JP5398455B2 - 異方性導電フィルム及びその製造方法 - Google Patents
異方性導電フィルム及びその製造方法 Download PDFInfo
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- JP5398455B2 JP5398455B2 JP2009225771A JP2009225771A JP5398455B2 JP 5398455 B2 JP5398455 B2 JP 5398455B2 JP 2009225771 A JP2009225771 A JP 2009225771A JP 2009225771 A JP2009225771 A JP 2009225771A JP 5398455 B2 JP5398455 B2 JP 5398455B2
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- resin
- anisotropic conductive
- conductive film
- film
- resin layer
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- C09J9/00—Adhesives characterised by their physical nature or the effects produced, e.g. glue sticks
- 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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- H01B5/16—Non-insulated conductors or conductive bodies characterised by their form comprising conductive material in insulating or poorly conductive material, e.g. conductive rubber
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- Wire Bonding (AREA)
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Description
図1は、本発明の一実施の形態に係る異方性導電フィルムを示す断面図である。この異方性導電フィルム10は、200kPa以上のタック力を有する第1の樹脂層11と、導電性粒子を含有する第2の樹脂層12とが積層されている。この異方性導電フィルム10を用いて電子部品をガラス基板に実装させる場合、電子部品側が第1の樹脂層11、ガラス基板側が第2の樹脂層12となるように固着される。特に、本実施の形態に係る異方性導電フィルム10は、表面実装機によって第1の樹脂層11上に電子部品が複数仮搭載され、熱圧着により電子部品と他の電子部品とを同時実装するのに用いられる。表面実装機としては、例えば1.0〜0.1秒/チップ程度に高速仮搭載可能なものを用いることができる。また、表面実装機を用いて仮搭載する電子部品としては、表面実装機に適用可能なSMD(Surface Mount Device)であれば、特に制限されないが、例えば液晶表示装置を製造する際のSMDとしてはコンデンサを挙げることができる。
次に、上述した異方性導電フィルムの製造方法について説明する。本実施の形態における異方性導電フィルムの製造方法は、200kPa以上のタック力を有する第1の樹脂膜を、導電性粒子を含有する第2の樹脂膜上に形成する。ここで、第1の樹脂膜と第2の樹脂膜とを貼り付けてもよいし、一方の樹脂膜を形成後、他方の樹脂を塗布乾燥(重ね塗り)させてもよい。なお、第1の樹脂膜及び第2の樹脂膜は、それぞれ第1の樹脂層11及び第2の樹脂層12を構成する。
次に、異方性導電フィルムを用いた電子部品の実装方法について説明する。本実施の形態に係る異方性導電フィルムは、タック力が高いため小型SMDを高速仮搭載しても位置ずれが生じにくい。また、2層構造であるため、粒子捕捉性が良く、ファインピッチのICを実装することができる。すなわち、本実施の形態に係る異方性導電フィルムによれば、大きさ、種類などの異なる電子部品を一括実装することができる。
膜厚25μmの樹脂Fからなる1層構造の異方性導電フィルムを作製した。
膜厚25μmの樹脂Gからなる1層構造の異方性導電フィルムを作製した。
膜厚15μmの樹脂Aからなる第1の樹脂膜と、膜厚10μmの樹脂Gからなる第2の樹脂膜とを貼り付け、2層構造の異方性導電フィルムを作製した。なお、この異方性導電フィルムを用いて電子部品をガラス基板に実装させる場合は、電子部品側が第1の樹脂膜、ガラス基板側が第2の樹脂膜となるように固着される。
膜厚15μmの樹脂Bからなる第1の樹脂膜と、膜厚10μmの樹脂Gからなる第2の樹脂膜とを貼り付け、2層構造の異方性導電フィルムを作製した。なお、この異方性導電フィルムを用いて電子部品をガラス基板に実装させる場合は、サンプル3と同様に電子部品側が第1の樹脂膜、ガラス基板側が第2の樹脂膜となるように固着される。
膜厚15μmの樹脂Cからなる第1の樹脂膜と、膜厚10μmの樹脂Gからなる第2の樹脂膜とを貼り付け、2層構造の異方性導電フィルムを作製した。なお、この異方性導電フィルムを用いて電子部品をガラス基板に実装させる場合は、サンプル3と同様に電子部品側が第1の樹脂膜、ガラス基板側が第2の樹脂膜となるように固着される。
