JP4891895B2 - 異方導電性接着剤及びこれを用いた電極の接続方法 - Google Patents
異方導電性接着剤及びこれを用いた電極の接続方法 Download PDFInfo
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- JP4891895B2 JP4891895B2 JP2007506049A JP2007506049A JP4891895B2 JP 4891895 B2 JP4891895 B2 JP 4891895B2 JP 2007506049 A JP2007506049 A JP 2007506049A JP 2007506049 A JP2007506049 A JP 2007506049A JP 4891895 B2 JP4891895 B2 JP 4891895B2
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- anisotropic conductive
- conductive adhesive
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- adhesive film
- foaming
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- C—CHEMISTRY; METALLURGY
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- C09J9/00—Adhesives characterised by their physical nature or the effects produced, e.g. glue sticks
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Description
例えば、熱圧着時における基板の反りによって接続不良が生じたり、液晶表示装置の狭縁化等によって接続部分においてショートが発生したり、また、接続用バンプの微小化によって導電粒子の捕捉性が低下する等の問題がある。
本発明は、絶縁性接着剤成分中に、加圧及び加熱下における当該加圧の解除により膨張して発泡性が発現する発泡成分と、導電粒子とが分散され、フィルム状に形成されている異方導電性接着フィルムである。
本発明は、前記発明において、前記絶縁性接着剤成分中に、独立した状態の泡部が形成されるように発泡成分が分散されているものである。
本発明は、前記発明において、前記発泡成分が、有機溶剤を熱可塑性マイクロカプセルに封入した微粒子を含有するものである。
本発明は、前記発明において、絶縁性接着フィルムが積層されている異方導電性接着フィルムである。
本発明は、絶縁性接着剤成分中に導電粒子が分散されフィルム状に形成されている異方導電性接着フィルムと、加圧及び加熱下における当該加圧の解除により膨張して発泡性が発現する発泡成分を含有する絶縁性接着フィルムとが積層されている異方導電性接着フィルムである。
本発明は、接続用の電極を有する複数の接続部材を前記電極同士を相対向させて配置し、前記複数の接続部材の間に異方導電性接着剤を配置して加熱及び加圧を行うことにより、前記接続部材同士を接着するとともに前記電極同士を電気的に接続する工程を有する電極の接続方法であって、前記異方導電性接着剤として、絶縁性接着剤成分中に加圧及び加熱下における当該加圧の解除により膨張して発泡性が発現する発泡成分と導電粒子とが分散されているものを用い、前記複数の接続部材の間に前記異方導電性接着剤を配置して加熱及び加圧を行った後、当該異方導電性接着剤に対する加圧を解除し、前記発泡成分の発泡性を発現させる工程を有するものである。
本発明は、前記発明において、前記絶縁性接着剤成分中に独立した状態の泡部が形成されるように前記発泡成分が分散されている異方導電性接着剤を用いるものである。
本発明は、前記発明において、前記発泡成分が有機溶剤を熱可塑性マイクロカプセルに封入した微粒子を含有する異方導電性接着剤を用いるものである。
本発明は、前記発明において、前記異方導電性接着剤として、フィルム状に形成された異方導電性接着フィルムを用いるものである。
本発明は、前記発明において、前記異方導電性接着剤として、前記異方導電性接着フィルムに絶縁性接着フィルムが積層されているものを用いるものである。
