WO2015174153A1 - コバルト化合物、薄膜形成用原料及び薄膜の製造方法 - Google Patents
コバルト化合物、薄膜形成用原料及び薄膜の製造方法 Download PDFInfo
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- WO2015174153A1 WO2015174153A1 PCT/JP2015/060131 JP2015060131W WO2015174153A1 WO 2015174153 A1 WO2015174153 A1 WO 2015174153A1 JP 2015060131 W JP2015060131 W JP 2015060131W WO 2015174153 A1 WO2015174153 A1 WO 2015174153A1
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- WO
- WIPO (PCT)
- Prior art keywords
- thin film
- cobalt
- raw material
- cobalt compound
- forming
- Prior art date
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- 239000010409 thin film Substances 0.000 title claims abstract description 136
- 150000001869 cobalt compounds Chemical class 0.000 title claims abstract description 83
- 239000002994 raw material Substances 0.000 title claims abstract description 63
- 238000004519 manufacturing process Methods 0.000 title description 27
- 125000004432 carbon atom Chemical group C* 0.000 claims abstract description 25
- 125000000217 alkyl group Chemical group 0.000 claims abstract description 23
- 239000000758 substrate Substances 0.000 claims description 17
- 230000008016 vaporization Effects 0.000 claims description 12
- 239000007788 liquid Substances 0.000 abstract description 26
- 238000002844 melting Methods 0.000 abstract description 17
- 230000008018 melting Effects 0.000 abstract description 17
- 238000000034 method Methods 0.000 description 74
- -1 alkoxide compound Chemical class 0.000 description 56
- 239000002243 precursor Substances 0.000 description 40
- 150000001875 compounds Chemical class 0.000 description 33
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 29
- 239000010408 film Substances 0.000 description 29
- 229910052719 titanium Inorganic materials 0.000 description 29
- 239000010936 titanium Substances 0.000 description 29
- 239000007789 gas Substances 0.000 description 28
- 229910017052 cobalt Inorganic materials 0.000 description 26
- 239000010941 cobalt Substances 0.000 description 26
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 25
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 24
- 238000005755 formation reaction Methods 0.000 description 23
- 239000012808 vapor phase Substances 0.000 description 23
- 230000015572 biosynthetic process Effects 0.000 description 22
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 21
- 229910052751 metal Inorganic materials 0.000 description 19
- 239000002184 metal Substances 0.000 description 18
- 229910052757 nitrogen Inorganic materials 0.000 description 17
- 229910052739 hydrogen Inorganic materials 0.000 description 16
- 239000000203 mixture Substances 0.000 description 16
- 230000000052 comparative effect Effects 0.000 description 15
- 239000000047 product Substances 0.000 description 14
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 12
- 238000004458 analytical method Methods 0.000 description 12
- 229910000428 cobalt oxide Inorganic materials 0.000 description 12
- IVMYJDGYRUAWML-UHFFFAOYSA-N cobalt(ii) oxide Chemical compound [Co]=O IVMYJDGYRUAWML-UHFFFAOYSA-N 0.000 description 12
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 12
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 11
- 238000006243 chemical reaction Methods 0.000 description 11
- 239000000460 chlorine Substances 0.000 description 11
- 229910052801 chlorine Inorganic materials 0.000 description 11
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 11
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 10
- 239000003960 organic solvent Substances 0.000 description 10
- 238000000231 atomic layer deposition Methods 0.000 description 9
- ZSWFCLXCOIISFI-UHFFFAOYSA-N cyclopentadiene Chemical class C1C=CC=C1 ZSWFCLXCOIISFI-UHFFFAOYSA-N 0.000 description 9
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 9
- 239000002245 particle Substances 0.000 description 9
- 230000008569 process Effects 0.000 description 9
- 239000002904 solvent Substances 0.000 description 9
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 8
- 238000000151 deposition Methods 0.000 description 8
- 239000003446 ligand Substances 0.000 description 8
- 230000008021 deposition Effects 0.000 description 7
- 238000000921 elemental analysis Methods 0.000 description 7
- 239000012535 impurity Substances 0.000 description 7
- 238000002354 inductively-coupled plasma atomic emission spectroscopy Methods 0.000 description 7
- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 description 7
- 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 7
- 239000013110 organic ligand Substances 0.000 description 7
- 229910052708 sodium Inorganic materials 0.000 description 7
- 239000011734 sodium Substances 0.000 description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 6
- YRKCREAYFQTBPV-UHFFFAOYSA-N acetylacetone Chemical compound CC(=O)CC(C)=O YRKCREAYFQTBPV-UHFFFAOYSA-N 0.000 description 6
- 238000005229 chemical vapour deposition Methods 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 6
- 239000012434 nucleophilic reagent Substances 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- 238000009834 vaporization Methods 0.000 description 6
- PUPZLCDOIYMWBV-UHFFFAOYSA-N (+/-)-1,3-Butanediol Chemical compound CC(O)CCO PUPZLCDOIYMWBV-UHFFFAOYSA-N 0.000 description 5
- 229910021580 Cobalt(II) chloride Inorganic materials 0.000 description 5
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 5
- 239000006227 byproduct Substances 0.000 description 5
- GVPFVAHMJGGAJG-UHFFFAOYSA-L cobalt dichloride Chemical compound [Cl-].[Cl-].[Co+2] GVPFVAHMJGGAJG-UHFFFAOYSA-L 0.000 description 5
- 239000000706 filtrate Substances 0.000 description 5
- 229910052735 hafnium Inorganic materials 0.000 description 5
- VBJZVLUMGGDVMO-UHFFFAOYSA-N hafnium atom Chemical compound [Hf] VBJZVLUMGGDVMO-UHFFFAOYSA-N 0.000 description 5
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- 238000005979 thermal decomposition reaction Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 229910052726 zirconium Inorganic materials 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 4
- 150000001298 alcohols Chemical class 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 238000000354 decomposition reaction Methods 0.000 description 4
- 238000007865 diluting Methods 0.000 description 4
- 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 4
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 4
- 239000007791 liquid phase Substances 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 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 4
- 239000012048 reactive intermediate Substances 0.000 description 4
- 238000002230 thermal chemical vapour deposition Methods 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- WFDIJRYMOXRFFG-UHFFFAOYSA-N Acetic anhydride Chemical compound CC(=O)OC(C)=O WFDIJRYMOXRFFG-UHFFFAOYSA-N 0.000 description 3
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 description 3
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- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- SJRJJKPEHAURKC-UHFFFAOYSA-N N-Methylmorpholine Chemical compound CN1CCOCC1 SJRJJKPEHAURKC-UHFFFAOYSA-N 0.000 description 3
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- 239000007983 Tris buffer Substances 0.000 description 3
- 239000002313 adhesive film Substances 0.000 description 3
- 150000001414 amino alcohols Chemical class 0.000 description 3
- 229910052786 argon Inorganic materials 0.000 description 3
- LEQVBGOJANWCKL-UHFFFAOYSA-N bis(trimethylsilyl)azanide;cobalt(2+) Chemical compound [Co+2].C[Si](C)(C)[N-][Si](C)(C)C.C[Si](C)(C)[N-][Si](C)(C)C LEQVBGOJANWCKL-UHFFFAOYSA-N 0.000 description 3
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- UAOMVDZJSHZZME-UHFFFAOYSA-N diisopropylamine Chemical compound CC(C)NC(C)C UAOMVDZJSHZZME-UHFFFAOYSA-N 0.000 description 3
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- 125000005843 halogen group Chemical group 0.000 description 3
- TXGJTWACJNYNOJ-UHFFFAOYSA-N hexane-2,4-diol Chemical compound CCC(O)CC(C)O TXGJTWACJNYNOJ-UHFFFAOYSA-N 0.000 description 3
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- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 description 2
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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
- C07F15/00—Compounds containing elements of Groups 8, 9, 10 or 18 of the Periodic Table
- C07F15/06—Cobalt compounds
- C07F15/065—Cobalt compounds without a metal-carbon linkage
-
- 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]
- C23C16/45553—Atomic layer deposition [ALD] characterized by the use of precursors specially adapted for ALD
-
- 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
- C07F15/00—Compounds containing elements of Groups 8, 9, 10 or 18 of the Periodic Table
- C07F15/06—Cobalt 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
- C23C16/06—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
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- 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
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- 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
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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
- H01L21/04—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
- H01L21/28506—Deposition of conductive or insulating materials for electrodes conducting electric current from a gas or vapour, e.g. condensation of conductive layers
- H01L21/28512—Deposition of conductive or insulating materials for electrodes conducting electric current from a gas or vapour, e.g. condensation of conductive layers on semiconductor bodies comprising elements of Group IV of the Periodic Table
- H01L21/28556—Deposition of conductive or insulating materials for electrodes conducting electric current from a gas or vapour, e.g. condensation of conductive layers on semiconductor bodies comprising elements of Group IV of the Periodic Table by chemical means, e.g. CVD, LPCVD, PECVD, laser CVD
Definitions
- the present invention relates to a cobalt compound, a raw material for forming a thin film, and a method for producing a thin film, which are used for an electrode film, a resistance film, an adhesive film, a magnetic tape, a carbide tool member, and the like.
