JP4387723B2 - ビスマス−チタン−シリコン酸化物、ビスマス−チタン−シリコン酸化物薄膜及びその製造法 - Google Patents
ビスマス−チタン−シリコン酸化物、ビスマス−チタン−シリコン酸化物薄膜及びその製造法 Download PDFInfo
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- JP4387723B2 JP4387723B2 JP2003287506A JP2003287506A JP4387723B2 JP 4387723 B2 JP4387723 B2 JP 4387723B2 JP 2003287506 A JP2003287506 A JP 2003287506A JP 2003287506 A JP2003287506 A JP 2003287506A JP 4387723 B2 JP4387723 B2 JP 4387723B2
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- thin film
- precursor
- bismuth
- titanium
- manufacturing
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- 239000010409 thin film Substances 0.000 title claims description 158
- 238000004519 manufacturing process Methods 0.000 title claims description 34
- HIOAKZIMACQAFD-UHFFFAOYSA-N [Si]=O.[Ti].[Bi] Chemical compound [Si]=O.[Ti].[Bi] HIOAKZIMACQAFD-UHFFFAOYSA-N 0.000 title claims description 7
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Inorganic materials [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 claims description 125
- 229910018557 Si O Inorganic materials 0.000 claims description 124
- 239000002243 precursor Substances 0.000 claims description 109
- 239000010936 titanium Substances 0.000 claims description 96
- 239000000203 mixture Substances 0.000 claims description 63
- 238000000034 method Methods 0.000 claims description 62
- 239000000758 substrate Substances 0.000 claims description 51
- 238000010438 heat treatment Methods 0.000 claims description 46
- 239000010408 film Substances 0.000 claims description 39
- 229910052719 titanium Inorganic materials 0.000 claims description 39
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 37
- 229910052797 bismuth Inorganic materials 0.000 claims description 36
- 239000003990 capacitor Substances 0.000 claims description 36
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 claims description 34
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical group CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims description 30
- 239000000126 substance Substances 0.000 claims description 29
- 230000001590 oxidative effect Effects 0.000 claims description 26
- 239000012686 silicon precursor Substances 0.000 claims description 26
- 239000006200 vaporizer Substances 0.000 claims description 22
- 239000011261 inert gas Substances 0.000 claims description 18
- 239000002904 solvent Substances 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 12
- YNPNZTXNASCQKK-UHFFFAOYSA-N Phenanthrene Natural products C1=CC=C2C3=CC=CC=C3C=CC2=C1 YNPNZTXNASCQKK-UHFFFAOYSA-N 0.000 claims description 10
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 claims description 10
- DGEZNRSVGBDHLK-UHFFFAOYSA-N [1,10]phenanthroline Chemical compound C1=CN=C2C3=NC=CC=C3C=CC2=C1 DGEZNRSVGBDHLK-UHFFFAOYSA-N 0.000 claims description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 10
- DKPFZGUDAPQIHT-UHFFFAOYSA-N butyl acetate Chemical compound CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 claims description 10
- IIEWJVIFRVWJOD-UHFFFAOYSA-N ethylcyclohexane Chemical compound CCC1CCCCC1 IIEWJVIFRVWJOD-UHFFFAOYSA-N 0.000 claims description 10
- 239000001301 oxygen Substances 0.000 claims description 10
- 229910052760 oxygen Inorganic materials 0.000 claims description 10
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims description 8
- 238000010926 purge Methods 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- YRAJNWYBUCUFBD-UHFFFAOYSA-N 2,2,6,6-tetramethylheptane-3,5-dione Chemical compound CC(C)(C)C(=O)CC(=O)C(C)(C)C YRAJNWYBUCUFBD-UHFFFAOYSA-N 0.000 claims description 5
