WO2010103893A1 - 金属含有薄膜の製造方法における残存水分子除去プロセス及びパージソルベント - Google Patents
金属含有薄膜の製造方法における残存水分子除去プロセス及びパージソルベント Download PDFInfo
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- WO2010103893A1 WO2010103893A1 PCT/JP2010/052199 JP2010052199W WO2010103893A1 WO 2010103893 A1 WO2010103893 A1 WO 2010103893A1 JP 2010052199 W JP2010052199 W JP 2010052199W WO 2010103893 A1 WO2010103893 A1 WO 2010103893A1
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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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- 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
- H01L21/28562—Selective deposition
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- 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
- C23C16/4401—Means for minimising impurities, e.g. dust, moisture or residual gas, in the reaction chamber
- C23C16/4402—Reduction of impurities in the source gas
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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
- C23C16/448—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 generating reactive gas streams, e.g. by evaporation or sublimation of precursor materials
- C23C16/4481—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 generating reactive gas streams, e.g. by evaporation or sublimation of precursor materials by evaporation using carrier gas in contact with the source material
- C23C16/4482—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 generating reactive gas streams, e.g. by evaporation or sublimation of precursor materials by evaporation using carrier gas in contact with the source material by bubbling of carrier gas through liquid source material
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- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/44—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating
- C23C16/455—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating characterised by the method used for introducing gases into reaction chamber or for modifying gas flows in reaction chamber
- C23C16/45523—Pulsed gas flow or change of composition over time
- C23C16/45525—Atomic layer deposition [ALD]
- C23C16/45527—Atomic layer deposition [ALD] characterized by the ALD cycle, e.g. different flows or temperatures during half-reactions, unusual pulsing sequence, use of precursor mixtures or auxiliary reactants or activations
- C23C16/45534—Use of auxiliary reactants other than used for contributing to the composition of the main film, e.g. catalysts, activators or scavengers
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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
- C23C16/52—Controlling or regulating the coating process
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- H10P14/42—
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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
- H01L21/28008—Making conductor-insulator-semiconductor electrodes
- H01L21/28017—Making conductor-insulator-semiconductor electrodes the insulator being formed after the semiconductor body, the semiconductor being silicon
- H01L21/28158—Making the insulator
- H01L21/28167—Making the insulator on single crystalline silicon, e.g. using a liquid, i.e. chemical oxidation
- H01L21/28194—Making the insulator on single crystalline silicon, e.g. using a liquid, i.e. chemical oxidation by deposition, e.g. evaporation, ALD, CVD, sputtering, laser deposition
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D1/00—Resistors, capacitors or inductors
- H10D1/60—Capacitors
- H10D1/68—Capacitors having no potential barriers
- H10D1/682—Capacitors having no potential barriers having dielectrics comprising perovskite structures
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- H10D64/01342—
Definitions
- the present invention relates to a process for removing residual water molecules in a system by using a gas obtained by vaporizing a purge solvent, which is applied in a method for producing a metal-containing thin film, and a purge solvent used in the process.
- Metal oxide thin film is an electronic member for electronic components such as high dielectric capacitors, ferroelectric capacitors, gate films, barrier films, and gate insulating films, and optical members for optical communication devices such as optical waveguides, optical switches, and optical amplifiers. It is used as.
- Examples of the method for producing the thin film include a MOD method such as a coating pyrolysis method and a sol-gel method, a CVD method, an ALD method, etc., which are excellent in composition controllability and step coverage, suitable for mass production, hybrid Since it has many advantages such as being able to be integrated, a method of vaporizing a precursor such as a CVD method or an ALD method is an optimal manufacturing method.
- a MOD method such as a coating pyrolysis method and a sol-gel method
- a CVD method, an ALD method, etc. which are excellent in composition controllability and step coverage, suitable for mass production, hybrid Since it has many advantages such as being able to be integrated, a method of vaporizing a precursor such as a CVD method or an ALD method is an optimal manufacturing method.
- Patent Document 1 uses a ⁇ -diketone complex as a precursor and oxygen-containing radicals such as water vapor, oxygen, hydrogen peroxide, and peracetic acid as a reactive gas.
- oxygen-containing radicals such as water vapor, oxygen, hydrogen peroxide, and peracetic acid as a reactive gas.
- Patent Document 2 discloses a film forming method capable of forming a thin film of a compound such as BST, STO, (Ti, Al) N, Ta—Ti—O in a batch system using the ALD method.
- Patent Documents 3 and 4 disclose the production of a metal oxide thin film using a metal amide compound.
- Patent Document 5 discloses a method for manufacturing a conductive structure including a step of forming a barrier metal film using an ALD method or the like, and subsequently purifying the barrier metal film using argon gas and TiCl 4 gas. Yes.
