WO2009088059A1 - 熱硬化性樹脂組成物、エポキシ樹脂成形材料及び多価カルボン酸縮合体 - Google Patents
熱硬化性樹脂組成物、エポキシ樹脂成形材料及び多価カルボン酸縮合体 Download PDFInfo
- Publication number
- WO2009088059A1 WO2009088059A1 PCT/JP2009/050175 JP2009050175W WO2009088059A1 WO 2009088059 A1 WO2009088059 A1 WO 2009088059A1 JP 2009050175 W JP2009050175 W JP 2009050175W WO 2009088059 A1 WO2009088059 A1 WO 2009088059A1
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- WIPO (PCT)
- Prior art keywords
- group
- carboxylic acid
- resin composition
- thermosetting resin
- epoxy resin
- Prior art date
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Images
Classifications
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- 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
- C08G59/4215—Polycarboxylic acids; Anhydrides, halides or low molecular weight esters thereof cycloaliphatic
-
- 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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- 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
- H01L2224/73—Means for bonding being of different types provided for in two or more of groups H01L2224/10, H01L2224/18, H01L2224/26, H01L2224/34, H01L2224/42, H01L2224/50, H01L2224/63, H01L2224/71
- H01L2224/732—Location after the connecting process
- H01L2224/73251—Location after the connecting process on different surfaces
- H01L2224/73265—Layer and wire connectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/483—Containers
- H01L33/486—Containers adapted for surface mounting
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/58—Optical field-shaping elements
- H01L33/60—Reflective elements
Definitions
- the present invention relates to a thermosetting resin composition, an epoxy resin molding material, a substrate for mounting an optical semiconductor element, a manufacturing method thereof, and an optical semiconductor device. Furthermore, this invention relates to the polyhydric carboxylic acid condensate, the hardening
- Optical semiconductor devices combining optical semiconductor elements such as LEDs (Light Emitting Diodes) and phosphors with high energy efficiency and long service life are used for outdoor displays, portable LCD backlights, and in-vehicle applications. That demand is expanding. As a result, the brightness of LED devices is increasing, and it is required to prevent an increase in junction temperature due to an increase in the amount of heat generated by the element and deterioration of the optical semiconductor device due to a direct increase in light energy.
- LEDs Light Emitting Diodes
- phosphors Light Emitting Diodes
- Patent Document 1 discloses a substrate for mounting an optical semiconductor element using a thermosetting resin composition composed of an epoxy resin and a curing agent such as an acid anhydride.
- acid anhydrides are used as curing agents for epoxy resins. Moreover, it is used also as a raw material for obtaining a polyimide compound by reaction with diamine. Acid anhydrides are inexpensive and are excellent in terms of transparency, electrical insulation, chemical resistance, moisture resistance and adhesion. Therefore, acid anhydrides are used in various applications such as electrical insulating materials, semiconductor device materials, optical semiconductor sealing materials, adhesive materials, and paint materials.
- One type of acid anhydride is a polycarboxylic acid anhydride formed by polycondensation of polyvalent carboxylic acids.
- a polycarboxylic acid anhydride obtained by an intermolecular dehydration condensation reaction of an aliphatic dicarboxylic acid such as polyazeline acid or polysebacic acid is a curing agent for a thermosetting resin such as an epoxy resin, a melamine resin, or an acrylic powder paint, It may be used as a curing accelerator.
- Polycarboxylic acid anhydrides obtained by intermolecular dehydration condensation reaction of aliphatic dicarboxylic acids are easy to obtain cured products showing excellent flexibility and thermal shock resistance. Useful as an agent.
- Patent Document 2 discloses a polycarboxylic acid anhydride having a high molecular weight (polyvalent polyhydric acid) having an average molecular weight exceeding 20000, obtained by condensing aliphatic and aromatic dicarboxylic acids between molecules.
- the use of carboxylic acid condensates has been proposed for biomedical applications.
- acid anhydride type curing agents that have been put to practical use as curing agents for thermosetting resins such as epoxy resins are not as rich as polyamines, phenol novolacs, and imidazole type curing agents.
- the above-mentioned polycarboxylic acid anhydrides are not molecularly designed as curing agents for epoxy resins, and their uses are limited.
- the conventional polycarboxylic acid anhydride when used as a curing agent such as an epoxy resin, is advantageous in comparison with a normal acid anhydride curing agent in terms of flexibility and thermal shock resistance of the cured product.
- thermosetting resin composition when a conventional thermosetting resin composition is intended to produce a substrate for mounting an optical semiconductor by transfer molding, the resin composition oozes into the gap between the upper mold and the lower mold of the molding die during molding. There is a tendency for dirt to occur. If resin contamination occurs during thermoforming, the resin contamination protrudes into the opening (concave portion) of the substrate, which is the optical semiconductor element mounting region, and becomes an obstacle when mounting the optical semiconductor element. Further, even if the optical semiconductor element can be mounted in the opening, the resin stain may cause a failure such as a connection failure when the optical semiconductor element and the metal wiring are electrically connected by a bonding wire or the like.
- the present invention has been made in view of the above circumstances, and is a thermosetting resin composition and an epoxy resin molding material that are sufficiently excellent in moldability by reducing the occurrence of resin stains during molding, and an optical semiconductor element using the same It is an object to provide a mounting substrate, a manufacturing method thereof, and an optical semiconductor device.
- Another object of the present invention is to provide a polyvalent carboxylic acid condensate that can give a cured product that is transparent and less colored when used as a curing agent for an epoxy resin.
- the present invention provides an epoxy resin molding material containing (A) an epoxy resin and (B) a curing agent, wherein (B) the curing agent contains a polyvalent carboxylic acid condensate.
- the present invention is also a thermosetting resin composition containing (A) an epoxy resin and (B) a curing agent, and (B) the viscosity of the curing agent measured by an ICI cone plate viscometer is 150 ° C.
- a thermosetting resin composition having a viscosity of 1.0 to 1000 mPa ⁇ s is provided.
- the present invention further relates to a thermosetting resin composition containing (A) an epoxy resin and (B) a curing agent, wherein (B) the curing agent has a component represented by the following general formula (1).
- a thermosetting resin composition containing a polyvalent carboxylic acid condensate is provided.
- R x represents a divalent organic group
- a plurality of R x in the same molecule may be the same or different
- R y represents a monovalent organic group, in the same molecule
- the two R y may be the same or different
- n 1 represents an integer of 1 or more.
- thermosetting resin composition of the present invention having the above-described configuration is sufficiently excellent in moldability by reducing the occurrence of resin stains during molding.
- R x is a divalent group which has an aliphatic hydrocarbon ring and the aliphatic hydrocarbon ring may be substituted with a halogen atom or a linear or branched hydrocarbon group
- R y Is preferably a monovalent hydrocarbon group which may be substituted with an acid anhydride group or a carboxylic acid ester group.
- the R x is preferably a divalent group represented by the following general formula (10).
- m represents an integer of 0 to 4
- R z represents a halogen atom or a linear or branched hydrocarbon group having 1 to 4 carbon atoms, and a plurality of m when m is 2 to 4.
- R z may be the same or different, and may be linked to each other to form a ring.
- R y is a monovalent group represented by the following chemical formula (20), or cyclobutane, cyclopentane, cyclohexane, cycloheptane, cyclooctane, norbornene, dicyclopentadiene, adamantane, hydrogenated naphthalene, and hydrogenated biphenyl. It is preferably a monovalent group derived by removing a hydrogen atom from a cycloaliphatic hydrocarbon selected from:
- the component represented by the general formula (1) preferably includes a component represented by the following general formula (1a).
- the number average molecular weight of the polyvalent carboxylic acid condensate is preferably 300 to 20,000.
- the viscosity of the polyvalent carboxylic acid condensate measured by an ICI cone plate viscometer is preferably 10 to 30000 mPa ⁇ s at 150 ° C.
- the curing agent may further contain an acid anhydride formed by ring-closing condensation of a polyvalent carboxylic acid in the molecule.
- curing agent can further contain the polyhydric carboxylic acid condensate represented by following Chemical formula (3).
- the blending amount of (B) curing agent is preferably 10 to 150 parts by mass with respect to 100 parts by mass of (A) epoxy resin.
- the equivalent ratio of (A) the epoxy group contained in the epoxy resin and the acid anhydride group in the (B) curing agent capable of reacting with the epoxy group is 1: 0.3 to 1: 1.2.
- thermosetting resin composition of the present invention further contains (D) a white pigment because the light reflectance in the visible light to near ultraviolet light region can be increased after curing.
- the white pigment preferably contains at least one inorganic substance selected from the group consisting of alumina, magnesium oxide, antimony oxide, titanium oxide, zirconium oxide and inorganic hollow particles.
- the center particle size of the (D) white pigment is 0.1 to 50 ⁇ m.
- thermosetting resin composition of the present invention is more excellent in moldability.
- the present invention also has a recess composed of a bottom surface and a wall surface, the bottom surface of the recess is an optical semiconductor element mounting portion, and at least a part of the wall surface of the recess is the thermosetting resin composition or epoxy resin molding of the present invention.
- an optical semiconductor element mounting substrate made of a cured material.
- the present invention further relates to a method for manufacturing a substrate for mounting an optical semiconductor element having a recess composed of a bottom surface and a wall surface, wherein at least part of the wall surface of the recess is molded with the thermosetting resin composition or epoxy resin molding of the present invention.
- a method for manufacturing a substrate for mounting an optical semiconductor element comprising a step of forming using a material.
- the present invention includes a substrate for mounting an optical semiconductor element having a recess composed of a bottom surface and a wall surface, an optical semiconductor element provided in the recess of the substrate for mounting an optical semiconductor element, and sealing the optical semiconductor element by filling the recess.
- an optical semiconductor device including a sealing resin portion to be stopped, and at least a part of the wall surface of the recess is made of a cured product of the thermosetting resin composition or the epoxy resin molding material of the present invention.
- this invention relates to the polyhydric carboxylic acid condensate containing the component represented with the following general formula (I).
- R x represents an aliphatic hydrocarbon ring and the aliphatic hydrocarbon ring represents a divalent group which may be substituted with a halogen atom or a linear or branched hydrocarbon group.
- the plurality of R x in the same molecule may be the same or different.
- R y represents a monovalent hydrocarbon group which may be substituted with an acid anhydride group or a carboxylic ester group, and two R y in the same molecule may be the same or different.
- n 1 represents an integer of 1 or more.
- the polyvalent carboxylic acid anhydride according to the present invention is used as a curing agent for an epoxy resin, it is possible to give a cured product that is transparent and less colored.
- R x represents a hydrogen atom from a cyclic aliphatic hydrocarbon selected from cyclobutane, cyclopentane, cyclohexane, cycloheptane, cyclooctane, norbornene, dicyclopentadiene, adamantane, hydrogenated naphthalene and hydrogenated biphenyl. It is preferably a divalent group derived by removing.
- the cycloaliphatic hydrocarbon may be substituted with a halogen atom or a linear or branched hydrocarbon group.
- R x is preferably a divalent group represented by Formula (10).
- R y is a monovalent group represented by the chemical formula (20), or cyclobutane, cyclopentane, cyclohexane, cycloheptane, cyclooctane, norbornene, dicyclopentadiene, adamantane, It is preferably a monovalent group derived by removing a hydrogen atom from a cyclic aliphatic hydrocarbon selected from hydrogenated naphthalene and hydrogenated biphenyl.
- the polyvalent carboxylic acid condensate according to the present invention may contain a component represented by the general formula (1a).
- the polyvalent carboxylic acid condensate may further contain a component represented by the following general formula (2).
- R x has the same meaning as R x in formula (I), including preferred embodiments thereof.
- n 2 represents an integer of 2 or more.
- Each of the polyvalent carboxylic acid condensates according to the present invention has a polycarboxylic acid represented by the following general formula (5) and a reaction liquid containing a monocarboxylic acid represented by the following general formula (6). It may be obtained by a method comprising a step of dehydrating and condensing a carboxyl group between molecules.
- R x and R y have the same meanings as R x and R y in formula (I), including preferred embodiments thereof.
- n 1 is preferably an integer of 1 to 200.
- the number average molecular weight Mn of the polyvalent carboxylic acid condensate according to the present invention is preferably 300 to 20,000.
- the viscosity of the polyvalent carboxylic acid condensate measured by an ICI cone plate viscometer is preferably 10 to 30000 mPa ⁇ s at 150 ° C.
- the method for producing the polyvalent carboxylic acid according to the present invention comprises: And a step of dehydrating and condensing the carboxyl group having between molecules.
- the reaction solution preferably further contains a compound selected from acetic anhydride, propionic anhydride, acetyl chloride, aliphatic acid chloride, and organic base.
- the epoxy resin curing agent according to the present invention contains the polyvalent carboxylic acid condensate according to the present invention.
- the epoxy resin curing agent according to the present invention can provide a cured product that is transparent and less colored.
- the epoxy resin curing agent according to the present invention may further contain, in addition to the polyvalent carboxylic acid condensate, an acid anhydride compound obtained by dehydration condensation of a carboxyl group in the molecule.
- the method for producing a curing agent for epoxy resins according to the present invention comprises melting the polyvalent carboxylic acid condensate according to the present invention and an acid anhydride compound obtained by dehydration condensation of the carboxyl group of the polyvalent carboxylic acid in the molecule. Mixing.
- the epoxy resin composition according to the present invention includes an epoxy resin having two or more epoxy groups and the epoxy resin curing agent according to the present invention.
