WO2012086463A1 - 硬化性エポキシ樹脂組成物及びこれを使用した光半導体装置 - Google Patents
硬化性エポキシ樹脂組成物及びこれを使用した光半導体装置 Download PDFInfo
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- WO2012086463A1 WO2012086463A1 PCT/JP2011/078768 JP2011078768W WO2012086463A1 WO 2012086463 A1 WO2012086463 A1 WO 2012086463A1 JP 2011078768 W JP2011078768 W JP 2011078768W WO 2012086463 A1 WO2012086463 A1 WO 2012086463A1
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J113/00—Adhesives based on rubbers containing carboxyl groups
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/20—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the epoxy compounds used
- C08G59/22—Di-epoxy compounds
- C08G59/24—Di-epoxy compounds carbocyclic
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L63/00—Compositions of epoxy resins; Compositions of derivatives of epoxy resins
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/20—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the epoxy compounds used
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/20—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the epoxy compounds used
- C08G59/32—Epoxy compounds containing three or more epoxy groups
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
- C08G59/42—Polycarboxylic acids; Anhydrides, halides or low molecular weight esters thereof
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/28—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection
- H01L23/29—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection characterised by the material, e.g. carbon
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/28—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection
- H01L23/29—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection characterised by the material, e.g. carbon
- H01L23/293—Organic, e.g. plastic
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
- H01L2224/4805—Shape
- H01L2224/4809—Loop shape
- H01L2224/48091—Arched
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
- H01L2224/481—Disposition
- H01L2224/48151—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive
- H01L2224/48221—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked
- H01L2224/48245—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being metallic
- H01L2224/48247—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being metallic connecting the wire to a bond pad of the item
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
- H10H20/85—Packages
- H10H20/852—Encapsulations
- H10H20/854—Encapsulations characterised by their material, e.g. epoxy or silicone resins
Definitions
- the present invention relates to a curable epoxy resin composition and an optical semiconductor device in which an optical semiconductor element is sealed using the same.
- the cured product obtained by curing the curable epoxy resin composition of the present invention is excellent in heat resistance, light resistance and transparency, and exhibits higher crack resistance.
- the curable epoxy resin composition of the present invention hardly causes resin leakage from the package when the optical semiconductor element is sealed.
- epoxy resin that does not yellow, like the above aromatic epoxy resin, has good transparency and good heat resistance
- Liquid alicyclic compounds having an alicyclic skeleton such as adducts of 3,4-epoxycyclohexylmethyl-3 ′, 4′-epoxycyclohexanecarboxylate and ⁇ -caprolactone, 1,2,8,9-diepoxylimonene Epoxy resins are known.
- crack resistance refers to a characteristic that does not cause cracks even when a thermal shock is applied.
- Patent Document 1 As a method for improving crack resistance, a method of using an epoxy resin composition containing nuclear hydrogenated bisphenol A diglycidyl ether for sealing an optical semiconductor is known (see Patent Document 1).
- Patent Document 2 discloses a method of dispersing a core-shell polymer in an epoxy resin as a means for imparting toughness to the epoxy resin.
- Patent Document 3 a method is known in which polyether polyol is blended in an epoxy resin and particles having a core structure of butadiene rubber and a shell structure of methyl methacrylate resin are dispersed in the epoxy resin (Patent Document 3). reference).
- the above method is not satisfactory in terms of transparency of the cured product because the core structure uses particles made of butadiene rubber.
- a rubber particle-dispersed epoxy resin in which rubber particles having a specific configuration are dispersed in an alicyclic epoxy resin as a resin composition capable of obtaining a cured product having excellent crack resistance while maintaining high heat resistance and transparency.
- a resin composition for encapsulating an optical semiconductor is known in which the difference in refractive index between the rubber particles and the cured product of the composition is controlled within a specific range (see Patent Document 4).
- the cured product obtained by curing the resin composition has been found to be unable to exhibit sufficient crack resistance when encapsulating a bulky optical semiconductor element (for example, a red LED element). did. Further, when the optical semiconductor element is sealed using the resin composition, so-called “resin leakage” occurs in which the resin composition leaks from the package (for example, a gap between the metal wiring of the package and the reflector), It has been found that workability and the quality of the optical semiconductor device may deteriorate.
- an object of the present invention is to obtain a cured product that can exhibit higher crack resistance while maintaining high heat resistance, light resistance, and transparency, and from the package at the time of sealing.
- An object of the present invention is to provide a curable epoxy resin composition in which resin leakage hardly occurs.
- Another object of the present invention is to provide an optical semiconductor device in which an optical semiconductor element is sealed using the curable epoxy resin composition.
- the present inventor in a curable epoxy resin composition containing a rubber particle-dispersed epoxy compound in which rubber particles are dispersed in an alicyclic epoxy compound, alumina and a specific aliphatic group It has been found that by containing polyglycidyl ether as an essential component, the cured product has high heat resistance, light resistance, and transparency, and exhibits higher crack resistance. Moreover, the said curable epoxy resin composition also discovered that the resin leak from a package did not occur easily in the case of sealing.
- the curable epoxy resin composition rubber particles having a specific composition and a specific range of particle diameters are used as the rubber particles, and the refractive index difference between the rubber particles and the cured product of the curable epoxy resin composition is specified. By controlling to the range, high transparency, heat resistance, and crack resistance are exhibited with respect to the cured product of the resin composition.
- the present invention has been completed based on these findings and further research.
- the present invention is a curable epoxy resin composition containing a rubber particle-dispersed epoxy compound (A) in which rubber particles are dispersed in an alicyclic epoxy compound, further comprising alumina (B) and a viscosity at 25 ° C. And an aliphatic polyglycidyl ether (C) having a molecular weight of 8000 mPa ⁇ s or more, and the rubber particles are composed of a polymer having (meth) acrylic acid ester as an essential monomer component, and have hydroxyl groups and / or carboxyl groups on the surface.
- A rubber particle-dispersed epoxy compound
- B alumina
- C aliphatic polyglycidyl ether
- a curable epoxy resin composition that is within 0.03.
- the curable epoxy resin composition containing a curing agent (D) and a curing accelerator (E) or a curing catalyst (F) is provided.
- the curable epoxy resin composition is provided wherein the curing agent (D) is a liquid acid anhydride at 25 ° C.
- the curable epoxy resin composition is provided in which the curing catalyst (F) is a cationic polymerization initiator that generates cationic species by irradiation with ultraviolet rays or heat treatment.
- the curing catalyst (F) is a cationic polymerization initiator that generates cationic species by irradiation with ultraviolet rays or heat treatment.
- a glycidyl ether-based epoxy compound having no aromatic ring excluding aliphatic polyglycidyl ether (C)
- a polyol compound exhibiting a liquid state at 25 ° C. (however, polyether polyol and aliphatic polyglycidyl ether ( A curable epoxy resin composition as described above comprising (except for C).
- the curable epoxy resin composition is provided in which the aliphatic polyglycidyl ether (C) is sorbitol polyglycidyl ether.
- the curable epoxy resin composition for sealing an optical semiconductor is provided.
- the present invention also provides an optical semiconductor device in which an optical semiconductor element is sealed with the curable epoxy resin composition.
- the curable epoxy resin composition of the present invention Since the curable epoxy resin composition of the present invention has the above-described configuration, a cured product obtained by curing the resin composition maintains higher heat resistance, light resistance, and transparency while maintaining higher resistance. It can exhibit cracking properties. In addition, the curable epoxy resin composition of the present invention hardly causes resin leakage from the package when the optical semiconductor element is sealed, and improves workability and the quality of the optical semiconductor device. Therefore, the curable epoxy resin composition of the present invention can be preferably used in various fields including applications such as optical semiconductor related electrical / electronic sealing materials. In particular, when used as a sealant for an optical semiconductor element, the obtained optical semiconductor device can continue to exhibit high performance for a long period of time, and can obtain high reliability as a long-life optical semiconductor device. .
- the curable epoxy resin composition of the present invention includes a rubber particle-dispersed epoxy compound (A) in which rubber particles are dispersed in an alicyclic epoxy compound, and the rubber particles contain (meth) acrylic acid ester as an essential monomer component. And having a hydroxyl group and / or a carboxyl group on the surface, an average particle size of 10 nm to 500 nm, a maximum particle size of 50 nm to 1000 nm, the refractive index of the rubber particles and the curable epoxy resin composition The difference between the refractive index of the cured product and the cured product is within ⁇ 0.03.
- the curable epoxy resin composition of the present invention further includes alumina (B), an aliphatic polyglycidyl ether (C) having a viscosity at 25 ° C. of 8000 mPa ⁇ s or more, and It is characterized by including.
- the rubber particle-dispersed epoxy compound (A) in the curable epoxy resin composition of the present invention is composed of a polymer containing (meth) acrylic acid ester as an essential monomer component, and can react with an alicyclic epoxy compound on the surface.
- a rubber particle having a hydroxyl group and / or a carboxyl group as a functional group, an average particle diameter of 10 nm to 500 nm, and a maximum particle diameter of 50 nm to 1000 nm, the refractive index of the rubber particle and the curable epoxy resin composition A rubber particle-dispersed epoxy compound (rubber particle-dispersed epoxy resin) obtained by dispersing rubber particles having a difference from the refractive index of a cured product within ⁇ 0.03 in an alicyclic epoxy compound.
- the rubber particles in the present invention have a multilayer structure (core-shell structure) composed of a core portion having rubber elasticity and at least one shell layer covering the core portion.
- the rubber particles are composed of a polymer having (meth) acrylic acid ester as an essential monomer component, and have hydroxyl groups and / or carboxyl groups (hydroxyl groups) as functional groups capable of reacting with the alicyclic epoxy compound on the surface. And / or a carboxyl group).
