JP5526698B2 - 光反射性導電粒子、異方性導電接着剤及び発光装置 - Google Patents
光反射性導電粒子、異方性導電接着剤及び発光装置 Download PDFInfo
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- JP5526698B2 JP5526698B2 JP2009239578A JP2009239578A JP5526698B2 JP 5526698 B2 JP5526698 B2 JP 5526698B2 JP 2009239578 A JP2009239578 A JP 2009239578A JP 2009239578 A JP2009239578 A JP 2009239578A JP 5526698 B2 JP5526698 B2 JP 5526698B2
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- 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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Description
(光反射性導電粒子の作成)
平均粒子径0.5μmの酸化チタン粉末(KR−380、チタン工業(株))4質量部と、外観色が茶色の平均粒径5μmのAu被覆樹脂導電粒子(平均粒径4.6μmの球状アクリル樹脂粒子に0.2μm厚の無電解金メッキを施した粒子:ブライト20GNB4.6EH、日本化学工業(株))20質量部とを、メカノフュージョン装置(AMS−GMP、ホソカワミクロン(株))に投入し、回転速度1000rpm、回転時間20分という条件で導電粒子の表面に、酸化チタン粒子からなる約0.3μm厚の光反射層を成膜することにより、実施例1の光反射性導電粒子を得た。この光反射性導電粒子の外観色は灰色であった。
得られた光反射性導電粒子15質量部と、屈折率が約1.5の無色透明な熱硬化型エポキシ系バインダー組成物(YX−8000、JER(株))100質量部とを真空脱泡撹拌装置を用いて均一に混合することにより、実施例1の異方性導電接着剤を得た。
光反射率評価試験の際に調製した異方性導電接着剤を用いて、50μmピッチの銅配線にNi/Au(5.0μm厚/0.3μm厚)メッキ処理した配線を有するガラスエポキシ基板に、15μm高の金バンプを有する6mm角の試験用ICチップ(導体接続面積/導体−スペース=1600μm2/50μmP)を200℃、60秒、1Kg/チップという条件でフィリップチップ実装し、テスト用ICモジュールを得た。
得られたテスト用ICモジュールに対し、低温(−40℃)と高温(100℃)の温度に交互に加熱・冷却する温度サイクル試験(TCT)(JIS C5030)を行い、初期と500サイクル後の4端子法による抵抗値を測定した。抵抗値が1Ω未満の場合を「○」とし、1Ω以上となった場合を「×」と評価した。得られた結果を表1に示す。
別途作成したテスト用ICモジュールに対し、85℃、85%RHの環境下に1000時間放置というエージング試験を行い、初期と1000時間後の抵抗値を測定した。抵抗値が106Ω以上の場合を「○」とし、106Ω未満となった場合を「×」と評価した。得られた結果を表1に示す。
Au被覆樹脂導電粒子に代えて、平均粒子径5.0μmのNi被覆樹脂導電粒子(52NR−4.6EH、日本化学工業(株))を使用すること以外、実施例1と同様にして外観色が灰色の光反射性導電粒子を得、更に異方性導電接着剤を得た。また、実施例1と同様に、光反射率評価試験と電気特性(導通信頼性、絶縁信頼性)評価試験とを行った。得られた結果を表1に示す。
平均粒子径0.5μmの酸化チタン粉末(KR−380、チタン工業(株))4質量部と、接着剤粒子として平均粒子径0.2μmのポリスチレン(PS)粒子(グロスデール204S、三井化学(株))3質量部と、平均粒径5μmの導電粒子(平均粒径4.6μmの球状アクリル樹脂粒子に0.2μm厚の無電解金メッキを施した粒子:ブライト20GNB4.6EH、日本化学工業(株))20質量部とを、メカノフュージョン装置(AMS−GMP、ホソカワミクロン(株))に投入し、回転速度1000rpm、回転時間20分という条件で導電粒子の表面に、スチレンと酸化チタン粒子とからなる約1μm厚の光反射層を成膜することにより、外観色が灰色の光反射性導電粒子を得、更に異方性導電接着剤を得た。また、実施例1と同様に、光反射率評価試験と電気特性(導通信頼性、絶縁信頼性)評価試験とを行った。得られた結果を表1に示す。
Au被覆樹脂導電粒子に代えて、平均粒子径5.0μmのNi被覆樹脂導電粒子(52NR−4.6EH、日本化学工業(株))を使用すること以外、実施例3と同様にして外観色が灰色の光反射性導電粒子を得、更に異方性導電接着剤を得た。また、更に、実施例1と同様に、光反射率評価試験と電気特性(導通信頼性、絶縁信頼性)評価試験とを行った。得られた結果を表1に示す。
平均粒子径0.2μmのポリスチレン粒子(グロスデール204S、三井化学(株))に代えて、平均粒子径0.2μmのポリエチレン(PE)粒子(アミパールWF300、三井化学(株))を使用すること以外、実施例3と同様にして外観色が灰色の光反射性導電粒子を得、更に異方性導電接着剤を得た。また、実施例1と同様に、光反射率評価試験と電気特性(導通信頼性、絶縁信頼性)評価試験とを行った。得られた結果を表1に示す。
平均粒子径0.5μmの酸化チタン粉末に代えて、平均粒子径0.5μmの酸化亜鉛粉末(酸化亜鉛1種、ハクスイテック(株))を使用すること以外、実施例3と同様にして外観色が灰色の光反射性導電粒子を得、更に異方性導電接着剤を得た。また、実施例1と同様に、光反射率評価試験と電気特性(導通信頼性、絶縁信頼性)評価試験とを行った。得られた結果を表1に示す。
