WO2016021385A1 - アルコキシド化合物、薄膜形成用原料、薄膜の形成方法及びアルコール化合物 - Google Patents
アルコキシド化合物、薄膜形成用原料、薄膜の形成方法及びアルコール化合物 Download PDFInfo
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- WO2016021385A1 WO2016021385A1 PCT/JP2015/070385 JP2015070385W WO2016021385A1 WO 2016021385 A1 WO2016021385 A1 WO 2016021385A1 JP 2015070385 W JP2015070385 W JP 2015070385W WO 2016021385 A1 WO2016021385 A1 WO 2016021385A1
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- thin film
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- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 3
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- 125000002097 pentamethylcyclopentadienyl group Chemical group 0.000 description 3
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- OGHBATFHNDZKSO-UHFFFAOYSA-N propan-2-olate Chemical compound CC(C)[O-] OGHBATFHNDZKSO-UHFFFAOYSA-N 0.000 description 1
- 235000013772 propylene glycol Nutrition 0.000 description 1
- ASRAWSBMDXVNLX-UHFFFAOYSA-N pyrazolynate Chemical compound C=1C=C(Cl)C=C(Cl)C=1C(=O)C=1C(C)=NN(C)C=1OS(=O)(=O)C1=CC=C(C)C=C1 ASRAWSBMDXVNLX-UHFFFAOYSA-N 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 229910052707 ruthenium Inorganic materials 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- BHRZNVHARXXAHW-UHFFFAOYSA-N sec-butylamine Chemical compound CCC(C)N BHRZNVHARXXAHW-UHFFFAOYSA-N 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 125000004469 siloxy group Chemical group [SiH3]O* 0.000 description 1
- ODZPKZBBUMBTMG-UHFFFAOYSA-N sodium amide Chemical compound [NH2-].[Na+] ODZPKZBBUMBTMG-UHFFFAOYSA-N 0.000 description 1
- 239000012312 sodium hydride Substances 0.000 description 1
- 229910000104 sodium hydride Inorganic materials 0.000 description 1
- 238000003980 solgel method Methods 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000001308 synthesis method Methods 0.000 description 1
- MZLGASXMSKOWSE-UHFFFAOYSA-N tantalum nitride Chemical compound [Ta]#N MZLGASXMSKOWSE-UHFFFAOYSA-N 0.000 description 1
- FAGUFWYHJQFNRV-UHFFFAOYSA-N tetraethylenepentamine Chemical compound NCCNCCNCCNCCN FAGUFWYHJQFNRV-UHFFFAOYSA-N 0.000 description 1
- ZUHZGEOKBKGPSW-UHFFFAOYSA-N tetraglyme Chemical compound COCCOCCOCCOCCOC ZUHZGEOKBKGPSW-UHFFFAOYSA-N 0.000 description 1
- 238000003852 thin film production method Methods 0.000 description 1
- 150000003609 titanium compounds Chemical class 0.000 description 1
- JMXKSZRRTHPKDL-UHFFFAOYSA-N titanium ethoxide Chemical compound [Ti+4].CC[O-].CC[O-].CC[O-].CC[O-] JMXKSZRRTHPKDL-UHFFFAOYSA-N 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- VXUYXOFXAQZZMF-UHFFFAOYSA-N titanium(IV) isopropoxide Chemical compound CC(C)O[Ti](OC(C)C)(OC(C)C)OC(C)C VXUYXOFXAQZZMF-UHFFFAOYSA-N 0.000 description 1
- 125000005270 trialkylamine group Chemical group 0.000 description 1
- 125000002023 trifluoromethyl group Chemical group FC(F)(F)* 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
Images
Classifications
-
- 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
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F1/00—Compounds containing elements of Groups 1 or 11 of the Periodic Table
- C07F1/08—Copper compounds
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C251/00—Compounds containing nitrogen atoms doubly-bound to a carbon skeleton
- C07C251/02—Compounds containing nitrogen atoms doubly-bound to a carbon skeleton containing imino groups
- C07C251/04—Compounds containing nitrogen atoms doubly-bound to a carbon skeleton containing imino groups having carbon atoms of imino groups bound to hydrogen atoms or to acyclic carbon atoms
- C07C251/06—Compounds containing nitrogen atoms doubly-bound to a carbon skeleton containing imino groups having carbon atoms of imino groups bound to hydrogen atoms or to acyclic carbon atoms to carbon atoms of a saturated carbon skeleton
- C07C251/08—Compounds containing nitrogen atoms doubly-bound to a carbon skeleton containing imino groups having carbon atoms of imino groups bound to hydrogen atoms or to acyclic carbon atoms to carbon atoms of a saturated carbon skeleton being acyclic
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C251/00—Compounds containing nitrogen atoms doubly-bound to a carbon skeleton
- C07C251/72—Hydrazones
- C07C251/74—Hydrazones having doubly-bound carbon atoms of hydrazone groups bound to hydrogen atoms or to acyclic carbon atoms
- C07C251/76—Hydrazones having doubly-bound carbon atoms of hydrazone groups bound to hydrogen atoms or to acyclic carbon atoms to carbon atoms of a saturated carbon skeleton
-
- 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
- C07F15/04—Nickel compounds
-
- 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
- C07F15/04—Nickel compounds
- C07F15/045—Nickel compounds without a metal-carbon linkage
-
- 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
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- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F17/00—Metallocenes
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- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
- C07F7/02—Silicon compounds
- C07F7/08—Compounds having one or more C—Si linkages
- C07F7/0803—Compounds with Si-C or Si-Si linkages
- C07F7/081—Compounds with Si-C or Si-Si linkages comprising at least one atom selected from the elements N, O, halogen, S, Se or Te
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- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
- C07F7/02—Silicon compounds
- C07F7/08—Compounds having one or more C—Si linkages
- C07F7/10—Compounds having one or more C—Si linkages containing nitrogen having a Si-N linkage
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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
- C23C16/06—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of metallic material
- C23C16/18—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of metallic material from metallo-organic compounds
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/44—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]
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/28—Manufacture of electrodes on semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/268
- H01L21/283—Deposition of conductive or insulating materials for electrodes conducting electric current
- H01L21/285—Deposition of conductive or insulating materials for electrodes conducting electric current from a gas or vapour, e.g. condensation
Definitions
- the present invention relates to a novel alkoxide compound, a thin film forming material containing the compound, a method of forming a thin film using the thin film forming material, and a novel alcohol compound.
- Thin film materials containing metallic elements are applied to various applications because they exhibit electrical properties, optical properties, and the like.
- copper and copper-containing thin films are applied as wiring materials for LSIs because of their properties of high conductivity, high electromigration resistance, and high melting point.
- Nickel and nickel-containing thin films are mainly used as members of electronic parts such as resistive films and barrier films, members for recording media such as magnetic films, and members for thin film solar cells such as electrodes.
- Cobalt and cobalt-containing thin films are used for electrode films, resistance films, adhesive films, magnetic tapes, cemented carbide tools and the like.
- the thin film can be produced by sputtering, ion plating, coating thermal decomposition, MOD such as sol-gel method, chemical vapor deposition, etc., but it is excellent in composition controllability and step coverage. Because it has many advantages such as being suitable for mass production, and capable of hybrid integration, it may be described as chemical vapor deposition (hereinafter simply referred to as "CVD") including ALD (Atomic Layer Deposition) method. ) Is the optimal manufacturing process.
- CVD chemical vapor deposition
- ALD Atomic Layer Deposition
- Patent Document 1 discloses a raw material for forming a nickel-containing thin film by metal organic chemical vapor deposition (MOCVD).
- MOCVD metal organic chemical vapor deposition
- Patent Document 2 discloses a tertiary amino alkoxide compound of cobalt which can be used as a raw material for forming a cobalt-containing thin film by the MOCVD method.
- Patent Document 3 discloses a tertiary aminoalkoxide compound of copper which can be used as a raw material for forming a copper-containing thin film by a chemical vapor deposition method.
- Non-Patent Document 1 discloses tertiary imide alkoxide compounds of copper, nickel, cobalt, iron, manganese and chromium.
- the object of the present invention is to pyrolyze at a temperature of less than 200 ° C. for cobalt alkoxide compounds and copper alkoxide compounds and at 240 ° C. or less for nickel alkoxide compounds, for example, without pyrophoric properties and low melting points.
- the present invention relates to an alkoxide compound represented by the following general formula (I), a thin film forming material containing the alkoxide compound, and a method of forming a thin film using the thin film forming material .
- R 1 and R 2 each independently represent a hydrogen atom, a hydrocarbon group having 1 to 12 carbon atoms, or a group represented by the following general formulas (X-1) to (X-8).
- R 3 represents a hydrogen atom, a hydrocarbon group having 1 to 3 carbon atoms, or a group represented by the following formulas (X-1) to (X-8), provided that R 1 is a methyl group,
- R 2 is a methyl group or an ethyl group
- R 3 represents a hydrogen atom or a group represented by the following general formulas (X-1) to (X-8).
- L represents a hydrogen atom, a halogen atom, a hydroxyl group, an amino group, an adi group, a phosphide group, a nitrile group, a carbonyl group, a hydrocarbon group having 1 to 12 carbon atoms, or the following general formulas (L-1) to (L-13) Represents a group represented by).
- M represents a metal atom or a silicon atom
- n represents an integer of 1 or more
- m represents an integer of 0 or more
- n + m represents a valence number of a metal atom or a silicon atom represented by M.
- R X1 to R X12 each independently represent a hydrogen atom or a hydrocarbon group having 1 to 12 carbon atoms, and A 1 to A 3 each represent an alkanediyl group having 1 to 6 carbon atoms.
- R L1 to R L31 each independently represent a hydrogen atom or a hydrocarbon group having 1 to 12 carbon atoms, and A 4 to A 7 each represent an alkanediyl group having 1 to 6 carbon atoms.
- R L1 to R L31 is a hydrocarbon group having 1 to 12 carbon atoms, a hydrogen atom in the hydrocarbon group may be substituted by a halogen atom or an amino group.
- the present invention relates to an alcohol compound represented by the following general formula (II).
- R 4 and R 5 each independently represent a hydrogen atom, a hydrocarbon group having 1 to 12 carbon atoms, or a group represented by the following formulas (Y-1) to (Y-8).
- R 6 represents a hydrogen atom, a hydrocarbon group having 1 to 3 carbon atoms, or a group represented by the following formulas (Y-1) to (Y-8).
- R 4 is a methyl group and R 5 is a methyl group or an ethyl group
- R 6 represents hydrogen or a group represented by the following general formulas (Y-1) to (Y-8).
- R Y1 to R Y12 each independently represent a hydrogen atom or a hydrocarbon group having 1 to 12 carbon atoms, and A 8 to A 10 each represent an alkanediyl group having 1 to 6 carbon atoms.
- the present invention can be pyrolyzed at a temperature of less than 200 ° C. for cobalt alkoxide compounds and copper alkoxide compounds and at a temperature of 240 ° C. or less for nickel alkoxide compounds.
- An alkoxide compound exhibiting sufficient volatility can be obtained.
- the alkoxide compound is particularly suitable as a thin film forming material for forming a metal thin film by a CVD method.
- novel alcohol compounds can be provided.
- the alkoxide compound of the present invention is represented by the above general formula (I), is suitable as a precursor of a thin film manufacturing method having a vaporization step such as CVD method, and forms a thin film using the ALD method. It can also be done.
- the alkoxide compound of the present invention is a compound having a low melting point and becoming a liquid at 30 ° C. or a liquid upon slight heating.
- a compound having a low melting point is suitable as a precursor of a thin film production method having a vaporization step such as a CVD method because the compound has good transportability.
- R 1 and R 2 each independently represent a hydrogen atom, a hydrocarbon group having 1 to 12 carbon atoms, or the above general formulas (X-1) to (X-8) Represents a group to be represented.
