JP5728810B2 - 半導体ウェハ加工用フィルムを用いた半導体チップの製造方法 - Google Patents
半導体ウェハ加工用フィルムを用いた半導体チップの製造方法 Download PDFInfo
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- JP5728810B2 JP5728810B2 JP2010025702A JP2010025702A JP5728810B2 JP 5728810 B2 JP5728810 B2 JP 5728810B2 JP 2010025702 A JP2010025702 A JP 2010025702A JP 2010025702 A JP2010025702 A JP 2010025702A JP 5728810 B2 JP5728810 B2 JP 5728810B2
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- semiconductor wafer
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- semiconductor chip
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Description
した状態を維持させることができる。
複数弾性率G*={(G’)2+(G”)2}1/2 (1)
粘度η=G*/2πf (2)
C(%)=((A−B)/A)×100 (3)
三次元架橋性樹脂としてエポキシ樹脂NC7000(日本化薬株式会社製、商品名)15重量部、三次元架橋性樹脂と反応する硬化剤としてフェノールアラルキル樹脂XLC−LL(三井化学株式会社製、商品名)15重量部、分子量100万以下、Tg40℃以下、かつ三次元架橋製樹脂と反応可能な官能基を側鎖に少なくとも1カ所含む共重合性樹脂としてエポキシ基含有アクリルゴムHTR−860P−3(ナガセケムテックス株式会社製、商品名、重量平均分子量30万)20重量部、マイクロカプセル型硬化剤としてHX−3941HP(旭化成株式会社製、商品名)50重量部及びシランカップリング剤SH6040(東レ・ダウコーニングシリコーン製、商品名)を用い、トルエンと酢酸エチルの混合溶媒中に溶解した。一方、粉砕し、大粒径を除去するための5μmの分級処理を行った平均粒径1μmのコージェライト粒子(2MgO・2Al2O3・5SiO2、比重2.4、線膨張係数1.5×10−6/℃、屈折率1.57)100重量部を混ぜ、撹拌して分散することで、接着剤層形成用のワニスを得た。このときのワニスの粘度は約25Pa・sであった。
この接着剤層形成用ワニスを幅350mmの表面に離型処理が施された基材(PETフィルム)上に320mm×320mmの正方形に、且つ間のピッチが100mmとなるようにダイコーターを用いて間欠状に塗工を行った。その後、熱風循環式乾燥機で乾燥させて、基材上に厚み50μm、320mm×320mmの正方形パターンの接着剤層を有する半導体ウェハ加工用フィルムを得た。また、接着剤層にはじき、樹脂のダレ、形状くずれがないことを確認した。
作製した半導体ウェハ加工用フィルムを多数の半導体素子を有する半導体ウェハ(直径12インチ、約30cm)上に載せて、温度80℃、圧力0.2MPaのラミネーターを用いて貼合した。貼合後、半導体ウェハサイズに合わせて半導体ウェハ加工用フィルムを切り落とし、接着剤層付き半導体ウェハを得た。この際、接着剤層のロスは約30%であった。
実施例1記載の接着剤層の組成で樹脂組成物とフィラーからなるワニスを作製した。作製したワニスを幅350mmの表面に離型処理が施された基材(PETフィルム)上にコンマコーターを用いて幅320mmで塗工した。その後、熱風循環式乾燥機で乾燥させて、基材上に厚み50μm、幅320mm、長さ30mのロール状の半導体ウェハ加工用フィルムを得た。また、接着剤層にはじき、樹脂のダレ、形状くずれがないことを確認した。
作製した半導体ウェハ加工用フィルムを多数の半導体素子を有する半導体ウェハ(直径12インチ、約30cm)に載せて、温度80℃、圧力0.2MPaのラミネーターを用いて貼合した。貼合後、半導体ウェハのサイズに合わせて半導体ウェハ加工用フィルムを切り落とし、接着剤層付き半導体ウェハを得た。この際、接着剤層のロスは約45%であった。
Claims (4)
- 接着剤層を備える半導体ウェハ加工用フィルムの前記接着剤層を、突起電極が形成された半導体ウェハの電極面に貼付した状態で、前記半導体ウェハを切断する半導体チップの製造方法であって、
前記半導体ウェハ加工用フィルムとして、基材上に分離層および接着剤層がこの順に積層され、前記接着剤層は、前記フィルムを貼付すべき前記半導体ウェハの全体を覆う形状に個別化されて前記分離層上に複数存在し、前記接着剤層の凝集力が前記分離層の凝集力より大きい、半導体ウェハ加工用フィルムを用い、
切断する前記半導体ウェハが、前記半導体ウェハ加工用フィルムの前記接着剤層を半導体ウェハに貼付した後、半導体ウェハサイズに合わせて半導体ウェハ用加工用フィルムを切り落とすことにより得られた接着剤層付き半導体ウェハである、半導体チップの製造方法。 - 前記接着剤層の形状は、円形状又は四角形状である、請求項1に記載の半導体チップの製造方法。
- 前記接着剤層の形状は、前記ウェハと接着剤層を積層したときに、前記ウェハに対する接着剤層の最大はみ出し部の長さが50mm以下となる形状である、請求項1又は2に記載の半導体チップの製造方法。
- 前記接着剤層は、1〜300mmの間隔で複数存在する、請求項1〜3のいずれか一項に記載の半導体チップの製造方法。
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