- RVKPQXGYBPTWPT-UHFFFAOYSA-N 3-methylhexane-2,2-diol Chemical compound CCCC(C)C(C)(O)O RVKPQXGYBPTWPT-UHFFFAOYSA-N 0.000 claims description 5
- 229910003902 SiCl 4 Inorganic materials 0.000 claims description 5
- KVNRLNFWIYMESJ-UHFFFAOYSA-N butyronitrile Chemical compound CCCC#N KVNRLNFWIYMESJ-UHFFFAOYSA-N 0.000 claims description 5
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 claims description 5
- 230000003647 oxidation Effects 0.000 claims description 5
- 238000007254 oxidation reaction Methods 0.000 claims description 5
- 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 claims description 5
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims description 5
- 239000004065 semiconductor Substances 0.000 claims description 5
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 claims description 5
- CUYORGNTEMJARP-UHFFFAOYSA-N tris[(1-methoxy-2-methylpropan-2-yl)oxy]bismuthane Chemical compound COCC(C)(C)O[Bi](OC(C)(C)COC)OC(C)(C)COC CUYORGNTEMJARP-UHFFFAOYSA-N 0.000 claims description 5
- 229910004339 Ti-Si Inorganic materials 0.000 claims description 4
- 229910010978 Ti—Si Inorganic materials 0.000 claims description 4
- BUUSNVSJZVGMFY-UHFFFAOYSA-N 4-ethylheptane-3,3-diol Chemical compound CCCC(CC)C(O)(O)CC BUUSNVSJZVGMFY-UHFFFAOYSA-N 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 2
- 239000012071 phase Substances 0.000 claims 8
- 150000001602 bicycloalkyls Chemical group 0.000 claims 1
- 238000001947 vapour-phase growth Methods 0.000 claims 1
- 239000000243 solution Substances 0.000 description 35
- 229910004298 SiO 2 Inorganic materials 0.000 description 13
- 238000000231 atomic layer deposition Methods 0.000 description 13
- 239000007789 gas Substances 0.000 description 10
- 238000007740 vapor deposition Methods 0.000 description 10
- 239000013078 crystal Substances 0.000 description 8
- 238000000151 deposition Methods 0.000 description 8
- 230000008021 deposition Effects 0.000 description 7
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Substances [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 7
- 238000002441 X-ray diffraction Methods 0.000 description 6
- 150000001768 cations Chemical class 0.000 description 6
- 238000004549 pulsed laser deposition Methods 0.000 description 6
- 229910052710 silicon Inorganic materials 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 239000003960 organic solvent Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 238000002425 crystallisation Methods 0.000 description 3
- 230000008025 crystallization Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000002354 inductively-coupled plasma atomic emission spectroscopy Methods 0.000 description 3
- 238000001451 molecular beam epitaxy Methods 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- 125000006850 spacer group Chemical group 0.000 description 3
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910002367 SrTiO Inorganic materials 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 150000001450 anions Chemical class 0.000 description 2
- 238000000137 annealing Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000005229 chemical vapour deposition Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000003989 dielectric material Substances 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 229910015902 Bi 2 O 3 Inorganic materials 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 206010021143 Hypoxia Diseases 0.000 description 1
- NIPNSKYNPDTRPC-UHFFFAOYSA-N N-[2-oxo-2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 NIPNSKYNPDTRPC-UHFFFAOYSA-N 0.000 description 1
