JP2008258492A - 半導体装置製造用接着シート - Google Patents
半導体装置製造用接着シート Download PDFInfo
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Abstract
【解決手段】 本発明の半導体装置製造用の接着シートは、少なくとも半導体素子及び導電部を封止樹脂により封止された半導体装置の製造に使用する半導体装置製造用接着シートであって、前記半導体装置製造用接着シートは、基材上に少なくとも厚さ15μm以上の接着剤層を有して構成され、前記接着剤層の硬化後の引張伸度は、引張速度200mm/分の条件下で、4〜15%の範囲内であることを特徴とする。
【選択図】 図1
Description
即ち、本発明によれば、半導体素子等が封止樹脂により封止された封止体の下面に、前記導電部の一部を表出させた半導体装置の製造に際して、ゴム成分及びエポキシ樹脂成分を含み構成された接着剤層を備える接着シートを用い、該エポキシ樹脂成分として前記一般式(1)で表されるジアセタール構造を分子内に有するものを用いることにより、接着剤層が凝集破壊を起こすのを防止する。これにより、スタンドオフ部に於ける糊残りの発生を防止することができ、その結果、剥離性に優れた半導体装置製造用接着シートを提供することができる。
アクリロニトリルブタジエンゴム(日本ゼオン(株)製、商品名;Nipol 1072J)23.5部、多官能型エポキシ樹脂(日本化薬(株)製、商品名;EPPN501HY;エポキシ当量170g/eq)27部、ジアセタール構造を分子内に有するエポキシ樹脂(大日本インキ化学工業(株)製、EPICRON EXA−4850−150、エポキシ当量450g/eq)27部、フェノール樹脂(明和化成(株)製、商品名;MEH7500;OH当量97g/eq)22部、トリフェニルフォスフィン(北興化成(株)製、商品名;TPP)0.5部を配合し、濃度35重量%となるようにMEK溶媒に溶解し、接着剤溶液を作製した。
アクリロニトリルブタジエンゴム(日本ゼオン(株)製、商品名;Nipol 1072J)23.5部、多官能型エポキシ樹脂(日本化薬(株)製、EPPN501HY;エポキシ当量170g/eq)27部、ジアセタール構造を分子内に有するエポキシ樹脂(大日本インキ化学工業(株)製、EPICRON EXA−4850−1000、エポキシ当量350g/eq)27部、フェノール樹脂(明和化成(株)製、商品名;MEH7500;OH当量97g/eq)23部、トリフェニルフォスフィン(北興化成(株)製、商品名;TPP)0.5部を配合し、濃度35重量%となるようにMEK溶媒に溶解し、接着剤溶液を作製した。
アクリロニトリルブタジエンゴム(日本ゼオン(株)製、商品名;Nipol 1072J)23.5部、ビスフェノールA型エポキシ樹脂(ジャパンエポキシレジン(株)製、商品名;YL980;エポキシ当量180g/eq)27部、ジアセタール構造を分子内に有するエポキシ樹脂(大日本インキ化学工業(株)製、EPICRON EXA−4850−1000、エポキシ当量350g/eq)27部、フェノール樹脂(明和化成(株)製、商品名;MEH7500;OH当量97g/eq)22部、トリフェニルフォスフィン(北興化成(株)製、商品名;TPP)0.5部を配合し、濃度35重量%となるようにMEK溶媒に溶解し、接着剤溶液を作製した。
アクリロニトリルブタジエンゴム(日本ゼオン(株)製、商品名;Nipol 1072J)23.5部、多官能型エポキシ樹脂(日本化薬(株)製、商品名;EPPN501HY;エポキシ当量170g/eq)38部、ビスフェノールA型エポキシ樹脂(ジャパンエポキシレジン(株)製、商品名;YL980;エポキシ当量180g/eq)10部、フェノール樹脂(明和化成(株)製、商品名;MEH7500;OH当量97g/eq)27部、トリフェニルフォスフィン(北興化成(株)製、商品名;TPP)0.5部を配合し、濃度35重量%となるようにMEK溶媒に溶解し、接着剤溶液を作製した。
アクリロニトリルブタジエンゴム(日本ゼオン(株)製、商品名;Nipol DN1201L)23.5部、ビスフェノールA型エポキシ樹脂(ジャパンエポキシレジン(株)製、商品名;YL980;エポキシ当量180g/eq)27.5部、ジアセタール構造を分子内に有するエポキシ樹脂(大日本インキ化学工業(株)製、EPICRON EXA−4850−150、エポキシ当量450g/eq)27.5部、フェノール樹脂(明和化成(株)製、商品名;MEH7500;OH当量97g/eq)21部、トリフェニルフォスフィン(北興化成(株)製、商品名;TPP)0.5部を配合し、濃度35重量%となるようにMEK溶媒に溶解し、接着剤溶液を作製した。
