JP2007311771A - 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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Abstract
【解決手段】その表面上にパッド電極3を有する半導体基板1を準備する。次に、半導体基板1の裏面から表面方向にエッチングし、パッド電極3を露出させるビアホール8を形成する。次に、スパッタリング法またはPVD法、及び逆スパッタリング(エッチング)によりビアホール8内に第1のバリア層11を形成する。この逆スパッタリングによりビアホール8底部のバリア層が除去され、パッド電極3が露出される。次に、ビアホール内で露出したパッド電極3上に第2のバリア層12を形成する。第2のバリア層12の膜厚のみを調節することでビア抵抗を制御する。
【選択図】図7
Description
4 パッシベーション膜 5 接着層 6 支持体 7 レジスト層
8 ビアホール 9 第2の絶縁膜 10 バリア層 11 第1のバリア層
12 第2のバリア層 15 シード層 16 貫通電極 17 配線層
18 レジスト層 19 保護層 20 導電端子 30 絶縁膜
41 半導体基板 42 エピタキシャル層 43 P型拡散層
44 トレンチ溝 45 ゲート絶縁膜 46 ゲート電極 47 ソース層
48 ボディ層 49 ソース電極 50 ドレイン端子 51 ゲート端子
52 絶縁膜 53 レジスト層 54a,54b 開口部
55a,55b,55c,55d,55e,55f,55g ビアホール
56 ドレイン電極 60 MOSトランジスタ 100 半導体基板
101 パッド電極 102 ビアホール 103 第1の絶縁膜
104 パッシベーション膜 105 接着層 106 ガラス基板
107 第2の絶縁膜 108 バリア層
Claims (17)
- その表面上に下層導電体を有する半導体基板を準備し、
前記半導体基板の裏面から表面方向に前記半導体基板を除去して、前記下層導電体を露出させるビアホールを形成する工程と、
スパッタリング法またはPVD法により前記ビアホール内に第1のバリア層を形成する工程と、
逆スパッタリングを行い、前記ビアホールの底部に堆積した前記第1のバリア層を部分的に除去することで前記下層導電体の表面を露出させる工程と、
前記ビアホール底部で露出した前記下層導電体上に第2のバリア層を形成する工程と、
前記ビアホール内であって、前記第2バリア層上に貫通電極を形成し、
前記貫通電極を介して前記下層導電体と電気的に接続される上層導電体を前記半導体基板の裏面上に形成する工程とを有することを特徴とする半導体装置の製造方法。 - ビアホールを形成する工程を有する半導体装置の製造方法であって、
スパッタリング法またはPVD法により前記ビアホール内に第1のバリア層を形成する工程と、
逆スパッタリングを行い、前記ビアホールの底部に堆積した前記第1のバリア層を部分的に除去する工程と、
前記ビアホールの底部に第2のバリア層を形成する工程と、
前記ビアホール内に貫通電極を形成する工程とを有することを特徴とする半導体装置の製造方法。 - 前記第2のバリア層を形成する工程はスパッタリング法またはPVD法により行われることを特徴とする請求項1または請求項2に記載の半導体装置の製造方法。
- 前記第2のバリア層上に、前記貫通電極をメッキ形成するためのシード層を形成する工程を有することを特徴とする請求項1乃至請求項3のいずれかに記載の半導体装置の製造方法。
- 前記シード層を形成する工程は、
前記第2のバリア層上にシード層を形成する工程と、その後前記第2のバリア層上のシード層を逆スパッタリングする工程を有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。 - 前記第2のバリア層を形成する工程は、前記第1及び前記第2のバリア層を含めたバリア層全体として、前記ビアホール底部の膜厚が、前記ビアホール側壁の膜厚に比して同じか薄くなるように行うことを特徴とする請求項1乃至請求項5のいずれかに記載の半導体装置の製造方法。
- 前記半導体基板の表面上に支持体を貼り付ける工程を有することを特徴とする請求項1乃至請求項6のいずれかに記載の半導体装置の製造方法。
- 前記第2のバリア層は前記第1のバリア層と異なる材料を含むことを特徴とする請求項1乃至請求項7のいずれかに記載の半導体装置の製造方法。
- 前記第2のバリア層は積層構造であることを特徴とする請求項1乃至請求項8のいずれかに記載の半導体装置の製造方法。
- 半導体基板を介して設けられた下層導電体及び上層導電体と、前記下層導電体と前記上層導電体とを電気的に接続するためのビアホールと、
前記ビアホール内に形成されたバリア層と、
前記ビアホール内であって、前記バリア層上に形成された貫通電極とを有し、
前記バリア層は、前記ビアホール内にスパッタリング工程またはPVD工程、及び逆スパッタリング工程によって前記ビアホールの側壁に形成された第1のバリア層と、
前記第1のバリア層とは別工程で形成され、前記ビアホールの底部に形成された第2のバリア層とから成ることを特徴とする半導体装置。 - ビアホールを有する半導体装置であって、
前記ビアホール内に形成されたバリア層と、
前記ビアホール内であって、前記バリア層上に形成された貫通電極とを有し、
前記バリア層は、前記ビアホール内にスパッタリング工程またはPVD工程、及び逆スパッタリング工程によって前記ビアホールの側壁に形成された第1のバリア層と、
前記第1のバリア層とは別工程で形成され、前記ビアホールの底部に形成された第2のバリア層とから成ることを特徴とする半導体装置。 - 前記第2のバリア層上にシード層が形成されていることを特徴とする請求項10または請求項11に記載の半導体装置。
- 前記第1及び前記第2のバリア層を含めたバリア層全体として、前記ビアホール底部の膜厚が、前記ビアホール側壁の膜厚に比して同じか薄いことを特徴とする請求項10乃至請求項12のいずれかに記載の半導体装置。
- 前記半導体基板のいずれかの主面に支持体が貼り付けられていることを特徴とする請求項10乃至請求項13のいずれかに記載の半導体装置。
- 前記第2のバリア層は前記第1のバリア層と異なる材料を含むことを特徴とする請求項10乃至請求項14のいずれかに記載の半導体装置。
- 前記第2のバリア層は積層構造であることを特徴とする請求項10乃至請求項15のいずれかに記載の半導体装置。
- 半導体基板をその厚み方向の途中まで除去してビアホールを形成する工程と、
スパッタリング法またはPVD法により前記ビアホール内に第1のバリア層を形成する工程と、
逆スパッタリングを行い、前記ビアホールの底部に堆積した前記第1のバリア層を部分的に除去し、前記ビアホールの底部で前記半導体基板を露出させる工程と、
前記ビアホールの底部で露出した前記半導体基板上に第2のバリア層を形成する工程と、
前記ビアホール内に前記第2のバリア層と電気的に接続された電極を形成する工程とを有することを特徴とする半導体装置の製造方法。
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US11/785,909 US8169054B2 (en) | 2006-04-21 | 2007-04-20 | Semiconductor device and method of manufacturing the same |
EP07008082A EP1848031A1 (en) | 2006-04-21 | 2007-04-20 | Semiconductor device and method of manufacturing the same |
KR1020070038811A KR100886305B1 (ko) | 2006-04-21 | 2007-04-20 | 반도체 장치 및 그 제조 방법 |
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US20070249163A1 (en) | 2007-10-25 |
TW200741972A (en) | 2007-11-01 |
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EP1848031A1 (en) | 2007-10-24 |
CN101154577B (zh) | 2011-06-22 |
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US8169054B2 (en) | 2012-05-01 |
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