JP2010518645A - 基板上に金属含有層を形成するための蒸着法 - Google Patents
基板上に金属含有層を形成するための蒸着法 Download PDFInfo
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- JP2010518645A JP2010518645A JP2009549656A JP2009549656A JP2010518645A JP 2010518645 A JP2010518645 A JP 2010518645A JP 2009549656 A JP2009549656 A JP 2009549656A JP 2009549656 A JP2009549656 A JP 2009549656A JP 2010518645 A JP2010518645 A JP 2010518645A
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- Prior art keywords
- titanium oxide
- deposition
- vapor
- precursor compound
- titanium
- Prior art date
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- Granted
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- 238000000034 method Methods 0.000 title claims abstract description 161
- 239000000758 substrate Substances 0.000 title claims abstract description 142
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 84
- 239000002184 metal Substances 0.000 title claims abstract description 84
- 238000007740 vapor deposition Methods 0.000 title description 4
- 238000000231 atomic layer deposition Methods 0.000 claims abstract description 70
- VEALVRVVWBQVSL-UHFFFAOYSA-N strontium titanate Chemical compound [Sr+2].[O-][Ti]([O-])=O VEALVRVVWBQVSL-UHFFFAOYSA-N 0.000 claims abstract description 28
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 21
- BDAGIHXWWSANSR-NJFSPNSNSA-N hydroxyformaldehyde Chemical compound O[14CH]=O BDAGIHXWWSANSR-NJFSPNSNSA-N 0.000 claims abstract description 8
- 229910000018 strontium carbonate Inorganic materials 0.000 claims abstract description 8
- 238000000151 deposition Methods 0.000 claims description 233
- 230000008021 deposition Effects 0.000 claims description 229
- 239000002243 precursor Substances 0.000 claims description 161
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 127
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 127
- 150000001875 compounds Chemical class 0.000 claims description 120
- 239000010936 titanium Substances 0.000 claims description 83
- 229910052719 titanium Inorganic materials 0.000 claims description 70
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 63
- 229910052712 strontium Inorganic materials 0.000 claims description 63
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 claims description 59
- 230000008569 process Effects 0.000 claims description 57
- 239000000203 mixture Substances 0.000 claims description 47
- 239000007789 gas Substances 0.000 claims description 44
- IATRAKWUXMZMIY-UHFFFAOYSA-N strontium oxide Chemical compound [O-2].[Sr+2] IATRAKWUXMZMIY-UHFFFAOYSA-N 0.000 claims description 44
- 239000004065 semiconductor Substances 0.000 claims description 42
- 125000002524 organometallic group Chemical group 0.000 claims description 33
- 238000000137 annealing Methods 0.000 claims description 23
- 238000010926 purge Methods 0.000 claims description 22
- -1 strontium carboxylate Chemical class 0.000 claims description 22
- 239000012159 carrier gas Substances 0.000 claims description 17
- 239000003446 ligand Substances 0.000 claims description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
