thin film of poor quality.
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Abstract
Description
したがって、本発明の目的は、蒸気圧が高く、従来知られた化合物よりも融点が低い金属アルコキシド化合物、これを含有してなる薄膜形成用原料、及び該原料を用いて金属を含有する薄膜を形成するための薄膜の製造方法を提供することにある。
上記一般式(1)で表される金属アルコキシド化合物は光学活性を有する場合があるが、本発明の金属アルコキシド化合物は特にR体、S体により区別されるものではなく、そのどちらでもよく、R体とS体との任意の割合の混合物でもよい。なお、ラセミ体は、製造コストが安価である。
、ジエチレントリアミン、トリエチレンテトラミン、テトラエチレンペンタミン、ペンタエチレンヘキサミン、1,1,4,7,7-ペンタメチルジエチレントリアミン、1,1,4,7,10,10-ヘキサメチルトリエチレンテトラミン、トリエトキシトリエチレンアミン等のポリアミン類、サイクラム、サイクレン等の環状ポリアミン類、ピリジン、ピロリジン、ピペリジン、モルホリン、N-メチルピロリジン、N-メチルピペリジン、N-メチルモルホリン、テトラヒドロフラン、テトラヒドロピラン、1,4-ジオキサン、オキサゾール、チアゾール、オキサチオラン等の複素環化合物類、アセト酢酸メチル、アセト酢酸エチル、アセト酢酸-2-メトキシエチル等のβ-ケトエステル類又はアセチルアセトン、2,4-ヘキサンジオン、2,4-ヘプタンジオン、3,5-ヘプタンジオン、ジピバロイルメタン等のβ-ジケトン類が挙げられ、これら求核性試薬の使用量は、プレカーサ全体の量1モルに対して0.1モル~10モルの範囲が好ましく、より好ましくは1~4モルである。
また、堆積速度は、原料の供給条件(気化温度、気化圧力)、反応温度、反応圧力によりコントロールすることができる。堆積速度は、大きいと得られる薄膜の特性が悪化する場合があり、小さいと生産性に問題を生じる場合があるので、0.01nm/分~100nm/分が好ましく、1nm/分~50nm/分がより好ましい。また、ALD法の場合は、所望の膜厚が得られるようにサイクルの回数でコントロールされる。
[実施例1]化合物No.26
反応フラスコに、22gのイットリウム-トリス-トリメチルシリルアミドと、86gの脱水トルエンを加え、十分に混合した。この懸濁液に室温(20℃)にて、23gの2-エチルイミノ-3-エチルペンタン-3-オールを滴下した。滴下終了後は白色の懸濁液となったが、60℃で加熱後すぐに淡黄色透明液体に変化した。その後、減圧下オイルバス100℃にて脱溶媒を行い、その後、固体の乾燥は減圧下オイルバス113℃で実施した。生成したイットリウム錯体(赤褐色粘性液体)をフラスコに入れ蒸留精製を行った。加熱温度189℃、圧力20Paにて蒸留精製を行い、淡黄色固体9.1gを得た。得られた固体の融点は51℃であった。
(1)常圧TG-DTA
質量50%減少温度:278℃(Ar流量:100ml/分、昇温10℃/分)
(2)減圧TG-DTA
質量50%減少温度:194℃(Ar流量:50ml/分、昇温10℃/分)
(3)1H-NMR(重ベンゼン)
1.00ppm(6H、triplet)、1.30(3H、triplet)、1.44ppm(3H、singlet)、1.55-1.70ppm(4H、multiplet)、3.43ppm(2H、qualtet)
(4)元素分析(理論値)
C:58.3%(58.2%)、H:9.9%(9.8%)、Y:15.7%(15.9%)、N:7.3%(7.5%)、O:8.8%(8.6%)
反応フラスコに、3.4gのランタン-トリス-トリメチルシリルアミドと、21gの脱水トルエンを加え、十分に混合させた。この懸濁液に室温(20℃)にて、2.4gの2-エチルイミノ-3-メチルペンタン-3-オールを滴下した。室温にて24時間撹拌後、淡黄色透明溶液を得た。その後、減圧下オイルバス110℃にて脱溶媒を行い、固体の乾燥は減圧下オイルバス120℃で実施した。生成したランタン錯体(淡黄色液体)をフラスコに入れ、小型精製装置に接続した。加熱温度200℃、30Paにて蒸留精製を行い、淡黄色液体1.0gを得た。得られた固体の融点は63℃であった。
(1)常圧TG-DTA
質量50%減少温度:276℃(Ar流量:100ml/分、昇温10℃/分)
(2)減圧TG-DTA
室料50%減少温度:250℃(Ar流量:50ml/分、昇温10℃/分)
(3)1H-NMR(重ベンゼン)
1.06ppm(3H、triplet)、1.19ppm(3H、triplet)、1.56ppm(3H、broad)、1.64ppm(3H、singlet)、1.71ppm(1H、multiplet)、1.87ppm(1H、multiplet)
(4)元素分析(理論値)
C:50.8%(51.0%)、H:8.7%(8.6%)、La:24.6%(24.6%)、N:7.1%(7.4%)、O:8.8%(8.5%)