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- VKJLWXGJGDEGSO-UHFFFAOYSA-N barium(2+);oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[O-2].[Ti+4].[Ba+2] VKJLWXGJGDEGSO-UHFFFAOYSA-N 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- CDQSJQSWAWPGKG-UHFFFAOYSA-N butane-1,1-diol Chemical compound CCCC(O)O CDQSJQSWAWPGKG-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 125000004177 diethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- -1 for example Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 150000002500 ions Chemical group 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
- 239000003446 ligand Substances 0.000 description 1
- 230000015654 memory Effects 0.000 description 1
- 229910052762 osmium Inorganic materials 0.000 description 1
- SYQBFIAQOQZEGI-UHFFFAOYSA-N osmium atom Chemical compound [Os] SYQBFIAQOQZEGI-UHFFFAOYSA-N 0.000 description 1
- JMOHEPRYPIIZQU-UHFFFAOYSA-N oxygen(2-);tantalum(2+) Chemical compound [O-2].[Ta+2] JMOHEPRYPIIZQU-UHFFFAOYSA-N 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 229910052707 ruthenium Inorganic materials 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- PWYYWQHXAPXYMF-UHFFFAOYSA-N strontium(2+) Chemical compound [Sr+2] PWYYWQHXAPXYMF-UHFFFAOYSA-N 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
Classifications
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- 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
- H01L21/02104—Forming layers
- H01L21/02107—Forming insulating materials on a substrate
- H01L21/02109—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates
- H01L21/02112—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer
- H01L21/02123—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing silicon
- H01L21/02164—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing silicon the material being a silicon oxide, e.g. SiO2
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G29/00—Compounds of bismuth
- C01G29/006—Compounds containing, besides bismuth, two or more other elements, with the exception of oxygen or hydrogen
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/16—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silicates other than clay
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/46—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates
- C04B35/462—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates based on titanates
- C04B35/475—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates based on titanates based on bismuth titanates
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/62605—Treating the starting powders individually or as mixtures
- C04B35/62625—Wet mixtures
- C04B35/6264—Mixing media, e.g. organic solvents
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- 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
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- H01L21/02123—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing silicon
- H01L21/02142—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing silicon the material containing silicon and at least one metal element, e.g. metal silicate based insulators or metal silicon oxynitrides
- H01L21/02153—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing silicon the material containing silicon and at least one metal element, e.g. metal silicate based insulators or metal silicon oxynitrides the material containing titanium, e.g. TiSiOx
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
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- H01L21/02104—Forming layers
- H01L21/02107—Forming insulating materials on a substrate
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- H01L21/02123—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing silicon