- the epoxy resin composition according to the present invention can provide a transparent cured product with little coloring.
- the epoxy resin preferably contains a hydrogen atom from a cyclic aliphatic hydrocarbon selected from cyclobutane, cyclopentane, cyclohexane, cycloheptane, cyclooctane, norbornene, dicyclopentadiene, adamantane, hydrogenated naphthalene and hydrogenated biphenyl. It is a cycloaliphatic epoxy resin which has a saturated hydrocarbon group derived by removing, and in which the cyclic saturated hydrocarbon may be substituted with a halogen atom or a linear or branched hydrocarbon group.
- the cured product according to the present invention is obtained by thermally curing the above epoxy resin composition.
- Such a cured product preferably has transparency.
- the present invention also relates to a polyamide resin obtainable by polycondensation of the polyvalent carboxylic acid condensate according to the present invention and a polyamine having two or more amino groups.
- the polyamide resin according to the present invention is excellent in transparency as compared with a conventional polyamide resin.
- the use of an acid anhydride is rich in reactivity, and the reaction at a low temperature or in a short time becomes possible.
- the polyamide resin according to is excellent in productivity.
- the present invention also relates to a polyester resin that can be obtained by polycondensation of the polycarboxylic acid condensate according to the present invention and a polyalcohol having two or more hydroxyl groups.
- the polyester resin according to the present invention is excellent in transparency as compared with a conventional polyester resin.
- the use of acid anhydride is rich in reactivity, which enables reaction at low temperature and in a short time.
- the polyester resin according to the invention is also excellent in productivity.
- thermosetting resin composition an epoxy resin molding material, a substrate for mounting an optical semiconductor element using the same, and a method for producing the same, which reduce the occurrence of resin stains during molding and are sufficiently excellent in moldability, and An optical semiconductor device can be provided.
- the polyvalent carboxylic acid condensate according to the present invention When used as a curing agent for a thermosetting resin such as an epoxy resin, the cured product can be made transparent and less colored.
- the polyvalent carboxylic acid condensate according to the present invention provides a new choice of an acid anhydride curing agent that was not as rich in types as polyamines, phenol novolacs and imidazole curing agents.
- the melting temperature is generally 40 ° C.
- the application was limited to less than the lower limit.
- the epoxy resin curing agent according to the present invention is obtained from the viewpoint of fluidity, moldability, workability, storage stability, and freedom of compounding design, for example, when used as a transfer molding material. It is possible to easily achieve an appropriate melting point and viscosity.
- polyvalent carboxylic acid condensate having a low melting point.
- Most of aromatic or linear or cycloaliphatic tetracarboxylic anhydrides conventionally used for forming polyimide resins in combination with diamines have a melting point of 150 ° C. or higher, other than polyimide resin raw materials Application to was difficult. Since the polyvalent carboxylic acid according to the present invention can be applied to a wider range of uses, it is advantageous from the viewpoint of cost.
- FIG. 1 is a schematic cross-sectional view showing an embodiment of an optical semiconductor device of the present invention.
- 1 is a schematic cross-sectional view showing an embodiment of an optical semiconductor device of the present invention.
- 1 is a schematic cross-sectional view showing an embodiment of an optical semiconductor device of the present invention.
- 1 is a schematic cross-sectional view showing an embodiment of an optical semiconductor device of the present invention.
- 3 is an FT-IR spectrum of the polyvalent carboxylic acid condensate of Example A1. It is an ultraviolet-visible absorption spectrum of the polyvalent carboxylic acid condensate of Example A1.
- SYMBOLS 100 Optical semiconductor element, 101 ... Transparent sealing resin, 102 ... Bonding wire, 103 ... Hardened
- thermosetting resin composition is a thermosetting resin composition containing (A) an epoxy resin and (B) a curing agent, and is measured by an ICI cone plate viscometer. (B) The viscosity of the curing agent is 1.0 to 1000 mPa ⁇ s at 150 ° C.
- thermosetting resin composition which concerns on another embodiment of this invention contains (A) epoxy resin and (B) hardening
- curing agent is the said General formula (1).
- the polycarboxylic acid condensate which has a component represented by these is included.
- Epoxy resin As an epoxy resin, what is generally used with the epoxy resin molding material for electronic component sealing can be used.
- epoxy resins include epoxidized phenol and aldehyde novolak resins such as phenol novolac type epoxy resin and orthocresol novolak type epoxy resin, diglycidyl such as bisphenol A, bisphenol F, bisphenol S and alkyl-substituted bisphenol.
- Glycidylamine type epoxy resin obtained by reaction of polyamine such as ether, diaminodiphenylmethane and isocyanuric acid with epichlorohydrin, linear aliphatic epoxy resin obtained by oxidizing olefin bond with peracid such as peracetic acid, and alicyclic An epoxy resin is mentioned. These can be used alone or in combination of two or more.
- bisphenol A type epoxy resin bisphenol F type epoxy resin, bisphenol S type epoxy resin, diglycidyl isocyanurate, triglycidyl isocyanurate, and 1,2-cyclohexanedicarboxylic acid, 1,3-cyclohexanedicarboxylic acid or A dicarboxylic acid diglycidyl ester derived from 1,4-cyclohexanedicarboxylic acid is preferred because of relatively little coloring.
- diglycidyl esters of dicarboxylic acids such as phthalic acid, tetrahydrophthalic acid, hexahydrophthalic acid, methyltetrahydrophthalic acid, nadic acid and methylnadic acid are also suitable.
- examples thereof include glycidyl esters such as nuclear hydrogenated trimellitic acid and nuclear hydrogenated pyromellitic acid having an alicyclic structure in which an aromatic ring is hydrogenated.
- Polyorganosiloxane having an epoxy group produced by heating and hydrolyzing and condensing a silane compound in the presence of an organic solvent, an organic base and water is also included.
- an epoxy resin represented by the following formula (7) which is a copolymer of a glycidyl (meth) acrylate monomer and a polymerizable monomer, can also be used.
- R 1 represents a glycidyl group
- R 2 and R 3 each independently represent a hydrogen atom or a saturated or unsaturated monovalent hydrocarbon group having 1 to 6 carbon atoms
- R 4 represents 1 Represents a saturated saturated hydrocarbon group.
- a and b represent a positive integer.
- the epoxy resin is a cycloaliphatic selected from cyclobutane, cyclopentane, cyclohexane, cycloheptane, cyclooctane, norbornene, dicyclopentadiene, adamantane, hydrogenated naphthalene, and hydrogenated biphenyl.
- An alicyclic epoxy resin having an aliphatic hydrocarbon group derived by removing a hydrogen atom from a hydrocarbon is also preferred.
- the cycloaliphatic hydrocarbon may be substituted with a halogen atom or a linear or branched hydrocarbon group.
- the curing agent according to the present embodiment only needs to contain a polyvalent carboxylic acid condensate, and the viscosity of the (B) curing agent measured by an ICI cone plate viscometer is 1.0 to 1000 mPa at 150 ° C. S is preferable, and 10 to 200 mPa ⁇ s is more preferable.
- the viscosity of the curing agent is within the specific range, for example, when a thermosetting resin composition containing a polyvalent carboxylic acid condensate is used for transfer molding, the occurrence of burrs is suppressed. Good moldability can be obtained.
- a method of adjusting the viscosity of the curing agent a method of adjusting the viscosity of the polyvalent carboxylic acid condensate by controlling the average molecular weight of the polyvalent carboxylic acid condensate, or a combination with the polyvalent carboxylic acid condensate can be used.
- the method of adjusting the compounding ratio with a hardener is mentioned.
- the viscosity of the polyvalent carboxylic acid condensate desirable for adjusting the viscosity of the curing agent is preferably 10 to 30000 mPa ⁇ s at 150 ° C., more preferably 10 to 10000 mPa ⁇ s.
- the viscosity of the polyvalent carboxylic acid condensate in the above temperature range is less than 10 mPa ⁇ s, the effect of suppressing the occurrence of resin stains during transfer molding tends to be low, and when it exceeds 30000 mPa ⁇ s, the mold during transfer molding The fluidity of the thermosetting resin composition tends to decrease.
- the viscosity of the polyvalent carboxylic acid condensate is, for example, Research Equipment (London) LTD. It can be measured using a manufactured ICI cone plate viscometer.
- polyvalent carboxylic acid condensate means a polymer formed by condensation of one or more polycarboxylic acids having two or more carboxyl groups between molecules. More specifically, the polyvalent carboxylic acid condensate has an acid anhydride group (an acid anhydride bond) formed by dehydration condensation between carboxy groups of two or more monomers having two or more carboxy groups. ) And each monomer unit is linked in a chain or cyclic manner by the generated acid anhydride group.
- an acid anhydride compound that can be obtained by dehydrating and condensing a carboxyl group of a polyvalent carboxylic acid in a molecule means that a carboxyl group of a polyvalent carboxylic acid having two or more carboxyl groups is dehydrated and condensed in the molecule. It means an acid anhydride compound in which an acid anhydride group is generated and a cyclic structure including the generated acid anhydride group is formed.
- the polyvalent carboxylic acid condensate according to the present embodiment is usually composed of a plurality of components having different degrees of polymerization, and may include a plurality of components having different constitutions of repeating units and terminal groups.
- the polyvalent carboxylic acid condensate according to the present embodiment preferably includes a component represented by the following general formula (1) as a main component.
- R x represents a divalent organic group
- R y represents a monovalent organic group.
- the proportion of the component of formula (1) is 60% by mass or more based on the total amount of the polyvalent carboxylic acid condensate.
- R x in formula (1) is preferably a divalent saturated hydrocarbon group having a saturated hydrocarbon ring.
- R x is a saturated hydrocarbon group having a saturated hydrocarbon ring
- the polyvalent carboxylic acid condensate can form a transparent cured product of an epoxy resin.
- a plurality of R x in the same molecule may be the same or different.
- the saturated hydrocarbon ring of R x may be substituted with a halogen atom or a linear or branched hydrocarbon group.
- the hydrocarbon group that substitutes the saturated hydrocarbon ring is preferably a saturated hydrocarbon group.
- the saturated hydrocarbon ring may be a single ring or a condensed ring, a polycyclo ring, a spiro ring or a ring assembly composed of two or more rings.
- R x preferably has 3 to 15 carbon atoms.
- R x is a group derived by removing a carboxyl group from a polyvalent carboxylic acid as a monomer used to obtain the component (polymer) represented by the general formula (1).
- the polyvalent carboxylic acid as a monomer preferably has a boiling point higher than the reaction temperature of polycondensation.
- R x is a hydrogen atom from a cyclic aliphatic hydrocarbon selected from cyclobutane, cyclopentane, cyclohexane, cycloheptane, cyclooctane, norbornene, dicyclopentadiene, adamantane, hydrogenated naphthalene and hydrogenated biphenyl. It is preferably a divalent group derived by removing. When R x is these groups, the effect of obtaining a cured product that is transparent and less colored by heat is more remarkably exhibited.
- These cyclic saturated hydrocarbons may be substituted with a halogen atom or a linear or branched hydrocarbon group (preferably a saturated hydrocarbon group).
- R x is preferably a group derived by removing a carboxyl group from 1,2-cyclohexanedicarboxylic acid, 1,3-cyclohexanedicarboxylic acid, 1,4-cyclohexanedicarboxylic acid or derivatives thereof. That is, R x is preferably a divalent group represented by the following general formula (10).
- m represents an integer of 0 to 4.
- R z represents a halogen atom or a linear or branched hydrocarbon group having 1 to 4 carbon atoms. When m is 2 to 4, a plurality of R z may be the same or different and may be connected to each other to form a ring.
- R y as a terminal group in the formula (1) represents a monovalent hydrocarbon group which may be substituted with an acid anhydride group or a carboxylic acid ester group.
- Two R y may be the same or different.
- R y may be a monovalent group derived by removing a carboxyl group from a linear, branched or cyclic aliphatic or aromatic monocarboxylic acid having 2 to 15 carbon atoms (such as benzoic acid). Good.
- R y is preferably a monovalent group represented by the following chemical formula (20), or cyclobutane, cyclopentane, cyclohexane, cycloheptane, cyclooctane, norbornene, dicyclopentadiene, adamantane, hydrogenated naphthalene and hydrogen It is a monovalent group derived by removing a hydrogen atom from a cycloaliphatic hydrocarbon selected from conjugated biphenyl.
- Ry being these groups, the effect of obtaining a cured product with less coloring due to heat is more remarkably exhibited. Further, when R y is such a group, the concentration of the carboxylic acid residue in the polyvalent carboxylic acid condensate can be reduced, and dispersion of the molecular weight can be suppressed.
- R x may be a divalent group represented by the general formula (10), and at the same time, R y may be a monovalent group represented by the chemical formula (20). That is, the polyvalent carboxylic acid condensate according to the present embodiment may include a component represented by the following general formula (1a) as the component represented by the general formula (1).
- N 1 in the formulas (1) and (1a) represents an integer of 1 or more, preferably an integer of 1 to 200.
- the number average molecular weight Mn of the polyvalent carboxylic acid condensate is preferably 200 to 20000, more preferably 300 to 20000, and still more preferably 300 to 10,000. If Mn is less than 200, the viscosity tends to be too low to make it difficult to suppress the occurrence of resin stains during transfer molding of the thermosetting resin composition, and if it exceeds 20000, the compatibility with the epoxy resin decreases. There is a tendency that the fluidity at the time of transfer molding of the thermosetting resin composition tends to decrease.
