WO2015041207A1 - 被膜形成用組成物およびそれを用いた被膜形成方法 - Google Patents
被膜形成用組成物およびそれを用いた被膜形成方法 Download PDFInfo
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- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/14—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers in which at least two but not all the silicon atoms are connected by linkages other than oxygen atoms
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- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/04—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases
- B05D3/0486—Operating the coating or treatment in a controlled atmosphere
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- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/06—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation
- B05D3/061—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation using U.V.
- B05D3/065—After-treatment
- B05D3/066—After-treatment involving also the use of a gas
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- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/06—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation
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- B05D3/065—After-treatment
- B05D3/067—Curing or cross-linking the coating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
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- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/02—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to macromolecular substances, e.g. rubber
- B05D7/04—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to macromolecular substances, e.g. rubber to surfaces of films or sheets
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- C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
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- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/16—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers in which all the silicon atoms are connected by linkages other than oxygen atoms
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/20—Diluents or solvents
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
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- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/22—Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen and oxygen
- C08G77/26—Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen and oxygen nitrogen-containing groups
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- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/60—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule in which all the silicon atoms are connected by linkages other than oxygen atoms
- C08G77/62—Nitrogen atoms
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- C08J2300/00—Characterised by the use of unspecified polymers
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- C08J2383/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen, or carbon only; Derivatives of such polymers
- C08J2383/16—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen, or carbon only; Derivatives of such polymers in which all the silicon atoms are connected by linkages other than oxygen atoms
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- C08J2483/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen, or carbon only; Derivatives of such polymers
- C08J2483/04—Polysiloxanes
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- C08J2483/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen, or carbon only; Derivatives of such polymers
- C08J2483/04—Polysiloxanes
- C08J2483/08—Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen, and oxygen
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- C08J2483/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen, or carbon only; Derivatives of such polymers
- C08J2483/14—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen, or carbon only; Derivatives of such polymers in which at least two but not all the silicon atoms are connected by linkages other than oxygen atoms
Definitions
- the present invention relates to a composition for producing a film having high gas barrier performance that can be used for production of display devices and semiconductor elements, and a film forming method using the composition.
- Silicone films are relatively high in hardness and hermeticity, and are therefore used in various applications in the field of manufacturing semiconductor devices. Specifically, hard coat films such as substrates and circuits, gas barrier films, substrates It is used for applications such as a material strength improving film. Various types of silicon films have been studied.
- Patent Document 1 discloses a method of manufacturing a gas barrier film by laminating a plurality of gas barrier films
- Patent Document 2 discloses a gas barrier film in which an ultraviolet cut layer and a gas barrier film are formed on both surfaces of a substrate.
- a gas barrier film including a bleed-out preventing layer, a layer having UV cut property, and a fluororesin layer as required, all of which are polysilazane materials as part of the material of the gas barrier film. Is used.
- Patent Document 4 discloses a method of forming a gas barrier film by irradiating a polysilazane film containing a catalyst with vacuum ultraviolet light (wavelength 230 nm or less) and ultraviolet light (wavelength 230 to 300 nm) in the presence of water vapor.
- Patent Document 5 discloses a method of forming a gas barrier film by irradiating a coating film formed from a polysilazane composition containing a transition metal with vacuum ultraviolet rays (wavelength of 230 nm or less) in a nitrogen atmosphere.
- a film formed from a film-forming material containing polysilazane as a main component often has insufficient gas barrier performance, and a film with improved gas barrier performance can be formed.
- a film forming composition and a film forming method have been desired.
- the present invention is intended to provide a film with better gas barrier performance, and a film forming composition and a film forming method capable of forming such a film.
- the film-forming composition according to the present invention has the following general formula (1): ⁇
- R 11 each independently represent a hydrogen atom, an alkyl group, an alkenyl group, a cycloalkyl group, an aryl group, an alkoxy group, an amino group, and a group selected from the group consisting of alkyl silyl group
- R 11 Is a group other than a hydrogen atom, it may be substituted with one or more groups selected from the group consisting of halogen atoms, alkyl groups, alkoxy groups, amino groups, silyl groups, and alkylsilyl groups.