- the ALD method is used to supply reactive gases such as H 2 O, NH 3 , O 2 , O 3 , purge by vacuum exhaust, supply of metal source gas, purge by vacuum exhaust, H 2 O, NH 3 , O again. Since the film formation is performed in units of atomic layers by repeating the sequence of supplying reactive gases such as 2 and O 3 multiple times, the film formation time tends to be long and not suitable for mass production. In particular, when a plurality of types of metal source gases are used, it is necessary to control the composition in a multi-component system in order to suppress the interaction between the metal source gases. In this case, the purge time due to vacuum evacuation or the like becomes long.
- water vapor is preferable as an oxidant in the production of a high dielectric film because it has high reactivity with a thin film precursor and has few impurities such as residual carbon.
- the problem to be solved by the present invention is to efficiently remove residual water molecules in the system and shorten the purge time when a metal-containing thin film is produced by the ALD method or the like.
- the present invention is a residual water molecule removal process applied in a method for producing a metal-containing thin film that forms a metal-containing thin film on a substrate, and the remaining water molecules by using a gas obtained by vaporizing a purge solvent.
- the present invention also provides a purge solvent that is preferably used in the above-described process, and is composed of an organic solvent or an organic solvent composition having a water content of 20% by mass or more in the azeotropic composition. .
- the present invention when a metal-containing thin film is produced by an ALD method or the like, residual water molecules in the system can be efficiently removed, so that the metal-containing thin film is efficiently produced by reducing the film formation time. be able to.
- FIG. 1 is a schematic diagram showing an apparatus used in the embodiment.
- the process of the present invention which is a method for removing residual water molecules, is applied to a method for forming a metal-containing thin film including a step of using water or water vapor or generating water as a reaction product.
- a metal-containing thin film manufacturing method by a chemical vapor deposition technique such as a MOD method such as a coating pyrolysis method or a sol-gel method, a CVD method or an ALD method. It can be suitably used for the method.
- ALD method incorporating the process of the present invention is described below.
- a thin film forming raw material hereinafter also simply referred to as a raw material
- a reactive gas is alternately supplied to a deposition part, and this is used as one cycle to form a desired thin film molecule.
- Deposit layers in stages.
- the raw material for forming a thin film contains a metal compound described later as a precursor. If necessary, a plurality of raw materials containing different precursors can be used in combination. When a plurality of raw materials are used in combination, each raw material is sequentially supplied to the deposition section independently, and finally a reactive gas is supplied, which is one cycle.
- the above-described one cycle includes (1) a step of introducing and adsorbing vapor obtained by vaporizing the raw material at a high temperature onto the substrate, (2) A step of introducing water vapor, which is a reactive gas, onto a substrate and reacting with a raw material to grow and deposit a thin film on the substrate; (3) a reaction system by introducing a gas in which a purge solvent is vaporized into the reaction system. It consists of a process of removing water molecules inside. In each cycle, purging with an inert gas and / or exhausting with reduced pressure is performed between (1) and (2), between (2) and (3), and between (3) and (1).
- a step of removing unreacted source gas, reactive gas or purge solvent gas may be optionally introduced.
- the method for transporting and supplying raw materials, the deposition method, the production conditions, the production equipment, etc. and well-known general conditions and methods can be used.
- the ALD method has a feature that a thin and uniform thin film can be obtained.
- ALD can also be used in combination with heat, light, and plasma.
- “(3) the step of removing water molecules in the reaction system by introducing the gas vaporized from the purge solvent into the reaction system” is the water molecule removing step by the process of the present invention. More specifically, water molecules remain in the reaction system before the step (3) by the step (2). Even when the step of (2) is followed by a step of removing water vapor by purging with an inert gas and / or evacuation by decompression, water molecules in the reaction system are not completely removed but remain. Water molecules are particularly likely to remain on the walls and pipes. In this way, the gas in which the purge solvent is vaporized in the step (3) is introduced into the system in which water molecules remain, whereby the gas is circulated and purged in the system.
- the water molecules remaining in the system are discharged from the system together with the gas vaporizing the purge solvent, and the water molecules are removed. From the viewpoint of removing water molecules more efficiently, purging with an inert gas and / or evacuation with reduced pressure is performed between the step (3) and the step (1) of the next cycle. It is preferable to carry out the removing step.
- the step (3) it is only necessary to replace the inside of the system with a gas obtained by vaporizing the purge solvent, and there are no particular limitations on the gas introduction method and conditions.
- the gas vaporized from the purge solvent can be introduced, for example, by the same method as that for purging with a normal inert gas.