- Cobalt-containing thin films are used for electrode films, resistance films, adhesive films, magnetic tapes, carbide tool members, and the like.
- the method for producing this thin film includes flame deposition method; sputtering method; ion plating method; MOD method such as coating pyrolysis method and sol-gel method (Metal-Organic-Decomposition method); ALD method (Atomic Layer Decomposition: There are vapor phase thin film formation methods such as atomic layer deposition method) and CVD method (Chemical Vapor Decomposition). Among them, the vapor-phase thin film formation method has many advantages such as excellent composition controllability and step coverage, suitable for mass production, and capable of hybrid integration. Is the law.
- a cobalt compound having an organic ligand is used as a precursor for supplying cobalt atoms to the thin film, which is contained in the thin film forming raw material.
- Patent Documents 1 and 2 report a cobalt compound having a tertiary aminoalkoxide as a ligand.
- Patent Document 3 reports a cobalt compound having a primary aminoalkoxide as a ligand.
- the precursor used as a thin film forming raw material has a low melting point and can be transported in a liquid state, and can be decomposed at a low temperature.
- the vapor pressure is required to be large and easy to vaporize.
- the cobalt compounds of Patent Documents 1 to 3 do not sufficiently satisfy these requirements.
- the present invention has been made in order to solve the above problems, and has a low melting point, can be transported in a liquid state, can be decomposed at a low temperature, and has a high vapor pressure and is easily vaporized. It aims at providing the raw material for thin film formation using the same.
- an object of this invention is to provide the manufacturing method of the thin film which can manufacture a good quality cobalt containing thin film with sufficient productivity.
- the present invention provides the following general formula (I):
- this invention is a raw material for thin film formation containing said cobalt compound. Furthermore, the present invention provides a step of obtaining a vapor containing a cobalt compound by vaporizing the raw material for forming a thin film, and bringing the vapor into contact with a substrate to decompose and / or chemically react the cobalt compound. And a step of forming a thin film on the substrate.
- the present invention it is possible to provide a cobalt compound that can be transported in a liquid state with a low melting point, can be decomposed at a low temperature, has a high vapor pressure, and is easily vaporized, and a raw material for forming a thin film using the same. Moreover, according to this invention, the manufacturing method of the thin film which can manufacture a good quality cobalt containing thin film with sufficient productivity can be provided.
- the cobalt compound of the present invention is represented by the following general formula (I).
- R 1 to R 3 each independently represents a linear or branched alkyl group having 1 to 5 carbon atoms.
- the linear or branched alkyl group having 1 to 5 carbon atoms represented by R 1 to R 3 is not particularly limited, and examples thereof include a methyl group, an ethyl group, a propyl group, an isopropyl group, a butyl group, and an isobutyl group. Secondary butyl group, tertiary butyl group, pentyl group, amyl group, isoamyl group and the like.
- the cobalt compound represented by the general formula (I) may have an optically active site.
- R-form or S-form or a mixture of R-form and S-form in any ratio.
- the cobalt compound is a mixture of an R form and an S form, it is preferable to use a racemate from the viewpoint of manufacturing cost.
- a cobalt compound having the structure as described above can be transported in a liquid state with a low melting point, can be decomposed at a low temperature, and has a high vapor pressure and can be easily vaporized.
- the cobalt compound may form a ring structure in which a nitrogen atom in the ligand is coordinated to a cobalt atom.
- the cobalt compound represented by the said general formula (I) is the concept containing the cobalt compound represented by the following general formula (II).
- R 1 to R 3 each independently represents a linear or branched alkyl group having 1 to 5 carbon atoms.
- the cobalt compound has a low melting point even in a liquid state or a solid state at room temperature and normal pressure, and can be decomposed at a low temperature.
- R 1 is a methyl group or an ethyl group
- a cobalt compound is a straight-chain or branched-chain alkyl group of R 2 and R 3 are C 1-5 each independently
- R 1 I is an isopropyl group, an isobutyl group, a secondary butyl group or a tertiary butyl group
- R 2 and R 3 are each independently a linear or branched alkyl group having 1 to 5 carbon atoms
- R 2 and cobalt compounds sum of carbon atoms of R 3 is 3 or more, has a characteristic that is particularly low melting point.
- R 1 is a methyl group, an ethyl group, an isopropyl group, an isobutyl group or a secondary butyl group
- R 2 and R 3 are each independently a straight chain having 1 to 3 carbon atoms or A cobalt compound which is a branched alkyl group and the sum of carbon atoms of R 2 and R 3 is 3 or 4
- R 1 is a tertiary butyl group
- R 2 and R 3 are each independently carbon
- a cobalt compound which is a linear or branched alkyl group of 1 to 4 and the sum of the carbon atoms of R 2 and R 3 is 4 or 5 has a particularly low melting point and is more easily decomposed at a low temperature.
- the cobalt compound as a group has a characteristic that it is more easily decomposed at a low temperature.
- the cobalt compound when a film formation method by the MOD method is used, the cobalt compound preferably has excellent properties such as solubility in a solvent to be used, but if it is a cobalt compound having the above structure, It also has such characteristics.
- a cobalt compound particularly suitable for the MOD method can be easily obtained by appropriately selecting R 1 to R 3 in the general formula (I) according to the type of solvent used, the thin film formation reaction, and the like.
- cobalt compound of the present invention examples include the following compound No. 1-No. 30.
- the cobalt compound of the present invention is not limited by the following exemplary compounds.
- “Me” represents a methyl group
- “Et” represents an ethyl group
- “iPr” represents an isopropyl group
- “iBu” represents an isobutyl group
- “sBu” represents secondary butyl.
- tBu represents a tertiary butyl group.
- the method for producing the cobalt compound of the present invention is not particularly limited, and can be produced by applying a known reaction.
- the cobalt compound of the present invention can be produced by applying a well-known method for synthesizing an alkoxide compound using an amino alcohol.
- an inorganic salt such as cobalt halide, nitrate, or a hydrate thereof, and an amino alcohol compound that gives a predetermined ligand are mixed with sodium, sodium hydride, sodium amide, sodium hydroxide, sodium methylate, ammonia.