- hydrocarbon group having 1 to 12 carbon atoms represented by R 1 and R 2 for example, alkyl, alkenyl, cycloalkyl, aryl, cyclopentadienyl and the like can be used.
- alkyl examples include methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, tert-butyl, pentyl, amyl, isoamyl, hexyl, heptyl, isoheptyl, octyl, isooctyl, 2-ethylhexyl, nonyl and isononyl. , Decyl, dodecyl and the like.
- alkenyl examples include vinyl, 1-methylethenyl, 2-methylethenyl, propenyl, butenyl, isobutenyl, pentenyl, hexenyl, heptenyl, octenyl, decenyl and the like.
- cycloalkyl examples include cyclohexyl, cyclopentyl, cycloheptyl, methylcyclopentyl, methylcyclohexyl, methylcycloheptyl, cyclopentenyl, cyclohexenyl, cycloheptenyl, methylcyclopentenyl, methylcyclohexenyl, methylcycloheptenyl and the like.
- aryl examples include phenyl, naphthyl, 2-methylphenyl, 3-methylphenyl, 4-methylphenyl, 4-vinylphenyl, 3-isopropylphenyl, 4-isopropylphenyl, 4-butylphenyl, 4-isobutylphenyl 4-tert-butylphenyl, 4-hexylphenyl, 4-cyclohexylphenyl and the like.
- cyclopentadienyl examples include cyclopentadienyl, methylcyclopentadienyl, ethylcyclopentadienyl, propylcyclopentadienyl, isopropylcyclopentadienyl, butylcyclopentadienyl and sec-butylcyclopentadienyl. Dienyl, isobutylcyclopentadienyl, tert-butylcyclopentadienyl, dimethylcyclopentadienyl, tetramethylcyclopentadienyl and the like can be mentioned.
- R 3 represents a hydrogen atom, a hydrocarbon group having 1 to 3 carbon atoms, or a group represented by the above general formulas (X-1) to (X-8).
- hydrocarbon group having 1 to 3 carbon atoms represented by R 3 include methyl, ethyl, propyl, isopropyl, vinyl, 1-methylethenyl, 2-methylethenyl, propenyl and the like.
- R X1 to R X12 each independently represent a hydrogen atom or a hydrocarbon group having 1 to 12 carbon atoms, and A 1 to A 3 represent carbon Represents an alkanediyl group having 1 to 6 atoms.
- hydrocarbon group having 1 to 12 carbon atoms represented by R X1 to R X12 include the groups exemplified as the hydrocarbon group having 1 to 12 carbon atoms represented by R 1 and R 2 and The same example can be mentioned.
- Examples of the alkanediyl group having 1 to 6 carbon atoms represented by the above A 1 to A 3 include methylene, ethylene, propylene and butylene.
- Examples of the group represented by the above general formula (X-1) include dimethylaminomethyl, ethylmethylaminomethyl, diethylaminomethyl, dimethylaminoethyl, ethylmethylaminoethyl, diethylaminoethyl and the like.
- Examples of the group represented by the above general formula (X-2) include methylamino, ethylamino, propylamino, isopropylamino, butylamino, sec-butylamino, tert-butylamino, isobutylamino and the like.
- Examples of the group represented by the above general formula (X-3) include dimethylamino, diethylamino, dipropylamino, diisopropylamino, dibutylamino, di-sec-butylamino, di-sec-butylamino, ethylmethylamino and propyl. Methylamino, isopropylmethylamino and the like can be mentioned.
- Examples of the compound giving the group represented by the above general formula (X-4) include ethylene diamino, hexamethylene diamino, N, N-dimethyl ethylene diamino and the like.
- Examples of the group represented by the above general formula (X-5) include di (trimethylsilyl) amino, di (triethylsilyl) amino and the like.
- Examples of the group represented by the above general formula (X-6) include trimethylsilyl and triethylsilyl.
- Examples of the group represented by the above general formula (X-7) include methoxy, ethoxy, propoxy, isopropoxy, butoxy, sec-butoxy, iso-butoxy, tert-butoxy, pentoxy, isopentoxy, tert-pentoxy and the like. .
- Examples of the group represented by the above general formula (X-8) include hydroxymethyl, hydroxyethyl, hydroxypropyl, hydroxyisopropyl, hydroxybutyl and the like.
- R 1 is a methyl group and R 2 is a methyl group or an ethyl group
- R 3 is a hydrogen atom or the general formula (X-1) to (X-8) Represents a group represented by).
- R 1 , R 2 and R 3 when R 1 , R 2 and R 3 are used for forming a thin film having a step of vaporizing an alkoxide compound, those having a large vapor pressure and a low melting point are preferable.
- those which cause thermal decomposition at a temperature of less than 200 ° C. for cobalt alkoxide compounds and copper alkoxide compounds and at 240 ° C. or less for nickel alkoxide compounds are preferable.
- R 1 and R 2 each independently represent a hydrogen atom, a hydrocarbon group having 1 to 12 carbon atoms, or a group represented by (X-5) because the vapor pressure is high.
- R 1 and R 2 when at least one of R 1 and R 2 is an alkyl having 1 to 5 carbon atoms, di (trimethylsilyl) amino or di (triethylsilyl) amino, it is particularly preferable because of its low melting point.
- R 1 and R 2 are ethyl is preferable because of its low melting point
- R 1 , R 2 and R 3 are ethyl is particularly preferable because of its low melting point.
- R 1 , R 2 and R 3 can be arbitrarily selected according to the solubility in the solvent used, the thin film formation reaction and the like.
- L is a hydrogen atom, a halogen, a hydroxyl group, an amino group, an adi group, a phosphide group, a nitrile group, a carbonyl group, a hydrocarbon group having 1 to 12 carbon atoms or the above general formula This represents a group represented by (L-1) to (L-13).
- R L1 to R L31 in the general formulas (L-1) to (L-13) each independently represent a hydrogen atom or a hydrocarbon group having 1 to 12 carbon atoms, and A 4 to A 7 each represent a carbon atom Represents an alkanediyl group of 1 to 6;
- R L1 to R L31 in the general formulas (L-1) to (L-13) are a hydrocarbon group having 1 to 12 carbon atoms, the hydrogen atom in the hydrocarbon group is substituted by a halogen atom or an amino group It may be done.
- hydrocarbon group having 1 to 12 carbon atoms represented by R L1 to R L31 are the same as the groups exemplified as the hydrocarbon group having 1 to 12 carbon atoms represented by R 1 and R 2. Groups can be mentioned.
- alkanediyl groups of the A 4 ⁇ 1 carbon atoms represented by A 7 ⁇ 6 is exemplified as alkanediyl group having 1 to 6 carbon atoms represented by A 1 ⁇ A 3 above
- alkanediyl group having 1 to 6 carbon atoms represented by A 1 ⁇ A 3 above The same groups as the groups can be mentioned.
- Examples of the group represented by the above general formula (L-1) include dimethylaminomethyl, ethylmethylaminomethyl, diethylaminomethyl, dimethylaminoethyl, ethylmethylaminoethyl, diethylaminoethyl and the like.
- Examples of the group represented by the above general formula (L-2) include methylamino, ethylamino, propylamino, isopropylamino, butylamino, sec-butylamino, tert-butylamino, isobutylamino and the like.
- Examples of the group represented by the above general formula (L-3) include dimethylamino, diethylamino, dipropylamino, diisopropylamino, dibutylamino, di-sec-butylamino, di-sec-butylamino, ethylmethylamino and propyl. Methylamino, isopropylmethylamino and the like can be mentioned.
- Examples of the compound giving the group represented by the above general formula (L-4) include ethylene diamino, hexamethylene diamino, N, N-dimethyl ethylene diamino and the like.
- Examples of the group represented by the above general formula (L-5) include di (trimethylsilyl) amino, di (triethylsilyl) amino and the like.
- Examples of the group represented by the above general formula (L-6) include trimethylsilyl and triethylsilyl.
- Examples of the group represented by the above general formula (L-7) include methoxy, ethoxy, propoxy, isopropoxy, butoxy, sec-butoxy, iso-butoxy, tert-butoxy, pentoxy, isopentoxy, tert-pentoxy and the like. .
- Examples of the group represented by the above general formula (L-8) include hydroxymethyl, hydroxyethyl, hydroxypropyl, hydroxyisopropyl, hydroxybutyl and the like.
- Examples of the group represented by the above general formula (L-9) include dimethylaminoethoxy, diethylaminoethoxy, dimethylaminopropoxy, ethylmethylaminopropoxy and diethylaminopropoxy.
- Examples of the group represented by the above general formula (L-10) include the followings. Groups represented by (L-10-1) to (L-10-5) can be mentioned. In addition, following Chemical formula No. In (L-10-1) to (L-10-5), "Me” represents methyl, “Et” represents ethyl, “iPr” represents isopropyl, and “tBu” represents tertiary butyl.
- Examples of the group represented by the above general formula (L-11) include those represented by the following chemical formula No. Groups represented by (L-11-1) to (L-11-3) can be mentioned.
- Chemical formula No. In (L-11-1) to (L-11-3) "Me” represents methyl, “iPr” represents isopropyl, and “tBu” represents tertiary butyl.
- Examples of the organic compound giving a group represented by the above general formula (L-11) include N, N′-diisopropylacetamidinate, N, N′-di-t-butylacetamidinate, N, N'-diisopropyl-2-t-butylamidinato etc. may be mentioned.
- Examples of the group represented by the above general formula (L-12) include the followings. Groups represented by (L-12-1) to (L-12-8) can be mentioned. In addition, following Chemical formula No. In (L-12-1) to (L-12-8), "Me” represents methyl, “iPr” represents isopropyl, and “tBu” represents tertiary butyl.
- Examples of the organic compound giving a group represented by the above general formula (L-12) include acetylacetone, hexane-2,4-dione, 5-methylhexane-2,4-dione and heptane-2,4. -Dione, 2-methylheptane-3,5-dione, 2,6-dimethylheptane-3,5-dione, 1,1,1-trifluoropentane-2,4-dione, 1,1,1-triol Fluoro-5,5-dimethylhexane-2,4-dione, 1,1,1,5,5,5-hexafluoropentane-2,4-dione, 1,3-diperfluorohexylpropane-1,3 -Dione, 1,1,5,5-tetramethyl-1-methoxyhexane-2,4-dione, 2,2,6,6-tetramethyl-1-methoxyheptane-3,5-dione, 2,2 , 6,6-
- Examples of the group represented by the above general formula (L-13) include the followings. Groups represented by (L-13-1) to (L-13-8) can be mentioned. In addition, following Chemical formula No. In (L-13-1) to (L-13-8), "Me” represents methyl, “iPr” represents isopropyl, and “tBu” represents tertiary butyl.
- Examples of the organic compound giving the group represented by the above general formula (L-13) include N-isopropyl-4- (isopropylimino) pent-2-en-2-amine and N-isopropyl-4- (Isopropylimino) -3-methylpent-2-en-2-amine, N- (tert-butyl) -4- (tert-butylimino) pent-2-en-2-amine, N- (tert-butyl)- 4- (tert-Butylimino) -3-methylpent-2-en-2-amine, N-isopropyl-5- (isopropylimino) -2,6-dimethylhept-3-en-3-amine, N-isopropyl-5 -(Isopropylimino) -2,4,6-trimethylhept-3-en-3-amine, N- (tert-butyl) -5- (tert-butylimino) -2,2,6,6-Tetramethylhept-3
- L is a cyclopentadienyl group represented by cyclopentadienyl, methylcyclopentadienyl, ethylcyclopentadienyl and pentamethylcyclopentadienyl; In some cases or when it is a group represented by (L-11), it is particularly preferable because of its high thermal stability and high vapor pressure.
- L may be the same or different.
- M represents a metal atom or a silicon atom.