- H01L21/02142—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing silicon the material containing silicon and at least one metal element, e.g. metal silicate based insulators or metal silicon oxynitrides
- H01L21/02161—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing silicon the material containing silicon and at least one metal element, e.g. metal silicate based insulators or metal silicon oxynitrides the material containing more than one metal element
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- H01L21/02107—Forming insulating materials on a substrate
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- 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
- H01L21/02104—Forming layers
- H01L21/02107—Forming insulating materials on a substrate
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- H01L21/02208—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates the layer being characterised by the precursor material for deposition the precursor containing a compound comprising Si
- H01L21/02211—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates the layer being characterised by the precursor material for deposition the precursor containing a compound comprising Si the compound being a silane, e.g. disilane, methylsilane or chlorosilane
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- 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
- H01L21/02104—Forming layers
- H01L21/02107—Forming insulating materials on a substrate
- H01L21/02109—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates
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- H01L21/02208—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates the layer being characterised by the precursor material for deposition the precursor containing a compound comprising Si
- H01L21/02214—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates the layer being characterised by the precursor material for deposition the precursor containing a compound comprising Si the compound comprising silicon and oxygen
- H01L21/02216—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates the layer being characterised by the precursor material for deposition the precursor containing a compound comprising Si the compound comprising silicon and oxygen the compound being a molecule comprising at least one silicon-oxygen bond and the compound having hydrogen or an organic group attached to the silicon or oxygen, e.g. a siloxane
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
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- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
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- H01L21/02107—Forming insulating materials on a substrate
- H01L21/02225—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer
- H01L21/02227—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a process other than a deposition process
- H01L21/02255—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a process other than a deposition process formation by thermal treatment
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
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Description
Bi2(Ti2-xSix)O7-y
Bi2(Ti2-xSix)O7-y
ス圧力を0.1〜0.5torr、反復率を5Hzほどとする。
Bi(MMP)3のECH溶液(0.4mol/L)22.5ml、Ti(MMP)4のECH溶液(0.4mol/L)37.5ml、TEOS 3.6mlを混合してECH溶媒内にてBi(MMP)3、Ti(MMP)4、TEOSの濃度がそれぞれ0.045mol/L、0.075mol/L、0.08mol/LであるBi−Ti−Si−O薄膜形成用プレカーサ混合物を準備した。
Bi(MMP)3のECH溶液(0.4mol/L)22.5ml、Ti(MMP)4のECH溶液(0.4mol/L)37.5ml、TEOS 3.6mlを混合してECH溶媒内にBi(MMP)3、Ti(MMP)4、TEOSの濃度がそれぞれ0.045mol/L、0.075mol/L、0.08mol/LであるBi−Ti−Si−O薄膜形成用プレカーサ混合物を準備した。
Tox={(Si02の誘電率)(キャパシタの上部電極面積)/キャパシタのキャパシタンス}
12 伝導性領域
13 ゲート電極
14 ゲート絶縁膜
15a ソース電極
15b ドレイン電極