本発明は、絶縁性接着剤成分中に導電粒子が分散されフィルム状に形成されている異方導電性接着フィルムと、加圧及び加熱下における当該加圧の解除により膨張して発泡性が発現する発泡成分を含有する絶縁性接着フィルムとが
積層されている積層型の異方導電性接着フィルムを用いるものである。
その結果、隣接する電極間における導電粒子の密度が低下し、これにより絶縁特性が向上する。
2 回路基板
3 電極
4 ICチップ
5 バンプ(電極)
6 絶縁性接着剤樹脂
7 導電粒子
8 発泡成分
9 気泡
なお、本発明は、ペースト状又はフィルム状の異方導電性接着剤のいずれにも適用することができるものである。
本発明の場合、導電粒子7としては、従来公知の種々のものを使用することができる。
そして、本発明の異方導電性接着フィルム1は、絶縁性接着剤樹脂6中に、加熱により膨張して発泡性が発現する発泡成分8が分散されている。
この観点から、本発明においては、有機溶剤を熱可塑性マイクロカプセルに封入した微粒子を含有するものを好適に用いることができる。
この仮圧着工程においては、例えば絶縁性接着剤樹脂6がある程度軟化するような温度(例えば40〜70℃)で加熱を行うことが好ましい。
そして、熱圧着ヘッド10を用い、絶縁性接着剤樹脂6を所定の温度(例えば90〜180℃)で加熱することにより本圧着を行う。
この場合、絶縁性接着剤フィルム11がICチップ4と対向するように異方導電性接着フィルム1Aを回路基板2上に配置することが好ましい。
この場合、発泡成分8を含有する絶縁性接着剤フィルム13がICチップ4と対向するように異方導電性接着フィルム1Bを回路基板2上に配置することが好ましい。
その他の構成及び作用効果については上述の実施の形態と同一であるのでその詳細な説明を省略する。
<実施例1>
絶縁性接着剤樹脂としてフェノキシ樹脂(東都化成社製 YP50)40重量部、液状エポキシ樹脂(ジャパンエポキシレジン社製 EP828)30重量部、導電粒子(4μm径、Ni/Auめっき樹脂粒子)20重量部、マイクロカプセル型エポキシ硬化剤(旭化成社製 HX3941HP)、加熱により発泡性が発現する発泡成分として発泡剤A(松本油脂社製 F30VSD 膨張開始温度:約80℃ この温度は、仮圧着工程で僅かに発泡することによってその後の本圧着工程において発泡が促進される温度である。)4重量部を、溶剤としてトルエン20重量部、酢酸エチル20重量部を用いてミキサーで溶解混合させた。
なお、発泡剤は、10μm径の孔のフルイによって分級し合格したものを用いた。
発泡剤として、膨張開始温度が約150℃の発泡剤B(松本油脂社製 F80GSD)を用いた以外は実施例1と同一の方法によってサンプルを作成した。
発泡剤として、膨張開始温度が約150℃の発泡剤C(松本油脂社製 F80VSD)を用いた以外は実施例1と同一の方法によってサンプルを作成した。
乾燥膜厚が15μmとなるように調整した以外は実施例3と同一の方法によってサンプルを作成した。
発泡剤を添加せず、それ以外は実施例1と同一の方法によってサンプルを作成した。
乾燥膜厚が30μmとなるように調整した以外は比較例1と同一の方法によってサンプルを作成した。
実施例及び比較例のサンプルを用い、ICチップをガラス基板上に熱圧着して異方導電性接着フィルムを硬化させた(温度190℃、時間20秒)。
表1に示すように、実施例1〜4の異方導電性接着フィルムは、充填性が良く、またバンプ間における導電粒子詰まりもなかった。なお、実施例1〜4の異方導電性接着フィルムについて、発泡剤の配合量を12重量部としたところ、ほぼ同様の結果が得られた。
Claims (14)
- 絶縁性接着剤成分中に、加圧及び加熱下における当該加圧の解除により膨張して発泡性が発現する発泡成分と、導電粒子とが分散されている異方導電性接着剤。
- 請求項1において、前記絶縁性接着剤成分中に、独立した状態の泡部が形成されるように前記発泡成分が分散されている異方導電性接着剤。
- 請求項1において、前記発泡成分が、有機溶剤を熱可塑性マイクロカプセルに封入した微粒子を含有する異方導電性接着剤。
- 絶縁性接着剤成分中に、加圧及び加熱下における当該加圧の解除により膨張して発泡性が発現する発泡成分と、導電粒子とが分散され、フィルム状に形成されている異方導電性接着フィルム。
- 請求項4において、前記絶縁性接着剤成分中に、独立した状態の泡部が形成されるように前記発泡成分が分散されている異方導電性接着フィルム。