- the temperature it is preferable to keep the inside of the system in the range of 80 to 120 ° C. from the viewpoint of efficiently removing water molecules. In the ALD method, since the inside of the system is heated in the steps (1) and (2), this temperature range can often be satisfied without special temperature control.
- the process of the present invention can be applied not only to the removal of residual water molecules in the reaction system for depositing a thin film, but also to the removal of residual water molecules in a pipe through which water vapor as a reactive gas is circulated.
- thin film manufacturing methods other than the ALD method can also be applied according to the above.
- the purge solvent can be vaporized by means such as heat, carrier gas, or reduced pressure.
- the heating temperature can be appropriately selected depending on the type of purge solvent, but is preferably in the range of 50 to 200 ° C.
- Vaporization with the carrier gas can be performed by bubbling the carrier gas to the purge solvent.
- the carrier gas bubbled into the purge solvent can be introduced into the system as it is.
- the carrier gas include nitrogen and rare gases (helium, neon, argon, xenon) and the like.
- the flow rate of the carrier gas is preferably 0.1 to 1.5 slm.
- the pressure can be appropriately selected depending on the type of purge solvent, but is preferably in the range of 1 to 10 Pa.
- an organic solvent or an organic solvent composition can be used.
- the organic solvent is not particularly limited, and a well-known general organic solvent can be used. Examples thereof include ketone solvents such as methyl ethyl ketone, methyl amyl ketone, diethyl ketone, acetone, methyl isopropyl ketone, methyl isobutyl ketone, and cyclohexanone; Ether solvents such as ether, propyl ether, dioxane, tetrahydrofuran, 1,2-dimethoxyethane, 1,2-diethoxyethane, dipropylene glycol dimethyl ether; methyl acetate, ethyl acetate, acetic acid-n-propyl, isopropyl acetate, acetic acid ester solvents such as n-butyl; cellsolve solvents such as ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, propylene
- organic solvents can be used as an organic solvent composition by mixing two or more kinds.
- these organic solvents and organic solvent compositions those that are easily gasified, those that have high fluidity, those that do not decompose even at a high temperature of 300 ° C. or higher, and those that easily azeotrope with water are preferable.
- an organic solvent or an organic solvent composition having a water content of 20% by mass or more in the azeotropic composition is more preferable because of its high dehydrating ability.
- the water content in the azeotropic composition is more preferably 30% by mass or more.
- the upper limit of the water content in the azeotropic composition is not particularly limited, but is usually about 99.9% by mass at most.
- the organic solvent alcohol solvents are preferable, and 1-butanol and 1-pentanol are more preferable because the water content in the azeotropic composition is 20% by mass or more and the dehydrating ability is high.
- the organic solvent composition is a hydrocarbon solvent, particularly a hydrocarbon solvent in which the alcohol solvent content in the azeotropic composition with the alcohol solvent is 20% by mass or more. It is preferable to use a solvent, particularly toluene or xylene, because it can prevent the alcohol-based solvent from remaining on the piping and wall surfaces.
- the content of the alcohol solvent in the organic solvent composition is preferably 1 to 99.9% by mass.
- the content of the alcohol solvent in the organic solvent composition is 20 to 50% by mass, and the content of the hydrocarbon solvent is 50 to 80% by mass. % Is preferred.
- the thing of the following compositions is mentioned, for example. (Composition 1) Ketone solvent 20-40% by mass Hydrocarbon solvent 60-80% by mass (Composition 2) Alcohol solvent 20-50% by mass Ether solvent 1-20% by mass Hydrocarbon solvent 30-79% by mass
- ester solvents have an azeotropic property with water, but this is not preferable because the residual solvent may react with the raw material or thermally decompose.
- the water content is preferably 10 ppm or less, more preferably 1 ppm or less.
- impurities such as impurity metal elements, chlorine and other impurity halogens, and organic impurities should be avoided as much as possible.
- the impurity metal element content is preferably 100 ppb or less and more preferably 10 ppb or less for each element.
- the total amount is preferably 1 ppm or less, and more preferably 100 ppb or less.
- metal oxides, complex metal oxides with silicon, nitrides, nitride oxides with silicon, etc. are used as LSI gate insulating films, gate films, and barrier layers, the electrical characteristics of the resulting electrothin film are affected.
- 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 even more preferably 10 ppm or less.
- the purge solvent has 100 particles larger than 0.3 ⁇ m in the particle measurement by the light scattering liquid particle detector in the liquid phase in order to reduce or prevent particle contamination of the manufactured thin film.
- the number of particles larger than 0.2 ⁇ m is preferably 1000 or less in 1 ml of the liquid phase, and the number of particles larger than 0.2 ⁇ m is 100 or less in 1 ml of the liquid phase. More preferably.
