JP3880600B2 - 半導体装置およびその製造方法 - Google Patents
半導体装置およびその製造方法 Download PDFInfo
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Description
また本発明の半導体装置は、電極パッドと、前記電極パッドの周縁部を覆う保護膜と、前記電極パッド上方に形成された金属突起電極とからなる入出力パッドを備えた半導体装置であって、前記電極パッドは半導体基板の端部に沿って配置され、前記電極パッドよりも基板内側に前記電極パッドに近接して配線が配置され、前記配線は前記保護膜によって覆われており、前記金属突起電極の全ての周縁が、前記配列された電極パッドおよび配線の最外端部とその外側の半導体基板表面との段差に基づいて前記保護膜の表面に形成された傾斜部よりも内側に位置し、かつ、前記金属突起電極の全ての周縁が、前記電極パッドおよび前記配線の上に位置していることを特徴とする。
また本発明の半導体装置の製造方法は、電極パッドと、前記電極パッドの周縁部を覆う保護膜と、前記電極パッド上方に形成された金属突起電極とからなる入出力パッドを備えた半導体装置の製造方法であって、半導体基板上の端部に沿って前記電極パッドを配置する工程と、前記電極パッドよりも基板内側に前記電極パッドに近接して配線を配置する工程と、前記電極パッドの周縁部と前記配線とを覆うように前記保護膜を形成する工程と、前記電極パッドおよび前記配線の上方に前記金属突起電極を形成する工程とを有し、前記金属突起電極はその全ての周縁が、前記配列された電極パッドおよび配線の最外端部とその外側の半導体基板表面との段差に基づいて前記保護膜の表面に形成された傾斜部よりも内側に位置し、かつ、前記金属突起電極の全ての周縁が、前記電極パッドおよび前記配線の上に位置するように形成することを特徴とする。
図1は本発明の一実施形態における半導体装置の入出力パッド部分の構造を示す断面図、図2は同入出力パッド部分の平面図である。入出力パッドは一般に、半導体装置(半導体チップ)において、トランジスタ、抵抗、キャパシタ、ダイオードや配線等、半導体素子が形成され内部回路が構成されている能動領域の外側、半導体基板の周縁領域に位置している(図10参照)。
図3(a)に示すように、半導体素子形成済みの半導体基板1に電極パッド2および配線6をスパッタやCVD技術などにより形成する。電極パッド2および配線6の材料としてはアルミニウムや銅を主成分とする導電体を好適に使用できる。
電極パッド2と配線とで受けるので、電極パッド2の下方の能動領域7への影響も少ない。
詳細には、2個の電極パッド2A,2Bの間に、その対向した各辺に沿う方向に伸びる配線6bを配置し、一方の電極パッド2Aの残りの3辺を囲むように複数の配線6を配置し、もう一方の電極パッド2Bの残りの2辺に沿う配線6を配置している。
上記したように傾斜部4cどうし連なる場合には段差は比較的小さくなり、金属突起電極3の凸部7には顕著な凹凸は形成されにくい。
配線を、電極パッドを囲んで連続して形成することで、配線の不連続箇所がないぶん、金属突起電極の表面の平坦度を高くできる。
1a 半導体基板端部
2 電極パッド
2a 電極パッドの保護膜開口部からの露出部
3 金属突起電極
3a 凸部
4 保護膜
4a 開口部
4b 傾斜部
4c 傾斜部
4d 開口部
5 バリアメタル層
6 配線
2A,2B 電極パッド
Claims (10)
- 電極パッドと、前記電極パッドの周縁部を覆う保護膜と、前記電極パッド上方に形成された金属突起電極とからなる入出力パッドを備えた半導体装置であって、
前記電極パッドの周囲に前記電極パッドに近接して1または複数本の配線が配置され、前記配線は前記保護膜によって覆われており、
前記金属突起電極の全ての周縁が、前記配列された電極パッドおよび配線の最外端部とその外側の半導体基板表面との段差に基づいて前記保護膜の表面に形成された傾斜部よりも内側に位置し、かつ、前記金属突起電極の全ての周縁が、前記配線の上、または、前記電極パッドおよび前記配線の上に位置していることを特徴とする半導体装置。 - 電極パッドと、前記電極パッドの周縁部を覆う保護膜と、前記電極パッド上方に形成された金属突起電極とからなる入出力パッドを備えた半導体装置であって、
前記電極パッドは半導体基板の端部に沿って配置され、前記電極パッドよりも基板内側に前記電極パッドに近接して配線が配置され、前記配線は前記保護膜によって覆われており、
前記金属突起電極の全ての周縁が、前記配列された電極パッドおよび配線の最外端部とその外側の半導体基板表面との段差に基づいて前記保護膜の表面に形成された傾斜部よりも内側に位置し、かつ、前記金属突起電極の全ての周縁が、前記電極パッドおよび前記配線の上に位置していることを特徴とする半導体装置。 - 複数個の電極パッドの周囲に配線が形成され、前記複数個の電極パッド上方に1の金属突起電極が形成されていることを特徴とする請求項1に記載の半導体装置。
- 電極パッドもしくは配線の1端辺が、これらがその上に形成されている半導体基板の1辺に対向していることを特徴とする請求項1に記載の半導体装置。
- 電極パッドの全周を囲むように配線が配置されていることを特徴とする請求項1に記載の半導体装置。
- 電極パッドと、前記電極パッドの周縁部を覆う保護膜と、前記電極パッド上方に形成された金属突起電極とからなる入出力パッドを備えた半導体装置の製造方法であって、
半導体基板上に前記電極パッドを配置する工程と、前記電極パッドの周囲に前記電極パッドに近接して1または複数本の配線を配置する工程と、前記電極パッドの周縁部と前記配線とを覆うように前記保護膜を形成する工程と、前記電極パッドおよび前記配線の上方に前記金属突起電極を形成する工程とを有し、
前記金属突起電極はその全ての周縁が、前記配列された電極パッドおよび配線の最外端部とその外側の半導体基板表面との段差に基づいて前記保護膜の表面に形成された傾斜部よりも内側に位置し、かつ、前記金属突起電極の全ての周縁が、前記配線の上、または、前記電極パッドおよび前記配線の上に位置するように形成することを特徴とする半導体装置の製造方法。 - 電極パッドと、前記電極パッドの周縁部を覆う保護膜と、前記電極パッド上方に形成された金属突起電極とからなる入出力パッドを備えた半導体装置の製造方法であって、
半導体基板上の端部に沿って前記電極パッドを配置する工程と、前記電極パッドよりも基板内側に前記電極パッドに近接して配線を配置する工程と、前記電極パッドの周縁部と前記配線とを覆うように前記保護膜を形成する工程と、前記電極パッドおよび前記配線の上方に前記金属突起電極を形成する工程とを有し、
前記金属突起電極はその全ての周縁が、前記配列された電極パッドおよび配線の最外端部とその外側の半導体基板表面との段差に基づいて前記保護膜の表面に形成された傾斜部よりも内側に位置し、かつ、前記金属突起電極の全ての周縁が、前記電極パッドおよび前記配線の上に位置するように形成することを特徴とする半導体装置の製造方法。 - 複数個の電極パッドの周囲に配線を形成し、前記複数個の電極パッド上方に1の金属突起電極を形成することを特徴とする請求項6に記載の半導体装置の製造方法。
- 電極パッドもしくは配線の1端辺を半導体基板の1辺に対向させて形成することを特徴とする請求項6に記載の半導体装置の製造方法。
- 電極パッドの全周を囲むように配線を配置することを特徴とする請求項6に記載の半導体装置の製造方法。
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