- a hydroxyl group and / or a carboxyl group do not exist on the surface of the rubber particle, the cured product becomes clouded by a thermal shock such as a cooling / heating cycle and the transparency is lowered.
- (meth) acrylate such as methyl (meth) acrylate, ethyl (meth) acrylate, butyl (meth) acrylate is essential.
- monomer components that may be contained in addition to (meth) acrylic acid esters include aromatic vinyl such as styrene and ⁇ -methylstyrene; nitriles such as acrylonitrile and methacrylonitrile; conjugated dienes such as butadiene and isoprene; ethylene And olefins such as propylene and isobutene.
- the monomer component of the polymer constituting the core portion having rubber elasticity contains, together with (meth) acrylic acid ester, one or more selected from aromatic vinyl, nitrile, and conjugated diene.
- the polymer constituting the core part include binary copolymers such as (meth) acrylic acid ester / aromatic vinyl and (meth) acrylic acid ester / conjugated diene; (meth) acrylic acid ester / aromatic vinyl / Ternary copolymers such as conjugated dienes can be mentioned.
- the polymer constituting the core part may contain silicone such as polydimethylsiloxane and polyphenylmethylsiloxane, polyurethane, and the like.
- the monomer component constituting the rubber-elastic core portion is divinylbenzene, allyl (meth) acrylate, ethylene glycol di (meth) acrylate, diallyl maleate, triallyl cyanurate, diallyl phthalate, butylene glycol
- One monomer (one molecule) corresponding to diacrylate or the like may contain a reactive crosslinking monomer having two or more reactive functional groups.
- the core portion having rubber elasticity in the present invention is easily a core portion composed of a (meth) acrylate / aromatic vinyl binary copolymer (particularly butyl acrylate / styrene), among others. It is preferable in that the refractive index of the rubber particles can be adjusted.
- the core portion having rubber elasticity can be manufactured by a commonly used method, for example, by a method of polymerizing the above monomer by an emulsion polymerization method.
- the whole amount of the monomer may be charged at once and may be polymerized, or after polymerizing a part of the monomer, the remainder may be added continuously or intermittently to polymerize, Furthermore, a polymerization method using seed particles may be used.
- the shell layer is preferably composed of a polymer different from the polymer constituting the core portion. Moreover, a shell layer has a hydroxyl group and / or a carboxyl group as a functional group which can react with an alicyclic epoxy compound. As a result, the adhesiveness can be improved at the interface with the alicyclic epoxy compound, and it has excellent crack resistance by curing the curable epoxy resin composition containing the rubber particles having the shell layer. A transparent cured product without white turbidity can be obtained. Moreover, the fall of the glass transition temperature of hardened
- (meth) acrylic acid esters such as methyl (meth) acrylate, ethyl (meth) acrylate and butyl (meth) acrylate are preferably essential.
- the shell layer has a (meth) acrylic acid ester other than butyl acrylate (eg, methyl (meth) acrylate, (meth) It is preferable to use ethyl acrylate, butyl methacrylate or the like.
- Examples of the monomer component that may be contained in addition to the (meth) acrylic acid ester include aromatic vinyl such as styrene and ⁇ -methylstyrene, and nitrile such as acrylonitrile and methacrylonitrile.
- aromatic vinyl such as styrene and ⁇ -methylstyrene
- nitrile such as acrylonitrile and methacrylonitrile.
- the monomer component constituting the shell layer it is preferable to contain the above monomers alone or in combination of two or more, together with (meth) acrylic acid ester, and particularly at least aromatic vinyl. It is preferable that the refractive index of the rubber particles can be easily adjusted.
- hydroxyalkyl (meth) acrylate such as 2-hydroxyethyl (meth) acrylate, (meth) acrylic It is preferable to contain a monomer corresponding to an ⁇ , ⁇ -unsaturated acid such as an acid and an ⁇ , ⁇ -unsaturated acid anhydride such as a maleic anhydride.
- the monomer component constituting the shell layer preferably contains one or more selected from the above monomers together with (meth) acrylic acid ester. That is, the shell layer is composed of, for example, a ternary copolymer such as (meth) acrylic acid ester / aromatic vinyl / hydroxyalkyl (meth) acrylate, (meth) acrylic acid ester / aromatic vinyl / ⁇ , ⁇ -unsaturated acid.
- a shell layer composed of a polymer or the like is preferable.
- the monomer component constituting the shell layer is divinylbenzene, allyl (meth) acrylate, ethylene glycol di (meth) acrylate, diallyl maleate, triallyl cyanurate, diallyl phthalate.
- a reactive crosslinking monomer having two or more reactive functional groups may be contained in one monomer (one molecule) corresponding to butylene glycol diacrylate.
- a method of coating the core portion with the shell layer for example, a method of coating the surface of the core portion having rubber elasticity obtained by the above method by applying a copolymer constituting the shell layer, by the above method
- examples thereof include a method of graft polymerization using the obtained core portion having rubber elasticity as a trunk component and each component constituting the shell layer as a branch component.
- the average particle diameter of rubber particles in the rubber particle-dispersed epoxy compound (A) is 10 to 500 nm, preferably 20 to 400 nm.
- the maximum particle size of the rubber particles is 50 to 1000 nm, preferably 100 to 800 nm. If the average particle diameter exceeds 500 nm, or the maximum particle diameter exceeds 1000 nm, the transparency of the cured product tends to decrease, and the light intensity of the optical semiconductor device tends to decrease. On the other hand, when the average particle size is less than 10 nm or the maximum particle size is less than 50 nm, the crack resistance tends to be lowered.
- the refractive index of the rubber particles is not particularly limited, but is preferably 1.40 to 1.60, more preferably 1.42 to 1.58.
- the difference between the refractive index of the rubber particles and the refractive index of the cured product obtained by curing the curable epoxy resin composition (the curable epoxy resin composition of the present invention) containing the rubber particles is ⁇ 0.03. Is within. When the difference in refractive index exceeds ⁇ 0.03, the transparency of the cured product decreases, sometimes it becomes cloudy, the light intensity of the optical semiconductor device tends to decrease, and the function of the optical semiconductor device is lost. There is.
- the refractive index of the rubber particles is, for example, by casting 1 g of rubber particles into a mold and compression molding at 210 ° C. and 4 MPa to obtain a flat plate having a thickness of 1 mm. From the obtained flat plate, a test piece having a length of 20 mm ⁇ width of 6 mm And using a multi-wavelength Abbe refractometer (trade name “DR-M2”, manufactured by Atago Co., Ltd.) in a state where the prism and the test piece are in close contact using monobromonaphthalene as an intermediate solution, It can be determined by measuring the refractive index at 20 ° C. and sodium D line.
- DR-M2 multi-wavelength Abbe refractometer
- the refractive index of the cured product of the curable epoxy resin composition of the present invention is, for example, a test of 20 mm in length, 6 mm in width, and 1 mm in thickness from a cured product obtained by the heat curing method described in the section of the optical semiconductor device below.
- a multi-wavelength Abbe refractometer (trade name “DR-M2”, manufactured by Atago Co., Ltd.) is used with the prism and the test piece in close contact using monobromonaphthalene as an intermediate solution. It can be determined by measuring the refractive index at the sodium D line at 20 ° C.
- the alicyclic epoxy compound (alicyclic epoxy resin) constituting the rubber particle-dispersed epoxy compound (A) in the present invention has an epoxy group composed of two adjacent carbon atoms and oxygen atoms constituting the alicyclic ring. It is an alicyclic compound that can be used by arbitrarily selecting from well-known and conventional ones.
- the alicyclic epoxy compound preferably exhibits a liquid state at normal temperature (25 ° C.) from the viewpoint of workability during preparation and casting.
- the alicyclic epoxy compound in the present invention is particularly preferably an alicyclic epoxy compound represented by the following formula (1) in terms of transparency and heat resistance.
- Y represents a single bond or a linking group.
- the linking group include a divalent hydrocarbon group, a carbonyl group (—CO—), an ether bond (—O—), an ester bond ( -COO-), amide bond (-CONH-), carbonate bond (-OCOO-), and a group in which a plurality of these are linked.
- Examples of the divalent hydrocarbon group include a linear or branched alkylene group having 1 to 18 carbon atoms and a divalent alicyclic hydrocarbon group. Furthermore, examples of the linear or branched alkylene group include methylene, methylmethylene, dimethylmethylene, ethylene, propylene, and trimethylene groups. Examples of the divalent alicyclic hydrocarbon group include 1,2-cyclopentylene, 1,3-cyclopentylene, cyclopentylidene, 1,2-cyclohexylene, and 1,3-cyclohexane. And divalent cycloalkylene groups (including cycloalkylidene groups) such as xylene, 1,4-cyclohexylene and cyclohexylidene groups.
- Typical examples of the alicyclic epoxy compound represented by the above formula (1) include compounds represented by the following formulas (1a) to (1j).
- n1 to n8 represent an integer of 1 to 30.
- —O—R—O— represents a residue of a diol.
- R is a divalent hydrocarbon group; a divalent group in which a plurality of divalent hydrocarbon groups are bonded via one or more of linking groups such as an ether bond, an ester bond, an amide bond, and a carbonyl group.
- Examples of the divalent hydrocarbon group include the same groups as the divalent hydrocarbon group in Y above.
- alicyclic epoxy compounds can be used alone or in combination of two or more.
- trade names “Celoxide 2021P”, “Celoxide 2081” above, manufactured by Daicel Chemical Industries, Ltd.
- Commercial products can also be used.
- the rubber particle-dispersed epoxy compound (A) in the present invention is obtained by dispersing the rubber particles in the alicyclic epoxy compound.