- R 11 in the formula is 5% or less of the total number of R 11
- R 12 each independently represents a hydrocarbon group having 1 to 8 carbon atoms, Or —R 13 —N—R 14 2 (wherein R 13 is a hydrocarbon group having 1 to 5 carbon atoms, and each R 14 is independently hydrogen or a hydrocarbon group having 1 to 3 carbon atoms) Is ⁇ And polysilazane, and an organic solvent.
- the film forming method according to the present invention includes the following steps: (1) An application process in which the coating composition is applied onto a substrate made of an organic material to form a coating film, and (2) an exposure process in which light is applied to the coating film. It is characterized by comprising.
- the coating film according to the present invention is manufactured by the above-described method.
- Film-forming composition The film-forming composition according to the present invention comprises polysiloxane, polysilazane, and an organic solvent as essential components, and may contain other additives as necessary. Each of these components will be described as follows.
- polysiloxane having a specific structure is used.
- this polysiloxane reacts with polysilazane described later to form a cured film.
- This polysiloxane is represented by the following general formula (I).
- R 11 is each independently a group selected from the group consisting of a hydrogen atom, an alkyl group, an alkenyl group, a cycloalkyl group, an aryl group, an alkoxy group, an amino group, and an alkylsilyl group.
- R 11 may be substituted with one or more groups selected from the group consisting of halogen atoms, alkyl groups, alkoxy groups, amino groups, silyl groups, and alkylsilyl groups.
- R 11 form a side chain of polysiloxane, but preferably do not contain a highly reactive substituent in order to prevent unnecessary reaction. For this reason, an alkyl group is preferable, an alkyl group having 1 to 3 carbon atoms is preferable, and a methyl group is most preferable.
- R 11 in the formula may be a different group, but all are preferably alkyl groups, particularly methyl groups.
- R 11 may contain a small amount of a reactive group as long as the effects of the present invention are not impaired. Specifically, the effects of the present invention can be exhibited if the total number of amino groups and alkoxy groups contained in all R 11 is 5% or less, preferably 3% or less, of the total number of R 11 .
- R 11 contains a hydroxyl group, a carboxyl group, or the like, a highly hydratable hydroxyl group remains in the film, and thus it is difficult to improve the gas barrier performance. Therefore, it is preferred that R 11 does not contain a hydroxyl group or a carboxyl group.
- R 12 is a terminal group bonded to a silicon atom at the terminal of the polysiloxane main chain.
- this end group part binds to polysilazane described later, stabilizes nitrogen atoms in polysilazane, and has high gas barrier performance. It is estimated that Then, in order to proceed properly the reaction of the polysiloxane and polysilazane, R 12 is required to be certain things.
- R 12 is a hydrocarbon group having 1 to 8 carbon atoms. Moreover, a part of carbon contained in such a hydrocarbon group may be substituted with nitrogen.
- Nitrogen substituted hydrocarbon groups include -R 13 -N-R 14 2.
- R 13 is a hydrocarbon group having 1 to 5 carbon atoms
- R 14 is independently hydrogen or a hydrocarbon group having 1 to 3 carbon atoms.
- R 12 is selected to have an appropriate reactivity, and specifically, methyl group, ethyl group, propyl group, aminomethyl group, aminoethyl group, aminopropyl group, or N-ethylamino group is selected.
- a group selected from the group consisting of -2-methylpropyl groups is preferred.
- a plurality of R 12 are contained in the polysiloxane represented by the formula (1), but they may be the same or different.
- the molecular weight of the polysiloxane used in the present invention is not particularly limited, but for example, those having an average molecular weight in terms of polystyrene in the range of 500 to 100,000 are preferred, and those having a molecular weight in the range of 1,000 to 50,000 are more preferred.
- R 21 is independently a group selected from the group consisting of a hydrogen atom, an alkyl group, an alkenyl group, a cycloalkyl group, an aryl group, an alkoxy group, an amino group, and a silyl group.
