WO2019131413A1 - 熱硬化性組成物、熱硬化性樹脂改質剤、その硬化物、半導体封止材料、プリプレグ、回路基板及びビルドアップフィルム - Google Patents
熱硬化性組成物、熱硬化性樹脂改質剤、その硬化物、半導体封止材料、プリプレグ、回路基板及びビルドアップフィルム Download PDFInfo
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L63/00—Compositions of epoxy resins; Compositions of derivatives of epoxy resins
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/24—Impregnating materials with prepolymers which can be polymerised in situ, e.g. manufacture of prepregs
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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
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/24—Crosslinking, e.g. vulcanising, of macromolecules
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- C08L101/00—Compositions of unspecified macromolecular compounds
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- C08L101/00—Compositions of unspecified macromolecular compounds
- C08L101/02—Compositions of unspecified macromolecular compounds characterised by the presence of specified groups, e.g. terminal or pendant functional groups
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- C—CHEMISTRY; METALLURGY
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- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
- C08L75/04—Polyurethanes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/28—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection
- H01L23/29—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection characterised by the material, e.g. carbon
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/28—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection
- H01L23/29—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection characterised by the material, e.g. carbon
- H01L23/293—Organic, e.g. plastic
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/28—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection
- H01L23/31—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection characterised by the arrangement or shape
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/03—Use of materials for the substrate
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/03—Use of materials for the substrate
- H05K1/0313—Organic insulating material
- H05K1/0353—Organic insulating material consisting of two or more materials, e.g. two or more polymers, polymer + filler, + reinforcement
- H05K1/0366—Organic insulating material consisting of two or more materials, e.g. two or more polymers, polymer + filler, + reinforcement reinforced, e.g. by fibres, fabrics
Definitions
- the present invention relates to a thermosetting composition, a thermosetting resin modifier, a cured product thereof, a semiconductor sealing material using the same, a prepreg, a circuit board, and a buildup film.
- thermosetting resin is used as a sealing material for protecting semiconductor elements such as capacitors, diodes, transistors, and thyristors and integrated circuits such as ICs and LSIs.
- semiconductor elements such as capacitors, diodes, transistors, and thyristors and integrated circuits such as ICs and LSIs.
- semiconductor sealing materials are required to have low thermal expansion and the like.
- thermosetting resin composition containing an aromatic amine compound, an aliphatic amine compound, a siloxane compound, and a maleimide compound is proposed (for example, refer patent document 1). Further, a resin composition containing a cyanate ester resin and a naphthylene ether type epoxy resin has been proposed (see, for example, Patent Document 2).
- the object of the present invention is a thermosetting composition capable of achieving good copper foil adhesion, elastic modulus, heat resistance and toughness in a well-balanced manner in the obtained cured product, a thermosetting resin modifier, It is providing the hardened
- the present invention is a thermosetting composition
- a thermosetting resin comprising a thermosetting resin, a thermosetting agent, and a modified resin, wherein the modified resin has at least one selected from the group consisting of a hydroxyl group and a carboxy group.
- a thermosetting resin characterized in that it is a resin, the glass transition temperature of the modified resin is -100 ° C. or more and 50 ° C. or less, and the number average molecular weight of the modified resin is 600 or more and 50,000 or less Use the composition.
- thermosetting composition of the present invention it is possible to develop excellent heat resistance, copper foil adhesion, and toughness in the cured product obtained.
- FIG. 1 is an atomic force microscope image of a fracture surface of a cured product of Example 1.
- FIG. 2 is an atomic force microscope image of the fracture surface of the cured product of Example 2.
- FIG. 3 is an atomic force microscope image of a fracture surface of the cured product of Example 3.
- FIG. 4 is an atomic force microscope image of a fracture surface of a cured product of Example 4.
- FIG. 5 is an atomic force microscope image of a fracture surface of the cured product of Comparative Example 1.
- FIG. 6 is an atomic force microscope image of the fracture surface of the cured product of Comparative Example 2.
- thermosetting composition of the present invention comprises a thermosetting resin (A), a thermosetting agent (B) and a modified resin (C).
- the thermosetting composition may contain an inorganic filler (D), and may further contain a flame retardant (E) and the like.
- thermosetting resin (A) examples include an epoxy resin, a benzoxazine structure-containing resin, a maleimide resin, a vinyl benzyl compound, an acrylic compound, a copolymer of styrene and maleic anhydride, and the like, and includes at least an epoxy resin. Is preferred.
- epoxy resin one type or two or more types can be used.
- bisphenol A type epoxy resin bisphenol F type epoxy resin, biphenyl type epoxy resin, tetramethylbiphenyl type epoxy resin, diglycidyl oxynaphthalene compound ( 1,6-diglycidyl oxynaphthalene, 2,7-diglycidyl oxynaphthalene etc.)
- phenol novolac epoxy resin cresol novolac epoxy resin
- bisphenol A novolac epoxy resin triphenylmethane epoxy resin, tetraphenylethane type Epoxy resin, dicyclopentadiene-phenol addition reaction type epoxy resin, phenol aralkyl type epoxy resin, naphthol novolac type epoxy resin, naphthol aralkyl type epoxy resin, Tall-phenol co-convoluted novolac epoxy resin, naphthol-cresol co-convoluted novolac epoxy resin, aromatic hydrocarbon formaldehyde resin modified phenolic resin-based epoxy resin, biphen
- cresol novolac epoxy resin cresol novolac epoxy resin, phenol aralkyl epoxy resin, biphenyl novolac epoxy resin, naphthol novolac epoxy resin containing naphthalene skeleton, naphthol aralkyl epoxy resin, naphthol-phenol co-contracted novolak as the epoxy resin Type epoxy resin, naphthol-cresol co-convoluted novolak type epoxy resin, crystalline biphenyl type epoxy resin, tetramethylbiphenyl type epoxy resin, xanthene type epoxy resin, alkoxy group-containing aromatic ring modified novolac type epoxy resin (formaldehyde glycidyl A compound in which a group-containing aromatic ring and an alkoxy group-containing aromatic ring are linked is particularly preferable in that a cured product having excellent heat resistance can be obtained.
- the content of the epoxy resin is preferably 80% by mass or more, more preferably 90% by mass or more, still more preferably 95% by mass or more, and the upper limit is 100% by mass.
- maleimide resin 1 type (s) or 2 or more types can be used,
- resin represented by either of the following structural formula is mentioned.
- R 1 represents a monovalent organic group
- R 2 and R 3 each independently represent a hydrogen atom, a halogen atom, an alkyl group having 1 to 20 carbon atoms, or 6 to 6 carbon atoms 20 aryl groups are represented, and a1 represents an integer of 1 or more.
- R 4 , R 5 and R 6 each independently represent a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, an aryl group having 6 to 20 carbon atoms, or 7 to 20 carbon atoms
- L 1 and L 2 each independently represent a saturated hydrocarbon group having 1 to 5 carbon atoms, or 6 to 10 carbon atoms. Or a group having 6 to 15 carbon atoms in which an aromatic hydrocarbon group or a saturated hydrocarbon group and an aromatic hydrocarbon group are combined.
- a3, a4 and a5 each independently represent an integer of 1 to 3, and n represents an integer of 0 to 10.
- the content of the thermosetting resin (A) is preferably 70% by mass or more, more preferably 80% by mass or more, and still more preferably 90% by mass or more, in the nonvolatile component of the thermosetting composition. Is 99% by mass or less, more preferably 98% by mass or less.