- the metal atom is not particularly limited, and, for example, lithium, sodium, potassium, magnesium, calcium, strontium, barium, radium, scandium, yttrium, titanium, zirconium, hafnium, vanadium, niobium, tantalum, chromium, Molybdenum, tungsten, manganese, iron, osmium, cobalt, rhodium, iridium, nickel, palladium, platinum, copper, silver, gold, zinc, cadmium, aluminum, gallium, indium, germanium, tin, lead, antimony, bismuth, lanthanum, And cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium and ytterbium.
- n represents an integer of 1 or more
- m represents an integer of 0 or more
- n + m represents a valence number of a metal atom or a silicon atom represented by M.
- the alkoxide compound represented by the above general formula (I) may have optical activity, but the alkoxide compound of the present invention is not particularly distinguished by the R form and the S form, either of which may be used. It may be a mixture of S-body and any proportion. Racemates are inexpensive to produce.
- the alkoxide compound of the present invention is represented by the above general formula (I), but is not distinguished from the alkoxide compound represented by the following general formula (IA), and Also included are alkoxide compounds represented by A).
- R 1 and R 2 each independently represent a hydrogen atom, a hydrocarbon group having 1 to 12 carbon atoms, or a group represented by the following general formulas (X-1) to (X-8).
- R 3 represents a hydrogen atom, a hydrocarbon group having 1 to 3 carbon atoms, or a group represented by the following formulas (X-1) to (X-8), provided that R 1 is a methyl group,
- R 2 is a methyl group or an ethyl group
- R 3 represents a hydrogen atom or a group represented by the following general formulas (X-1) to (X-8).
- L represents a hydrogen atom, a halogen, a hydroxyl group, an amino group, an adi group, a phosphide group, a nitrile group, a carbonyl group, a hydrocarbon group having 1 to 12 carbon atoms, or the following general formulas (L-1) to (L-13) Represents a group represented by M represents a metal atom or a silicon atom, n represents an integer of 1 or more, m represents an integer of 0 or more, and n + m represents a valence number of a metal atom or a silicon atom represented by M. )
- R X1 to R X12 each independently represent a hydrogen atom or a hydrocarbon group having 1 to 12 carbon atoms, and A 1 to A 3 each represent an alkanediyl group having 1 to 6 carbon atoms.
- R L1 to R L31 each independently represent hydrogen or a hydrocarbon group having 1 to 12 carbon atoms
- a 4 to A 7 each represent an alkanediyl group having 1 to 6 carbon atoms.
- L1 to R L31 is a hydrocarbon group having 1 to 12 carbon atoms
- a hydrogen atom in the hydrocarbon group may be substituted by a halogen atom or an amino group.
- alkoxide compound represented by the general formula (I) for example, when M is cobalt, the following chemical formula No. 1 is used. 1 to No. The compound represented by 91 is mentioned. In addition, following Chemical formula No. 1 to No. In 91, “Me” represents methyl, “Et” represents ethyl, “iPr” represents isopropyl, “Cp” represents cyclopentadienyl, “MeCp” represents methylcyclopentadienyl, “ sCp “represents pentamethylcyclopentadienyl and” AMD "represents N, N'-diisopropyl acetamidinato.
- alkoxide compound represented by the general formula (I) for example, when M is nickel, the following chemical formula No. 1 is used. 173 to No. The compound represented by 263 is mentioned. In addition, following Chemical formula No. 173 to No. In 263, “Me” represents methyl, “Et” represents ethyl, “iPr” represents isopropyl, “Cp” represents cyclopentadienyl, “MeCp” represents methylcyclopentadienyl, " sCp "represents pentamethylcyclopentadienyl and” AMD "represents N, N'-diisopropyl acetamidinato.
- the alkoxide compound of the present invention is not particularly limited by the production method thereof, and is produced by applying a known reaction.
- a cobalt alkoxide compound for example, an inorganic salt such as cobalt halide, nitrate or the like or a hydrate thereof and a corresponding alcohol compound, a base such as sodium, sodium hydride, sodium amide, sodium hydroxide, sodium methylate, ammonia, amine or the like
- the reactive intermediate bis (dialkylamino) cobalt, bis (bis (trimethylsilyl) amino) cobalt, an amide compound of cobalt and the like can be mentioned.
- a method for producing an alkoxide compound in which m in the general formula (I) is 1 or more for example, after producing an alkoxide compound in which m is 0 in the general formula (I) by the above-mentioned production method The method of making it react with the organic compound or its alkali metal salt which gives a directive is mentioned.
- the raw material for thin film formation of the present invention uses the alkoxide compound of the present invention described above as a precursor of thin film, and the form thereof differs depending on the manufacturing process to which the raw material for thin film formation is applied.
- the raw material for forming a thin film of the present invention does not contain a metal compound and a semimetal compound other than the above-mentioned alkoxide compound.
- the raw material for forming a thin film of the present invention is a compound containing a desired metal and / or metalloid in addition to the above alkoxide compound.
- the thin film forming material of the present invention may further contain an organic solvent and / or a nucleophile, as described later.
- the physical properties of the alkoxide compound, which is a precursor are suitable for the CVD method and the ALD method. Useful as).
- the raw material for thin film formation of this invention is a raw material for chemical vapor deposition
- the form is suitably selected by methods, such as a transport supply method of the CVD method to be used.
- the CVD raw material is vaporized into a vapor by heating and / or depressurizing in a container (hereinafter, also simply referred to as a raw material container) in which the raw material is stored.
- a container hereinafter, also simply referred to as a raw material container
- Gas transport method for introducing the vapor into a film forming chamber (hereinafter also referred to as a deposition reaction unit) in which a substrate is installed, together with a carrier gas such as argon, nitrogen, or helium used accordingly
- a carrier gas such as argon, nitrogen, or helium used accordingly
- the raw material is transported in the form of liquid or solution to a vaporization chamber, vaporized by heating and / or depressurization in the vaporization chamber to turn into a vapor, and the vapor is introduced into the deposition chamber.
- the alkoxide compound represented by the above general formula (I) can be used as a raw material for CVD.
- the alkoxide compound itself represented by the above general formula (I) or a solution in which the compound is dissolved in an organic solvent can be used as a raw material for CVD.
- These CVD materials may further contain other precursors, nucleophilic reagents and the like.
- the method of vaporizing and supplying the raw materials for CVD independently for each component (hereinafter sometimes referred to as single source method) and the multi-component raw material were mixed in advance with a desired composition.
- a method of vaporizing and supplying the mixed material (hereinafter sometimes referred to as a cocktail source method).
- a cocktail source method a mixture of the alkoxide compound of the present invention and another precursor or a mixed solution of the mixture in an organic solvent can be used as a raw material for CVD.
- the mixture or mixed solution may further contain a nucleophile or the like.
- the CVD material containing R body and the CVD material containing S body may be vaporized separately.
- the CVD material containing a mixture of R and S form may be vaporized.
- the said organic solvent does not receive a restriction
- the organic solvent include acetic acid esters such as ethyl acetate, butyl acetate and methoxyethyl acetate; tetrahydrofuran, tetrahydropyran, ethylene glycol dimethyl ether, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, dibutyl ether, ethers such as dioxane; methyl Ketones such as butyl ketone, methyl isobutyl ketone, ethyl butyl ketone, dipropyl ketone, diisobutyl ketone, methyl amyl ketone, cyclohexanone and methyl cyclohexanone; hexane, cyclohexane, methylcyclohexane, dimethylcyclohexane, dimethylcyclohexane,
- the total amount of the precursor in the raw material for CVD which is a solution in which the precursor is dissolved in the organic solvent, is 0.01 to 2.0 mol / l, particularly 0.05 to 1.0 mol / l. It is preferable to use a liter.
- the amount of the whole precursor is the quantity of the alkoxide compound of this invention, when the raw material for thin film formation of this invention does not contain metal compounds other than the alkoxide compound of this invention and semimetal compounds,
- the raw material for forming a thin film of the present invention contains a compound containing another metal in addition to the alkoxide compound and / or a compound containing a metalloid, the total amount of the alkoxide compound of the present invention and the other precursor is Do.
- the other precursors mentioned above are known in the art and their methods of preparation are also known.
- the inorganic salt of the metal described above or the hydrate thereof is reacted with an alkali metal alkoxide of the alcohol compound, for example.
- a precursor can be produced.
- metal inorganic salts or hydrates thereof include metal halides, nitrates and the like
- alkali metal alkoxides include sodium alkoxide, lithium alkoxide, potassium alkoxide and the like.
- the other precursor mentioned above is preferably a compound having similar thermal and / or oxidative degradation behavior to the alkoxide compound of the present invention in the case of the single source method, and in the case of the cocktail source method, the heat and / or oxidation.
- the reaction does not occur during mixing due to chemical reaction or the like.
- examples of the precursor containing titanium, zirconium or hafnium include compounds represented by the following formulas (II-1) to (II-5).
- M 1 represents titanium, zirconium or hafnium, and R a and R b may each independently be substituted with a halogen atom, and may contain an oxygen atom in the chain, and have 1 to 20 carbon atoms
- 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 represent
- R g , R h , R k and R j each independently represent a hydrogen atom or an alkyl group having 1 to 4 carbon atoms
- p is 0
- R represents an integer of 0 to 2
- r represents an integer of 0 to 3
- s represents an integer of 0 to 4
- t represents an integer of 1 to 4
- examples of the alkyl group represented by R a and R b include methyl, ethyl, propyl, isopropyl, butyl, sec-butyl, tert-butyl, isobutyl and 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, 2-butoxyethyl, 2- (2-methoxyethoxy) ethyl, 1-methoxy
- alkyl group represented by R c methyl, ethyl, propyl, isopropyl, butyl, sec-butyl, tert-butyl, isobutyl, amyl, iso-amyl, sec-amyl, tert-amyl, hexyl, 1-ethyl
- Examples include pentyl, cyclohexyl, 1-methylcyclohexyl, heptyl, isoheptyl, tertiary heptyl, n-octyl, isooctyl, tertiary octyl, 2-ethylhexyl and the like.
- the alkylene group represented by R d is a group provided by a 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-butane Diol, 2-ethyl-2-butyl-1,3-propanediol, 2,4-pentanediol, 2-methyl-1,3-propanediol, 1-methyl-2,4-pentanediol and the like can be mentioned.
- examples of the alkyl group represented by R e and R f include methyl, ethyl, propyl, 2-propyl and the like, and as the alkyl group represented by R g , R h , R j and R k , Examples include methyl, ethyl, propyl, isopropyl, butyl, sec-butyl, tert-butyl, isobutyl and the like.
- tetrakis (ethoxy) titanium tetrakis (2-propoxy) titanium
- tetrakis (butoxy) titanium tetrakis (butoxy) titanium
- tetrakis (isobutoxy) titanium tetrakis (tert-butoxy) as a precursor containing titanium.
- Tetrakisalkoxytitaniums such as titanium, tetrakis (tertiary amyl) titanium, tetrakis (1-methoxy-2-methyl-2-propoxy) titanium, etc .; tetrakis (pentane-2,4-dionato) titanium, (2,6- Tetrakis ⁇ -diketonato titaniums such as dimethylheptane-3,5-dionato) titanium, tetrakis (2,2,6,6-tetramethylheptane-3,5-dionato) titanium; bis (methoxy) bis (penta) -2,4-Dionato) titanium, bis (ethoxy) bis (pentane-2,4-dionato) titanium, bis (tertiary butoxy) bis (pentane-2,4-dionato) titanium, bis (methoxy) bis (2) , 6-Dimethylheptane-3,5-dionato) titanium, bis (ethoxy) bis (2,
- glycoxybis ( ⁇ -diketonato) titaniums such as (Cyclopentadienyl) tris (dimethylamino) titanium, (ethylcyclopentadienyl) tris (dimethylamino) titanium, (cyclopentadienyl) tris (dimethylamino) titanium, (methylcyclopentadienyl) tris (ethyl) (Methylamino) titanium, (ethylcyclopentadienyl) tris (ethylmethylamino) titanium, (cyclopentadienyl) tris (ethylmethylamino) titanium, (methylcyclopentadienyl) tris (diethylamino) titanium, (ethylcyclo) (Cyclopentadienyl) tris (dialkylamino) titaniums such as pentadienyl) tris (diethylamino) titanium, (cyclopentadien
- precursors containing a rare earth element include compounds represented by the following formulas (III-1) to (III to 3).