- 229910052757 nitrogen Inorganic materials 0.000 claims description 11
- 229910052760 oxygen Inorganic materials 0.000 claims description 11
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 10
- 238000005137 deposition process Methods 0.000 claims description 9
- 239000011261 inert gas Substances 0.000 claims description 9
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 8
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims description 8
- 230000001590 oxidative effect Effects 0.000 claims description 8
- 239000001301 oxygen Substances 0.000 claims description 8
- 239000012495 reaction gas Substances 0.000 claims description 8
- 125000000217 alkyl group Chemical group 0.000 claims description 7
- 229910052786 argon Inorganic materials 0.000 claims description 6
- 229910052734 helium Inorganic materials 0.000 claims description 6
- 229910044991 metal oxide Inorganic materials 0.000 claims description 6
- 150000004706 metal oxides Chemical class 0.000 claims description 6
- 239000001307 helium Substances 0.000 claims description 5
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 4
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 125000003253 isopropoxy group Chemical group [H]C([H])([H])C([H])(O*)C([H])([H])[H] 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 125000000008 (C1-C10) alkyl group Chemical group 0.000 claims description 2
- ITHRAOOOYVKKRL-UHFFFAOYSA-N C1(C=CC=C1)[Sr] Chemical compound C1(C=CC=C1)[Sr] ITHRAOOOYVKKRL-UHFFFAOYSA-N 0.000 claims description 2
- 239000003570 air Substances 0.000 claims description 2
- 125000002947 alkylene group Chemical group 0.000 claims description 2
- 229910021529 ammonia Inorganic materials 0.000 claims description 2
- OGHBATFHNDZKSO-UHFFFAOYSA-N propan-2-olate Chemical compound CC(C)[O-] OGHBATFHNDZKSO-UHFFFAOYSA-N 0.000 claims description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 17
- 239000010410 layer Substances 0.000 description 106
- 238000005229 chemical vapour deposition Methods 0.000 description 28
- 239000002356 single layer Substances 0.000 description 26
- 239000000463 material Substances 0.000 description 20
- 239000003990 capacitor Substances 0.000 description 17
- 239000010408 film Substances 0.000 description 17
- 238000006243 chemical reaction Methods 0.000 description 15
- 238000001704 evaporation Methods 0.000 description 12
- 230000008020 evaporation Effects 0.000 description 12
- 229910052710 silicon Inorganic materials 0.000 description 10
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 9
- 239000000376 reactant Substances 0.000 description 9
- 239000010703 silicon Substances 0.000 description 9
- 239000007787 solid Substances 0.000 description 9
- 239000000126 substance Substances 0.000 description 9
- 230000015572 biosynthetic process Effects 0.000 description 8
- 210000004027 cell Anatomy 0.000 description 8
- 150000002430 hydrocarbons Chemical class 0.000 description 8
- 229920006395 saturated elastomer Polymers 0.000 description 8
- 239000002904 solvent Substances 0.000 description 8
- 238000000026 X-ray photoelectron spectrum Methods 0.000 description 7