- the blending amount of the rubber particles can be appropriately adjusted as necessary, and is not particularly limited, but is 0.5 to 30% by weight with respect to the total amount (100% by weight) of the rubber particle-dispersed epoxy compound (A). Preferably, it is 1 to 20% by weight.
- the amount of the rubber particles used is less than 0.5% by weight, the crack resistance tends to decrease.
- the usage-amount of rubber particle exceeds 30 weight%, there exists a tendency for heat resistance and transparency to fall.
- the viscosity of the rubber particle-dispersed epoxy compound (A) is not particularly limited, but the viscosity at 25 ° C. (viscosity (25 ° C.)) is preferably 400 mPa ⁇ s to 50000 mPa ⁇ s, and more preferably 500 mPa ⁇ s to 10000 mPa ⁇ s. More preferred.
- the viscosity (25 ° C.) of the rubber particle-dispersed epoxy compound (A) is less than 400 mPa ⁇ s, the transparency tends to decrease.
- the viscosity of the rubber particle-dispersed epoxy compound (A) can be adjusted by using a reactive diluent.
- a reactive diluent an aliphatic polyglycidyl ether having a viscosity at room temperature (25 ° C.) of 200 mPa ⁇ s or less can be preferably used.
- Examples of the aliphatic polyglycidyl ether having a viscosity (25 ° C.) of 200 mPa ⁇ s or less include cyclohexanedimethanol diglycidyl ether, cyclohexanediol diglycidyl ether, neopentyl glycol diglycidyl ether, and 1,6-hexanediol diglycidyl ether. , Trimethylolpropane triglycidyl ether, polypropylene glycol diglycidyl ether, and the like.
- the usage-amount of the said reactive diluent can be adjusted suitably, it is not specifically limited, 30 weight part or less is preferable with respect to 100 weight part of rubber particle dispersion
- the method for producing the rubber particle-dispersed epoxy compound (A) in the present invention is not particularly limited, and a well-known and commonly used method can be used. For example, rubber particles are dehydrated and dried to form powder, then mixed with alicyclic epoxy compound and dispersed, or rubber particle emulsion and alicyclic epoxy compound are directly mixed and dehydrated. can do.
- the amount of the rubber particle-dispersed epoxy compound (A) used is not particularly limited, but is based on the total epoxy group-containing resin (total epoxy group-containing compound) (100% by weight) contained in the curable epoxy resin composition. 30 to 90% by weight is preferable, and 50 to 90% by weight is more preferable. If the amount used is less than 30% by weight, the crack resistance of the resulting cured product tends to decrease.
- the alumina (B) in the curable epoxy resin composition of the present invention plays a role of preventing resin leakage from the package at the time of sealing and further improving the crack resistance of the cured product.
- the alumina (B) is not particularly limited, and known and commonly used alumina (aluminum oxide) particles can be used.
- an alumina (B) can be used individually by 1 type or in combination of 2 or more types.
- the shape of alumina (B) is not particularly limited, and examples thereof include a spherical shape, a crushed shape, a fiber shape, a needle shape, a scale shape, and a whisker shape. Among these, from the viewpoint of the dispersibility of the alumina particles, a spherical shape is preferable, and a true spherical shape is particularly preferable.
- the average particle size (average particle size) of alumina (B) is not particularly limited, but is preferably 0.1 to 20 ⁇ m, more preferably 0.1 to 10 ⁇ m from the viewpoint of transparency.
- the average particle diameter means a particle diameter at an integrated value of 50% in a particle size distribution measured by a laser diffraction / scattering method.
- alumina (B) those produced by a known and commonly used production method can be used.
- the method for producing alumina (B) include a dry method such as a vapor phase oxidation method and a wet method such as a hydrothermal synthesis method.
- the VMC method Vaporized Metal Combustion method, for example, see JP-A-2008-174624
- alumina produced by the VMC method is preferable.
- alumina (B) for example, trade name “AO-802” (manufactured by Admatechs Co., Ltd., average particle size: 0.7 ⁇ m, shape: true spherical shape, production method: VMC method), trade name “AO-502”
- commercial products such as “manufactured by Admatechs Co., Ltd., average particle diameter: 0.7 ⁇ m, shape: true spherical shape, production method: VMC method” can also be used.
- the use amount (blending amount) of alumina (B) is not particularly limited, but is preferably 0.1 to 3 parts by weight with respect to the total epoxy group-containing resin (100 parts by weight) contained in the curable epoxy resin composition. More preferably, it is 0.1 to 1 part by weight.
- the compounding amount of alumina (B) exceeds 3 parts by weight, the transparency of the cured product may be lowered.
- the amount is less than 0.1 parts by weight, resin leakage from the package may easily occur or crack resistance may be reduced.
- the aliphatic polyglycidyl ether (C) in the curable epoxy resin composition of the present invention plays a role of improving the crack resistance of the cured product.
- the aliphatic polyglycidyl ether (C) in the present invention is a compound in which part or all of the hydroxyl groups of the aliphatic polyol are glycidyl etherified.
- the “aliphatic polyol” refers to a compound in which two or more hydrogen atoms of a chain (straight chain or branched chain) hydrocarbon are substituted with a hydroxyl group (alcoholic hydroxyl group). Although it does not specifically limit as said aliphatic polyol, For example, sorbitol etc. are mentioned.
- aliphatic glycidyl ether (C) can be used individually by 1 type or in combination of 2 or more types.
- Aliphatic polyglycidyl ether (C) is an aliphatic polyglycidyl ether having a viscosity at 25 ° C. of 8000 mPa ⁇ s or more.
- the viscosity at 25 ° C. of the aliphatic polyglycidyl ether (C) is preferably, for example, 8000 to 20000 mPa ⁇ s.
- an aliphatic polyglycidyl ether having a viscosity at 25 ° C. of less than 8000 mPa ⁇ s is used instead of the aliphatic polyglycidyl ether (C), the crack resistance is lowered.
- the viscosity of the aliphatic glycidyl ether (C) at 25 ° C. is measured using, for example, a digital viscometer (trade name “DVU-EII type”, manufactured by Tokimec Co., Ltd.), rotor: standard 1 ° 34 ′ ⁇ R24 , Temperature: 25 ° C., rotation speed: 0.5 to 10 rpm.
- the aliphatic polyglycidyl ether (C) is not particularly limited as long as it is an aliphatic polyglycidyl ether having a viscosity (25 ° C.) of 8000 mPa ⁇ s or more.
- sorbitol polyglycidyl ether, xylitol polyglycidyl ether, mannitol And polyglycidyl ether are preferable from the viewpoint of crack resistance.
- the average number of epoxy groups (average number of epoxy groups) in one molecule of the aliphatic polyglycidyl ether (C) (particularly sorbitol polyglycidyl ether) is not particularly limited, but from the viewpoint of improving crack resistance, 3 to 4 is preferred.
- the average number of hydroxyl groups (average number of hydroxyl groups) in one molecule of the aliphatic polyglycidyl ether (C) (particularly sorbitol polyglycidyl ether) is not particularly limited, but from the viewpoint of improving crack resistance, 1 to 2 is preferred.
- aliphatic polyglycidyl ether for example, a commercial product such as a trade name “ERISYS GE60” (manufactured by CVC Thermoset Specialties, viscosity (25 ° C.): 13000 mPa ⁇ s, average number of epoxy groups: about 4) may be used. it can.
- Aliphatic polyglycidyl ether (C) is produced by a known and commonly used production method. For example, it can be produced by reacting epichlorohydrin with the above-mentioned aliphatic polyol (for example, sorbitol).
- the amount (blending amount) of the aliphatic polyglycidyl ether (C) in the curable epoxy resin composition of the present invention is not particularly limited, but the total epoxy group-containing resin (100% by weight) contained in the curable epoxy resin composition ) To 10 to 30% by weight, more preferably 10 to 20% by weight. If the blending amount of the aliphatic polyglycidyl ether (C) is less than 10% by weight, the crack resistance may be lowered.
- the curable epoxy resin composition of the present invention contains at least the rubber particle-dispersed epoxy compound (A), alumina (B), and aliphatic polyglycidyl ether (C).
- An aspect etc. are mentioned.
- the curing agent (D) has a function of curing the compound having an epoxy group.
- curing agent (D) a well-known and usual hardening
- an acid anhydride which is liquid at 25 ° C. is preferable, and examples thereof include methyltetrahydrophthalic anhydride, methylhexahydrophthalic anhydride, dodecenyl succinic anhydride, methylendomethylenetetrahydrophthalic anhydride, and the like. Can be mentioned.
- solid acid anhydrides for example, phthalic anhydride, tetrahydrophthalic anhydride, hexahydrophthalic anhydride, methylcyclohexene dicarboxylic acid anhydride, etc.
- a curing agent (D) by dissolving in an anhydride to form a liquid mixture.
- curing agent (D) can be used individually by 1 type or in combination of 2 or more types.
- the curing agent (D) commercially available products such as trade name “Rikacid MH-700” (manufactured by Shin Nippon Rika Co., Ltd.) and trade name “HN-5500” (manufactured by Hitachi Chemical Co., Ltd.) are used. It can also be used.
- the amount of the curing agent (D) used is not particularly limited, but is preferably 50 to 150 parts by weight, more preferably 52 parts based on the total epoxy group-containing resin (100 parts by weight) contained in the curable epoxy resin composition. Is 145 parts by weight, more preferably 55 to 140 parts by weight. More specifically, it is preferably used in a ratio of 0.5 to 1.5 equivalents per 1 equivalent of epoxy groups in all the epoxy group-containing compounds contained in the curable epoxy resin composition.
- curing agent (D) is less than 50 weight part, hardening will become inadequate and there exists a tendency for the toughness of hardened
- curing agent (D) exceeds 150 weight part, hardened
- the curing accelerator (E) is a compound having a function of accelerating the curing rate when the compound having an epoxy group is cured by the curing agent (D).