- M 2 represents a rare earth atom, and each of R a and R b independently may be substituted with a halogen atom, and may contain an oxygen atom in the chain, and 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 represent a hydrogen atom or an alkyl group having 1 to 3 carbon atoms
- R g and R j each represent 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.
- rare earth atoms represented by M 2 in the above-mentioned precursors containing rare earth elements scandium, yttrium, lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, Examples thereof include ytterbium and lutetium, and examples of groups represented by R a , R b , R c , R e , R f , R g and R j include the groups exemplified for the above-mentioned titanium precursor.
- the raw material for forming a thin film of the present invention may optionally contain a nucleophile in order to impart stability to the alkoxide compound of the present invention and other precursors.
- a nucleophile ethylene glycol ethers such as glyme, diglyme, triglyme, tetraglyme, 18-crown-6, dicyclohexyl-18-crown-6, 24-crown-8, dicyclohexyl-24-crown-8 Crown ethers such as dibenzo-24-crown-8, ethylenediamine, N, N'-tetramethylethylenediamine, diethylenetriamine, triethylenetetramine, tetraethylenepentamine, pentaethylenehexamine, 1,1,4,7,7- Polyamines such as pentamethyldiethylenetriamine, 1,1,4,7,10,10-hexamethyltriethylenetetramine, triethoxytriethyleneamine, cyclic polyamines such as cyclam and cyclen
- the raw material for thin film formation of the present invention is made to contain as much as possible no impurity metal element other than the component which constitutes this, impurity halogen such as impurity chlorine, and impurity organic.
- the impurity metal element content is preferably 100 ppb or less, more preferably 10 ppb or less, and 1 ppm or less in total, and more preferably 100 ppb or less in each element.
- the film is used as a gate insulating film, gate film or barrier layer of LSI, it is necessary to reduce the content of alkali metal elements and alkaline earth metal elements which affect the electric characteristics of the obtained thin film.
- the total amount of the organic impurities is preferably 500 ppm or less, more preferably 50 ppm or less, and most preferably 10 ppm or less.
- water causes particle generation in the chemical vapor deposition raw material and particles generation during thin film formation, and therefore, for metal compounds, organic solvents and nucleophiles, to reduce their respective water content. It is better to remove water as much as possible before use.
- the water content of each of the metal compound, the organic solvent and the nucleophile is preferably 10 ppm or less, more preferably 1 ppm or less.
- the raw material for thin film formation of the present invention is preferably made to contain particles as little as possible.
- the number of particles larger than 0.3 ⁇ m is preferably 100 or less in 1 ml of liquid phase, and larger than 0.2 ⁇ m
- the number of particles is more preferably 1000 or less in 1 ml of liquid phase, and most preferably the number of particles larger than 0.2 ⁇ m is 100 or less in 1 ml of liquid phase.
- a vapor obtained by vaporizing the raw material for thin film deposition of the present invention and a reactive gas used as needed Is introduced into a deposition chamber in which the precursor is placed, and then the precursor is decomposed and / or chemically reacted on the substrate to grow and deposit a metal-containing thin film on the substrate surface.
- a vapor obtained by vaporizing the raw material for thin film deposition of the present invention and a reactive gas used as needed Is introduced into a deposition chamber in which the precursor is placed, and then the precursor is decomposed and / or chemically reacted on the substrate to grow and deposit a metal-containing thin film on the substrate surface.
- Examples of the reactive gas to be used according to the above requirements include oxygen, ozone, nitrogen dioxide, nitrogen monoxide, water vapor, hydrogen peroxide, formic acid, acetic acid, acetic anhydride and the like as an oxidizing gas.
- Examples of reducing substances include hydrogen
- examples of producing nitrides include organic amine compounds such as monoalkylamines, dialkylamines, trialkylamines, alkylenediamines, hydrazine, ammonia and the like, Can be used alone or in combination of two or more.
- thermal CVD to react a raw material gas or a raw material gas with a reactive gas by heat alone to deposit a thin film
- plasma CVD using heat and plasma photo CVD using heat and light
- thermal And photoplasma CVD using light and plasma thermal And photoplasma CVD using light and plasma
- ALD in which the deposition reaction of CVD is divided into elementary processes and deposition is performed stepwise at the molecular level.
- Examples of the material of the substrate include: silicon; ceramics such as silicon nitride, titanium nitride, tantalum nitride, titanium oxide, titanium nitride, ruthenium oxide, ruthenium oxide, zirconium oxide, hafnium oxide, lanthanum oxide; glass; metals such as metallic ruthenium .
- the shape of the substrate may be plate-like, spherical, fibrous or scaly, and the substrate surface may be flat or may have a three-dimensional structure such as a trench structure.
- the above-mentioned production conditions include a reaction temperature (substrate temperature), a reaction pressure, a deposition rate and the like.
- the reaction temperature is preferably 100 ° C. or higher at which the alkoxide compound of the present invention reacts sufficiently, and more preferably 150 ° C. to 400 ° C.
- the reaction pressure is preferably atmospheric pressure to 10 Pa in the case of thermal CVD or optical CVD, and is preferably 2000 Pa to 10 Pa in the case of using plasma.
- the deposition rate can be controlled by the supply conditions of the raw material (evaporation temperature, evaporation pressure), reaction temperature, and reaction pressure.
- the deposition rate is preferably 0.01 to 100 nm / min, and more preferably 1 to 50 nm / min because a high deposition rate may deteriorate the properties of the obtained thin film, and a small deposition rate may cause problems in productivity.
- the number of cycles is controlled to obtain a desired film thickness.
- the above-mentioned production conditions further include the temperature and pressure at the time of vaporizing the thin film forming material to form a vapor.
- the step of vaporizing the thin film forming material into vapor may be performed in the material container or in the vaporizing chamber. In any case, it is preferable to evaporate the material for thin film formation of the present invention at 0 to 150 ° C.
- the pressure in the material container and the pressure in the vaporization chamber are preferably each 1 to 10000 Pa.
- the thin film forming method of the present invention adopts the ALD method, and the raw material for thin film formation is vaporized into vapor by the above-mentioned transport supply method, and the raw material introducing step of introducing the vapor into the film forming chamber, A precursor thin film forming step of forming a precursor thin film on the surface of the substrate by the alkoxide compound in the vapor; an exhausting step of exhausting unreacted alkoxide compound gas; and reacting the precursor thin film with reactive gas
- the method may have a metal-containing thin film forming step of reacting to form a thin film containing the above metal on the surface of the substrate.
- the case where a metal oxide thin film is formed is demonstrated in detail about an above-mentioned each process.
- the metal oxide thin film is formed by the ALD method, first, the raw material introduction step described above is performed. The preferable temperature and pressure when using the thin film forming material as a vapor are the same as those described above.
- a precursor thin film is formed on the substrate surface by an alkoxide compound introduced into the deposition reaction part (precursor thin film formation step). At this time, the substrate may be heated or the deposition reaction part may be heated to apply heat.
- the precursor thin film formed in this step is a metal oxide thin film or a thin film formed by decomposition and / or reaction of a part of an alkoxide compound, and has a composition different from that of the target metal oxide thin film .
- Room temperature to 500 ° C. is preferable, and 150 to 350 ° C. is more preferable for the substrate temperature when this step is performed.
- the pressure of the system (in the deposition chamber) when this step is performed is preferably 1 to 10000 Pa, and more preferably 10 to 1000 Pa.
- unreacted alkoxide compound gas and by-produced gas are exhausted from the deposition reaction section (exhaust process).
- the unreacted alkoxide compound gas and by-produced gas are ideally exhausted completely from the deposition reaction part, but they do not necessarily have to be exhausted completely.
- an evacuation method a method of purging the inside of the system with an inert gas such as nitrogen, helium, argon, a method of evacuation by depressurizing the inside of the system, a method combining these, etc. may be mentioned.
- the degree of reduced pressure when reducing the pressure is preferably 0.01 to 300 Pa, and more preferably 0.01 to 100 Pa.
- an oxidizing gas is introduced into the deposition reaction part, and the metal oxide thin film is obtained from the precursor thin film obtained in the precursor thin film forming step described above by the action of the oxidizing gas or the action of the oxidizing gas and heat.
- Forming metal oxide-containing thin film forming step. Room temperature to 500 ° C. is preferable, and 150 to 350 ° C. is more preferable as a temperature when heat is applied in this step.
- the pressure of the system (in the deposition chamber) when this step is performed is preferably 1 to 10000 Pa, and more preferably 10 to 1000 Pa.
- the alkoxide compound of the present invention has good reactivity with an oxidizing gas, and a metal oxide thin film can be obtained.
- the thin film deposition according to may be one cycle, and this cycle may be repeated multiple times until a thin film having the required film thickness is obtained.
- unreacted alkoxide compound gas and reactive gas oxidizing gas in the case of forming a metal oxide thin film
- the metal oxide thin film by the ALD method energy such as plasma, light, voltage or the like may be applied, or a catalyst may be used.
- the time of applying the energy and the time of using the catalyst are not particularly limited.
- the heating time in the precursor thin film forming step or the metal oxide containing thin film forming step At the time of evacuation in the system in the evacuation step, it may be at the time of introduction of oxidizing gas in the step of forming a metal oxide-containing thin film, or between the above-mentioned steps.
- annealing may be performed in an inert atmosphere, an oxidizing atmosphere or a reducing atmosphere to obtain better electrical characteristics. If embedding is required, a reflow process may be provided.
- the temperature in this case is 200 to 1000 ° C., preferably 250 to 500 ° C.
- a known apparatus for chemical vapor deposition can be used as an apparatus for producing a thin film using the material for thin film formation of the present invention.
- an apparatus capable of bubbling a precursor as shown in FIG. 1 and an apparatus having a vaporization chamber as shown in FIG. 2 can be mentioned.
- an apparatus capable of performing plasma processing on a reactive gas can be mentioned.
- an apparatus capable of simultaneously processing multiple wafers using a batch furnace can also be used.
- the thin film produced using the raw material for thin film formation of the present invention can be formed of a desired kind of metal, oxide ceramic, nitride ceramic, glass or the like by appropriately selecting other precursors, reactive gases and production conditions. It can be a thin film.
- the thin film is known to exhibit various electrical and optical properties and the like, and is applied to various applications.
- copper and copper-containing thin films are applied as wiring materials for LSIs because of their properties of high conductivity, high electromigration resistance, and high melting point.
- Nickel and nickel-containing thin films are mainly used as members of electronic parts such as resistive films and barrier films, members for recording media such as magnetic films, and members for thin film solar cells such as electrodes.
- Cobalt and cobalt-containing thin films are used for electrode films, resistance films, adhesive films, magnetic tapes, cemented carbide tools and the like.
- the alcohol compound of the present invention is represented by the following general formula (II), and is a compound particularly suitable as a ligand used for a compound suitable as a precursor of a method for forming a thin film having a vaporization step such as CVD method It is.
- R 4 and R 5 each independently represent a hydrogen atom, a hydrocarbon group having 1 to 12 carbon atoms, or a group represented by the following formulas (Y-1) to (Y-8).
- R 6 represents a hydrogen atom, a hydrocarbon group having 1 to 3 carbon atoms, or a group represented by the following formulas (Y-1) to (Y-8).
