JP6794591B1 - 導電性接着シート - Google Patents
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- JP6794591B1 JP6794591B1 JP2020548839A JP2020548839A JP6794591B1 JP 6794591 B1 JP6794591 B1 JP 6794591B1 JP 2020548839 A JP2020548839 A JP 2020548839A JP 2020548839 A JP2020548839 A JP 2020548839A JP 6794591 B1 JP6794591 B1 JP 6794591B1
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- C09J9/02—Electrically-conducting adhesives
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- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
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Abstract
Description
本発明の導電性接着シートは、バインダー成分及び導電性粒子を含有する。上記導電性粒子は、一次粒子、又は一次粒子の凝集体(二次粒子など)として分散配置されている。上記分散配置された導電性粒子は導電性接着シートを平面視した際に、平面方向に複数列に亘って略規則的に配列している。ここで、全ての導電性粒子が規則的に配列していると仮定した状態の、上記分散配置された導電性粒子の分散配置数Npが9〜25箇所となるように導電性接着シートの任意の領域を平面視した際の、上記分散配置された導電性粒子の円相当径の平均値をX、上記平面視した際に規則的に配列した隣り合う上記分散配置された導電性粒子の中心間距離をYとした場合、1.5X≦Y≦100Xを満たす。また、上記任意の領域における上記導電性粒子の一次粒子の個数をNとした場合、N/Npは1.0〜100.0である。また、各領域のNpが9〜25箇所となるように、上記任意の領域を含む重複しない任意の三領域を平面視した際の、上記三領域のうちの二領域以上に存在する導電性粒子の分散配置数をNgとした場合、Ng/Npが0.8〜1.0である。
11 導電性粒子
11a 導電性粒子(一次粒子)
11b 導電性粒子(凝集体)
12 バインダー成分
R 領域
L1 第1配列方向
L2 第2配列方向
α 第1配列方向L1と第1配列方向L2とでなす角度
d1 第1配列方向において隣り合う導電性粒子の中心間距離
d2 第2配列方向において隣り合う導電性粒子の中心間距離
d3 第3配列方向において隣り合う導電性粒子の中心間距離
h1 導電性粒子が配置された部分の厚み
h2 導電性粒子が配置されていない部分の厚み
2 シールドプリント配線板
20 プリント配線板
21 ベース部材
22 接着剤層
23 回路パターン
24 絶縁保護層(カバーレイ)
30 電磁波シールド積層体
31 導電性接着剤層
32 絶縁層
33 スルーホール
40 導電性接着剤層
50 補強板
Claims (9)
- バインダー成分及び導電性粒子を含有する導電性接着シートであり、
前記導電性粒子は、一次粒子又は一次粒子の凝集体として分散配置されており、
全ての導電性粒子が規則的に配列していると仮定した状態の、前記分散配置された導電性粒子の分散配置数Npが9〜25箇所となるように前記導電性接着シートの任意の領域を平面視した際の、前記分散配置された導電性粒子の円相当径の平均値をX、前記平面視した際に規則的に配列した隣り合う前記分散配置された導電性粒子の中心間距離をYとした場合、1.5X≦Y≦100Xを満たし、
前記任意の領域における前記一次粒子の個数をNとした場合、N/Npが1.0〜100.0であり、
各領域のNpが9〜25箇所となるように、前記任意の領域を含む重複しない任意の三領域を平面視した際の、前記三領域のうちの二領域以上に存在する導電性粒子の分散配置数をNgとした場合、Ng/Npが0.8〜1.0であり、
前記中心間距離Yが100〜1000μmである、導電性接着シート。 - 前記N/Npが1.05〜50.0である請求項1に記載の導電性接着シート。
- 前記中心間距離Yの変動係数が0.5以下である請求項1又は2に記載の導電性接着シート。
- 前記バインダー成分として熱硬化性樹脂を含む請求項1〜3のいずれか1項に記載の導電性接着シート。
- 前記導電性粒子の含有割合が前記導電性接着シートの総量100質量%に対して10〜60質量%である請求項1〜4のいずれか1項に記載の導電性接着シート。
- 前記導電性粒子が分散配置された部分の厚みが、前記導電性粒子が配置されていない部分の厚みよりも厚い部分を有する請求項1〜5のいずれか1項に記載の導電性接着シート。
- 前記円相当径の平均値Xが2〜120μmである請求項1〜6のいずれか1項に記載の導電性接着シート。
- 請求項1〜7のいずれか1項に記載の導電性接着シートを有する電磁波シールドフィルム。
- 請求項1〜7のいずれか1項に記載の導電性接着シートを有するグランド接続部材。
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