- a method of reacting in the presence of a base such as an amine; inorganic salts such as cobalt halides and nitrates or hydrates thereof, and sodium alkoxides, lithium alkoxides, potassium alkoxides and the like of alcohol compounds that give a predetermined ligand A method of reacting with an alkali metal alkoxide; a method of reacting an alkoxide compound of a low molecular alcohol such as cobalt methoxide, ethoxide, isopropoxide, butoxide and the like with an alcohol compound giving a predetermined ligand; cobalt halide , Glass A method of reacting an inorganic salt such as a salt with a derivative that gives a reactive intermediate to obtain a reactive intermediate and then reacting the reactive intermediate with an alcohol compound that gives a predetermined ligand, etc. Can be mentioned.
- the reactive intermediate include amide compounds of cobalt such as bis (dialkylamino) cobalt and bis (bis
- the cobalt compound having the above-described characteristics can be transported in a liquid state with a low melting point, can be decomposed at a low temperature, and has a high vapor pressure and is easily vaporized. It is suitable as a thin film forming raw material for supplying cobalt to the thin film formed by the forming method.
- the raw material for forming a thin film of the present invention contains the cobalt compound of the present invention represented by the above general formula (I) as a precursor.
- the components of the thin film forming raw material of the present invention vary depending on the type of thin film to be produced.
- the thin film forming raw material of the present invention is represented by the above general formula (I). Only the cobalt compound represented is contained as a precursor and does not contain metal compounds and metalloid compounds other than cobalt compounds.
- the raw material for forming a thin film of the present invention is other than cobalt in addition to the cobalt compound represented by the general formula (I). And / or a compound containing a metalloid (hereinafter referred to as “another precursor”).
- the content of the other precursor is preferably 0.01 to 10 mol with respect to 1 mol of the cobalt compound represented by the general formula (I). Mol, more preferably 0.1 to 5 mol.
- the raw material for thin film formation of this invention may further contain the organic solvent and / or a nucleophilic reagent so that it may mention later.
- the raw material for forming a thin film of the present invention is used in this forming method because the physical properties of the cobalt compound of the present invention, which is a precursor, are suitable for a vapor phase thin film forming method, particularly a CVD method or an ALD method. It is particularly useful as a raw material (hereinafter, referred to as “gas phase thin film forming raw material”).
- the form is appropriately selected according to the method such as the transport and supply method of the vapor phase thin film forming method used.
- the vapor phase thin film forming raw material is vaporized by heating and / or depressurizing in the raw material container, and the base is installed together with a carrier gas such as argon, nitrogen or helium used as necessary.
- a gas transport method for supplying the gas into the film forming chamber; the vapor phase thin film forming raw material is transported to the vaporization chamber in a liquid state, and vaporized by heating and / or decompressing in the vaporization chamber, and the substrate is installed.
- a vapor phase thin film forming raw material that can be vaporized by heating and / or decompressing is used.
- a vapor phase thin film forming raw material that is in a liquid state under normal temperature and normal pressure is used. Therefore, in the case of the liquid transport method, if the cobalt compound is in a liquid state at room temperature and normal pressure, the liquid cobalt compound can be used as a raw material for forming a vapor phase thin film, but the cobalt compound is in a solid state at room temperature and normal pressure. If there is, a cobalt compound dissolved in an organic solvent is used as a raw material for forming a vapor phase thin film.
- a method of individually vaporizing and supplying each component (hereinafter referred to as “single source method”) and a mixed raw material in which each component is mixed in advance with a desired composition are used.
- a vaporization and supply method (hereinafter referred to as “cocktail sauce method”).
- cocktail sauce method a mixture of the cobalt compound of the present invention and another precursor, or a mixed solution obtained by adding an organic solvent to these mixtures is used as a raw material for forming a vapor phase thin film.
- the organic solvent used in the raw material for forming a thin film of the present invention is not particularly limited, and a general organic solvent known in the technical field can be used.
- organic solvents include acetates such as ethyl acetate, butyl acetate and methoxyethyl acetate; ethers such as tetrahydrofuran, tetrahydropyran, ethylene glycol dimethyl ether, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, dibutyl ether and dioxane; Ketones, ketones such as methyl isobutyl ketone, ethyl butyl ketone, dipropyl ketone, diisobutyl ketone, methyl amyl ketone, cyclohexanone, methylcyclohexanone; hexane, cyclohexane, methylcyclohexane, dimethylcyclohexane, ethylcycl
- the total amount of the cobalt compound of the present invention and other precursors in the organic solvent is preferably 0.01 to 2.0 mol / liter, more preferably 0. .05 to 1.0 mol / liter.
- precursors used for the thin film forming raw material of the present invention are not particularly limited, and general precursors well known in the technical field can be used.
- examples of other precursors include one or more organic coordination compounds such as alcohol compounds, glycol compounds, ⁇ -diketone compounds, cyclopentadiene compounds, organic amine compounds, ketoimine compounds, silicon and metals (provided that And compounds with the exception of cobalt).
- the metal species is not particularly limited, for example, magnesium, calcium, strontium, barium, radium, scandium, yttrium, titanium, zirconium, hafnium, vanadium, niobium, tantalum, chromium, molybdenum, tungsten, manganese, iron, osmium, Ruthenium, rhodium, iridium, nickel, palladium, platinum, copper, silver, gold, zinc, cadmium, aluminum, gallium, indium, germanium, tin, lead, antimony, bismuth, lanthanum, cerium, praseodymium, neodymium, promethium, samarium, Examples include europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, and ytterbium.
- alcohol compounds that give other precursor organic ligands include, but are not limited to, methanol, ethanol, propanol, isopropyl alcohol, butanol, secondary butyl alcohol, isobutyl alcohol, tertiary butyl alcohol, pentyl alcohol.
- Alkyl alcohols such as isopentyl alcohol and tertiary 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- Meto Ether alcohols such as (ciethoxy) -1,1-dimethylethanol, 2-propoxy-1,1-diethylethanol, 2-s-butoxy-1,1-diethylethanol, 3-methoxy-1,1-dimethylpropanol; 1-dimethylamino-2-propanol, 1-ethylmethylamino-2-propanol, 1-diethylamino-2-propanol, 1-dimethylamino-2-methylamino-2-methyl-2-propanol, 1-
- glycol compounds that give other precursor organic ligands include, but are not limited to, for example, 1,2-ethanediol, 1,2-propanediol, 1,3-propanediol, 2,4-hexanediol, 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.
- the ⁇ -diketone compound that gives other precursor organic ligands is not particularly limited, and examples thereof include acetylacetone, hexane-2,4-dione, 5-methylhexane-2,4-dione, and heptane-2,4.
- Alkyl substituted ⁇ -diketones such as -dione, 2-methylheptane-3,5-dione, 2,6-dimethylheptane-3,5-dione; 1,1,1-trifluoropentane-2,4-dione 1,1,1-trifluoro-5,5-dimethylhexane-2,4-dione, 1,1,1,5,5,5-hexafluoropentane-2,4-dione, 1,3-dione Fluorine-substituted alkyl ⁇ -diketones such as perfluorohexylpropane-1,3-dione; 1,1,5,5-tetramethyl-1-methoxyhexane-2,4-dione, 2,2,6,6- Ether-substituted ⁇ -diketones such as tramethyl-1-methoxyheptane-3,5-dione, 2,2,6,6-tetramethyl-1- (2-methoxyethoxy
- examples include cyclopentadiene, isobutylcyclopentadiene, tertiary butylcyclopentadiene, dimethylcyclopentadiene, and tetramethylcyclopentadiene.
- examples include amine, diethylamine, dipropylamine, diisopropylamine, ethylmethylamine, propylmethylamine, isopropylmethylamine, ethylenediamine, N, N-dimethylethylenediamine, and the like.