- the curing accelerator (E) a well-known and commonly used curing accelerator can be used, and is not particularly limited.
- DBU 1,8-diazabicyclo [5.4.0] undecene-7
- DBN 1,5-diazabicyclo [4.3.0] nonene-5
- salts thereof eg, phosphonium salt, sulfonium salt, quaternary ammonium salt, iodonium salt
- tertiary amine such as benzyldimethylamine, 2,4,6-tris (dimethylaminomethyl) phenol, N, N-dimethylcyclohexylamine
- Imidazoles such as ethyl-4-methylimidazole and 1-cyanoethyl-2-ethyl-4-methylimidazole
- Le phosphines such as triphenylphosphine; tetraphenylphosphonium
- the amount of the curing accelerator (E) used is not particularly limited, but is preferably 0.05 to 5 parts by weight with respect to the total epoxy group-containing resin (100 parts by weight) contained in the curable epoxy resin composition.
- the amount is preferably 0.1 to 3 parts by weight, more preferably 0.2 to 3 parts by weight, and particularly preferably 0.25 to 2.5 parts by weight.
- the usage-amount of a hardening accelerator (E) is less than 0.05 weight part, the hardening promotion effect may become inadequate.
- the curing catalyst (F) in the present invention has a function of initiating polymerization of an epoxy compound in the curable epoxy resin composition.
- a cationic polymerization initiator that generates cationic species by ultraviolet irradiation or heat treatment to initiate polymerization of the rubber particle-dispersed epoxy compound (A) is preferable.
- a curing catalyst (F) can be used individually by 1 type or in combination of 2 or more types.
- Examples of the cationic polymerization initiator that generates cationic species upon irradiation with ultraviolet rays include hexafluoroantimonate salts, pentafluorohydroxyantimonate salts, hexafluorophosphate salts, hexafluoroarsenate salts, and the like.
- Examples of such cationic polymerization initiators include trade names “UVACURE1590” (manufactured by Daicel Cytec Co., Ltd.), trade names “CD-1010”, “CD-1011”, “CD-1012” (above, the United States).
- Examples of the cationic polymerization initiator that generates cationic species by heat treatment include aryl diazonium salts, aryl iodonium salts, aryl sulfonium salts, and allene-ion complexes.
- Examples of such cationic polymerization initiators include trade names “PP-33”, “CP-66”, “CP-77” (manufactured by ADEKA Corporation), trade names “FC-509” (3M).
- Product name “UVE1014” (manufactured by GE Corp.), product names “Sun-Aid SI-60L”, “Sun-Aid SI-80L”, “Sun-Aid SI-100L”, “Sun-Aid SI-110L” ”,“ Sun-Aid SI-150L ”(manufactured by Sanshin Chemical Industry Co., Ltd.) and trade name“ CG-24-61 ”(manufactured by Ciba Japan Co., Ltd.) can be preferably used. .
- a chelate compound of a metal such as aluminum or titanium and a acetoacetate or diketone compound and a silanol such as triphenylsilanol or a chelate compound of a metal such as aluminum or titanium and acetoacetate or diketone and bisphenol S Compounds with phenols such as can also be used as the cationic polymerization initiator.
- the amount of the curing catalyst (F) used is not particularly limited, but is preferably 0.01 to 15 parts by weight, more preferably based on the total epoxy group-containing resin (100 parts by weight) contained in the curable epoxy resin composition. Is 0.01 to 12 parts by weight, more preferably 0.05 to 10 parts by weight, and particularly preferably 0.1 to 10 parts by weight. By using the curing catalyst (F) within the above range, a cured product having excellent heat resistance, transparency and light resistance can be obtained.
- the curable epoxy resin composition of the present invention may contain an alicyclic epoxy compound that does not contain rubber particles.
- the alicyclic epoxy compound represented by said Formula (1) can be mentioned.
- the use amount (blending amount) of the alicyclic epoxy compound not containing rubber particles is preferably less than 70% by weight with respect to the total epoxy group-containing resin (100% by weight) contained in the curable epoxy resin composition. Preferably it is less than 50% by weight.
- the amount of the alicyclic epoxy compound containing no rubber particles exceeds 70% by weight of the total epoxy group-containing resin, the crack resistance of the resulting cured product tends to decrease.
- the curable epoxy resin composition of the present invention includes a glycidyl ether type epoxy compound having an aromatic ring such as bisphenol A type or bisphenol F type; a glycidyl having no aromatic ring such as hydrogenated bisphenol A type or aliphatic glycidyl type.
- An ether type epoxy compound (excluding aliphatic polyglycidyl ether (C)); a glycidyl ester type epoxy compound; a glycidyl amine type epoxy compound; a polyol compound; an oxetane compound;
- epoxy compound which is solid at normal temperature (25 ° C.) examples include solid bisphenol-type epoxy compounds, novolac-type epoxy compounds, glycidyl esters, triglycidyl isocyanurate, and 2,2-bis (hydroxymethyl) -1-butanol.
- epoxy compounds that are solid at room temperature (25 ° C.) include solid bisphenol-type epoxy compounds, novolac-type epoxy compounds, glycidyl esters, triglycidyl isocyanurate, and 2,2-bis (hydroxymethyl) -1-butanol.
- examples include 1,2-epoxy-4- (2-oxiranyl) cyclohexane adduct (trade name “EHPE3150”, manufactured by Daicel Chemical Industries, Ltd.). These epoxy compounds can be used alone or in combination of two or more.
- the curable epoxy resin composition of the present invention includes a glycidyl ether epoxy compound having no aromatic ring (in addition to the above-mentioned curing agent (D), curing accelerator (E), and curing catalyst (F)).
- High temperature resistance is impaired if it contains a polyol compound (excluding polyether polyol and aliphatic polyglycidyl ether (C)) that is liquid at 25 ° C. and / or an aliphatic polyglycidyl ether (C))
- the glycidyl ether epoxy compound having no aromatic ring in the present invention includes an aliphatic glycidyl ether epoxy compound and a compound obtained by hydrogenating an aromatic glycidyl ether epoxy compound.
- the above-mentioned aliphatic polyglycidyl ether (C) is not included in the glycidyl ether-based epoxy compound having no aromatic ring.
- product names “EPICLON 703”, “EPICLON 707”, “EPICLON 720”, “EPICLON 725” (hereinafter, manufactured by DIC Corporation), product names “YH-300”, “YH-315”, “YH-324”, “YH-324”, “PG-202”, “PG-207”, “Santoto ST-3000” (manufactured by Toto Kasei Co., Ltd.), trade names “Rikaresin DME-100”, “Rikaresin HBE-100” (above, Shin Nippon Rika ( Product names “Denacol EX-212”, “Denacol EX-321” (above, manufactured by Nagase ChemteX Corp.), trade names “YX8000”, “YX8034” (above, Japan Epoxy Resins Co., Ltd.) (Commercially available products) can be preferably used.
- the glycidyl ether type epoxy compound which does not have an aromatic ring can be used individually
- the amount of the glycidyl ether-based epoxy compound having no aromatic ring is not particularly limited, but is preferably 10 to 50 parts by weight, more preferably 10 to 30 parts by weight with respect to 100 parts by weight of the alicyclic epoxy compound. It is.
- the polyol compound exhibiting a liquid state at 25 ° C. in the present invention includes polyol compounds other than polyether polyol, for example, polyester polyol and polycarbonate polyol.
- polyether polyol for example, polyester polyol and polycarbonate polyol.
- the above-mentioned aliphatic polyglycidyl ether (C) is not included in the polyol compound exhibiting a liquid state at 25 ° C.
- the polyol compound which exhibits liquid state at 25 degreeC can be used individually by 1 type or in combination of 2 or more types.
- polyester polyol examples include, for example, trade names "Placcel 205", “Placcel 205H”, “Placcel 205U”, “Placcel 205BA”, “Placcel 208", "Placcel 210", “Placcel 210CP”, “Placcel 210BA”, “Placcel 212”, “Plaxel 212CP”, “Plaxel 220”, “Plaxel 220CPB”, “Plaxel 220NP1”, “Plaxel 220BA”, “Plaxel 220ED”, “Plaxel 220EB”, “Plaxel 220EC”, “Plaxel 230”, “Plaxel 230CP”, “Plaxel 240”, “Plaxel 240CP”, “Plaxel 210N”, “Plaxel 220N”, “Plaxel L205AL”, “Plaxel L208” L, Plaxel L212AL, Plaxel L220AL, Plaxel L230AL, Plaxel 305, Plaxe
- polycarbonate polyol examples include trade names “Placcel CD205PL”, “Placcel CD205HL”, “Placcel CD210PL”, “Placcel CD210HL”, “Placcel CD220PL”, “Placcel CD220HL” (manufactured by Daicel Chemical Industries, Ltd.), trade names “UH-CARB50”, “UH-CARB100”, “UH-CARB300”, “UH-CARB90 (1/3)”, “UH-CARB90 (1/1)”, “UC-CARB100” (Ube Industries, Ltd.) )), Trade names such as “PCDL T4671”, “PCDL T4672”, “PCDL T5650J”, “PCDL T5651”, “PCDL T5652” (manufactured by Asahi Kasei Chemicals Corporation) can be used.
- the amount of the polyol compound that exhibits a liquid state at 25 ° C. is not particularly limited, but is preferably 5 to 50 parts by weight, more preferably 10 to 40 parts by weight with respect to 100 parts by weight of the rubber particle-dispersed epoxy compound (A). Part.
- the curable epoxy resin composition of the present invention can use various additives within a range that does not impair the effects of the present invention.
