JP2008189833A - Thermosetting epoxy resin composition and semiconductor apparatus - Google Patents

Thermosetting epoxy resin composition and semiconductor apparatus Download PDF

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Publication number
JP2008189833A
JP2008189833A JP2007026659A JP2007026659A JP2008189833A JP 2008189833 A JP2008189833 A JP 2008189833A JP 2007026659 A JP2007026659 A JP 2007026659A JP 2007026659 A JP2007026659 A JP 2007026659A JP 2008189833 A JP2008189833 A JP 2008189833A
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epoxy resin
resin composition
component
thermosetting epoxy
mold release
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Takayuki Aoki
貴之 青木
Kazuharu Ikeda
多春 池田
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Shin Etsu Chemical Co Ltd
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Shin Etsu Chemical Co Ltd
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Priority to JP2007026659A priority Critical patent/JP2008189833A/en
Priority to US12/026,433 priority patent/US20080255283A1/en
Publication of JP2008189833A publication Critical patent/JP2008189833A/en
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01Means 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
    • H01L2224/42Wire connectors; Manufacturing methods related thereto
    • H01L2224/47Structure, shape, material or disposition of the wire connectors after the connecting process
    • H01L2224/48Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
    • H01L2224/4805Shape
    • H01L2224/4809Loop shape
    • H01L2224/48091Arched
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01Means 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
    • H01L2224/42Wire connectors; Manufacturing methods related thereto
    • H01L2224/47Structure, shape, material or disposition of the wire connectors after the connecting process
    • H01L2224/48Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
    • H01L2224/481Disposition
    • H01L2224/48151Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive
    • H01L2224/48221Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked
    • H01L2224/48245Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being metallic
    • H01L2224/48247Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being metallic connecting the wire to a bond pad of the item

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  • Compositions Of Macromolecular Compounds (AREA)
  • Epoxy Resins (AREA)
  • Structures Or Materials For Encapsulating Or Coating Semiconductor Devices Or Solid State Devices (AREA)
  • Photo Coupler, Interrupter, Optical-To-Optical Conversion Devices (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a thermosetting epoxy resin composition that provides a cured product keeping whiteness, heat resistance and light resistance for a long period of time and having uniformity and slight yellowing and has excellent moldability, especially mold release characteristics and to provide a semiconductor apparatus in which a semiconductor element (a light-emitting element such as an LED element, etc., is omitted and a photocoupler, in which a light-emitting element and a photodetector are integrated, is included) is sealed with the cured material of the composition. <P>SOLUTION: The thermosetting epoxy resin composition comprises (A) a reaction product obtained by reacting a triazine derivative epoxy resin with an acid anhydride in the ratio of epoxy group equivalent/acid anhydride group equivalent of 0.6-2.0, (B) an internal mold release agent, (C) a reflecting member, (D) an inorganic filler and (E) a curing catalyst as essential components. The internal mold release agent of the component (B) comprises a component that is represented by formula (1): R<SP>1</SP>CH<SB>2</SB>-CHR<SP>2</SP>-CH<SB>2</SB>R<SP>3</SP>(wherein R<SP>1</SP>, R<SP>2</SP>, R<SP>3</SP>each is any of H, -OH, -OR and -OCOC<SB>a</SB>H<SB>b</SB>and at least one of them is -OCOC<SB>a</SB>H<SB>b</SB>; R is C<SB>n</SB>H<SB>2n+1</SB>alkyl group; a is an integer of 10-30; and b is an integer of 17-61) and has a melting point of 50-90°C. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、成形性、特に離型性に優れると共に、良好な耐熱性、耐光性を有し、熱による変色、特に黄変を抑えて、信頼性に優れた硬化物を与える熱硬化性エポキシ樹脂組成物及び該組成物の硬化物で受光素子その他の半導体素子(但し、LED素子等の発光素子を除くが、発光素子と受光素子とが一体化されたフォトカプラーは包含する)を封止した半導体装置に関する。   The present invention is a thermosetting epoxy which has excellent moldability, particularly releasability, has good heat resistance and light resistance, and suppresses discoloration by heat, particularly yellowing, and gives a cured product having excellent reliability. Sealing light-receiving elements and other semiconductor elements (except for light-emitting elements such as LED elements, but including photocouplers in which light-emitting elements and light-receiving elements are integrated) with a resin composition and a cured product of the composition The present invention relates to a semiconductor device.

半導体・電子機器装置の封止材への信頼性要求は、薄型化、小型化と共に、高出力化によって、益々厳しくなっている。一例として、LEDやLD(lazer diode)等の半導体素子は、小型で効率よく鮮やかな色の発光をし、また半導体素子であるため球切れがなく、駆動特性が優れ、振動やON/OFF点灯の繰り返しに強い。そのため、各種インジケータや種々の光源として利用されている。
このような半導体素子を用いたフォトカプラー等の半導体・電子機器装置の材料のひとつとして、ポリフタルアミド樹脂(PPA)が現在広く使用されている。
The reliability requirements for the sealing materials of semiconductor / electronic device devices are becoming more and more severe due to the increase in output as well as the reduction in thickness and size. As an example, semiconductor elements such as LEDs and LDs (laser diodes) emit light with a small, efficient and vivid color, and since they are semiconductor elements, they have no ball breakage, excellent driving characteristics, vibration and ON / OFF lighting. Strong in repetition. Therefore, it is used as various indicators and various light sources.
Currently, polyphthalamide resin (PPA) is widely used as one of materials for semiconductor and electronic equipment devices such as photocouplers using such semiconductor elements.

しかしながら、今日の光半導体技術の飛躍的な進歩により、光半導体装置の高出力化及び短波長化が著しく、高エネルギー光を発光又は受光可能なフォトカプラー等の光半導体装置では、特に無着色・白色の材料として従来のPPA樹脂を用いた半導体素子封止及びケースでは、長期間使用による劣化が著しく、色ムラの発生や剥離、機械的強度の低下等が起こりやすく、このため、このような問題を効果的に解決することが望まれた。   However, due to the dramatic progress of today's optical semiconductor technology, the output power and the wavelength of optical semiconductor devices have been remarkably reduced. Especially in optical semiconductor devices such as photocouplers that can emit or receive high energy light, In a semiconductor element sealing and case using a conventional PPA resin as a white material, deterioration due to long-term use is remarkable, and color unevenness and peeling, and mechanical strength are liable to occur. It was desired to solve the problem effectively.

更に詳述すると、特許第2656336号公報(特許文献1)には、封止樹脂が、エポキシ樹脂、硬化剤及び硬化促進剤を構成成分とするBステージ状の光半導体封止用エポキシ樹脂組成物であって、上記構成成分が分子レベルで均一に混合されている樹脂組成物の硬化体で構成されていることを特徴とする光半導体装置が記載されている。この場合、エポキシ樹脂としては、ビスフェノールA型エポキシ樹脂又はビスフェノールF型エポキシ樹脂が主として用いられ、トリグリシジルイソシアネート等を使用し得ることも記載されているが、トリグリシジルイソシアネートは、実施例においてビスフェノール型エポキシ樹脂に少量添加使用されているもので、本発明者らの検討によれば、このBステージ状半導体封止用エポキシ樹脂組成物は、特に高温・長時間の放置で黄変するという問題がある。
また、発光素子封止用エポキシ樹脂組成物におけるトリアジン誘導体エポキシ樹脂の使用については、特開2000−196151号公報(特許文献2)、特開2003−224305号公報(特許文献3)、特開2005−306952号公報(特許文献4)に記載があるが、これらは、いずれもトリアジン誘導体エポキシ樹脂と酸無水物とを用いてBステージ化したものではない。
More specifically, in Japanese Patent No. 2656336 (Patent Document 1), a B-stage epoxy resin composition for encapsulating an optical semiconductor, in which the sealing resin comprises an epoxy resin, a curing agent and a curing accelerator as constituent components. An optical semiconductor device characterized in that it is composed of a cured body of a resin composition in which the constituent components are uniformly mixed at the molecular level is described. In this case, as the epoxy resin, bisphenol A type epoxy resin or bisphenol F type epoxy resin is mainly used, and it is also described that triglycidyl isocyanate or the like can be used, but triglycidyl isocyanate is a bisphenol type in Examples. A small amount is added to the epoxy resin, and according to the study by the present inventors, this epoxy resin composition for B-stage semiconductor encapsulation has a problem that it turns yellow particularly when left at high temperature for a long time. is there.
Moreover, about use of the triazine derivative epoxy resin in the epoxy resin composition for light emitting element sealing, Unexamined-Japanese-Patent No. 2000-196151 (patent document 2), Unexamined-Japanese-Patent No. 2003-224305 (patent document 3), and Unexamined-Japanese-Patent No. 2005. Although described in Japanese Patent No. 306952 (Patent Document 4), none of these is B-staged using a triazine derivative epoxy resin and an acid anhydride.