- the ketimine compound that gives the organic ligand of another precursor is not particularly limited, and examples thereof include a reaction product of the above-mentioned ⁇ -diketone compound and an organic amine compound.
- ketoimine compounds obtained by reacting acetylacetone with N, N-dimethylethylenediamine in the presence of hydrogen chloride can be used.
- the other precursors have similar thermal and / or oxidative decomposition behavior to the cobalt compound of the present invention.
- the other precursors when using the cocktail sauce method, it is preferable that the other precursors have similar thermal and / or oxidative decomposition behavior to the cobalt compound of the present invention and do not undergo alteration due to chemical reaction during mixing.
- precursors having titanium, zirconium or hafnium as a metal species are represented by the following general formulas (III-1) to (III-5).
- M 1 represents titanium, zirconium or hafnium, and R a and R b may each independently be substituted with a halogen atom
- R a and R b may each independently be substituted with a halogen atom
- R c represents an alkyl group having 1 to 8 carbon atoms
- R d represents an alkylene group having 2 to 18 carbon atoms which may be branched.
- R e and R f each independently represents a hydrogen atom or an alkyl group having 1 to 3 carbon atoms
- R g , R h , R k and R j each independently represent a hydrogen atom or 1 to 3 carbon atoms.
- 4 represents an alkyl group
- p represents an integer of 0 to 4
- q represents 0 or 2
- r represents an integer of 0 to 3
- s represents an integer of 0 to 4
- t
- those having 1 to 20 carbon atoms which may be substituted with a halogen atom represented by R a and R b and may contain an oxygen atom in the chain examples include methyl, ethyl, propyl, isopropyl, butyl, secondary butyl, tertiary butyl, isobutyl, amyl, isoamyl, secondary amyl, tertiary amyl, hexyl, cyclohexyl, 1-methylcyclohexyl, Heptyl, 3-heptyl, isoheptyl, tertiary heptyl, n-octyl, isooctyl, tertiary octyl, 2-ethylhexyl, trifluoromethyl, perfluorohexyl, 2-methoxyethyl, 2-ethoxyethyl,
- Examples of the alkyl group having 1 to 8 carbon atoms represented by R c include methyl, ethyl, propyl, isopropyl, butyl, secondary butyl, tertiary butyl, isobutyl, amyl, isoamyl, secondary amyl, Examples include tertiary amyl, hexyl, 1-ethylpentyl, cyclohexyl, 1-methylcyclohexyl, heptyl, isoheptyl, tertiary heptyl, n-octyl, isooctyl, tertiary octyl, 2-ethylhexyl and the like.
- the alkylene group having 2 to 18 carbon atoms which may be branched and represented by R d is a group given by glycol, and examples of the glycol include 1,2-ethanediol, 1,2- Propanediol, 1,3-propanediol, 1,3-butanediol, 2,4-hexanediol, 2,2-dimethyl-1,3-propanediol, 2,2-diethyl-1,3-propanediol, 2,2-diethyl-1,3-butanediol, 2-ethyl-2-butyl-1,3-propanediol, 2,4-pentanediol, 2-methyl-1,3-propanediol, 1-methyl- Examples include 2,4-pentanediol.
- Examples of the alkyl group having 1 to 3 carbon atoms represented by R e and R f include methyl, ethyl, propyl, and 2-propyl.
- Examples of the alkyl group having 1 to 4 carbon atoms represented by R g , R h , R j and R k include methyl, ethyl, propyl, isopropyl, butyl, secondary butyl, tertiary butyl and isobutyl. Can be mentioned.
- precursors having titanium as a metal species include tetrakis (ethoxy) titanium, tetrakis (2-propoxy) titanium, tetrakis (butoxy) titanium, tetrakis (secondary butoxy) titanium, tetrakis (isobutoxy) titanium, tetrakis ( Tetrakisalkoxytitaniums such as tertiary butoxy) titanium, tetrakis (tertiary amyl) titanium, tetrakis (1-methoxy-2-methyl-2-propoxy) titanium; tetrakis (pentane-2,4-dionato) titanium, Tetrakis ⁇ -diketonatotitaniums such as (2,6-dimethylheptane-3,5-dionato) titanium, tetrakis (2,2,6,6-tetramethylheptane-3,5-dionato) titanium; bis ( Toxi) bis (pentane-2,4-
- precursors having rare earth elements as metal species are represented by the following general formulas (IV-1) to (IV-3).
- M 2 represents a rare earth atom
- R a and R b may each independently be substituted with a halogen atom
- an oxygen atom in the chain Represents an alkyl group having 1 to 20 carbon atoms
- R c represents an alkyl group having 1 to 8 carbon atoms
- R e and R f each independently represents a hydrogen atom or an alkyl group having 1 to 3 carbon atoms
- R g and R j each independently represents an alkyl group having 1 to 4 carbon atoms
- p ′ represents an integer of 0 to 3
- r ′ represents an integer of 0 to 2.
- examples of the rare earth atom represented by M 2 include scandium, yttrium, lanthanum, cerium, praseodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium , Erbium, thulium, ytterbium and lutetium.
- examples of the group represented by R a , R b , R c , R e , R f , R g, and R j include the groups exemplified for the precursor having the above-described titanium or the like as a metal species.
- the raw material for forming a thin film of the present invention may contain a nucleophilic reagent as needed to impart the stability of the cobalt compound of the present invention and other precursors.
- the nucleophilic reagent is not particularly limited.
- ethylene glycol ethers such as glyme, diglyme, triglyme and tetraglyme; 18-crown-6, dicyclohexyl-18-crown-6, 24-crown-8, dicyclohexyl Crown ethers such as -24-crown-8 and dibenzo-24-crown-8; ethylenediamine, N, N′-tetramethylethylenediamine, diethylenetriamine, triethylenetetramine, tetraethylenepentamine, pentaethylenehexamine, 1,1, Polyamines such as 4,7,7-pentamethyldiethylenetriamine, 1,1,4,7,10,10-hexamethyltriethylenetetramine and triethoxytriethyleneamine; cyclic
- the raw material for forming a thin film of the present invention contains as little impurities metal elements as possible other than the above components, impurities halogen such as impurity chlorine, and impurities organic.
- the impurity metal element content is preferably 100 ppb or less for each element, more preferably 10 ppb or less, and the total amount is preferably 1 ppm or less, more preferably 100 ppb or less.
- the impurity halogen content is preferably 100 ppm or less, more preferably 10 ppm or less, and still more preferably 1 ppm or less.
- the total amount of impurity organic components is preferably 500 ppm or less, more preferably 50 ppm or less, and still more preferably 10 ppm or less.
- moisture in the raw material for forming a thin film causes generation of particles in the raw material for forming a thin film and generation of particles during formation of the thin film. Therefore, for the precursor, the organic solvent, and the nucleophilic reagent, For reduction, it is better to remove moisture as much as possible before use.
- the moisture content of each of the precursor, the organic solvent, and the nucleophilic reagent is preferably 10 ppm or less, and more preferably 1 ppm or less.
- the thin film forming raw material of the present invention preferably contains no particles as much as possible in order to reduce or prevent particle contamination of the formed thin film.
- the number of particles larger than 0.3 ⁇ m is preferably 100 or less in 1 mL of the 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 the number of particles larger than 0.2 ⁇ m is further preferably 100 or less in 1 mL of the liquid phase.
- the method for producing a thin film of the present invention is performed using the raw material for forming a thin film of the present invention.
- the method for producing the thin film of the present invention performed using the raw material for forming a thin film of the present invention is not particularly limited, and a MOD method such as a coating pyrolysis method or a sol-gel method; a vapor phase thin film formation such as an ALD method or a CVD method.