- the number average molecular weight Mn used in the present invention can be obtained by measuring under the following conditions using a standard polystyrene calibration curve by gel permeation chromatography (GPC).
- GPC conditions Pump: L-6200 type (manufactured by Hitachi, Ltd., trade name) Column: TSKgel-G5000HXL and TSKgel-G2000HXL (trade name, manufactured by Tosoh Corporation) Detector: L-3300RI type (manufactured by Hitachi, Ltd., trade name)
- Eluent Tetrahydrofuran Measurement temperature: 30 ° C Flow rate: 1.0 mL / min
- the polyvalent carboxylic acid condensate according to the present embodiment can be obtained by dehydration condensation in a reaction solution containing a polyvalent carboxylic acid and a monocarboxylic acid used as necessary.
- a reaction solution containing a polyvalent carboxylic acid represented by the following general formula (5) and a monocarboxylic acid represented by the following general formula (6) the respective carboxyl groups possessed by dehydration condensation between molecules can be obtained by a method comprising:
- the dehydrating condensation reaction liquid is, for example, a polyhydric carboxylic acid and a monocarboxylic acid, and a dehydrating agent selected from acetic anhydride or propionic anhydride, acetyl chloride, an aliphatic acid chloride, and an organic base (such as trimethylamine) that dissolve them.
- a dehydrating agent selected from acetic anhydride or propionic anhydride, acetyl chloride, an aliphatic acid chloride, and an organic base (such as trimethylamine) that dissolve them.
- Containing For example, after the reaction solution is refluxed in a nitrogen atmosphere for 5 to 60 minutes, the temperature of the reaction solution is increased to 180 ° C., and the generated acetic acid and water are distilled off in an open system under a nitrogen stream. To advance. When generation of volatile components is no longer observed, polycondensation proceeds in a molten state at a temperature of 180 ° C.
- the produced polyvalent carboxylic acid condensate may be purified by recrystallization or reprecipitation using an aprotic solvent such as acetic anhydride.
- the reaction conditions can be appropriately changed so as to obtain the desired ICI corn plate viscosity, number average molecular weight, and softening point, and the reaction conditions are not limited to those shown here.
- the polycarboxylic acid condensate obtained by such a method is a condensate of two molecules of monocarboxylic acid of formula (6), condensation of polycarboxylic acid of formula (5) and monocarboxylic acid of formula (6) , Unreacted products of polycarboxylic acids and monocarboxylic acids, and acid anhydrides formed by condensation reaction of reaction reagents such as acetic anhydride and propionic anhydride with polycarboxylic acids or monocarboxylic acids May contain by-products. These by-products may be removed by purification, or may be used as a curing agent in a mixture.
- the polyvalent carboxylic acid condensate used in the present invention is prepared by adjusting the ICI corn plate viscosity, number average molecular weight and softening point of the product according to the charged composition ratio of the polyvalent carboxylic acid and the monocarboxylic acid before the condensation reaction. can do. As the ratio of polyvalent carboxylic acid increases, the ICI cone plate viscosity, number average molecular weight, and softening point tend to increase. However, depending on the conditions of the condensation reaction, the above-mentioned tendency is not necessarily exhibited, and it is necessary to take into account the reaction temperature, the degree of pressure reduction, and the reaction time, which are the conditions for the dehydration condensation reaction.
- the softening point of the polyvalent carboxylic acid condensate is preferably 20 to 200 ° C, more preferably 20 to 130 ° C, still more preferably 30 to 90 ° C.
- the softening point of the polyvalent carboxylic acid condensate is preferably 30 to 80 ° C., and preferably 30 to 50 ° C. Is more preferable.
- the softening point is less than 20 ° C., the handling property, kneading property and dispersibility are lowered during the production of the thermosetting resin composition, and it is difficult to effectively suppress the occurrence of resin stains during transfer molding.
- the softening point exceeds 200 ° C., the curing agent may remain undissolved in the resin composition when heated to 100 to 200 ° C. by transfer molding, and it tends to be difficult to obtain a uniform molded product.
- the softening point of the polyvalent carboxylic acid condensate can be set to a desired range by selecting the structure of the main chain and adjusting the number average molecular weight. Generally, the softening point can be lowered by using the divalent carboxylic acid investigated as a monomer, and the softening point can be increased by introducing a highly polar structure. In general, the softening point can be lowered by increasing the number average molecular weight.
- the content of the polyvalent carboxylic acid condensate is preferably 10 to 100% by mass, and preferably 20 to 70% by mass, based on the entire (B) curing agent. More preferably, the content is 20 to 50% by mass.
- the curing agent may further contain an acid anhydride formed by ring-closing condensation of a polyvalent carboxylic acid in the molecule.
- the equivalent ratio of (A) the epoxy group contained in the epoxy resin to the polyanhydride group in the (B) curing agent capable of reacting with the epoxy group is 1: 0.3 to 1: 1. 2 is preferable.
- a curing agent generally used in an epoxy resin molding material for electronic component sealing may be used in combination with the polyvalent carboxylic acid condensate as the curing agent. It can.
- a curing agent is not particularly limited as long as it reacts with the epoxy resin, but is preferably colorless or light yellow. Examples of such a curing agent include an acid anhydride curing agent, an isocyanuric acid derivative curing agent, and a phenol curing agent.
- Examples of the acid anhydride curing agent include phthalic anhydride, maleic anhydride, trimellitic anhydride, pyromellitic anhydride, hexahydrophthalic anhydride, tetrahydrophthalic anhydride, methyl nadic anhydride, nadic anhydride, glutaric anhydride.
- Examples include acid, dimethyl glutaric anhydride, diethyl glutaric anhydride, succinic anhydride, methyl hexahydrophthalic anhydride, and methyl tetrahydrophthalic anhydride.
- Isocyanuric acid derivatives include 1,3,5-tris (1-carboxymethyl) isocyanurate, 1,3,5-tris (2-carboxyethyl) isocyanurate, 1,3,5-tris (3-carboxypropyl) ) Isocyanurate, 1,3-bis (2-carboxyethyl) isocyanurate.
- phthalic anhydride trimellitic anhydride, hexahydrophthalic anhydride, tetrahydrophthalic anhydride, methylhexahydrophthalic anhydride, methyltetrahydrophthalic anhydride, glutaric anhydride, dimethylglutaric anhydride, anhydrous Diethyl glutaric acid or 1,3,5-tris (3-carboxypropyl) isocyanurate is preferably used.
- curing agent may be used individually by 1 type or in combination of 2 or more types. When these curing agents that can be used in combination are included, the viscosity of the (B) curing agent as a whole can be adjusted by changing the blending ratio with the polyvalent carboxylic acid condensate, which is preferable.
- the above-mentioned curing agent that can be used in combination preferably has a molecular weight of 100 to 400.
- an anhydride obtained by hydrogenating all unsaturated bonds of an aromatic ring is preferable to an acid anhydride having an aromatic ring such as trimellitic anhydride or pyromellitic anhydride.
- an acid anhydride curing agent an acid anhydride generally used as a raw material for the polyimide resin may be used.
- the blending amount of the (B) curing agent is preferably 1 to 150 parts by mass with respect to 100 parts by mass of the (A) epoxy resin, which suppresses resin stains. From the viewpoint, it is more preferably 50 to 120 parts by mass.
- the curing agent has an active group (an acid anhydride group or a hydroxyl group) in (B) the curing agent capable of reacting with the epoxy group with respect to 1 equivalent of the epoxy group in (A) the epoxy resin.
- the blending is preferably 0.5 to 0.9 equivalent, and more preferably 0.7 to 0.8 equivalent. If the said active group is less than 0.5 equivalent, while the cure rate of a thermosetting resin composition will become slow, the glass transition temperature of the hardened
- the thermosetting resin composition of the present invention can contain (C) a curing accelerator.
- C) a hardening accelerator if it has a catalyst function which accelerates
- the curing accelerator include amine compounds, imidazole compounds, organic phosphorus compounds, alkali metal compounds, alkaline earth metal compounds, and quaternary ammonium salts.
- Examples of the amine compound include 1,8-diaza-bicyclo (5,4,0) undecene-7, triethylenediamine, and tri-2,4,6-dimethylaminomethylphenol.
- Examples of the imidazole compound include 2-ethyl-4-methylimidazole.
- examples of the organic phosphorus compound include triphenylphosphine, tetraphenylphosphonium tetraphenylborate, tetra-n-butylphosphonium-o, o-diethylphosphorodithioate, tetra-n-butylphosphonium-tetrafluoroborate, tetra -N-butylphosphonium-tetraphenylborate. These curing accelerators may be used alone or in combination of two or more.
- the blending amount of the (C) curing accelerator is preferably 0.01 to 8 parts by mass, more preferably 0.1 to 3 parts by mass with respect to 100 parts by mass of the (A) epoxy resin. . If the content of the curing accelerator is less than 0.01 parts by mass, a sufficient curing acceleration effect may not be obtained, and if it exceeds 8 parts by mass, discoloration may be seen in the resulting molded article.
- the thermosetting resin composition of the present invention further contains (D) a white pigment.
- a white pigment a well-known thing can be used and it does not specifically limit.
- the white pigment include alumina, magnesium oxide, antimony oxide, titanium oxide, zirconium oxide, and inorganic hollow particles. These can be used alone or in combination of two or more.
- the inorganic hollow particles include sodium silicate glass, aluminum silicate glass, borosilicate soda glass, and shirasu (white sand).
- the white pigment preferably has a central particle size of 0.1 to 50 ⁇ m. If the central particle size is less than 0.1 ⁇ m, the particles tend to aggregate and the dispersibility tends to decrease. When it exceeds, the reflective property of the hardened
- the blending amount of the white pigment is not particularly limited, but is preferably 10 to 85% by volume, more preferably 20 to 75% by volume with respect to the entire thermosetting resin composition. If the blending amount is less than 10% by volume, the light-reflecting properties of the cured thermosetting resin composition tend not to be sufficiently obtained, and if it exceeds 85% by volume, the moldability of the thermosetting resin composition tends to be low. There is a tendency to decrease.
- thermosetting resin composition contains the inorganic filler mentioned later with (D) white pigment
- the total compounding quantity of (D) white pigment and an inorganic filler is with respect to the whole thermosetting resin composition.
- the content is 10 to 85% by volume, the moldability of the thermosetting resin composition can be further improved.
- thermosetting resin composition preferably contains an inorganic filler in order to adjust moldability.
- inorganic fillers include silica, antimony oxide, titanium oxide, aluminum hydroxide, magnesium hydroxide, barium sulfate, magnesium carbonate, barium carbonate, alumina, mica, beryllia, barium titanate, potassium titanate, strontium titanate, Examples include calcium titanate, aluminum carbonate, aluminum silicate, calcium carbonate, calcium silicate, magnesium silicate, silicon nitride, boron nitride, clay such as calcined clay, talc, aluminum borate, aluminum borate, and silicon carbide.
- the inorganic filler is selected from the group consisting of silica, alumina, magnesium oxide, antimony oxide, titanium oxide, zirconium oxide, aluminum hydroxide, and magnesium hydroxide. A mixture of two or more selected is preferable.
- the average particle size of the inorganic filler is preferably 1 to 100 ⁇ m and more preferably 1 to 40 ⁇ m from the viewpoint of improving packing properties with the white pigment.
- the blending amount of the inorganic filler in the thermosetting resin composition of the present embodiment is preferably 1 to 1000 parts by mass with respect to 100 parts by mass of the total amount of the component (A) and the component (B). More preferably, it is ⁇ 800 parts by mass.
- the thermosetting resin composition has a viewpoint of improving the adhesion between the components (A) to (C), which are thermosetting resin components, and (D) the white pigment and the inorganic filler added as necessary. It is preferable to add a coupling agent. Although it does not specifically limit as a coupling agent, For example, a silane coupling agent and a titanate coupling agent are mentioned. Examples of the silane coupling agent generally include epoxy silane, amino silane, cationic silane, vinyl silane, acryl silane, mercapto silane, and composites thereof, and can be used in any amount. In addition, it is preferable that the compounding quantity of a coupling agent is 5 mass% or less with respect to the whole thermosetting resin composition.
- additives such as antioxidant, a mold release agent, and an ion capture agent, to the tree thermosetting fat composition of this embodiment as needed.
- thermosetting resin composition of the present embodiment can be obtained by uniformly dispersing and mixing the various components described above, and the means and conditions thereof are not particularly limited.
- a general method for producing a thermosetting resin composition there can be mentioned a method in which each component is kneaded with an extruder, a kneader, a roll, an extruder, etc., and then the kneaded product is cooled and pulverized.
- kneading each component it is preferable to carry out in a molten state from the viewpoint of improving dispersibility.
- the kneading conditions may be appropriately determined depending on the type and blending amount of each component.
- kneading is preferably performed at 15 to 100 ° C. for 5 to 40 minutes, more preferably at 20 to 100 ° C. for 10 to 30 minutes. preferable.
- the kneading temperature is less than 15 ° C., it becomes difficult to knead each component and the dispersibility also tends to decrease.
- the kneading temperature exceeds 100 ° C., the resin composition increases in molecular weight, and the resin composition is cured. There is a possibility that. If the kneading time is less than 5 minutes, resin burrs may be generated during transfer molding. If the kneading time exceeds 40 minutes, the resin composition may be increased in molecular weight and the resin composition may be cured.