- R 21 is a group other than a hydrogen atom, it is substituted with one or more groups selected from the group consisting of halogen atoms, alkyl groups, alkoxy groups, amino groups, silyl groups, and alkylsilyl groups. Also good.
- R 21 having such a substituent include a fluoroalkyl group, a perfluoroalkyl group, a silylalkyl group, a trisilylalkyl group, an alkylsilylalkyl group, a trialkylsilyl group, an alkoxysilylalkyl group, and a fluoroalkoxy group.
- each R 21 independently represents (a) hydrogen, (b) an alkyl group such as a methyl group, an ethyl group, or a propyl group, (c) an alkenyl group such as a vinyl group or an allyl group, (d It is preferably a group selected from the group consisting of: an aryl group such as a phenyl group, (e) an alkylsilyl group such as a trimethylsilyl group, and (f) an alkoxysilylalkyl group such as a triethoxysilylpropyl group.
- the polysilazane mainly containing the structural unit represented by the general formula (2) has a linear structure.
- polysilazane having other structures, that is, a branched chain structure or a cyclic structure can also be used.
- Such polysilazane includes a structure of the following formula:
- the polysilazanes represented by these formulas can be broadly classified into organopolysilazanes containing an organic group in R 21 and perhydropolysilazanes in which all of R 21 are hydrogen. These polysilazanes can be produced by any conventionally known method.
- metallopolysilazanes in which a part of these polysilazanes is modified with a metal compound borosilazanes containing boron, polysiloxazan containing a silicone structure, and the like can be used.
- these polysilazane modified products are also referred to as polysilazane for convenience.
- two or more of these polysilazanes can be used in combination.
- the molecular weight of the polysilazane used in the present invention is not particularly limited.
- the polysilazane having a polystyrene-converted average molecular weight is preferably in the range of 500 to 20,000, more preferably in the range of 1,000 to 10,000.
- the film-forming composition according to the present invention comprises a solvent capable of dissolving the polysiloxane and the polysilazane.
- a solvent is not particularly limited as long as it can dissolve the components to be used.
- preferable solvents include the following: (A) aromatic hydrocarbon compounds such as benzene, toluene, xylene, ethylbenzene, diethylbenzene, trimethylbenzene, triethylbenzene, tetrahydronaphthalene, etc.
- (C) alicyclic hydrocarbon compounds such as ethylcyclohexane, methylcyclohexane, cyclohexane, cyclohexene, p-menthane, decahydronaphthalene, dipentene, limonene, etc.
- alkyl ethers such as dipropyl ether, dibutyl ether, diethyl ether, dipentyl ether, dihexyl ether, methyl tertiary butyl ether (hereinafter referred to as MTBE), anisole and the like, and (e) ketones such as methyl isobutyl ketone ( Hereinafter referred to as MIBK).
- MIBK methyl isobutyl ketone
- MIBK ketones
- MIBK methyl isobutyl ketone
- solvents may be used in the form of a mixture of two or more as appropriate in order to adjust the evaporation rate of the solvent, to reduce the harmfulness to the human body, or to adjust the solubility of each component.
- the film-forming composition can also contain an amine compound or a metal complex compound. These compounds function as a catalyst when the composition applied on the substrate undergoes a curing reaction.
- any compound can be used.
- an aliphatic amine, an aromatic amine, or a heterocyclic amine can be preferably used.
- the aliphatic amine or aromatic amine may be a primary amine, secondary amine, or tertiary amine. These may have any number of nitrogen atoms, such as monoamine, diamine, or triamine.
- the heterocyclic amine include compounds containing a pyrrole ring, a pyridine ring, a pyrazine ring, a pyrimidine ring, a triazole ring, and the like. These amine compounds may be substituted with any substituent, for example, a group selected from the group consisting of an alkoxy group, an alkylene group, a silyl group, and an alkylsilyl group.