- 230000004888 barrier function Effects 0.000 description 7
- 239000007788 liquid Substances 0.000 description 7
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 6
- 238000009792 diffusion process Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 239000012535 impurity Substances 0.000 description 6
- 208000032005 Spinocerebellar ataxia with axonal neuropathy type 2 Diseases 0.000 description 5
- 238000002441 X-ray diffraction Methods 0.000 description 5
- 208000033361 autosomal recessive with axonal neuropathy 2 spinocerebellar ataxia Diseases 0.000 description 5
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 125000001931 aliphatic group Chemical group 0.000 description 4
- 239000004020 conductor Substances 0.000 description 4
- 125000004122 cyclic group Chemical group 0.000 description 4
- 239000003989 dielectric material Substances 0.000 description 4
- 150000002739 metals Chemical class 0.000 description 4
- 239000007800 oxidant agent Substances 0.000 description 4
- 238000005240 physical vapour deposition Methods 0.000 description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- 125000001424 substituent group Chemical group 0.000 description 4
- 125000003118 aryl group Chemical group 0.000 description 3
- 230000000712 assembly Effects 0.000 description 3
- 238000000429 assembly Methods 0.000 description 3
- 125000004429 atom Chemical group 0.000 description 3
- 239000005380 borophosphosilicate glass Substances 0.000 description 3
- 239000006227 byproduct Substances 0.000 description 3
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 3
- 125000000962 organic group Chemical group 0.000 description 3
- 239000003960 organic solvent Substances 0.000 description 3
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 3
- 229920005591 polysilicon Polymers 0.000 description 3
- 229930195734 saturated hydrocarbon Natural products 0.000 description 3
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 3
- 239000010409 thin film Substances 0.000 description 3
- 229930195735 unsaturated hydrocarbon Natural products 0.000 description 3
- 238000005019 vapor deposition process Methods 0.000 description 3
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- 229910002367 SrTiO Inorganic materials 0.000 description 2
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- 125000002723 alicyclic group Chemical group 0.000 description 2
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 2
- 150000001342 alkaline earth metals Chemical class 0.000 description 2
- 125000003342 alkenyl group Chemical group 0.000 description 2
- 125000000304 alkynyl group Chemical group 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 238000003877 atomic layer epitaxy Methods 0.000 description 2
- 239000011203 carbon fibre reinforced carbon Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000013626 chemical specie Substances 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 230000001627 detrimental effect Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 230000005669 field effect Effects 0.000 description 2