なお、本発明に関連する公知文献としては、上記の公報に加えて、下記特許文献5〜7及び非特許文献1が挙げられる。
特許第2656336号公報 特開2000−196151号公報 特開2003−224305号公報 特開2005−306952号公報 特許第3512732号公報 特開2001−234032号公報 特開2002−302533号公報 エレクトロニクス実装技術2004.4の特集
In addition, as well-known literature relevant to this invention, in addition to said gazette, the following patent documents 5-7 and nonpatent literature 1 are mentioned.
Japanese Patent No. 2656336 JP 2000-196151 A JP 2003-224305 A JP 2005-306952 A Japanese Patent No. 3512732 JP 2001-234032 A JP 2002-302533 A Special Issue on Electronics Packaging Technology 2004.4

本発明は、上記事情に鑑みなされたもので、長期間にわたり白色性、耐熱性、耐光性を保持し、均一でかつ黄変の少ない硬化物を与え、かつ、成形性、特に離型性に優れた熱硬化性エポキシ樹脂組成物及び該組成物の硬化物で半導体素子(但し、LED素子等の発光素子を除くが、発光素子と受光素子とが一体化されたフォトカプラーは包含する)が封止された半導体装置を提供することを目的とする。   The present invention has been made in view of the above circumstances, and retains whiteness, heat resistance, and light resistance over a long period of time, gives a cured product that is uniform and has little yellowing, and has moldability, particularly releasability. An excellent thermosetting epoxy resin composition and a cured product of the composition have a semiconductor element (except for a light emitting element such as an LED element, but including a photocoupler in which a light emitting element and a light receiving element are integrated). It is an object to provide a sealed semiconductor device.

本発明者らは、上記目的を達成すべく鋭意検討を行った結果、
(A)トリアジン誘導体エポキシ樹脂と酸無水物とをエポキシ基当量/酸無水物基当量0.6〜2.0の割合で反応させて得られる反応物、
(B)内部離型剤、
(C)反射部材、
(D)無機充填剤、
(E)硬化触媒
を必須成分とするエポキシ樹脂組成物であって、(B)成分の内部離型剤が、下記一般式(1)

(式中、R1,R2,R3はH,−OH,−OR,−OCOCabのいずれかであり、少なくともひとつは−OCOCabを含む。RはCn2n+1のアルキル基(nは1〜30の整数である)、aは10〜30の整数、bは17〜61の整数である。)
で示され、融点が50〜90℃の範囲である成分を含有する熱硬化性エポキシ樹脂組成物が、良好な離型性を有し、連続成形性に優れると共に、耐熱性、耐光性が良好な硬化物となり得ることを見出し、本発明をなすに至った。
As a result of intensive studies to achieve the above object, the present inventors,
(A) a reaction product obtained by reacting a triazine derivative epoxy resin and an acid anhydride at a ratio of epoxy group equivalent / acid anhydride group equivalent of 0.6 to 2.0,
(B) an internal release agent,
(C) a reflective member,
(D) inorganic filler,
(E) An epoxy resin composition containing a curing catalyst as an essential component, wherein the internal mold release agent of component (B) is represented by the following general formula (1)

(Wherein R 1 , R 2 and R 3 are any one of H, —OH, —OR, and —OCOC a H b , and at least one includes —OCOC a H b . R represents C n H 2n + 1 is an alkyl group (n is an integer of 1 to 30), a is an integer of 10 to 30, and b is an integer of 17 to 61.)
The thermosetting epoxy resin composition containing a component having a melting point in the range of 50 to 90 ° C. has good releasability, excellent continuous moldability, and good heat resistance and light resistance. The present invention has been found out that it can be a cured product.

従って、本発明は、下記に示す熱硬化性エポキシ樹脂組成物並びに半導体装置を提供する。
[I](A)トリアジン誘導体エポキシ樹脂と酸無水物とをエポキシ基当量/酸無水物基当量0.6〜2.0の割合で反応させて得られる反応物、
(B)内部離型剤、
(C)反射部材、
(D)無機充填剤、
(E)硬化触媒
を必須成分とするエポキシ樹脂組成物であって、(B)成分の内部離型剤が、下記一般式(1)

(式中、R1,R2,R3はH,−OH,−OR,−OCOCabのいずれかであり、少なくともひとつは−OCOCabを含む。RはCn2n+1のアルキル基(nは1〜30の整数である)、aは10〜30の整数、bは17〜61の整数である。)
で示され、融点が50〜90℃の範囲である成分を含有してなることを特徴とする熱硬化性エポキシ樹脂組成物。
[II]更に、(F)酸化防止剤を含有する[I]記載の熱硬化性エポキシ樹脂組成物。
[III](A)成分のトリアジン誘導体エポキシ樹脂が、1,3,5−トリアジン核誘導体エポキシ樹脂である[I]又は[II]記載の熱硬化性エポキシ樹脂組成物。
[IV]上記(A)成分の固形物が、下記一般式(2)

(式中、R4は酸無水物残基、mは0〜200の数である。)
で示される化合物を含有するものである[III]記載の熱硬化性エポキシ樹脂組成物。
[V]内部離型剤が、融点50〜70℃であるグリセリンモノステアレートを含むものであり、全組成物に対して0.2〜5.0質量%含有することを特徴とする[I]〜[IV]のいずれかに記載の熱硬化性エポキシ樹脂組成物。
[VI]内部離型剤が、プロピレングリコール脂肪酸エステルを含むものであり、全組成物に対して0.2〜5.0質量%含有することを特徴とする[I]〜[IV]のいずれかに記載の熱硬化性エポキシ樹脂組成物。
[VII]発光素子を除く半導体素子ケース形成用である[I]〜[VI]のいずれかに記載の熱硬化性エポキシ樹脂組成物。
[VIII][I]〜[VI]のいずれかに記載の熱硬化性エポキシ樹脂組成物の硬化物で半導体素子(但し、発光素子を除くが、発光素子と受光素子とが一体化した素子は包含する)を封止した半導体装置。
Accordingly, the present invention provides the following thermosetting epoxy resin composition and semiconductor device.
[I] (A) a reaction product obtained by reacting a triazine derivative epoxy resin and an acid anhydride at a ratio of epoxy group equivalent / acid anhydride group equivalent of 0.6 to 2.0;
(B) an internal release agent,
(C) a reflective member,
(D) inorganic filler,
(E) An epoxy resin composition containing a curing catalyst as an essential component, wherein the internal mold release agent of component (B) is represented by the following general formula (1)

(Wherein R 1 , R 2 and R 3 are any one of H, —OH, —OR, and —OCOC a H b , and at least one includes —OCOC a H b . R represents C n H 2n + 1 is an alkyl group (n is an integer of 1 to 30), a is an integer of 10 to 30, and b is an integer of 17 to 61.)
A thermosetting epoxy resin composition comprising a component having a melting point in the range of 50 to 90 ° C.
[II] The thermosetting epoxy resin composition according to [I], further comprising (F) an antioxidant.
[III] The thermosetting epoxy resin composition according to [I] or [II], wherein the triazine derivative epoxy resin of component (A) is a 1,3,5-triazine nucleus derivative epoxy resin.
[IV] The solid of the component (A) is represented by the following general formula (2)

(In the formula, R 4 is an acid anhydride residue, and m is a number from 0 to 200.)
The thermosetting epoxy resin composition of [III] description containing the compound shown by these.
[V] The internal mold release agent contains glycerin monostearate having a melting point of 50 to 70 ° C., and is contained in an amount of 0.2 to 5.0% by mass based on the total composition [I] ] The thermosetting epoxy resin composition in any one of [IV].
[VI] Any of [I] to [IV], wherein the internal mold release agent contains propylene glycol fatty acid ester and is contained in an amount of 0.2 to 5.0% by mass based on the total composition. The thermosetting epoxy resin composition according to claim 1.
[VII] The thermosetting epoxy resin composition according to any one of [I] to [VI], which is for forming a semiconductor element case excluding a light emitting element.
[VIII] A cured product of the thermosetting epoxy resin composition according to any one of [I] to [VI], which is a semiconductor element (excluding a light emitting element, but an element in which a light emitting element and a light receiving element are integrated) Including a semiconductor device).

本発明の熱硬化性エポキシ樹脂組成物は、成形性、特に離型性に優れると共に、長期間にわたり耐熱性、耐光性を保持し、均一でかつ黄変の少ない硬化物を与えるものである。そのため、本発明の組成物の硬化物にて封止されたフォトカプラー等の受光素子を有する半導体・電子機器装置は、産業上特に有用である。   The thermosetting epoxy resin composition of the present invention is excellent in moldability, in particular, releasability, retains heat resistance and light resistance for a long period of time, and gives a cured product that is uniform and has little yellowing. Therefore, a semiconductor / electronic device having a light receiving element such as a photocoupler sealed with a cured product of the composition of the present invention is particularly useful in industry.

(A)反応物
本発明に係る熱硬化性エポキシ樹脂組成物は、トリアジン誘導体エポキシ樹脂と酸無水物とを、エポキシ基当量/酸無水物基当量を0.6〜2.0の割合で反応させて得られた反応物を樹脂成分として使用する。
(A) Reactant The thermosetting epoxy resin composition according to the present invention reacts a triazine derivative epoxy resin with an acid anhydride at an epoxy group equivalent / acid anhydride group equivalent ratio of 0.6 to 2.0. The reaction product obtained is used as a resin component.