- thermosetting resin composition of the present invention is produced by passing through a premixing step in which (A) an epoxy resin and (B) a curing agent are mixed in advance, and then adding other components and kneading with a roll mill or an extruder.
- a premixing step in which (A) an epoxy resin and (B) a curing agent are mixed in advance, and then adding other components and kneading with a roll mill or an extruder.
- at least one of (A) epoxy resin and (B) curing agent is liquid at 0 to 35 ° C. or has a low viscosity of less than 10 mPa ⁇ s at 100 to 200 ° C.
- premixing It is preferable to perform a process.
- the thermosetting resin composition obtained by premixing using such (A) epoxy resin and (B) curing agent has improved storage stability and is more excellent in moldability during transfer molding. Become.
- the viscosity of the premix in the premixing step is preferably 10 to 10,000 mPa ⁇ s at 100 to 150 ° C., and more preferably 10 to 10,000 mPa ⁇ s at 100 ° C. If the viscosity is less than 10 mPa ⁇ s, burrs are likely to occur during transfer molding, and if it exceeds 10,000 mPa ⁇ s, the fluidity during molding decreases, making it difficult to pour the thermosetting resin composition into the mold, and the moldability is reduced. There is a tendency to decrease.
- the epoxy resin and (B) the curing reaction product of the curing agent, etc. are deposited into a pre-mixed mixture of precipitates. It is preferable to adjust the mixing conditions so that white turbidity does not occur. “White turbidity due to precipitates” indicates that there is scattering of electromagnetic waves in the visible light region. More specifically, it indicates that there is no fine particle having a scattering center that causes Rayleigh scattering, Mie scattering, and diffraction scattering phenomenon of light.
- the preliminary mixing step 100 parts by mass of (A) epoxy and 120 parts by mass of (B) curing agent are weighed in a heat-resistant glass container, and the mixing container is made of a fluid such as silicone oil or water as a medium.
- a method of heating at 35 to 180 ° C. using a heated heater can be used.
- the heating method is not limited to the above method, and a thermocouple, electromagnetic wave irradiation, or the like can be used, and ultrasonic waves may be irradiated to promote dissolution.
- thermosetting resin composition containing 120 parts by mass of (B) curing agent with respect to 100 parts by mass of (A) epoxy resin
- 50 parts by mass of (A) epoxy resin and (B) 120 parts by mass of the curing agent is weighed in a container made of heat-resistant glass, and this mixing container is heated at 35 to 180 ° C. using a heater using a fluid such as silicone oil or water to obtain a preliminary mixture.
- the obtained preliminary mixture the remaining (A) 50 parts by mass of the epoxy resin, (C) the curing accelerator and other components may be mixed by roll kneading to produce a thermosetting resin composition. .
- thermosetting resin composition of this embodiment can be pressure-molded to produce a tablet near room temperature (15 to 30 ° C.), and has a light reflectance of 80% or more at a wavelength of 350 to 800 nm after thermosetting. It is preferable that The pressure molding can be performed, for example, at room temperature under conditions of 5 to 50 MPa and 1 to 5 seconds. If the light reflectance is less than 80%, there is a tendency that it cannot sufficiently contribute to the improvement of the luminance of the optical semiconductor device, and a more preferable light reflectance is 90% or more.
- the thermosetting resin composition of the present invention may have a burr length of 5 mm or less when transfer molded under conditions of a molding temperature of 100 ° C. to 200 ° C., a molding pressure of 5 to 20 MPa, and a molding time of 60 to 180 seconds. preferable. If the length of the burr exceeds 5 mm, when manufacturing the optical semiconductor element mounting substrate, resin contamination occurs in the opening (recessed portion) that becomes the optical semiconductor element mounting region, and this is an obstacle to mounting the optical semiconductor element. In addition, there is a possibility that it becomes an obstacle when electrically connecting the optical semiconductor element and the metal wiring. From the viewpoint of workability at the time of manufacturing a semiconductor device, the burr length is more preferably 3 mm or less, and further preferably 1 mm or less.
- thermosetting resin composition of the present embodiment is used in various applications such as electrical insulating materials, optical semiconductor sealing materials, adhesive materials, paint materials, and epoxy resin molding materials for transfer molding that require high transparency and heat resistance. Useful.
- the epoxy resin molding material of the present invention is an epoxy resin molding material containing the above (A) epoxy resin and the above (B) curing agent, and (B) the curing agent contains the polyvalent carboxylic acid condensate described above. .
- the substrate for mounting a semiconductor element of the present invention has a recess composed of a bottom surface and a wall surface. It consists of a cured product.
- FIG. 1 is a perspective view showing an embodiment of a substrate for mounting an optical semiconductor element of the present invention.
- the substrate for mounting an optical semiconductor element 110 includes a metal wiring 105 on which Ni / Ag plating 104 is formed and a reflector 103, and a recess formed from the metal wiring 105 on which Ni / Ag plating 104 is formed and the reflector 103. 200.
- the bottom surface of the recess 200 is composed of the metal wiring 105 on which the Ni / Ag plating 104 is formed, and the wall surface of the recess is composed of the reflector 103.
- the reflector 103 is composed of the thermosetting resin composition of the present invention. It is a molded article made of a cured product.
- FIG. 2 is a schematic view showing an embodiment of a process for producing an optical semiconductor element mounting substrate of the present invention.
- the optical semiconductor element mounting substrate is formed by, for example, forming a metal wiring 105 from a metal foil by a known method such as punching or etching, and applying Ni / Ag plating 104 by electroplating (FIG. 2A), A step of placing the metal wiring 105 in a mold 151 having a predetermined shape, injecting the thermosetting resin composition of the present invention from the resin injection port 150 of the mold 151, and performing transfer molding under a predetermined condition (FIG.
- the optical semiconductor element mounting region (recessed portion) 200 is formed on the optical semiconductor element mounting substrate.
- the optical semiconductor element mounting region (concave portion) 200 is surrounded by the reflector 103 made of a cured product of the thermosetting resin composition.
- the transfer molding is preferably performed at a mold temperature of 170 to 200 ° C., a molding pressure of 0.5 to 20 MPa for 60 to 120 seconds, and an after cure temperature of 120 to 180 ° C. for 1 to 3 hours.
- An optical semiconductor device of the present invention includes the optical semiconductor element mounting substrate, an optical semiconductor element provided in a recess of the optical semiconductor element mounting substrate, and a sealing resin that fills the recess and seals the optical semiconductor element. Part.
- FIG. 3 is a perspective view showing an embodiment in which the optical semiconductor element 100 is mounted on the optical semiconductor element mounting substrate 110 of the present invention.
- the optical semiconductor element 100 is mounted at a predetermined position in the optical semiconductor element mounting region (concave portion) 200 of the optical semiconductor element mounting substrate 110 and is electrically connected by the metal wiring 105 and the bonding wire 102.
- the 4 and 5 are schematic cross-sectional views showing an embodiment of the optical semiconductor device of the present invention.
- the optical semiconductor device includes an optical semiconductor element mounting substrate 110, an optical semiconductor element 100 provided at a predetermined position in the concave portion 200 of the optical semiconductor element mounting substrate 110, and the concave portion 200.
- a sealing resin portion made of a transparent sealing resin 101 including a phosphor 106 that fills and seals the optical semiconductor element, and the optical semiconductor element 100 and the metal wiring 105 on which the Ni / Ag plating 104 is formed; Are electrically connected by bonding wires 102 or solder bumps 107.
- FIG. 6 is also a schematic cross-sectional view showing an embodiment of the optical semiconductor device of the present invention.
- the LED element 300 is disposed via a die bonding material 306 at a predetermined position on the lead 304 on which the reflector 303 is formed, and the LED element 300 and the lead 304 are electrically connected by the bonding wire 301.
- the LED body element 300 is sealed with a transparent sealing resin 302 that is connected and includes a phosphor 305.
- the polyvalent carboxylic acid condensate of the present invention is usually composed of a plurality of components having different degrees of polymerization, and may contain a plurality of components having different constitutions of repeating units and terminal groups.
- the polyvalent carboxylic acid condensate according to the present embodiment contains a component represented by the following general formula (I) as a main component.
- the proportion of the component of formula (I) is 10% by mass or more based on the total amount of the polyvalent carboxylic acid condensate.
- R x in the formula (I) is a divalent saturated hydrocarbon group having a saturated hydrocarbon ring.
- R x is a saturated hydrocarbon group having a saturated hydrocarbon ring
- the polyvalent carboxylic acid condensate can form a transparent cured product of an epoxy resin.
- a plurality of R x in the same molecule may be the same or different.
- the saturated hydrocarbon ring of R x may be substituted with a halogen atom or a linear or branched hydrocarbon group.
- the hydrocarbon group that substitutes the saturated hydrocarbon ring is preferably a saturated hydrocarbon group.
- the saturated hydrocarbon ring may be a single ring or a condensed ring, a polycyclo ring, a spiro ring or a ring assembly composed of two or more rings.
- R x preferably has 3 to 15 carbon atoms.
- R x is a group derived by removing a carboxyl group from a polyvalent carboxylic acid as a monomer used to obtain the polymer of formula (I).
- the polyvalent carboxylic acid as a monomer preferably has a boiling point higher than the reaction temperature of polycondensation.
- R x is a hydrogen atom from a cyclic aliphatic hydrocarbon selected from cyclobutane, cyclopentane, cyclohexane, cycloheptane, cyclooctane, norbornene, dicyclopentadiene, adamantane, hydrogenated naphthalene and hydrogenated biphenyl. It is preferably a divalent group derived by removing. When R x is these groups, the effect of obtaining a cured product that is transparent and less colored by heat is more remarkably exhibited.
- These cyclic saturated hydrocarbons may be substituted with a halogen atom or a linear or branched hydrocarbon group (preferably a saturated hydrocarbon group).
- R x is preferably a group derived by removing a carboxyl group from 1,2-cyclohexanedicarboxylic acid, 1,3-cyclohexanedicarboxylic acid, 1,4-cyclohexanedicarboxylic acid or derivatives thereof. That is, R x is preferably a divalent group represented by the general formula (10).
- R y which is a terminal group in the formula (I) represents a monovalent hydrocarbon group which may be substituted with an acid anhydride group or a carboxylic acid ester group.
- Two R y may be the same or different.
- R y may be a monovalent group derived by removing a carboxyl group from a linear, branched or cyclic aliphatic or aromatic monocarboxylic acid having 2 to 15 carbon atoms (such as benzoic acid). Good.
- R y is preferably a monovalent group represented by the chemical formula (20), or cyclobutane, cyclopentane, cyclohexane, cycloheptane, cyclooctane, norbornene, dicyclopentadiene, adamantane, hydrogenated naphthalene and hydrogen. It is a monovalent group derived by removing a hydrogen atom from a cycloaliphatic hydrocarbon selected from conjugated biphenyl. When Ry is these groups, the effect of obtaining a cured product that is transparent and less colored by heat is more remarkably exhibited.
- R x may be a divalent group represented by the general formula (10), and at the same time, R y may be a monovalent group represented by the chemical formula (20). That is, the polyvalent carboxylic acid condensate according to the present embodiment may include a component represented by the general formula (1a) as a component of the formula (I).
- n 1 represents an integer of 1 or more, preferably an integer of 1 to 200.
- the polyvalent carboxylic acid condensate may further contain a component represented by the following general formula (2).
- the component of the formula (2) may be generated as a by-product when polycondensation of polyvalent carboxylic acid.
- Formula (2) represents that a carbonyl carbon and an oxygen atom in the repeating unit are directly bonded to form a cyclic structure.
- the number average molecular weight Mn of the polycarboxylic acid condensate is preferably 300 to 20000.
- the number average molecular weight Mn is smaller than 300, the viscosity tends to be too low, and when it is larger than 2000, the compatibility with the epoxy resin or the like tends to be lowered.
- the viscosity of the polyvalent carboxylic acid condensate measured by an ICI cone plate viscometer is preferably 10 to 30000 mPa ⁇ s in the range of 100 to 150 ° C.
- the viscosity of the polyvalent carboxylic acid condensate is, for example, Research Equipment (London) LTD. It can be measured using a manufactured ICI cone plate viscometer.
- the softening point of the polyvalent carboxylic acid condensate is preferably 20 to 200 ° C, more preferably 30 to 130 ° C, still more preferably 30 to 90 ° C.
- the polyvalent carboxylic acid condensate of the present invention is, for example, a reaction liquid containing a polycarboxylic acid represented by the general formula (5) and a monocarboxylic acid represented by the general formula (6). It can be obtained by a method comprising a step of dehydrating and condensing a carboxyl group having intermolecular dehydration.
- the dehydrating condensation reaction liquid is, for example, a polyhydric carboxylic acid and a monocarboxylic acid, and a dehydrating agent selected from acetic anhydride or propionic anhydride, acetyl chloride, an aliphatic acid chloride, and an organic base (such as trimethylamine) that dissolve them.
- a dehydrating agent selected from acetic anhydride or propionic anhydride, acetyl chloride, an aliphatic acid chloride, and an organic base (such as trimethylamine) that dissolve them.
- Containing For example, after the reaction solution is refluxed in a nitrogen atmosphere for 5 to 30 minutes, the temperature of the reaction solution is increased to 180 ° C., and the generated acetic acid and water are distilled off in an open system under a nitrogen stream. To advance. When generation of volatile components is no longer observed, polycondensation proceeds in a molten state at a temperature of 180 ° C. for 3 hours, more preferably for 1 hour
- the polycarboxylic acid condensate obtained by such a method is a condensate of two molecules of monocarboxylic acid of formula (6), a condensate of polycarboxylic acid of formula (5) and monocarboxylic acid of formula (6), Unreacted products of polyvalent carboxylic acid and monocarboxylic acid, and by-products such as acid anhydrides formed by condensation reaction of a reaction reagent such as acetic anhydride and propionic anhydride with polyvalent carboxylic acid or monocarboxylic acid May contain objects.
