JP2012004505A - 半導体装置及びその製造方法 - Google Patents
半導体装置及びその製造方法 Download PDFInfo
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- JP2012004505A JP2012004505A JP2010140940A JP2010140940A JP2012004505A JP 2012004505 A JP2012004505 A JP 2012004505A JP 2010140940 A JP2010140940 A JP 2010140940A JP 2010140940 A JP2010140940 A JP 2010140940A JP 2012004505 A JP2012004505 A JP 2012004505A
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- layer
- wiring layer
- insulating layer
- via hole
- forming
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Abstract
【解決手段】バンプ電極18を備えた半導体基板10aと、半導体基板10aの上に形成され、バンプ電極18の横方向に配置された第1絶縁層20と、第1絶縁層20の上に形成され、バンプ電極18に接続された第1配線層30と、第1配線層30の上に形成された第2絶縁層22と、第2絶縁層22に形成され、第1配線層30に到達するビアホールVHと、第2絶縁層22の上に形成され、ビアホールVHに形成されたビア導体40を介して第1配線層30に接続される第2配線層32と、第2配線層32に接続された外部接続端子34とを含み、第2絶縁層22の弾性率は第1絶縁層20の弾性率より低く設定されている。
【選択図】図14
Description
Claims (9)
- バンプ電極を備えた半導体基板と、
前記半導体基板の上に形成され、前記バンプ電極の横方向に配置された第1絶縁層と、
前記第1絶縁層の上に形成され、前記バンプ電極に接続された第1配線層と、
前記第1配線層の上に形成された第2絶縁層と、
前記第2絶縁層に形成され、前記第1配線層に到達するビアホールと、
前記第2絶縁層の上に形成され、前記ビアホールに形成されたビア導体を介して前記第1配線層に接続される第2配線層と、
前記第2配線層に接続された外部接続端子とを有し、
前記第2絶縁層の弾性率は前記第1絶縁層の弾性率より低いことを特徴とする半導体装置。 - 前記第2配線層は、前記ビアホールの外周から外側に延在して形成され、
前記ビア導体は導電性ペースト又ははんだから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。 - 前記ビア導体は、前記ビアホールに充填されていると共に、前記ビアホールの近傍の前記第2配線層を被覆して形成されていることを特徴とする請求項2に記載の半導体装置。
- 前記第2配線層は、銅箔から形成されることを特徴とする請求項2又は3に記載の半導体装置。
- バンプ電極を備えた半導体ウェハの上に、前記バンプ電極の上面が露出するように第1絶縁層を形成する工程と、
前記第1絶縁層の上に、前記バンプ電極に接続される第1配線層を形成する工程と、
前記第1配線層の上に第2絶縁層及び第2配線層が順に形成され、前記第2配線層が前記第2絶縁層に形成されたビアホールを介して前記第1配線層に接続された層間接続構造を形成する工程と、
前記第2配線層に接続される外部接続端子を形成する工程とを有し、
前記第2絶縁層の弾性率は前記第1絶縁層の弾性率より低く設定されることを特徴とする半導体装置の製造方法。 - 前記層間接続構造を形成する工程は、
前記第1配線層の上に、前記第2絶縁層の上に金属層が積層された積層膜を形成する工程と、
前記積層膜の上に、前記第1配線層の接続部に対応する部分に開口部が設けられたレジストを形成する工程と、
前記レジストの開口部を通して前記金属層をエッチングすることにより前記金属層に開口部を形成する工程と、
ウェットブラスト法により、前記金属層の開口部を通して前記第2絶縁層をエッチングすることにより、前記第1配線層に到達する前記ビアホールを形成する工程と、
前記ビアホールに導電性ペースト又ははんだからなるビア導体を形成することにより、前記第1配線層と前記金属層とを前記ビア導体で接続する工程と、
前記ビアホールを形成する工程の後、又は前記ビア導体を形成する工程の後に行われ、前記金属層をパターニングして前記第2配線層を形成する工程とを含むことを特徴とする半導体装置の製造方法。 - 前記導電性ペーストは、ディスペンス法又はインクジェット法によって前記ビアホールに選択的に形成されるか、あるいはフォトリソグラフィに基づいて感光性の前記導電性ペーストが前記ビアホールに選択的に形成され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。
- 前記ビア導体を形成する工程において、
前記ビア導体は前記ビアホールに充填されると共に、前記ビアホールの近傍の前記第2配線層を被覆して形成され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。 - 前記ビアホールを形成する工程において、
前記レジストは、前記ウェットブラスト法で前記絶縁層をエッチングする途中で消失し、前記金属層の表面が前記ウェットブラスト法によって粗化され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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