JP4787374B2 - 半導体装置の製造方法並びにワイヤボンディング装置 - Google Patents
半導体装置の製造方法並びにワイヤボンディング装置 Download PDFInfo
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Description
Claims (8)
- キャピラリの先端に加わる押圧荷重を検出する荷重センサを有するワイヤボンディング装置によって第1ボンド点と第2ボンド点とが接続されるワイヤループを有する半導体装置の製造方法であって、
前記キャピラリによって前記第1ボンド点に前記ワイヤを接合する第1ボンディング工程と、
前記第1ボンディング工程の後、前記キャピラリの先端から前記ワイヤを繰り出しながら前記キャピラリを上昇させ、続いて前記キャピラリを所定の軌跡に沿って前記第2ボンド点に向かってルーピングさせ、前記第2ボンド点に前記ワイヤを接合し、第1ボンド点と第2ボンド点とを接続するワイヤループを形成する第2ボンディング工程と、
前記第2ボンディング工程の後、先端から前記ワイヤを繰り出しながら前記キャピラリを上昇させ、続いて前記キャピラリを前記第1ボンド点に向かって第1の所定距離だけ移動させ、その後、前記キャピラリ先端から繰り出した前記ワイヤが前記ワイヤループの上面に接触し、荷重センサによって検出される押圧荷重が所定の荷重となるまで前記キャピラリを前記ワイヤループに向かって降下させ、前記キャピラリ先端から繰り出した前記ワイヤを前記ワイヤループの上面に沿った形状の第1の折り返し部に形成する第1折り返し工程と、
前記第1折り返し工程の後、さらに先端から前記ワイヤを繰り出しながら前記キャピラリを上昇させ、続いて前記キャピラリを前記第1ボンド点と反対方向に向かって第2の所定距離だけ移動させ、その後前記キャピラリを降下させ、前記キャピラリ先端からさらに繰り出した前記ワイヤを前記第1の折り返し部の上面に沿った第2の折り返し部に形成する第2折り返し工程と、
前記第2折り返し工程の後、前記キャピラリを降下させて前記ワイヤと前記第2ボンド点との接合部の近傍に前記ワイヤをボンディングすると共に、前記キャピラリの前記第1ボンド点側のフェイス部で前記第1、第2の折り返し部の前記第2ボンド点側の少なくとも一部を前記ワイヤループの第2ボンド点側に重ね合わせるように押し潰す第3ボンディング工程と、
を含むことを特徴とする半導体装置の製造方法。 - キャピラリによって第1ボンド点と第2ボンド点との間をワイヤで接続するワイヤボンディング装置であって、
キャピラリの先端に加わる押圧荷重を検出する荷重センサと、
キャピラリをXYZ方向に移動させる移動機構と、
移動機構への指令信号を出力するコンピュータである制御部と、
を備えるワイヤボンディング装置であって、
前記制御部は、
前記制御部が実行し、前記キャピラリによって前記第1ボンド点に前記ワイヤを接合する第1ボンディングプログラムと、
前記第1ボンド点に前記ワイヤを接合した後、前記キャピラリの先端から前記ワイヤを繰り出しながら前記キャピラリを上昇させ、続いて前記キャピラリを所定の軌跡に沿って前記第2ボンド点に向かってルーピングさせ、前記第2ボンド点に前記ワイヤを接合し、第1ボンド点と第2ボンド点とを接続するワイヤループを形成する第2ボンディングプログラムと、
前記制御部が実行し、前記ワイヤループを形成した後、先端から前記ワイヤを繰り出しながら前記キャピラリを上昇させ、続いて前記キャピラリを前記第1ボンド点に向かって第1の所定距離だけ移動させ、その後、前記キャピラリ先端から繰り出した前記ワイヤが前記ワイヤループの上面に接触し、荷重センサによって検出される押圧荷重が所定の荷重となるまで前記キャピラリを前記ワイヤループに向かって降下させ、前記キャピラリ先端から繰り出した前記ワイヤを前記ワイヤループの上面に沿った形状の第1の折り返し部に形成する第1折り返しプログラムと、
前記制御部が実行し、前記第1の折り返し部の形成の後、さらに先端から前記ワイヤを繰り出しながら前記キャピラリを上昇させ、続いて前記キャピラリを前記第1ボンド点と反対方向に向かって第2の所定距離だけ移動させ、その後前記キャピラリを降下させ、前記キャピラリ先端からさらに繰り出した前記ワイヤを前記第1の折り返し部の上面に沿った第2の折り返し部に形成する第2折り返しプログラムと、
前記制御部が実行し、前記第2折り返し部の形成の後、前記キャピラリを降下させて前記ワイヤと前記第2ボンド点との接合部の近傍に前記ワイヤをボンディングすると共に、前記キャピラリの前記第1ボンド点側のフェイス部で前記第1、第2の折り返し部の前記第2ボンド点側の少なくとも一部を前記ワイヤループの第2ボンド点側に重ね合わせるように押し潰す第3ボンディングプログラムと、
を含むことを特徴とするワイヤボンディング装置。 - キャピラリによって第1ボンド点と第2ボンド点とを接続するワイヤループを有する半導体装置の製造方法であって、
前記キャピラリによって前記第1ボンド点に前記ワイヤを接合する第1ボンディング工程と、