(A−1)トリアジン誘導体エポキシ樹脂
本発明で用いられる(A−1)成分のトリアジン誘導体エポキシ樹脂は、これを酸無水物と特定の割合で反応させて得られる反応物を樹脂成分として含有することにより、熱硬化性エポキシ樹脂組成物の硬化物の黄変を抑制し、かつ経時劣化の少ない半導体発光装置を実現する。かかるトリアジン誘導体エポキシ樹脂としては、1,3,5−トリアジン核誘導体エポキシ樹脂であることが好ましい。特にイソシアヌレート環を有するエポキシ樹脂は、耐光性や電気絶縁性に優れており、1つのイソシアヌレート環に対して、2価の、より好ましくは3価のエポキシ基を有することが望ましい。具体的には、トリス(2,3−エポキシプロピル)イソシアヌレート、トリス(α−メチルグリシジル)イソシアヌレート、トリス(α−メチルグリシジル)イソシアヌレート等を用いることができる。
(A-1) Triazine derivative epoxy resin The triazine derivative epoxy resin of component (A-1) used in the present invention contains, as a resin component, a reaction product obtained by reacting this with an acid anhydride at a specific ratio. Accordingly, a semiconductor light emitting device that suppresses yellowing of the cured product of the thermosetting epoxy resin composition and has little deterioration with time is realized. The triazine derivative epoxy resin is preferably a 1,3,5-triazine nucleus derivative epoxy resin. In particular, an epoxy resin having an isocyanurate ring is excellent in light resistance and electrical insulation, and desirably has a divalent, more preferably a trivalent epoxy group per one isocyanurate ring. Specifically, tris (2,3-epoxypropyl) isocyanurate, tris (α-methylglycidyl) isocyanurate, tris (α-methylglycidyl) isocyanurate, or the like can be used.

本発明で用いるトリアジン誘導体エポキシ樹脂の軟化点は90〜125℃であることが好ましい。なお、本発明において、このトリアジン誘導体エポキシ樹脂としては、トリアジン環を水素化したものは包含しない。   The softening point of the triazine derivative epoxy resin used in the present invention is preferably 90 to 125 ° C. In the present invention, the triazine derivative epoxy resin does not include a hydrogenated triazine ring.

(A−2)酸無水物
本発明で用いられる(A−2)成分の酸無水物は、硬化剤として作用するものであり、耐光性を与えるために非芳香族であり、かつ炭素炭素二重結合を有さないものが好ましく、例えば、ヘキサヒドロ無水フタル酸、メチルヘキサヒドロ無水フタル酸、トリアルキルテトラヒドロ無水フタル酸、水素化メチルナジック酸無水物などが挙げられ、これらの中でもメチルヘキサヒドロ無水フタル酸が好ましい。これらの酸無水物系硬化剤は、1種を単独で使用してもよく、また2種以上を併用してもよい。
(A-2) Acid anhydride The acid anhydride of component (A-2) used in the present invention acts as a curing agent, is non-aromatic to give light resistance, and is carbon Those having no double bond are preferred, for example, hexahydrophthalic anhydride, methylhexahydrophthalic anhydride, trialkyltetrahydrophthalic anhydride, hydrogenated methylnadic anhydride, and the like. Phthalic acid is preferred. These acid anhydride curing agents may be used alone or in combination of two or more.

酸無水物系硬化剤の配合量としては、上記した酸無水物基1当量に対しトリアジン誘導体エポキシ樹脂のエポキシ基が0.6〜2.0当量、好ましくは1.0〜2.0当量、更に好ましくは1.2〜1.6当量となる量である。エポキシ基当量/酸無水物基当量が0.6当量未満では硬化不良が生じ、信頼性が低下する場合がある。また、2.0当量を超える量では未反応硬化剤が硬化物中に残り、得られる硬化物の耐湿性を悪化させる場合がある。   As a compounding quantity of an acid anhydride type hardening | curing agent, the epoxy group of a triazine derivative epoxy resin is 0.6-2.0 equivalent with respect to 1 equivalent of above-mentioned acid anhydride groups, Preferably it is 1.0-2.0 equivalent, More preferably, the amount is 1.2 to 1.6 equivalents. If the epoxy group equivalent / acid anhydride group equivalent is less than 0.6 equivalent, curing failure may occur and reliability may be lowered. On the other hand, if the amount exceeds 2.0 equivalents, the unreacted curing agent may remain in the cured product, which may deteriorate the moisture resistance of the resulting cured product.

本発明においては、上記した(A−1),(A−2)成分、又は(A−1),(A−2)成分と後述する酸化防止剤を、予め70〜120℃、好ましくは80〜110℃にて4〜20時間、好ましくは6〜15時間、又は(A−1),(A−2)と後述する硬化触媒、又は(A−1),(A−2)とそれぞれ後述する酸化防止剤,硬化触媒を、予め30〜80℃、好ましくは40〜60℃にて10〜72時間、好ましくは36〜60時間反応させ、軟化点が50〜100℃、好ましくは60〜90℃である固形物とし、これを粉砕して配合することが好ましい。反応させて得られる物質の軟化点が、50℃未満では固形物とはならず、100℃を超える温度では流動性が低下するおそれがある。この場合、反応時間が短すぎると、高分子成分が少なくて固形物とならず、長すぎると、流動性が低下する場合が生じる。なお、本発明において、軟化点は、JIS環球法値による測定法に基づく測定値である。   In the present invention, the above-described components (A-1) and (A-2), or the components (A-1) and (A-2) and the antioxidant described later are preliminarily set at 70 to 120 ° C., preferably 80. ˜110 ° C. for 4 to 20 hours, preferably 6 to 15 hours, or (A-1), (A-2) and a curing catalyst described later, or (A-1), (A-2) and each described later. The antioxidant and the curing catalyst are reacted in advance at 30 to 80 ° C., preferably 40 to 60 ° C. for 10 to 72 hours, preferably 36 to 60 hours, and the softening point is 50 to 100 ° C., preferably 60 to 90. It is preferable to form a solid material having a temperature of 0 ° C. and pulverize and mix it. If the softening point of the substance obtained by the reaction is less than 50 ° C., it does not become a solid, and if it exceeds 100 ° C., the fluidity may decrease. In this case, if the reaction time is too short, the polymer component is small and does not become a solid, and if it is too long, the fluidity may decrease. In addition, in this invention, a softening point is a measured value based on the measuring method by a JIS ring ball method value.

ここで得られた反応物(反応固形物)は、(A−1)成分のトリアジン誘導体エポキシ樹脂と(A−2)成分の酸無水物との反応物のうち、ゲルパーミエーションクロマトグラフィー(GPC)による分析において(但し、分析条件として試料濃度0.2%、注入量50μlを移動相THF100%,流量1.0ml/min.、温度40℃の条件下、検出器RIで測定)、分子量が1,500を超える高分子量成分と、分子量300〜1,500までの中分子量成分と、モノマー成分とを含有し、高分子量成分が20〜70質量%、中分子量成分が10〜60質量%、モノマー成分が10〜40質量%であることが好ましい。   The reaction product (reaction solid material) obtained here was gel permeation chromatography (GPC) among the reaction products of the triazine derivative epoxy resin of component (A-1) and the acid anhydride of component (A-2). ) (However, as the analysis conditions, the sample concentration is 0.2%, the injection amount is 50 μl, the mobile phase THF is 100%, the flow rate is 1.0 ml / min., The temperature is 40 ° C., and the detector is RI). A high molecular weight component exceeding 1,500, a medium molecular weight component having a molecular weight of 300 to 1,500, and a monomer component, the high molecular weight component being 20 to 70% by mass, the medium molecular weight component being 10 to 60% by mass, The monomer component is preferably 10 to 40% by mass.

上記反応物は、(A−1)成分としてトリグリシジルイソシアネートを用いた場合、下記式(2)で示される反応生成物を含有し、特に(A−2)成分の酸無水物がメチルヘキサヒドロ無水フタル酸である場合、下記式(3)で示される反応生成物を含有する。   When triglycidyl isocyanate is used as the component (A-1), the reaction product contains a reaction product represented by the following formula (2). In particular, the acid anhydride of the component (A-2) is methylhexahydro In the case of phthalic anhydride, it contains a reaction product represented by the following formula (3).

上記式中、R4は酸無水物残基、mが0〜200、好ましくは0〜100の範囲の任意のものを含み、平均分子量が500〜10万の成分であるが、本発明に係る反応物にあっては、上述したように、分子量が300〜1,500の中分子量成分を10〜60質量%、特に10〜40質量%、モノマー成分(未反応エポキシ樹脂及び酸無水物)を10〜40質量%、特に15〜30質量%含有することが好ましい。 In the above formula, R 4 is an acid anhydride residue, m is any component in the range of 0 to 200, preferably 0 to 100, and is an ingredient having an average molecular weight of 500 to 100,000. In the reaction product, as described above, the medium molecular weight component having a molecular weight of 300 to 1,500 is 10 to 60% by mass, particularly 10 to 40% by mass, and monomer components (unreacted epoxy resin and acid anhydride). It is preferable to contain 10-40 mass%, especially 15-30 mass%.

