JP2012212897A - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
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- JP2012212897A JP2012212897A JP2012127848A JP2012127848A JP2012212897A JP 2012212897 A JP2012212897 A JP 2012212897A JP 2012127848 A JP2012127848 A JP 2012127848A JP 2012127848 A JP2012127848 A JP 2012127848A JP 2012212897 A JP2012212897 A JP 2012212897A
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Abstract
【解決手段】封止体2の一面に露出するタブ4,タブ吊りリード及び複数のリード7と、封止体2内に位置しタブ4の表面に接着剤5で固定される半導体素子3と、半導体素子3の電極とリード7を電気的に接続する導電性のワイヤ25と、半導体素子3の電極と半導体素子3から外れたタブ4の表面部分を電気的に接続する導電性のワイヤ25とを有するノンリード型の半導体装置1であって、タブ4はその外周縁が半導体素子3の外周縁よりも外側に位置するように半導体素子3よりも大きくなり、半導体素子3が固定される半導体素子固定領域と、ワイヤ25が接続されるワイヤ接続領域との間の前記タブ4表面には、半導体素子固定領域を囲むように溝20が設けられている。タブ4はその断面が逆台形となり、周縁はパッケージ2内に食い込んでいる。
【選択図】図1
Description
本発明の他の目的は、ダウンボンド接合部の接続の信頼性が高い半導体装置及びノンリード型半導体装置を提供することにある。
本発明の他の目的は、タブ表面とパッケージを構成するレジンとの剥離を防止できる半導体装置及びノンリード型半導体装置を提供することにある。
本発明の他の目的は、半導体素子を搭載するタブと、パッケージを構成するレジンとの密着性が高く耐湿性が高い半導体装置及びノンリード型半導体装置を提供することにある。
本発明の前記ならびにそのほかの目的と新規な特徴は、本明細書の記述および添付図面からあきらかになるであろう。
前記封止体の実装面に裏面を露出しており、前記裏面と反対側の表面に半導体素子固定領域と、ワイヤ接続領域を有しているタブと、
前記封止体の実装面に露出しており、前記タブに連なるタブ吊りリードと、
前記封止体の実装面に裏面を露出する複数のリードと、
前記封止体内に位置し、前記タブの表面に接着剤を介して、裏面が前記タブの表面に対向するように、前記半導体素子固定領域上に固定される半導体素子と、
前記半導体素子の主面上に形成された複数の電極と、
前記複数の電極と前記リードの表面とを電気的に接続する導電性のワイヤと、
前記半導体素子の電極と前記タブのワイヤ接続領域とを電気的に接続する導電性のワイヤとを有する半導体装置であって、
前記タブはその外周縁が前記半導体素子の外周縁よりも外側に位置するように前記半導体素子よりも大きくなり、
前記半導体素子固定領域と、前記ワイヤ接続領域との間の前記タブ表面には溝が設けられていることを特徴とする。
〔実施例1〕
図1乃至図17は本発明の実施例1(実施形態1)である半導体装置、特にノンリード型半導体装置及びその製造方法に係わる図である。本実施形態1では四角形のパッケージの裏面にタブ及びこのタブに連なるタブ吊りリード並びにタブが露出するQFN型の半導体装置に本発明を適用した例について説明する。
(1)タブ4はその外周縁が半導体素子(チップ)3の外周縁よりも外側に位置するようにチップ3よりも大きくなっていることから、チップ3の電極はいずれの位置であっても近くのタブ表面に接続(ダウンボンド)することができる。この場合、チップ3の全周の外側にタブ表面部分が存在することから、ダウンボンドのワイヤ長さも最も短くすることもできる。ダウンボンドは、グランド電極を共通グランドとなるタブ表面に接続するが、チップ3のいずれのグランド電極も近くのタブ表面部分に接続できるため、半導体素子が高周波デバイスである場合、回路のグランド電位の安定化が図れる。
図18及び図19は本発明の実施例2(実施形態2)であるノンリード型半導体装置に係わる図であって、図18はノンリード型半導体装置の模式的断面図、図19はタブの模式的拡大平面図である。
図20は本発明の実施例3(実施形態3)であるノンリード型半導体装置の模式的断面図である。
本実施形態3の半導体装置1は、タブ4の外周部のワイヤ接続領域を除いて搭載するチップ3のチップサイズよりも大きい底が平坦となる窪み50を設けた構成である。この例では、チップ3が窪み50の平坦な底に接着剤5で固定されるため、窪み50の深さと、接着剤5の厚さを選択すれば、チップ3の底面がタブ表面の高さを越えて窪み50の底側に入るようになり、半導体装置1の高さhを実施形態1の半導体装置1の場合の高さHに比べて低くすることができる。
図21乃至図23は本発明の実施例4(実施形態4)であるノンリード型半導体装置に係わる図である。図21は一部を切り欠いた半導体装置の平面図、図22は図21のE−E線に沿う拡大断面図である。
