JP4400492B2 - 電子装置 - Google Patents
電子装置 Download PDFInfo
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- JP4400492B2 JP4400492B2 JP2005085406A JP2005085406A JP4400492B2 JP 4400492 B2 JP4400492 B2 JP 4400492B2 JP 2005085406 A JP2005085406 A JP 2005085406A JP 2005085406 A JP2005085406 A JP 2005085406A JP 4400492 B2 JP4400492 B2 JP 4400492B2
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- lead terminal
- bonding wire
- lead
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Description
図1は、本発明の第1実施形態に係る電子装置としてのリードフレームを用いたQFNパッケージ(Quad Flat Non−Leaded Package)構造を有する電子装置100の構成を示す図であり、(a)は同電子装置100の概略平面図、(b)は、(a)中のB−B一点鎖線に沿った概略断面図である。
図1に示されるように、本電子装置100におけるリードフレーム10は、アイランド11とアイランド11の周囲に位置するリード端子12とを備えている。このリードフレーム10は、Cuや42アロイなどの通常のリードフレーム材料からなるものであり、プレス加工やエッチング加工などにより形成することができる。
次に、このリードフレームを用いたQFNパッケージ構造を有する電子装置100の製造方法について、図2、図3も参照して述べる。図2、図3は、本電子装置100の製造方法を示す工程図である。
ところで、本実施形態によれば、一面20aがボンディングワイヤ30接続用の面となっている電子部品としての半導体素子20と、半導体素子20の周囲に位置する複数個のリード端子12とを備え、半導体素子20の一面20aと各々のリード端子12とがボンディングワイヤ30により電気的に接続されている電子装置において、次のような点を特徴とする電子装置100が提供される。
上記図2および上記図3に示される製造方法においては、エッチングを行うことによって、第2のリード端子12bのうちボンディングワイヤ30が接続される部位を、第1のリード端子12aのうちボンディングワイヤ30が接続される部位よりも薄い薄肉部としていた。
次に、図5(b)、(c)に示されるように、このリードフレーム素材10bに対してアイランド11やリード端子12を形成するための感光性樹脂などからなるマスクM2を、フォト工程などにより形成し、エッチング加工を行う。それによって、アイランド11およびリード端子12、さらには、上記薄肉部が形成されたリードフレーム10が形成される。
図7は、本発明の第2実施形態に係る電子装置としてのQFNパッケージ構造を有する電子装置200の概略断面図である。
図10は、本第2実施形態の変形例としてのQFNパッケージ構造を有する電子装置を示す概略断面図である。
図13は、本発明の参考形態に係る電子装置としてのQFNパッケージ構造を有する電子装置300の概略断面図である。
図16は、本発明の他の実施形態に係る電子装置としてのQFNパッケージ構造を有する電子装置の概略断面図である。
14…導電性部材としてのメッキ膜、15…導電性部材としてのバンプ、
20…電子部品としての半導体素子、20a…半導体素子の一面、
30…ボンディングワイヤ、
30a…第1のリード端子に接続されたボンディングワイヤのうちリード端子との接続部、
30b…第2のリード端子に接続されたボンディングワイヤのうちリード端子との接続部、
40…モールド樹脂。
Claims (5)
- 一面(20a)がボンディングワイヤ(30)接続用の面となっている電子部品(20)と、
前記電子部品(20)の周囲に位置する複数個のリード端子(12)とを備え、
前記電子部品(20)の一面(20a)と各々の前記リード端子(12)とが前記ボンディングワイヤ(30)により電気的に接続されている電子装置において、
前記複数個のリード端子(12)のうち第1のリード端子(12a)に接続された前記ボンディングワイヤ(30)が前記電子部品(20)の一面(20a)と直交する方向において重なる位置に存在するものを、第2のリード端子(12b)としたとき、
前記第2のリード端子(12b)のうち前記ボンディングワイヤ(30)が接続される部位を、前記第1のリード端子(12a)のうち前記ボンディングワイヤ(30)が接続される部位よりも薄くすることにより、
前記電子部品(20)の一面(20a)と直交する方向において、前記第2のリード端子(12b)のうち前記ボンディングワイヤ(30)が接続される部位が、前記第1のリード端子(12a)のうち前記ボンディングワイヤ(30)が接続される部位よりも低くなっており、
前記電子部品(20)の一面(20a)と直交する方向において、前記第2のリード端子(12b)に接続された前記ボンディングワイヤ(30)のうち当該リード端子との接続部(30b)寄りの部位が、前記第1のリード端子(12a)に接続された前記ボンディングワイヤ(30)のうち当該リード端子との接続部(30a)寄りの部位よりも低くなっていることを特徴とする電子装置。 - 一面(20a)がボンディングワイヤ(30)接続用の面となっている電子部品(20)と、
前記電子部品(20)の周囲に位置する複数個のリード端子(12)とを備え、
前記電子部品(20)の一面(20a)と各々の前記リード端子(12)とが前記ボンディングワイヤ(30)により電気的に接続されている電子装置において、
前記複数個のリード端子(12)のうち第1のリード端子(12a)に接続された前記ボンディングワイヤ(30)が前記電子部品(20)の一面(20a)と直交する方向において重なる位置に存在するものを、第2のリード端子(12b)としたとき、
前記第1のリード端子(12a)のうち前記ボンディングワイヤ(30)が接続される部位には、別体の導電性部材(14、15)が取り付けられることにより、
前記電子部品(20)の一面(20a)と直交する方向において、前記第2のリード端子(12b)に接続された前記ボンディングワイヤ(30)のうち当該リード端子との接続部(30b)が、前記第1のリード端子(12a)に接続された前記ボンディングワイヤ(30)のうち当該リード端子との接続部(30a)よりも低くなっており、
前記電子部品(20)の一面(20a)と直交する方向において、前記第2のリード端子(12b)に接続された前記ボンディングワイヤ(30)のうち当該リード端子との接続部(30b)寄りの部位が、前記第1のリード端子(12a)に接続された前記ボンディングワイヤ(30)のうち当該リード端子との接続部(30a)寄りの部位よりも低くなっていることを特徴とする電子装置。 - 前記電子部品(20)の一面(20a)と直交する方向において、前記第2のリード端子(12b)に接続された前記ボンディングワイヤ(30)のうち当該リード端子との接続部(30b)が、前記第1のリード端子(12a)に接続された前記ボンディングワイヤ(30)のうち当該リード端子との接続部(30a)よりも低くなっていることを特徴とする請求項1に記載の電子装置。
- 前記複数個のリード端子(12)は、前記電子部品(20)の一面(20a)との距離が異なるものからなり、
前記第1のリード端子(12a)は、前記電子部品(20)の一面(20a)に対して比較的遠いものであり、前記第2のリード端子(12b)は、前記電子部品(20)の一面(20a)に対して比較的近いものであることを特徴とする請求項1ないし3のいずれか1つに記載の電子装置。 - 前記電子部品(20)、前記ボンディングワイヤ(30)および前記リード端子(12)がモールド樹脂(40)によって封止されており、
前記リード端子(12)の一部が前記モールド樹脂(40)から露出していることを特徴とする請求項1ないし4のいずれか1つに記載の電子装置。
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