16 非活性領域
17 スペーサ
18 下部電極
19 誘電体薄膜
20 上部電極
21 キャパシタ
Claims (22)
- 化学式(1)で示される、パイロクロア相を有するビスマス−チタン−シリコン酸化物(Bi−Ti−Si−O)。
Bi2(Ti2-xSix)O7-y (1)
(前記式中、xは0.8ないし1.3の数であり、yは−1ないし1の数である。) - 化学式(1)で示される、パイロクロア相を有するビスマス−チタン−シリコン酸化物を含むBi−Ti−Si−O薄膜。
Bi2(Ti2-xSix)O7-y (1)
(前記式中、xは0.8ないし1.3の数であり、yは−1ないし1の数である。) - (a1)非酸化性雰囲気下で、ビスマスプレカーサ、チタンプレカーサ及びシリコンプレカーサの混合物を気化器内に供給し、それを基板表面に吸着させる段階と、
(b1)前記基板表面に吸着された結果物を酸化させて原子層を蒸着させる段階と、を含むことを特徴とする、化学式(1)で示される、パイロクロア相を有するBi−Ti−Si−O薄膜の製造法。
Bi2(Ti2-xSix)O7-y (1)
(前記式中、xは0.8ないし1.3の数であり、yは−1ないし1の数である。) - 前記(b1)段階以前に、前記基板表面に不活性ガスをパージする段階をさらに含むことを特徴とする、請求項3に記載の化学式(1)で示されるBi−Ti−Si−O薄膜の製造法。
- 前記(b1)段階以後に、熱処理する段階をさらに含むことを特徴とする、請求項3に記載のBi−Ti−Si−O薄膜の製造法。
- 前記熱処理段階が500〜800℃の温度範囲で、酸化雰囲気、不活性ガス雰囲気または真空条件下でなされることを特徴とする、請求項5に記載のBi−Ti−Si−O薄膜の製造法。
- 前記(a1)段階のビスマスプレカーサ、チタンプレカーサ及びシリコンプレカーサの混合物が直接液体注入(DLI)方式により気化器内に供給されることを特徴とする、請求項3に記載のBi−Ti−Si−O薄膜の製造法。
- 前記(a1)段階にてビスマスプレカーサ、チタンプレカーサ及びシリコンプレカーサの混合物が、
ビスマスプレカーサ、チタンプレカーサ及びシリコンプレカーサがエチルシクロヘキサン、テトラヒドロフラン、n−ブチルアセテート、ブチロニトリルよりなる群から選択された一つ以上の溶媒に溶解して得たことを特徴とする、請求項3に記載のBi−Ti−Si−O薄膜の製造法。 - 前記(a1)段階の非酸化性雰囲気が、不活性ガスによりなることを特徴とする、請求項3に記載のBi−Ti−Si−O薄膜の製造法。
- 前記(a1)段階のビスマスプレカーサが、Bi(MMP)3{トリス(1−メトキシ−2−メチル−2−プロポキシ)ビスマス}、Bi(phen)3(ただし、phenはフェニルを示す)、BiCl3よりなる群から選択された一つ以上であり、
前記チタンプレカーサが、Ti(MMP)4{テトラキス(1−メトキシ−2−メチル−2−プロポキシ)チタン}、TiO(tmhd)2(ただし、tmhdは2,2,6,6−テトラメチルヘプタン−3,5−ジオンを示す)、Ti(i−OPr)2(tmhd)2(ただし、i−OPrはイソプロピル基を示す)、Ti(dmpd)(tmhd)2(ただし、dmpdはジメチルペンタンジオールを示す)、Ti(depd)(tmhd)2(ただし、depdはジエチルペンタンジオールを示す)、TiCl4よりなる群から選択された一つ以上であり、
前記シリコンプレカーサがテトラエチルオルトシリケート(TEOS)、SiCl4よりなる群から選択された一つ以上であることを特徴とする、請求項3に記載のBi−Ti−Si−O薄膜の製造法。 - 前記(b1)段階の酸化が酸素、オゾンまたは水蒸気によりなされることを特徴とする、請求項3に記載のBi−Ti−Si−O薄膜の製造法。
- (a2)反応器内部を酸化雰囲気にする段階と、
(b2)ビスマスプレカーサ、チタンプレカーサ及びシリコンプレカーサの混合物を反応器内に供給し、それを基板表面に気相蒸着させる段階と、を含むことを特徴とする、化学式(1)で示されるパイロクロア相を有するBi−Ti−Si−O薄膜の製造法。
Bi2(Ti2-xSix)O7-y (1)
(前記式中、xは0.8ないし1.3の数であり、yは−1ないし1の数である。) - 前記(b2)段階以後に熱処理段階をさらに含むことを特徴とする、請求項12に記載の化学式(1)で示されるBi−Ti−Si−O薄膜の製造法。
- 前記熱処理段階が500〜800℃にて、酸化雰囲気、不活性ガス雰囲気または真空条件下でなされることを特徴とする、請求項13に記載の化学式(1)で示されるBi−Ti−Si−O薄膜の製造法。
- 前記(a2)段階の酸化雰囲気が酸素、オゾンまたは水蒸気により組成されることを特徴とする、請求項12に記載の化学式(1)で示されるBi−Ti−Si−O薄膜の製造法。
- 前記(b2)段階のビスマスプレカーサ、チタンプレカーサ及びシリコンプレカーサの混合物がDLI方式により反応器内に供給されることを特徴とする、請求項12に記載の化学式(1)で示されるBi−Ti−Si−O薄膜の製造法。
- 前記(b2)段階にて、
ビスマスプレカーサ、チタンプレカーサ及びシリコンプレカーサの混合物が、
ビスマスプレカーサ、チタンプレカーサ及びシリコンプレカーサがエチルシクロヘキサン、テトラヒドロフラン、n−ブチルアセテート、ブチロニトリルよりなる群から選択された一つ以上の溶媒に溶解して得ることを特徴とする、請求項12に記載のBi−Ti−Si−O薄膜の製造法。 - 前記(b2)段階のビスマスプレカーサが、Bi(MMP)3{トリス(1−メトキシ−2−メチル−2−プロポキシ)ビスマス}、Bi(phen) 3 (ただし、phenはフェニルを示す)、BiCl3よりなる群から選択された一つ以上であり、
前記チタンプレカーサが、Ti(MMP)4{テトラキス(1−メトキシ−2−メチル−2−プロポキシ)チタン}、TiO(tmhd) 2 (ただし、tmhdは2,2,6,6−テトラメチルヘプタン−3,5−ジオンを示す)、Ti(i−OPr)2(tmhd)2(ただし、i−OPrはイソプロピル基を示す)、Ti(dmpd)(tmhd)2(ただし、dmpdはジメチルペンタンジオールを示す)、Ti(depd)(tmhd)2(ただし、depdはジエチルペンタンジオールを示す)、TiCl4よりなる群から選択された一つ以上であり、
前記シリコンプレカーサがTEOS、SiCl4よりなる群から選択された一つ以上であることを特徴とする、請求項12に記載のBi−Ti−Si−O薄膜の製造法。 - 下部電極と、
前記下部電極上部に形成された化学式(1)で示されるパイロクロア相を有するビスマス−チタン−シリコン酸化物よりなる誘電体膜と、前記誘電体膜上部に形成された上部電極とを含むことを特徴とする半導体装置のキャパシタ。
Bi2(Ti2-xSix)O7-y (1)
(前記式中、xは0.8ないし1.3の数であり、yは−1ないし1の数である。) - ソース電極と、
ドレイン電極と、
前記ソース電極とドレイン電極間に伝導性領域を有する基板と、
前記伝導性領域上部に形成されており、化学式(1)で示される、パイロクロア相を有するビスマス−チタン−シリコン酸化物よりなるゲート絶縁膜と、
前記ゲート絶縁膜上部に形成されたゲート電極と、を含むことを特徴とする半導体装置のトランジスタ。
Bi2(Ti2-xSix)O7-y (1)
(前記式中、xは0.8ないし1.3の数であり、yは−1ないし1の数である。) - 下部電極と、前記下部電極上部に形成された、化学式(1)で示される、パイロクロア相を有するBi−Ti−Si−Oよりなる誘電体膜と、前記誘電体膜上部に形成された上部電極を含むキャパシタと、
ソース電極と、ドレイン電極と、前記ソース電極とドレイン電極間に伝導性領域を有する基板と、前記伝導性領域上部に形成されており、化学式(1)で示される、パイロクロア相を有するBi−Ti−Si−Oよりなるゲート絶縁膜と、前記ゲート絶縁膜上部に形成されたゲート電極とを含んでなるトランジスタのうち選択された一つ以上を採用することを特徴とする電子素子。
Bi2(Ti2-xSix)O7-y (1)
(前記式中、xは0.8ないし1.3の数であり、yは−1ないし1の数である。) - DRAM素子であることを特徴とする請求項21に記載の電子素子。
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