- the thermosetting agent (B) may be a compound capable of reacting with the thermosetting resin (A) by heating to cure the thermosetting composition, and one or more kinds can be used. And amine compounds, amide compounds, active ester resins, acid anhydrides, phenol resins, cyanate ester resins and the like. Among them, the thermosetting agent (B) preferably contains at least one selected from an active ester resin, a phenol resin and a cyanate resin.
- amine compound examples include diaminodiphenylmethane, diethylenetriamine, triethylenetetramine, diaminodiphenyl sulfone, isophorone diamine, imidazole, BF 3 -amine complex, guanidine derivative and the like.
- amide compound examples include dicyandiamide, and a polyamide resin synthesized from a dimer of linolenic acid and ethylene diamine.
- the active ester resin is not particularly limited, but generally an ester group having high reaction activity such as phenol ester, thiophenol ester, N-hydroxyamine ester, ester of heterocyclic hydroxy compound is contained in one molecule. Compounds having two or more are preferably used.
- the active ester resin is preferably one obtained by condensation reaction of a carboxylic acid compound and / or a thiocarboxylic acid compound with a hydroxy compound and / or a thiol compound.
- an active ester resin obtained from a carboxylic acid compound or a halide thereof and a hydroxy compound is preferable, and an active ester resin obtainable from a carboxylic acid compound or a halide thereof and a phenol compound and / or a naphthol compound More preferable.
- the carboxylic acid compound include benzoic acid, acetic acid, succinic acid, maleic acid, itaconic acid, phthalic acid, isophthalic acid, terephthalic acid, pyromellitic acid, etc., or a halide thereof.
- phenol compound or naphthol compound hydroquinone, resorcinol, bisphenol A, bisphenol F, bisphenol S, dihydroxydiphenyl ether, phenolphthalein, methylated bisphenol A, methylated bisphenol F, methylated bisphenol S, phenol, o-cresol, m -Cresol, p-cresol, catechol, ⁇ -naphthol, ⁇ -naphthol, 1,5-dihydroxynaphthalene, 1,6-dihydroxynaphthalene, 2,6-dihydroxynaphthalene, dihydroxybenzophenone, trihydroxybenzophenone, tetrahydroxybenzophenone, phloroglucin And benzenetriol, dicyclopentadiene-phenol addition type resins and the like.
- phthalic anhydride trimellitic anhydride, pyromellitic anhydride, maleic anhydride, tetrahydrophthalic anhydride, methyltetrahydrophthalic anhydride, methyl nadic anhydride, hexahydrophthalic anhydride, methyl hexahydrophthalic anhydride An acid etc. are mentioned.
- phenol resin phenol novolak resin, cresol novolak resin, aromatic hydrocarbon formaldehyde resin modified phenol resin, dicyclopentadiene phenol addition type resin, phenol aralkyl resin (zyloc resin), naphthol aralkyl resin, triphenylol methane resin, Tetraphenylol ethane resin, naphthol novolac resin, naphthol-phenol co-convoluted novolak resin, naphthol-cresol co-convoluted novolac resin, biphenyl-modified phenol resin (polyphenolic hydroxyl group-containing compound in which a phenol nucleus is linked with bismethylene group), naphthalene Framework-containing phenolic resin, biphenyl-modified naphthol resin (polyvalent naphthol compound in which a phenol nucleus is linked by a bismethylene group), aminotriazine Phenolic resin (polyphenolic hydroxyl group-containing compound in which
- cyanate ester resin 1 type (s) or 2 or more types can be used,
- bisphenol A type cyanate ester resin bisphenol F type cyanate ester resin, bisphenol E type cyanate ester resin, bisphenol S type cyanate ester resin, bisphenol Sulfide type cyanate ester resin, phenylene ether type cyanate ester resin, naphthylene ether type cyanate ester resin, biphenyl type cyanate ester resin, tetramethylbiphenyl type cyanate ester resin, polyhydroxynaphthalene type cyanate ester resin, phenol novolac type cyanate ester resin, Cresol novolac type cyanate ester resin, triphenylmethane type cyanate ester resin, tetraf Nylethane type cyanate ester resin, dicyclopentadiene-phenol addition reaction type cyanate ester resin, phenol aralkyl type cyanate ester resin, naphthol novo
- cyanate ester resins bisphenol A type cyanate ester resin, bisphenol F type cyanate ester resin, bisphenol E type cyanate ester resin, polyhydroxynaphthalene type cyanate ester resin in that a cured product having particularly excellent heat resistance can be obtained. It is preferable to use a naphthylene ether type cyanate ester resin and a novolac type cyanate ester resin, and a dicyclopentadiene-phenol addition reaction type cyanate ester resin is preferable in that a cured product having excellent dielectric properties can be obtained.
- the thermosetting composition of the present invention may further contain a curing accelerator (B1).
- a curing accelerator (B1) 1 type, or 2 or more types can be used, For example, a phosphorus compound, a tertiary amine, an imidazole compound, organic acid metal salt, Lewis acid, amine complex salt etc. are mentioned. .
- triphenylphosphine for a phosphorus compound and 1,8-diazabicyclo- for a tertiary amine from the viewpoint of excellent curability, heat resistance, electrical properties, humidity resistance and the like.
- DBU -Undecene
- the thermosetting composition of the present invention may further contain a maleimide compound (B2).
- the maleimide compound (B2) is different from the maleimide resin.
- the maleimide compound (B2) one or more species can be used.
- bismaleimides are preferable as the maleimide compound (B2) from the viewpoint that the heat resistance of the cured product is good, and particularly 4,4′-diphenylmethane bismaleimide, bis (3,5-dimethyl-4-maleimide) Phenyl) methane, bis (3-ethyl-5-methyl-4-maleimidophenyl) methane, bis (3,5-diethyl-4-maleimidophenyl) methane are preferred.
- the amine compound, the phenol compound, the acid anhydride compound, the imidazole compound, the organic metal salt and the like may be contained, as necessary.
- the modified resin (C) is a thermoplastic resin having at least one selected from the group consisting of a hydroxyl group and a carboxy group, and preferably has a hydroxyl group.
- the hydroxyl value of the modified resin (C) is preferably 10 mg KOH / g or more, more preferably 15 mg KOH / g or more, still more preferably 18 mg KOH / g or more, preferably 200 mg KOH / g or less, more preferably 150 mg KOH / g The following, more preferably 120 mg KOH / g or less.
- the number of at least one member (preferably hydroxyl group) selected from the group consisting of a hydroxyl group and a carboxy group contained in the modified resin (C) is preferably 2 or more, preferably 6 or less, per molecule.
- the number is more preferably 4 or less, still more preferably 3 or less, and particularly preferably 2 or less.
- the modified resin (C) is preferably at least one selected from the group consisting of a polyester resin and a polyurethane resin, and more preferably a polyester resin.
- polyester resin one or more kinds can be used.
- a polyester resin obtained by reacting a polyol and a polycarboxylic acid a polyester resin obtained by ring-opening polymerization reaction of a cyclic ester compound And polyester resins etc. obtained by copolymerizing these.
- polyol used for the production of the polyester resin one or more kinds can be used.
- ethylene glycol, propylene glycol, 1,4-butanediol, 1,6-hexanediol, diethylene glycol, neopentyl glycol Aliphatic polyols such as 1,3-butanediol; polyols having an alicyclic structure such as cyclohexanedimethanol; polyols having an aromatic structure such as bisphenol A and bisphenol F; polyols having an aromatic structure as described above; The modified polyol etc. are mentioned.