- preferred amine compounds include dipropylamine, diisopropylamine, tripropylamine, butylamine, dibutylamine, tributylamine, isobutylamine, diisobutylamine, tert-butylamine, pentylamine, tripentylamine hexylamine, N-methyl Hexylamine, N, N-dimethylhexylamine, N, N-dimethyl-2-ethylhexylamine, heptylamine, octylamine, di-n-octylamine N-methyl di-n-octylamine, tri-n-octylamine, N, N, N ′, N′-tetramethyldiaminomethane, N, N′-dimethylethylenediamine, N, N, N ′, N′-tetramethylethylenediamine, N, N, N ′, N′-tetramethyl-1, 3-propan
- the amine compound can be selected from any compounds that do not impair the effects of the present invention. However, when an alcohol amine or a part of the N-heterocyclic amine is used, Si is used for curing the coating. Care must be taken because -O bonds may increase.
- the metal complex compound any compound can be used as long as it can accelerate the curing reaction of the film.
- the metal is preferably selected from the group consisting of nickel, titanium, platinum, rhodium, cobalt, iron, iridium, aluminum, ruthenium, palladium, rhenium, and tungsten.
- the ligand selected from the group which consists of an acetylacetonato group, a carbonyl group, and a carboxylate group is preferable.
- the carboxylate group is a residue of a carboxylic acid selected from formic acid, acetic acid, propionic acid, butyric acid, octanoic acid, lauric acid, stearic acid, oleic acid, lactic acid, succinic acid, and citric acid Is preferred.
- a carboxylic acid selected from formic acid, acetic acid, propionic acid, butyric acid, octanoic acid, lauric acid, stearic acid, oleic acid, lactic acid, succinic acid, and citric acid Is preferred.
- preferred metal complex compounds include tris (acetylacetonato) aluminum, tris (acetylacetonato) iron, tris (acetylacetonato) rhodium, tris (acetylacetonato) cobalt, tris (acetylacetonato) ruthenium, Bis (acetylacetonato) palladium, hexacarbonyltungsten, dodecacarbonyltriruthenium, dodecacarbonyldirenium, palladium acetate, palladium propionate, nickel benzoate, nickel octoate, nickel oleate, iron formate, cobalt benzoate, citrus Examples include cobalt acid, cobalt formate, rhodium triacetate, dirhodium tetraacetate, titanium oleate, aluminum gluconate, aluminum benzoate, and aluminum butyrate.
- the film-forming composition according to the present invention may contain other additive components as necessary.
- examples of such components include viscosity modifiers and crosslinking accelerators.
- a phosphorus compound such as tris (trimethylsilyl) phosphate may be contained for the purpose of obtaining a sodium gettering effect when used in a semiconductor device.
- Film-forming composition The film-forming composition according to the present invention is obtained by dissolving or dispersing the polysiloxane, the polysilazane, and, if necessary, other additives in the organic solvent.
- the order in which each component is dissolved in the organic solvent is not particularly limited.
- the solvent can be replaced after the components are reacted.
- the content of each component described above varies depending on the intended use of the composition.
- the compounding ratio of polysiloxane and polysilazane can be appropriately adjusted according to the purpose. Generally, it is preferable that the compounding ratio of polysiloxane is large because the gas barrier property tends to be high. For this reason, it is preferable that the compounding quantity of polysiloxane with respect to 100 weight part of polysilazane is 0.01 polymerization part or more, and it is more preferable that it is 0.1 weight part or more. Moreover, in order to accelerate
- the content of the polymer component composed of polysiloxane and polysilazane is preferably 0.1 to 40% by weight based on the total weight of the composition in order to form a film having a sufficient film thickness. More preferably, the content is 0.1 to 30% by weight.
- the composition contains an amine compound, it is preferably a certain amount or more in order to sufficiently accelerate the curing reaction, and from the viewpoint of storage stability of the film forming composition, it may be a certain amount or less. preferable. Therefore, the content of the amine compound is preferably 0.005 to 1.00 mmol, more preferably 0.01 to 0.60 mmol, with respect to 1 g of the polymer.
- the composition contains a metal complex compound
- it is preferably a certain amount or more in order to sufficiently accelerate the curing reaction, and from the viewpoint of storage stability of the film-forming composition, it is a certain amount or less. Is preferred.