- the method etc. can be used.
- a vapor phase thin film forming method having many advantages such as excellent composition controllability and step coverage, suitable for mass production, and capable of hybrid integration is preferable.
- the method for producing a thin film of the present invention performed by using a vapor phase thin film forming method includes a step of obtaining a vapor containing a cobalt compound by vaporizing the raw material for forming a thin film of the present invention, and bringing the vapor into contact with a substrate.
- formation of a thin film is generally performed in a film forming chamber in which a substrate is installed.
- the thin film forming raw material may be supplied into the film formation chamber in which the substrate is installed, using the gas transport method, the liquid transport method, the single source method, or the cocktail source method as described above.
- a source gas vaporized raw material for forming a thin film
- a thermal CVD method in which a source gas and a reactive gas are reacted using only heat to form a thin film
- plasma using heat and plasma examples include a CVD method; a photo-CVD method using heat and light; a photo-plasma CVD method using heat, light, and plasma; an ALD method in which the deposition reaction of CVD is divided into elementary processes and deposition is performed stepwise at the molecular level.
- oxidizing gas such as oxygen, ozone, nitrogen dioxide, nitric oxide, water vapor, hydrogen peroxide, formic acid, acetic acid, acetic anhydride; hydrogen etc.
- reducing gas such as oxygen, ozone, nitrogen dioxide, nitric oxide, water vapor, hydrogen peroxide, formic acid, acetic acid, acetic anhydride; hydrogen etc.
- an organic amine compound such as monoalkylamine, dialkylamine, trialkylamine, or alkylenediamine, hydrazine, ammonia, or the like may be used as the reactive gas.
- Reactive gas can be used 1 type or in combination of 2 or more types.
- the film formation conditions in the film formation chamber are not particularly limited, and may be set as appropriate according to the type of apparatus used and raw materials.
- the thin film production apparatus is not particularly limited, and a vapor thin film forming apparatus such as a chemical vapor deposition apparatus well known in the art can be used.
- Examples of thin film manufacturing apparatuses include a vapor phase thin film forming apparatus capable of bubbling and supplying a thin film forming raw material, a vapor phase thin film forming apparatus having a vaporization chamber for vaporizing the thin film forming raw material, and performing plasma treatment.
- Possible vapor-phase thin film forming apparatuses are included. These apparatuses are not limited to a single wafer type apparatus, and can be an apparatus capable of simultaneously processing a large number of sheets using a batch furnace.
- the film formation conditions include reaction temperature (substrate temperature), reaction pressure, deposition rate, and the like.
- the reaction temperature is preferably 100 ° C. or more, more preferably 100 ° C. to 400 ° C., which is the temperature at which the cobalt compound of the present invention sufficiently reacts.
- the reaction pressure is preferably atmospheric pressure to 10 Pa in the case of thermal CVD or photo CVD, and preferably 2000 Pa to 10 Pa in the case of using plasma.
- the deposition rate can be controlled by the raw material supply conditions (vaporization temperature, vaporization pressure), reaction temperature, and reaction pressure. If the deposition rate is too high, the properties of the obtained thin film may be deteriorated, and if it is too low, there may be a problem in productivity. Therefore, the deposition rate is preferably 0.01 to 5000 nm / min, and more preferably 0.1 to 1000 nm / min. In the case of the ALD method, the number of cycles may be controlled so that a desired film thickness is obtained.
- the precursor thin film is formed using the thin film forming raw material of the present invention. Specifically, by vaporizing the raw material for forming a thin film of the present invention, a vapor containing a cobalt compound is obtained, and then the vapor is brought into contact with a substrate to decompose and / or chemically react the cobalt compound. A precursor thin film is formed on the substrate (precursor thin film forming step). At this time, heat may be applied by heating the substrate or heating the deposition chamber.
- the substrate temperature is preferably room temperature to 500 ° C, more preferably 150 to 350 ° C.
- the pressure in the film forming chamber is preferably 1 to 10,000 Pa, and more preferably 10 to 1000 Pa.
- the precursor thin film to be formed is a thin film formed by decomposition and / or reaction of a part of the cobalt compound, and has a composition different from that of the target cobalt oxide thin film.
- unreacted source gas and by-product gas are exhausted from the film forming chamber (exhaust process).
- the evacuation method include a method of purging the film formation chamber with an inert gas such as nitrogen, helium, and argon, a method of evacuating the film formation chamber by reducing the pressure, and a method combining these.
- the degree of pressure reduction is preferably 0.01 to 300 Pa, more preferably 0.01 to 100 Pa.
- a reactive gas is supplied into the film forming chamber, and a cobalt oxide thin film is formed from the precursor thin film by the action of the reactive gas or the reactive gas and heat (cobalt oxide thin film forming step).
- the heating temperature is preferably room temperature to 500 ° C, more preferably 150 to 350 ° C.
- the cobalt compound of the present invention has good reactivity with reactive gases typified by hydrogen, oxygen and ozone, and can efficiently form a cobalt oxide thin film and a cobalt thin film.
- a series of processes including a precursor thin film forming process, an exhaust process, and a cobalt oxide thin film forming process is defined as one cycle, and this cycle is defined as a necessary film. It may be repeated a plurality of times until a thick cobalt oxide thin film is obtained. In this case, it is preferable to perform the next cycle after exhausting unreacted source gas, reactive gas, and by-product gas from the film formation chamber after performing one cycle, in the same manner as the exhaust process.
- energy such as plasma, light, or voltage may be applied.
- the timing of applying energy is not particularly limited, and can be performed, for example, during each step or during each step.
- annealing treatment may be performed in an inert atmosphere, an oxidizing atmosphere, or a reducing atmosphere. Silicidation may be performed.
- a reflow process may be provided when step filling is necessary.
- the temperature in this case is usually 200 to 1000 ° C., preferably 250 to 500 ° C.
- the thin film produced by the method for producing a thin film of the present invention using the raw material for forming a thin film of the present invention can be obtained by appropriately selecting other precursors, reactive gases, production conditions, etc.
- a desired type of thin film such as ceramics or glass can be obtained.
- it is possible to manufacture thin films such as metallic cobalt, cobalt-based oxides, cobalt-based nitrides, and cobalt-based alloys such as Co—Cr, Co—Fe, and Co—Ni.
- Applications of these thin films include resistance films, adhesive films, carbide tools, magnetic films, magnets, and IC lead frames.
- Example 1 Compound No. 7
- a 200 mL four-necked flask was charged with 10.8 g (0.079 mol) of cobalt (II) chloride and 55.1 g of tetrahydrofuran, and stirred at room temperature.
- a solution obtained by diluting 25.6 g (0.167 mol) of sodium alkoxide prepared by using 1- (ethyl (methyl) amino) butan-2-ol with 48.6 g of tetrahydrofuran was cooled under ice cooling. It was dripped. After completion of the dropwise addition, the mixture was stirred at room temperature for 21 hours, and 69.7 g of toluene was added and stirred, followed by filtration.
- the solvent was removed from the obtained filtrate, and the residue was distilled at a bath temperature of 205 ° C., a pressure of 40 Pa, and a tower top temperature of 155 ° C. to obtain a target product (compound No. 7) that was a dark purple viscous liquid.
- the yield was 8.23 g and the yield was 34%.
- Example 2 Compound No. 12
- a 100 mL three-necked flask was charged with 1.13 g (8.27 mmol) of cobalt (II) chloride and 15.3 g of tetrahydrofuran, and stirred at room temperature.