(B)内部離型剤
本発明のエポキシ樹脂組成物には、内部離型剤を配合する。(B)成分の内部離型剤は、成形時の離型性を高めるために配合するものであり、下記一般式(1)

(式中、R1,R2,R3はH,−OH,−OR,−OCOCabのいずれかであり、少なくともひとつは−OCOCabを含む。RはCn2n+1のアルキル基(nは1〜30の整数である)、aは10〜30の整数、bは17〜61の整数である。)
で示され、かつ融点が50〜70℃の範囲である成分を含む。この場合、(B)成分は、全組成物に対して0.2〜5.0質量%含有するように添加するものである。内部離型剤としては、カルナバワックスをはじめとする天然ワックス、酸ワックス、ポリエチレンワックス、脂肪酸エステルをはじめとする合成ワックスがあるが、一般的に高温条件下や光照射下では、容易に黄変したり、経時劣化し、離型性を有しなくなるものが多い。
その中で、本発明に係る上記式(1)の内部離型剤は、高温放置下や光照射下においても、黄変性を抑え、かつ長時間に亘り、良好な離型性を継続して保持する。
(B) Internal mold release agent An internal mold release agent is mix | blended with the epoxy resin composition of this invention. The internal mold release agent of component (B) is blended in order to improve the mold release property at the time of molding, and the following general formula (1)

(Wherein R 1 , R 2 and R 3 are any one of H, —OH, —OR, and —OCOC a H b , and at least one includes —OCOC a H b . R represents C n H 2n + 1 is an alkyl group (n is an integer of 1 to 30), a is an integer of 10 to 30, and b is an integer of 17 to 61.)
And a component having a melting point in the range of 50 to 70 ° C. In this case, (B) component is added so that it may contain 0.2-5.0 mass% with respect to all the compositions. Internal mold release agents include natural waxes such as carnauba wax, acid waxes, polyethylene waxes, and synthetic waxes such as fatty acid esters. Generally, yellowing easily occurs under high temperature conditions or under light irradiation. Or deteriorates with time and no longer has releasability.
Among them, the internal mold release agent of the above formula (1) according to the present invention suppresses yellowing even when left at high temperature or under light irradiation, and continues good mold release properties for a long time. Hold.

この場合、一般式(1)中のR1,R2,R3のうち、少なくともひとつは−OCOCabであることが必須である。すべてが−OHでは、十分な離型性、耐熱性が得られないが、構造内に−OCOCabを含むことにより、良好な相溶性と耐熱性、離型性を有することができる。
−OCOCabに含まれるa及びbは、a=10〜30、好ましくはa=11〜20ののものが好適である。a=10未満では、十分な耐熱黄変性が得られない場合があり、a=30を超えると十分に相溶せず、良好な離型効果が得られない場合がある。
また、bはCabが飽和あるいは不飽和の脂肪族炭化水素基であり、不飽和の場合、不飽和基を1又は2個有するものが好ましく、従ってb=2a+1、2a−1又は2a−3であるもの、特にb=2a+1、2a−1であるものが好ましい。この点からb=17〜61、好ましくは19〜41の整数であることがよく、より好ましくはb=21〜61、特に23〜41の整数である。
In this case, it is essential that at least one of R 1 , R 2 and R 3 in the general formula (1) is —OCOC a H b . When all of them are —OH, sufficient releasability and heat resistance cannot be obtained, but by including —OCOC a H b in the structure, good compatibility, heat resistance and releasability can be obtained.
The a and b contained in —OCOC a H b are preferably a = 10-30, preferably a = 11-20. If it is less than a = 10, sufficient heat-resistant yellowing may not be obtained, and if a = 30, it may not be sufficiently compatible and a good mold release effect may not be obtained.
Further, b is an aliphatic hydrocarbon group in which C a H b is saturated or unsaturated, and when it is unsaturated, it preferably has 1 or 2 unsaturated groups, and therefore b = 2a + 1, 2a-1 or 2a -3, in particular, b = 2a + 1, 2a-1. From this point, b is preferably an integer of 17 to 61, preferably 19 to 41, more preferably b is 21 to 61, and particularly an integer of 23 to 41.

具体的には、グリセリンモノパルミテート、グリセリンモノステアレート、グリセリンモノ12−ヒドロキシステアレート、グリセリントリ12−ヒドロキシステアレート、グリセリンモノベヘネート、プロピレングリコールモノパルミテート、プロピレングリコールモノステアレート、プロピレングリコールモノベヘネート等が挙げられる。
但し、融点、高温での揮発分も耐熱性特性には重要な特性であり、融点は50〜90℃、好ましくは65〜85℃が好ましい。更には、250℃での揮発分が10質量%以下のものが好ましい。融点が、50℃未満では十分な耐熱黄変性が得られない場合があり、90℃を超えると相溶性が不十分になり、良好な離型効果が得られない場合がある。特に分散性、相溶性の面から融点50〜70℃のグリセリンモノステアレートが好ましい。また、プロピレングリコール脂肪酸エステルも好ましい。
Specifically, glycerol monopalmitate, glycerol monostearate, glycerol mono12-hydroxystearate, glycerol tri12-hydroxystearate, glycerol monobehenate, propylene glycol monopalmitate, propylene glycol monostearate, propylene glycol Monobehenate etc. are mentioned.
However, the melting point and volatile content at high temperature are also important characteristics for heat resistance, and the melting point is preferably 50 to 90 ° C, and preferably 65 to 85 ° C. Furthermore, the thing whose volatile matter in 250 degreeC is 10 mass% or less is preferable. When the melting point is less than 50 ° C., sufficient heat-resistant yellowing may not be obtained, and when it exceeds 90 ° C., the compatibility becomes insufficient and a good release effect may not be obtained. In particular, glycerin monostearate having a melting point of 50 to 70 ° C. is preferable from the viewpoint of dispersibility and compatibility. Also preferred are propylene glycol fatty acid esters.

なお、上記式(1)の離型剤は、全内部離型剤(B)中20〜100質量%、特に50〜100質量%含有することが好ましい。この場合、残りの離型剤は、上述した天然ワックス、酸ワックス、他の合成ワックス等である。   In addition, it is preferable that the mold release agent of said Formula (1) contains 20-100 mass% in all the internal mold release agents (B), especially 50-100 mass%. In this case, the remaining mold release agent is the above-described natural wax, acid wax, other synthetic wax, or the like.

該内部離型剤(B)の添加量は、組成物全体の0.2〜5.0質量%、特には0.5〜3.0質量%が好ましい。添加量が0.2質量%未満では、十分な離型性を得られない場合があり、5.0質量%を超えると、沁み出し不良や接着性不良等が起こる場合がある。   The amount of the internal mold release agent (B) added is preferably 0.2 to 5.0% by mass, particularly 0.5 to 3.0% by mass, based on the entire composition. When the addition amount is less than 0.2% by mass, sufficient releasability may not be obtained. When the addition amount exceeds 5.0% by mass, a squeeze-out defect or adhesion failure may occur.

(C)反射部材
本発明のエポキシ樹脂組成物には、反射部材を配合する。(C)成分の反射部材は、白色着色剤として、白色度を高めるために配合するものであり、反射部材としては二酸化チタンを用いることが好ましく、この二酸化チタンの単位格子はルチル型、アナタース型、ブルカイト型のどれでも構わない。また、平均粒径や形状も限定されないが、平均粒径は通常0.05〜5.0μmである。上記二酸化チタンは、樹脂や無機充填剤との相溶性、分散性を高めるため、AlやSiなどの含水酸化物等で予め表面処理することができる。また、反射部材(白色着色剤)として、二酸化チタン以外にチタン酸カリウム、酸化ジルコン、硫化亜鉛、酸化亜鉛、酸化マグネシウム等を単独で又は二酸化チタンと併用して使用することもできる。
(C) Reflective member A reflective member is mix | blended with the epoxy resin composition of this invention. The (C) component reflecting member is blended as a white colorant to increase whiteness, and it is preferable to use titanium dioxide as the reflecting member. The unit cell of this titanium dioxide is a rutile type, anatase type. Any of the bulkyite types can be used. Moreover, although an average particle diameter and a shape are not limited, an average particle diameter is 0.05-5.0 micrometers normally. The titanium dioxide can be surface-treated in advance with a hydrous oxide such as Al or Si in order to enhance the compatibility and dispersibility with a resin or an inorganic filler. In addition to titanium dioxide, potassium titanate, zircon oxide, zinc sulfide, zinc oxide, magnesium oxide and the like can be used alone or in combination with titanium dioxide as the reflecting member (white colorant).

反射部材の充填量は、組成物全体の2〜80質量%、特に5〜50質量%が好ましい。2質量%未満では十分な白色度が得られない場合があり、80質量%を超えると未充填やボイド等の成形性が低下する場合がある。   The filling amount of the reflecting member is preferably 2 to 80% by mass, particularly 5 to 50% by mass, based on the entire composition. If it is less than 2% by mass, sufficient whiteness may not be obtained. If it exceeds 80% by mass, moldability such as unfilling and voids may be deteriorated.

