JP2009278079A - 半導体用接着シート及びダイシング一体型半導体用接着シート - Google Patents
半導体用接着シート及びダイシング一体型半導体用接着シート Download PDFInfo
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- JP2009278079A JP2009278079A JP2009100286A JP2009100286A JP2009278079A JP 2009278079 A JP2009278079 A JP 2009278079A JP 2009100286 A JP2009100286 A JP 2009100286A JP 2009100286 A JP2009100286 A JP 2009100286A JP 2009278079 A JP2009278079 A JP 2009278079A
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Abstract
【解決手段】接着剤層を有する半導体用接着シートにおいて、硬化前の前記接着シートが、動的粘弾性装置を使用し、5℃で、周波数500Hz以下、変位95μm以下の条件でエキスパンド試験を行った場合、破断が可能である、半導体用接着シート。
【選択図】なし
Description
すなわち、本発明は以下の記載事項に関する。
1. 接着剤層を有する半導体用接着シートにおいて、硬化前の前記接着シートが、動的粘弾性装置を使用し、5℃で、周波数500Hz以下、変位95μm以下の条件でエキスパンド試験を行った場合、破断が可能であることを特徴とする半導体用接着シート。
2. ワイヤボンディング時に175℃の熱履歴をかけた場合、その3時間後の175℃での貯蔵弾性率が10MPa未満であり、265℃(耐半田リフロー温度)での貯蔵弾性率が5MPa未満であり、かつ、吸湿処理(121℃、2atm、100%RH、20h)前後の半導体パッケージ用基板に対する接着力の比率(吸湿処理後の接着力/吸湿処理前の接着力)が0.9以上であることを特徴とする項1記載の半導体用接着シート。
3. 半導体パッケ−ジ用基板に対する熱圧着後の接着力が4MPa以上である項1または2記載の半導体用接着シート。
4. 接着剤層が高分子量成分を含有してなる項1〜3のいずれかに記載の半導体用接着シート。
5. 高分子量成分のTgが−10〜60℃、高分子量成分の重量平均分子量が10万〜100万であることを特徴とする、項4記載の半導体用接着シート。
6. 接着剤層が、高分子量成分を40〜95重量%含有することを特徴とする、項4または5記載の半導体用接着シート。
7. さらに、接着剤層が、フィラを1〜60重量%含むことを特徴とする項1〜6のいずれかに記載の半導体用接着シート。
8. フィラーの平均一次粒径が、0.005〜0.7μmであることを特徴とする、項7記載の半導体用接着シート。
9. さらに、接着剤層が、平均一次粒径0.005〜0.1μmであるフィラを1〜15重量%含有し、かつ、平均一次粒径0.1〜0.7μmであるフィラを1〜35重量%含有することを特徴とする項1〜6のいずれかに記載の半導体用接着シート。
10. さらに、接着剤層が、低分子量高分子を含有することを特徴とする、項1〜9のいずれかに記載の半導体用接着シート。
11. 低分子量高分子の重量平均分子量が0.1万〜10万であることを特徴とする、項10記載の半導体用接着シート。
12. 項1〜11記載のいずれかに記載の半導体用接着シートと、ダイシングテープを積層してなるダイシング一体型半導体用接着シート。
なお、破断伸度は、例えば、試験片:10mm×30mm、チャック間距離:20mm、試験速度:500mm/minの条件で引張り試験を行ったときの破断伸び値により示される。
低分子量高分子の添加量は、好ましくは1〜50質量部、より好ましくは3〜30質量部、最も好ましくは5〜25質量部である。添加量が1質量部未満では、接着力を得ることが難しく、50質量部以上では硬化後の弾性率が高くなるため埋め込み性が低下する。
<実施例、及び比較例作製方法>