- 請求項4において、前記発泡成分が、有機溶剤を熱可塑性マイクロカプセルに封入した微粒子を含有する異方導電性接着フィルム。
- 請求項4において、絶縁性接着フィルムが積層されている異方導電性接着フィルム。
- 絶縁性接着剤成分中に導電粒子が分散されフィルム状に形成されている異方導電性接着フィルムと、加圧及び加熱下における当該加圧の解除により膨張して発泡性が発現する発泡成分を含有する絶縁性接着フィルムとが積層されている異方導電性接着フィルム。
- 接続用の電極を有する複数の接続部材を前記電極同士を相対向させて配置し、前記複数の接続部材の間に異方導電性接着剤を配置して熱ヘッドによって加熱及び加圧を行うことにより、前記接続部材同士を接着するとともに前記電極同士を電気的に接続する工程を有する電極の接続方法であって、
前記異方導電性接着剤として、絶縁性接着剤成分中に加圧及び加熱下における当該加圧の解除により膨張して発泡性が発現する発泡成分と導電粒子とが分散されているものを用い、
前記複数の接続部材の間に前記異方導電性接着剤を配置して前記熱ヘッドによって加熱及び加圧を行った後、当該異方導電性接着剤に対する加圧を解除し、前記発泡成分の発泡性を発現させる工程を有する電極の接続方法。 - 請求項9において、前記絶縁性接着剤成分中に独立した状態の泡部が形成されるように前記発泡成分が分散されている異方導電性接着剤を用いる電極の接続方法。
- 請求項9において、前記発泡成分が有機溶剤を熱可塑性マイクロカプセルに封入した微粒子を含有する異方導電性接着剤を用いる電極の接続方法。
- 請求項9において、前記異方導電性接着剤として、フィルム状に形成された異方導電性接着フィルムを用いる電極の接続方法。
- 請求項12において、前記異方導電性接着剤として、前記異方導電性接着フィルムに絶縁性接着フィルムが積層されているものを用いる電極の接続方法。
- 接続用の電極を有する複数の接続部材を前記電極同士を相対向させて配置し、前記複数の接続部材の間に異方導電性接着剤を配置して熱ヘッドによって加熱及び加圧を行うことにより、前記接続部材同士を接着するとともに前記電極同士を電気的に接続する工程を有する電極の接続方法であって、
前記異方導電性接着剤として、絶縁性接着剤成分中に導電粒子が分散されフィルム状に形成されている異方導電性接着フィルムと、加圧及び加熱下における当該加圧の解除により膨張して発泡性が発現する発泡成分を含有する絶縁性接着フィルムとが積層されている積層型の異方導電性接着フィルムを用い、
前記複数の接続部材の間に前記積層型の異方導電性接着剤を配置して加熱及び加圧を行った後、当該積層型の異方導電性接着剤に対する加圧を解除し、前記発泡成分の発泡性を発現させる工程を有する電極の接続方法。
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KR101800367B1 (ko) | 2016-08-24 | 2017-11-28 | 한국기계연구원 | 마이크로 소자 전사방법 및 마이크로 소자 전사방법으로 제조된 마이크로 소자 기판 |
WO2018038481A1 (ko) * | 2016-08-24 | 2018-03-01 | 재단법인 파동에너지 극한제어 연구단 | 마이크로 소자 전사방법 및 마이크로 소자 전사방법으로 제조된 마이크로 소자 기판 |
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Also Published As
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KR101298829B1 (ko) | 2013-08-23 |
KR20070116808A (ko) | 2007-12-11 |
CN101146885B (zh) | 2012-09-05 |
CN101146885A (zh) | 2008-03-19 |
HK1116511A1 (en) | 2008-12-24 |
JPWO2006093315A1 (ja) | 2008-08-07 |
TW200632068A (en) | 2006-09-16 |
TWI347348B (en) | 2011-08-21 |
CN102277096A (zh) | 2011-12-14 |
WO2006093315A1 (ja) | 2006-09-08 |
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