平均粒子径0.5μmの酸化チタン粉末に代えて、平均粒子径0.5μmの酸化アルミニウム粉末(AE−2500SI、アドマテックス(株))を使用すること以外、実施例3と同様にして外観色が灰色の光反射性導電粒子を得、更に異方性導電接着剤を得た。また、実施例1と同様に、光反射率評価試験と電気特性(導通信頼性、絶縁信頼性)評価試験とを行った。得られた結果を表1に示す。
平均粒子径0.5μmの酸化チタン粉末に代えて、平均粒子径0.5μmの炭酸マグネシウムを使用すること以外、実施例3と同様にして外観色が灰色の光反射性導電粒子を得、更に異方性導電接着剤を得た。また、実施例1と同様に、光反射率評価試験と電気特性(導通信頼性、絶縁信頼性)評価試験とを行った。得られた結果を表1に示す。
平均粒子径0.5μmの酸化チタン粉末に代えて、平均粒子径0.2μmの酸化チタン粉末(JR405、テイカ(株))を使用すること以外、実施例3と同様にして外観色が灰色の光反射性導電粒子を得、更に異方性導電接着剤を得た。また、実施例1と同様に、光反射率評価試験と電気特性(導通信頼性、絶縁信頼性)評価試験とを行った。得られた結果を表1に示す。
外観色が茶色のAu被覆樹脂導電粒子(平均粒径4.6μmの球状アクリル樹脂粒子に0.2μm厚の無電解金メッキを施した粒子:ブライト20GNB4.6EH、日本化学工業(株))を用い、実施例1と同様に異方性導電接着剤を得た。また、実施例1と同様に、光反射率評価試験と電気特性(導通信頼性、絶縁信頼性)評価試験とを行った。得られた結果を表1に示す。光反射率については図3にも示す。
Au被覆樹脂導電粒子に代えて、外観色が茶色の平均粒子径5.0μmのNi被覆樹脂導電粒子(52NR−4.6EH、日本化学工業(株))を使用すること以外、比較例1と同様に異方性導電接着剤を得た。また、実施例1と同様に、光反射率評価試験と電気特性(導通信頼性、絶縁信頼性)評価試験とを行った。得られた結果を表1に示す。
平均粒子径0.2μmのポリスチレン系粒子(グロスデール204S、三井化学(株))3質量部と、平均粒径5μmの導電粒子(平均粒径4.6μmの球状アクリル樹脂粒子に0.2μm厚の無電解金メッキを施した粒子:ブライト20GNB4.6EH、日本化学工業(株))20質量部とを、メカノフュージョン装置(AMS−GMP、ホソカワミクロン(株))に投入し、回転速度1000rpm、回転時間20分という条件で導電粒子の表面に、0.2μm厚のスチレン層を成膜することにより、外観色が茶色の樹脂被覆導電粒子を得、更に異方性導電接着剤を得た。また、実施例1と同様に、光反射率評価試験と電気特性(導通信頼性、絶縁信頼性)評価試験とを行った。得られた結果を表1に示す。
平均粒子径0.5μmの酸化チタン粉末に代えて、平均粒子径0.5μmの酸化ケイ素粉末(シーホスターKEP−30、日本触媒(株))を使用すること以外、実施例3と同様にして外観色が茶色の導電粒子を得、更に異方性導電接着剤を得た。また、実施例1と同様に、光反射率評価試験と電気特性(導通信頼性、絶縁信頼性)評価試験とを行った。得られた結果を表1に示す。
2 光反射性無機粒子
3 光反射層
4 熱可塑性樹脂
10、20 光反射性導電粒子
11 熱硬化性樹脂組成物の硬化物
21 基板
22 接続端子
23 LED素子
24 n電極
25 p電極
26 バンプ
100 異方性導電接着剤の硬化物
200 発光装置
Claims (7)
- 発光素子を配線板に異方性導電接続するために使用する異方性導電接着剤用の光反射性導電粒子であって、金属材料で被覆されているコア粒子と、その表面に屈折率が1.52以上の光反射性無機粒子から形成された光反射層とからなり、外観色が灰色であり、
該光反射性無機粒子が、酸化チタン粒子、酸化亜鉛粒子又は酸化アルミニウム粒子から選択された少なくとも一種の無機粒子である光反射性導電粒子。 - コア粒子を被覆する金属材料が、金、ニッケル又は銅である請求項1記載の光反射性導電粒子。
- コア粒子そのものが、金、ニッケル又は銅の粒子である請求項1記載の光反射性導電粒子。
- コア粒子が、樹脂粒子を金、ニッケル又は銅で被覆したものである請求項1又は2記載の光反射性導電粒子。
- コア粒子の粒子径が1〜20μmであり、光反射層の層厚がコア粒子径の0.5〜50%である請求項1〜4のいずれかに記載の光反射性導電粒子。
- 光反射層が、熱可塑性樹脂を含有する請求項1〜5のいずれかに記載の光反射性導電粒子。
- 熱可塑性樹脂が、ポリオレフィンである請求項6記載の光反射性導電粒子。
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JP2011086823A (ja) | 2011-04-28 |
CN102576798A (zh) | 2012-07-11 |
TWI450280B (zh) | 2014-08-21 |
KR20120070537A (ko) | 2012-06-29 |
US20140103266A1 (en) | 2014-04-17 |
US20120175660A1 (en) | 2012-07-12 |
TW201447922A (zh) | 2014-12-16 |
TWI534839B (zh) | 2016-05-21 |
TW201142876A (en) | 2011-12-01 |
EP2490271A4 (en) | 2014-08-06 |
US9340710B2 (en) | 2016-05-17 |
US8796725B2 (en) | 2014-08-05 |
EP2490271A1 (en) | 2012-08-22 |
WO2011045962A1 (ja) | 2011-04-21 |
CN102576798B (zh) | 2016-11-16 |
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