- the curing agent for epoxy resin includes an acid anhydride containing a polyvalent carboxylic acid condensate and an acid anhydride compound that can be obtained by dehydrating condensation of a carboxyl group of the polyvalent carboxylic acid in the molecule.
- System curing agent As the acid anhydride compound to be combined with the polyvalent carboxylic acid condensate, those generally used in an epoxy resin molding material for electronic component sealing, an epoxy resin molding material for optical semiconductor sealing, and the like can be used.
- the acid anhydride compound can be used without particular limitation as long as it reacts with the epoxy resin, but is preferably colorless or pale yellow.
- the molecular weight of the acid anhydride compound is preferably 100 to 400.
- An anhydride obtained by hydrogenating all unsaturated bonds of an aromatic ring is preferable to an acid anhydride having an aromatic ring such as trimellitic anhydride or pyromellitic anhydride. You may use the acid anhydride compound generally used as a raw material of a polyimide resin.
- Acid anhydride compounds include, for example, phthalic anhydride, maleic anhydride, trimellitic anhydride, pyromellitic anhydride, hexahydrophthalic anhydride, tetrahydrophthalic anhydride, methyl nadic anhydride, nadic anhydride, glutaric anhydride, anhydrous It is at least one selected from the group consisting of dimethyl glutaric acid, diethyl glutaric anhydride, succinic anhydride, methyl hexahydrophthalic anhydride and methyl tetrahydrophthalic anhydride.
- phthalic anhydride trimellitic anhydride, hexahydrophthalic anhydride, tetrahydrophthalic anhydride, methylhexahydrophthalic anhydride, methyltetrahydrophthalic anhydride, glutaric anhydride, dimethylglutaric anhydride and diethylglutaric anhydride preferable.
- the epoxy resin curing agent according to this embodiment may contain an isocyanuric acid derivative as an acid anhydride compound.
- isocyanuric acid derivatives include 1,3,5-tris (1-carboxymethyl) isocyanurate, 1,3,5-tris (2-carboxyethyl) isocyanurate, 1,3,5-tris (3-carboxyl).
- acid anhydrides derived from propyl) isocyanurate or 1,3-bis (2-carboxyethyl) isocyanurate may be used alone or in combination of two or more.
- the epoxy resin curing agent according to this embodiment may further contain a phenolic compound.
- the polyvalent carboxylic acid condensate and the acid anhydride compound have compatibility.
- “The polyvalent carboxylic acid condensate and the acid anhydride compound have compatibility” means that the polyvalent carboxylic acid condensate has an affinity for the acid anhydride compound and the mixture of both exists in a uniform state. It means getting. More specifically, for example, a mixture in which a polyvalent carboxylic acid condensate and an acid anhydride compound are mixed at a mass ratio of 1/1 is heated to 120 ° C. and completely dissolved, and stirred in that state.
- the mixture When the mixture is allowed to stand for 30 minutes and then a part thereof is taken out and visually observed, it can be determined that the mixture is compatible when it can be confirmed that the mixture is a transparent liquid without phase separation. it can. A liquid that is opaque due to phase separation is called "insoluble". Even if the combination has compatibility, if it takes a long time to dissolve, a large amount of heat energy is required for heating for a long time, which is disadvantageous in terms of productivity and cost.
- the epoxy resin curing agent according to the present embodiment preferably contains 10 to 70% by mass of a polyvalent carboxylic acid condensate and 30 to 90% by mass of an acid anhydride compound based on the total amount of the curing agent. .
- the curing agent for epoxy resin according to this embodiment can be obtained, for example, by a method including a mixing step of melt-mixing a polyvalent carboxylic acid condensate, a polyvalent carboxylic acid, and an acid anhydride compound.
- a method in which a polyvalent carboxylic acid condensate and an acid anhydride compound are mixed using a known mixer and then melt-kneaded with a three-roll mill, an extruder or the like if necessary is employed. It can. From the viewpoint of obtaining a cured product having transparency, it is preferable that the mixture of the polyvalent carboxylic acid condensate and the acid anhydride compound has translucency.
- white turbidity due to precipitates does not occur.
- the generation of precipitates prevents the viscosity from increasing. “No white turbidity caused by precipitates” means that there is no scattering of electromagnetic waves in the visible light region. More specifically, when fine particles having scattering centers that cause Rayleigh scattering, Mie scattering, and diffraction scattering phenomenon of light are not present in the mixture, it can be regarded as “no white turbidity due to precipitates”.
- Confirmation of the cloudiness of the mixture can be achieved, for example, by weighing 100 parts by mass of a polyvalent carboxylic acid condensate and 120 parts by mass of an acid anhydride compound in a heat-resistant glass container, and heating the container using a fluid such as silicone oil or water as a medium. Can be carried out by heating in a temperature range of 35 ° C. to 180 ° C.
- the heating method is not limited to this, and a known method such as thermocouple or electromagnetic wave irradiation can be used, and ultrasonic waves or the like may be irradiated to promote dissolution.
- Epoxy resin composition and cured product thereof contains an epoxy resin and the epoxy resin curing agent.
- an epoxy resin the thing similar to the epoxy resin mentioned above can be used.
- the epoxy resin composition preferably has 0.5 to 0.9 equivalent of an active group (an acid anhydride group or a hydroxyl group) in a curing agent capable of reacting with the epoxy group with respect to 1 equivalent of an epoxy group in the epoxy resin. More preferably, a curing agent in a range of 0.5 to 0.8 equivalent is contained.
- an active group an acid anhydride group or a hydroxyl group
- a curing agent in a range of 0.5 to 0.8 equivalent is contained.
- the epoxy resin composition may further contain a curing catalyst (curing accelerator) from the viewpoint of improving curability.
- a curing catalyst curing accelerator
- the curing catalyst is not particularly limited, and examples thereof include 3 such as 1,8-diaza-bicyclo (5,4,0) undecene-7, triethylenediamine and tri-2,4,6-dimethylaminomethylphenol.
- the ratio of the curing catalyst is preferably 0.01 to 8% by mass and more preferably 0.1 to 3% by mass with respect to the epoxy resin. If the ratio of the curing catalyst is less than 0.01% by mass, the curing accelerating effect may be small, and if it exceeds 8% by mass, the effect of suppressing discoloration of the cured product tends to be small.
- the cured product formed by thermal curing of the epoxy resin composition preferably has a high transmittance in the wavelength region from visible light to near ultraviolet light.
- the transmittance is preferably 70% or more, more preferably 80% or more, and particularly preferably 90% or more.
- the epoxy resin composition and the cured product according to the present embodiment are various such as an electrical insulating material, an optical semiconductor sealing material, an adhesive material, a coating material, and an epoxy resin molding material for transfer molding that require high transparency and heat resistance. Useful in various applications.
- the polyvalent carboxylic acid condensate of the present invention can be used as a raw material for polyamide resin or polyester resin.
- a polyamide resin or a polyester resin can be produced by polycondensation of a polyvalent carboxylic acid with a polyamine having two or more amino groups or a polyalcohol having two or more hydroxyl groups.
- a known polymerization method can be applied as a method for polymerizing the polyvalent carboxylic acid condensate with the polyamine or polyester.
- polyamines to be combined with the polyvalent carboxylic acid condensate those generally used as a raw material for polyamide resins can be used, and those with little coloring are preferred.
- a diamine having 2 to 24 carbon atoms is used.
- polyamines include ethylenediamine, trimethylenediamine, tetramethylenediamine, bentamethylenediamine, hexamethylenediamine, heptamethylenediamine, octamethylenediamine, nonamethylenediamine, decamethylenediamine, undecamethylenediamine, dodecamethylenediamine.
- polyalcohol to be combined with the polyvalent carboxylic acid condensate those generally used as a raw material for the polyester resin can be used, and those with little coloring are preferred.
- a dialcohol having 2 to 24 carbon atoms is used.
- the polyalcohol include 1,2-, 1,3-cyclopentanediol, 1,2-, 1,3-cyclopentanedimethanol and bis (hydroxymethyl) tricyclo [5.2.1.
- 5-membered ring diols such as decane, 1,2-, 1,3-, 1,4-cyclohexanediol, 1,2-, 1,3-, 1,4-cyclohexanedimethanol and 2,2- Mention may be made of 6-membered ring diols such as bis- (4-hydroxycyclohexyl) propane.
- the number average molecular weight Mn was measured using a standard polystyrene calibration curve by gel permeation chromatography (GPC) under the following conditions.
- Apparatus Pump (manufactured by Hitachi, Ltd., trade name: L-6200 type), column (manufactured by Tosoh Corporation, trade name: TSKgel-G5000HXL, TSKgel-G2000HXL), detector (trade name, manufactured by Hitachi, Ltd. : L-3300RI type) ⁇
- Eluent Tetrahydrofuran, flow rate 1.0 mL / min ⁇ Measurement temperature: 30 ° C.
- Viscosity measurement was conducted by Research Equipment (London) LTD. This was carried out using an ICI cone plate viscometer made by the manufacturer. Tables 2 and 3 show the viscosities at 150 ° C. when all the curing agent components contained in the resin composition are mixed.
- the softening point was measured using a ring and ball softening point test method according to JIS K 2207. The appearance was judged visually.
- the polyvalent carboxylic acid condensate obtained in the above synthesis example is very easy to handle for producing a thermosetting resin composition in terms of both softening point and viscosity, and is suitable as a curing agent for a thermosetting resin composition. Can be used.
- thermosetting resin composition > (Examples 1 to 14, Comparative Examples 1 to 3) According to the mixing ratio (parts by mass) shown in Tables 2 and 3, after pre-mixing (A) epoxy resin and (B) curing agent, the remaining components were added and mixed thoroughly using a mixer, and then mixed with a mixing roll. The mixture was melt-kneaded under predetermined conditions, cooled and pulverized to prepare thermosetting resin compositions of Examples 1 to 14 and Comparative Examples 1 to 3.
- thermosetting resin composition was transfer molded under the conditions of a molding die temperature of 180 ° C., a molding pressure of 6.9 MPa, and a curing time of 90 seconds, and the following evaluation was performed.
- the evaluation results are shown in Tables 2 and 3.
- thermosetting resin composition was transfer molded under the above conditions, and then post-cured at 150 ° C. for 2 hours to prepare a test piece having a thickness of 1.0 mm.
- the initial optical reflectance (light reflectance) of the test piece at a wavelength of 400 nm was measured using an integrating sphere type spectrophotometer V-750 type (trade name, manufactured by JASCO Corporation).
- the light reflection characteristics were evaluated according to the following evaluation criteria.
- B Light reflectance of 70% or more and less than 80% at a light wavelength of 400 nm
- C Light reflectance of less than 70% at a light wavelength of 400 nm
- thermosetting resin composition was transfer molded under the above conditions using a spiral flow measurement mold in accordance with the standard of EMMI-1-66, and the flow distance (cm) at that time was determined.
- thermosetting resin composition was poured into a mold for burr measurement (see FIG. 7) using a pot, and then cured to form a thermosetting resin composition.
- the mold temperature during molding was 180 ° C.
- the molding pressure was 6.9 MPa
- the resin pouring time was 10 seconds
- the curing temperature was 180 ° C.
- the curing time was 90 seconds.
- the upper mold of the mold for measuring burrs was removed, and the maximum value of the length of burrs generated by flowing through the gap between the upper mold and the lower mold of the mold was measured using calipers.
- FIG. 7 is a diagram schematically showing the structure and burrs of a mold for measuring burrs used when measuring the burr length, (a) is a side sectional view, and (b) is a plan view.
- the burr measurement mold is composed of a pair of an upper mold 400 and a lower mold 401, and the upper mold 400 has a resin injection port 402.
- the lower mold 401 has a cavity 403 facing the resin injection port 402 and six slits 404, 405, 406, 407, 408, and 409 extending from the cavity 403 toward the outer periphery of the mold.
- FIG. 7 is a diagram schematically showing the structure and burrs of a mold for measuring burrs used when measuring the burr length, (a) is a side sectional view, and (b) is a plan view.
- the burr measurement mold is composed of a pair of an upper mold 400 and a lower mold 401, and the upper mold 400 has a resin injection port 402.
- the lower mold 401
- the burr means a portion (resin burr) 410 in which the thermosetting resin composition flows from the outer extension of the cavity 403 along each slit and is cured.
- the “burr length” defined in the present invention refers to the upper mold 400 of the mold from the cavity 403 at the center of the mold when transfer molding is performed using the mold for burr measurement shown in FIG. This is a value obtained by measuring the maximum radial length of the cured product (resin burr 410) that protrudes into the gap between the seam and the lower mold 401 with a caliper.
- the dimensions of the mold for burr measurement are as follows: the outer shape of the upper die 400 and the lower die 401 is (140 mm) ⁇ (140 mm), the diameter of the resin injection port is 7 mm at the top, 4 mm at the bottom, the diameter of the cavity is 30 mm, and the depth of the cavity The depth of the six slits 404 to 409 is 75, 50, 30, 20, 10, and 2 ⁇ m in this order.