- the polyol having the alicyclic structure, the polyol having the aromatic structure, and the polyol obtained by alkylene oxide modifying the polyol having the aromatic structure are preferable, and the polyol having the aromatic structure having the alkylene oxide modified is more preferable. preferable.
- the molecular weight of the polyol is preferably 50 or more, preferably 1,500 or less, more preferably 1,000 or less, and still more preferably 700 or less.
- the number average molecular weight means a value calculated based on the hydroxyl value.
- alkylene oxides used to modify the polyol having an aromatic structure include alkylene oxides having 2 to 4 carbon atoms (preferably 2 to 3), such as ethylene oxide and propylene oxide.
- the addition mole number of the alkylene oxide is preferably 2 moles or more, more preferably 4 moles or more, preferably 20 moles or less, more preferably 16 moles or less, with respect to 1 mole of the polyol having the aromatic structure. is there.
- polycarboxylic acid one or more kinds can be used.
- aliphatic polycarboxylic acids such as succinic acid, adipic acid, sebacic acid, dodecanedicarboxylic acid, etc .
- terephthalic acid isophthalic acid, phthalic acid
- Aromatic polycarboxylic acids such as naphthalene dicarboxylic acid; their anhydrides or esters and the like.
- the content of the aliphatic polycarboxylic acid in the total of the polycarboxylic acids is preferably 5 mol% or more, more preferably 10 mol% or more, and preferably 100 mol% or less.
- the content ratio of the aromatic polycarboxylic acid and the aliphatic polycarboxylic acid is preferably 1/99 or more, more preferably 30/70 or more, still more preferably 50/50 or more, on a molar basis, preferably 99 / 1 or less, more preferably 90/10 or less, still more preferably 85/15 or less.
- the content ratio (polyol / polycarboxylic acid) of the polyol and the polycarboxylic acid used for the production of the polyester resin is preferably 20/80 or more, more preferably 30/70 or more, and even more preferably 40 on a mass basis. / 60 or more, preferably 99/1 or less, more preferably 90/10 or less, and still more preferably 85/15 or less.
- cyclic ester compound one or more kinds can be used.
- the content of the oxyalkylene unit having 4 or more carbon atoms contained in the polyester resin is preferably 10% by mass or less, more preferably 5% by mass or less, still more preferably 3% by mass or less, particularly preferably 1% by mass or less It is.
- the polyester resin can be produced, for example, by reacting the polyol and the polycarboxylic acid.
- the reaction temperature is preferably 190 ° C. or more, more preferably 200 ° C. or more, preferably 250 ° C. or less, more preferably 240 ° C. or less.
- the reaction time is preferably 1 hour or more and 100 hours or less.
- a catalyst may be coexistent.
- the catalyst may be used alone or in combination of two or more, and examples thereof include titanium-based catalysts such as tetraisopropyl titanate and tetrabutyl titanate; tin-based catalysts such as dibutyltin oxide; and organic sulfones such as p-toluenesulfonic acid An acid catalyst etc. are mentioned.
- the amount of the catalyst is preferably 0.0001 parts by mass or more, more preferably 0.0005 parts by mass or more, and preferably 0.01 parts by mass with respect to 100 parts by mass in total of the polyol and the polycarboxylic acid.
- the content is, more preferably, 0.005 parts by mass or less.
- the polyurethane resin is a reactant of a polyol and a polyisocyanate, and has a hydroxyl group at an end.
- polyether polyol As a polyol used for manufacture of the said polyurethane resin, polyether polyol, polyester polyol, a polycarbonate polyol etc. are mentioned.
- polyether polyol examples include those obtained by addition polymerization (ring-opening polymerization) of an alkylene oxide using one or two or more compounds having two or more active hydrogen atoms as an initiator.
- the initiator examples include ethylene glycol, diethylene glycol, triethylene glycol, trimethylene glycol, 1,3-propanediol, 1,4-butanediol, 1,5-pentanediol, and 1,6-hexanediol.
- Linear diols such as neopentyl glycol, 1,2-propanediol, 1,3-butanediol and the like; branched diols such as glycerin, trimethylolethane, trimethylolpropane and pyrogallol; sorbitol; Polysaccharides such as sucrose and aconit sugar; Tricarboxylic acids such as aconitic acid, trimellitic acid and hemimellitic acid; Phosphoric acid; Polyamines such as ethylenediamine and diethylenetriamine; Triisopropanolamine such as dihydroxybenzoic acid and hydroxyphthalic acid Phenol acid; and 1,2,3-propanetriol thiols.
- alkylene oxide examples include ethylene oxide, propylene oxide, butylene oxide, styrene oxide, epichlorohydrin, tetrahydrofuran and the like.
- the polyoxy tetramethylene glycol which carried out the addition polymerization (ring-opening polymerization) to the said initiator and tetrahydrofuran is preferable.
- polyester polyol for example, a polyester polyol obtained by esterification reaction of a low molecular weight polyol (for example, a polyol having a molecular weight of 50 to 300) with a polycarboxylic acid; ring-opening polymerization of cyclic ester compounds such as ⁇ -caprolactone Polyester polyols obtained by reaction; copolyester polyols thereof and the like can be mentioned.
- polyols having a molecular weight of about 50 to about 300 can be used.
- ethylene glycol, propylene glycol, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol Aliphatic polyols having 2 to 6 carbon atoms such as 3-methyl-1,5-pentanediol, diethylene glycol, dipropylene glycol, neopentyl glycol, 1,3-butanediol, etc .; 1,4-cyclohexanediol, cyclohexane Alicyclic structure-containing polyols such as dimethanol; and aromatic structure-containing polyols such as bisphenol compounds such as bisphenol A and bisphenol F and alkylene oxide adducts thereof.
- polycarboxylic acids examples include aliphatic polycarboxylic acids such as succinic acid, adipic acid, sebacic acid and dodecanedicarboxylic acid; aromatic polycarboxylic acids such as terephthalic acid, isophthalic acid, phthalic acid and naphthalenedicarboxylic acid; And ester-forming derivatives of aromatic polycarboxylic acids and aromatic polycarboxylic acids.
- polycarbonate polyol examples include a reaction product of a carbonate and a polyol; and a reaction product of phosgene and bisphenol A or the like.
- Examples of the carbonic ester include methyl carbonate, dimethyl carbonate, ethyl carbonate, diethyl carbonate, cyclocarbonate, diphenyl carbonate and the like.
- polyols examples include polyols exemplified as the above low molecular weight polyols; high molecular weight polyols (numbers such as polyether polyols (polyethylene glycol, polypropylene glycol, etc.), polyester polyols (polyhexamethylene adipate, etc.), etc. And the like.
- the number average molecular weight of the polyol used for producing the polyurethane resin is preferably 500 or more, more preferably 700 or more, preferably 3,000 or less, more preferably 2,000 or less.