- the content of the metal complex compound is preferably 0.005 to 0.50 mmol, more preferably 0.01 to 0.20 mmol, relative to 1 g of the polymer.
- the film forming method according to the present invention includes: (1) The coating composition is applied to the substrate to form a coating film, and (2) an exposure process for irradiating the coating film with light.
- the substrate on which the film-forming composition is applied is not particularly limited, and is selected from any materials such as organic materials, inorganic materials, and metals. Since the film formed by the present invention is characterized by high gas barrier performance, it is preferable to form a film on the surface of a substrate made of an organic material because a film material having high gas barrier performance can be obtained.
- a plastic film such as polyethylene naphthalate, polyethylene terephthalate, polystyrene, polypropylene, polyethylene, polyimide, polyamide, cellulose acetate, acrylic, polycarbonate, and vinyl chloride is preferable.
- polyethylene naphthalate or polyethylene terephthalate is particularly preferable from the viewpoints of heat resistance and transparency.
- the coating can be formed not only on one side of the substrate but also on both sides of the substrate as required. In that case, it is necessary to select a substrate suitable for the purpose.
- the film-forming composition is applied to the surface of the substrate.
- the film forming composition is applied to one or both of the substrate surfaces.
- a conventionally known method can be used as a method for applying the film forming composition to the substrate surface. Examples thereof include spin coating, dip coating, spraying, roll coating, transfer, slit coating, and bar coating.
- the thickness of the coated film after application is preferably thick so that the formed film can exhibit sufficient gas barrier performance. Specifically, it is preferably 10 nm or more, and more preferably 50 nm or more. Moreover, it is preferable to set appropriately the thickness of the coating film after application
- substrate you may apply
- the coating film formed on the substrate surface is dried as necessary to remove excess organic solvent.
- light having a relatively short wavelength is used in the exposure step described later, it is preferable to remove as much as possible the organic solvent that tends to absorb light in the short wavelength region. At this time, drying can be performed more efficiently by being performed at a relatively high temperature.
- drying can be performed under reduced pressure. That is, by applying a negative pressure to the substrate after coating with a vacuum pump, a rotary pump, or the like, evaporation of the solvent in the coating film is accelerated, and drying can be promoted.
- an inert gas such as nitrogen can be sprayed onto the coating film from which excess solvent has been removed by drying.
- an inert gas such as nitrogen can be sprayed onto the coating film from which excess solvent has been removed by drying.
- the deposits on the surface of the coating film can be removed to increase the efficiency of light irradiation.
- the solvent etc. adhering to the surface can also be removed by irradiating infrared rays.
- the coating film thus obtained is subsequently subjected to an exposure process.
- the light irradiation conditions in the exposure step are appropriately selected according to the thickness, composition, hardness and the like of the coating film to be formed.
- the light irradiated in the exposure step preferably has a maximum peak wavelength of 161 to 248 nm, and preferably 165 to 180 nm. Any light source can be used as long as it can emit light of the above-mentioned wavelength, but a xenon excimer laser is typically used. In addition, by using a lamp that emits light in a wide wavelength range, only necessary irradiation light can be used for irradiation by a filter or a spectroscope.
- the terminal group portion of the polysiloxane and the polysilazane react with each other by this exposure step to form a film having excellent gas barrier performance.
- the wavelength of the light to irradiate can be selected according to the objective. That is, by irradiating light with a long wavelength, curing of a deeper part of the coating film can be promoted, and by irradiating with light with a shorter wavelength, curing of a shallower part of the coating film can be further promoted. You can also.
- the atmosphere in which the exposure is performed is arbitrarily selected according to the composition of the target film, but it is preferable to perform the light irradiation in an atmosphere in which oxygen does not permeate into the film, that is, an atmosphere with little oxygen.
- the oxygen content in the atmosphere is preferably 1000 ppm or less, and more preferably 100 ppm or less.
- light irradiation can be performed in a vacuum or under reduced pressure, or in an inert gas atmosphere. It is also effective to perform light irradiation after introducing an inert gas after reducing the atmosphere.