- a solution prepared by diluting 2.90 g (17.3 mmol) of a sodium alkoxide prepared by using 1- (ethyl (methyl) amino) -3-methylbutan-2-ol with 18.0 g of tetrahydrofuran was added to ice. It was dripped under cooling. After completion of the dropwise addition, the mixture was stirred at room temperature for 21 hours and filtered.
- the solvent was removed from the obtained filtrate, and the residue was distilled at a bath temperature of 145 ° C., a pressure of 25 Pa, and a tower top temperature of 107 ° C. to obtain a target product (compound No. 12) which is a dark purple viscous liquid.
- the yield was 0.42 g, and the yield was 14%.
- Example 3 Compound No. 14
- a 100 mL three-necked flask is charged with 1.00 g (2.63 mmol) of bis (bis (trimethylsilyl) amino) cobalt (II) and 10 g of toluene, and 1-diethylamino) -3-methylbutan-2-ol 0 .83 g (5.26 mmol) was added dropwise at room temperature. After completion of dropping, the mixture was stirred at room temperature for 20 hours. The solvent and by-product silazane compound were removed under reduced pressure at a bath temperature of 110 ° C. to obtain the desired product (compound No. 14) as a dark purple viscous liquid. The yield was 0.75 g and the yield was 74%.
- Example 4 Compound No. 17
- a 100 mL three-necked flask was charged with 1.00 g (2.63 mmol) of bis (bis (trimethylsilyl) amino) cobalt (II) and 10 g of toluene, and 1- (ethyl (methyl) amino) -4-methyl was added therein.
- Pentan-2-ol 0.87 g (5.26 mmol) was added dropwise at room temperature. After completion of dropping, the mixture was stirred at room temperature for 20 hours.
- the solvent and the by-product silazane compound were removed under reduced pressure at a bath temperature of 110 ° C. to obtain the desired product (compound No. 17) as a dark purple viscous liquid.
- the yield was 0.80 g and the yield was 81%.
- Example 5 Compound No. 22
- a 200 mL three-necked flask was charged with 3.95 g (30.4 mmol) of cobalt (II) chloride and 29.1 g of tetrahydrofuran, and stirred at room temperature.
- a solution obtained by diluting 10.7 g (59.3 mmol) of sodium alkoxide prepared by using 1- (ethyl (methyl) amino) -3-methylpentan-2-ol with 28.9 g of tetrahydrofuran was added. The solution was added dropwise under ice cooling. After completion of the dropwise addition, the mixture was stirred at room temperature for 18 hours and filtered.
- the solvent was removed from the obtained filtrate, and the residue was distilled at a bath temperature of 165 ° C., a pressure of 65 Pa, and a tower top temperature of 147 ° C. to obtain the desired product (Compound No. 22) as a purple viscous liquid.
- the yield was 1.42 g, and the yield was 13%.
- Example 6 Compound No. 27
- a 100 mL three-necked flask was charged with 2.90 g (0.022 mol) of cobalt (II) chloride and 17.6 g of tetrahydrofuran, and stirred at room temperature.
- 7.97 g (0.044 mol) of sodium alkoxide prepared by using 1- (ethyl (methyl) amino) -3,3-dimethylbutan-2-ol was diluted with 15.6 g of tetrahydrofuran.
- the solution was added dropwise under ice cooling. After completion of the dropwise addition, the mixture was stirred at room temperature for 20 hours and filtered.
- Example 7 Compound No. 29
- a 200 mL three-necked flask was charged with 5.95 g (45.8 mmol) of cobalt (II) chloride and 26.8 g of tetrahydrofuran, and stirred at room temperature.
- a solution obtained by diluting 17.2 g (88.3 mmol) of sodium alkoxide prepared by using 1- (diethylamino) -3,3-dimethylbutan-2-ol with 22.9 g of tetrahydrofuran was ice-cooled. It was dripped under. After completion of the dropwise addition, the mixture was stirred at room temperature for 16 hours and filtered.
- the solvent was removed from the obtained filtrate, and the residue was distilled at a bath temperature of 150 ° C., a pressure of 40 Pa, and a tower top temperature of 115 ° C. to obtain the desired product (Compound No. 29) as a red-violet viscous liquid.
- the yield was 7.59 g, and the yield was 43%.
- Comparative Examples 1 and 2 As Comparative Example 1, the following Comparative Compound No. 1 and Comparative Example 2 as Comparative Example 2 below. 2 were each prepared according to known methods.
- the state (whether it is a solid state or a liquid state) in normal temperature (30 degreeC) is observed visually, and about the thing of a solid state, it is minute.
- the melting point was measured using a melting point measuring device.
- the thermal stability of a cobalt compound was evaluated by measuring the temperature (thermal decomposition generation temperature) which a thermal decomposition generate
- the cobalt compound of Comparative Example 1 had a melting point of 80 ° C.
- the cobalt compound of Comparative Example 2 had a melting point of 100 ° C. or higher
- the cobalt compounds of Examples 1 to 7 All had lower melting points than the cobalt compounds of Comparative Example 1 and Comparative Example 2.
- the cobalt compounds of Examples 1 to 5 and 7 were found to be liquid under normal temperature and pressure conditions. Since the raw material for forming a thin film that is liquid at room temperature and normal pressure or has a low melting point can be easily transported, the cobalt compounds of Examples 1 to 7 can be said to be raw materials for forming a thin film that can improve productivity.
- the cobalt compound of Comparative Example 2 needs to be heated at 300 ° C. for thermal decomposition, whereas the cobalt compounds of Examples 1 to 7 are about 20 to 30% more than the cobalt compound of Comparative Example 2. It was also confirmed that it can be decomposed at a low temperature. Among them, it was found that the cobalt compounds of Examples 2 and 7 can be decomposed at a particularly low temperature of 230 ° C. Further, it can be said that the cobalt compounds of Examples 1 to 7 are raw materials for forming a thin film exhibiting a high vapor pressure because the temperature when the weight of the sample is reduced by 50% is low.
- Example 8 Production of cobalt oxide thin film by thermal CVD method
- a cobalt oxide thin film was formed on a Cu substrate and a SiO 2 substrate by the thermal CVD method in the CVD apparatus shown in FIG. 1 under the following conditions.
- Raw material container temperature 70 ° C
- Raw material container pressure 100 Pa Reaction temperature (substrate temperature): 300 ° C
- Reactive gas None
- Carrier gas Argon gas
- the vaporized raw material for forming a thin film was supplied to the film formation chamber, and was deposited for 8000 seconds at a pressure of 100 Pa in the film formation chamber.
- the film thickness measurement by X-ray reflectivity method and the thin film structure and thin film composition by X-ray photoelectron spectroscopy were confirmed.
- the film thickness obtained per unit time was 0.2 to 1.0 nm / min, and all the obtained thin films were cobalt oxide thin films.
- a cobalt compound having a low melting point which can be transported in a liquid state, can be decomposed at a low temperature, has a high vapor pressure and is easily vaporized, and a thin film formation using the same Raw materials can be provided.
- the manufacturing method of the thin film which can manufacture a good quality cobalt containing thin film with sufficient productivity can be provided.