- thermosetting resin composition of the present invention is excellent in light reflection characteristics and can reduce burrs, that is, sufficiently reduce resin contamination.
- thermosetting resin composition of the present invention By carrying out transfer molding using the thermosetting resin composition of the present invention, a substrate for mounting an optical semiconductor element in which resin contamination in the optical semiconductor element mounting region is sufficiently reduced can be produced.
- the optical semiconductor element can be mounted in the opening of the optical semiconductor element mounting region, and the optical semiconductor element and the metal wiring can be electrically connected by a known method such as a bonding wire.
- the step of removing burrs is not required in the manufacturing process of the optical semiconductor element mounting substrate, which is very advantageous in terms of productivity such as cost and manufacturing time.
- Example A1 Repeating unit: Hydrogenated terephthalic acid (manufactured by Tokyo Chemical Industry); 125 g Both ends: hydrogenated trimellitic anhydride (manufactured by Mitsubishi Gas Chemical Company); 126 g (Example A2) Repeating unit: hydrogenated terephthalic acid (manufactured by Tokyo Chemical Industry); 218 g Both ends: hydrogenated trimellitic anhydride (manufactured by Mitsubishi Gas Chemical Company); 86 g (Comparative Example A1) Repeating unit: terephthalic acid (manufactured by Wako Pure Chemical Industries); 166 g Both ends: trimellitic anhydride (manufactured by Wako Pure Chemical Industries); 168 g
- the number average molecular weight Mn was measured in the same manner as described above. However, since the polyvalent carboxylic acid condensate of Comparative Example A1 was insoluble in the solvent, its Mn could not be measured.
- Viscosity measurement was conducted by Research Equipment (London) LTD. This was carried out using an ICI cone plate viscometer made by the manufacturer. The softening point and appearance were evaluated by a method in which the obtained compound was heated on a hot plate and the property change was visually confirmed.
- FT-IR Infrared absorption
- UV-Visible Absorption Spectrum A plate-shaped test piece having a thickness of 1.0 mm was produced by processing the polyvalent carboxylic acid condensate of Example A1. The ultraviolet-visible absorption spectrum of this test piece at a wavelength of 300 to 800 nm was measured using a spectrophotometer V-750 type (manufactured by JASCO Corporation). The obtained ultraviolet-visible absorption spectrum is shown in FIG.
- Examples B1 to B6, Comparative Examples B1 to B2 (Curability of epoxy resin composition)
- the polyvalent carboxylic acid condensate of Example A1 and Comparative Example A1, hexahydrophthalic anhydride and methylhexahydrophthalic anhydride were blended according to the blending ratio shown in Table 5, and the blends were melted at 120 ° C., The mixture was stirred until the materials were completely compatible to obtain an acid anhydride type curing agent.
- This curing agent and an epoxy resin (triglycidyl isocyanurate) were blended, heated to 120 ° C., and stirred in a molten state until each material was completely compatible.
- the epoxy resin was blended with the curing agent in such an amount as to have a ratio shown in Table 5 with respect to each component of the curing agent. After that, the heating was stopped, and when the temperature of the compound was lowered to 80 ° C. or lower, a curing catalyst (tetra-n-butylphosphonium-o, o-diethylphosphorodithioate) was added, and the mixture was further stirred to improve the translucency. An epoxy resin composition was obtained.
- the unit of the blending amount of each component in Table 5 is part by mass, and “ ⁇ ” represents that no material was blended.
- the resin compositions of Examples B1 to B6 and Comparative Examples B1 and B2 prepared in this way were evaluated by the following various characteristic tests. The evaluation results are shown in Table 5.
- the obtained resin composition for transfer molding was transfer molded under the conditions of a mold temperature of 180 ° C., a molding pressure of 6.9 MPa, and a curing time of 90 seconds, and the following evaluation was performed.
- the evaluation results are shown in Table 6.
- Spiral flow The resin composition was transfer molded under the above conditions using a spiral flow measurement mold according to the standard of EMMI-1-66, and the flow distance (cm) at that time was determined.
- 2) Hardness under heat The resin composition was transfer molded into a disk shape having a diameter of 50 mm and a thickness of 3 mm under the above molding conditions, and immediately after molding, the hardness of the molded body was measured using a Shore D type hardness meter.
- 3) Gel time Using 3 g of the resin composition as a measurement sample, a torque curve at 180 ° C. was measured with a JSR curast meter, and the time until the rise was defined as gel time (seconds).
- an absorption signal derived from an acid anhydride condensed between molecules was detected as a peak in the infrared absorption spectrum (FT-IR) of the polyvalent carboxylic acid condensate synthesized in the example.
- FT-IR infrared absorption spectrum
- the polyvalent carboxylic acid condensate of Example A1 showed good compatibility with other acid anhydrides such as hexahydrophthalic anhydride and methylhexahydrophthalic anhydride, It was possible to prepare an acid anhydride-based epoxy resin curing agent in combination with an acid anhydride. Furthermore, since the obtained acid anhydride type epoxy resin curing agent is well compatible with a polyfunctional epoxy resin such as triglycidyl isocyanurate, it was possible to prepare a translucent epoxy resin composition. . Furthermore, the translucent cured product obtained by thermosetting the epoxy resin composition did not color even when left in a high temperature environment of 150 ° C., and was a cured product excellent in translucency and heat resistance. .
- the wholly aromatic polyvalent carboxylic acid condensate of Comparative Example A1 has low compatibility with other acid anhydrides, and became cloudy when a mixture obtained by combining this with other acid anhydrides was melt-mixed.
- an epoxy resin composition in which this was combined with an epoxy resin was subjected to a thermosetting reaction, a uniform cured product could not be obtained.
- the resin composition containing the polyvalent carboxylic acid condensate of Examples A1 and A2 as a curing agent component had transfer moldability equivalent to that of a general semiconductor sealing resin composition.
- thermosetting resin composition an epoxy resin molding material, a substrate for mounting an optical semiconductor element using the same, and a method for producing the same, which reduce the occurrence of resin stains during molding and are sufficiently excellent in moldability, and An optical semiconductor device can be provided.
- the polyvalent carboxylic acid condensate according to the present invention is used as a curing agent for a thermosetting resin such as an epoxy resin, the cured product can be made transparent and less colored.
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Abstract
Description
本発明の一実施形態に係る熱硬化性樹脂組成物は、(A)エポキシ樹脂及び(B)硬化剤を含有する熱硬化性樹脂組成物であって、ICIコーンプレート型粘度計によって測定される(B)硬化剤の粘度が、150℃で1.0~1000mPa・sである。