- R 4 is a methyl group
- R 5 is a methyl group or an ethyl group
- R 6 represents a hydrogen atom or a group represented by the following general formulas (Y-1) to (Y-8) .
- R Y1 to R Y12 each independently represent a hydrogen atom or a hydrocarbon group having 1 to 12 carbon atoms, and A 8 to A 10 each represent an alkanediyl group having 1 to 6 carbon atoms.
- R 4 and R 5 each independently represent a hydrogen atom, a hydrocarbon group having 1 to 12 carbon atoms, or a group represented by the following general formulas (Y-1) to (Y-8) Represents
- an alkyl As a hydrocarbon group represented by said R 4 and R 5 , an alkyl, an alkenyl, a cycloalkyl, an aryl, cyclopentadienyl etc. can be used, for example.
- alkyl examples include methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, tert-butyl, pentyl, amyl, isoamyl, hexyl, heptyl, isoheptyl, octyl, isooctyl, 2-ethylhexyl, nonyl and isononyl. , Decyl, dodecyl and the like.
- alkenyl examples include vinyl, 1-methylethenyl, 2-methylethenyl, propenyl, butenyl, isobutenyl, pentenyl, hexenyl, heptenyl, octenyl, decenyl and the like.
- cycloalkyl examples include cyclohexyl, cyclopentyl, cycloheptyl, methylcyclopentyl, methylcyclohexyl, methylcycloheptyl, cyclopentenyl, cyclohexenyl, cycloheptenyl, methylcyclopentenyl, methylcyclohexenyl, methylcycloheptenyl and the like.
- aryl examples include phenyl, naphthyl, 2-methylphenyl, 3-methylphenyl, 4-methylphenyl, 4-vinylphenyl, 3-isopropylphenyl, 4-isopropylphenyl, 4-butylphenyl, 4-isobutylphenyl 4-tert-butylphenyl, 4-hexylphenyl, 4-cyclohexylphenyl and the like.
- cyclopentadienyl examples include cyclopentadienyl, methylcyclopentadienyl, ethylcyclopentadienyl, propylcyclopentadienyl, isopropylcyclopentadienyl, butylcyclopentadienyl and sec-butylcyclopentadienyl. Dienyl, isobutylcyclopentadienyl, tert-butylcyclopentadienyl, dimethylcyclopentadienyl, tetramethylcyclopentadienyl and the like can be mentioned.
- R 6 represents a hydrogen atom, a hydrocarbon group having 1 to 3 carbon atoms, or a group represented by the above general formulas (Y-1) to (Y-8).
- hydrocarbon group represented by R 6 above examples include methyl, ethyl, propyl, isopropyl, vinyl, 1-methylethenyl, 2-methylethenyl, propenyl and the like.
- R 4 when R 4 is a methyl group and R 5 is a methyl group or an ethyl group, R 6 is a hydrogen atom or the above general formulas (Y-1) to (Y-8) Represents a group to be represented.
- hydrocarbon group having 1 to 12 carbon atoms represented by R Y1 to R Y12 include the groups exemplified as the hydrocarbon group having 1 to 12 carbon atoms represented by R 4 and R 5 and Similar groups can be mentioned.
- Examples of the alkanediyl group having 1 to 6 carbon atoms represented by the above A 8 to A 10 include methylene, ethylene, propylene and butylene.
- Examples of the group represented by the above general formula (Y-1) include dimethylaminomethyl, ethylmethylaminomethyl, diethylaminomethyl, dimethylaminoethyl, ethylmethylaminoethyl, diethylaminoethyl and the like.
- Examples of the group represented by the above general formula (Y-2) include methylamino, ethylamino, propylamino, isopropylamino, butylamino, sec-butylamino, tert-butylamino, isobutylamino and the like.
- Examples of the group represented by the above general formula (Y-3) include dimethylamino, diethylamino, dipropylamino, diisopropylamino, dibutylamino, di-sec-butylamino, di-sec-butylamino, ethylmethylamino and propyl. Methylamino, isopropylmethylamino and the like can be mentioned.
- Examples of the compound giving the group represented by the above general formula (Y-4) include ethylene diamino, hexamethylene diamino, N, N-dimethyl ethylene diamino and the like.
- Examples of the group represented by the above general formula (Y-5) include di (trimethylsilyl) amino, di (triethylsilyl) amino and the like.
- Examples of the group represented by the above general formula (Y-6) include trimethylsilyl and triethylsilyl.
- Examples of the group represented by the above general formula (Y-7) include methoxy, ethoxy, propoxy, isopropoxy, butoxy, sec-butoxy, isobutoxy, tert-butoxy, pentoxy, isopentoxy, tert-pentoxy and the like. .
- Examples of the group represented by the above general formula (Y-8) include hydroxymethyl, hydroxyethyl, hydroxypropyl, hydroxyisopropyl, hydroxybutyl and the like.
- the alcohol compounds of the present invention may have optical isomers, but they are not distinguished by their optical isomerism.
- the alcohol compound of the present invention is not particularly limited by the production method thereof, and can be produced by applying a known reaction.
- a known reaction for example, as shown in the following reaction formula (1), magnesium is used as a catalyst to cause a Grignard reaction of an alkyl compound and an alkoxycarboxylic acid alkyl compound, and further a reaction of an alkylamine is extracted with an appropriate solvent and dehydrated.
- the magnesium compound is used as a catalyst, and an alkyl compound and an alkoxy ketone alkyl compound are subjected to Grignard reaction, and the reaction obtained by further reacting an alkylamine is extracted with an appropriate solvent and dehydrated as shown in the following reaction formula (2).
- an alkyl compound and a dialkyl diketone compound are subjected to a Grignard reaction, and further, an alkylamine is reacted and extracted with an appropriate solvent. And methods obtained by dehydration treatment.
- R z represents an alkyl group.
- the alcohol compound of the present invention can be used as a ligand of a metal compound used as a thin film forming material or the like.
- the alcohol compound of the present invention can also be used for applications such as solvents, perfumes, pesticides, medicines, synthetic raw materials such as various polymers, and the like.
- Example 1 Alcohol compound No. 1 Synthesis of 134]
- 22.43 g of 3-dimethoxymethyl-3-pentanol, 40 g of pure water and 3.6 g of 36% hydrochloric acid were added under ice-cooling and stirring was performed for 5 hours. Thereafter, 23.72 g of 40% aqueous methylamine solution was added dropwise with ice-cooling, and the reaction was allowed to proceed for 17 hours.
- the pH of the reaction solution at this time was 10-11. 32.9 g of toluene was added, the organic layer was extracted and separated, magnesium sulfate was added, and dehydration and filtration were performed.
- the solvent was distilled off at reduced pressure in an oil bath at 90 ° C. I got 134. The yield was 7.69 g, 43%.
- Example 2 Alcohol Compound No. Synthesis of 140 A diethyl ether solution of ethylmagnesium bromide (concentration: 21.85 mass%, 277 g) was added to the reaction flask, and the mixture was stirred in an ice-cold bath and cooled to around 0 ° C. To this solution was added dropwise methyldimethoxyacetate (25 g) over 1 hour to carry out a Grignard reaction. Thereafter, the temperature was returned to room temperature and reaction was performed for 12 hours. The reaction solution was ice-cooled, 200 g of a saturated aqueous solution of ammonium chloride was dropped, and then 10 mL of a 36% hydrochloric acid solution was dropped to adjust the pH to around neutral.
- ethylmagnesium bromide concentration: 21.85 mass%, 277 g
- Example 3 Alcohol Compound No. Synthesis of 146 19.67 g of 3-dimethoxymethyl-3-pentanol, 35 g of pure water and 8.9 g of 36% hydrochloric acid were added to a reaction flask under ice-cooling, and stirring was performed for 4 hours. Thereafter, 16.67 g of isopropylamine was added dropwise under ice-cooling and allowed to react for 18 hours. The pH of the reaction solution at this time was 10-11. 28.8 g of toluene was added, the organic layer was extracted and separated, magnesium sulfate was added, and dehydration and filtration were performed. The solvent was distilled off at reduced pressure in an oil bath at 90 ° C. I got 146. The yield was 13.48 g, 69%.
- Example 4 Alcohol Compound No. Synthesis of 166] 2.17 g of magnesium and 118 g of tetrahydrofuran were charged in a reaction flask, into which 11.3 g of 2-bromopropane was slowly dropped at a bath temperature of 50 ° C. After cooling to room temperature and stirring for 2 hours, 10.3 g of pyruvine aldehyde dimethyl acetal was slowly added dropwise, and stirred at room temperature for 20 hours. The mixture was quenched by adding 39 g of an aqueous 8% hydrochloric acid solution and 25.3 g of ammonium chloride.
- Example 5 Alcohol Compound No. 5 Synthesis of 167]
- 10.0 g of 1,1-dimethoxy-2,3-dimethyl-2-butanol (purity 90% product) and 10.0 g of H 2 O were charged, and 1.5 g of 36% aqueous hydrochloric acid solution under ice-cooling was placed therein.
- 11.5 g of isopropylamine was slowly added dropwise, and the mixture was warmed to room temperature and stirred for 20 hours.
- 70 g of toluene was added to extract the desired product into the organic layer.
- Example 6 Alkoxide Compound No. Synthesis of 43] In a 200-ml four-necked flask, 4.04 g of cobalt (II) chloride and 16 g of tetrahydrofuran were charged, and the mixture was stirred at room temperature. Among them, alcohol compound no. A solution of 8.77 g of sodium alkoxide prepared from 134 (3-methyliminomethyl-3-pentanol) diluted with 17 g of tetrahydrofuran was added dropwise with ice cooling. After completion of the dropwise addition, the mixture was stirred at room temperature for 16 hours and filtered. Tetrahydrofuran is removed from the obtained filtrate, and the residue is distilled under the conditions of 60 Pa and 130 ° C. 43 was obtained in a yield of 1.34 g, 14.5%.
- Example 7 Alkoxide Compound No. Synthesis of 49]
- 13.23 g of cobalt (II) chloride and 48 g of tetrahydrofuran were charged and stirred at room temperature.
- alcohol compound no. A solution of 33.04 g of sodium alkoxide prepared from 140 (3-ethyliminomethyl-3-pentanol) diluted with 50 g of tetrahydrofuran was added dropwise under ice cooling. After completion of the dropwise addition, the mixture was stirred at room temperature for 22 hours and filtered. Tetrahydrofuran is removed from the obtained filtrate, and the residue is distilled under the conditions of 40 Pa and 125 ° C. 49 were obtained in a yield of 28.70 g, 83.5%.
- the alkoxide compound No. 1 obtained.
- the results of 49 single crystal X-ray structural analysis are shown in FIG.
- Example 8 Alkoxide Compound No. Synthesis of 55]
- a 200-ml four-necked flask 5.75 g of cobalt (II) chloride and 18 g of tetrahydrofuran were charged and stirred at room temperature.
- alcohol compound no. A solution of 15.06 g of sodium alkoxide prepared from 146 (3-isopropyliminomethyl-3-pentanol) diluted with 17 g of tetrahydrofuran was added dropwise with ice cooling. After completion of the dropwise addition, the mixture was stirred at room temperature for 29 hours and filtered. Tetrahydrofuran is removed from the obtained filtrate, and the residue is distilled under the conditions of 50 Pa and 135 ° C. 55 was obtained in a yield of 5.53 g, 35.1%.
- Example 9 Alkoxide Compound No. Synthesis of 75] In a 100 ml three-necked flask, 1.52 g of cobalt (II) chloride and 8.22 g of tetrahydrofuran were charged, and the mixture was stirred at room temperature. Among them, alcohol compound no. A solution of 3.80 g of sodium alkoxide obtained from 166 (1-ethylimino-2,3-dimethyl-2-butanol) diluted with 7.95 g of tetrahydrofuran was added dropwise with ice cooling. After completion of the dropwise addition, the mixture was stirred at room temperature for 15 hours and filtered.