- 238000010574 gas phase reaction Methods 0.000 description 2
- 125000000623 heterocyclic group Chemical group 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000001451 molecular beam epitaxy Methods 0.000 description 2
- 150000002902 organometallic compounds Chemical class 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 230000009257 reactivity Effects 0.000 description 2
- 229910052707 ruthenium Inorganic materials 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 229910021332 silicide Inorganic materials 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 210000002325 somatostatin-secreting cell Anatomy 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- MZLGASXMSKOWSE-UHFFFAOYSA-N tantalum nitride Chemical compound [Ta]#N MZLGASXMSKOWSE-UHFFFAOYSA-N 0.000 description 2
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 2
- 229910052718 tin Inorganic materials 0.000 description 2
- 229910052721 tungsten Inorganic materials 0.000 description 2
- 239000006200 vaporizer Substances 0.000 description 2
- JBRZTFJDHDCESZ-UHFFFAOYSA-N AsGa Chemical compound [As]#[Ga] JBRZTFJDHDCESZ-UHFFFAOYSA-N 0.000 description 1
- XWEUUHFMEWZZNX-UHFFFAOYSA-N C(C)(C)C1=C(C(C=C1)(C(C)C)[Sr]C1(C(=C(C=C1)C(C)C)C(C)C)C(C)C)C(C)C Chemical compound C(C)(C)C1=C(C(C=C1)(C(C)C)[Sr]C1(C(=C(C=C1)C(C)C)C(C)C)C(C)C)C(C)C XWEUUHFMEWZZNX-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 1
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 229910004166 TaN Inorganic materials 0.000 description 1
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 150000001338 aliphatic hydrocarbons Chemical class 0.000 description 1
- 125000003545 alkoxy group Chemical group 0.000 description 1
- 125000002877 alkyl aryl group Chemical group 0.000 description 1
- 150000001343 alkyl silanes Chemical class 0.000 description 1
- 125000004390 alkyl sulfonyl group Chemical group 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- 125000003710 aryl alkyl group Chemical group 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 125000004181 carboxyalkyl group Chemical group 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 150000005829 chemical entities Chemical class 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 150000004292 cyclic ethers Chemical class 0.000 description 1
- 125000000753 cycloalkyl group Chemical group 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- VJDVOZLYDLHLSM-UHFFFAOYSA-N diethylazanide;titanium(4+) Chemical compound [Ti+4].CC[N-]CC.CC[N-]CC.CC[N-]CC.CC[N-]CC VJDVOZLYDLHLSM-UHFFFAOYSA-N 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- HTXDPTMKBJXEOW-UHFFFAOYSA-N dioxoiridium Chemical compound O=[Ir]=O HTXDPTMKBJXEOW-UHFFFAOYSA-N 0.000 description 1
- 238000000407 epitaxy Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 125000001033 ether group Chemical group 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 125000001153 fluoro group Chemical group F* 0.000 description 1
- 238000000171 gas-source molecular beam epitaxy Methods 0.000 description 1
- 125000001188 haloalkyl group Chemical group 0.000 description 1