反応フラスコに、14gのランタン-トリス-トリメチルシリルアミドと、86gの脱水トルエンを加え、十分に混合させた。この懸濁液に室温(20℃)にて、12gの2-エチルイミノ-3-エチルペンタン-3-オールを滴下した。加熱後室温にて20時間撹拌反応させた。その後、減圧下オイルバス105℃にて脱溶媒を行い、その後乾燥は減圧下オイルバス125℃で実施した。生成したランタン錯体(赤褐色粘性液体)をフラスコに入れ蒸留精製を行った。加熱温度175℃、圧力30Paにて蒸留精製を行い、淡黄色固体5.2gを得た。得られた固体の融点は69℃であった。
(1)常圧TG-DTA
質量50%減少温度:258℃(Ar流量:100ml/分、昇温10℃/分)
(2)減圧TG-DTA
質量50%減少温度:200℃(Ar流量:50ml/分、昇温10℃/分)
(3)1H-NMR(重ベンゼン)
1.02ppm(6H、triplet)、1.39(3H、triplet)、1.45ppm(3H、singlet)、1.57-1.64ppm(4H、multiplet)、3.3ppm(2H、qualtet)
(4)元素分析(理論値)
C:53.6%(53.4%)、H:9.1%(9.0%)、La:22.8%(22.9%)、N:6.9%(6.9%)、O:7.7%(7.9%)
反応フラスコに、1.0gのルテチウム-トリス-トリメチルシリルアミドと、20gの脱水トルエンを加え、十分に混合させた。この懸濁液に室温(20℃)にて、0.72gの2-エチルイミノ-3-エチルペンタン-3-オールを滴下した。白色の懸濁液は淡黄色透明液体に変化した。滴下終了後、室温にて終夜撹拌させた。その後、減圧下オイルバス105℃にて脱溶媒を行い、生成したルテチウム錯体(淡黄色粘性液体)を十分に乾燥させた。このルテチウム錯体をフラスコに入れ昇華精製装置に接続した。装置加熱温度180℃、30Paにて昇華精製を行い、白色固体0.5gを得た。得られた固体の融点は185℃であった。
(1)常圧TG-DTA
質量50%減少温度:277℃(Ar流量:100ml/分、昇温10℃/分)
(2)減圧TG-DTA
質量50%減少温度:192℃(Ar流量:50ml/分、昇温10℃/分)
(3)1H-NMR(重ベンゼン)
1.00ppm(6H、triplet)、1.28ppm(3H、triplet)、1.45ppm(3H、singlet)、1.55~1.75ppm(4H、multiplet)、3.48ppm(2H、qualtet)
(4)元素分析(理論値)
C:50.6%(50.4%)、H:8.3%(8.46%)、Lu:27.0%(27.2%)、N:6.3%(6.53%)、O:7.5%(7.46%)
実施例1~4で得られた本発明の金属アルコキシド化合物No.26、44、47、314並びに下記の比較化合物1、2及び3について、微小融点測定装置を用いて融点を測定した。また、TG-DTA測定装置を用いて、減圧雰囲気下(10torr)での加熱によってサンプル質量が50質量%減少した時点の温度(以下、「TG50%減少時温度」と略す場合がある)を確認した。融点が低いものは輸送性が良好であることから好ましく、TG50%減少時温度が低いものは蒸気圧が高いことから好ましいと判断することができる。結果を表1、表2および表3に示す。
また、比較例3で測定したTG50%減少時温度の結果、比較化合物3を600℃まで加熱しても40~45質量%しか質量が減少しなかったことから、比較化合物3は蒸気圧が低く薄膜形成用原料としては不適であることがわかった。化合物No.26は、比較化合物1よりも融点が低く、さらに蒸気圧が高いことから、薄膜形成用原料として好適な化合物であることがわかった。
化合物No.26を原子層堆積法用原料とし、図1に示す装置を用いて以下の条件のALD法により、シリコンウエハ上に酸化イットリウム薄膜を製造した。
得られた薄膜をX線光電子分光法による薄膜組成の確認したところ、得られた薄膜は酸化イットリウム(Y:O=2:3)であり、炭素含有量は検出下限である0.1atom%よりも少なかった。また、X線反射率法による膜厚測定を行い、その平均値を算出したところ、膜厚は平均70nmであり、1サイクル当たりに得られる膜厚は平均0.07nmであった。また、FE-SEMを用いた断面観察の結果、薄膜の表面は平滑であった。
基板:シリコンウェハ
反応温度(シリコンウエハ温度);325℃
反応性ガス:H2O
下記(1)~(4)からなる一連の工程を1サイクルとして、1000サイクル繰り返した;
(1)原料容器温度:160℃、原料容器内圧力:100Paの条件で気化させた原子層堆積法用原料を成膜チャンバーに導入し、系圧力:100Paで30秒間堆積させる;
(2)15秒間のアルゴンパージにより、堆積しなかった原料を除去する;
(3)反応性ガスを成膜チャンバーに導入し、系圧力:100Paで0.2秒間反応させる;
(4)15秒間のアルゴンパージにより、未反応の第一の反応性ガス及び副生ガスを除去する。
比較化合物1を原子層堆積法用原料とし、実施例5と同じ条件下でシリコン基板上に酸化イットリウム薄膜を製造した。得られた薄膜について、X線反射率法による膜厚測定、X線回折法及びX線光電子分光法による薄膜構造及び薄膜組成の確認を行ったところ、膜厚は4nmであり、膜組成は酸化イットリウムであり、薄膜中の残留炭素含有量は10atom%以上であった。1サイクル当たりに得られる膜厚は、0.004nmであった。