- Tetrahydrofuran is removed from the obtained filtrate, and the residue is distilled under the conditions of 45 Pa, a bath temperature of 130 ° C., and an overhead temperature of 90 ° C. 75 was obtained in a yield of 1.56 g, 39.3%.
- Example 10 Alkoxide Compound No. Synthesis of 171]
- 0.59 g of copper (II) methoxide was added to alcohol compound No. 1; 32 g of a 3.8% by mass toluene solution of 134 (3-methyliminomethyl-3-pentanol) was dropped. It immediately dissolved and turned purple, and was stirred as it was at room temperature for 20 hours.
- the toluene was distilled off at an oil bath temperature of 70 ° C. under slight vacuum, and then the residual toluene was completely distilled off at an oil bath temperature of 90 ° C. under vacuum.
- the resulting purple solid was distilled at 100 ° C. and 40 Pa to obtain the desired product.
- the resulting compound was a solid having a melting point of 60.degree.
- the yield of the compound was 70%.
- the obtained compound was subjected to single crystal X-ray structural analysis.
- FIG. 6 shows the molecular structure obtained by single crystal X-ray structural analysis. From this result, the compound obtained was alkoxide compound No. It could be confirmed that it was 171.
- Example 11 Alkoxide Compound No. Synthesis of 172]
- 0.62 g of copper (II) methoxide was added to alcohol compound No. 1; 38 g of a 3.7% by mass toluene solution of 140 (3-ethyliminomethyl-3-pentanol) was dropped. It immediately dissolved and turned purple, and was stirred as it was at room temperature for 18 hours.
- the toluene was distilled off at an oil bath temperature of 70 ° C. under slight vacuum, and then the residual toluene was completely distilled off at an oil bath temperature of 90 ° C. under vacuum.
- the resulting purple liquid was distilled at 100 ° C. and 40 Pa to obtain alkoxide liquid No. 1 which is a purple liquid.
- Alkoxide compound no. The yield of 172 was 45%.
- Example 12 Alkoxide Compound No. Synthesis of 221]
- a 500 ml four-necked flask 4.97 g of hexaamminenickel (II) chloride and 95 g of tetrahydrofuran were charged, and stirred at room temperature.
- Example 13 Compound No. Synthesis of 247] In a 200-ml four-necked flask, 6.88 g of hexaamminenickel (II) chloride and 42.8 g of tetrahydrofuran were charged and stirred at room temperature. Into it, a solution of 9.80 g of sodium alkoxide obtained from alcohol (1-ethylimino-2,3-dimethyl-2-butanol) diluted with 42.8 g of tetrahydrofuran was added dropwise under ice cooling. After completion of the dropwise addition, the mixture was stirred at room temperature for 14 hours.
- II hexaamminenickel
- alkoxide compound No. 43, 49, 55, 75, 171 and 172, comparative compounds 1 to 3 and alkoxide compound No. 1 When the compounds 221 and 247 and the comparison compound 6 are compared, alkoxide compound No. 2 is obtained. 43, 49, 55, 75, 171 and 172 are lower in temperature than the comparative compounds 1 to 3, and alkoxide compounds No. 1 to 3 are obtained. It was found that 221 and 247 can be pyrolyzed at a lower temperature than Comparative Compound 6. In addition, alkoxide compound No. The thermal decomposition temperature of 43, 49, 55, 75, 171, 172 and 221 is 200 ° C. or less.
- 171 is a compound having a low thermal decomposition initiation temperature and a melting point of 60 ° C., and the alkoxide compound No. 1 evaluated in Evaluation Example 2-6. 172 had a low thermal decomposition onset temperature, and was a compound in a liquid state at 30 ° C. Compounds that have a low melting point and a large temperature difference between the melting point and the thermal decomposition start temperature can be easily maintained in a liquid state, and because they require less energy for transportation, they are excellent as raw materials for chemical vapor deposition .
- Example 14 Production of Metallic Cobalt Thin Film by ALD Method Alkoxide compound no.
- a cobalt metal thin film was produced on a silicon wafer by the ALD method under the following conditions, using 43, 49, 55 and 75 as raw materials for chemical vapor deposition and using the apparatus shown in FIG.
- the film thickness is 2 to 4 nm.
- Is metallic cobalt confirmeded by Co2p peak by XPS analysis
- the film thickness obtained per cycle was 0.02 to 0.04 nm.
- Example 15 Production of Metallic Copper Thin Film by ALD Method Alkoxide compound no.
- a metal copper thin film was produced on a silicon wafer by the PEALD method under the following conditions using 171 and 172 as raw materials for chemical vapor deposition.
- the film thickness is 2 to 4 nm. Is metallic copper (confirmed by Cu2p peak by XPS analysis), and the carbon content was less than the detection lower limit of 0.1 atom%.
- the film thickness obtained per cycle was 0.02 to 0.04 nm.
- Reaction temperature (substrate temperature): 60 ° C., reactive gas; hydrogen gas, plasma output: 50 W
- Step A series of steps consisting of the following (1) to (4) was repeated 100 cycles as one cycle.
- Raw material container heating temperature The vapor of the raw material for chemical vapor deposition vaporized under the conditions of 60 ° C. and the pressure in the raw material container of 50 Pa is introduced and deposited for 30 seconds at a system pressure of 50 Pa.
- Reactive gas and plasma are introduced and reacted for 30 seconds at a system pressure of 50 Pa.
- (4) Remove unreacted material by argon purge for 5 seconds.
- Example 16 Production of Metallic Nickel Thin Film by ALD Method Alkoxide compound no.
- a metallic nickel thin film was produced on a silicon wafer by thermal ALD using the apparatus shown in FIG. 1 under the following conditions.
- the obtained thin film was subjected to film thickness measurement by X-ray reflectivity method, X-ray diffraction method and X-ray photoelectron spectroscopy to confirm the thin film structure and the thin film composition.
- the film composition was metallic nickel (confirmed by the Ni2p peak by XPS analysis), and the carbon and nitrogen contents were less than the detection limit of 0.1 atom%.
- the film thickness obtained per cycle was 0.02 to 0.04 nm.
- Reaction temperature (substrate temperature); 230 ° C, reactive gas; hydrogen gas (process)
- Vaporization chamber temperature The vapor of the raw material for chemical vapor deposition vaporized under the conditions of 70 ° C. and 50 Pa of the vaporization chamber is introduced and deposited for 30 seconds at a system pressure of 50 Pa.
- Reactive gas is introduced and reacted for 30 seconds at a system pressure of 50 Pa. (4) Remove unreacted material by argon purge for 5 seconds.
- Example 17 Production of Metallic Nickel Thin Film by ALD Method Alkoxide compound no.
- a metallic nickel thin film was produced on a silicon wafer by using the plasma deposition apparatus shown in FIG. 3 and the PEALD method under the following conditions, using 221 and 247 as raw materials for chemical vapor deposition, respectively.