膜厚15μmの樹脂Dからなる第1の樹脂膜と、膜厚10μmの樹脂Gからなる第2の樹脂膜とを貼り付け、2層構造の異方性導電フィルムを作製した。なお、この異方性導電フィルムを用いて電子部品をガラス基板に実装させる場合は、サンプル3と同様に電子部品側が第1の樹脂膜、ガラス基板側が第2の樹脂膜となるように固着される。
膜厚15μmの樹脂Eからなる第1の樹脂膜と、膜厚10μmの樹脂Gからなる第2の樹脂膜とを貼り付け、2層構造の異方性導電フィルムを作製した。なお、この異方性導電フィルムを用いて電子部品をガラス基板に実装させる場合は、サンプル3と同様に電子部品側が第1の樹脂膜、ガラス基板側が第2の樹脂膜となるように固着される。
タック試験機((株)レスカ製TACII)を用い、22℃の雰囲気下において、プローブ直径5mm(ステンレス製鏡面、円柱状)、押し付け荷重196kgf、押し付け速度30mm/min、剥離速度5mm/minの測定条件で行い、ピーク強度を各サンプルのタック力(kPa)とした。ここで、各サンプルのタック力は、電子部品搭載側のフィルムのタック力を表す。
表面実装機(ヤマハ発動機(株)社製YV100II)を用いて、0.7mm厚のガラス基板(コーニング(株)製1737F)上の各サンプルに10個のSMD((株)村田製作所製1005コンデンサ、外形寸法:L1.0mm×W0.5mm×H0.4mm)を0.3mmの素子間ギャップで仮搭載した。SMDの位置ずれがある場合を×、位置ずれがない場合を○とした。
0.7mm厚のガラス基板(コーニング(株)製1737F)上の各サンプルにIC(バンプ間スペース:12.5μm)を熱圧着し、接続体を得た。ガラス基板の隣接するパッド間に30Vの電圧を加え絶縁抵抗を測定し、絶縁抵抗が1.0×10−6Ω以下をショートとした。ショートの場合を×とし、ショートでない場合を○とした。
ICを仮固定した際の各バンプ下に存在する導電性粒子の数(平均)と、熱圧着後の粒子捕捉数(平均)とをカウントし、下記式により捕捉効率を求めた。捕捉効率が20%以上の場合を○とし、20%未満の場合を×とした。
捕捉効率(%)=(熱圧着後に捕捉した粒子数)/(仮固定時バンプ下に存在する粒子数)×100
0.7mm厚のガラス基板(コーニング(株)製1737F)上の各サンプルにIC(バンプ間スペース:12.5μm)を熱圧着し、接続体を得た。そして、ICのバンプとガラス基板のパッド間の初期接続抵抗(Ω)を測定した。接続抵抗が5Ωより小さい場合を○、5Ω以上の場合を×とした。
0.7mm厚のガラス基板(コーニング(株)製1737F)上の各サンプルにIC(バンプ間スペース:12.5μm)を熱圧着し、接続体を得た。そして、この接続体を引張強度50cm/minで90℃方向に剥離したときの剥離強度を初期接着強度(N/cm)とした。接着強度が3N/cmより小さい場合を×とし、3N/cm以上の場合を○とした。
応力制御型レオメータ(Haake社製RS150)を用い、各サンプルの最低粘度(kPa・s)を測定した。コーンとしては直径8mm、角度2度のものを使用し、測定範囲は30℃〜250℃とした。また、電子部品搭載側の樹脂フィルム及びガラス基板側の樹脂フィルムについても同様にして測定した。
各サンプルを2.0mmにスリットし、コア直径を2.54mm、外形110mmのリールに0.2N/mm2のテンションで巻き取り、室温で1日放置した。外観観察により、はみ出しが無い場合を○とし、はみ出しが有る場合を×とした。
Claims (6)
- 200kPaより高いタック力を有する第1の樹脂層と、
導電性粒子を含有する第2の樹脂層とが積層され、
表面実装機によって上記第1の樹脂層上に電子部品が複数高速仮搭載され、熱圧着により上記電子部品と他の電子部品とを同時実装するのに用いられる異方性導電フィルム。 - 常温での粘度が、10〜1000kPa・sである請求項1記載の異方性導電フィルム。
- 上記第1の樹脂層及び上記第2の樹脂層が、膜形成樹脂と、液状エポキシ樹脂と、潜在性硬化剤とを含有する請求項2記載の異方性導電フィルム。
- 上記第2の樹脂層が、無機フィラーを含有する請求項3記載の異方性導電フィルム。
- 上記第1の樹脂層が、無機フィラーを含有する請求項4記載の異方性導電フィルム。
- 上記請求項1記載の異方性導電フィルムを製造する製造方法。
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JP2009225771A JP5398455B2 (ja) | 2009-09-30 | 2009-09-30 | 異方性導電フィルム及びその製造方法 |
PCT/JP2010/066938 WO2011040458A1 (ja) | 2009-09-30 | 2010-09-29 | 異方性導電フィルム及びその製造方法 |
TW099133204A TWI456595B (zh) | 2009-09-30 | 2010-09-29 | 異向性導電膜及其製造方法 |
KR1020127010312A KR20120098646A (ko) | 2009-09-30 | 2010-09-29 | 이방성 도전 필름 및 그 제조 방법 |
CN201080054185.4A CN102668250B (zh) | 2009-09-30 | 2010-09-29 | 各向异性导电膜及其制造方法 |
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