図25は本発明の実施例5(実施形態5)であるノンリード型半導体装置の一部を切り欠いた平面図である。本実施形態5は実施形態4の半導体装置1において、スリット60の両端部分にスリット60からタブ4の外周に向かうスリット61を設けてある。このスリット61はタブ4を貫通する構造となる。従って、このスリット61の先端はタブ4の縁に到達するとワイヤ接続領域が支持されなくなるため、スリット61の先端はタブ4の縁に到達しない構造となる。
なお、前述の熱歪み緩和効果を得るため、タブ4の外周縁から内側に向けてスリットを1乃至複数設けてもよい。
図27は本発明の実施例6(実施形態6)であるノンリード型半導体装置におけるタブの一部を示す斜視図である。本実施形態6ではタブ4の各辺に沿って設けられる半導体素子固定領域とワイヤ接続領域と間のスリット60の両端に前記スリット61に変わって底のある溝70を設ける例である。即ち、スリット60タブ4の外周に向かって溝70が1本乃至複数本設けた例である。
この例では溝70は底が存在することから、スリットとは異なり、タブ4の縁にまで到達してもワイヤ接続領域の支持ができることから特に問題はない。
なお、前述の熱歪み緩和効果を得るため、タブ4の外周縁から内側に向けて溝を1乃至複数設けてもよい。
Claims (10)
- 複数の電極が配置された表面を有する半導体チップと、
前記半導体チップが搭載されたチップボンディング領域とワイヤ接続領域とを有する表面と、前記表面とは反対側の裏面と、を備えた第1金属部材と、
前記第1金属部材の周囲に配置された複数の第2金属部材と、
前記複数の第2金属部材と前記複数の第2金属部材に対応した前記半導体チップの前記複数の電極の一部とをそれぞれ電気的に接続する複数の第1ワイヤと、
前記第1金属部材の前記ワイヤ接続領域と前記ワイヤ接続領域に対応した前記半導体チップの前記複数の電極の一部とを電気的に接続する第2ワイヤと、
上面および前記上面とは反対側の下面を有し、前記半導体チップ、前記第1金属部材の一部、前記複数の第2金属部材の一部、前記複数の第1ワイヤ、および前記第2ワイヤを封止する封止体を有し、
前記第1金属部材はその外周縁が前記半導体チップの外周縁よりも外側に位置するように大きく形成され、
前記第1金属部材の前記チップボンディング領域が位置する部分の前記裏面の一部は前記封止体の前記下面から露出し、
前記第1金属部材の前記表面には窪み部が形成されており、前記窪み部の底面は前記チップボンディング領域であって、かつ前記窪み部より外側の領域は前記ワイヤ接続領域である半導体装置。 - 請求項1に記載の半導体装置において、
前記窪み部の前記底面の面積は、前記半導体チップの平面積よりも大きい半導体装置。 - 請求項1に記載の半導体装置において、
前記第1金属部材の前記窪み部は、封止体の一部が充填されている半導体装置。 - 複数の電極が配置された表面を有する半導体チップと、
前記半導体チップが搭載されたチップボンディング領域とワイヤ接続領域とを有する表面と、前記表面とは反対側の裏面と、を備えた第1金属部材と、
前記第1金属部材の周囲に配置された複数の第2金属部材と、
前記複数の第2金属部材と前記複数の第2金属部材に対応した前記半導体チップの前記複数の電極の一部とをそれぞれ電気的に接続する複数の第1ワイヤと、
前記第1金属部材の前記ワイヤ接続領域と前記ワイヤ接続領域に対応した前記半導体チップの前記複数の電極の一部とを電気的に接続する第2ワイヤと、
上面および前記上面とは反対側の下面を有し、前記半導体チップ、前記第1金属部材の一部、前記複数の第2金属部材の一部、前記複数の第1ワイヤ、および前記第2ワイヤを封止する封止体を有し、
前記第1金属部材はその外周縁が前記半導体チップの外周縁よりも外側に位置するように大きく形成され、
前記第1金属部材の前記チップボンディング領域が位置する部分の前記裏面の一部は前記封止体の前記下面から露出し、
前記第1金属部材の前記表面において、前記ワイヤ接続領域の前記第2ワイヤが接続されている部分の高さは、前記チップボンディング領域の前記半導体チップが搭載されている部分の高さよりも高い半導体装置。 - 請求項1または4に記載の半導体装置において、
前記半導体チップは、前記表面とは反対側の裏面を有し、
前記半導体チップの前記裏面の高さは、前記第1金属部材の前記ワイヤ接続領域の高さよりも低い位置にある半導体装置。 - 請求項1または4に記載の半導体装置において、
前記第1金属部材、および前記複数の第2金属部材は銅を含む半導体装置。 - 請求項6に記載の半導体装置において、
前記第1金属部材はタブであって、前記複数の第2金属部材は複数のリードである半導体装置。 - 請求項1または4に記載の半導体装置において、
前記半導体チップは接着剤を介して前記第1金属部材の前記チップボンディング領域に固定されている半導体装置。 - 請求項8に記載の半導体装置において、
前記接着剤はAgペーストである半導体装置。 - 複数の電極が配置された表面を有する半導体チップと、
前記半導体チップが搭載された表面と、前記表面とは反対側の裏面と、を備えたタブと、
前記タブの周囲に配置された複数のリードと、
前記複数のリードと前記複数のリードに対応した前記半導体チップの前記複数の電極の一部とをそれぞれ電気的に接続する複数のワイヤと、
上面および前記上面とは反対側の下面を有し、前記半導体チップを封止する封止体を有する半導体装置。
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