- the thin film forming raw material used in the CVD method or ALD method incorporating the process of the present invention contains a metal compound as a thin film precursor.
- a raw material can take the form of a metal compound itself or a solution in which the metal compound is dissolved in an organic solvent.
- the form is appropriately selected according to a method such as a transportation supply method in the thin film manufacturing method used.
- the concentration of the raw material is not particularly limited, and any concentration may be used as long as it can provide a stable solution, and is appropriately selected depending on the amount of raw material transported, the film formation rate during thin film production, and the like.
- the concentration is less than 0.05 mol / liter, the metal source supply stability may be reduced, and the film forming rate may be reduced.
- the metal compound concentration is preferably in the range of 0.05 to 0.5 mol / liter.
- the metal atom constituting the metal compound is not particularly limited, and any metal atom can be selected so that a desired oxide or composite oxide can be constituted.
- the metal atoms include group 1 elements such as lithium, sodium, potassium, rubidium and cesium, group 2 elements such as beryllium, magnesium, calcium, strontium and barium, scandium, yttrium and lanthanoid elements (lanthanum, cerium, praseodymium, Neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium), group 3 elements such as actinoid elements, titanium, zirconium, hafnium group 4 elements, vanadium, niobium, tantalum 5 Group elements, chromium, molybdenum, tungsten group 6 elements, manganese, technetium, rhenium group 7 elements, iron, ruthenium, osmium group 8 elements, cobalt, rhodium Group 9 element of iridium, Group 10 element of nickel,
- the metal compound is not particularly limited as long as it has volatility that can be used in a thin film manufacturing method such as the ALD method.
- the ligand that forms a metal compound by combining with the above metal atoms include halides such as chlorine, bromine and iodine, alkanes such as methane, ethane, propane, 2-propane and butane; monomethylamine, monoethylamine, mono Monoalkylamines such as butylamine; Dialkylamines such as dimethylamine, diethylamine, ethylmethylamine, dipropylamine, diisopropylamine, dibutylamine, and ditertbutylamine; Silylamines such as trimethylsilylamine and triethylsilylamine; Methanimine, Ethanimine, Propane Alkaneimines such as imine, 2-propaneimine, butaneimine, 2-butaneimine, isobutaneimine, tert
- the metal compound having the above alcohol and / or ⁇ -diketone as a ligand the metal compound represented by the following general formula (I) or the following general formula (II) as a ligand having an alcohol
- examples of compounds having alcohol and ⁇ -diketone as a ligand include metal compounds represented by the following general formula (III) or formula (IV), and having ⁇ -diketone as a ligand
- a metal compound represented by the following general formula (V) may be mentioned, and a compound in which the maximum number of ligands capable of coordination is coordinated is usually used.
- M and M ′ represent a metal atom
- R 1 may be branched, interrupted with an oxygen atom or a nitrogen atom, or substituted with a halogen atom.
- m represents the valence of the metal
- n represents the sum of the valences of the metal M and the metal M ′ in the molecule
- m , N is 2 or more
- R 1 may be the same or different.
- M represents a metal atom
- R 1 represents the same group as in the general formula (I)
- R 2 and R 3 may be branched and interrupted by an oxygen atom or a nitrogen atom.
- p and q each represents an integer of 1 or more in which p + q is a valence of a metal.
- M represents a metal atom
- R 2 and 3 represent the same group as in the general formula (III)
- R represents an alkanediyl group having 2 to 18 carbon atoms which may have a branch
- r and x Represents an integer of 1 or more in which (r + 2x) is the valence of the metal.
- M represents a metal atom
- R 2 and R 3 represent the same group as in the general formula (III)
- y represents the valence of the metal
- y is 2 or more, R 2 and R 3 may be the same or different.
- the alkyl group include methyl, ethyl, propyl, isopropyl, butyl, sec-butyl, tert-butyl, isobutyl, amyl, isoamyl, tert-amyl, hexyl, 1-ethylpentyl, cyclohexyl, 1-methylcyclohexyl, heptyl, isoheptyl , Tertiary heptyl, n-octyl, isooctyl, tertiary octyl, 2-ethylhexyl, trifluoromethyl, perfluoropropyl, perfluorohexyl, 2-methoxyethyl, 2-ethoxyethy
- a carbon atom which may be branched by R 2 and R 3 may be interrupted by an oxygen atom or a nitrogen atom, or may be substituted by a halogen atom
- Examples of the alkyl group having 1 to 12 include the same groups as those described above for R 1 .
- the alkanediyl group having 2 to 18 carbon atoms represented by R is a group given by glycol.