- 150000008282 halocarbons Chemical class 0.000 description 1
- 125000005843 halogen group Chemical group 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 125000003187 heptyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000004356 hydroxy functional group Chemical group O* 0.000 description 1
- 125000002768 hydroxyalkyl group Chemical group 0.000 description 1
- 238000011065 in-situ storage 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
- 229910000457 iridium oxide Inorganic materials 0.000 description 1
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 229910052743 krypton Inorganic materials 0.000 description 1
- DNNSSWSSYDEUBZ-UHFFFAOYSA-N krypton atom Chemical compound [Kr] DNNSSWSSYDEUBZ-UHFFFAOYSA-N 0.000 description 1
- 150000002596 lactones Chemical class 0.000 description 1
- 229910052746 lanthanum Inorganic materials 0.000 description 1
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 229910052914 metal silicate Inorganic materials 0.000 description 1
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 1
- 125000002950 monocyclic group Chemical group 0.000 description 1
- 125000000740 n-pentyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000004123 n-propyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 229910052754 neon Inorganic materials 0.000 description 1
- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical compound [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 150000002825 nitriles Chemical class 0.000 description 1
- 125000004971 nitroalkyl group Chemical group 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- NFHFRUOZVGFOOS-UHFFFAOYSA-N palladium;triphenylphosphane Chemical compound [Pd].C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1 NFHFRUOZVGFOOS-UHFFFAOYSA-N 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000001020 plasma etching Methods 0.000 description 1
- 125000005575 polycyclic aromatic hydrocarbon group Chemical group 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000004151 rapid thermal annealing Methods 0.000 description 1
- 239000012713 reactive precursor Substances 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
- 229910001925 ruthenium oxide Inorganic materials 0.000 description 1
- WOCIAKWEIIZHES-UHFFFAOYSA-N ruthenium(iv) oxide Chemical compound O=[Ru]=O WOCIAKWEIIZHES-UHFFFAOYSA-N 0.000 description 1
- 229910052594 sapphire Inorganic materials 0.000 description 1
- 239000010980 sapphire Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 description 1
- 239000002210 silicon-based material Substances 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000011550 stock solution Substances 0.000 description 1
- 125000004964 sulfoalkyl group Chemical group 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 238000006557 surface reaction Methods 0.000 description 1
- MNWRORMXBIWXCI-UHFFFAOYSA-N tetrakis(dimethylamido)titanium Chemical compound CN(C)[Ti](N(C)C)(N(C)C)N(C)C MNWRORMXBIWXCI-UHFFFAOYSA-N 0.000 description 1
- 150000003568 thioethers Chemical class 0.000 description 1
- XJDNKRIXUMDJCW-UHFFFAOYSA-J titanium tetrachloride Chemical compound Cl[Ti](Cl)(Cl)Cl XJDNKRIXUMDJCW-UHFFFAOYSA-J 0.000 description 1