(D)無機充填剤
本発明のエポキシ樹脂組成物には、更に無機充填剤を配合する。配合される(D)成分の無機充填剤としては、通常エポキシ樹脂組成物に配合されるものを使用することができる。例えば、溶融シリカ、結晶性シリカ等のシリカ類、アルミナ、窒化珪素、窒化アルミニウム、ボロンナイトライド、ガラス繊維、三酸化アンチモン等が挙げられるが、上記した反射部材(白色着色剤)は除かれる。
(D) Inorganic filler An inorganic filler is further mix | blended with the epoxy resin composition of this invention. What is normally mix | blended with an epoxy resin composition can be used as an inorganic filler of the (D) component mix | blended. Examples thereof include silicas such as fused silica and crystalline silica, alumina, silicon nitride, aluminum nitride, boron nitride, glass fiber, antimony trioxide, etc., but the above-described reflecting member (white colorant) is excluded.

これら無機充填剤の平均粒径や形状は特に限定されないが、平均粒径は通常5〜40μmである。
なお、平均粒径は、レーザー光回折法による粒度分布測定における質量平均値D50(又はメジアン径)として求めることができる。
Although the average particle diameter and shape of these inorganic fillers are not particularly limited, the average particle diameter is usually 5 to 40 μm.
The average particle size can be determined as a mass average value D 50 in the particle size distribution measurement by laser diffraction method (or median diameter).

上記無機充填剤は、樹脂と無機充填剤との結合強度を強くするため、シランカップリング剤、チタネートカップリング剤などのカップリング剤で予め表面処理したものを配合してもよい。
このようなカップリング剤としては、例えば、γ−グリシドキシプロピルトリメトキシシラン、γ−グリシドキシプロピルメチルジエトキシシラン、β−(3,4−エポキシシクロヘキシル)エチルトリメトキシシラン等のエポキシ官能性アルコキシシラン、N−β(アミノエチル)−γ−アミノプロピルトリメトキシシラン、γ−アミノプロピルトリエトキシシラン、N−フェニル−γ−アミノプロピルトリメトキシシラン等のアミノ官能性アルコキシシラン、γ−メルカプトプロピルトリメトキシシラン等のメルカプト官能性アルコキシシランなどを用いることが好ましい。なお、表面処理に用いるカップリング剤の配合量及び表面処理方法については特に制限されるものではない。
In order to increase the bonding strength between the resin and the inorganic filler, the inorganic filler may be blended with a surface treated in advance with a coupling agent such as a silane coupling agent or a titanate coupling agent.
Examples of such a coupling agent include epoxy functions such as γ-glycidoxypropyltrimethoxysilane, γ-glycidoxypropylmethyldiethoxysilane, and β- (3,4-epoxycyclohexyl) ethyltrimethoxysilane. Functional alkoxysilanes such as N-β (aminoethyl) -γ-aminopropyltrimethoxysilane, γ-aminopropyltriethoxysilane, N-phenyl-γ-aminopropyltrimethoxysilane, and γ-mercapto It is preferable to use a mercapto functional alkoxysilane such as propyltrimethoxysilane. The amount of coupling agent used for the surface treatment and the surface treatment method are not particularly limited.

無機充填剤の充填量は、(A−1)エポキシ樹脂と(A−2)酸無水物の総量100質量部に対し、20〜700質量部、特に50〜400質量部が好ましい。20質量部未満では、十分な強度を得ることができないおそれがあり、700質量部を超えると、増粘による未充填不良や柔軟性が失われることで、素子内の剥離等の不良が発生する場合がある。なお、この無機充填剤は、組成物全体の10〜90質量%、特に20〜80質量%の範囲で含有することが好ましい。   The filling amount of the inorganic filler is preferably 20 to 700 parts by weight, particularly 50 to 400 parts by weight with respect to 100 parts by weight of the total amount of (A-1) epoxy resin and (A-2) acid anhydride. If the amount is less than 20 parts by mass, sufficient strength may not be obtained. If the amount exceeds 700 parts by mass, unfilled defects due to thickening and flexibility are lost, resulting in defects such as peeling in the element. There is a case. In addition, it is preferable to contain this inorganic filler in the range of 10-90 mass% of the whole composition, especially 20-80 mass%.

(E)硬化触媒
この(E)成分の硬化触媒としては、エポキシ樹脂組成物の硬化触媒として公知のものが使用でき、特に限定されないが、第三級アミン類、イミダゾール類、それらの有機カルボン酸塩、有機カルボン酸金属塩、金属−有機キレート化合物、芳香族スルホニウム塩、有機ホスフィン化合物類、ホスホニウム化合物類等のリン系硬化触媒、これらの塩類等の1種又は2種以上を使用することができる。これらの中でも、イミダゾール類、リン系硬化触媒、例えば2−エチル−4−メチルイミダゾール又はメチル−トリブチルホスホニウム−ジメチルホスフェイト、第四級ホスホニウムブロマイドが更に好ましい。
(E) Curing catalyst The curing catalyst for the component (E) may be any known curing catalyst for epoxy resin compositions, and is not particularly limited, but includes tertiary amines, imidazoles, and their organic carboxylic acids. It is possible to use one type or two or more types of phosphorus-based curing catalysts such as salts, organic carboxylic acid metal salts, metal-organic chelate compounds, aromatic sulfonium salts, organic phosphine compounds and phosphonium compounds, and salts thereof. it can. Among these, imidazoles, phosphorus-based curing catalysts such as 2-ethyl-4-methylimidazole, methyl-tributylphosphonium-dimethyl phosphate, and quaternary phosphonium bromide are more preferable.

硬化触媒の使用量は、組成物全体の0.05〜5質量%、特に0.1〜2質量%の範囲内で配合することが好ましい。上記範囲を外れると、エポキシ樹脂組成物の硬化物の耐熱性及び耐湿性のバランスが悪くなるおそれがある。   It is preferable to mix the curing catalyst in an amount of 0.05 to 5% by mass, particularly 0.1 to 2% by mass of the entire composition. If it is out of the above range, the balance of heat resistance and moisture resistance of the cured product of the epoxy resin composition may be deteriorated.

(F)酸化防止剤
本発明のエポキシ樹脂組成物には、必要により、酸化防止剤を配合することができる。
(F)成分の酸化防止剤としては、フェノール系、リン系、硫黄系酸化防止剤を使用でき、酸化防止剤の具体例としては、以下のような酸化防止剤が挙げられる。
(F) Antioxidant An antioxidant can be mix | blended with the epoxy resin composition of this invention as needed.
(F) As an antioxidant of a component, a phenol type, phosphorus type, and sulfur type antioxidant can be used, and the following antioxidants are mentioned as a specific example of antioxidant.

フェノール系酸化防止剤としては、2,6−ジ−t−ブチル−p−クレゾール、ブチル化ヒドロキシアニソール、2,6−ジ−t−ブチル−p−エチルフェノール、ステアリル−β−(3,5−ジ−t−ブチル−4−ヒドロキシフェニル)プロピオネート、2,2’−メチレンビス(4−メチル−6−t−ブチルフェノール)、4,4’−ブチリデンビス(3−メチル−6−t−ブチルフェノール)、3,9−ビス[1,1−ジメチル−2−{β−(3−t−ブチル−4−ヒドロキシ−5−メチルフェニル)プロピオニルオキシ}エチル]2,4,8,10−テトラオキサスピロ[5,5]ウンデカン、1,1,3−トリス(2−メチル−4−ヒドロキシ−5−t−ブチルフェニル)ブタン、1,3,5−トリメチル−2,4,6−トリス(3,5−ジ−t−ブチル−4−ヒドロキシベンジル)ベンゼン等が挙げられ、中でも2,6−ジ−t−ブチル−p−クレゾールが好ましい。   Examples of phenolic antioxidants include 2,6-di-t-butyl-p-cresol, butylated hydroxyanisole, 2,6-di-t-butyl-p-ethylphenol, stearyl-β- (3,5 -Di-t-butyl-4-hydroxyphenyl) propionate, 2,2'-methylenebis (4-methyl-6-t-butylphenol), 4,4'-butylidenebis (3-methyl-6-t-butylphenol), 3,9-bis [1,1-dimethyl-2- {β- (3-tert-butyl-4-hydroxy-5-methylphenyl) propionyloxy} ethyl] 2,4,8,10-tetraoxaspiro [ 5,5] undecane, 1,1,3-tris (2-methyl-4-hydroxy-5-tert-butylphenyl) butane, 1,3,5-trimethyl-2,4,6-tris (3 , 5-di-t-butyl-4-hydroxybenzyl) benzene, among which 2,6-di-t-butyl-p-cresol is preferable.

リン系酸化防止剤としては、亜リン酸トリフェニル、亜リン酸ジフェニルアルキル、亜リン酸フェニルジアルキル、亜リン酸トリ(ノニルフェニル)、亜リン酸トリラウリル、亜リン酸トリオクタデシル、トリフェニルホスファイト、ジステアリルペンタエリトリトールジホスファイト、トリス(2,4−ジ−tert−ブチルフェニル)ホスファイト、ジイソデシルペンタエリトリトールジホスファイト、ジ(2,4−ジ−tert−ブチルフェニル)ペンタエリトリトールジホスファイト、トリステアリルソルビトールトリホスファイト及びテトラキス(2,4−ジ−tert−ブチルフェニル)−4,4’−ビフェニルジホスホネート等が挙げられ、中でも亜リン酸トリフェニルが好ましい。   Phosphorus antioxidants include triphenyl phosphite, diphenylalkyl phosphite, phenyl dialkyl phosphite, tri (nonylphenyl) phosphite, trilauryl phosphite, trioctadecyl phosphite, triphenyl phosphite Distearyl pentaerythritol diphosphite, tris (2,4-di-tert-butylphenyl) phosphite, diisodecylpentaerythritol diphosphite, di (2,4-di-tert-butylphenyl) pentaerythritol diphosphite , Tristearyl sorbitol triphosphite, tetrakis (2,4-di-tert-butylphenyl) -4,4′-biphenyl diphosphonate and the like, among which triphenyl phosphite is preferable.