化合物No.44を原子層堆積法用原料とし、図1に示す装置を用いて以下の条件のALD法により、シリコンウエハ上に酸化ランタン薄膜を製造した。
得られた薄膜をX線光電子分光法による薄膜組成の確認したところ、得られた薄膜は酸化ランタン(La:O=2:3)であり、炭素含有量は検出下限である0.1atom%よりも少なかった。また、X線反射率法による膜厚測定を行い、その平均値を算出したところ、膜厚は60nmであり、1サイクル当たりに得られる膜厚は平均0.06nmであった。また、FE-SEMを用いた断面観察の結果、薄膜の表面は平滑であった。
基板:シリコンウェハ
反応温度(シリコンウエハ温度);325℃
反応性ガス:H2O
下記(1)~(4)からなる一連の工程を1サイクルとして、1000サイクル繰り返した:
(1)原料容器温度:160℃、原料容器内圧力:100Paの条件で気化させた原子層堆積法用原料を成膜チャンバーに導入し、系圧力:100Paで30秒間堆積させる;
(2)15秒間のアルゴンパージにより、堆積しなかった原料を除去する;
(3)反応性ガスを成膜チャンバーに導入し、系圧力:100Paで0.2秒間反応させる;
(4)15秒間のアルゴンパージにより、未反応の第一の反応性ガス及び副生ガスを除去する。
化合物No.47を原子層堆積法用原料とし、実施例6と同じ条件下でシリコン基板上に酸化ランタン薄膜を製造した。得られた薄膜をX線光電子分光法による薄膜組成の確認したところ、得られた薄膜は酸化ランタン(La:O=2:3)であり、炭素含有量は検出下限である0.1atom%よりも少なかった。また、X線反射率法による膜厚測定を行い、その平均値を算出したところ、膜厚は70nmであり、1サイクル当たりに得られる膜厚は平均0.07nmであった。また、FE-SEMを用いた断面観察の結果、薄膜の表面は平滑であった。
比較化合物2を原子層堆積法用原料とし、実施例6と同じ条件下でシリコン基板上に酸化ランタン薄膜を製造した。得られた薄膜について、X線反射率法による膜厚測定、X線回折法及びX線光電子分光法による薄膜構造及び薄膜組成の確認を行ったところ、膜厚は3nmであり、膜組成は酸化ランタンであり、薄膜中の残留炭素含有量は10atom%以上であった。1サイクル当たりに得られる膜厚は、0.003nmであった。
化合物No.341を原子層堆積法用原料とし、図1に示す装置を用いて以下の条件のALD法により、シリコンウエハ上に酸化ルテチウム薄膜を製造した。
得られた薄膜をX線光電子分光法による薄膜組成の確認したところ、得られた薄膜は酸化ルテチウム(Lu:O=2:3)であり、炭素含有量は検出下限である0.1atom%よりも少なかった。また、X線反射率法による膜厚測定を行い、その平均値を算出したところ、膜厚は65nmであり、1サイクル当たりに得られる膜厚は平均0.065nmであった。また、FE-SEMを用いた断面観察の結果、薄膜の表面は平滑であった。
基板:シリコンウェハ
反応温度(シリコンウエハ温度);325℃
反応性ガス:H2O
下記(1)~(4)からなる一連の工程を1サイクルとして、1000サイクル繰り返した:
(1)原料容器温度:160℃、原料容器内圧力:100Paの条件で気化させた原子層堆積法用原料を成膜チャンバーに導入し、系圧力:100Paで30秒間堆積させる;
(2)15秒間のアルゴンパージにより、堆積しなかった原料を除去する;
(3)反応性ガスを成膜チャンバーに導入し、系圧力:100Paで0.2秒間反応させる;
(4)15秒間のアルゴンパージにより、未反応の第一の反応性ガス及び副生ガスを除去する。
比較化合物3を原子層堆積法用原料とし、実施例6と同じ条件下でシリコン基板上に酸化ルテチウム薄膜を製造した。得られた薄膜について、X線反射率法による膜厚測定、X線回折法及びX線光電子分光法による薄膜構造及び薄膜組成の確認を行ったところ、膜厚は4nmであり、膜組成は酸化ルテチウムであり、薄膜中の残留炭素含有量は3atom%以上であった。1サイクル当たりに得られる膜厚は、0.004nmであった。
Claims (3)
- 請求項1に記載の金属アルコキシド化合物を含有してなる薄膜形成用原料。
- 基体の表面にスカンジウム原子、イットリウム原子、ランタン原子、セリウム原子、プラセオジム原子、ネオジム原子、プロメチウム原子、サマリウム原子、ユウロピウム原子、ガドリニウム原子、テルビウム原子、ジスプロシウム原子、ホルミウム原子、エルビウム原子、ツリウム原子、イッテルビウム原子およびルテチウム原子から選ばれる少なくとも1種の原子を含有する薄膜の製造方法であって、請求項2に記載の金属アルコキシド化合物を含有してなる薄膜形成用原料を気化させることにより得られる金属アルコキシド化合物を含有する蒸気を処理雰囲気に導入し、金属アルコキシド化合物を分解及び/又は化学反応させて前記基体の表面に堆積させる工程を含む薄膜の製造方法。
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WO2013188377A1 (en) * | 2012-06-11 | 2013-12-19 | Wayne State University | Precursors for atomic layer deposition |