- a compound having a hydroxyl group such as ethylene glycol, diethylene glycol, propylene glycol, or glycerin
- the reaction can be allowed to proceed slowly.
- silicone and fluorine antifoaming agents, leveling agents, silane coupling agents such as ⁇ -glycidoxypropyltrimethoxysilane, surfactants, fillers, etc. as long as the viscosity and transparency are not impaired.
- Conventional additives such as a flame retardant, a colorant, an antioxidant, an ultraviolet absorber, an ion adsorbent, a pigment, and a release agent can be used.
- the amount of these additives used is preferably 5% by weight or less based on the total amount of the curable epoxy resin composition (100% by weight).
- the method for producing the curable epoxy resin composition of the present invention is not particularly limited, and a known and commonly used method can be used. Specifically, for example, a predetermined amount of rubber particle-dispersed epoxy compound (A), alumina (B), aliphatic polyglycidyl ether (C), curing agent (D), curing accelerator (E), or predetermined amount
- the rubber particle-dispersed epoxy compound (A), alumina (B), aliphatic polyglycidyl ether (C), curing catalyst (F), and optional additives are blended, and various mixers such as a dissolver and a homogenizer, a kneader, Examples thereof include a method of stirring and mixing with a roll, a bead mill, a self-revolving stirring device and the like. Further, after stirring and mixing, defoaming may be performed under vacuum.
- the curable epoxy resin composition of the present invention can be cured by heating and / or irradiation with light such as ultraviolet rays.
- the cured product obtained by curing the curable epoxy resin composition of the present invention can exhibit higher crack resistance while maintaining high heat resistance, light resistance, and transparency.
- the curable epoxy resin composition of the present invention can be preferably used as a sealing application for optical semiconductors, an adhesive application for electronic parts, a sheet for liquid crystal panels, a sealer, and the like. Especially, it can use especially preferably as a resin composition for optical semiconductor sealing.
- the optical semiconductor device of the present invention is formed by sealing an optical semiconductor element with the curable epoxy resin composition of the present invention used for sealing an optical semiconductor element.
- the method for sealing the optical semiconductor element is not particularly limited, and a well-known and commonly used method can be used. Examples thereof include a potting method, a casting method, and a printing method.
- an optical semiconductor device in which an optical semiconductor element is sealed can be obtained by injecting the curable epoxy resin composition of the present invention into a predetermined mold and heat curing.
- the heating temperature is 80 to 200 ° C. (preferably 80 to 190 ° C., more preferably 80 to 180 ° C.)
- the heating time is 30 to 600 minutes (preferably 45 to 540 minutes, more preferably 60 to 480 minutes), for example, it is preferable to shorten the heating time when the heating temperature is high, and lengthen the heating time when the heating temperature is low.
- the heating temperature and the heating time are below the above ranges, curing tends to be insufficient.
- the resin component may be decomposed.
- the heat curing treatment may be performed in one step, or may be performed in stages by performing heat treatment in multiple stages.
- the curing agent (D) when used, the first stage is heated at a temperature of 80 to 150 ° C. (preferably 100 to 140 ° C.) for 30 to 300 minutes (preferably 45 to 270 minutes).
- the second stage it is preferable to cure by heating at a temperature of 100 to 200 ° C. (preferably 110 to 180 ° C.) for 30 to 600 minutes (preferably 45 to 540 minutes).
- the curing catalyst (F) when used, as the first stage, it is heated at a temperature of 30 to 150 ° C. (preferably 40 to 140 ° C.) for 30 to 300 minutes (preferably 45 to 270 minutes), As a step, it is preferable to cure by heating at a temperature of 60 to 200 ° C. (preferably 80 to 180 ° C.) for 30 to 600 minutes.
- the optical semiconductor element is sealed with the curable epoxy resin composition of the present invention, it is possible to maintain an excellent luminous intensity for a long period of time. For this reason, high performance can be continuously exhibited for a long period of time, and high reliability can be obtained as a long-life optical semiconductor device.
- the average particle size and the maximum particle size of the rubber particles are determined based on a nanotrac TM particle size distribution measuring device (trade name “UPA-EX150”, manufactured by Nikkiso Co., Ltd.) using the dynamic light scattering method as a measurement principle. ) Is used to measure the following sample, and in the obtained particle size distribution curve, the average particle size, which is the particle size when the cumulative curve becomes 50%, is the average particle size, and the frequency (%) of the particle size distribution measurement result is The maximum particle size at the time when it exceeded 0.00% was defined as the maximum particle size.
- sample A sample obtained by dispersing 1 part by weight of a rubber particle-dispersed epoxy compound (A) in 20 parts by weight of tetrahydrofuran was used as a sample.
- the rubber particles have a refractive index of 1 g of rubber particles cast into a mold and compression molded at 210 ° C. and 4 MPa to obtain a flat plate having a thickness of 1 mm. From the obtained flat plate, a test piece of 20 mm length ⁇ 6 mm width is cut out. The test was conducted using a multi-wavelength Abbe refractometer (trade name “DR-M2”, manufactured by Atago Co., Ltd.) in a state where the prism and the test piece were in close contact using monobromonaphthalene as an intermediate solution. It calculated
- the viscosity of the rubber particle-dispersed epoxy compound (A) obtained in the following production example (5 parts by weight of rubber particles dispersed in 100 parts by weight of Celoxide 2021P (manufactured by Daicel Chemical Industries, Ltd.)) is a digital viscometer ( Using a trade name “DVU-EII type” (manufactured by Tokimec Co., Ltd.), the viscosity at 25 ° C. was measured.
- Production Example 1 In a 1 L polymerization vessel equipped with a reflux condenser, 500 g of ion-exchanged water and 0.68 g of sodium dioctylsulfosuccinate were charged, and the temperature was raised to 80 ° C. while stirring under a nitrogen stream.
- a monomer mixture consisting of 9.5 g of butyl acrylate, 2.57 g of styrene, and 0.39 g of divinylbenzene corresponding to about 5% by weight of the amount required to form the core portion is collectively collected.
- the mixture was cooled to room temperature (25 ° C.) and filtered through a plastic mesh having an opening of 120 ⁇ m to obtain a latex containing particles having a core-shell structure.
- the obtained latex was frozen at ⁇ 30 ° C., dehydrated and washed with a suction filter, and then blown and dried at 60 ° C. overnight to obtain rubber particles (1).
- the obtained rubber particles (1) had an average particle size of 254 nm, a maximum particle size of 486 nm, and a refractive index of 1.500.
- Rubber particles (2) were obtained in the same manner as in Production Example 1, except that 2.7 g of 2-hydroxyethyl methacrylate was used instead of 1.5 g of acrylic acid.
- the obtained rubber particles (2) had an average particle size of 261 nm, a maximum particle size of 578 nm, and a refractive index of 1.500.
- a rubber particle-dispersed epoxy compound (A-2) (viscosity at 25 ° C .: 512 mPa ⁇ s) was obtained in the same manner as in Production Example 1.
- Production Example 3 In a 1 L polymerization vessel equipped with a reflux condenser, 500 g of ion-exchanged water and 1.3 g of sodium dioctylsulfosuccinate were charged, and the temperature was raised to 80 ° C. while stirring under a nitrogen stream.
- a monomer mixture consisting of 9.5 g of butyl acrylate, 2.57 g of styrene, and 0.39 g of divinylbenzene corresponding to about 5% by weight of the amount required to form the core portion is collectively collected.
- rubber particles (3) were obtained in the same manner as in Production Example 1 except that the amount of acrylic acid used was changed from 1.5 g to 2.0 g.
- the rubber particles (3) obtained had an average particle size of 108 nm, a maximum particle size of 289 nm, and a refractive index of 1.500.
- a rubber particle-dispersed epoxy resin (A-3) (viscosity at 25 ° C .: 1036 mPa ⁇ s) was obtained in the same manner as in Production Example 1.
- the curable epoxy resin composition obtained above was cast into an optical semiconductor lead frame (AlInGaP element, 3.5 mm ⁇ 2.8 mm) as shown in FIGS. For 3 hours (primary curing), followed by heating at 140 ° C. for 4 hours (secondary curing) to obtain an optical semiconductor device in which the optical semiconductor element is sealed with a cured product of the curable epoxy resin composition. It was.
- 100 is a reflector (light reflecting resin composition)
- 101 is a metal wiring
- 102 is an LED element
- 103 is a bonding wire
- 104 is a transparent sealing resin (cured product)
- 105 is a package resin. Indicates.
- Examples 4-6, Comparative Examples 6-10 First, according to the formulation shown in Table 2 (unit: parts by weight), a curing agent (manufactured by Shin Nippon Rika Co., Ltd., “Licacid MH-700”), a curing accelerator (manufactured by San Apro Co., Ltd., “U-CAT 18X”). )) And additives (made by Wako Pure Chemical Industries, Ltd., ethylene glycol) using a self-revolving stirrer (trade name “Awatori Netaro AR-250”, manufactured by Shinky Corp.) And then defoamed to prepare a curing agent composition.
- a curing agent manufactured by Shin Nippon Rika Co., Ltd., “Licacid MH-700”
- a curing accelerator manufactured by San Apro Co., Ltd., “U-CAT 18X”.
- additives made by Wako Pure Chemical Industries, Ltd., ethylene glycol
- a self-revolving stirrer trade name “Awatori Net
- each component was uniformly mixed using a self-revolving stirrer (trade name “Awatori Nerita AR-250”, manufactured by Shinky Corporation). (2000 rpm, 5 minutes) and defoamed to prepare a curable epoxy resin composition.
- the curable epoxy resin composition obtained above was cast into a mold and heated to obtain a cured product. In either case (Examples 4 to 6, Comparative Examples 6 to 10), heating at 110 ° C. for 3 hours (primary curing), followed by heating at 140 ° C. for 4 hours (secondary curing) Cured.