エポキシ樹脂としてYDCN−700−10(東都化成株式会社製商品名、クレゾールノボラック型エポキシ樹脂、エポキシ当量210、Mw=5万)、フェノール樹脂としてミレックスXLC−LL(三井化学株式会社製商品名、フェノール樹脂、水酸基当量175、吸水率1.8%、350℃における加熱質量減少率4%、Mw = 3万)、これら熱硬化成分に対して、シランカップリング剤としてA−1160(GE東芝株式会社製商品名、γ―ウレイドプロピルトリエトキシシラン)、フィラとして、SO−C2(株式会社アドマテック製商品名、シリカ、比表面積7m2/g、平均一次粒径0.4〜0.6μm)、またはアエロジルR972(日本アエロジル株式会社製商品名、シリカ、平均一次粒径0.016μm)からなる組成物に、シクロヘキサノンを加えて攪拌混合し、さらにビーズミルを用いて90分混練した。これにグリシジルアクリレート又はグリシジルメタクリレート2〜6重量%を含むアクリルゴムHTR−860P−3(ナガセケムテック株式会社製商品名、Mw = 100万、Tg =35℃)、硬化促進剤としてキュアゾール2PZ−CN(四国化成工業株式会社製商品名、1−シアノエチル−2−フェニルイミダゾール)を混合攪拌し、真空脱気した。ワニスを厚さ75μmの離型処理したポリエチレンテレフタレートフィルム上に塗布し、140℃で5分間加熱乾燥して、膜厚が20μmのBステージ状態(硬化前)の塗膜を形成し、キャリアフィルムを備えた接着シートを作製した。以下同様に表1の各接着シートを作製した。表1に実施例1、2、比較例1〜4の配合重量部を示す。
動的粘弾性装置に取り付け、5℃、周波数500Hz、変位95μmの条件でエキスパンドを行い、接着シートの切断性を観察する。切断(破断)できた場合は○、切断できない場合は×とする。評価結果を表2に示した。
175℃の貯蔵弾性率の測定を行った。10MPa未満を○、それ以外を×とした。
265℃の貯蔵弾性率の測定を行った。5MPa未満を○、それ以外を×とした。
評価結果を表2に示した。
Claims (12)
- 接着剤層を有する半導体用接着シートにおいて、硬化前の前記接着シートが、動的粘弾性装置を使用し、5℃で、周波数500Hz以下、変位95μm以下の条件でエキスパンド試験を行った場合、破断が可能であることを特徴とする半導体用接着シート。
- ワイヤボンディング時に175℃の熱履歴をかけた場合、その3時間後の175℃での貯蔵弾性率が10MPa未満であり、265℃(耐半田リフロー温度)での貯蔵弾性率が5MPa未満であり、かつ、吸湿処理(121℃、2atm、100%RH、20h)前後の半導体パッケージ用基板に対する接着力の比率(吸湿処理後の接着力/吸湿処理前の接着力)が0.9以上であることを特徴とする請求項1記載の半導体用接着シート。
- 半導体パッケ−ジ用基板に対する熱圧着後の接着力が4MPa以上である請求項1または2記載の半導体用接着シート。
- 接着剤層が高分子量成分を含有してなる請求項1〜3のいずれかに記載の半導体用接着シート。
- 高分子量成分のTgが−10〜60℃、高分子量成分の重量平均分子量が10万〜100万であることを特徴とする、請求項4記載の半導体用接着シート。
- 接着剤層が、高分子量成分を40〜95重量%含有することを特徴とする、請求項4または5記載の半導体用接着シート。
- さらに、接着剤層が、フィラを1〜60重量%含むことを特徴とする請求項1〜6のいずれかに記載の半導体用接着シート。
- フィラーの平均一次粒径が、0.005〜0.7μmであることを特徴とする、請求項7記載の半導体用接着シート。
- さらに、接着剤層が、平均一次粒径0.005〜0.1μmであるフィラを1〜15重量%含有し、かつ、平均一次粒径0.1〜0.7μmであるフィラを1〜35重量%含有することを特徴とする請求項1〜6のいずれかに記載の半導体用接着シート。
- さらに、接着剤層が低分子量高分子を含有することを特徴とする、請求項1〜9のいずれかに記載の半導体用接着シート。
- 低分子量高分子の重量平均分子量が0.1万〜10万であることを特徴とする、請求項10記載の半導体用接着シート。
- 請求項1〜11記載のいずれかに記載の半導体用接着シートと、ダイシングテープを積層してなるダイシング一体型半導体用接着シート。
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