前記第1ボンディング工程の後、前記キャピラリの先端から前記ワイヤを繰り出しながら前記キャピラリを上昇させ、続いて前記キャピラリを所定の軌跡に沿って前記第2ボンド点に向かってルーピングさせ、前記第2ボンド点に前記ワイヤを接合し、第1ボンド点と第2ボンド点とを接続するワイヤループを形成する第2ボンディング工程と、
前記第2ボンディング工程の後、先端から前記ワイヤを繰り出しながら前記キャピラリを上昇させ、続いて前記キャピラリを前記第1ボンド点に向かって第1の所定距離だけ移動させ、その後前記キャピラリを前記ワイヤループに向かって降下させ、前記キャピラリ先端から繰り出した前記ワイヤを前記ワイヤループと、前記ワイヤと前記第2ボンド点との接合部との上に折り返して踏み潰しながらボンディングして第1踏み潰し部を形成する第1踏み潰しボンディング工程と、
前記第1踏み潰しボンディング工程の後、さらに先端から前記ワイヤを繰り出しながら前記キャピラリを上昇させ、続いて前記キャピラリを前記第1ボンド点と反対方向に向かって第2の所定距離だけ移動させ、その後前記キャピラリを降下させ、前記キャピラリ先端からさらに繰り出した前記ワイヤを前記第1踏み潰し部の上面に沿った第3の折り返し部に形成する第3折り返し工程と、
前記第3折り返し工程の後、更に、前記キャピラリを降下させて前記ワイヤと前記第2ボンド点との前記接合部の近傍に前記ワイヤをボンディングすると共に、前記キャピラリの前記第1ボンド点側のフェイス部で前記第3の折り返し部の前記第2ボンド点側の少なくとも一部を前記第1踏み潰し部の上に重ね合わせるように踏み潰す第2踏み潰しボンディング工程と、
を含むことを特徴とする半導体装置の製造方法。 - 請求項3に記載に半導体装置の製造方法であって、
前記第1踏み潰しボンディング工程は、
前記キャピラリ先端から繰り出した前記ワイヤを、前記ワイヤループと、前記第2ボンド点との前記接合部との上に折り返し、その表面の一部が平面となるまで踏み潰すこと、
を特徴とする半導体装置の製造方法。 - 請求項3または4に記載の半導体装置の製造方法であって、
前記第2踏み潰しボンディング工程は、
前記キャピラリの前記第1ボンド点側のフェイス部で前記第3の折り返し部の前記第2ボンド点側の少なくとも一部を前記第1踏み潰し部の上にその表面の一部が平面となるまで踏み潰すこと、
を特徴とする半導体装置の製造方法。 - 請求項3から5のいずれか1項に記載の半導体装置の製造方法であって、
前記キャピラリは超音波によって加振され、
前記第1ボンディング工程、前記第2ボンディング工程、前記第1踏み潰しボンディング工程、前記第2踏み潰しボンディング工程は、
ボンディングの際に前記キャピラリを超音波加振すること、
を特徴とする半導体装置の製造方法。 - 請求項3から6のいずれか1項に記載の半導体装置の製造方法であって、
前記第2踏み潰しボンディング工程の後、キャピラリを上昇させてワイヤを切断するワイヤ切断工程を含むこと、
を特徴とする半導体装置の製造方法。 - キャピラリによって第1ボンド点と第2ボンド点との間をワイヤで接続するワイヤボンディング装置であって、
キャピラリをXYZ方向に移動させる移動機構と、
移動機構への指令信号を出力するコンピュータである制御部と、
を備えるワイヤボンディング装置であって、
前記制御部は、
前記制御部が実行し、前記キャピラリによって前記第1ボンド点に前記ワイヤを接合する第1ボンディングプログラムと、
前記第1ボンド点に前記ワイヤを接合した後、前記キャピラリの先端から前記ワイヤを繰り出しながら前記キャピラリを上昇させ、続いて前記キャピラリを所定の軌跡に沿って前記第2ボンド点に向かってルーピングさせ、前記第2ボンド点に前記ワイヤを接合し、第1ボンド点と第2ボンド点とを接続するワイヤループを形成する第2ボンディングプログラムと、
前記制御部が実行し、前記ワイヤループを形成した後、先端から前記ワイヤを繰り出しながら前記キャピラリを上昇させ、続いて前記キャピラリを前記第1ボンド点に向かって第1の所定距離だけ移動させ、その後前記キャピラリを前記ワイヤループに向かって降下させ、前記キャピラリ先端から繰り出した前記ワイヤを前記ワイヤループと、前記ワイヤと前記第2ボンド点との接合部との上に折り返して踏み潰しながらボンディングして第1踏み潰し部を形成する第1踏み潰しボンディングプログラムと、
前記制御部が実行し、前記第1踏み潰し部を形成した後、さらに先端から前記ワイヤを繰り出しながら前記キャピラリを上昇させ、続いて前記キャピラリを前記第1ボンド点と反対方向に向かって第2の所定距離だけ移動させ、その後前記キャピラリを降下させ、前記キャピラリ先端からさらに繰り出した前記ワイヤを前記第1踏み潰し部の上面に沿った第3の折り返し部に形成する第3折り返しプログラムと、
前記制御部が実行し、前記第3折り返し部を形成した後、更に、前記キャピラリを降下させて前記ワイヤと前記第2ボンド点との前記接合部の近傍に前記ワイヤをボンディングすると共に、前記キャピラリの前記第1ボンド点側のフェイス部で前記第3の折り返し部の前記第2ボンド点側の少なくとも一部を前記第1踏み潰し部の上に重ね合わせるように踏み潰す第2踏み潰しボンディングプログラムと、
を含むことを特徴とするワイヤボンディング装置。
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