- 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-2,4-pentanediol and the like.
- the metal compound having the above dialkylamine as a ligand the following compound No. 1 to 9 may be mentioned.
- the raw material is vaporized by heating and / or decompressing in the raw material container, and introduced into the deposition reaction section together with a carrier gas such as argon, nitrogen, and helium used as necessary.
- a carrier gas such as argon, nitrogen, and helium used as necessary.
- a gas transport method or a liquid transport method in which a raw material is transported to a vaporization chamber in a liquid or solution state, vaporized by heating and / or decompressing in the vaporization chamber, and introduced into a deposition reaction part.
- the metal compound itself is a raw material
- the metal compound itself or a solution obtained by dissolving the metal compound in an organic solvent is the raw material.
- the raw material is vaporized and supplied independently for each component (hereinafter sometimes referred to as a single source method), and the multicomponent raw material is mixed in advance with a desired composition.
- a method of vaporizing and supplying a mixed raw material hereinafter, sometimes referred to as a cocktail sauce method.
- a raw material is a mixture of only a plurality of kinds of metal compounds or a mixed solution obtained by adding an organic solvent to these mixtures.
- a compound having a similar reaction or decomposition behavior in which the precursor changes to a thin film composition is preferable as the plurality of metal compounds (precursors) used in the production of the multicomponent thin film.
- a compound reactive to the formed molecular layer is preferable.
- a method that does not cause alteration due to a chemical reaction during mixing is preferable.
- the organic solvent used in the above raw material is not particularly limited and can be a well-known general organic solvent that does not react with a metal compound.
- the organic solvent include alcohols such as methanol, ethanol, 2-propanol and n-butanol; acetates such as ethyl acetate, butyl acetate and methoxyethyl acetate; ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene Ether alcohols such as glycol monobutyl ether; ethers such as tetrahydrofuran, tetrahydropyran, morpholine, ethylene glycol dimethyl ether, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, dibutyl ether, dioxane; methyl butyl ketone, methyl isobutyl ketone, ethyl butyl ketone, di Propyl ketone, diisobutyl ketone,
- the boiling point and flash point, etc. it can be used alone or as a mixture of two or more.
- the total amount of the metal compound components of the present invention in the organic solvent is 0.01 to 2.0 mol / liter, particularly 0.05 to 1.0 mol / liter. It is preferable to do this.
- the above raw materials may contain a nucleophilic reagent as needed to impart stability to the metal compound.
- the nucleophilic reagent include ethylene glycol ethers such as glyme, diglyme, triglyme and 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 and triethoxytriethyleneamine, cyclic polyamines such as cyclam and cyclen, pyridine, pyrrolidine and piperi And heterocyclic compounds such as gin, morpholine, N-methylpyrrolidine, N-methylpiperidine, N-methylmorpholine, tetrahydrofuran, tetrahydropyran, 1,4-dioxane, oxazole, thiazole, oxathiolane, and the like.
- the amount of the nucleophilic reagent used is usually in the range of 0.05 to 10 mo
- the above raw materials should contain as little impurities metal elements as possible, impurities such as chlorine and impurities, and organic impurities as much as possible.
- the impurity metal element content is preferably 100 ppb or less and more preferably 10 ppb or less for each element.
- the total amount is preferably 1 ppm or less, and 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, preferably 50 ppm or less, and more preferably 10 ppm or less.
- the water content is preferably 10 ppm or less, and more preferably 1 ppm or less.
- the raw material has 100 or less particles larger than 0.3 ⁇ m in the particle measurement by the light scattering liquid particle detector in the liquid phase.
- the number of particles larger than 0.2 ⁇ m is more preferably 1000 or less in 1 ml of the liquid phase, and the number of particles larger than 0.2 ⁇ m is 100 or less in 1 ml of the liquid phase. Is more preferable.
- a reactive gas used in the CVD method or ALD method incorporating the process of the present invention in addition to water vapor, for example, as an oxide, oxygen, single oxygen, ozone, Examples include carbon dioxide, nitrogen dioxide, nitric oxide, hydrogen peroxide, formic acid, acetic acid, acetic anhydride, and peracetic acid.
- the production conditions of the metal-containing thin film by the CVD method or ALD method incorporating the process of the present invention include reaction temperature (substrate temperature), reaction pressure, deposition rate, and the like.
- the reaction temperature is preferably 150 ° C. or higher, which is the temperature at which the metal compound sufficiently reacts, and more preferably 250 ° C. to 450 ° C.
- the reaction pressure is preferably from atmospheric pressure to 10 Pa, and preferably 2000 Pa to 10 Pa when using plasma.