- the curable epoxy resin composition obtained above was cast into an optical semiconductor lead frame (AlInGaP element, 3.5 mm ⁇ 2.8 mm) as shown in FIGS. For 3 hours (primary curing), followed by heating at 140 ° C. for 4 hours (secondary curing) to obtain an optical semiconductor device in which the optical semiconductor element is sealed with a cured product of the curable epoxy resin composition. It was.
- a digital microscope (product shown in FIG. 4) is formed between the reflector and the package substrate of the optical semiconductor device (20 produced for each curable epoxy resin composition) obtained in Examples and Comparative Examples. Using the name “VHX-900” (manufactured by Keyence Co., Ltd.), the observation was performed at a measurement magnification of 100 times. When any one of the optical semiconductor devices has a resin (cured product) leak at the above location, the resin leak is “present”, and any optical semiconductor device has a resin (cured product) leak at the above location. The case where it was not recognized was evaluated as “no resin leakage”.
- Total luminous flux before energization (0 hours) The total luminous flux (initial value of the total luminous flux) before energization (0 hours) of the optical semiconductor device obtained in the examples and comparative examples was converted into a total luminous flux measuring device (trade name “OL771 Multi-spectral Radiation Measurement System”, Optronic Laboratories. ).
- Thermal shock test (heat shock test) It was confirmed that there were no cracks in all of the optical semiconductor devices (20 produced for each curable epoxy resin composition) obtained in the examples and comparative examples, and a thermal shock device (trade name “TSE-11-A”, Using ESPEC Co., Ltd., 30 cycles of exposure to 100 ° C., followed by exposure to minus 40 ° C. for 30 minutes was taken as one cycle, and this was repeated 2000 cycles. The presence or absence of cracks in the optical semiconductor device is checked every 200 cycles, and in any of the 20 optical semiconductor devices, the number of cycles when cracks are first observed (the number of cycles in which cracks are first generated) ) Was recorded.
- the number of optical semiconductor devices in which cracks occurred among the 20 optical semiconductor devices was recorded.
- the presence or absence of cracks was confirmed by observation using a digital microscope (trade name “VHX-900”, manufactured by Keyence Corporation).
- Table 1 and Table 2 Abbreviations in Table 1 and Table 2 are as follows. “YD8125”: bisphenol A type epoxy resin, manufactured by Tohto Kasei Co., Ltd. “YX8034”: hydrogenated bisphenol A type epoxy resin, manufactured by Mitsubishi Chemical Corporation “YH300”: trimethylolpropane triglycidyl ether (viscosity (25 ° C.)) : 140 mPa ⁇ s), manufactured by Toto Kasei Co., Ltd. “AO802”: Alumina (average particle size: 0.7 ⁇ m, shape: true spherical shape, production method: VMC method), manufactured by Admatechs Co., Ltd.
- the cured product of the composition has high heat resistance, light resistance, and transparency. Excellent crack resistance. Furthermore, no resin leakage from the package occurred.
- alumina (B) and aliphatic polyglycidyl ether (C) is not included (comparative example)
- a problem occurs in the thermal shock test and / or evaluation of the presence or absence of resin leakage from the package. It was.
- the rubber particle dispersed epoxy compound (A-2) and the rubber particle dispersed epoxy compound (A-3) are used instead of the rubber particle dispersed epoxy compound (A-1), the same result as above is obtained. Obtained.
- the curable epoxy resin composition of the present invention can be preferably used in various fields including uses such as sealing materials for electrical / electronic related to optical semiconductors.
- the obtained optical semiconductor device can continue to exhibit high performance for a long period of time, and high reliability can be obtained as a long-life optical semiconductor device.
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Abstract
Description
本発明の他の目的は、上記硬化性エポキシ樹脂組成物を使用して光半導体素子を封止した光半導体装置を提供することにある。
本発明の硬化性エポキシ樹脂組成物は、ゴム粒子を脂環式エポキシ化合物に分散させたゴム粒子分散エポキシ化合物(A)を含み、該ゴム粒子は、(メタ)アクリル酸エステルを必須モノマー成分とするポリマーで構成され、表面にヒドロキシル基及び/又はカルボキシル基を有し、平均粒子径が10nm~500nm、最大粒子径が50nm~1000nmであり、該ゴム粒子の屈折率と当該硬化性エポキシ樹脂組成物の硬化物の屈折率との差が±0.03以内である。本発明の硬化性エポキシ樹脂組成物は、上記ゴム粒子分散エポキシ化合物(A)に加え、さらに、アルミナ(B)と、25℃における粘度が8000mPa・s以上の脂肪族ポリグリシジルエーテル(C)とを含むことを特徴としている。
本発明の硬化性エポキシ樹脂組成物におけるゴム粒子分散エポキシ化合物(A)は、(メタ)アクリル酸エステルを必須モノマー成分とするポリマーで構成されており、表面に脂環式エポキシ化合物と反応し得る官能基としてヒドロキシル基及び/又はカルボキシル基を有し、平均粒子径が10nm~500nm、最大粒子径が50nm~1000nmであるゴム粒子であって、該ゴム粒子の屈折率と当該硬化性エポキシ樹脂組成物の硬化物の屈折率との差が±0.03以内であるゴム粒子を、脂環式エポキシ化合物に分散させてなるゴム粒子分散エポキシ化合物(ゴム粒子分散エポキシ樹脂)である。
本発明におけるゴム粒子は、ゴム弾性を有するコア部分と、該コア部分を被覆する少なくとも1層のシェル層とからなる多層構造(コアシェル構造)を有する。また、上記ゴム粒子は、(メタ)アクリル酸エステルを必須モノマー成分とするポリマーで構成されており、表面に脂環式エポキシ化合物と反応し得る官能基としてヒドロキシル基及び/又はカルボキシル基(ヒドロキシル基及びカルボキシル基のいずれか一方又は両方)を有する。ヒドロキシル基及び/又はカルボキシル基がゴム粒子表面に存在しない場合、冷熱サイクル等の熱衝撃により硬化物が白濁して透明性が低下するため好ましくない。
本発明におけるゴム粒子分散エポキシ化合物(A)を構成する脂環式エポキシ化合物(脂環式エポキシ樹脂)は、脂環を構成する隣接する2つの炭素原子と酸素原子とで構成されるエポキシ基を有する脂環式化合物であり、周知慣用のものの中から任意に選択して使用することができる。上記脂環式エポキシ化合物は、調合時、及び注型時の作業性の点から、常温(25℃)で液状を呈するものが好ましい。
本発明の硬化性エポキシ樹脂組成物におけるアルミナ(B)は、封止の際のパッケージからの樹脂漏れを防止し、さらに、硬化物の耐クラック性を向上させる役割を担う。アルミナ(B)としては、特に限定されず、公知慣用のアルミナ(酸化アルミニウム)粒子を用いることができる。なお、アルミナ(B)は1種を単独で、又は2種以上を組み合わせて使用することができる。