- VXUYXOFXAQZZMF-UHFFFAOYSA-N titanium(IV) isopropoxide Chemical compound CC(C)O[Ti](OC(C)C)(OC(C)C)OC(C)C VXUYXOFXAQZZMF-UHFFFAOYSA-N 0.000 description 1
- YONPGGFAJWQGJC-UHFFFAOYSA-K titanium(iii) chloride Chemical compound Cl[Ti](Cl)Cl YONPGGFAJWQGJC-UHFFFAOYSA-K 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
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Abstract
Description
本出願は2007年2月14日出願の米国特許出願No. 11/705,992の優先権を主張し、その全容は引用により本明細書に組み込まれる。
実施例1:有機金属ストロンチウム前駆体化合物としてSr(thd)2を、チタン前駆体化合物としてTi(mpd)(thd)2を、反応ガスとしてオゾンを使用するALDによって、白金基板上にチタン酸ストロンチウム層を堆積した。チタン前駆体の流速は0.8ミリリットル(ml)毎分、ストロンチウム前駆体の流速は0.8 ml毎分、オゾンの流速は容量で15%のオゾンを用いて3標準リットル毎分(slm)であった。酸化チタンおよび酸化ストロンチウムの各堆積サイクルの後、15〜30秒間、0.4〜1 ml毎分の流速で、テトラヒドロフランを用いてラインを洗い流した。堆積は、290℃の気化器温度、1〜2 Torr(1.3 x 102〜2.6 x 102 Pa)のプロセス温度、および300℃から350℃の基板温度を用いて実行した。20 mTorr(2.7 Pa)ベースにポンプダウンするために、ターボポンプを用いてポンピングを行った。
本明細書に記載の方法のいくつかの実施形態は、基板(例えば半導体基板もしくは基板アセンブリ)上に金属含有層を形成し得る。本方法は以下を含んでよい。少なくとも一つのチタン前駆体化合物を含む蒸気を提供するステップ;少なくとも一つの有機金属ストロンチウム前駆体化合物を含む蒸気を提供するステップ;随意に反応ガス(例えば酸化ガス)を提供するステップ;少なくとも一つのチタン前駆体化合物を含む蒸気と、少なくとも一つのストロンチウム前駆体化合物を含む蒸気と、随意に反応ガスとを基板に接触させ、複数の堆積サイクルを含む原子層堆積プロセスを用いて基板の少なくとも一表面上に金属含有層を形成するステップ。特定の実施形態では、複数の堆積サイクルは、少なくとも一回の酸化チタン堆積サイクルを含む初期酸化チタン堆積段階を含む。他の特定の実施形態では、複数の堆積サイクルは、少なくとも一回の酸化チタン堆積サイクルを含む最終酸化チタン堆積段階を含む。さらに他の特定の実施形態では、複数の堆積サイクルは、初期酸化チタン堆積段階と最終酸化チタン堆積段階の両方を含み、両段階は少なくとも一回の酸化チタン堆積サイクルを含む。特定の実施形態では、複数の堆積サイクルは、複数の酸化ストロンチウム堆積サイクルと複数の酸化チタン堆積サイクルを含む中間堆積段階をさらに含む。随意に、本方法は、例えばチタン酸ストロンチウム層(例えば誘電体層)を形成するために金属含有層をアニールするステップをさらに含んでもよい。特定の実施形態では、チタン酸ストロンチウム層は低炭素含有量(例えば低炭酸ストロンチウム含有量)を持ち得る。
Claims (59)
- 少なくとも一つのチタン前駆体化合物を含む蒸気を提供するステップと、
少なくとも一つの有機金属ストロンチウム前駆体化合物を含む蒸気を提供するステップと、
前記少なくとも一つのチタン前駆体化合物を含む前記蒸気と、前記少なくとも一つのストロンチウム前駆体化合物を含む前記蒸気とを基板に接触させ、複数の堆積サイクルを含む原子層堆積プロセスを用いて、前記基板の少なくとも一表面上に金属含有層を形成するステップであって、前記複数の堆積サイクルは、少なくとも一回の酸化チタン堆積サイクルを含む初期酸化チタン堆積段階と、少なくとも一回の酸化チタン堆積サイクルを含む最終酸化チタン堆積段階とを含む、ステップと、
を含む、基板上に金属含有層を形成する方法。 - 前記初期酸化チタン堆積段階は、1ナノメートル未満の厚さの酸化チタン層を堆積する、請求項1記載の方法。
- 前記最終酸化チタン堆積段階は、最大で1ナノメートルの厚さの酸化チタン層を堆積する、請求項1記載の方法。
- 前記複数の堆積サイクルは、複数の酸化ストロンチウム堆積サイクルと、複数の酸化チタン堆積サイクルとを含む中間堆積段階をさらに含む、請求項1記載の方法。
- 前記中間堆積段階は、少なくとも1ナノメートルの厚さの金属酸化物層を堆積する、請求項4記載の方法。
- 前記中間堆積段階は、最大で40ナノメートルの厚さの金属酸化物層を堆積する、請求項4記載の方法。
- 前記堆積された金属含有層をアニールするステップをさらに含む、請求項4記載の方法。
- アニールするステップは、前記金属含有層を少なくとも400℃の温度に晒すステップを含む、請求項7記載の方法。
- アニールするステップは、前記金属含有層を最大で1000℃のアニーリング温度に晒すステップを含む、請求項7記載の方法。
- アニールするステップは、前記金属含有層を少なくとも0.5分間、前記アニーリング温度に晒すステップを含む、請求項8記載の方法。
- アニールするステップは、前記金属含有層を最大で1時間、前記アニーリング温度に晒すステップを含む、請求項8記載の方法。
- アニールするステップはチタン酸ストロンチウム層を形成する、請求項7記載の方法。
- 前記チタン酸ストロンチウム層は誘電体層である、請求項12記載の方法。
- 前記チタン酸ストロンチウム層は0.9:1.0から1.0:0.9のSr:Ti原子比率を持つ、請求項12記載の方法。
- 前記チタン酸ストロンチウム層は、金属原子に基づき最大で5原子百分率の炭酸ストロンチウム含有量を持つ、請求項12記載の方法。
- 少なくとも一つのチタン前駆体化合物を含む蒸気を提供するステップと、
少なくとも一つの有機金属ストロンチウム前駆体化合物を含む蒸気を提供するステップと、
少なくとも一つの反応ガスを提供するステップと、
前記少なくとも一つのチタン前駆体化合物を含む前記蒸気と、前記少なくとも一つのストロンチウム前駆体化合物を含む前記蒸気と、前記少なくとも一つの反応ガスとを基板に接触させ、複数の堆積サイクルを含む原子層堆積プロセスを用いて、前記基板の少なくとも一表面上に金属含有層を形成するステップであって、前記複数の堆積サイクルは、少なくとも一回の酸化チタン堆積サイクルを含む初期酸化チタン堆積段階と、少なくとも一回の酸化チタン堆積サイクルを含む最終酸化チタン堆積段階とを含む、ステップと、
を含む、基板上に金属含有層を形成する方法。 - 前記少なくとも一つの反応ガスは酸化ガスである、請求項16記載の方法。