- the inert gas nitrogen, argon, helium, a mixed gas thereof, or the like is used.
- nitrogen is preferably used from the viewpoint of handleability.
- the nitrogen gas is inactive and is not taken into the film and does not increase the composition ratio of nitrogen.
- the light irradiation can be performed not only in a sealed container but also in an inert gas flow.
- ultraviolet irradiation can be performed in a mixed gas of ammonia, dinitrogen monoxide, and an inert gas thereof.
- ammonia or dinitrogen monoxide can serve as a nitrogen source when forming a coating having a high Si—N content. Therefore, by using these, the Si—N content in the coating can be increased and gas barrier performance can be further improved. Can be improved.
- the coating film can be heated simultaneously with light irradiation. Such heating can further accelerate the curing reaction. Further, after the exposure step, the curing reaction can be advanced by additional heating.
- the heating method is not particularly limited, and any method such as a method of heating a stage or the like on which a substrate is placed, a method of heating an atmospheric gas, or the like can be selected. However, when an organic material is used as the substrate, the heating temperature is preferably low because the substrate may be damaged if the heating temperature is too high. Specifically, the temperature until the coating film is cured and the coating film is formed is preferably 200 ° C. or less.
- the film formed in this way has excellent gas barrier performance, as well as excellent thermal stability and transparency.
- This film can be used for a gas barrier film such as a display device or a semiconductor device, and can also be used for a protective film or an insulating film.
- Polysiloxanes represented by formulas (1A) to (1G) and polysilazanes represented by formulas (2A) to (2C) were prepared.
- Polysilazane was synthesized according to the method described in Patent Document 6 using dichlorosilane, methyldichlorosilane, or the like as a raw material.
- a glass beaker having a capacity of 500 ml 20 g of polysilazane and 60 g of dibutyl ether were added and mixed to obtain a polysilazane solution.
- a predetermined amount of polysiloxane and dibutyl ether were mixed in a glass beaker having a capacity of 50 ml to prepare a total solution of 20 g.
- the obtained polysiloxane solution is added to the polysilazane solution, and a bubbling stirrer is performed by feeding dry nitrogen for 3 minutes to prepare a film-forming composition, so that a desired film thickness can be obtained with dibutyl ether. Dilution was performed.
- the prepared film forming composition was applied to a 125 ⁇ m thick polyethylene naphthalate film using a spin coater. Subsequently, the coated film was placed in an exposure apparatus, nitrogen was introduced into the apparatus to reduce the oxygen concentration to 100 ppm or less, and exposure treatment was performed for 30 minutes using a light source having a maximum peak wavelength of 172 nm to obtain a coating film. At this time, the illuminance of light was 8 mW / cm 2 . The illuminance was measured using a UV integrated light meter UIT-250 and a light receiver VUV-S172 (both trade names, manufactured by USHIO INC.).