- polyisocyanate 1 type, or 2 or more types can be used, For example, 4,4'- diphenylmethane diisocyanate, 2,4'- diphenylmethane diisocyanate, carbodiimide modified diphenylmethane diisocyanate, crude diphenylmethane diisocyanate, phenylene diisocyanate, triene diisocyanate
- Aromatic polyisocyanates such as naphthalene diisocyanate, xylylene diisocyanate and tetramethyl xylylene diisocyanate; aliphatic polyisocyanates such as hexamethylene diisocyanate and lysine diisocyanate; cyclohexane diisocyanate, hydrogenated xylylene diisocyanate, isophorone diisocyanate, dicyclohexylmethane diisocyanate and the like Alicyclic structure Yes polyisocyanate and the like
- the equivalent ratio [isocyanate group / hydroxyl group] of the hydroxyl group of the polyol used for the production of the urethane resin and the isocyanate group of the polyisocyanate is preferably 0.1 or more, more preferably 0.2 or more on a molar basis. Preferably it is 0.9 or less, More preferably, it is 0.7 or less.
- a polyurethane resin can be produced by reacting a polyol used for producing the polyurethane resin with a polyisocyanate.
- a chain extender having a hydroxy group may be further reacted.
- chain extender having a hydroxy group one or more species can be used.
- the solubility parameter of the modified resin (C) is preferably 9.0 (cal / cm 3 ) 0.5 or more, more preferably 9.7 (cal / cm 3 ) 0.5 or more, and preferably 10.5 (cal) / Cm 3 ) 0.5 or less, more preferably 10.3 (cal / cm 3 ) 0.5 or less.
- the difference in solubility parameter between the mixture of the thermosetting resin (A) and the thermosetting agent (B) and the modified resin (C) (the mixture-modified resin (C)) is preferably -2 (cal / Cm 3 ) 0.5 or more, more preferably -1.5 (cal / cm 3 ) 0.5 or more, still more preferably -1 (cal / cm 3 ) 0.5 or more, still more preferably 0 (cal / cm 3 ) 0.5 or more , Particularly preferably 0.2 (cal / cm 3 ) 0.5 or more, preferably 2 (cal / cm 3 ) 0.5 or less, more preferably 1.5 (cal / cm 3 ) 0.5 or less, further preferably 0.
- thermosetting resin (A) and the thermosetting resin It is 8 (cal / cm 3 ) 0.5 or less. While the difference between the solubility parameter of the mixture and the modified resin (C) is in an appropriate range, it is possible to be compatible before the heat curing, and at the same time the heat curing (that is, the heat curing resin (A) and the heat curing resin) Due to the reaction with the curing agent (B), the compatibility of the mixture (including those in the reaction process) with the modified resin (C) decreases, and after thermosetting, the thermosetting resin (A) and the thermosetting resin It is believed that it becomes possible to phase separate the reactant of the curing agent (B) and the modifying resin (C).
- the solubility parameter of the mixture is based on the method of Fedors (Polymer Engineering and Science, 1974, vol. 14, No. 2), and the solubility of each compound contained in the curable resin (A) and the thermosetting agent (B) Parameters can be calculated and determined as weighted averages based on the mass basis ratio of each compound.
- the solubility parameter of the modified resin (C) is calculated based on the Fedors method, and the solubility parameter of the unit derived from each compound used as the raw material of the modified resin (C) is calculated, and the mass of the unit derived from each compound Based on the ratio of the standard, it can be determined as a weighted average value.
- the glass transition temperature of the modified resin (C) is -100 ° C or more, preferably -80 ° C or more, more preferably -70 ° C or more, and 50 ° C or less, preferably 40 ° C or less, more Preferably it is 30 degrees C or less.
- the number average molecular weight of the modified resin (C) is 500 or more, preferably 1,000 or more, more preferably 1,500 or more, 50,000 or less, preferably 30,000 or less Preferably it is 20,000 or less, More preferably, it is 15,000 or less.
- the number average molecular weight of the modified resin (C) can be calculated based on the functional group value.
- the modified resin (C) is at least one resin selected from the group consisting of a polyester resin and a polyurethane resin, has a hydroxyl group, and has a glass transition temperature of -100 ° C.
- the temperature is preferably 50 ° C. or less, and the number average molecular weight is preferably 600 to 50,000.
- thermosetting composition is in a compatible state before the thermosetting reaction, but after the thermosetting reaction, the thermosetting resin (A) and the modifying resin (C) undergo phase separation. preferable.
- the reaction product of the thermosetting resin (A) and the thermosetting agent (B) forms a sea part
- the modifying resin (C) forms an island part, thereby forming a sea-island type It is preferable to form a phase separation structure.
- the reaction product of the thermosetting resin (A) and the thermosetting agent (B) and the modified resin (C) may form a co-continuous structure.
- thermosetting reaction By being in a compatible state before the thermosetting reaction, it is possible to uniformly disperse the modified resin (C) in the mixture of the thermosetting resin (A) and the thermosetting agent (B), while By the phase separation of the reaction product of the thermosetting resin (A) and the thermosetting agent (B) and the modifying resin (C) after the curing reaction, the chemical and mechanical properties of the modifying resin (C) itself are obtained. As it is possible to maintain, in the resulting cured product, it is possible to uniformly disperse the domains of the modifying resin (C) in the reaction product of the thermosetting resin (A) and the thermosetting agent (B) It is considered that it becomes possible to provide a cured product having both of excellent heat resistance, copper foil adhesion and toughness.
- the presence or absence of phase separation in the cured product can be confirmed by the presence or absence of the clouded portion of the cured product, and the presence of the sea portion and the island when the fracture surface of the cured product is observed with an atomic force microscope (AFM).
- AFM atomic force microscope
- the content of the modifying resin is preferably 0.1 parts by mass or more, more preferably 0.5 parts by mass or more, and still more preferably 1 part by mass or more with respect to 100 parts by mass of the thermosetting resin (A).
- it is 60 mass parts or less, More preferably, it is 45 mass parts or less. Further, it may be 35 parts by mass or less, further 15 parts by mass or less, and particularly 10 parts by mass or less.
- the thermosetting composition of the present invention may further contain an inorganic filler (D).
- an inorganic filler D
- the thermal expansion coefficient of the insulating layer can be further reduced.
- the inorganic filler one or more kinds can be used.
- silica fused silica, crystalline silica, etc.
- silicon nitride silicon nitride
- alumina alumina
- clay mineral talc, clay, etc.
- mica powder hydroxide
- aluminum, magnesium hydroxide, magnesium oxide, aluminum titanate, barium titanate, calcium titanate, titanium oxide and the like are mentioned, silica is preferable, and fused silica is more preferable.
- the shape of the silica may be either crushed or spherical, and is preferably spherical from the viewpoint of suppressing the melt viscosity of the thermosetting composition while increasing the compounding amount.
- a semiconductor sealing material preferably a power transistor, a high thermal conductivity semiconductor sealing material for power IC
- silica fused silica, crystalline silica, etc. may be mentioned, preferably crystalline silica
- Alumina and silicon nitride are preferred.
- the content of the inorganic filler in the thermosetting composition is preferably 0.2% by mass or more, more preferably 30% by mass or more, further preferably 50% by mass or more, still more preferably 70% by mass or more. Particularly preferably, it is 80% by mass or more, preferably 95% by mass or less, and more preferably 90% by mass or less.
- the content of the inorganic filler is increased, it is easy to enhance the flame retardancy, the moist heat resistance, the solder crack resistance, and lower the thermal expansion coefficient.
- the thermosetting composition of the present invention may further contain a flame retardant (E).
- a flame retardant (E) is a non-halogen system which does not contain a halogen atom substantially.
- the flame retardant (E) one or more kinds can be used.