WO2014077089A1 (ja) | 2012-11-13 | 2014-05-22 | 株式会社Adeka | 金属アルコキシド化合物、薄膜形成用原料、薄膜の製造方法及びアルコール化合物 |
US20140227444A1 (en) * | 2013-02-13 | 2014-08-14 | Wayne State University | Synthesis And Characterization Of First Row Transition Metal Complexes Containing a-Imino Alkoxides As Precursors For Deposition Of Metal Films |
WO2015163090A1 (ja) * | 2014-04-21 | 2015-10-29 | 株式会社Adeka | アルコキシド化合物、薄膜形成用原料、薄膜の製造方法及びアルコール化合物 |
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2018
- 2018-05-28 JP JP2019525273A patent/JPWO2018235530A1/ja active Pending
- 2018-05-28 CN CN201880037348.4A patent/CN110709381A/zh active Pending
- 2018-05-28 EP EP18820895.3A patent/EP3643700A4/en not_active Withdrawn
- 2018-05-28 KR KR1020197034538A patent/KR20200019608A/ko not_active Application Discontinuation
- 2018-05-28 WO PCT/JP2018/020352 patent/WO2018235530A1/ja unknown
- 2018-05-28 US US16/609,622 patent/US20200148706A1/en not_active Abandoned
- 2018-06-06 TW TW107119457A patent/TW201908286A/zh unknown
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2019
- 2019-12-16 IL IL271462A patent/IL271462A/en unknown
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WO2013188377A1 (en) * | 2012-06-11 | 2013-12-19 | Wayne State University | Precursors for atomic layer deposition |
WO2014077089A1 (ja) | 2012-11-13 | 2014-05-22 | 株式会社Adeka | 金属アルコキシド化合物、薄膜形成用原料、薄膜の製造方法及びアルコール化合物 |
US20140227444A1 (en) * | 2013-02-13 | 2014-08-14 | Wayne State University | Synthesis And Characterization Of First Row Transition Metal Complexes Containing a-Imino Alkoxides As Precursors For Deposition Of Metal Films |
WO2015163090A1 (ja) * | 2014-04-21 | 2015-10-29 | 株式会社Adeka | アルコキシド化合物、薄膜形成用原料、薄膜の製造方法及びアルコール化合物 |
JP2015205837A (ja) | 2014-04-21 | 2015-11-19 | 株式会社Adeka | アルコキシド化合物、薄膜形成用原料及び薄膜の製造方法及びアルコール化合物 |
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See also references of EP3643700A4 |
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IL271462A (en) | 2020-01-30 |
JPWO2018235530A1 (ja) | 2020-04-23 |
CN110709381A (zh) | 2020-01-17 |
US20200148706A1 (en) | 2020-05-14 |
EP3643700A1 (en) | 2020-04-29 |
KR20200019608A (ko) | 2020-02-24 |
EP3643700A4 (en) | 2021-03-10 |
TW201908286A (zh) | 2019-03-01 |
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