また、硫黄系酸化防止剤としては、ジラウリル−3,3’−チオジプロピオネート、ジミリスチル−3,3’−チオジプロピオネート、ジステアリル−3,3’−チオジプロピオネート等が挙げられる。   Examples of sulfur-based antioxidants include dilauryl-3,3′-thiodipropionate, dimyristyl-3,3′-thiodipropionate, and distearyl-3,3′-thiodipropionate. .

これらの酸化防止剤は、それぞれ単独で又は2種以上を組み合わせて使用できるが、リン系酸化防止剤単独又はフェノール系酸化防止剤とリン系酸化防止剤とを組み合わせて使用することが特に好ましい。この場合、フェノール系酸化防止剤とリン系酸化防止剤との使用割合は、質量比でフェノール系酸化防止剤:リン系酸化防止剤=0:100〜70:30、特に0:100〜50:50とすることが好ましい。   These antioxidants can be used alone or in combination of two or more, but it is particularly preferable to use a phosphorus antioxidant alone or a combination of a phenolic antioxidant and a phosphorus antioxidant. In this case, the use ratio of the phenolic antioxidant and the phosphorus antioxidant is, as a mass ratio, phenolic antioxidant: phosphorus antioxidant = 0: 100 to 70:30, particularly 0: 100 to 50: 50 is preferable.

酸化防止剤の配合量は、エポキシ樹脂組成物中、0.01〜10質量%、特に0.03〜5質量%とすることが好ましい。配合量が少なすぎると十分な耐熱性が得られず、変色する場合があり、多すぎると硬化阻害を起こし、十分な硬化性、強度を得ることができない場合がある。   The blending amount of the antioxidant is preferably 0.01 to 10% by mass, particularly 0.03 to 5% by mass in the epoxy resin composition. If the amount is too small, sufficient heat resistance may not be obtained and discoloration may occur, while if too large, curing inhibition may occur, and sufficient curability and strength may not be obtained.

その他のエポキシ樹脂
また、本発明の組成物には、必要に応じて、(A−1)成分以外のエポキシ樹脂を本発明の効果を損なわない範囲で一定量以下(特に、(A−1)成分100質量部に対し0〜40質量部、特に5〜20質量部の割合で)配合することができる。このエポキシ樹脂の例として、ビスフェノールA型エポキシ樹脂、ビスフェノールF型エポキシ樹脂、3,3’,5,5’−テトラメチル−4,4’−ビフェノール型エポキシ樹脂又は4,4’−ビフェノール型エポキシ樹脂のようなビフェノール型エポキシ樹脂、フェノールノボラック型エポキシ樹脂、クレゾールノボラック型エポキシ樹脂、ビスフェノールAノボラック型エポキシ樹脂、ナフタレンジオール型エポキシ樹脂、トリスフェニロールメタン型エポキシ樹脂、テトラキスフェニロールエタン型エポキシ樹脂、及びフェノールジシクロペンタジエンノボラック型エポキシ樹脂の芳香環を水素化したエポキシ樹脂等が挙げられる。
なお、その他のエポキシ樹脂の軟化点は70〜100℃であることが好ましい。
Other epoxy resins In addition, in the composition of the present invention, if necessary, an epoxy resin other than the component (A-1) is not more than a certain amount within a range not impairing the effects of the present invention (particularly, (A-1) 0 to 40 parts by mass, particularly 5 to 20 parts by mass) with respect to 100 parts by mass of the component. Examples of this epoxy resin include bisphenol A type epoxy resin, bisphenol F type epoxy resin, 3,3 ′, 5,5′-tetramethyl-4,4′-biphenol type epoxy resin, or 4,4′-biphenol type epoxy resin. Biphenol type epoxy resin such as resin, phenol novolac type epoxy resin, cresol novolac type epoxy resin, bisphenol A novolak type epoxy resin, naphthalenediol type epoxy resin, trisphenylol methane type epoxy resin, tetrakisphenylol ethane type epoxy resin, And an epoxy resin obtained by hydrogenating an aromatic ring of a phenol dicyclopentadiene novolac type epoxy resin.
In addition, it is preferable that the softening point of another epoxy resin is 70-100 degreeC.

その他の添加剤
本発明のエポキシ樹脂組成物には、更に必要に応じて各種の添加剤を配合することができる。例えば、樹脂の性質を改善する目的で種々の熱可塑性樹脂、熱可塑性エラストマー、有機合成ゴム、シリコーン系等の低応力剤、ハロゲントラップ剤等の添加剤を本発明の効果を損なわない範囲で添加配合することができる。
Other Additives Various additives can be further blended in the epoxy resin composition of the present invention as necessary. For example, various thermoplastic resins, thermoplastic elastomers, organic synthetic rubbers, silicone-based low-stress agents, halogen trapping agents, and other additives are added within the range that does not impair the effects of the present invention in order to improve the properties of the resin. Can be blended.

エポキシ樹脂組成物の調製方法
本発明のエポキシ樹脂組成物を成形材料として調製する場合の方法としては、反応物として、予め(A−1),(A−2)成分、又は(A−1),(A−2),(F)成分を混合して、70〜120℃、好ましくは80〜110℃の温度範囲にて、又は、予め(A−1),(A−2),(E)成分、又は(A−1),(A−2),(E),(F)成分の各成分を混合して30〜80℃、好ましくは40〜60℃の温度範囲にて、無溶媒の加温可能な反応釜等の装置により均一に溶融混合し、混合物が常温で取扱うのに十分な軟化点、具体的には50〜100℃、より好ましくは60〜90℃になるまで増粘させたものを冷却して、固形化したものを使用する。
Preparation Method of Epoxy Resin Composition As a method for preparing the epoxy resin composition of the present invention as a molding material, (A-1), (A-2) component or (A-1) , (A-2) and (F) components are mixed and in a temperature range of 70 to 120 ° C., preferably 80 to 110 ° C., or in advance (A-1), (A-2), (E ) Component, or (A-1), (A-2), (E), and (F) components are mixed and solvent-free in a temperature range of 30 to 80 ° C., preferably 40 to 60 ° C. The mixture is uniformly melted and mixed with a device such as a reaction kettle capable of heating, and the mixture is thickened until it reaches a softening point sufficient for handling at room temperature, specifically 50 to 100 ° C, more preferably 60 to 90 ° C. The cooled product is cooled and solidified.

この場合、これら成分を混合する温度域としては、(A−1),(A−2)成分、又は(A−1),(A−2),(F)成分を混合する場合は70〜120℃が適切であるが、より好ましくは80〜110℃の範囲である。混合温度が70℃未満では、室温で固形となるような混合物を得るためには温度が低すぎ、120℃を超える温度では、反応速度が速くなりすぎるため、期待した反応度で反応を停止することが難しくなってしまう。なお、(A−1),(A−2),(E)成分、又は(A−1),(A−2),(E),(F)成分を混合する場合の温度は上記の通りであるが、混合温度が低すぎる場合、逆に高すぎる場合の不利は上記と同様である。   In this case, as a temperature range for mixing these components, the components (A-1) and (A-2) or the components (A-1), (A-2) and (F) are mixed in a range of 70 to Although 120 degreeC is suitable, More preferably, it is the range of 80-110 degreeC. If the mixing temperature is less than 70 ° C, the temperature is too low to obtain a mixture that becomes solid at room temperature, and if the temperature exceeds 120 ° C, the reaction rate becomes too fast, so the reaction is stopped at the expected degree of reactivity. It becomes difficult. In addition, the temperature in the case of mixing (A-1), (A-2), (E) component or (A-1), (A-2), (E), (F) component is as above-mentioned. However, when the mixing temperature is too low, the disadvantage when it is too high is the same as described above.

次に、この固形物(反応物)を粉砕した後、(B),(C),(D)成分、及び(E),(F)成分を上記固形物(反応物)の調製に用いない場合は(E)成分や必要により(F)成分の各成分、その他の添加物を所定の組成比で配合し、これをミキサー等によって十分均一に混合した後、熱ロール、ニーダー、エクストルーダー等による溶融混合処理を行い、次いで冷却固化させ、適当な大きさに粉砕してエポキシ樹脂組成物の成形材料とすることができる。   Next, after pulverizing the solid (reactant), the components (B), (C), (D), and (E), (F) are not used for the preparation of the solid (reactant). In this case, the components (E) and, if necessary, each component of component (F) and other additives are blended at a predetermined composition ratio, and after sufficiently mixing with a mixer or the like, a heat roll, a kneader, an extruder, etc. Then, the mixture can be cooled and solidified, and pulverized to an appropriate size to obtain a molding material for the epoxy resin composition.