- a phosphorus flame retardant, a nitrogen flame retardant, a silicone flame retardant, an inorganic flame retardant, an organic metal salt flame retardant, etc. can be mentioned.
- ammonium phosphates such as red phosphorus, monoammonium phosphate, diammonium phosphate, triammonium phosphate, ammonium polyphosphate
- Inorganic nitrogen-containing phosphorus compounds such as inorganic nitrogen-containing phosphorus compounds such as phosphoric acid amides
- General-purpose organic compounds such as phosphoric acid ester compounds, phosphonic acid compounds, phosphinic acid compounds, phosphine oxide compounds, phosphorane compounds, organic nitrogen-containing phosphorus compounds
- hydrotalcite magnesium hydroxide
- a boro compound zirconium oxide
- a black dye calcium carbonate
- zeolite zeolite
- zinc molybdate activated carbon and the like
- the red phosphorus is preferably subjected to a surface treatment, and as the surface treatment method, for example, (i) magnesium hydroxide, aluminum hydroxide, zinc hydroxide, titanium hydroxide, bismuth oxide, bismuth hydroxide, Method of coating with an inorganic compound such as bismuth nitrate or a mixture thereof, (ii) an inorganic compound such as magnesium hydroxide, aluminum hydroxide, zinc hydroxide or titanium hydroxide, and a mixture of a thermosetting resin such as a phenol resin (Iii) Method of double coating treatment with thermosetting resin such as phenol resin on film of inorganic compound such as magnesium hydroxide, aluminum hydroxide, zinc hydroxide, titanium hydroxide etc. Can be mentioned.
- a surface treatment method for example, (i) magnesium hydroxide, aluminum hydroxide, zinc hydroxide, titanium hydroxide, bismuth oxide, bismuth hydroxide, Method of coating with an inorganic compound such as bismuth nitrate or a mixture
- nitrogen-based flame retardant examples include triazine compounds, cyanuric acid compounds, isocyanuric acid compounds, phenothiazine compounds and the like, and triazine compounds, cyanuric acid compounds and isocyanuric acid compounds are preferable.
- a metal hydroxide a molybdenum compound, etc.
- triazine compounds examples include melamine, acetoguanamine, benzoguanamine, melon, melam, succinoguanamine, ethylenedimelamine, melamine polyphosphate, triguanamine and the like, for example (i) guanylmelamine sulfate, melem sulfate, sulfuric acid Sulfonated aminotriazine compounds such as melam, (ii) co-condensates of phenols such as phenol, cresol, xylenol, butylphenol and nonylphenol with melamines such as melamine, benzoguanamine, acetoguanamine, formumanamine and formaldehyde (iii) Mixtures of the above-mentioned co-condensates of (ii) and phenolic resins such as phenol-formaldehyde condensates, (iv) those obtained by further modifying the above-mentioned (ii) and (iii)
- cyanuric acid compound examples include cyanuric acid and melamine cyanurate.
- the compounding amount of the nitrogen-based flame retardant is appropriately selected according to the type of nitrogen-based flame retardant, the other components of the thermosetting composition, and the desired degree of flame retardancy, for example, an epoxy resin, It is preferable to blend in a range of 0.05 to 10 parts by mass in 100 parts by mass of a thermosetting composition in which all of a curing agent, non-halogen flame retardant and other fillers, additives and the like are blended, particularly 0. It is preferable to blend in the range of 1 to 5 parts by mass.
- the silicone flame retardant is not particularly limited as long as it is an organic compound containing a silicon atom, and examples thereof include silicone oil, silicone rubber and silicone resin.
- metal such as aluminum hydroxide, magnesium hydroxide, dolomite, hydrotalcite, calcium hydroxide, barium hydroxide, zirconium hydroxide and the like Hydroxide; zinc molybdate, molybdenum trioxide, zinc stannate, tin oxide, aluminum oxide, iron oxide, titanium oxide, manganese oxide, zirconium oxide, zinc oxide, molybdenum oxide, molybdenum oxide, cobalt oxide, bismuth oxide, chromium oxide, oxidized Metal oxides such as nickel, copper oxide and tungsten oxide; zinc carbonate, magnesium carbonate, calcium carbonate, barium carbonate, basic magnesium carbonate, aluminum carbonate, iron carbonate, iron carbonate, cobalt carbonate, titanium carbonate and other metal carbonate compounds; aluminum, Iron, titanium, manganese, zinc, molybdenum Metal powder such as cobalt, bismuth, chromium, nickel, copper, tungsten
- organic metal salt-based flame retardant examples include ferrocene, acetylacetonate metal complex, organic metal carbonyl compound, organic cobalt salt compound, organic sulfonic acid metal salt, metal atom and aromatic compound or heterocyclic compound, or an ionic bond or The compound etc. which carried out the coordinate bond are mentioned.
- thermosetting composition of the present invention may further contain an organic solvent (F).
- an organic solvent (F) When the thermosetting composition contains the organic solvent (F), the viscosity can be lowered, and in particular, it becomes suitable for the production of a printed circuit board.
- the organic solvent (F) one or more kinds can be used.
- ketone solvents such as acetone, methyl ethyl ketone, methyl isobutyl ketone and cyclohexanone
- ether solvents such as propylene glycol monomethyl ether; ethyl acetate, butyl acetate , Acetoyl ester solvents such as cellosolve acetate, propylene glycol monomethyl ether acetate, ethyl diglycol acetate and carbitol acetate
- Carbitol solvents such as cellosolve, methyl cellosolve and butyl carbitol
- Aromatic hydrocarbon solvents such as toluene and xylene
- Amide solvents such as formamide, dimethylacetamide, N-methylpyrrolidone and the like can be mentioned.
- thermosetting composition of the present invention when used for a printed wiring board, as the organic solvent (F), ketone solvents such as acetone, methyl ethyl ketone, methyl isobutyl ketone and cyclohexanone; ether solvents such as propylene glycol monomethyl ether Preferred are acetic acid ester solvents such as propylene glycol monomethyl ether acetate and ethyl diglycol acetate; carbitol solvents such as methyl cellosolve; and amide solvents such as dimethylformamide.
- ketone solvents such as acetone, methyl ethyl ketone, methyl isobutyl ketone and cyclohexanone
- ether solvents such as propylene glycol monomethyl ether
- acetic acid ester solvents such as propylene glycol monomethyl ether acetate and ethyl diglycol acetate
- carbitol solvents such as methyl cellosolv
- the organic solvent (F) may be a ketone solvent such as acetone, methyl ethyl ketone or cyclohexanone; ethyl acetate, butyl acetate, cellosolve acetate, propylene glycol monomethyl ether acetate Acetic acid ester solvents such as carbitol acetate; Carbitol solvents such as cellosolve and butyl carbitol; Aromatic hydrocarbon solvents such as toluene and xylene; Amide solvents such as dimethylformamide, dimethylacetamide and N-methylpyrrolidone
- the content thereof is preferably 30% by mass or more, more preferably 40% by mass or more, preferably 90% by mass or less, more preferably 80% by mass in the thermosetting composition. % Or less, more preferably 70% by mass or less.
- thermosetting composition of the present invention may further contain conductive particles.
- conductive particles By including the conductive particles, it can be used as a conductive paste and is suitable for an anisotropic conductive material.
- thermosetting composition of the present invention may further contain a rubber, a filler and the like.
- a rubber, a filler, etc. By including a rubber, a filler, etc., it becomes a thing suitable for a buildup film.
