JP4978445B2 - リードフレームおよび半導体装置の製造方法 - Google Patents
リードフレームおよび半導体装置の製造方法 Download PDFInfo
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Description
図1は、本発明の第1実施形態に係る半導体装置100の概略構成を示す図であり、(a)は概略平面図、(b)は同半導体装置100の概略断面図である。なお、図1(a)では、モールド樹脂7は、その外形線を示すにとどめ、モールド樹脂7の内部の各部要素は、モールド樹脂7を透過した状態にて示してある。
図3は、本発明の第2実施形態に係る半導体装置の製造方法の要部を示す図であり、ワイヤボンディング工程後のワークの概略平面図である。上記第1実施形態との相違点を中心に述べる。
図4は、本発明の第3実施形態に係る半導体装置の製造方法の要部を示す図であり、ワイヤボンディング工程後のワークの概略平面図である。上記第1実施形態との相違点を中心に述べる。
なお、上記各実施形態では、アイランド部3と連結部11とがダミーワイヤ10を介して機械的に接続されていたが、ダミーワイヤ10は、アイランド部3とリードフレーム200のうちのアイランド部3以外の部位とを接続するものであればよい。たとえば、アイランド部3とリード部8とがダミーワイヤ10にて接続されていてもよい。
2 第2の半導体素子
3 第1のアイランド部
7 モールド樹脂
8 リード部
9 ボンディングワイヤ
10 ダミーワイヤ
11 連結部
12 突出部
200 リードフレーム
Claims (8)
- 半導体素子(1、2)を搭載するアイランド部(3)と、前記半導体素子(1)とボンディングワイヤ(9)を介して電気的・機械的に接続されるリード部(8)と、前記アイランド部(3)と前記リード部(8)とを一体に連結する連結部(11)とを備え、
前記アイランド部(3)と当該リードフレームのうち前記アイランド部(3)以外の部位(11)とは、前記ボンディングワイヤ(9)よりも機械的強度の低いダミーワイヤ(10)を介して機械的に接続されているリードフレームであって、
前記アイランド部(3)は矩形板状をなすものであり、前記ダミーワイヤ(10)は、前記アイランド部(3)の四隅部のそれぞれに接続されている複数本のものよりなることを特徴とするリードフレーム。 - 前記四隅部に接続された複数本のダミーワイヤ(10)は、前記アイランド部(3)の中心から放射状に延びるように形成されていることを特徴とする請求項1に記載のリードフレーム。
- 前記ダミーワイヤ(10)のループ高さが前記ボンディングワイヤ(9)のループ高さよりも低くなっていることを特徴とする請求項1または2に記載のリードフレーム。
- アイランド部(3)とリード部(8)とが連結部(11)により一体に連結されてなるリードフレーム(200)を用意し、
前記アイランド部(3)に半導体素子(1、2)を搭載する工程と、
前記半導体素子(1)と前記リード部(8)とをボンディングワイヤ(9)により電気的・機械的に接続する工程とを備える半導体装置の製造方法において、
前記アイランド部(3)と前記リードフレーム(200)のうち前記アイランド部(3)以外の部位(11)とを、前記ボンディングワイヤ(9)よりも機械的強度の低いダミーワイヤ(10)を介して機械的に接続するダミーワイヤ接続工程を備え、
前記アイランド部(3)は矩形板状をなすものであり、前記ダミーワイヤ接続工程では、前記ダミーワイヤ(10)を、前記アイランド部(3)の四隅部のそれぞれに接続することを特徴とする半導体装置の製造方法。 - 前記ダミーワイヤ接続工程では、前記四隅部に接続するダミーワイヤ(10)を、前記アイランド部(3)の中心から放射状に延びるように形成することを特徴とする請求項4に記載の半導体装置の製造方法。
- 前記ダミーワイヤ接続工程では、前記ダミーワイヤ(10)のループ高さが前記ボンディングワイヤ(9)のループ高さよりも低くなるように前記ダミーワイヤ(10)の接続を行うことを特徴とする請求項4または5に記載の半導体装置の製造方法。
- 前記半導体素子(1、2)の搭載工程、前記ボンディングワイヤ(9)の接続工程、および前記ダミーワイヤ(10)の接続工程の後、
前記半導体素子(1、2)、前記アイランド部(3)、前記リード部(8)および前記ボンディングワイヤ(9)をモールド樹脂(7)で封止するとともに、前記連結部(11)は前記モールド樹脂(7)から露出させる工程と、
その後、前記アイランド部(3)および前記リード部(8)から前記連結部(11)を分断する工程とを備え、
前記ダミーワイヤ(10)は、前記アイランド部(3)と前記連結部(11)とを接続するようにし、前記連結部(11)の分断時には、前記ダミーワイヤ(10)のうち前記モールド樹脂(7)から露出する部位を切断することを特徴とする請求項4ないし6のいずれか1つに記載の半導体装置の製造方法。 - 前記半導体素子(1、2)の搭載工程、前記ボンディングワイヤ(9)の接続工程、および前記ダミーワイヤ(10)の接続工程の後、
前記半導体素子(1、2)、前記アイランド部(3)、前記リード部(8)および前記ボンディングワイヤ(9)をモールド樹脂(7)で封止するとともに、前記連結部(11)は前記モールド樹脂(7)から露出させる工程と、
その後、前記アイランド部(3)および前記リード部(8)から前記連結部(11)を分断する工程とを備え、
前記連結部(11)には、前記連結部(11)から前記モールド樹脂(7)の封止領域まで延びる突出部(12)を設けておき、前記ダミーワイヤ(10)は、前記アイランド部(3)と前記突出部(12)とを接続するようにし、
前記連結部(11)の分断時には、前記モールド樹脂(7)で封止されている前記突出部(12)と前記モールド樹脂(7)から露出する前記連結部(11)との間を切断することを特徴とする請求項4ないし6のいずれか1つに記載の半導体装置の製造方法。
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