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Abstract
Description
例えば、特許文献1及び2には、第3級アミノアルコキシドを配位子としたコバルト化合物が報告されている。また、特許文献3には、第1級アミノアルコキシドを配位子としたコバルト化合物が報告されている。
本発明は、上記のような問題を解決するためになされたものであり、融点が低く液体の状態で輸送ができ、低温で分解させることができ、しかも蒸気圧が大きく気化させ易いコバルト化合物及びそれを用いた薄膜形成用原料を提供することを目的とする。
また、本発明は、良質なコバルト含有薄膜を生産性良く製造することができる薄膜の製造方法を提供することを目的とする。
すなわち、本発明は、下記一般式(I):
また、本発明は、上記のコバルト化合物を含有する薄膜形成用原料である。
さらに、本発明は、上記の薄膜形成用原料を気化させることにより、コバルト化合物を含有する蒸気を得る工程と、前記蒸気を基体と接触させることにより、前記コバルト化合物を分解及び/又は化学反応させて前記基体上に薄膜を形成する工程とを含む薄膜の製造方法である。
また、本発明によれば、良質なコバルト含有薄膜を生産性良く製造することができる薄膜の製造方法を提供することができる。
上記のような構造を有するコバルト化合物であれば、融点が低く液体の状態で輸送ができ、低温で分解させることができ、しかも蒸気圧が大きく気化させ易くすることができる。
また、本発明の薄膜形成用原料は、後述するように、有機溶剤及び/又は求核性試薬を更に含有してもよい。
上記の輸送供給方法としては、気相薄膜形成用原料を原料容器中で加熱及び/又は減圧することによって気化させ、必要に応じて用いられるアルゴン、窒素、ヘリウムなどのキャリアガスと共に、基体が設置された成膜チャンバー内へと供給する気体輸送法;気相薄膜形成用原料を液体の状態で気化室まで輸送し、気化室で加熱及び/又は減圧することによって気化させて、基体が設置された成膜チャンバー内へと供給する液体輸送法がある。
また、Rdで表される炭素数2~18の分岐してもよいアルキレン基とは、グリコールにより与えられる基であり、該グリコールとしては、例えば、1,2-エタンジオール、1,2-プロパンジオール、1,3-プロパンジオール、1,3-ブタンジオール、2,4-ヘキサンジオール、2,2-ジメチル-1,3-プロパンジオール、2,2-ジエチル-1,3-プロパンジオール、2,2-ジエチル-1,3-ブタンジオール、2-エチル-2-ブチル-1,3-プロパンジオール、2,4-ペンタンジオール、2-メチル-1,3-プロパンジオール、1-メチル-2,4-ペンタンジオールなどが挙げられる。
また、Rg、Rh、Rj及びRkで表される炭素数1~4のアルキル基としては、メチル、エチル、プロピル、イソプロピル、ブチル、第2級ブチル、第3級ブチル、イソブチルが挙げられる。
また、Ra、Rb、Rc、Re、Rf、Rg及びRjで表される基としては、前記のチタニウムなどを金属種として有するプレカーサで例示した基が挙げられる。
求核性試薬の使用量は、プレカーサ1モルに対して、通常0.1モル~10モル、好ましくは1~4モルの範囲で使用される。
また、薄膜形成用原料中の水分は、薄膜形成用原料中でのパーティクル発生や、薄膜形成中におけるパーティクル発生の原因となるので、プレカーサ、有機溶剤及び求核性試薬については、それぞれの水分の低減のために、使用の際に予め出来る限り水分を取り除いた方がよい。プレカーサ、有機溶剤及び求核性試薬それぞれの水分量は、10ppm以下が好ましく、1ppm以下が更に好ましい。
反応温度としては、本発明のコバルト化合物などが充分に反応する温度である100℃以上が好ましく、100℃~400℃がより好ましい。
反応圧力としては、熱CVDや光CVDの場合、大気圧~10Paが好ましく、プラズマを使用する場合は、2000Pa~10Paが好ましい。
堆積速度は、原料の供給条件(気化温度、気化圧力)、反応温度、反応圧力によって制御することができる。堆積速度は、大きすぎると、得られる薄膜の特性が悪化する場合があり、小さすぎると、生産性に問題を生じる場合がある。そのため、堆積速度は、0.01~5000nm/分が好ましく、0.1~1000nm/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制御すればよい。
200mLの4つ口フラスコに、塩化コバルト(II)10.8g(0.079mol)、及びテトラヒドロフラン55.1gを仕込み、室温下で撹拌した。その中に、1-(エチル(メチル)アミノ)ブタン-2-オールを用いて調製して得たナトリウムアルコキシド25.6g(0.167mol)をテトラヒドロフラン48.6gで希釈した溶液を氷冷下で滴下した。滴下終了後、混合液を室温下で21時間撹拌し、トルエン69.7gを加えて撹拌した後、ろ過を行った。得られたろ液から溶媒を除去し、残渣をバス温度205℃、圧力40Pa、塔頂温度155℃で蒸留して、暗紫色粘性液体である目的物(化合物No.7)を得た。収量は8.23g、収率は34%であった。
コバルト:19.1質量%(理論値18.5質量%)
C:51.3質量%、H:10.3質量%、N:8.5質量%(理論値C:52.7質量%、H:10.1質量%、N:8.8質量%)
塩素:10ppm未満
100mLの3つ口フラスコに、塩化コバルト(II)1.13g(8.27mmol)、及びテトラヒドロフラン15.3gを仕込み、室温下で撹拌した。その中に、1-(エチル(メチル)アミノ)-3-メチルブタン-2-オールを用いて調製して得たナトリウムアルコキシド2.90g(17.3mmol)をテトラヒドロフラン18.0gで希釈した溶液を氷冷下で滴下した。滴下終了後、混合液を室温下で21時間撹拌し、ろ過を行った。得られたろ液から溶媒を除去し、残渣をバス温度145℃、圧力25Pa、塔頂温度107℃で蒸留して、濃紫色粘性液体である目的物(化合物No.12)を得た。収量は0.42g、収率は14%であった。
コバルト:17.4質量%(理論値16.7質量%)
C:55.9質量%、H:10.9質量%、N:7.8質量%(理論値C:55.3質量%、H:10.4質量%、N:8.1質量%)
塩素:10ppm未満
100mLの3つ口フラスコに、ビス(ビス(トリメチルシリル)アミノ)コバルト(II)1.00g(2.63mmol)及びトルエン10gを仕込み、その中に1-ジエチルアミノ)-3-メチルブタン-2-オール0.83g(5.26mmol)を室温下で滴下した。滴下終了後、混合液を室温下で20時間撹拌した。バス温度110℃、減圧下で溶媒及び副生成物であるシラザン化合物を除去して濃紫色粘性液体である目的物(化合物No.14)を得た。収量は0.75g、収率は74%であった。
コバルト:16.2質量%(理論値15.7質量%)
C:57.5質量%、H:10.4質量%、N:7.9質量%(理論値C:57.6質量%、H:10.7質量%、N:7.5質量%)
100mLの3つ口フラスコに、ビス(ビス(トリメチルシリル)アミノ)コバルト(II)1.00g(2.63mmol)及びトルエン10gを仕込み、その中に1-(エチル(メチル)アミノ)-4-メチルペンタン-2-オール0.87g(5.26mmol)を室温下で滴下した。滴下終了後、混合液を室温下で20時間撹拌した。バス温度110℃、減圧下で溶媒及び副生成物であるシラザン化合物を除去して濃紫色粘性液体である目的物(化合物No.17)を得た。収量は0.80g、収率は81%であった。
コバルト:15.4質量%(理論値15.7質量%)
C:57.9質量%、H:10.6質量%、N:7.1質量%(理論値C:57.6質量%、H:10.7質量%、N:7.5質量%)
200mLの3つ口フラスコに、塩化コバルト(II)3.95g(30.4mmol)、及びテトラヒドロフラン29.1gを仕込み、室温下で撹拌した。その中に、1-(エチル(メチル)アミノ)-3-メチルペンタン-2-オールを用いて調製して得たナトリウムアルコキシド10.7g(59.3mmol)をテトラヒドロフラン28.9gで希釈した溶液を氷冷下で滴下した。滴下終了後、混合液を室温下で18時間撹拌し、ろ過を行った。得られたろ液から溶媒を除去し、残渣をバス温度165℃、圧力65Pa、塔頂温度147℃で蒸留して、紫色粘性液体である目的物(化合物No.22)を得た。収量は1.42g、収率は13%であった。
コバルト:15.2質量%(理論値15.7質量%)
C:58.0質量%、H:10.8質量%、N:7.6質量%(理論値C:57.6質量%、H:10.7質量%、N:7.5質量%)
塩素:10ppm未満
100mLの3つ口フラスコに、塩化コバルト(II)2.90g(0.022mol)、及びテトラヒドロフラン17.6gを仕込み、室温下で撹拌した。その中に、1-(エチル(メチル)アミノ)-3,3-ジメチルブタン-2-オールを用いて調製して得たナトリウムアルコキシド7.97g(0.044mol)をテトラヒドロフラン15.6gで希釈した溶液を氷冷下で滴下した。滴下終了後、混合液を室温下で20時間撹拌し、ろ過を行った。得られたろ液から溶媒を除去し、残渣をバス温度135℃、圧力17Paの条件下で蒸留して、暗赤色固体(融点69℃)である目的物(化合物No.27)を得た。収量は3.39g、収率は41%であった。
コバルト:15.9質量%(理論値15.7質量%)
C:57.9質量%、H:10.4質量%、N:7.6質量%(理論値C:57.6質量%、H:10.7質量%、N:7.5質量%)
塩素:10ppm未満