- thermosetting composition of the present invention may further contain various additives such as a silane coupling agent, a mold release agent, a pigment, an emulsifier and the like.
- thermosetting composition of this invention is obtained by mixing said each component, and can be set as hardened
- examples of the shape of the cured product include laminates, casts, adhesive layers, coatings, films and the like.
- thermosetting composition of the present invention examples include semiconductor sealing materials, printed wiring board materials, resin casting materials, adhesives, interlayer insulation materials for buildup substrates, adhesive films for buildup and the like.
- adhesive films for build-up applications so-called substrates for incorporating electronic parts in which passive parts such as capacitors and active parts such as IC chips are embedded in the board. It can be used as an insulating material.
- thermosetting resin (A), the thermosetting agent (B), the modified resin (C), and each component used as needed can be obtained by melt-mixing sufficiently using an extruder, kneader, roll, etc., as necessary, until uniform.
- thermosetting composition of the present invention When used as a semiconductor sealing material, it can be molded into a semiconductor package. Specifically, the composition can be cast or molded using a transfer molding machine, an injection molding machine, etc. Further, by heating at 50 to 200 ° C. for 2 to 10 hours, a semiconductor device which is a molded product can be obtained.
- thermosetting composition of this invention the method of impregnating a curable composition to a reinforcement base material, overlapping copper foil, and making it thermocompression-bond is mentioned.
- the reinforcing substrate include paper, glass cloth, glass nonwoven fabric, aramid paper, aramid cloth, glass mat, glass roving cloth and the like.
- a prepreg which is a cured product can be obtained by first heating the thermosetting composition (preferably 50 to 170 ° C. depending on the type of the organic solvent (F)).
- the content of the resin in the prepreg is preferably 20% by mass or more and 60% by mass or less.
- the prepregs are laminated, copper foils are stacked, and heat compression bonding is performed at 170 to 300 ° C. for 10 minutes to 3 hours under pressure of 1 to 10 MPa, to obtain a target printed circuit board.
- thermosetting composition of the present invention When the thermosetting composition of the present invention is used as a conductive paste, for example, conductive particles (fine conductive particles) are dispersed in the thermosetting composition to obtain a composition for anisotropic conductive film.
- conductive particles fine conductive particles
- the method include a method of using a paste resin composition for circuit connection which is liquid at room temperature and an anisotropic conductive adhesive.
- thermosetting composition As a method of obtaining the interlayer insulation material for a buildup substrate from the thermosetting composition of the present invention, for example, the thermosetting composition is applied to a wiring substrate on which a circuit is formed using a spray coating method, curtain coating method or the like. After curing. Thereafter, predetermined through holes and the like are drilled if necessary, and then treated with a roughening agent, and the surface is rinsed with water to form asperities, and a metal such as copper is plated.
- the plating method electroless plating and electrolytic plating are preferable, and as the roughening agent, an oxidizing agent, an alkali, an organic solvent and the like can be mentioned.
- a buildup base can be obtained by repeating such an operation sequentially as desired and alternately building up a resin insulating layer and a conductor layer of a predetermined circuit pattern. However, drilling of the through holes is performed after the formation of the outermost resin insulation layer.
- a copper foil with resin in which the thermosetting composition is semi-cured on a copper foil is thermocompression-bonded at 170 to 300 ° C. onto a wiring substrate on which a circuit is formed, thereby forming a roughened surface, plating It is also possible to produce a build-up substrate by omitting the processing step.
- the method for producing a buildup film from the thermosetting composition of the present invention is, for example, applying the thermosetting composition of the present invention on a support film to form a resin composition layer, and for a multilayer printed wiring board The method of making it a buildup film is mentioned.
- thermosetting composition of the present invention When used as a build-up film, the film is softened under the temperature conditions (generally 70 ° C. to 140 ° C.) of the lamination in vacuum lamination method, and simultaneously formed on the circuit board. It is important to exhibit fluidity (resin flow) capable of being filled with resin in existing via holes or through holes, and it is preferable to blend the above-mentioned components so as to exhibit such characteristics.
- the diameter of the through hole of the multilayer printed wiring board is usually 0.1 to 0.5 mm, the depth is usually 0.1 to 1.2 mm, and in general, it is preferable to enable resin filling in this range. In the case of laminating both sides of the circuit board, it is desirable to fill about half of the through hole.
- the method for producing the adhesive film described above is, after preparing a varnish-like thermosetting composition of the present invention, applying the varnish-like composition to the surface of a support film (Y), Furthermore, the organic solvent can be dried by heating or hot air blowing to form a layer (X) of the thermosetting composition.
- the thickness of the layer (X) to be formed is usually at least the thickness of the conductor layer. Since the thickness of the conductor layer of the circuit board is usually in the range of 5 to 70 ⁇ m, the thickness of the resin composition layer is preferably 10 to 100 ⁇ m.
- the layer (X) in this invention may be protected by the protective film mentioned later.
- a protective film By protecting with a protective film, it is possible to prevent adhesion of dust and the like to the surface of the resin composition layer and scratches.
- the support film and the protective film described above may be polyethylene, polypropylene, polyolefin such as polyvinyl chloride, polyethylene terephthalate (hereinafter sometimes abbreviated as “PET”), polyester such as polyethylene naphthalate, polycarbonate, polyimide, and the like. Examples thereof include template paper, copper foil, and metal foil such as aluminum foil.
- the support film and the protective film may be subjected to release treatment other than mud treatment and corona treatment.
- the thickness of the support film is not particularly limited, but it is usually 10 to 150 ⁇ m, preferably 25 to 50 ⁇ m.
- the thickness of the protective film is preferably 1 to 40 ⁇ m.
- the support film (Y) described above is peeled off after laminating on a circuit board or after forming an insulating layer by heat curing. If the support film (Y) is peeled off after the adhesive film is heated and cured, adhesion of dust and the like in the curing step can be prevented. In the case of peeling after curing, the support film is usually subjected to release treatment in advance.
- the method for producing a multilayer printed wiring board using the adhesive film obtained as described above for example, after layer (X) is protected by a protective film, after peeling these layers (X) Lay X) on one side or both sides of the circuit board so as to be in direct contact with the circuit board, for example, by vacuum lamination.
- the method of lamination may be batchwise or continuous in rolls.
- the adhesive film and the circuit board may be preheated if necessary before laminating.
- the lamination conditions are preferably such that the pressure bonding temperature (lamination temperature) is 70 to 140 ° C., and the pressure bonding pressure is preferably 1 to 11 kgf / cm 2 (9.8 ⁇ 10 4 to 107.9 ⁇ 10 4 N / m 2 ), and the air pressure is 20 mmHg. It is preferable to laminate under a reduced pressure of (26.7 hPa) or less.
- the method for obtaining the cured product of the present invention may be based on a general method for curing a thermosetting composition, but for example, the heating temperature conditions may be appropriately selected depending on the type and application of the curing agent to be combined However, the composition obtained by the above method may be heated in a temperature range of about 20 to 300.degree.
- Synthesis Example 1 Synthesis of Polyester Resin A
- 779.1 parts by mass of bisphenol A-type glycol ether (trademark; Hyprox MDB-561 manufactured by DIC Corporation), and isophthalic acid (hereinafter “iPA”) 132.9 parts by mass and 40.4 parts by mass of sebacic acid (hereinafter referred to as “SebA”) were charged, and temperature rise and stirring were started. Then, after raising the internal temperature to 230 ° C., 0.10 parts by mass of TiPT was charged, and reacted at 230 ° C. for 24 hours to synthesize a polyester resin.