- the deposition rate can be controlled by the raw material supply conditions (vaporization temperature, vaporization pressure), reaction temperature, and reaction pressure. When the deposition rate is large, the properties of the obtained thin film may be deteriorated. When the deposition rate is small, productivity may be problematic. Therefore, the deposition rate is preferably 0.5 to 5000 nm / min, and more preferably 1 to 1000 nm / min. In the case of ALD, the number of cycles is controlled so as to obtain a desired film thickness.
- annealing may be performed in an inert atmosphere, an oxidizing atmosphere, or a reducing atmosphere in order to obtain better electrical characteristics after thin film deposition. It may be provided. Annealing and reflow temperatures are within the allowable temperature range for applications. Usually, it is 300 to 1200 ° C, preferably 400 to 600 ° C.
- Examples of the thin film produced by a thin film production method such as a CVD method or an ALD method incorporating the process of the present invention include a metal oxide thin film, a metal oxynitride thin film, and glass.
- Examples of the composition of the thin film to be produced include silicon oxide, titanium oxide, zirconium oxide, hafnium oxide, bismuth-titanium composite oxide, bismuth-rare earth element-titanium composite oxide, silicon- Titanium composite oxide, silicon-zirconium composite oxide, silicon-hafnium composite oxide, hafnium-aluminum composite oxide, hafnium-rare earth complex oxide, silicon-bismuth-titanium composite oxide, silicon-hafnium-aluminum composite oxide , Silicon-hafnium-rare earth complex oxide, titanium-zirconium-lead complex oxide, titanium-lead complex oxide, strontium-titanium complex oxide, barium-titanium complex oxide, barium-strontium-titan
- metal nitride thin film is silicon nitride, titanium oxynitride, zirconium nitride, hafnium nitride, titanium - aluminum complex nitride, silicon - hafnium complex oxynitride (HfSiON), include titanium complex oxynitride.
- Applications of these thin films include high dielectric capacitor films, gate insulating films, gate films, electrode films, barrier films, ferroelectric capacitor films, capacitor film and other electronic component members, optical fibers, optical waveguides, optical amplifiers, optical switches An optical glass member such as
- Example 1 Dehydration with 1-butanol Using commercially available 1-butanol (water content of 43 mass% in the azeotropic composition) as a purge solvent, dehydration was performed using the apparatus shown in FIG. 1 under the following conditions. . (line) VCR (registered trademark) metal gasket type face seal joint (manufactured by Swagelok; total length 306.8 mm, inner diameter 4.6 mm) connected five (process) (1) Introduce ultrapure water into the line. (2) Perform an argon purge for 5 seconds. (3) Line temperature: Hold at 100 ° C. for 30 minutes to evaporate residual moisture.
- VCR registered trademark metal gasket type face seal joint
- Example 2 Dehydration with 1-pentanol Dehydration was performed under the same conditions as in Example 1 except that the purge solvent was changed to 1-pentanol (water content 54 mass% in the azeotropic composition).
- the mixed solvent has a water content of 14% by mass in the azeotropic composition and an alcoholic solvent content in the azeotropic composition with the alcoholic solvent of 27% by mass.
- the mixed solvent has a water content of 5.2 mass% in the azeotropic composition and an alcohol solvent content in the azeotropic composition with the alcohol solvent of 42 mass%.
- Example 5 Dehydration with isopropanol Dehydration was performed under the same conditions as in Example 1 except that the purge solvent was changed to isopropanol (water content of 12 mass% in the azeotropic composition).
- Example 6 Dehydration with isopropyl ether Dehydration was performed under the same conditions as in Example 1 except that the purge solvent was changed to isopropyl ether (water content of 4.5 mass% in the azeotropic composition).
- step (6) in the example the change with time of 0 to 10 minutes of pressure was measured with a Pirani gauge.
- P B Pressure when water is not flowing (blank)
- P A Pressure when only argon is ventilated after passing water
- P X Pressure when purging the purge solvent gas after passing water is substituted into the following formula to obtain the degree of vacuum, and when pressure reduction starts The average values for 10 minutes were compared.
- the results of the absolute value of the pressure after 10 minutes and the average vacuum reach are shown in [Table 1].
- (Degree of vacuum reach) 100 ⁇ (P A ⁇ P X ) / (P A ⁇ P B )
- Examples 1 and 2 using 1-butanol and 1-pentanol having a water content of 20% by mass or more in the azeotropic composition as the purge solvent, and the alcohol system in the azeotropic composition with the alcohol solvent.
- Examples 3 and 4 using a 1-pentanol / xylene mixed solvent and an isopropanol / toluene mixed solvent having a solvent content of 20% by mass or more as the purge solvent have a high average vacuum reach and efficiently remove moisture in the system. It can be seen that it can be removed.