本発明の硬化性エポキシ樹脂組成物における脂肪族ポリグリシジルエーテル(C)は、硬化物の耐クラック性を向上させる役割を担う。本発明における脂肪族ポリグリシジルエーテル(C)は、脂肪族ポリオールの水酸基の一部又は全部がグリシジルエーテル化された化合物である。なお、上記「脂肪族ポリオール」とは、鎖状(直鎖状、分岐鎖状)の炭化水素の2以上の水素原子を、水酸基(アルコール性水酸基)に置換した化合物をいう。上記脂肪族ポリオールとしては、特に限定されないが、例えば、ソルビトールなどが挙げられる。なお、脂肪族グリシジルエーテル(C)は1種を単独で、又は2種以上を組み合わせて使用することができる。
硬化剤(D)は、エポキシ基を有する化合物を硬化させる働きを有する。硬化剤(D)としては、エポキシ樹脂用硬化剤として周知慣用の硬化剤を使用することができる。硬化剤(D)としては、中でも、25℃で液状の酸無水物が好ましく、例えば、メチルテトラヒドロ無水フタル酸、メチルヘキサヒドロ無水フタル酸、ドデセニル無水コハク酸、メチルエンドメチレンテトラヒドロ無水フタル酸などが挙げられる。また、常温(25℃)で固体状の酸無水物(例えば、無水フタル酸、テトラヒドロ無水フタル酸、ヘキサヒドロ無水フタル酸、メチルシクロヘキセンジカルボン酸無水物など)は、常温(25℃)で液状の酸無水物に溶解させて液状の混合物とすることで、硬化剤(D)として使用することができる。なお、硬化剤(D)は1種を単独で、又は2種以上を組み合わせて使用することができる。
硬化促進剤(E)は、エポキシ基を有する化合物が硬化剤(D)により硬化する際に、硬化速度を促進する機能を有する化合物である。硬化促進剤(E)としては、周知慣用の硬化促進剤を使用することができ、特に限定されないが、例えば、1,8-ジアザビシクロ[5.4.0]ウンデセン-7(DBU)、及びその塩(例えば、フェノール塩、オクチル酸塩、p-トルエンスルホン酸塩、ギ酸塩、テトラフェニルボレート塩);1,5-ジアザビシクロ[4.3.0]ノネン-5(DBN)、及びその塩(例えば、ホスホニウム塩、スルホニウム塩、4級アンモニウム塩、ヨードニウム塩);ベンジルジメチルアミン、2,4,6-トリス(ジメチルアミノメチル)フェノール、N,N-ジメチルシクロヘキシルアミンなどの3級アミン;2-エチル-4-メチルイミダゾール、1-シアノエチル-2-エチル-4-メチルイミダゾールなどのイミダゾール;リン酸エステル、トリフェニルホスフィンなどのホスフィン類;テトラフェニルホスホニウムテトラ(p-トリル)ボレートなどのホスホニウム化合物;オクチル酸スズ、オクチル酸亜鉛などの有機金属塩;金属キレートなどが挙げられる。これらは単独で、又は2種以上を混合して使用することができる。
本発明における硬化触媒(F)は、硬化性エポキシ樹脂組成物中のエポキシ化合物の重合を開始させる働きを有する。硬化触媒(F)としては、紫外線照射又は加熱処理を施すことによりカチオン種を発生して、ゴム粒子分散エポキシ化合物(A)の重合を開始させるカチオン重合開始剤が好ましい。なお、硬化触媒(F)は1種を単独で、又は2種以上を組み合わせて使用することができる。
本発明における芳香環を有しないグリシジルエーテル系エポキシ化合物には、脂肪族グリシジルエーテル系エポキシ化合物、及び、芳香族グリシジルエーテル系エポキシ化合物を核水添した化合物を含む。但し、上記芳香環を有しないグリシジルエーテル系エポキシ化合物には、上記の脂肪族ポリグリシジルエーテル(C)は含まれないものとする。例えば、商品名「EPICLON703」、「EPICLON707」、「EPICLON720」、「EPICLON725」(以上、DIC(株)製)、商品名「YH-300」、「YH-315」、「YH-324」、「PG-202」、「PG-207」、「サントートST-3000」(以上、東都化成(株)製)、商品名「リカレジンDME-100」、「リカレジンHBE-100」(以上、新日本理化(株)製)、商品名「デナコールEX-212」、「デナコールEX-321」(以上、ナガセケムテックス(株)製)、商品名「YX8000」、「YX8034」(以上、ジャパンエポキシレジン(株)製)等の市販品を好ましく使用することができる。なお、芳香環を有しないグリシジルエーテル系エポキシ化合物は1種を単独で、又は2種以上を組み合わせて使用することができる。
本発明における25℃で液状を呈するポリオール化合物には、ポリエーテルポリオール以外のポリオール化合物が含まれ、例えば、ポリエステルポリオール、ポリカーボネートポリオールが含まれる。但し、上記25℃で液状を呈するポリオール化合物には、上記の脂肪族ポリグリシジルエーテル(C)は含まれないものとする。なお、25℃で液状を呈するポリオール化合物は1種を単独で、又は2種以上を組み合わせて使用することができる。
本発明の光半導体装置は、光半導体素子の封止用に用いられる本発明の硬化性エポキシ樹脂組成物によって光半導体素子が封止されてなる。光半導体素子の封止方法としては、特に限定されることなく周知慣用の方法を使用することができ、例えば、ポッティング法、キャスティング法、印刷法などの方法が挙げられる。
試料:
ゴム粒子分散エポキシ化合物(A)1重量部をテトラヒドロフラン20重量部に分散させたものを試料とした。
還流冷却器付きの1L重合容器に、イオン交換水500g、及びジオクチルスルホコハク酸ナトリウム0.68gを仕込み、窒素気流下に撹拌しながら、80℃に昇温した。ここに、コア部分を形成するために必要とする量の約5重量%分に該当するアクリル酸ブチル9.5g、スチレン2.57g、及びジビニルベンゼン0.39gからなる単量体混合物を、一括添加し、20分間撹拌して乳化させた後、ペルオキソ二硫酸カリウム9.5mgを添加し、1時間撹拌して最初のシード重合を行い、続いて、ペルオキソ二硫酸カリウム180.5mgを添加し、5分間撹拌した。ここに、コア部分を形成するために必要とする量の残り(約95重量%分)のアクリル酸ブチル180.5g、スチレン48.89g、及びジビニルベンゼン7.33gにジオクチルスルホコハク酸ナトリウム0.95gを溶解させてなる単量体混合物を2時間かけて連続的に添加し、2度目のシード重合を行い、その後、1時間熟成してコア部分を得た。
アクリル酸1.5gの代わりに2-ヒドロキシエチルメタクリレート2.7gを使用した以外は製造例1と同様にして、ゴム粒子(2)を得た。得られたゴム粒子(2)の平均粒子径は261nm、最大粒子径は578nm、屈折率は1.500であった。
さらに、上記ゴム粒子(2)を用いて、製造例1と同様にしてゴム粒子分散エポキシ化合物(A-2)(25℃での粘度:512mPa・s)を得た。
還流冷却器付きの1L重合容器に、イオン交換水500g、及びジオクチルスルホコハク酸ナトリウム1.3gを仕込み、窒素気流下に撹拌しながら、80℃に昇温した。ここに、コア部分を形成するために必要とする量の約5重量%分に該当するアクリル酸ブチル9.5g、スチレン2.57g、及びジビニルベンゼン0.39gからなる単量体混合物を、一括添加し、20分間撹拌して乳化させた後、ペルオキソ二硫酸カリウム12mgを添加し、1時間撹拌して最初のシード重合を行い、続いて、ペルオキソ二硫酸カリウム228mgを添加し、5分間撹拌した。ここに、コア部分を形成するために必要とする量の残り(約95重量%分)のアクリル酸ブチル180.5g、スチレン48.89g、及びジビニルベンゼン7.33gにジオクチルスルホコハク酸ナトリウム1.2gを溶解させてなる単量体混合物を2時間かけて連続的に添加し、2度目のシード重合を行い、その後、1時間熟成してコア部分を得た。
さらに、上記ゴム粒子(3)を用いて、製造例1と同様にしてゴム粒子分散エポキシ樹脂(A-3)(25℃での粘度:1036mPa・s)を得た。
表1に示す配合処方(単位:重量部)に従って、各成分を、自公転式撹拌装置(商品名「あわとり練太郎AR-250」、シンキー(株)製)を使用して均一に混合し(2000rpm、5分間)、脱泡して、硬化性エポキシ樹脂組成物を得た。
次いで、上記で得られた硬化性エポキシ樹脂組成物を型に注型し、加熱して硬化物を得た。なお、いずれの場合(実施例1~3、比較例1~5)にも、110℃で3時間加熱(一次硬化)し、続いて、140℃で4時間加熱(二次硬化)することによって硬化させた。
また、別途、上記で得られた硬化性エポキシ樹脂組成物を、図1~4に示すように光半導体のリードフレーム(AlInGaP素子、3.5mm×2.8mm)に注型した後、110℃で3時間加熱(一次硬化)し、続いて、140℃で4時間加熱(二次硬化)することで、硬化性エポキシ樹脂組成物の硬化物により光半導体素子を封止した光半導体装置を得た。なお、図1~4において、100はリフレクター(光反射用樹脂組成物)、101は金属配線、102はLED素子、103はボンディングワイヤ、104は透明封止樹脂(硬化物)、105はパッケージ樹脂を示す。
まず、表2に示す配合処方(単位:重量部)に従って、硬化剤(新日本理化(株)製、「リカシッド MH-700」)、硬化促進剤(サンアプロ(株)製、「U-CAT 18X」)、及び添加剤(和光純薬工業(株)製、エチレングリコール)を、自公転式攪拌装置(商品名「あわとり練太郎AR-250」、シンキー(株)製)を使用して均一に混合し、脱泡して、硬化剤組成物を調製した。
続いて、表2に示す配合処方(単位:重量部)に従って、各成分を、自公転式攪拌装置(商品名「あわとり練太郎AR-250」、シンキー(株)製)を使用して均一に混合し(2000rpm、5分間)、脱泡して、硬化性エポキシ樹脂組成物を調製した。
次いで、上記で得られた硬化性エポキシ樹脂組成物を型に注型し、加熱して硬化物を得た。なお、いずれの場合(実施例4~6、比較例6~10)にも、110℃で3時間加熱(一次硬化)し、続いて、140℃で4時間加熱(二次硬化)することによって硬化させた。
また、別途、上記で得られた硬化性エポキシ樹脂組成物を、図1~4に示すように光半導体のリードフレーム(AlInGaP素子、3.5mm×2.8mm)に注型した後、110℃で3時間加熱(一次硬化)し、続いて、140℃で4時間加熱(二次硬化)することで、硬化性エポキシ樹脂組成物の硬化物により光半導体素子を封止した光半導体装置を得た。
実施例及び比較例で得られた硬化物から、縦20mm×横6mm×厚さ1mmの試験片を切り出し、中間液としてモノブロモナフタレンを使用してプリズムと該試験片とを密着させ、多波長アッベ屈折計(商品名「DR-M2」、(株)アタゴ製)を使用し、20℃、ナトリウムD線で、硬化物の屈折率を測定した。そして、下記式に従って、屈折率差を算出した。
屈折率差=[ゴム粒子の屈折率]-[硬化物の屈折率]
実施例及び比較例で得られた光半導体装置(各硬化性エポキシ樹脂組成物につき20個作製した)のリフレクターとパッケージ基板との間(図4において106で示される部分)をデジタルマイクロスコープ(商品名「VHX-900」、(株)キーエンス製)を用いて、測定倍率100倍の条件で観察した。光半導体装置のいずれか1つについて上記箇所に樹脂(硬化物)の漏れが認められた場合を樹脂漏れ「有り」とし、いずれの光半導体装置にも上記箇所に樹脂(硬化物)の漏れが認められなかった場合を樹脂漏れ「無し」と評価した。
実施例及び比較例で得られた光半導体装置の通電前(0時間)の全光束(全光束の初期値)を、全光束測定機(商品名「OL771マルチ分光放射測定システム」、オプトロニックラボラトリーズ製)を用いて測定した。
実施例及び比較例で得られた光半導体装置の全光束を、全光束測定機を用いて測定した(0時間)。さらに、85℃の恒温槽内で3000時間、100mAの電流を流した後の全光束を、全光束測定機を用いて測定した。そして、次式から、光度保持率(相対光度)を算出した。
{光度保持率(相対光度)(%)}
=({3000時間通電後の全光束(lm)}/{0時間の全光束(lm)})×100
実施例及び比較例で得られた光半導体装置の全光束を、全光束測定機を用いて測定した(0時間)。さらに、60℃、90%RHの恒温槽内で3000時間、13mAの電流を流した後の全光束を、全光束測定機を用いて測定した。そして、次式から、光度保持率(相対光度)を算出した。