- the obtained polyester resin had a hydroxyl value of 36.9, a number average molecular weight of 3,040, and a glass transition temperature of -14 ° C.
- Synthesis Example 2 Synthesis of Polyester Resin B Into a reaction apparatus, 395.6 parts by mass of ethylene glycol and 838.8 parts by mass of adipic acid were charged, and temperature rise and stirring were started. Next, after raising the internal temperature to 220 ° C., 0.03 parts by mass of TiPT was charged, and a condensation reaction was carried out at 220 ° C. for 24 hours to synthesize a polyester resin.
- the polyester resin thus obtained had a hydroxyl value of 56.2, a number average molecular weight of 2,000, and no glass transition temperature.
- Example 1 80 parts of an ortho cresol novolac epoxy resin (trademark; DIC Corporation, “EPICLON N-680”) as an epoxy resin in a mixing container, and a bisphenol A epoxy resin (trademark; DIC Corporation, “EPICLON 850-S” And 20 parts of novolac type phenol resin (trade name; “Phenolite TD-2131” manufactured by DIC Corporation) as a curing agent, and 30 parts of both-end OH group polyester obtained in Synthesis Example 1 It stirred until it became compatible at internal temperature 130 degreeC. One part of triphenylphosphine was added as a curing accelerator, and after stirring for 20 seconds, vacuum degassing was performed to obtain an epoxy resin composition (X1) which is a thermosetting composition of the present invention.
- an ortho cresol novolac epoxy resin trademark; DIC Corporation, “EPICLON N-680”
- a bisphenol A epoxy resin trademark; DIC Corporation, “EPICLON 850-S”
- novolac type phenol resin trade
- Example 2 and 3 In the same manner as in Example 1, except that 45 parts by mass (Example 2) and 60 parts by mass (Example 3) of the both-end OH group polyester (polyester resin A) obtained in Synthesis Example 1 were used, respectively The epoxy resin composition (X2) and (X3) which are the thermosetting composition of this invention was obtained.
- Example 4 Except using 30 parts by mass of the both-end OH group polyurethane (urethane resin A) obtained in Synthesis Example 3 instead of 30 parts by mass of the both end OH group polyester (polyester resin A) obtained in Synthesis Example 1 In the same manner as in Example 1, an epoxy resin composition (X4) which is a thermosetting composition of the present invention was obtained.
- Comparative Example 1 80 parts of an ortho cresol novolac epoxy resin (trademark; DIC Corporation, “EPICLON N-680”) as an epoxy resin in a mixing container, and a bisphenol A epoxy resin (trademark; DIC Corporation, “EPICLON 850-S” And 20 parts of novolac type phenol resin (trade name; "Phenolite TD-2131” manufactured by DIC Corporation) as a curing agent, and the mixture was stirred until the internal temperature became 130.degree. C. until the solution was compatible. After adding 1 part of triphenyl phosphine as a hardening accelerator and stirring for 20 seconds, the epoxy resin composition of the present invention was obtained by vacuum degassing (Y1).
- an ortho cresol novolac epoxy resin trademark; DIC Corporation, “EPICLON N-680”
- a bisphenol A epoxy resin trademark; DIC Corporation, “EPICLON 850-S”
- novolac type phenol resin trade name; "Phenolite TD-2131” manufactured by
- Measuring instrument Shimadzu Autograph (manufactured by Shimadzu Corporation) Model: AG-1 Test speed: 50 mm / m
- the resin composition of the present invention When the resin composition of the present invention is used as a semiconductor sealing material, microscopic fracture toughness is often required to be improved, and macroscopic fracture toughness as evaluated by the present evaluation method is not required. In some cases, the toughness improvement effect may be exhibited at a content less than the content of the modified resin (C) in the present example.
- Measuring instrument Shimadzu Autograph (manufactured by Shimadzu Corporation) Model: AG-X plus Test speed: 10 mm / min Distance between marked lines: 50 mm
- the epoxy resin compositions (X1) to (X4) of Examples 1 to 4 are the thermosetting composition of the present invention, and the obtained cured product exhibits excellent heat resistance, copper foil adhesion, and toughness. did.
- the comparative example 1 is an example which does not contain a modified resin (C), and was inferior to copper foil adhesiveness and toughness.