200mLの3つ口フラスコに、塩化コバルト(II)5.95g(45.8mmol)、及びテトラヒドロフラン26.8gを仕込み、室温下で撹拌した。その中に、1-(ジエチルアミノ)-3,3-ジメチルブタン-2-オールを用いて調製して得たナトリウムアルコキシド17.2g(88.3mmol)をテトラヒドロフラン22.9gで希釈した溶液を氷冷下で滴下した。滴下終了後、混合液を室温下で16時間撹拌し、ろ過を行った。得られたろ液から溶媒を除去し、残渣をバス温度150℃、圧力40Pa、塔頂温度115℃で蒸留して、赤紫色粘性液体である目的物(化合物No.29)を得た。収量は7.59g、収率は43%であった。
コバルト:14.4質量%(理論値14.6質量%)
C:59.7質量%、H:10.7質量%、N:7.3質量%(理論値C:59.5質量%、H:11.0質量%、N:6.9質量%)
塩素:10ppm未満
比較例1として下記の比較化合物No.1、比較例2として下記の比較化合物No.2を、周知の方法に準じてそれぞれ製造した。
また、上記の実施例及び比較例で得られたコバルト化合物について、DSC測定装置を用いて熱分解が発生する温度(熱分解発生温度)を測定することにより、コバルト化合物の熱安定性を評価した。
<常圧TG-DTAの測定条件>
Ar流量:100mL/分
昇温速度:10℃/分
サンプル量:約10mg
<減圧TG-DTAの測定条件>
圧力:10Torr
Ar流量:50mL/分
昇温速度:10℃/分
サンプル量:約10mg
上記の評価結果を表1に示す。
また、比較例2のコバルト化合物は、熱分解させるために300℃の加熱が必要であるのに対し、実施例1~7のコバルト化合物は、比較例2のコバルト化合物よりも20~30%程度も低い温度で分解させることができることを確認した。その中でも、実施例2及び7のコバルト化合物は、230℃という特に低い温度で分解させることができることがわかった。
さらに、実施例1~7のコバルト化合物は、サンプルの重量が50%減少した際の温度が低いため、高い蒸気圧を示す薄膜形成用原料であると言える。
実施例1~7のコバルト化合物を薄膜形成用原料として用い、図1に示すCVD装置において、熱CVD法により、下記の条件にてCu基板及びSiO2基板上に酸化コバルト薄膜を形成した。
<条件>
原料容器温度:70℃
原料容器内圧力:100Pa
反応温度(基体温度):300℃
反応性ガス:なし
キャリアガス:アルゴンガス
<工程>
気化させた薄膜形成用原料の蒸気を成膜チャンバーに供給し、成膜チャンバー内の圧力100Paで8000秒間堆積させた。
また、本発明によれば、良質なコバルト含有薄膜を生産性良く製造することができる薄膜の製造方法を提供することができる。
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US15/306,807 US20170050998A1 (en) | 2014-05-14 | 2015-03-31 | Cobalt compound, thin film-forming raw material, and method for producing thin film |
EP15792769.0A EP3144313A4 (en) | 2014-05-14 | 2015-03-31 | Cobalt compound, raw material for forming thin film, and method for producing thin film |
KR1020167030824A KR102376087B1 (ko) | 2014-05-14 | 2015-03-31 | 코발트 화합물, 박막 형성용 원료 및 박막의 제조 방법 |
IL248518A IL248518A0 (en) | 2014-05-14 | 2016-10-26 | Cobalt compound, raw material forming a thin layer and method for producing a thin layer |
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JP2014100607A JP6249875B2 (ja) | 2014-05-14 | 2014-05-14 | コバルト化合物、薄膜形成用原料及び薄膜の製造方法 |
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JP (1) | JP6249875B2 (ja) |
KR (1) | KR102376087B1 (ja) |
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TWI848976B (zh) * | 2018-10-04 | 2024-07-21 | 日商Adeka股份有限公司 | 原子層堆積法用薄膜形成用原料、薄膜形成用原料、薄膜之製造方法及化合物 |
IL283981B1 (en) * | 2018-12-17 | 2024-10-01 | Adeka Corp | Raw material for creating a thin layer using an atomic layer deposition method, a method for the production of a thin layer and an alkoxide compound |
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JP2013216614A (ja) * | 2012-04-09 | 2013-10-24 | Adeka Corp | コバルト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 |
US20130330473A1 (en) * | 2012-06-11 | 2013-12-12 | Wayne State University | Atomic Layer Deposition of Transition Metal Thin Films Using Boranes as the Reducing Agent |
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 |
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KR100593265B1 (ko) | 2004-09-02 | 2006-06-26 | 한국기계연구원 | 플라즈마 아크방전을 이용한 나노분말 제조공정 |
JP4632765B2 (ja) * | 2004-10-21 | 2011-02-16 | 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 |
JP4795006B2 (ja) | 2005-11-29 | 2011-10-19 | アイシン・エィ・ダブリュ株式会社 | ブレーキ用油圧サーボ、及びそれを備えた自動変速機 |
KR100675983B1 (ko) * | 2006-03-06 | 2007-01-30 | 한국화학연구원 | 신규의 코발트 아미노알콕사이드 화합물 및 그 제조 방법 |
US8871628B2 (en) * | 2009-01-21 | 2014-10-28 | Veeco Ald Inc. | Electrode structure, device comprising the same and method for forming electrode structure |
JP5690684B2 (ja) * | 2011-08-02 | 2015-03-25 | 株式会社Adeka | アルコキシド化合物 |
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JP2013216614A (ja) * | 2012-04-09 | 2013-10-24 | Adeka Corp | コバルト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 |
US20130330473A1 (en) * | 2012-06-11 | 2013-12-12 | Wayne State University | Atomic Layer Deposition of Transition Metal Thin Films Using Boranes as the Reducing Agent |
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 |
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TWI652275B (zh) | 2019-03-01 |
IL248518A0 (en) | 2016-12-29 |
JP2015218116A (ja) | 2015-12-07 |
TW201604200A (zh) | 2016-02-01 |
KR102376087B1 (ko) | 2022-03-17 |
KR20170007277A (ko) | 2017-01-18 |
US20170050998A1 (en) | 2017-02-23 |
EP3144313A4 (en) | 2017-12-06 |
JP6249875B2 (ja) | 2017-12-20 |
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