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Abstract
Description
しかしながら、本発明者らの検討によれば、ポリシラザンを主成分とする被膜形成材料から形成された被膜は、ガスバリア性能が不十分である場合が多く、よりガスバリア性能が改良された被膜を形成できる被膜形成用組成物および被膜形成方法が望まれていた。
であらわされるポリシロキサンと、ポリシラザンと、有機溶剤とを含んでなることを特徴とするものである。
(1)前記の被膜形成用組成物を、有機材料からなる基板上に塗布して塗膜を形成させる塗布工程、および
(2)前記塗膜に光を照射する露光工程
を含んでなることを特徴とするものである。
本発明による被膜形成用組成物は、ポリシロキサンと、ポリシラザンと、有機溶剤とを必須成分として含んでなり、必要に応じてその他の添加剤を含むこともできる。これらの各成分について説明すると以下のとおりである。
本発明において、ポリシロキサンは特定の構造を有するものが用いられる。本発明による被膜形成用組成物から形成された塗膜が露光されたとき、このポリシロキサンと後述するポリシラザンとが反応し、硬化された被膜が形成される。このポリシロキサンは、下記一般式(I)によりあらわされるものである。
本発明による被膜形成用組成物に用いられるポリシラザンは特に限定されないが、典型的には、下記一般式(2)であらわされる構造単位を有する。
本発明による被膜形成用組成物は、前記ポリシロキサンおよび前記ポリシラザンを溶解し得る溶媒を含んでなる。このような溶媒としては、用いられる成分を溶解し得るものであれば特に限定されるものではないが、好ましい溶媒の具体例としては、次のものが挙げられる:
(a)芳香族炭化水素化合物、例えば、ベンゼン、トルエン、キシレン、エチルベンゼン、ジエチルベンゼン、トリメチルベンゼン、トリエチルベンゼン、テトラヒドロナフタレン等、
(b)飽和炭化水素化合物、例えばn-ペンタン、i-ペンタン、n-ヘキサン、i-ヘキサン、n-ヘプタン、i-ヘプタン、n-オクタン、i-オクタン、n-ノナン、i-ノナン、n-デカン、i-デカン等、
(c)脂環式炭化水素化合物、例えばエチルシクロヘキサン、メチルシクロヘキサン、シクロヘキサン、シクロヘキセン、p-メンタン、デカヒドロナフタレン、ジペンテン、リモネン等、
(d)アルキルエーテル類、例えばジプロピルエーテル、ジブチルエーテル、ジエチルエーテル、ジペンチルエーテル、ジヘキシルエーテル、メチルターシャリーブチルエーテル(以下、MTBEという)、アニソール等、および
(e)ケトン類、例えばメチルイソブチルケトン(以下、MIBKという)等。
これらのうち、(a)芳香族炭化水素化合物、(b)飽和炭化水素化合物、(c)脂環式炭化水素化合物、および(d)アルキルエーテル類が好ましく、特に、キシレンおよびジブチルエーテルが好ましい。
また、本発明において、被膜形成用組成物はアミン化合物または金属錯体化合物を含むこともできる。これらの化合物は基板上に塗布された組成物が硬化反応する際の触媒として機能するものである。
本発明による被膜形成用組成物は、前記ポリシロキサン、前記ポリシラザン、および必要に応じてその他の添加物を前記有機溶媒に溶解または分散させて組成物とする。ここで、有機溶媒に対して各成分を溶解させる順番は特に限定されない。また、配合成分を反応させた上で、溶媒を置換することもできる。
また、本発明による被膜形成方法は、
(1)前記の被膜形成用組成物を、基板上に塗布して塗膜を形成させる塗布工程、および(2)前記塗膜に光を照射する露光工程
を含んでなることを特徴としている。
式(1A)~(1G)に示されたポリシロキサンおよび式(2A)~(2C)に示されたポリシラザンを準備した。なお、ポリシラザンは、ジクロロシランやメチルジクロロシランなどを原料として、特許文献6などに記載の方法に準拠して合成した。
調製した被膜形成用組成物を、厚さ125μmのポリエチレンナフタレートフィルムにスピンコーターを用いて塗布した。引き続き、塗布済みフィルムを露光装置内に入れ、装置内に窒素を導入して酸素濃度を100ppm以下としてから、最大ピーク波長が172nmの光源を用い、30分間露光処理を行って被膜を得た。このとき、光の照度は、8mW/cm2であった。なお、照度の測定は紫外線積算光量計UIT-250および受光器VUV-S172(いずれも商品名、ウシオ電機株式会社製)を使用して行った。
透湿度をDELTAPERM-UHガス透過測定装置(Technolox社製)を用いて、塗布前のフィルムおよび上記の方法により得られた被膜付きのフィルムの、40℃、90%相対湿度雰囲気での透湿度を測定した。塗布前のフィルムの透湿度は1g/m2/dayであった。また、エリプソメーターにて得られた被膜の膜厚を測定した。膜厚はいずれも200nm であった。得られた結果は表1に示す通りであった。
Claims (14)