- 前記少なくとも一つの反応ガスは、空気、酸素、水蒸気、オゾン、窒素酸化物、過酸化水素、アルコール、アンモニア、およびそれらの組み合わせからなる群から選択される、請求項16記載の方法。
- 前記有機金属ストロンチウム前駆体化合物は、β-ジケトナートストロンチウム、β-ジケチミナートストロンチウム、アミジナートストロンチウム、シクロペンタジエニルストロンチウム、ジオルガノアミドストロンチウム、カルボン酸ストロンチウム、ストロンチウムアルコキシド、およびそれらの組み合わせからなる群から選択される、請求項16記載の方法。
- 前記チタン前駆体化合物は有機金属前駆体化合物である、請求項16記載の方法。
- 前記有機金属チタン前駆体化合物はTi(2meip)2であり、2meip=4-(2-メチルエトキシ)イミノ-2-ペンタノアートである、請求項20記載の方法。
- 少なくとも一つのチタン前駆体化合物を含む蒸気を提供するステップと、
2,2,6,6-テトラメチル-3,5-ヘプタンジオナート(thd)、1-(2-メトキシエトキシ)-2,2,6,6,-テトラメチル-3,5-ヘプタンジオナート(methd)、ヘキサフルオロアセチルアセトナート、1,1,1-トリフルオロ-2,4-ペンタンジオナート、2,2-ジメチル-6,6,7,7,8,8,8-ヘプタフルオロ-3,5-オクタンジオナート(fod)、およびそれらの組み合わせからなる群から選択される、少なくとも一つのβ-ジケトナート配位子を含む少なくとも一つのβ-ジケトナートストロンチウム前駆体化合物を含む蒸気を提供するステップと、
前記少なくとも一つのチタン前駆体化合物を含む前記蒸気と、前記少なくとも一つのストロンチウム前駆体化合物を含む前記蒸気とを基板に接触させ、複数の堆積サイクルを含む原子層堆積プロセスを用いて、前記基板の少なくとも一表面上に金属含有層を形成するステップであって、前記複数の堆積サイクルは、少なくとも一回の酸化チタン堆積サイクルを含む初期酸化チタン堆積段階と、少なくとも一回の酸化チタン堆積サイクルを含む最終酸化チタン堆積段階とを含むことを特徴とする、ステップと、
を含む、基板上に金属含有層を形成する方法。 - 前記β-ジケトナートストロンチウム前駆体化合物はSr(thd)2であり、thd=2,2,6,6-テトラメチル-3,5-ヘプタンジオナートである、請求項22記載の方法。
- 少なくとも一つの反応ガスを提供するステップをさらに含む、請求項22記載の方法。
- 化学式Ti(AR1 x)4の少なくとも一つの有機金属チタン前駆体化合物を含む蒸気を提供するステップであって、式中のAはO、N、C(O)、もしくはOC(O)であり、R1は(C1-C10)アルキル基であり、R1アルキル基のうちの二つは随意に結合してアルキレン基を形成し、x=1もしくは2であるステップと、
少なくとも一つの有機金属ストロンチウム前駆体化合物を含む蒸気を提供するステップと、
前記少なくとも一つのチタン前駆体化合物を含む前記蒸気と、前記少なくとも一つのストロンチウム前駆体化合物を含む蒸気とを基板に接触させ、複数の堆積サイクルを含む原子層堆積プロセスを用いて、前記基板の少なくとも一表面上に金属含有層を形成するステップであって、前記複数の堆積サイクルは、少なくとも一回の酸化チタン堆積サイクルを含む初期酸化チタン堆積段階と、少なくとも一回の酸化チタン堆積サイクルを含む最終酸化チタン堆積段階とを含む、ステップと、
を含む、基板上に金属含有層を形成する方法。 - 前記有機金属チタン前駆体化合物は、チタンアルコキシド、チタンアミド、チタンイミド、β-ジケトナートチタン、およびそれらの組み合わせからなる群から選択される、請求項25記載の方法。
- 前記有機金属チタン前駆体化合物は、2,2,6,6-テトラメチル-3,5-ヘプタンジオナート(thd)、1-(2-メトキシエトキシ)-2,2,6,6,-テトラメチル-3,5-ヘプタンジオナート(methd)、ヘキサフルオロアセチルアセトナート、1,1,1-トリフルオロ-2,4-ペンタンジオナート、2,2-ジメチル-6,6,7,7,8,8,8-ヘプタフルオロ-3,5-オクタンジオナート(fod)、およびそれらの組み合わせからなる群から選択される少なくとも一つのβ-ジケトナート配位子を含むβ-ジケトナートチタンである、請求項26記載の方法。
- 少なくとも一つの反応ガスを提供するステップをさらに含む、請求項25記載の方法。
- Ti(thd)2(OiPr)2、Ti(mpd)(thd)2、およびそれらの組み合わせからなる群から選択される少なくとも一つのβ-ジケトナートチタン前駆体化合物を含む蒸気を提供するステップであって、mpd=2-メチル-2,4-ペンタンジオキシ、thd=2,2,6,6-テトラメチル-3,5-ヘプタンジオナート、およびOiP=イソプロポキシドであるステップと、
少なくとも一つの有機金属ストロンチウム前駆体化合物を含む蒸気を提供するステップと、
前記少なくとも一つのチタン前駆体化合物を含む前記蒸気と、前記少なくとも一つのストロンチウム前駆体化合物を含む前記蒸気とを基板に接触させ、複数の堆積サイクルを含む原子層堆積プロセスを用いて、前記基板の少なくとも一表面上に金属含有層を形成するステップであって、前記複数の堆積サイクルは、少なくとも一回の酸化チタン堆積サイクルを含む初期酸化チタン堆積段階と、少なくとも一回の酸化チタン堆積サイクルを含む最終酸化チタン堆積段階とを含む、ステップと、
を含む、基板上に金属含有層を形成する方法。 - 少なくとも一つの反応ガスを提供するステップをさらに含む、請求項29記載の方法。
- 少なくとも一つのチタン前駆体化合物を含む蒸気を提供するステップと、
少なくとも一つの有機金属ストロンチウム前駆体化合物を含む蒸気を提供するステップと、
少なくとも一つの反応ガスを提供するステップと、
前記少なくとも一つのチタン前駆体化合物を含む前記蒸気と、前記少なくとも一つのストロンチウム前駆体化合物を含む前記蒸気とを基板に接触させ、複数の堆積サイクルを含む原子層堆積プロセスを用いて、前記基板の少なくとも一表面上に金属含有層を形成するステップであって、前記複数の堆積サイクルは、少なくとも一回の酸化チタン堆積サイクルを含む初期酸化チタン堆積段階を含む、ステップと、
を含む、基板上に金属含有層を形成する方法。 - 前記初期酸化チタン堆積段階は複数の酸化チタン堆積サイクルを含む、請求項31記載の方法。
- 前記初期酸化チタン堆積段階は1ナノメートル未満の厚さの酸化チタン層を堆積する、請求項32記載の方法。
- 前記初期酸化チタン堆積段階は少なくとも0.3ナノメートルの厚さの酸化チタン層を堆積する、請求項33記載の方法。
- 前記初期酸化チタン堆積段階は前記複数の酸化チタン堆積サイクルから本質的に構成される、請求項32記載の方法。
- 前記初期酸化チタン堆積段階は前記複数の酸化チタン堆積サイクルから構成される、請求項32記載の方法。
- 少なくとも一つのチタン前駆体化合物を含む蒸気を提供するステップと、
少なくとも一つの有機金属ストロンチウム前駆体化合物を含む蒸気を提供するステップと、
少なくとも一つの反応ガスを提供するステップと、