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Abstract
Description
通常のALD法による金属含有薄膜の製造においては、堆積部への薄膜形成用原料(以下、単に原料ともいう)と反応性ガスの供給を交互に行い、これを1サイクルとして所望の薄膜の分子層を段階的に堆積させる。該薄膜形成用原料は、後述する金属化合物をプレカーサとして含有するものである。必要に応じて、それぞれ異なるプレカーサを含有する複数の原料を併用することもできる。複数の原料を併用する場合は、各原料をそれぞれ独立で堆積部へ順次供給し、最後に反応性ガスを供給し、これを1サイクルとする。
(組成1)
ケトン系溶剤 20~40質量%
炭化水素系溶剤 60~80質量%
(組成2)
アルコール系溶剤 20~50質量%
エーテル系溶剤 1~20質量%
炭化水素系溶剤 30~79質量%
パージソルベントとして市販の1-ブタノール(共沸組成中の水含有量43質量%)を用い、図1に示す装置を用いて以下の条件で脱水を行った。
(ライン)
VCR(登録商標)メタル・ガスケット式面シール継手(Swagelok社製;全長306.8mm、内径4.6mm)を5つ連結したもの
(工程)
(1)ラインに超純水を導入する。
(2)5秒間のアルゴンパージを行う。
(3)ライン温度;100℃で30分間保持し、残存水分を気化させる。
(4)ライン温度;100℃で5分間、0.5slmでアルゴンをバブリングしながら気化させた1-ブタノールガスを導入し、残存水分を除去する。
(5)30秒間のアルゴンパージにより、パージソルベントガスを除去する。
(6)真空ポンプで減圧しながら、ピラニ真空計で圧力を10分間モニタリングする。
パージソルベントを1-ペンタノール(共沸組成中の水含有量54質量%)に変えた以外は実施例1と同条件で脱水を行った。
パージソルベントを1-ペンタノール/キシレン=1:1(モル比)混合溶剤に変えた以外は実施例1と同条件で脱水を行った。尚、該混合溶剤は、共沸組成中の水含有量が14質量%であり、アルコール系溶剤との共沸組成中のアルコール系溶剤含有量が27質量%である。
パージソルベントをイソプロパノール/トルエン=1:1(モル比)混合溶剤に変えた以外は実施例1と同条件で脱水を行った。尚、該混合溶剤は、共沸組成中の水含有量が5.2質量%であり、アルコール系溶剤との共沸組成中のアルコール系溶剤含有量が42質量%である。
パージソルベントをイソプロパノール(共沸組成中の水含有量12質量%)に変えた以外は実施例1と同条件で脱水を行った。
パージソルベントをイソプロピルエーテル(共沸組成中の水含有量4.5質量%)に変えた以外は実施例1と同条件で脱水を行った。
実施例における工程(6)においてピラニ真空計で圧力の0~10分の間の経時変化を測定し、
PB=通水していない場合の圧力(ブランク)
PA=通水後、アルゴンのみを通気した場合の圧力
PX=通水後、パージソルベントガスを通気した場合の圧力
それぞれの値を下記式に代入して真空到達度を求め、減圧開始時点から10分間の平均値を比較した。10分後の圧力の絶対値と平均真空到達度の結果を[表1]に示す。
(真空到達度)=100×(PA-PX)/(PA-PB)
Claims (11)
- 基板上に金属含有薄膜を成膜する金属含有薄膜の製造方法において適用される残存水分子除去プロセスであって、パージソルベントを気化させたガスを用いることにより残存した水分子を除去するプロセス。
- 上記パージソルベントが、共沸組成中の水含有量が20質量%以上である有機溶剤又は有機溶剤組成物からなる請求項1記載のプロセス。
- 上記パージソルベントが、アルコール系溶剤又はアルコール系溶剤を含む有機溶剤組成物からなる請求項1又は2記載のプロセス。
- 上記パージソルベントが、アルコール系溶剤、又はアルコール系溶剤及び炭化水素系溶剤からなる有機溶剤組成物である請求項1~3のいずれかに記載のプロセス。
- 上記アルコール系溶剤が、1-ブタノール又は1-ペンタノールである請求項3又は4記載のプロセス。
- 上記パージソルベントが、アルコール系溶剤及び炭化水素系溶剤からなる有機溶剤組成物であり、該アルコール系溶剤が1-ブタノール又は1-ペンタノールであり、該炭化水素系溶剤がトルエン又はキシレンである請求項4記載のプロセス。
- 共沸組成中の水含有量が20質量%以上である有機溶剤又は有機溶剤組成物からなるパージソルベント。
- アルコール系溶剤又はアルコール系溶剤を含む有機溶剤組成物からなる請求項7記載のパージソルベント。
- アルコール系溶剤、又はアルコール系溶剤及び炭化水素系溶剤からなる有機溶剤組成物である請求項7又は8記載のパージソルベント。
- 上記アルコール系溶剤が1-ブタノール又は1-ペンタノールである請求項8又は9記載のパージソルベント。
- 上記のアルコール系溶剤及び炭化水素系溶剤からなる有機溶剤組成物であり、該アルコール系溶剤が1-ブタノール又は1-ペンタノールであり、該炭化水素系溶剤がトルエン又はキシレンである請求項9記載のパージソルベント。
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011503751A JPWO2010103893A1 (ja) | 2009-03-13 | 2010-02-15 | 金属含有薄膜の製造方法における残存水分子除去プロセス及びパージソルベント |