- the film thickness was 50 to 70 nm in both cases.
- the film composition was metallic copper (confirmed by the Ni2p peak by XPS analysis), and the carbon and nitrogen contents were less than the detection limit of 0.1 atom%.
- the film thickness obtained per cycle was 0.05 to 0.07 nm.
- Step 2 Reaction temperature (substrate temperature); 70 ° C, reactive gas; hydrogen gas, plasma power: 50 W
- Step A series of steps consisting of the following (1) to (4) was repeated 1000 cycles as one cycle.
- Raw material container heating temperature The vapor of the raw material for chemical vapor deposition vaporized under the conditions of 70 ° C. and the pressure in the raw material container of 50 Pa is introduced and deposited for 30 seconds at a system pressure of 50 Pa.
- Reactive gas and plasma are introduced and reacted for 30 seconds at a system pressure of 50 Pa.
- (4) Remove unreacted material by argon purge for 5 seconds.
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Abstract
Description
例えば、化学気相成長用原料等を気化させて金属銅薄膜を形成する場合においては、200℃以上の加熱を行うことによって得られる金属銅薄膜の電気抵抗値が高くなってしまう問題があった。該問題の原因は特定できていないが、200℃以上の加熱を行うことによって、得られる薄膜中に存在する銅粒子の粒径が大きくなってしまうことや該粒子が凝集してしまうことが原因ではないかと推察される。そこで、金属銅薄膜形成用の化学気相成長法用原料としては、200℃未満で熱分解が発生する金属銅薄膜形成用の化学気相成長法用原料が求められていた。従来のアルコキシド化合物では、熱安定性の点で十分に満足し得るものはなかった。
即ち、本発明は、下記一般式(I)で表されるアルコキシド化合物、該アルコキシド化合物を含有してなる薄膜形成用原料、及び該薄膜形成用原料を用いた薄膜の形成方法に係るものである。
Lは、水素原子、ハロゲン原子、水酸基、アミノ基、アジ基、ホスフィド基、ニトリル基、カルボニル基、炭素原子数1~12の炭化水素基又は下記一般式(L-1)~(L-13)で表される基を表す。Mは、金属原子又はケイ素原子を表し、nは、1以上の整数を表し、mは、0以上の整数を表し、n+mは、Mで表される金属原子又はケイ素原子の価数を表す。)
ただし、R4がメチル基であり、R5がメチル基又はエチル基である場合、R6は水素又は下記一般式(Y-1)~(Y-8)で表される基を表す。
Lは、水素原子、ハロゲン、水酸基、アミノ基、アジ基、ホスフィド基、ニトリル基、カルボニル基、炭素原子数1~12の炭化水素基又は下記一般式(L-1)~(L-13)で表される基を表す。Mは、金属原子又はケイ素原子を表し、nは、1以上の整数を表し、mは、0以上の整数を表し、n+mは、Mで表される金属原子又はケイ素原子の価数を表す。)
また、堆積速度は、原料の供給条件(気化温度、気化圧力)、反応温度、反応圧力によりコントロールすることができる。堆積速度は、大きいと得られる薄膜の特性が悪化する場合があり、小さいと生産性に問題を生じる場合があるので、0.01~100nm/分が好ましく、1~50nm/分がより好ましい。また、ALD法の場合は、所望の膜厚が得られるようにサイクルの回数でコントロールされる。
ただし、R4がメチル基であり、R5がメチル基又はエチル基である場合、R6は、水素原子又は下記一般式(Y-1)~(Y-8)で表される基を表す。)
例えば、下記反応式(1)のようにマグネシウムを触媒として、アルキル化合物とアルコキシカルボン酸アルキル化合物とをグリニャール反応させ、さらにアルキルアミンを反応させたものを適切な溶媒で抽出し、脱水処理することで得る方法や、下記反応式(2)のように、マグネシウムを触媒として、アルキル化合物とアルコキシケトンアルキル化合物とをグリニャール反応させ、さらにアルキルアミンを反応させたものを適切な溶媒で抽出し、脱水処理することで得る方法や、下記反応式(3)のように、マグネシウムを触媒として、アルキル化合物とジアルキルジケトン化合物とをグリニャール反応させ、さらにアルキルアミンを反応させたものを適切な溶媒で抽出し、脱水処理することで得る方法が挙げられる。
反応フラスコに、3-ジメトキシメチル-3-ペンタノール22.43g、純水40g、36%塩酸3.6gを氷冷下で加えて、5時間撹拌を行った。その後、40%メチルアミン水溶液23.72gを氷冷下滴下し、17時間反応させた。この時の反応液のpHは10~11であった。トルエン32.9gを加え、有機層を抽出・分液し、硫酸マグネシウムを加えて脱水・ろ過を行った。減圧下オイルバス90℃にて溶媒を留去し、アルコール化合物No.134を得た。収量は7.69g、収率は43%であった。
(1)GC-MS m/z: 129(M+)
(3)元素分析 C:65.4質量%、H:12.1質量%、O:11.2質量%、N:11.3質量%(理論値;C:65.1質量%、H:11.7質量%、O:12.4質量%、N:10.8質量%)
反応フラスコに、エチルマグネシウムブロミドのジエチルエーテル溶液(濃度:21.85質量%、277g)を加え、氷冷バスにて撹拌し0℃付近まで冷却した。この溶液にメチルジメトキシアセテート(25g)を1時間で滴下し、グリニャール反応を行った。その後室温に戻して12時間反応を行った。反応液を氷冷して、飽和塩化アンモニウム水溶液200gを滴下した後、36%塩酸溶液10mLを滴下してpHを中性付近に調整した。その後、溶液を分液ロートに移してヘキサン50gで有機物を抽出・分液し、適量の硫酸マグネシウムで脱水した。このヘキサン懸濁液のろ過後、オイルバス65℃付近で脱溶媒を行った。オイルバス100℃付近減圧下で蒸留を行い、無色透明の3-ジメトキシメチル-3-ペンタノール22.4g(GC純度96.3%)を得た。3-ジメトキシメチル-3-ペンタノール、7gに純水10gと36%塩酸1gを氷冷下で加えて、終夜撹拌を行った。その後、33%エチルアミン水溶液9.5gを氷冷下滴下し、10時間反応させた。この時の反応液のpHは10~11であった。撹拌を止めると少量の有機層と水層に分離し、有機層はNMRの結果よりアルコール化合物No.140であることが分かった。目的物の収量は2.7g、収率は33%であった。
(1)GC-MS m/z: 143(M+)
(2)1NMR(溶媒:重ベンゼン)(ケミカルシフト:多重度:H数)
(7.020:s:1)(4.379:s:1)(3.171~3.193:q:2)(1.559~1.649:m:2)(1.310~1.400:m:2)(0.979~1.016:t:3)(0.837~0.874:t:6)
(3)元素分析 C:67.5質量%、H:12.1質量%、O:12.0質量%、N:9.6質量%(理論値;C:67.1質量%、H:12.0質量%、O:11.2質量%、N:9.8質量%)
反応フラスコに、3-ジメトキシメチル-3-ペンタノール19.67g、純水35g、36%塩酸8.9gを氷冷下で加えて、4時間撹拌を行った。その後、イソプロピルアミン16.67gを氷冷下滴下し、18時間反応させた。この時の反応液のpHは10~11であった。トルエン28.8gを加え、有機層を抽出・分液し、硫酸マグネシウムを加えて脱水・ろ過を行った。減圧下オイルバス90℃にて溶媒を留去し、アルコール化合物No.146を得た。収量は13.48g、収率は69%であった。
(1)GC-MS m/z: 157(M+)
(3)元素分析 C:69.0質量%、H:11.9質量%、O:11.0質量%、N:8.9質量%(理論値;C:68.7質量%、H:12.2質量%、O:10.2質量%、N:8.9質量%)
反応フラスコに、マグネシウム2.17gとテトラヒドロフラン118gを仕込み、その中にバス温度50℃で2-ブロモプロパン11.3gをゆっくりと滴下した。室温まで冷却し2時間撹拌した後、ピルビンアルデヒドジメチルアセタール10.3gをゆっくりと滴下し、室温下で20時間撹拌した。8%塩酸水溶液39gと塩化アンモニウム25.3gを加えてクエンチした。そこにヘキサン26.7gを加えて目的物(中間体)を有機層に抽出し、硫酸ナトリウムで乾燥させ、ろ過を行った。バス温度85℃、微減圧下でヘキサンを留去し、得られた残渣をバス温度85℃、微減圧下、塔頂温度50℃で蒸留し中間体である1,1-ジメトキシ-2,3-ジメチル-2-ブタノールを得た。1,1-ジメトキシ-2,3-ジメチル-2-ブタノール6.0gにH2O18.5gを加え、その中に室温下36%塩酸水溶液2.1gをゆっくりと滴下した。2時間撹拌後、33%エチルアミン水溶液15.3gを水冷下ゆっくりと滴下した。室温下20時間撹拌後、トルエン31.2gを加え目的物を有機層に抽出した。硫酸ナトリウムで脱水、ろ過を行い、バス温度85℃、微減圧でトルエンを留去した。得られた残渣をバス温度85℃、微減圧下で蒸留しアルコール化合物No.166を得た。収量は3.6g(GC純度92%)、収率は27%であった。
(1)GC-MS m/z: 143(M+)
(3)元素分析 C:67.4質量%、H:12.3質量%、O:10.5質量%、N:9.4質量%(理論値;C:67.0質量%、H:12.0質量%、O:11.2質量%、N:9.8質量%)
反応フラスコに、1,1-ジメトキシ-2,3-ジメチル-2-ブタノール10.0g(純度90%品)とH2O10.0gを仕込み、その中に氷冷下36%塩酸水溶液1.5gをゆっくりと滴下し、室温下で20時間撹拌した。氷冷下イソプロピルアミン11.5gをゆっくりと滴下し、室温まで昇温後20時間撹拌した。トルエン70gを加え目的物を有機層に抽出した。硫酸ナトリウムで脱水、ろ過を行い、1-イソプロピルイミノ-2,3-ジメチル2-ブタノールのトルエン溶液(3.19質量%)を得た。減圧下オイルバス90℃にて溶媒を留去し、アルコール化合物No.167を得た。
(1)GC-MS m/z: 157(M+)
(3)元素分析 C:69.0質量%、H:11.9質量%、O:10.6質量%、N:8.8質量%(理論値;C:68.7質量%、H:12.2質量%、O:10.2質量%、N:8.9質量%)
200ml4つ口フラスコに塩化コバルト(II)を4.04g、テトラヒドロフラン16gを仕込み、室温下で撹拌した。その中に、アルコール化合物No.134(3-メチルイミノメチル-3-ペンタノール)より調製して得たナトリウムアルコキシド8.77gをテトラヒドロフラン17gで希釈した溶液を氷冷下で滴下した。滴下終了後、室温下で16時間撹拌し、ろ過を行った。得られたろ液からテトラヒドロフランを除去し、残渣を60Pa、130℃の条件下で蒸留して、アルコキシド化合物No.43を収量1.34g、収率14.5%で得た。
(1)減圧TG-DTA
質量50%減少温度:136.2℃(10トール、Ar流量:50ml/分、昇温10℃/分)
(2)元素分析 Co:18.4質量%、C:53.6質量%、H:8.7質量%、O:10.6質量%、N:8.6質量%(理論値;Co:18.7質量%、C:53.3質量%、H:9.0質量%、O:10.1質量%、N:8.9質量%)
200ml4つ口フラスコに塩化コバルト(II)を13.23g、テトラヒドロフラン48gを仕込み、室温下で撹拌した。その中に、アルコール化合物No.140(3-エチルイミノメチル-3-ペンタノール)より調製して得たナトリウムアルコキシド33.04gをテトラヒドロフラン50gで希釈した溶液を氷冷下で滴下した。滴下終了後、室温下で22時間撹拌し、ろ過を行った。得られたろ液からテトラヒドロフランを除去し、残渣を40Pa、125℃の条件下で蒸留して、アルコキシド化合物No.49を収量28.70g、収率83.5%で得た。得られたアルコキシド化合物No.49の単結晶X線構造解析の結果を図5に示す。
(1)減圧TG-DTA
質量50%減少温度:125.8℃(10トール、Ar流量:50ml/分、昇温10℃/分)
(2)元素分析 Co:16.5質量%、C:56.3質量%、H:9.5質量%、O:9.8質量%、N:7.9質量%(理論値;Co:17.2質量%、C:56.0質量%、H:9.4質量%、O:9.3質量%、N:8.2質量%)
200ml4つ口フラスコに塩化コバルト(II)を5.75g、テトラヒドロフラン18gを仕込み、室温下で撹拌した。その中に、アルコール化合物No.146(3-イソプロピルイミノメチル-3-ペンタノール)より調製して得たナトリウムアルコキシド15.06gをテトラヒドロフラン17gで希釈した溶液を氷冷下で滴下した。滴下終了後、室温下で29時間撹拌し、ろ過を行った。得られたろ液からテトラヒドロフランを除去し、残渣を50Pa、135℃の条件下で蒸留して、アルコキシド化合物No.55を収量5.53g、収率35.1%で得た。
(1)減圧TG-DTA
質量50%減少温度:130.3℃(10トール、Ar流量:50ml/分、昇温10℃/分)
(2)元素分析 Co:15.0質量%、C:59.0質量%、H:9.7質量%、O:8.9質量%、N:7.5質量%(理論値;Co:15.9質量%、C:58.2質量%、H:9.8質量%、O:8.6質量%、N:7.5質量%)
100ml3つ口フラスコに塩化コバルト(II)1.52gおよびテトラヒドロフラン8.22gを仕込み、室温下で撹拌した。その中に、アルコール化合物No.166(1-エチルイミノ-2,3-ジメチル-2-ブタノール)より調製して得たナトリウムアルコキシド3.80gをテトラヒドロフラン7.95gで希釈した溶液を氷冷下で滴下した。滴下終了後、室温下で15時間撹拌し、ろ過を行った。得られたろ液からテトラヒドロフランを除去し、残渣を45Pa、バス温度130℃、塔頂温度90℃の条件下で蒸留して、アルコキシド化合物No.75を収量1.56g、収率39.3%で得た。
(1)減圧TG-DTA
質量50%減少温度:123℃(10トール、Ar流量:50ml/分、昇温10℃/分)
(2)元素分析 Co:16.9質量%、C:56.2質量%、H:9.2質量%、O:9.7質量%、N:8.3質量%(理論値;Co:17.2質量%、C:56.0質量%、H:9.4質量%、O:9.3質量%、N:8.2質量%)
アルゴンガス雰囲気下、銅(II)メトキシド0.59gに、アルコール化合物No.134(3-メチルイミノメチル-3-ペンタノール)の3.8質量%トルエン溶液32gを滴下した。すぐに溶解して紫色を呈し、そのまま室温下で20時間撹拌した。オイルバス温度70℃、微減圧下でトルエンを留去し、次いでオイルバス温度90℃、減圧下で残留するトルエンを完全に留去した。得られた紫色固体を100℃、40Paで蒸留して目的物を得た。得られた化合物は融点60℃の固体であった。化合物の収率は70%であった。得られた化合物について、単結晶X線構造解析を行った。図6に単結晶X線構造解析により得られた分子構造を示す。この結果から、得られた化合物がアルコキシド化合物No.171であることが確認できた。