- 下記一般式(1):
R11はそれぞれ独立に、水素原子、アルキル基、アルケニル基、シクロアルキル基、アリール基、アルコキシ基、アミノ基、およびアルキルシリル基からなる群から選択される基であり、R11が水素原子以外の基であるとき、1またはそれ以上の、ハロゲン原子、アルキル基、アルコキシ基、アミノ基、シリル基、およびアルキルシリル基からなる群から選択される基により置換されていてもよく、
式中のすべてのR11に含まれるアミノ基、およびアルコキシ基の総数が、R11の総数の5%以下であり、
R12は、それぞれ独立に、炭素数1~8の炭化水素基、または-R13-N-R14 2(ここで、R13は炭素数1~5の炭化水素基であり、R14はそれぞれ独立に水素または炭素数1~3の炭化水素基である)である}
であらわされるポリシロキサンと、ポリシラザンと、有機溶剤とを含んでなることを特徴とする被膜形成用組成物。 - 前記R11が、炭素数1~3のアルキル基である、請求項1に記載の被膜形成用組成物。
- 前記R12が、メチル基、エチル基、プロピル基、アミノメチル基、アミノエチル基、アミノプロピル基、およびN-エチルアミノ-2-メチルプロピル基からなる群から選択される基である、請求項1または2に記載の被膜形成用組成物。
- 前記R21が、それぞれ独立に、水素、アルキル基、アルケニル基、アリール基、アルキルシリル基およびアルコキシシリルアルキル基からなる群から選択される基である、請求項4に記載の被膜形成用組成物。
- 前記ポリシラザン100重量部に対して、前記ポリシロキサンを0.01~25重量部含んでなる、請求項1~5のいずれか1項に記載の被膜形成用組成物。
- 前記有機溶剤が、芳香族炭化水素、飽和炭化水素化合物、脂環式炭化水素化合物もしくはアルキルエーテルである溶剤を1種類以上含んでなる、請求項1~6のいずれか1項に記載の被膜形成用組成物。
- 下記の工程:
(1)請求項1~7のいずれか1項に記載の被膜形成用組成物を、基板上に塗布して塗膜を形成させる塗布工程、および
(2)前記塗膜に光を照射する露光工程
を含んでなることを特徴とする、被膜形成方法。 - 前記基板がプラスチックフィルムである、請求項8に記載の被膜形成方法。
- 前記塗膜の厚さが、10nm以上900nm以下である、請求項8または9に記載の被膜形成方法。
- 前記光の波長が、161~248nmである、請求項8~10のいずれか1項に記載の被膜形成方法。
- 前記露光工程が不活性ガス雰囲気下で行われる、請求項8~11のいずれか1項に記載の方法。
- 前記被膜形成方法において、塗膜の形成から被膜を得るまでの間に塗膜が200℃以上の温度に付されることがない、請求項8~12のいずれか1項に記載の方法。
- 請求項8~13のいずれか1項に記載の方法で製造されたことを特徴とする被膜。
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TWI702251B (zh) * | 2015-04-20 | 2020-08-21 | 盧森堡商Az電子材料盧森堡有限公司 | 被膜形成用組成物及使用其之被膜形成方法 |
US10875969B2 (en) | 2015-04-20 | 2020-12-29 | Merck Patent Gmbh | Composition for forming coating film and method for forming coating film using same |
Also Published As
Publication number | Publication date |
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TW201516092A (zh) | 2015-05-01 |
JP6257975B2 (ja) | 2018-01-10 |
KR20160057450A (ko) | 2016-05-23 |
EP3048146B1 (en) | 2024-03-27 |
EP3048146A4 (en) | 2017-01-25 |
KR102048680B1 (ko) | 2019-11-27 |
SG11201601130YA (en) | 2016-04-28 |
TWI639653B (zh) | 2018-11-01 |
EP3048146A1 (en) | 2016-07-27 |
CN109971344A (zh) | 2019-07-05 |
CN105555886A (zh) | 2016-05-04 |
US10513632B2 (en) | 2019-12-24 |
US20160244638A1 (en) | 2016-08-25 |
JP2015059144A (ja) | 2015-03-30 |
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