このようにして得られる本発明のエポキシ樹脂組成物は、LED素子等の発光素子を除く(但し、発光素子と受光素子とが一体化されたフォトカプラーは包含する)半導体・電子機器装置、特にはフォトカプラー用の封止材として有効に利用できる。なおここで、本発明の組成物を用いた半導体素子の一例であるフォトカプラーの断面図を図1に示す。図1で示されるフォトカプラーは、化合物半導体からなる半導体素子1がリードフレーム2にダイボンドされ、更にボンディングワイヤ3により別のリードフレーム(図示せず)にワイヤボンドされている。また、この半導体素子1と対向するように受光用の半導体素子4がリードフレーム5上にダイボンドされ、更にボンディングワイヤ6により別のリードフレーム(図示せず)にワイヤボンディングされている。これらの半導体素子の間は透明封止樹脂7により充填されている。更に、この封止樹脂7により被覆された半導体素子は本発明の熱硬化性エポキシ樹脂組成物の硬化物8により樹脂封止されている。   The epoxy resin composition of the present invention thus obtained excludes light emitting elements such as LED elements (however, includes a photocoupler in which a light emitting element and a light receiving element are integrated), particularly a semiconductor / electronic device device, Can be effectively used as a sealing material for photocouplers. Here, FIG. 1 shows a cross-sectional view of a photocoupler which is an example of a semiconductor element using the composition of the present invention. In the photocoupler shown in FIG. 1, a semiconductor element 1 made of a compound semiconductor is die-bonded to a lead frame 2 and further bonded to another lead frame (not shown) by a bonding wire 3. Further, a semiconductor element 4 for light reception is die-bonded on a lead frame 5 so as to face the semiconductor element 1 and further wire-bonded to another lead frame (not shown) by a bonding wire 6. A space between these semiconductor elements is filled with a transparent sealing resin 7. Further, the semiconductor element covered with the sealing resin 7 is resin-sealed with a cured product 8 of the thermosetting epoxy resin composition of the present invention.

この場合、本発明の熱硬化性エポキシ樹脂組成物の封止の最も一般的な方法としては低圧トランスファー成形法が挙げられる。なお、本発明のエポキシ樹脂組成物の成形温度は150〜185℃で30〜180秒行うことが望ましい。後硬化は150〜185℃で2〜20時間行ってもよい。   In this case, the most common method for sealing the thermosetting epoxy resin composition of the present invention is a low-pressure transfer molding method. In addition, as for the shaping | molding temperature of the epoxy resin composition of this invention, it is desirable to carry out for 30 to 180 second at 150-185 degreeC. The post-curing may be performed at 150 to 185 ° C. for 2 to 20 hours.

以下、実験例、実施例及び比較例を示し、本発明を具体的に説明するが、本発明は下記の実施例に制限されるものではない。   EXAMPLES Hereinafter, although an experimental example, an Example, and a comparative example are shown and this invention is demonstrated concretely, this invention is not restrict | limited to the following Example.

下記例で使用した原料を以下に示す。
(A−1)エポキシ樹脂
トリアジン誘導体エポキシ樹脂;トリス(2,3−エポキシプロピル)イソシアネート(TEPIC−S:日産化学工業(株)製商品名、エポキシ当量100)
(A−2)酸無水物
非炭素炭素二重結合酸無水物;メチルヘキサヒドロ無水フタル酸(リカシッドMH:新日本理化(株)製商品名)
The raw materials used in the following examples are shown below.
(A-1) Epoxy resin Triazine derivative epoxy resin; Tris (2,3-epoxypropyl) isocyanate (TEPIC-S: trade name, manufactured by Nissan Chemical Industries, Ltd., epoxy equivalent 100)
(A-2) Acid anhydride Non-carbon carbon double bond acid anhydride; methylhexahydrophthalic anhydride (Ricacid MH: trade name, manufactured by Shin Nippon Rika Co., Ltd.)

(B)内部離型剤
(B−1)グリセリンモノステアレート(H−100;理研ビタミン(株)製商品名)
(B−2)プロピレングリコールモノベヘネート(PB−100;理研ビタミン(株)製商品名)
(B−3)グリセリントリ12−ヒドロキシステアレート(TG−12;理研ビタミン(株)製商品名)
(B−4)ポリエチレンワックス(PE−190;クラリアントジャパン(株)製商品名)
(B−5)酸化ポリエチレンワックス(H−22;クラリアントジャパン(株)製商品名)
(B−6)酸ワックス;ステアリン酸(和光純薬(株)製商品名)
(B−7)モンタン酸ワックス(LICOWAX S;クラリアントジャパン(株)製商品名)
(B−8)エステルワックス(LICOWAX E;クラリアントジャパン(株)製商品名)
(B−9)カルナバワックス(カルナバワックスNS−1P;日興ファイン製商品名)
(B−10)メタロセンワックス(P−65;クラリアントジャパン(株)製商品名)
(B) Internal mold release agent (B-1) Glycerol monostearate (H-100; trade name, manufactured by Riken Vitamin Co., Ltd.)
(B-2) Propylene glycol monobehenate (PB-100; trade name, manufactured by Riken Vitamin Co., Ltd.)
(B-3) Glycerol tri-12-hydroxystearate (TG-12; trade name, manufactured by Riken Vitamin Co., Ltd.)
(B-4) Polyethylene wax (PE-190; product name manufactured by Clariant Japan Co., Ltd.)
(B-5) Oxidized polyethylene wax (H-22; trade name, manufactured by Clariant Japan Co., Ltd.)
(B-6) acid wax; stearic acid (trade name, manufactured by Wako Pure Chemical Industries, Ltd.)
(B-7) Montanic acid wax (LICOWAX S; trade name, manufactured by Clariant Japan Co., Ltd.)
(B-8) Ester wax (LICOWAX E; trade name, manufactured by Clariant Japan Co., Ltd.)
(B-9) Carnauba wax (Carnauba wax NS-1P; trade name, manufactured by Nikko Fine)
(B-10) Metallocene wax (P-65; trade name, manufactured by Clariant Japan Co., Ltd.)

(C)反射部材
二酸化チタン;ルチル型(R−45M:堺化学工業(株)製商品名)
(D)無機充填剤;破砕溶融シリカ((株)龍森製商品名)
(C) Reflective member Titanium dioxide; rutile type (R-45M: trade name manufactured by Sakai Chemical Industry Co., Ltd.)
(D) Inorganic filler; crushed fused silica (trade name, manufactured by Tatsumori Co., Ltd.)

(E)硬化触媒
(E−1)リン系硬化触媒;メチル−トリブチルホスホニウム−ジメチルホスフェイト(PX−4MP:日本化学(株)製商品名)
(E−2)イミダゾール系触媒;2−エチル−4−メチルイミダゾール(2E4MZ:四国化成(株)製商品名)
(E) Curing catalyst (E-1) Phosphorus-based curing catalyst; methyl-tributylphosphonium-dimethyl phosphate (PX-4MP: product name manufactured by Nippon Chemical Co., Ltd.)
(E-2) Imidazole-based catalyst; 2-ethyl-4-methylimidazole (2E4MZ: trade name, manufactured by Shikoku Kasei Co., Ltd.)

(F)酸化防止剤
(F−1)リン系酸化防止剤;亜リン酸トリフェニル(和光純薬(株)製商品名)
(F−2)フェノール系酸化防止剤;2,6−ジ−t−ブチル−p−クレゾール(BHT:和光純薬(株)製商品名)
(F) Antioxidant (F-1) Phosphorous antioxidant; Triphenyl phosphite (trade name, manufactured by Wako Pure Chemical Industries, Ltd.)
(F-2) phenolic antioxidant; 2,6-di-t-butyl-p-cresol (BHT: trade name, manufactured by Wako Pure Chemical Industries, Ltd.)

(G)その他のエポキシ樹脂
(G−1)ビスフェノールA型水素添加エポキシ樹脂(YL−7170:ジャパンエポキシレジン(株)製商品名、エポキシ当量1200)
(G−2)ビフェニル型水素添加エポキシ樹脂(YL−7040:ジャパンエポキシレジン(株)製商品名、エポキシ当量220)
(G−3)ビスフェノールA型エポキシ樹脂(E1004:ジャパンエポキシレジン(株)製商品名、エポキシ当量890)
(G) Other epoxy resin (G-1) Bisphenol A type hydrogenated epoxy resin (YL-7170: trade name, manufactured by Japan Epoxy Resins Co., Ltd., epoxy equivalent 1200)
(G-2) Biphenyl-type hydrogenated epoxy resin (YL-7040: Japan Epoxy Resin Co., Ltd. trade name, epoxy equivalent 220)
(G-3) Bisphenol A type epoxy resin (E1004: Japan Epoxy Resin Co., Ltd. trade name, epoxy equivalent 890)

(H)その他の硬化剤
(H−1)含炭素炭素二重結合酸無水物;テトラヒドロ無水フタル酸(リカシッドTH:新日本理化(株)製商品名)
(H−2)フェノールノボラック樹脂(TD−2131:大日本インキ化学工業(株)製商品名)
(H) Other curing agent (H-1) Carbon-containing carbon double bond acid anhydride; Tetrahydrophthalic anhydride (Licacid TH: trade name, manufactured by Shin Nippon Rika Co., Ltd.)
(H-2) Phenol novolac resin (TD-2131: trade name, manufactured by Dainippon Ink & Chemicals, Inc.)