- the comparative example 2 is an example using resin which does not have a glass transition temperature, and was inferior to all in copper foil adhesiveness, heat resistance, and toughness.
Abstract
Description
前記改質樹脂(C)の水酸基価は、好ましくは10mgKOH/g以上、より好ましくは15mgKOH/g以上、さらに好ましくは18mgKOH/g以上であり、好ましくは200mgKOH/g以下、より好ましくは150mgKOH/g以下、さらに好ましくは120mgKOH/g以下である。
中でも、前記脂環式構造を有するポリオール、前記芳香族構造を有するポリオール及び前記芳香族構造を有するポリオールをアルキレンオキシド変性したポリオールが好ましく、前記芳香族構造を有するポリオールをアルキレンオキシド変性したポリオールがより好ましい。
本明細書において、数平均分子量は水酸基価に基づいて算出した値を意味するものとする。
中でも、脂肪族ポリカルボン酸を含むことが好ましい。前記脂肪族ポリカルボン酸の含有率は、前記ポリカルボン酸の合計中、好ましくは5モル%以上、より好ましくは10モル%以上であり、好ましくは100モル%以下である。
前記ポリカルボン酸として、脂肪族ポリカルボン酸及び芳香族ポリカルボン酸を含むことも好ましい態様である。前記芳香族ポリカルボン酸及び脂肪族ポリカルボン酸の含有量比は、モル基準で、好ましくは1/99以上、より好ましくは30/70以上、さらに好ましくは50/50以上であり、好ましくは99/1以下、より好ましくは90/10以下、さらに好ましくは85/15以下である。
前記触媒の量は、前記ポリオール及び前記ポリカルボン酸の合計100質量部に対して、好ましくは0.0001質量部以上、より好ましくは0.0005質量部以上であり、好ましくは0.01質量部以下、より好ましくは0.005質量部以下である。
前記改質樹脂(C)の数平均分子量は、前記官能基価に基づいて算出することができる。
特に、本発明の熱硬化性組成物を半導体封止材(好ましくはパワートランジスタ、パワーIC用高熱伝導半導体封止材)に用いる場合、シリカ(溶融シリカ、結晶シリカが挙げられ、好ましくは結晶シリカ)、アルミナ、窒化ケイ素が好ましい。
反応装置に、ビスフェノールA型グリコールエーテル(商標;DIC株式会社製、『ハイプロックス MDB-561』)を779.1質量部と、イソフタル酸(以下「iPA」という。)を132.9質量部と、セバシン酸(以下「SebA」という。)を40.4質量部仕込み、昇温と撹拌を開始した。
次いで、内温を230℃に上昇した後、TiPTを0.10質量部仕込み、230℃で24時間反応させポリエステル樹脂を合成した。
得られたポリエステル樹脂の水酸基価は36.9、数平均分子量は3,040、ガラス転移温度は-14℃であった。
反応装置に、エチレングリコールを395.6質量部と、アジピン酸を838.8量部仕込み、昇温と撹拌を開始した。
次いで、内温を220℃に上昇した後、TiPTを0.03質量部仕込み、220℃で24時間縮合反応させポリエステル樹脂を合成した。
得られたポリエステル樹脂の水酸基価は56.2、数平均分子量は2,000、ガラス転移温度は示さなかった。
反応装置に、ポリテトラメチレングリコール(商標;三菱化学株式会社製、『PTMG-1000』)を1000.0質量部加えて、トリレンジイソシアネート(商標;三井化学SKCポリウレタン株式会社製、『コスモネートT-80』)128.8質量部を仕込んだ。次いで、外温80℃に昇温した後、10時間反応を継続させ、ウレタン樹脂Aを合成した。
得られたウレタン樹脂の水酸基価は28.0、数平均分子量は4,010、ガラス転移温度は-22℃であった。
混合容器にエポキシ樹脂としてオルソクレゾールノボラック型エポキシ樹脂(商標;DIC株式会社製、『EPICLON N-680』)を80部、ビスフェノールA型エポキシ樹脂(商標;DIC株式会社製、『EPICLON 850-S』)を20部、硬化剤としてノボラック型フェノール樹脂(商標;DIC株式会社製、『フェノライト TD-2131』)を50部、合成例1で得られた両末端OH基ポリエステルを30部配合し、内温130℃で相溶するまで撹拌した。硬化促進剤としてトリフェニルホスフィンを1部添加し、20秒撹拌したあと、真空脱泡することで本発明の熱硬化性組成物であるエポキシ樹脂組成物(X1)を得た。
合成例1で得られた両末端OH基ポリエステル(ポリエステル樹脂A)45質量部(実施例2)、60質量部(実施例3)をそれぞれ用いたこと以外は、実施例1と同様にして、本発明の熱硬化性組成物であるエポキシ樹脂組成物(X2)、(X3)を得た。
合成例1で得られた両末端OH基ポリエステル(ポリエステル樹脂A)30質量部の代わりに、合成例3で得られた両末端OH基ポリウレタン(ウレタン樹脂A)30質量部を用いたこと以外は、実施例1と同様にして、本発明の熱硬化性組成物であるエポキシ樹脂組成物(X4)を得た。
混合容器にエポキシ樹脂としてオルソクレゾールノボラック型エポキシ樹脂(商標;DIC株式会社製、『EPICLON N-680』)を80部、ビスフェノールA型エポキシ樹脂(商標;DIC株式会社製、『EPICLON 850-S』)を20部、硬化剤としてノボラック型フェノール樹脂(商標;DIC株式会社製、『フェノライト TD-2131』)を50部配合し、内温130℃で相溶するまで撹拌した。硬化促進剤としてトリフェニルホスフィンを1部添加し、20秒撹拌したあと、真空脱泡することで本発明のエポキシ樹脂組成物を得た(Y1)。
合成例1で得られた両末端OH基ポリエステル(ポリエステル樹脂A)30質量部の代わりに、合成例2で得られた両末端OH基ポリエステル(ポリエステル樹脂B)30質量部を用いたこと以外は、実施例1と同様にして、エポキシ樹脂組成物(Y2)を得た。
実施例及び比較例で得たエポキシ樹脂組成物を130℃で、2mm厚のゴム製スペーサーを片面に銅箔を張ったガラス板で挟んだ注型板に流し込み、175℃で5時間熱硬化させた。得られた硬化物を幅10mm×長さ60mmの大きさに切り出し、剥離試験機を用いて90°ピール強度を測定した。
型式 :AG-1
試験速度 :50mm/m
実施例及び比較例で得たエポキシ樹脂組成物を130℃で2mm厚のゴム製スペーサーをガラス板で挟んだ注型板に流し込み、175℃で5時間熱硬化させた。得られた硬化物を幅5mm×長さ55mmの大きさに切り出し、下記の条件にて、貯蔵弾性率(E')及び損失弾性率(E”)を測定した。
E'/E”をtanδとした場合、tanδが最大となる温度をガラス転移温度(Tg、単位;℃)とし、測定した。
また、25℃での貯蔵弾性率(E')を測定した。
測定機器 :動的粘弾性測定機(エスアイアイ・ナノテクノロジー株式会社製)
型式 :DMA6100
測定温度範囲:0℃~300℃
昇温速度 :5℃/分
周波数 :1Hz
測定モード :曲げ
実施例及び比較例で得たエポキシ樹脂組成物を130℃で4mm厚のゴム製スペーサーをガラス板で挟んだ注型板に流し込み、175℃で5時間熱硬化させた。
得られた硬化物を幅13mm×長さ80mm×厚さ4mmの大きさに切削し試験片として、ASTM D5045-93(ISO 13586)に従い加工し、破壊靱性(単位;MPa・m0.5)の測定を行った。
試験前における試験片へのノッチ(刻み目)の作成は、剃刀の刃を試験片にあて、ハンマーで剃刀の刃に衝撃を与えることで行った。
なお本発明の樹脂組成物を半導体封止材料として用いる場合、微視的な破壊靱性の向上が求められる場合が多く、本評価方法で評価されるような巨視的な破壊靱性までは必要とされない場合があり、本実施例における改質樹脂(C)の含有量よりも少ない含有量で、靱性向上効果が発揮される場合がある。
測定機器 :島津オートグラフ(株式会社島津製作所製)
型式 :AG-X plus
試験速度 :10mm/分
標線間距離 :50mm
Claims (11)
- 熱硬化性樹脂、熱硬化剤及び改質樹脂を含む熱硬化性組成物であって、
前記改質樹脂が、水酸基及びカルボキシ基よりなる群から選ばれる少なくとも1種を有する熱可塑性樹脂であり、
前記改質樹脂のガラス転移温度が、-100℃以上50℃以下であり、
前記改質樹脂の数平均分子量が、600以上50,000以下であることを特徴とする熱硬化性組成物。 - 前記改質樹脂が、ポリエステル樹脂及びポリウレタン樹脂よりなる群から選ばれる少なくとも1種である請求項1記載の熱硬化性組成物。
- 前記改質樹脂の水酸基価が、2mgKOH/g以上350mgKOH/g以下である請求項1又は2記載の熱硬化性組成物。
- 前記改質樹脂の含有量が、前記熱硬化性樹脂100質量部に対して、0.1質量部以上60質量部以下である請求項1~3のいずれか1項記載の熱硬化性組成物。
- 前記改質樹脂の溶解度パラメータが、9.0(cal/cm3)0.5以上10.5(cal/cm3)0.5以下である請求項1~4のいずれか1項記載の熱硬化性組成物。
- エポキシ樹脂改質剤であって、
ポリエステル樹脂及びポリウレタン樹脂よりなる群から選ばれる少なくとも1種の樹脂であり、
水酸基を有するものであり、
ガラス転移温度が、-100℃以上50℃以下であり、
数平均分子量が、600以上50,000以下であることを特徴とするエポキシ樹脂改質剤。 - 請求項1~5のいずれか1項記載の熱硬化性組成物の硬化物。
- 請求項1~5のいずれか1項記載の熱硬化性組成物からなる半導体封止材料。
- 請求項1~5のいずれか1項記載の熱硬化性組成物と補強基材とを有する含浸基材の半硬化物であるプリプレグ。
- 請求項1~5のいずれか1項記載の熱硬化性組成物の板状賦形物と銅箔とを含む回路基板。
- 請求項1~5のいずれか1項記載の熱硬化性組成物の硬化物と基材フィルムとを含むビルドアップフィルム。
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