{光度保持率(相対光度)(%)}
=({3000時間通電後の全光束(lm)}/{0時間の全光束(lm)})×100
実施例及び比較例で得られた光半導体装置(各硬化性エポキシ樹脂組成物につき20個作製した)全てについてクラックがないことを確認し、冷熱衝撃装置(商品名「TSE-11-A」、エスペック(株)製)を使用して100℃に30分暴露し、続いて、マイナス40℃に30分暴露するのを1サイクルとし、これを2000サイクル繰り返す試験を行った。
上記光半導体装置におけるクラック発生の有無を200サイクル毎に確認し、20個の光半導体装置のいずれかにおいて、最初にクラックの発生が認められた時点のサイクル数(クラックを最初に生じたサイクル数)を記録した。また、2000サイクル後に、20個の光半導体装置のうちクラックが発生していた光半導体装置の数(クラックを生じたパッケージの個数)を記録した。なお、クラック発生の有無は、デジタルマイクロスコープ(商品名「VHX-900」、(株)キーエンス製)を使用して観察することによって確認した。
「YD8125」:ビスフェノールA型エポキシ樹脂、東都化成(株)製
「YX8034」:水添ビスフェノールA型エポキシ樹脂、三菱化学(株)製
「YH300」:トリメチロールプロパントリグリシジルエーテル(粘度(25℃):140mPa・s)、東都化成(株)製
「AO802」:アルミナ(平均粒径:0.7μm、形状:真球状、製造方法:VMC法)、(株)アドマテックス製
「ERISYS GE60」:ソルビトールポリグリシジルエーテル(粘度(25℃):13000mPa・s)、CVC Thermoset Specialties製
「サンエイド SI-150L」:アリールスルホニウム塩、三新化学工業(株)製
「リカシッド MH-700」:4-メチルヘキサヒドロ無水フタル酸/ヘキサヒドロ無水フタル酸=70/30、新日本理化(株)製
「U-CAT 18X」:硬化促進剤、サンアプロ(株)製
「エチレングリコール」:和光純薬工業(株)製
また、ゴム粒子分散エポキシ化合物(A-1)の代わりに、ゴム粒子分散エポキシ化合物(A-2)、ゴム粒子分散エポキシ化合物(A-3)を用いた場合にも、上記と同様の結果が得られた。
101:金属配線
102:LED素子
103:ボンディングワイヤ
104:透明封止樹脂(硬化物)
105:パッケージ樹脂
106:金属配線とリフレクターの隙間(樹脂漏れ有無の評価部分)
Claims (8)
- ゴム粒子を脂環式エポキシ化合物に分散させたゴム粒子分散エポキシ化合物(A)を含む硬化性エポキシ樹脂組成物であって、
さらに、アルミナ(B)と、25℃における粘度が8000mPa・s以上の脂肪族ポリグリシジルエーテル(C)とを含み、
前記ゴム粒子が、(メタ)アクリル酸エステルを必須モノマー成分とするポリマーで構成され、表面にヒドロキシル基及び/又はカルボキシル基を有し、平均粒子径が10nm~500nm、最大粒子径が50nm~1000nmであるゴム粒子であり、
前記ゴム粒子の屈折率と当該硬化性エポキシ樹脂組成物の硬化物の屈折率との差が±0.03以内である硬化性エポキシ樹脂組成物。 - さらに、硬化剤(D)及び硬化促進剤(E)、又は硬化触媒(F)を含む請求項1に記載の硬化性エポキシ樹脂組成物。
- 硬化剤(D)が、25℃で液状の酸無水物である請求項2に記載の硬化性エポキシ樹脂組成物。
- 硬化触媒(F)が、紫外線照射又は加熱処理を施すことによりカチオン種を発生するカチオン重合開始剤である請求項2に記載の硬化性エポキシ樹脂組成物。
- さらに、芳香環を有しないグリシジルエーテル系エポキシ化合物(但し、脂肪族ポリグリシジルエーテル(C)を除く)及び/又は25℃で液状を呈するポリオール化合物(但し、ポリエーテルポリオール及び脂肪族ポリグリシジルエーテル(C)を除く)を含む請求項1~4のいずれか1項に記載の硬化性エポキシ樹脂組成物。
- 脂肪族ポリグリシジルエーテル(C)が、ソルビトールポリグリシジルエーテルである請求項1~5のいずれか1項に記載の硬化性エポキシ樹脂組成物。
- 光半導体封止用である請求項1~6のいずれか1項に記載の硬化性エポキシ樹脂組成物。
- 請求項7に記載の硬化性エポキシ樹脂組成物によって光半導体素子が封止されてなる光半導体装置。
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US13/819,039 US20130158167A1 (en) | 2010-12-20 | 2011-12-13 | Curable epoxy resin composition and optical semiconductor device using said resin composition |
| EP11851643.4A EP2657297A1 (en) | 2010-12-20 | 2011-12-13 | Curable epoxy resin composition and photosemiconductor device using same |
| KR1020137008121A KR20130141473A (ko) | 2010-12-20 | 2011-12-13 | 경화성 에폭시 수지 조성물 및 이것을 사용한 광반도체 장치 |
| CN2011800401073A CN103068917A (zh) | 2010-12-20 | 2011-12-13 | 固化性环氧树脂组合物及使用其的光半导体装置 |
| JP2012549738A JP5918699B2 (ja) | 2010-12-20 | 2011-12-13 | 硬化性エポキシ樹脂組成物及びこれを使用した光半導体装置 |
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| JP2010282995 | 2010-12-20 | ||
| JP2010-282995 | 2010-12-20 |
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| Publication Number | Publication Date |
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| WO2012086463A1 true WO2012086463A1 (ja) | 2012-06-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| PCT/JP2011/078768 Ceased WO2012086463A1 (ja) | 2010-12-20 | 2011-12-13 | 硬化性エポキシ樹脂組成物及びこれを使用した光半導体装置 |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US20130158167A1 (ja) |
| EP (1) | EP2657297A1 (ja) |
| JP (1) | JP5918699B2 (ja) |
| KR (1) | KR20130141473A (ja) |
| CN (1) | CN103068917A (ja) |
| TW (1) | TW201231545A (ja) |
| WO (1) | WO2012086463A1 (ja) |
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| WO2012165413A1 (ja) * | 2011-05-30 | 2012-12-06 | 三菱レイヨン株式会社 | エポキシ樹脂組成物、硬化物及び光半導体封止材料 |
| JP2013100410A (ja) * | 2011-11-09 | 2013-05-23 | Daicel Corp | 硬化性エポキシ樹脂組成物 |
| JP2014084332A (ja) * | 2012-10-19 | 2014-05-12 | Daicel Corp | 硬化性エポキシ樹脂組成物及びその硬化物、並びに光半導体装置 |
| WO2014109212A1 (ja) * | 2013-01-09 | 2014-07-17 | 株式会社ダイセル | 硬化性エポキシ樹脂組成物 |
| JP2017125212A (ja) * | 2017-04-10 | 2017-07-20 | 株式会社ダイセル | 硬化性エポキシ樹脂組成物及びその硬化物、並びに光半導体装置 |
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| JP6107559B2 (ja) * | 2012-11-09 | 2017-04-05 | 豊田合成株式会社 | 発光装置 |
| WO2014192881A1 (ja) * | 2013-05-31 | 2014-12-04 | 積水化学工業株式会社 | 液晶表示素子用シール剤、上下導通材料、液晶表示素子、及び、液晶表示素子用シール剤の製造方法 |
| JP6517043B2 (ja) * | 2015-02-25 | 2019-05-22 | ルネサスエレクトロニクス株式会社 | 光結合装置、光結合装置の製造方法および電力変換システム |
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| KR102389948B1 (ko) * | 2016-11-18 | 2022-04-21 | 가부시끼가이샤 쓰리본드 | 카메라 모듈용 양이온 경화성 접착제 조성물, 경화물 및 접합체 |
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| TWI833059B (zh) * | 2020-04-30 | 2024-02-21 | 日商拓自達電線股份有限公司 | 導電性組成物及使用其之屏蔽封裝體之製造方法 |
| FI20217034A1 (en) * | 2021-02-18 | 2022-08-19 | Teraloop Ltd | Method for producing a composite structure comprising a magnetic filler embedded in a resin matrix |
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| JP2013100410A (ja) * | 2011-11-09 | 2013-05-23 | Daicel Corp | 硬化性エポキシ樹脂組成物 |
| JP2014084332A (ja) * | 2012-10-19 | 2014-05-12 | Daicel Corp | 硬化性エポキシ樹脂組成物及びその硬化物、並びに光半導体装置 |
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| JPWO2014109212A1 (ja) * | 2013-01-09 | 2017-01-19 | 株式会社ダイセル | 硬化性エポキシ樹脂組成物 |
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Also Published As
| Publication number | Publication date |
|---|---|
| JPWO2012086463A1 (ja) | 2014-05-22 |
| US20130158167A1 (en) | 2013-06-20 |
| KR20130141473A (ko) | 2013-12-26 |
| TW201231545A (en) | 2012-08-01 |
| JP5918699B2 (ja) | 2016-05-18 |
| EP2657297A1 (en) | 2013-10-30 |
| CN103068917A (zh) | 2013-04-24 |
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