[実験例1〜10]
表1に示す通り、各内部離型剤において、以下の特性を測定した。結果を表1に示す。
《耐熱黄変性》
各内部離型剤をアルミシャレ内に10gづつ入れ、180℃で24時間放置し、黄変性を比較した。
[Experimental Examples 1 to 10]
As shown in Table 1, the following characteristics were measured for each internal mold release agent. The results are shown in Table 1.
《Heat-resistant yellowing》
10 g of each internal mold release agent was put in an aluminum dish and allowed to stand at 180 ° C. for 24 hours to compare yellowing.

[実施例1〜10、比較例1〜8]
まず、表1に示す実験例の結果より、耐熱黄変性の良好であった実験例1〜4、やや良好であった実験例5,6を選んだ。
エポキシ樹脂、酸無水物、酸化防止剤を予め反応釜により、100℃にて3時間溶融混合し、冷却して固化させた後(軟化点は60℃)、粉砕し、他成分と所定の組成比にて配合し、熱2本ロールにて均一に溶融混合し、冷却、粉砕してフォトカプラー用白色エポキシ樹脂組成物を得た。
[Examples 1 to 10, Comparative Examples 1 to 8]
First, from the results of the experimental examples shown in Table 1, Experimental Examples 1 to 4 that were good in heat-resistant yellowing and Experimental Examples 5 and 6 that were slightly good were selected.
An epoxy resin, acid anhydride, and antioxidant are melted and mixed in advance in a reaction kettle at 100 ° C for 3 hours, cooled and solidified (softening point is 60 ° C), pulverized, and prescribed composition with other components The mixture was blended at a ratio, uniformly melt-mixed with two hot rolls, cooled and pulverized to obtain a white epoxy resin composition for a photocoupler.

これらの組成物につき、以下の諸特性を測定した。結果を表2,3に示す。
《スパイラルフロー値》
EMMI規格に準じた金型を使用して、175℃、6.9N/mm2、成形時間120秒の条件で測定した。
The following properties were measured for these compositions. The results are shown in Tables 2 and 3.
<Spiral flow value>
Using a mold conforming to the EMMI standard, measurement was performed under the conditions of 175 ° C., 6.9 N / mm 2 , and molding time of 120 seconds.

《溶融粘度》
高化式フローテスターを用い、10kgfの加圧下、直径1mmのノズルを用い、温度175℃で粘度を測定した。
<Melt viscosity>
Using a Koka flow tester, the viscosity was measured at a temperature of 175 ° C. using a nozzle with a diameter of 1 mm under a pressure of 10 kgf.

《曲げ強度》
EMMI規格に準じた金型を使用して、175℃、6.9N/mm2、成形時間120秒の条件で測定した。
《Bending strength》
Using a mold conforming to the EMMI standard, measurement was performed under the conditions of 175 ° C., 6.9 N / mm 2 , and molding time of 120 seconds.

《連続成形性》
1フレームに6キャビティーを持った100P−QFP(14x20x2.7mm)のパッケージデザインである金型をセットした連続成形機において、メラミン樹脂、離型回復剤で金型をクリーニング後、180℃、60秒で連続成形した際、ゲート、ランナー折れ等の離型不良、無充填発生のいずれかにより連続成形が途絶えるまでのショット数を比較した(300ショットを上限とした。)
<Continuous formability>
In a continuous molding machine set with a 100P-QFP (14x20x2.7mm) package design with 6 cavities in one frame, the mold is cleaned with melamine resin and mold release agent, then 180 ° C, 60 ° C When continuous molding was performed in seconds, the number of shots until continuous molding was interrupted due to a mold release failure such as gate or runner breakage or the occurrence of no filling was compared (up to 300 shots).

《耐熱性;黄変性》
175℃、6.9N/mm2、成形時間2分の条件で直径50×3mmの円盤を成形し、180℃で24時間放置し、黄変性を比較した。
<Heat resistance: yellowing>
A disk having a diameter of 50 × 3 mm was molded under the conditions of 175 ° C., 6.9 N / mm 2 and molding time of 2 minutes, and left at 180 ° C. for 24 hours to compare yellowing.

本発明の熱硬化性樹脂組成物を用いたフォトカプラーの一例を示すものである。An example of a photocoupler using the thermosetting resin composition of the present invention is shown.

符号の説明Explanation of symbols

1 半導体素子
2 リードフレーム
3 ボンディングワイヤ
4 半導体素子
5 リードフレーム
6 ボンディングワイヤ
7 透明封止樹脂
8 熱硬化性エポキシ樹脂組成物の硬化物
DESCRIPTION OF SYMBOLS 1 Semiconductor element 2 Lead frame 3 Bonding wire 4 Semiconductor element 5 Lead frame 6 Bonding wire 7 Transparent sealing resin 8 Hardened | cured material of thermosetting epoxy resin composition

Claims (8)

(A)トリアジン誘導体エポキシ樹脂と酸無水物とをエポキシ基当量/酸無水物基当量0.6〜2.0の割合で反応させて得られる反応物、
(B)内部離型剤、
(C)反射部材、
(D)無機充填剤、
(E)硬化触媒
を必須成分とするエポキシ樹脂組成物であって、(B)成分の内部離型剤が、下記一般式(1)

(式中、R1,R2,R3はH,−OH,−OR,−OCOCabのいずれかであり、少なくともひとつは−OCOCabを含む。RはCn2n+1のアルキル基(nは1〜30の整数である)、aは10〜30の整数、bは17〜61の整数である。)
で示され、融点が50〜90℃の範囲である成分を含有してなることを特徴とする熱硬化性エポキシ樹脂組成物。
(A) a reaction product obtained by reacting a triazine derivative epoxy resin and an acid anhydride at a ratio of epoxy group equivalent / acid anhydride group equivalent of 0.6 to 2.0,
(B) an internal release agent,
(C) a reflective member,
(D) inorganic filler,
(E) An epoxy resin composition containing a curing catalyst as an essential component, wherein the internal mold release agent of component (B) is represented by the following general formula (1)

(Wherein R 1 , R 2 and R 3 are any one of H, —OH, —OR, and —OCOC a H b , and at least one includes —OCOC a H b . R represents C n H 2n + 1 is an alkyl group (n is an integer of 1 to 30), a is an integer of 10 to 30, and b is an integer of 17 to 61.)
A thermosetting epoxy resin composition comprising a component having a melting point in the range of 50 to 90 ° C.
更に、(F)酸化防止剤を含有する請求項1記載の熱硬化性エポキシ樹脂組成物。   The thermosetting epoxy resin composition according to claim 1, further comprising (F) an antioxidant. (A)成分のトリアジン誘導体エポキシ樹脂が、1,3,5−トリアジン核誘導体エポキシ樹脂である請求項1又は2記載の熱硬化性エポキシ樹脂組成物。   The thermosetting epoxy resin composition according to claim 1 or 2, wherein the (A) component triazine derivative epoxy resin is a 1,3,5-triazine nucleus derivative epoxy resin. 上記(A)成分の固形物が、下記一般式(2)

(式中、R4は酸無水物残基、mは0〜200の数である。)
で示される化合物を含有するものである請求項3記載の熱硬化性エポキシ樹脂組成物。
The solid (A) component is represented by the following general formula (2)

(In the formula, R 4 is an acid anhydride residue, and m is a number from 0 to 200.)
The thermosetting epoxy resin composition of Claim 3 containing the compound shown by these.
内部離型剤が、融点50〜70℃であるグリセリンモノステアレートを含むものであり、全組成物に対して0.2〜5.0質量%含有することを特徴とする請求項1乃至4のいずれか1項記載の熱硬化性エポキシ樹脂組成物。   The internal mold release agent contains glycerin monostearate having a melting point of 50 to 70 ° C, and is contained in an amount of 0.2 to 5.0 mass% with respect to the total composition. The thermosetting epoxy resin composition of any one of these. 内部離型剤が、プロピレングリコール脂肪酸エステルを含むものであり、全組成物に対して0.2〜5.0質量%含有することを特徴とする請求項1乃至4のいずれか1項記載の熱硬化性エポキシ樹脂組成物。   The internal mold release agent contains propylene glycol fatty acid ester, and is contained in an amount of 0.2 to 5.0% by mass based on the total composition. Thermosetting epoxy resin composition. 発光素子を除く半導体素子ケース形成用である請求項1乃至6のいずれか1項記載の熱硬化性エポキシ樹脂組成物。   The thermosetting epoxy resin composition according to claim 1, which is used for forming a semiconductor element case excluding a light emitting element. 請求項1乃至6のいずれか1項記載の熱硬化性エポキシ樹脂組成物の硬化物で半導体素子(但し、発光素子を除くが、発光素子と受光素子とが一体化した素子は包含する)を封止した半導体装置。   A semiconductor element made of a cured product of the thermosetting epoxy resin composition according to any one of claims 1 to 6 (excluding a light emitting element but including an element in which a light emitting element and a light receiving element are integrated). A sealed semiconductor device.
JP2007026659A 2007-02-06 2007-02-06 Thermosetting epoxy resin composition and semiconductor apparatus Pending JP2008189833A (en)

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