| US13/143,298 US20110268887A1 (en) | 2009-03-13 | 2010-02-15 | Process for removing residual water molecules in metallic-thin-film production method and purge solvent |
| CN2010800041459A CN102272349A (zh) | 2009-03-13 | 2010-02-15 | 含金属薄膜的制造方法中的残存水分子除去工艺及清洗溶剂 |
| EP10750648A EP2407576A4 (en) | 2009-03-13 | 2010-02-15 | METHOD FOR REMOVING REMAIN WATER MOLECULES IN A METHOD FOR PRODUCING A METALLIC THIN FILM AND SPILLING / CLEANING AGENT THEREFOR |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009060883 | 2009-03-13 | ||
| JP2009-060883 | 2009-03-13 |
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| US (1) | US20110268887A1 (ja) |
| EP (1) | EP2407576A4 (ja) |
| JP (1) | JPWO2010103893A1 (ja) |
| KR (1) | KR20110134376A (ja) |
| CN (1) | CN102272349A (ja) |
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| WO (1) | WO2010103893A1 (ja) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20220095457A (ko) * | 2020-12-30 | 2022-07-07 | 에스케이트리켐 주식회사 | 유기금속 할로겐화물을 함유하는 금속막 형성용 전구체, 이를 이용한 금속막 형성 방법 및 상기 금속막을 포함하는 반도체 소자. |
| JP2023090111A (ja) * | 2021-12-17 | 2023-06-29 | 株式会社Adeka | 薄膜形成用原料、薄膜及び薄膜の製造方法 |
| CN118929888A (zh) * | 2024-09-11 | 2024-11-12 | 中国科学院生态环境研究中心 | 一种去除高浓度酸性废水中抗生素的方法 |
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| JP6484478B2 (ja) * | 2015-03-25 | 2019-03-13 | 株式会社Kokusai Electric | 半導体装置の製造方法、基板処理装置およびプログラム |
| KR20190005741A (ko) | 2017-07-07 | 2019-01-16 | 도쿄엘렉트론가부시키가이샤 | 반도체 장치의 제조 방법 및 금속 산화물 막의 형성 방법 |
| JP7189310B1 (ja) * | 2021-12-03 | 2022-12-13 | 株式会社アルバック | 真空処理装置のクリーニング方法 |
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| KR20220095457A (ko) * | 2020-12-30 | 2022-07-07 | 에스케이트리켐 주식회사 | 유기금속 할로겐화물을 함유하는 금속막 형성용 전구체, 이를 이용한 금속막 형성 방법 및 상기 금속막을 포함하는 반도체 소자. |
| KR102486128B1 (ko) | 2020-12-30 | 2023-01-06 | 에스케이트리켐 주식회사 | 유기금속 할로겐화물을 함유하는 금속막 형성용 전구체, 이를 이용한 금속막 형성 방법 및 상기 금속막을 포함하는 반도체 소자. |
| JP2023090111A (ja) * | 2021-12-17 | 2023-06-29 | 株式会社Adeka | 薄膜形成用原料、薄膜及び薄膜の製造方法 |
| JP7780320B2 (ja) | 2021-12-17 | 2025-12-04 | 株式会社Adeka | 薄膜形成用原料、薄膜及び薄膜の製造方法 |
| CN118929888A (zh) * | 2024-09-11 | 2024-11-12 | 中国科学院生态环境研究中心 | 一种去除高浓度酸性废水中抗生素的方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2407576A1 (en) | 2012-01-18 |
| JPWO2010103893A1 (ja) | 2012-09-13 |
| US20110268887A1 (en) | 2011-11-03 |
| KR20110134376A (ko) | 2011-12-14 |
| CN102272349A (zh) | 2011-12-07 |
| TW201035339A (en) | 2010-10-01 |
| EP2407576A4 (en) | 2013-02-20 |
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