(A)エポキシ樹脂としては、電子部品封止用エポキシ樹脂成形材料で一般に使用されているものを用いることができる。エポキシ樹脂として、例えば、フェノールノボラック型エポキシ樹脂及びオルソクレゾールノボラック型エポキシ樹脂等のフェノール類とアルデヒド類のノボラック樹脂をエポキシ化したもの、ビスフェノールA、ビスフェノールF、ビスフェノールS及びアルキル置換ビスフェノール等のジグリシジルエーテル、ジアミノジフェニルメタン及びイソシアヌル酸等のポリアミンとエピクロルヒドリンとの反応により得られるグリシジルアミン型エポキシ樹脂、オレフィン結合を過酢酸等の過酸で酸化して得られる線状脂肪族エポキシ樹脂、並びに脂環族エポキシ樹脂が挙げられる。これらは、1種を単独で又は2種以上を組み合わせて用いることができる。
本実施形態に係る硬化剤は、多価カルボン酸縮合体を含むものであればよく、ICIコーンプレート型粘度計によって測定される(B)硬化剤の粘度が、150℃で1.0~1000mPa・sであることが好ましく、10~200mPa・sであることがより好ましい。(B)硬化剤の粘度が、係る特定範囲内にあることにより、例えば、多価カルボン酸縮合体を配合した熱硬化性樹脂組成物をトランスファー成形に用いたときに、バリ発生が抑制されるなど、良好な成形性が得られる。硬化剤の粘度を調整する方法としては、多価カルボン酸縮合体の平均分子量を制御することなどにより多価カルボン酸縮合体の粘度を調整する方法や、多価カルボン酸縮合体と、併用可能な硬化剤との配合比を調整する方法が挙げられる。
(GPC条件)
ポンプ:L-6200型(株式会社日立製作所製、商品名)
カラム:TSKgel―G5000HXL及びTSKgel-G2000HXL(東ソー株式会社製、商品名)
検出器:L-3300RI型(株式会社日立製作所製、商品名)
溶離液:テトラヒドロフラン
測定温度:30℃
流量:1.0mL/分
本発明の熱硬化性樹脂組成物には必要に応じて(C)硬化促進剤を配合することができる。(C)硬化促進剤としては、(A)及び(B)成分間の硬化反応を促進させるような触媒機能を有するものであれば、特に限定されることなく用いることができる。硬化促進剤としては、例えば、アミン化合物、イミダゾール化合物、有機リン化合物、アルカリ金属化合物、アルカリ土類金属化合物、第4級アンモニウム塩が挙げられる。これらの硬化促進剤の中でも、アミン化合物、イミダゾール化合物又は有機リン化合物を用いることが好ましい。アミン化合物としては、例えば、1,8-ジアザ-ビシクロ(5,4,0)ウンデセン-7、トリエチレンジアミン、トリ-2,4,6-ジメチルアミノメチルフェノールが挙げられる。また、イミダゾール化合物として、例えば、2-エチル-4-メチルイミダゾールが挙げられる。更に、有機リン化合物としては、例えば、トリフェニルホスフィン、テトラフェニルホスホニウムテトラフェニルボレート、テトラ-n-ブチルホスホニウム-o,o-ジエチルホスホロジチオエート、テトラ-n-ブチルホスホニウム-テトラフルオロボレート、テトラ-n-ブチルホスホニウム-テトラフェニルボレートが挙げられる。これらの硬化促進剤は、1種を単独で又は2種以上を組み合わせて使用してもよい。
光半導体装置等に利用可能な白色の成形樹脂として用いる場合には、本発明の熱硬化性樹脂組成物に更に(D)白色顔料を含むことが好ましい。(D)白色顔料としては、公知のものを使用することができ、特に限定されない。白色顔料として、例えば、アルミナ、酸化マグネシウム、酸化アンチモン、酸化チタン、酸化ジルコニウム及び無機中空粒子が挙げられる。これらは1種を単独で又は2種以上併用することができる。無機中空粒子としては、例えば、珪酸ソーダガラス、アルミ珪酸ガラス、硼珪酸ソーダガラス、シラス(白砂)が挙げられる。白色顔料の粒径は、中心粒径が0.1~50μmであることが好ましい、この中心粒径が0.1μm未満であると粒子が凝集しやすく分散性が低下する傾向があり、50μmを超えると熱硬化性樹脂組成物からなる硬化物の反射特性が十分に得られ難くなる。
(無機充填材)
熱硬化性樹脂組成物は成形性を調整するために、無機充填材を含むことが好ましい。なお、無機充填剤として、上記白色顔料と同様のものを用いてもよい。無機充填材として、例えば、シリカ、酸化アンチモン、酸化チタン、水酸化アルミニウム、水酸化マグネシウム、硫酸バリウム、炭酸マグネシウム、炭酸バリウム、アルミナ、マイカ、ベリリア、チタン酸バリウム、チタン酸カリウム、チタン酸ストロンチウム、チタン酸カルシウム、炭酸アルミニウム、ケイ酸アルミニウム、炭酸カルシウム、ケイ酸カルシウム、ケイ酸マグネシウム、窒化ケイ素、窒化ホウ素、焼成クレー等のクレー、タルク、ホウ酸アルミニウム、ホウ酸アルミニウム、炭化ケイ素が挙げられる。熱伝導性、光反射特性、成形性及び難燃性の点から、無機充填剤は、シリカ、アルミナ、酸化マグネシウム、酸化アンチモン、酸化チタン、酸化ジルコニウム、水酸化アルミニウム、水酸化マグネシウムからなる群から選ばれる2種以上の混合物であることが好ましい。無機充填材の平均粒径は、白色顔料とのパッキング性を向上させる観点から、1~100μmであることが好ましく、1~40μmであることがより好ましい。本実施形態の熱硬化性樹脂組成物における無機充填剤の配合量は、(A)成分及び(B)成分の合計量100質量部に対して、1~1000質量部であることが好ましく、1~800質量部であることがより好ましい。
熱硬化性樹脂組成物には、熱硬化性樹脂成分である(A)~(C)成分と、(D)白色顔料及び必要に応じて添加される無機充填材との接着性を向上させる観点からカップリング剤を添加することが好ましい。カップリング剤としては、特に限定されないが、例えば、シランカップリング剤及びチタネート系カップリング剤が挙げられる。シランカップリング剤としては、一般にエポキシシラン系、アミノシラン系、カチオニックシラン系、ビニルシラン系、アクリルシラン系、メルカプトシラン系及びこれらの複合系が挙げられ、任意の添加量で用いることができる。なお、カップリング剤の配合量は、熱硬化性樹脂組成物全体に対して5質量%以下であることが好ましい。
本実施形態の熱硬化性樹脂組成物は、上記した各種成分を均一に分散混合することで得ることができ、その手段や条件等は特に限定されない。熱硬化性樹脂組成物を作製する一般的な方法として、各成分を押出機、ニーダー、ロール、エクストルーダー等によって混練した後、混練物を冷却し、粉砕する方法を挙げることができる。各成分を混練する際には、分散性を向上する観点から、溶融状態で行うことが好ましい。混練の条件は、各成分の種類や配合量により適宜決定すればよく、例えば、15~100℃で5~40分間混練することが好ましく、20~100℃で10~30分間混練することがより好ましい。混練温度が15℃未満であると、各成分を混練させ難くなり、分散性も低下する傾向にあり、100℃を超えると、樹脂組成物の高分子量化が進行し、樹脂組成物が硬化してしまう可能性がある。また、混練時間が5分未満であると、トランスファー成形時に樹脂バリが発生してしまう可能性がある。混練時間が40分を超えると、樹脂組成物の高分子量化が進行し、樹脂組成物が硬化してしまう可能性がある。
本発明のエポキシ樹脂成形材料は、上記(A)エポキシ樹脂及び上記(B)硬化剤を含有するエポキシ樹脂成形材料であって、(B)硬化剤が上述の多価カルボン酸縮合体を含むものである。
本発明の半導体素子搭載用基板は、底面及び壁面から構成される凹部を有し、凹部の底面が光半導体素子搭載部であり、凹部の壁面の少なくとも一部が本発明の熱硬化性樹脂組成物の硬化物からなるものである。図1は、本発明の光半導体素子搭載用基板の一実施形態を示す斜視図である。光半導体素子搭載用基板110は、Ni/Agめっき104が形成された金属配線105と、リフレクター103とを備え、Ni/Agめっき104が形成された金属配線105とリフレクター103とから形成されたる凹部200を有している。すなわち、凹部200の底面はNi/Agめっき104が形成された金属配線105から構成され、凹部の壁面はリフレクター103から構成されるものであり、リフレクター103は、上記本発明の熱硬化性樹脂組成物の硬化物からなる成形体である。
本発明の光半導体装置は、上記光半導体素子搭載用基板と、光半導体素子搭載用基板の凹部内に設けられた光半導体素子と、凹部を充填して光半導体素子を封止する封止樹脂部とを備えるものである。
本発明の多価カルボン酸縮合体は、通常、重合度の異なる複数の成分から構成され、繰り返し単位及び末端基の構成が異なる複数の成分を含み得る。本実施形態に係る多価カルボン酸縮合体は、下記一般式(I)で表される成分を主成分として含む。好ましくは、式(I)の成分の割合は多価カルボン酸縮合体全量を基準として10質量%以上である。
本実施形態に係るエポキシ樹脂用硬化剤は、多価カルボン酸縮合体と、多価カルボン酸のカルボキシル基を分子内で脱水縮合させて得ることのできる酸無水物化合物とを含有する酸無水物系の硬化剤である。多価カルボン酸縮合体と組み合わせる酸無水物化合物としては、電子部品封止用エポキシ樹脂成形材料、光半導体封止用エポキシ樹脂成形材料等において一般に使用されているものを用いることができる。酸無水物化合物はエポキシ樹脂と反応するものであれば、特に制限なく用いることができるが、無色又は淡黄色であることが好ましい。
本実施形態に係るエポキシ樹脂組成物は、エポキシ樹脂と、上記エポキシ樹脂用硬化剤とを含有する。エポキシ樹脂としては、上述したエポキシ樹脂と同様のものを用いることができる。
本発明の多価カルボン酸縮合体は、ポリアミド樹脂又はポリエステル樹脂の原料として用いることが可能である。多価カルボン酸を2以上のアミノ基を有するポリアミン、又は2以上のヒドロキシル基を有するポリアルコールと重縮合させることにより、ポリアミド樹脂又はポリエステル樹脂を製造することができる。多価カルボン酸縮合物とポリアミン又はポリエステルとの重合の方法としては公知の重合方法を適用することができる。
下記の合成例A1、A2及びA3にそれぞれ示した繰り返し単位用モノマーと両末端用のモノマーとを、無水酢酸中で5~60分にわたって窒素雰囲気下で還流した後、温度を180℃まで上昇させ、窒素気流下、開放系で反応によって生成した酢酸及び水を留去した。揮発成分が認められなくなったところで、反応容器内を減圧しながら180℃の温度で1~15時間にわたって溶融縮合し、多価カルボン酸縮合体を得た。
(合成例A1)
繰り返し単位:水素化テレフタル酸(東京化成社製);125g
両末端:水素化-1,2-無水トリメリット酸(三菱ガス化学社製);126g
(合成例A2)
繰り返し単位:水素化テレフタル酸(東京化成社製);218g
両末端:水素化無水トリメリット酸(三菱ガス化学社製);86g
(合成例A3)
繰り返し単位:なし
両末端:水素化-1,2-無水トリメリット酸(三菱ガス化学社製);100g
合成例A1、A2及びA3の多価カルボン酸縮合体の数平均分子量、粘度、軟化点及び外観を評価した。その結果を表1に示す。
・装置:ポンプ(株式会社日立製作所製、商品名:L-6200型)、カラム(東ソー株式会社製、商品名:TSKgel―G5000HXL、TSKgel-G2000HXL)、検出器(株式会社日立製作所製、商品名:L-3300RI型)
・溶離液:テトラヒドロフラン、流量1.0mL/分
・測定温度:30℃
(実施例1~14、比較例1~3)
表2及び3に示した配合比(質量部)に従い、(A)エポキシ樹脂、(B)硬化剤を予備混合した後、残りの成分を加え、ミキサーを用いて十分混合した後、ミキシングロールにより所定条件で溶融混練し、冷却、粉砕を行い、実施例1~14及び比較例1~3の熱硬化性樹脂組成物を作製した。
得られた熱硬化性樹脂組成物を成形金型温度180℃、成形圧力6.9MPa、キュア時間90秒の条件でトランスファー成形し、下記の評価を行った。評価結果を表2及び3に示す。
得られた熱硬化性樹脂組成物を上述の条件でトランスファー成形した後、150℃で2時間ポストキュアして、厚み1.0mmのテストピースを作製した。積分球型分光光度計V-750型(日本分光株式会社製、商品名)を用いて、波長400nmにおける上記テストピースの初期光学反射率(光反射率)を測定した。そして、下記の評価基準により光反射特性を評価した。
A:光波長400nmにおいて光反射率80%以上
B:光波長400nmにおいて光反射率70%以上、80%未満
C:光波長400nmにおいて光反射率70%未満
(スパイラルフロー)
EMMI-1-66の規格に準じたスパイラルフロー測定用金型を用いて、熱硬化性樹脂組成物を上記条件でトランスファー成形し、そのときの流動距離(cm)を求めた。
得られた熱硬化性樹脂組成物を、ポットを用いて、バリ測定用金型(図7を参照)に流し込み、次いで硬化させることによって熱硬化性樹脂組成物を成形した。なお、成形時の金型温度は180℃、成形圧力は6.9MPa、樹脂の流し込み時間(トランスファー時間)は10秒であり、硬化温度は180℃、硬化時間は90秒とした。成形後、バリ測定用金型の上型を外し、成形時に金型の上型と下型との隙間を流れて生じたバリの長さの最大値を、ノギスを使用して測定した。
*1:トリスグリシジルイソシアヌレート(エポキシ当量100、日産化学社製、商品名:TEPIC-S)
*2:3,4-エポキシシクロヘキセニルメチル-3’,4’-エポキシシクロヘキセンカルボキシレート(ダイセル化学社製、商品名:セロキサイド2021P)
*3:ヘキサヒドロ無水フタル酸(和光純薬工業社製)
*4:水素化-1,2-無水トリメリット酸(三菱ガス化学社製)
*5:テトラ-n-ブチルホスホニウム-o,o-ジエチルホスホロジチエート(日本化学工業社製、商品名:PX-4ET)
*6:トリメトキシエポキシシラン(東レダウコーニング社製、商品名:A-187)
*7:溶融シリカ(電気化学工業社製、商品名:FB-301)
*8:中空粒子(住友3M社製、商品名:S60-HS)
*9:アルミナ(アドマテックス社製、商品名:AO-25R)
下記の実施例A1、A2及び比較例A1にそれぞれ示した繰り返し単位用のモノマーと両末端モノマーを、無水酢酸中で5~30分にわたって窒素雰囲気下で還流した。その後、液温を180℃まで上昇させ、窒素気流下、開放系で反応によって生成した酢酸及び水を留去した。揮発成分の生成が認められなくなったところで、反応容器内を減圧しながら150℃で3時間にわたって溶融縮合し、多価カルボン酸縮合体を得た。
(実施例A1)
繰り返し単位:水素化テレフタル酸(東京化成社製);125g
両末端:水素化無水トリメリット酸(三菱ガス化学社製);126g
(実施例A2)
繰り返し単位:水素化テレフタル酸(東京化成社製);218g
両末端:水素化無水トリメリット酸(三菱ガス化学社製);86g
(比較例A1)
繰り返し単位:テレフタル酸(和光純薬社製);166g
両末端:トリメリット酸無水物(和光純薬社製);168g
実施例A1、A2及び比較例A1の多価カルボン酸縮合体の数平均分子量、粘度、軟化点、赤外吸収スペクトル、紫外-可視吸収スペクトル及び外観を評価した。評価結果を表4に示した。
実施例A1の多価カルボン酸縮合体のテトラヒドロフラン溶液をKRs結晶基板上でキャストして試料セルを作製し、波数4000~400cm-1における赤外吸収スペクトルをBIORAD製FTS300MX型分光光度計を用いて測定した。得られた赤外吸収スペクトルを図8に示した。
実施例A1の多価カルボン酸縮合体を加工して厚み1.0mmの板状のテストピースを作製した。このテストピースの波長300~800nmにおける紫外-可視吸収スペクトルを分光光度計V-750型(日本分光株式会社製)を用いて測定した。得られた紫外-可視吸収スペクトルを図9に示した。
(エポキシ樹脂組成物の硬化性)
実施例A1及び比較例A1の多価カルボン酸縮合体、ヘキサヒドロ無水フタル酸及びメチルヘキサヒドロ無水フタル酸を表5に示した配合比に従って配合し、それぞれの配合物を120℃で溶融させ、各材料が完全に相溶するまで攪拌して、酸無水物系の硬化剤を得た。この硬化剤とエポキシ樹脂(トリグリシジルイソシアヌレート)を配合し、120℃に加熱して、各材料が完全に相溶するまで溶融状態で攪拌した。エポキシ樹脂は、硬化剤の各成分に対して表5に示す比率となるような量で硬化剤と配合した。その後加熱を止め、配合物の温度が80℃以下まで下がったところで硬化触媒(テトラ-n-ブチルホスホニウム-o,o-ジエチルホスホロジチエート)を加え、さらによく攪拌して、透光性を有するエポキシ樹脂組成物を得た。表5中の各成分の配合量の単位は質量部であり、「-」は材料が配合されなかったことを表す。このようにして準備した実施例B1~B6及び比較例B1、B2の樹脂組成物を下記の各種特性試験によりそれぞれ評価した。評価結果を表5に示す。
各樹脂組成物及びその硬化物を目視で確認することにより、それぞれの相溶性、透明性及び色を評価した。硬化物の色は、硬化後(初期)と、150℃で4時間硬化物を放置した後において評価した。
各樹脂組成物を、100℃で4時間の加熱と、その後の150℃で2時間のポストキュアにより、厚み1.0mmの硬化物をテストピースとして作製した。このテストピースの波長460nmにおける光透過率を、分光光度計V-750型(日本分光株式会社製)を用いて測定した。
*1:トリスグリシジルイソシアヌレート(エポキシ当量100、日産化学社製、商品名:TEPIC-S)