(1)減圧TG-DTA
質量50%減少温度:120℃(10トール、Ar流量:50ml/分、昇温10℃/分)
(2)元素分析 Cu:19.7質量%、C:52.4質量%、H:8.9質量%、O:10.7質量%、N:8.4質量%(理論値;Cu:19.9質量%、C:52.6質量%、H:8.8質量%、O:10.0質量%、N:8.8質量%)
アルゴンガス雰囲気下、銅(II)メトキシド0.62gに、アルコール化合物No.140(3-エチルイミノメチル-3-ペンタノール)の3.7質量%トルエン溶液38gを滴下した。すぐに溶解して紫色を呈し、そのまま室温下で18時間撹拌した。オイルバス温度70℃、微減圧下でトルエンを留去し、次いでオイルバス温度90℃、減圧下で残留するトルエンを完全に留去した。得られた紫色液体を100℃、40Paで蒸留して紫色液体であるアルコキシド化合物No.172を得た。アルコキシド化合物No.172の収率は45%であった。
(1)減圧TG-DTA
質量50%減少温度:120℃(10トール、Ar流量:50ml/分、昇温10℃/分)
(2)元素分析 Cu:18.4質量%、C:54.9質量%、H:8.8質量%、O:9.0質量%、N:8.2質量%(理論値;Cu:18.3質量%、C:55.2質量%、H:9.3質量%、O:9.2質量%、N:8.1質量%)
500ml4つ口フラスコにヘキサアンミンニッケル(II)塩化物を4.97g、テトラヒドロフラン95gを仕込み、室温下で撹拌した。その中に、アルコール(3-エチルイミノメチル-3-ペンタノール)の17.2質量%トルエン溶液36.0gより調製して得たナトリウムアルコキシドをテトラヒドロフラン180gで希釈した溶液を、氷冷下で滴下した。滴下終了後、70℃加熱下で撹拌した後、テトラヒドロフラン、トルエンを除去した。この残渣をヘキサンに溶解させ、ろ過を行った。得られたろ液からヘキサンを除去し、残渣を25Pa、100℃の条件下で精製して、化合物No.221物を収量2.80g、収率37.8%で得た。
(1)減圧TG-DTA
質量50%減少温度:134℃(10トール、Ar流量:50ml/分、昇温10℃/分)
(2)元素分析 Ni:17.3質量%、C:56.2質量%、H:9.2質量%、O:9.2質量%、N:8.0質量%(理論値;Ni:17.10質量%、C:56.01質量%、H:9.40質量%、O:9.33質量%、N:8.16質量%)
(3)1NMR(溶媒:重ベンゼン)(ケミカルシフト:多重度:H数)
(6.877:s:2)(2.745~2.797:q:4)(1.328~1.386:m:8)(1.229~1.266:t:12)(1.147~1.182:t:6)
200ml4つ口フラスコにヘキサアンミンニッケル(II)塩化物を6.88g、テトラヒドロフラン42.8gを仕込み、室温下で撹拌した。その中に、アルコール(1-エチルイミノ-2,3-ジメチル-2-ブタノール)より調製して得たナトリウムアルコキシド9.80gをテトラヒドロフラン42.8gで希釈した溶液を氷冷下で滴下した。滴下終了後、室温下で14時間撹拌した。2時間過熱還流を行い、室温まで放冷ののち、減圧下テトラヒドロフランを留去した。得られた残渣にヘキサン65gを加え、ろ過を行った。得られたろ液からヘキサンを留去し、残渣を50Pa、100℃の条件下で蒸留して、化合物No.247を収量2.50g、収率30.7%で得た。
(1)減圧TG-DTA
質量50%減少温度:132.9℃(10トール、Ar流量:50ml/分、昇温10℃/分)
(2)1NMR(溶媒:重ベンゼン)(ケミカルシフト:多重度:H数)
(7.030:d:2)(2.932~2.593:m:4)(1.605~1.509:m:2)(1.661:dd:12)(1.084~1.117:m:12)
(3)元素分析 Ni:17.2質量%、C:56.3質量%、H:9.0質量%、O:9.3質量%、N:7.9質量%(理論値;Ni:17.1質量%、C:56.0質量%、H:9.40質量%、O:9.33質量%、N:8.16質量%)
アルコキシド化合物No.43、49、55、75、171、172、221及び247について、大気中で放置することで自然発火性の有無を確認した。結果を表1に示す。
アルコキシド化合物No.43、49、55、75、171、172、221、247並びに以下に示す比較化合物1~6について、DSC測定装置を用いて熱分解開始温度を測定した。結果を表2に示す。
アルコキシド化合物No.43、49、55及び75を化学気相成長用原料とし、図2に示す装置を用いて以下の条件のALD法により、シリコンウエハ上に金属コバルト薄膜を製造した。得られた薄膜について、X線反射率法による膜厚測定、X線回折法及びX線光電子分光法による薄膜構造及び薄膜組成の確認を行ったところ、膜厚は2~4nmであり、膜組成は金属コバルト(XPS分析によるCo2pピークで確認)であり、炭素含有量は検出下限である0.1atom%よりも少なかった。1サイクル当たりに得られる膜厚は、0.02~0.04nmであった。
反応温度(基板温度);300℃、反応性ガス;水素ガス
(工程)
下記(1)~(4)からなる一連の工程を1サイクルとして、100サイクル繰り返した。
(1)気化室温度:110℃、気化室圧力50Paの条件で気化させた化学気相成長用原料の蒸気を導入し、系圧50Paで30秒間堆積させる。
(2)5秒間のアルゴンパージにより、未反応原料を除去する。
(3)反応性ガスを導入し、系圧力50Paで30秒間反応させる。
(4)5秒間のアルゴンパージにより、未反応原料を除去する。
アルコキシド化合物No.171及び172を化学気相成長用原料とし、図3に示すプラズマ成膜装置を用いて以下の条件のPEALD法により、シリコンウエハ上に金属銅薄膜を製造した。得られた薄膜について、X線反射率法による膜厚測定、X線回折法及びX線光電子分光法による薄膜構造及び薄膜組成の確認を行ったところ、膜厚は2~4nmであり、膜組成は金属銅(XPS分析によるCu2pピークで確認)であり、炭素含有量は検出下限である0.1atom%よりも少なかった。1サイクル当たりに得られる膜厚は、0.02~0.04nmであった。
反応温度(基板温度);60℃、反応性ガス;水素ガス、プラズマ出力;50W
(工程)
下記(1)~(4)からなる一連の工程を1サイクルとして、100サイクル繰り返した。
(1)原料容器加熱温度:60℃、原料容器内圧力50Paの条件で気化させた化学気相成長用原料の蒸気を導入し、系圧50Paで30秒間堆積させる。
(2)5秒間のアルゴンパージにより、未反応原料を除去する。
(3)反応性ガスとプラズマを導入し、系圧力50Paで30秒間反応させる。
(4)5秒間のアルゴンパージにより、未反応原料を除去する。
アルコキシド化合物No.221及び247を各々化学気相成長用原料とし、図1に示す装置を用いて以下の条件の熱ALD法により、シリコンウエハ上に金属ニッケル薄膜を製造した。得られた薄膜について、X線反射率法による膜厚測定、X線回折法及びX線光電子分光法による薄膜構造及び薄膜組成の確認を行ったところ、どちらも膜厚は20~40nmであり、膜組成は金属ニッケル(XPS分析によるNi2pピークで確認)であり、炭素および窒素含有量は検出下限である0.1atom%よりも少なかった。1サイクル当たりに得られる膜厚は、0.02~0.04nmであった。
反応温度(基板温度);230℃、反応性ガス;水素ガス
(工程)
下記(1)~(4)からなる一連の工程を1サイクルとして、1000サイクル繰り返した。
(1)気化室温度:70℃、気化室圧力50Paの条件で気化させた化学気相成長用原料の蒸気を導入し、系圧50Paで30秒間堆積させる。
(2)5秒間のアルゴンパージにより、未反応原料を除去する。
(3)反応性ガスを導入し、系圧力50Paで30秒間反応させる。
(4)5秒間のアルゴンパージにより、未反応原料を除去する。
アルコキシド化合物No.221及び247を各々化学気相成長用原料とし、図3に示すプラズマ成膜装置を用いて以下の条件のPEALD法により、シリコンウエハ上に金属ニッケル薄膜を製造した。得られた薄膜について、X線反射率法による膜厚測定、X線回折法及びX線光電子分光法による薄膜構造及び薄膜組成の確認を行ったところ、どちらも膜厚は50~70nmであり、膜組成は金属銅(XPS分析によるNi2pピークで確認)であり、炭素および窒素含有量は検出下限である0.1atom%よりも少なかった。1サイクル当たりに得られる膜厚は、0.05~0.07nmであった。
反応温度(基板温度);70℃、反応性ガス;水素ガス、プラズマ出力;50W
(工程)
下記(1)~(4)からなる一連の工程を1サイクルとして、1000サイクル繰り返した。
(1)原料容器加熱温度:70℃、原料容器内圧力50Paの条件で気化させた化学気相成長用原料の蒸気を導入し、系圧50Paで30秒間堆積させる。
(2)5秒間のアルゴンパージにより、未反応原料を除去する。
(3)反応性ガスとプラズマを導入し、系圧力50Paで30秒間反応させる。
(4)5秒間のアルゴンパージにより、未反応原料を除去する。
Claims (5)
- 下記一般式(I)で表されるアルコキシド化合物。
Lは、水素原子、ハロゲン原子、水酸基、アミノ基、アジ基、ホスフィド基、ニトリル基、カルボニル基、炭素原子数1~12の炭化水素基又は下記一般式(L-1)~(L-13)で表される基を表す。Mは、金属原子又はケイ素原子を表し、nは1以上の整数を表し、mは0以上の整数を表し、n+mは、Mで表される金属原子又はケイ素原子の価数を表す。)
- 上記一般式(I)において、Mが銅、鉄、ニッケル、コバルト又はマンガンである、請求項1に記載のアルコキシド化合物。
- 請求項1又は2に記載のアルコキシド化合物を含有してなる薄膜形成用原料。
- 請求項3に記載の薄膜形成用原料を気化させて得られるアルコキシド化合物を含有する蒸気を、基体が設置された成膜チャンバー内に導入し、該アルコキシド化合物を分解及び/又は化学反応させて該基体の表面に金属原子及びケイ素原子から選ばれる少なくとも1種の原子を含有する薄膜を形成する薄膜の形成方法。
Priority Applications (7)
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KR1020167035931A KR102415479B1 (ko) | 2014-08-05 | 2015-07-16 | 알콕사이드 화합물, 박막 형성용 원료, 박막의 형성방법 및 알코올 화합물 |
CN201580040201.7A CN106660946B (zh) | 2014-08-05 | 2015-07-16 | 醇盐化合物、薄膜形成用原料、薄膜的形成方法和醇化合物 |
US15/318,755 US10011623B2 (en) | 2014-08-05 | 2015-07-16 | Alkoxide compound, thin film-forming starting material, and thin film formation method |
JP2016540139A JP6662779B2 (ja) | 2014-08-05 | 2015-07-16 | アルコキシド化合物、薄膜形成用原料、薄膜の形成方法及びアルコール化合物 |
EP15829762.2A EP3178808A4 (en) | 2014-08-05 | 2015-07-16 | Alkoxide compound, thin film-forming starting material, thin film formation method and alcohol compound |
IL249717A IL249717B (en) | 2014-08-05 | 2016-12-22 | Alkoxide compound, starting material for forming a thin layer, method for forming a thin layer and alcohol compound |
US15/996,693 US20180282358A1 (en) | 2014-08-05 | 2018-06-04 | Alkoxide compound, thin film-forming starting material, thin film formation method, and alcohol compound |
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US15/318,755 A-371-Of-International US10011623B2 (en) | 2014-08-05 | 2015-07-16 | Alkoxide compound, thin film-forming starting material, and thin film formation method |
US15/996,693 Division US20180282358A1 (en) | 2014-08-05 | 2018-06-04 | Alkoxide compound, thin film-forming starting material, thin film formation method, and alcohol compound |
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JP (1) | JP6662779B2 (ja) |
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- 2015-07-16 CN CN201580040201.7A patent/CN106660946B/zh active Active
- 2015-07-16 EP EP15829762.2A patent/EP3178808A4/en active Pending
- 2015-07-16 US US15/318,755 patent/US10011623B2/en active Active
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Also Published As
Publication number | Publication date |
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CN106660946B (zh) | 2019-07-23 |
IL249717B (en) | 2020-06-30 |
EP3178808A4 (en) | 2018-03-21 |
CN106660946A (zh) | 2017-05-10 |
TWI668203B (zh) | 2019-08-11 |
JPWO2016021385A1 (ja) | 2017-05-18 |
KR20170041660A (ko) | 2017-04-17 |
US20180282358A1 (en) | 2018-10-04 |
KR102415479B1 (ko) | 2022-06-30 |
EP3178808A1 (en) | 2017-06-14 |
US10011623B2 (en) | 2018-07-03 |
JP6662779B2 (ja) | 2020-03-11 |
TW201619126A (zh) | 2016-06-01 |
IL249717A0 (en) | 2017-02-28 |
US20170129912A1 (en) | 2017-05-11 |
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