前記少なくとも一つのチタン前駆体化合物を含む前記蒸気と、前記少なくとも一つのストロンチウム前駆体化合物を含む前記蒸気とを基板に接触させ、複数の堆積サイクルを含む原子層堆積プロセスを用いて、前記基板の少なくとも一表面上に金属含有層を形成するステップであって、前記複数の堆積サイクルは、少なくとも一回の酸化チタン堆積サイクルを含む最終酸化チタン堆積段階を含む、ステップと、
を含む、基板上に金属含有層を形成する方法。 - 前記最終酸化チタン堆積段階は複数の酸化チタン堆積サイクルを含む、請求項37記載の方法。
- 前記最終酸化チタン堆積段階は最大で1ナノメートルの厚さの酸化チタン層を堆積する、請求項38記載の方法。
- 前記最終酸化チタン堆積段階は少なくとも0.3ナノメートルの厚さの酸化チタン層を堆積する、請求項39記載の方法。
- 前記最終酸化チタン堆積段階は前記複数の酸化チタン堆積サイクルから本質的に構成される、請求項38記載の方法。
- 前記最終酸化チタン堆積段階は前記複数の酸化チタン堆積サイクルから構成される、請求項38記載の方法。
- 少なくとも一つのチタン前駆体化合物を含む蒸気を提供するステップと、
少なくとも一つの有機金属ストロンチウム前駆体化合物を含む蒸気を提供するステップと、
少なくとも一つの反応ガスを提供するステップと、
前記少なくとも一つのチタン前駆体化合物を含む前記蒸気と、前記少なくとも一つのストロンチウム前駆体化合物を含む前記蒸気と、前記少なくとも一つの反応ガスとを半導体基板もしくは基板アセンブリに接触させ、複数の堆積サイクルを含む原子層堆積プロセスを用いて、前記半導体基板もしくは基板アセンブリの少なくとも一表面上に金属含有層を形成するステップであって、前記複数の堆積サイクルは、少なくとも一回の酸化チタン堆積サイクルを含む初期酸化チタン堆積段階と、少なくとも一回の酸化チタン堆積サイクルを含む最終酸化チタン堆積段階を含む、ステップと、
を含む、半導体構造を製造する方法。 - 前記半導体基板もしくは基板アセンブリは堆積チャンバ内に包含される、請求項43記載の方法。
- 前記堆積チャンバから一つ以上の前駆体化合物を含む過剰蒸気をパージするステップをさらに含む、請求項44記載の方法。
- パージするステップは不活性搬送ガスでパージするステップを含む、請求項45記載の方法。
- 前記不活性搬送ガスは、窒素、ヘリウム、およびアルゴンからなる群から選択される、請求項46記載の方法。
- 前記少なくとも一つのチタン前駆体化合物を含む前記蒸気と共に、前記少なくとも一つの有機金属ストロンチウム前駆体化合物を含む前記蒸気と共に、もしくはその両方と共に、一つ以上の不活性搬送ガスが前記チャンバに導入される、請求項44記載の方法。
- 少なくとも一つのチタン前駆体化合物を含む蒸気を提供するステップと、
少なくとも一つの有機金属ストロンチウム前駆体化合物を含む蒸気を提供するステップと、
前記少なくとも一つのチタン前駆体化合物を含む前記蒸気を、半導体基板もしくは基板アセンブリを包含する原子層堆積チャンバに向け、前記少なくとも一つのチタン前駆体化合物を、前記半導体基板アセンブリの少なくとも一表面に化学吸着させるステップと、
前記少なくとも一つのストロンチウム前駆体化合物を含む前記蒸気を前記原子層堆積チャンバに向け、前記少なくとも一つのストロンチウム前駆体化合物を、前記半導体基板アセンブリの少なくとも一表面に化学吸着させ、複数の堆積サイクルを含む原子層堆積プロセスを用いて前記半導体基板もしくは基板アセンブリの少なくとも一表面上に金属含有層を形成するステップであって、前記複数の堆積サイクルは、少なくとも一回の酸化チタン堆積サイクルを含む初期酸化チタン堆積段階と、少なくとも一回の酸化チタン堆積サイクルを含む最終酸化チタン堆積段階とを含む、ステップと、
を含む、半導体構造を製造する方法。 - 少なくとも一つの反応ガスを提供するステップをさらに含む、請求項49記載の方法。
- 前記少なくとも一つのチタン前駆体化合物を含む前記蒸気を前記原子層堆積チャンバに向けるステップと、前記少なくとも一つのストロンチウム前駆体化合物を含む前記蒸気を前記原子層堆積チャンバに向けるステップは、少なくとも一回繰り返される、請求項49記載の方法。
- 前記半導体基板もしくは基板アセンブリの温度は25℃から400℃である、請求項49記載の方法。
- 前記半導体基板もしくは基板アセンブリを包含する前記原子層堆積チャンバは、10-8 torr (1.3 x 10-6 Pa)から10 torr (1.3 x 103 Pa)の圧力を持つ、請求項49記載の方法。
- 前記半導体基板もしくは基板アセンブリへの化合物の化学吸着後、前記堆積チャンバから過剰蒸気をパージするステップをさらに含む、請求項49記載の方法。
- パージするステップは、不活性ガスでパージするステップを含む、請求項49記載の方法。
- 前記不活性ガスは、窒素、ヘリウム、アルゴン、およびそれらの混合物からなる群から選択される、請求項55記載の方法。
- 少なくとも一つのチタン前駆体化合物を含む蒸気を提供するステップと、
少なくとも一つの有機金属ストロンチウム前駆体化合物を含む蒸気を提供するステップと、
少なくとも一つの反応ガスを提供するステップと、
前記少なくとも一つのチタン前駆体化合物を含む前記蒸気と、前記少なくとも一つのストロンチウム前駆体化合物を含む前記蒸気とを、その上に第一電極を持つ基板に接触させ、複数の堆積サイクルを含む原子層堆積プロセスを用いて、前記基板の前記第一電極の少なくとも一部分の上に誘電体層を形成するステップであって、前記複数の堆積サイクルは、少なくとも一回の酸化チタン堆積サイクルを含む初期酸化チタン堆積段階と、少なくとも一回の酸化チタン堆積サイクルを含む最終酸化チタン堆積段階とを含む、ステップと、
前記誘電体層上に第二電極を形成するステップと、
を含む、メモリデバイスを製造する方法。 - 前記少なくとも一つのチタン前駆体化合物を含む前記蒸気と、前記少なくとも一つのストロンチウム前駆体化合物を含む前記蒸気のうちの少なくとも一つは、非反応性ガスをさらに含む、請求項57記載の方法。
- 前記非反応性ガスは、窒素、ヘリウム、アルゴン、およびそれらの組み合わせから成る群から選択される、請求項58記載の方法。
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US7892964B2 (en) | 2011-02-22 |
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TW200844254A (en) | 2008-11-16 |
CN101595244A (zh) | 2009-12-02 |
US8557697B2 (en) | 2013-10-15 |
WO2008100691A2 (en) | 2008-08-21 |
KR101179774B1 (ko) | 2012-09-04 |
US20110021001A1 (en) | 2011-01-27 |
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