*2:3,4-エポキシシクロヘキセニルメチル-3’,4’-エポキシシクロヘキセンカルボキシレート(ダイセル化学社製、商品名:セロキサイド2021P)
*3:ヘキサヒドロフタル酸ジグリシジルエステル(阪本薬品社製、商品名:SR-HHPA)
*4:ヘキサヒドロ無水フタル酸(和光純薬工業社製)
*5:メチルヘキサヒドロ無水フタル酸(日立化成工業社製)
*6:テトラ-n-ブチルホスホニウム-o,o-ジエチルホスホロジチエート(日本化学工業社製、商品名:PX-4ET)
多価カルボン酸縮合体を配合したエポキシ樹脂組成物の応用例として、トランスファー成形用樹脂組成物の製造とその評価を行った。
実施例A1及びA2の多価カルボン酸縮合体とその他の成分を表6に示した配合比に従って配合した。配合物を、ミキサーによって十分混合してからミキシングロールにより所定条件で溶融混練し、冷却してから粉砕して、実施例C1~C6のトランスファー成形用樹脂組成物を得た。表6中の各成分の配合量の単位は質量部である。空欄は成分を配合しなかったことを表す。
得られたトランスファー成形用樹脂組成物を成形型温度180℃、成型圧力6.9MPa、キュア時間90秒の条件でトランスファー成形し、下記の評価を行った。評価結果を表6に示す。
1)スパイラルフロー
EMMI-1-66の規格に準じたスパイラルフロー測定用金型を用いて、樹脂組成物を上記条件でトランスファー成形し、そのときの流動距離(cm)を求めた。
2)熱時硬度
樹脂組成物を上記の成形条件で直径50mm×厚さ3mmの円板状にトランスファー成形し、成形後直ちにショアD型硬度計を用いて成形体の硬度を測定した。
3)ゲルタイム
樹脂組成物3gを測定サンプルとして用い、JSR製キュラストメータによって180℃におけるトルク曲線を測定し、その立ち上がりまでの時間をゲルタイム(秒)とした。
*1:トリスグリシジルイソシアヌレート(日産化学社製、商品名TEPIC-S)
*2:ヘキサヒドロ無水フタル酸(和光純薬社製)
*4:テトラ-n-ブチルホスホニウム-o,o-ジエチルホスホロジチエート(日本化学工業社製、商品名PX-4ET)
*5:トリメトキシエポキシシラン(東レダウコーニング社製、商品名A-187)
*6:溶融シリカ(電気化学工業社製、商品名FB-301)
*7:中空粒子(住友3M社製、商品名S60-HS)
*8:アルミナ(アドマテックス社製、商品名AO-802)
Claims (53)
- (A)エポキシ樹脂及び(B)硬化剤を含有するエポキシ樹脂成形材料であって、前記(B)硬化剤が多価カルボン酸縮合体を含むエポキシ樹脂成形材料。
- 前記(B)硬化剤の配合量が、前記(A)エポキシ樹脂100質量部に対して10~150質量部である、請求項1記載のエポキシ樹脂成形材料。
- (A)エポキシ樹脂中に含まれるエポキシ基と、当該エポキシ基と反応可能な(B)硬化剤中に含まれる酸無水物基との当量比が、1:0.3~1:1.2である、請求項1又は2記載のエポキシ樹脂成形材料。
- (D)白色顔料を更に含有する、請求項1~3のいずれか一項に記載のエポキシ樹脂成形材料。
- 前記(D)白色顔料が、アルミナ、酸化マグネシウム、酸化アンチモン、酸化チタン、酸化ジルコニウム及び無機中空粒子からなる群より選ばれる少なくとも1種の無機物を含む、請求項4記載のエポキシ樹脂成形材料。
- 前記(D)白色顔料の中心粒径が、0.1~50μmである、請求項4又は5記載のエポキシ樹脂成形材料。
- 前記(D)白色顔料の配合量が、熱硬化性樹脂組成物全体に対して10~85体積%である、請求項4~6のいずれか一項に記載のエポキシ樹脂成形材料。
- (A)エポキシ樹脂及び(B)硬化剤を含有する熱硬化性樹脂組成物であって、
ICIコーンプレート型粘度計によって測定される前記(B)硬化剤の粘度が、150℃で1.0~1000mPa・sである、熱硬化性樹脂組成物。 - 前記(B)硬化剤が多価カルボン酸縮合体を含む、請求項8記載の熱硬化性樹脂組成物。
- 前記多価カルボン酸縮合体の数平均分子量が300~20000である、請求項9記載の熱硬化性樹脂組成物。
- ICIコーンプレート型粘度計によって測定される前記多価カルボン酸縮合体の粘度が、150℃で10~30000mPa・sである、請求項9又は10記載の熱硬化性樹脂組成物。
- 前記Rxが、脂肪族炭化水素環を有し該脂肪族炭化水素環がハロゲン原子又は直鎖状若しくは分岐状の炭化水素基で置換されていてもよい2価の基であり、前記Ryが、酸無水物基又はカルボン酸エステル基で置換されていてもよい1価の炭化水素基である、請求項12記載の熱硬化性樹脂組成物。
- 前記Rxが、脂肪族炭化水素環を有し該脂肪族炭化水素環がハロゲン原子又は直鎖状若しくは分岐状の炭化水素基で置換されていてもよい2価の基であり、前記Ryが、酸無水物基又はカルボン酸エステル基で置換されていてもよい1価の炭化水素基である、請求項17記載の熱硬化性樹脂組成物。
- 前記多価カルボン酸縮合体の数平均分子量が300~20000である、請求項17~21のいずれか一項に記載の熱硬化性樹脂組成物。
- ICIコーンプレート型粘度計によって測定される前記多価カルボン酸縮合体の粘度が、150℃で10~30000mPa・sである、請求項17~22のいずれか一項に記載の熱硬化性樹脂組成物。
- 前記エポキシ樹脂が、2以上のエポキシ基を有するエポキシ樹脂を含む、請求項請求項17~23のいずれか一項に記載の熱硬化性樹脂組成物。
- 前記エポキシ樹脂が、シクロブタン、シクロペンタン、シクロヘキサン、シクロへプタン、シクロオクタン、ノルボルネン、ジシクロペンタジエン、アダマンタン、水素化ナフタレン及び水素化ビフェニルから選ばれる環式脂肪族炭化水素から水素原子を除くことにより誘導される基を有し、前記環式脂肪族炭化水素がハロゲン原子又は直鎖状若しくは分岐状の炭化水素基で置換されていてもよい脂環式エポキシ樹脂である、請求項17~24のいずれか一項に記載の熱硬化性樹脂組成物。
- 前記(B)硬化剤が、多価カルボン酸が分子内で閉環縮合してなる酸無水物を更に含む、請求項8~25のいずれか一項に記載の熱硬化性樹脂組成物。
- 前記(B)硬化剤の配合量が、前記(A)エポキシ樹脂100質量部に対して10~150質量部である、請求項8~27のいずれか一項に記載の熱硬化性樹脂組成物。
- (A)エポキシ樹脂中に含まれるエポキシ基と、当該エポキシ基と反応可能な(B)硬化剤中に含まれる酸無水物基との当量比が、1:0.3~1:1.2である、請求項8~28のいずれか一項に記載の熱硬化性樹脂組成物。
- (D)白色顔料を更に含有する、請求項8~29のいずれか一項に記載の熱硬化性樹脂組成物。
- 前記(D)白色顔料が、アルミナ、酸化マグネシウム、酸化アンチモン、酸化チタン、酸化ジルコニウム及び無機中空粒子からなる群より選ばれる少なくとも1種の無機物を含む、請求項30記載の熱硬化性樹脂組成物。
- 請求項24又は25記載の熱硬化性樹脂組成物を熱硬化させて得ることのできる、硬化物。
- 透明性を有する請求項32記載の硬化物。
- 底面及び壁面から構成される凹部を有し、
前記凹部の底面が光半導体素子搭載部であり、前記凹部の壁面の少なくとも一部が、請求項4~7のいずれか一項に記載のエポキシ樹脂成形材料の硬化物、又は、請求項30又は31記載の熱硬化性樹脂組成物の硬化物からなる、光半導体素子搭載用基板。 - 底面及び壁面から構成される凹部を有する光半導体素子搭載用基板の製造方法であって、
前記凹部の壁面の少なくとも一部を、請求項4~7のいずれか一項に記載のエポキシ樹脂成形材料、又は、請求項30又は31記載の熱硬化性樹脂組成物を用いて形成する工程を備える、光半導体素子搭載用基板の製造方法。 - 底面及び壁面から構成される凹部を有する光半導体素子搭載用基板と、
前記光半導体素子搭載用基板の凹部内に設けられた光半導体素子と、
前記凹部を充填して前記光半導体素子を封止する封止樹脂部と、
を備え、
前記凹部の壁面の少なくとも一部が、請求項4~7のいずれか一項に記載のエポキシ樹脂成形材料の硬化物、又は、請求項30又は31記載の熱硬化性樹脂組成物の硬化物からなる、光半導体装置。 - Rxがシクロブタン、シクロペンタン、シクロヘキサン、シクロへプタン、シクロオクタン、ノルボルネン、ジシクロペンタジエン、アダマンタン、水素化ナフタレン及び水素化ビフェニルから選ばれる環式脂肪族炭化水素から水素原子を除くことにより誘導される2価の基であり、前記環式脂肪族炭化水素がハロゲン原子又は直鎖状若しくは分岐状の炭化水素基で置換されていてもよい、請求項37記載の多価カルボン酸縮合体。
- n1が1~200の整数である、請求項37~43いずれか一項に記載の多価カルボン酸縮合体。
- 数平均分子量Mnが300~20000である、請求項37~44いずれか一項に記載の多価カルボン酸縮合体。
- ICIコーンプレート型粘度計によって測定される粘度が、150℃で10~30000mPa・sである、請求項37~45のいずれか一項に記載の多価カルボン酸縮合体。
- 前記反応液が、無水酢酸、無水プロピオン酸、塩化アセチル、脂肪族酸塩化物及び有機塩基から選ばれる化合物を更に含む、請求項47記載の製造方法。
- 請求項37~46のいずれか一項に記載の多価カルボン酸縮合体を含有するエポキシ樹脂用硬化剤。
- 多価カルボン酸のカルボキシル基を分子内で脱水縮合させて得ることのできる酸無水物化合物を更に含有する、請求項49記載のエポキシ樹脂用硬化剤。
- 請求項37~46のいずれか一項に記載の多価カルボン酸縮合体と多価カルボン酸のカルボキシル基を分子内で脱水縮合させて得られる酸無水物化合物とを溶融混合する工程を備える、エポキシ樹脂用硬化剤の製造方法。
- 請求項37~46のいずれか一項に記載の多価カルボン酸縮合体と、2以上のアミノ基を有するポリアミンとの重縮合により得ることのできる、ポリアミド樹脂。
- 請求項37~46のいずれか一項に記載の多価カルボン酸縮合体と、2以上のヒドロキシル基を有するポリアルコールとの重縮合により得ることのできる、ポリエステル樹脂。
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US12/735,355 US8585272B2 (en) | 2008-01-09 | 2009-01-09 | Thermosetting resin composition, epoxy resin molding material, and polyvalent carboxylic acid condensate |
KR1020177008892A KR101895831B1 (ko) | 2008-01-09 | 2009-01-09 | 열경화성 수지 조성물, 에폭시 수지 성형 재료 및 다가 카르복시산 축합체 |
EP09700600.1A EP2233507B1 (en) | 2008-01-09 | 2009-01-09 | Thermosetting resin composition, epoxy resin molding material, and polyvalent carboxylic acid condensate |
EP13165927.8A EP2631256B1 (en) | 2008-01-09 | 2009-01-09 | Thermosetting resin composition, epoxy resin molding material, and polyvalent carboxylic acid condensate |
CN2009801018014A CN101910239B (zh) | 2008-01-09 | 2009-01-09 | 热固化性树脂组合物、环氧树脂成形材料及多元羧酸缩合体 |
KR1020157034248A KR20150140868A (ko) | 2008-01-09 | 2009-01-09 | 열경화성 수지 조성물, 에폭시 수지 성형 재료 및 다가 카르복시산 축합체 |
US12/805,445 US8637593B2 (en) | 2008-01-09 | 2010-07-30 | Thermosetting resin composition, epoxy resin molding material, and polyvalent carboxylic acid condensate |
US14/056,771 US9067906B2 (en) | 2008-01-09 | 2013-10-17 | Thermosetting resin composition, epoxy resin molding material, and polyvalent carboxylic acid condensate |
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US12/805,445 Continuation-In-Part US8637593B2 (en) | 2008-01-09 | 2010-07-30 | Thermosetting resin composition, epoxy resin molding material, and polyvalent carboxylic acid condensate |
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CN102985463A (zh) * | 2010-07-30 | 2013-03-20 | 日立化成工业株式会社 | 多元羧酸缩合物、热固化性树脂组合物、光半导体元件搭载用基板及其制造方法、以及光半导体装置 |
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CN102604045A (zh) * | 2012-03-22 | 2012-07-25 | 华东理工大学 | 环氧树脂组合物及使用其制备胶膜、预浸料、复合材料的方法 |
JP2016044214A (ja) * | 2014-08-21 | 2016-04-04 | ダイヤプラスフィルム株式会社 | ポリ塩化ビニル系樹脂組成物及び該樹脂組成物からなるシート又はフィルム |
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JP2018519673A (ja) * | 2015-07-07 | 2018-07-19 | ルミレッズ ホールディング ベーフェー | 光を発するデバイス |
JP7038039B2 (ja) | 2015-07-07 | 2022-03-17 | ルミレッズ ホールディング ベーフェー | 光を発するデバイス |
JP2016006898A (ja) * | 2015-08-10 | 2016-01-14 | 大日本印刷株式会社 | 樹脂付リードフレームおよびその製造方法、ならびに半導体装置およびその製造方法 |
JP2017143276A (ja) * | 2017-03-02 | 2017-08-17 | 大日本印刷株式会社 | 樹脂付リードフレームおよびその製造方法、ならびに半導体装置およびその製造方法 |
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CN101910239B (zh) | 2013-11-06 |
CN104650020A (zh) | 2015-05-27 |
US20110039978A1 (en) | 2011-02-17 |
TW201329129A (zh) | 2013-07-16 |
KR101575209B1 (ko) | 2015-12-07 |
CN104650020B (zh) | 2017-11-17 |
EP2631256B1 (en) | 2020-03-11 |
CN102977336B (zh) | 2016-03-30 |
CN102659999B (zh) | 2016-01-06 |
MY152101A (en) | 2014-08-15 |
CN102659999A (zh) | 2012-09-12 |
TW200938560A (en) | 2009-09-16 |
US8585272B2 (en) | 2013-11-19 |
EP2233507A1 (en) | 2010-09-29 |
CN101910239A (zh) | 2010-12-08 |
KR20170038196A (ko) | 2017-04-06 |
KR20100110769A (ko) | 2010-10-13 |
EP2233507A4 (en) | 2012-02-08 |
KR20150140868A (ko) | 2015-12-16 |
TWI483962B (zh) | 2015-05-11 |
EP2631256A1 (en) | 2013-08-28 |
KR101895831B1 (ko) | 2018-09-07 |
TWI452056B (zh) | 2014-09-11 |
CN102977336A (zh) | 2013-03-20 |
EP2233507B1 (en) | 2013-06-05 |
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