前記の実施例1、2及び比較例1、2の接着シートについて、以下の方法により、引張貯蔵弾性率、引張伸度、投錨力、剥離力、糊残り性の各評価を行った。これらの結果は表1に示される通りであった。
離型処理を施した剥離ライナ上に、各実施例又は各比較例で使用した接着剤組成物の溶液を塗布して乾燥し、厚さ100μmの接着剤層を形成した。この接着剤層を150℃で1hrオーブン中に放置した後、粘弾性測定装置(レオメトリックス社製:形式:RSA−II)を用いて、各接着剤層の硬化後に於ける200℃での引張貯蔵弾性率を測定した。より詳細にはサンプルサイズを長さ30.0×幅5.0×厚さ0.1mmとし、測定試料をフィルム引っ張り測定用治具にセットし、50℃〜250℃の温度域で周波数1.0Hz、歪み0.025%、昇温速度10℃/分の条件下で測定した。
離型処理を施した剥離ライナ上に、各実施例又は各比較例で使用した接着剤組成物の溶液を塗布して乾燥し、厚さ100μmの接着剤層を形成した。この接着剤層を150℃で1hrオーブン中に放置した後、万能引張試験機を用いて、大気圧下、25℃での各接着剤層の引張伸度を測定した。より詳細にはサンプルサイズを長さ150mm×幅10mm×厚さ20μmとし、破断時の変位量より引張伸度(単位:%)を測定した。
各実施例又は各比較例で得られた各接着シートを被着体としての銅箔に貼り合わせ、JIS K 6854−2に準じて投錨力を測定した。具体的には、万能引張試験機を用いて、大気圧下、25℃での180°引き剥がし投錨力(単位:N/10mm)を測定した。また、引き剥がし速度は50mm/minとした。
剥離性の評価は、前記の各接着シートを銅製のリードフレーム(Cu−L/F)のアウターパッド側に貼り合わせた。リードフレームとしては、端子部に一辺16pinタイプのQFNが4個×4個に配列されたものを用いた。また、ラミネート条件としては、温度120℃、圧力0.5MPa、50mm/minとした。
前記剥離力の測定で各接着シートを剥離したときの封止樹脂面及びリードフレーム面に対する糊残りの有無を確認した。
離型処理を施した剥離ライナー上に、各実施例又は各比較例で使用した接着剤溶液をそれぞれ塗布して、120℃で3分間乾燥させた。これにより、厚さ100μmの接着剤層を形成した。更に、総厚みが2mmになる様に接着剤層を積層し、直径8mmの粘弾性測定用試料を作製した。次に、粘弾性測定装置(レオメトリックス社製、商品名;ARES)を用いて、周波数1Hz、歪む5%、昇温速度5℃/分として50〜150℃に於ける粘弾性を測定した。
2 接着剤層
3 基材層(基材)
4 リードフレーム
4a 開口
4b 端子部
5 半導体チップ
6 ボンディングワイヤー
7 下金型
8 上金型
9 封止樹脂
9a 切断部
10 キャビティ
12 界面
13 裏面
14 リードフレーム
14a 開口
14b 端子部
14c ダイパッド
14d ダイバー
15 半導体チップ
15a 電極パッド
16 導電性ペースト
17 ガイドピン用孔
18 金型
18a 上金型
18b 下金型
18c キャビティ
20 パッケージパターン領域
21 構造物
21a 半導体装置
24a ダイパッド部
24b 端子部
26 接着剤
34 導電部
34a 側面
40 導電部
41 金属層
42 面
44 表面
45 保護層
47 メッキリード
48 導体
70 工程フィルム
80 ブロック
81 領域
Claims (5)
- 少なくとも半導体素子及び導電部を封止樹脂により封止された半導体装置の製造に使用する半導体装置製造用接着シートであって、
前記半導体装置製造用接着シートは、基材上に少なくとも厚さ15μm以上の接着剤層を有して構成され、
前記接着剤層の硬化後の引張伸度は、引張速度200mm/分の条件下で、4〜15%の範囲内であることを特徴とする半導体装置製造用接着シート。 - 前記エポキシ樹脂成分は、エポキシ当量1000g/eq以下であることを特徴とする請求項2に記載の半導体装置製造用接着シート。
- 前記基材の200℃に於ける引張貯蔵弾性率が1GPa以上であり、硬化前120℃に於ける粘度が1×103Pa・S以上、硬化後200℃に於ける引張貯蔵弾性率が50MPa以下であることを特徴とする請求項1〜3の何れか1項に記載の半導体装置製造用接着シート。
- 前記接着剤層は、シリコーン成分を含まないことを特徴とする請求項1〜4の何れか1項に記載の半導体装置製造用接着シート。
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JP2014192237A (ja) * | 2013-03-26 | 2014-10-06 | Nitto Denko Corp | 封止シート、半導体装置の製造方法及び封止シート付き基板 |
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