JP5183708B2 - 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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- JP5183708B2 JP5183708B2 JP2010211078A JP2010211078A JP5183708B2 JP 5183708 B2 JP5183708 B2 JP 5183708B2 JP 2010211078 A JP2010211078 A JP 2010211078A JP 2010211078 A JP2010211078 A JP 2010211078A JP 5183708 B2 JP5183708 B2 JP 5183708B2
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- Prior art keywords
- insulating film
- substrate
- semiconductor device
- opening
- electrode
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Description
前記第1基板の前記主面に第1絶縁膜が形成され、
前記第1絶縁膜の第1領域に形成された第1バンプ開口部の内部に前記第1電極が形成され、
前記第1絶縁膜の第2領域に形成された第1溝開口部の内部に、前記第1電極と同一の材料で構成された第1導電膜が形成され、
前記第1電極の表面の高さは、前記第1絶縁膜の表面の高さと同一であり、
前記第1導電膜の表面には、その表面の高さが前記第1絶縁膜の表面の高さよりも低い窪みが形成され、
前記第1溝開口部の端部は、前記第1基板の外周部まで延在しているものである。
11 感光性樹脂膜
12 配線
13 バンプ開口部
14 溝開口部
15 バリア金属膜
16 Cuシード膜
17 Cu膜
20 バンプ電極
21 埋め込み導電膜
22 窪み
23 空洞
24 貫通電極
30A、30B シリコンウエハ
31 バンプ電極
32 樹脂
33 溝
34 空洞
Claims (23)
- 一面に第1電極が形成された第1基板と、一面に第2電極が形成された第2基板とを積層し、前記第1基板の前記一面と前記第2基板の前記一面とを接着することによって、前記第1電極と前記第2電極とを電気的に接続した半導体装置であって、
前記第1基板の前記一面に第1絶縁膜が形成され、
前記第1絶縁膜の第1領域に形成された第1バンプ開口部の内部に前記第1電極が形成され、
前記第1絶縁膜の第2領域に形成された第1溝開口部の内部に、前記第1電極と同一の材料で構成された第1導電膜が形成され、
前記第1電極の表面の高さは、前記第1絶縁膜の表面の高さと同一であり、
前記第1導電膜の表面には、その表面の高さが前記第1絶縁膜の表面の高さよりも低い窪みが形成され、
前記第1溝開口部の端部は、前記第1基板の外周部まで延在していることを特徴とする半導体装置。 - 前記第1基板は、半導体ウエハまたは半導体チップであることを特徴とする請求項1記載の半導体装置。
- 前記第1溝開口部は、前記半導体ウエハのスクライブラインに沿って格子状に形成されていることを特徴とする請求項2記載の半導体装置。
- 前記第1溝開口部の幅は、前記第1バンプ開口部の直径よりも大きいことを特徴とする請求項1記載の半導体装置。
- 前記第1絶縁膜は、感光性樹脂からなることを特徴とする請求項1記載の半導体装置。
- 前記第2基板の前記一面に第2絶縁膜が形成され、
前記第2絶縁膜の第1領域に形成された第2バンプ開口部の内部に前記第2電極が形成され、
前記第2絶縁膜の第2領域に形成された第2溝開口部の内部に、前記第2電極と同一の材料で構成された第2導電膜が形成され、
前記第2電極の表面の高さは、前記第2絶縁膜の表面の高さと同一であり、
前記第2導電膜の表面には、その表面の高さが前記第2絶縁膜の表面の高さよりも低い窪みが形成され、
前記第2溝開口部の端部は、前記第2基板の外周部まで延在していることを特徴とする請求項1記載の半導体装置。 - 前記第2溝開口部の幅は、前記第2バンプ開口部の直径よりも大きいことを特徴とする請求項6記載の半導体装置。
- 前記第2絶縁膜は、感光性樹脂からなることを特徴とする請求項6記載の半導体装置。
- 前記第2基板の前記第2電極は、前記第2基板の前記一面から他面に貫通する貫通電極であることを特徴とする請求項1記載の半導体装置。
- 前記第2基板は、配線基板であることを特徴とする請求項1記載の半導体装置。
- 一面に第1電極が形成された第1基板と、一面に第2電極が形成された第2基板とを積層し、前記第1基板の前記一面と前記第2基板の前記一面とを接着することによって、前記第1電極と前記第2電極とを電気的に接続する半導体装置の製造方法であって、
前記第1基板の前記一面に前記第1電極を形成する工程は、
(a)前記第1基板の前記一面に第1絶縁膜を形成する工程、
(b)前記第1絶縁膜の第1領域に第1バンプ開口部を形成し、前記第1絶縁膜の第2領域に、その端部が前記第1基板の外周部まで延在する第1溝開口部を形成する工程、
(c)前記第1絶縁膜の上面と、前記第1バンプ開口部および前記第1溝開口部のそれぞれ内部とに、前記第1バンプ開口部の内部を完全に埋め込み、かつ前記第1溝開口部の内部を完全に埋め込まないような膜厚を有する第1導電膜を形成する工程、
(d)化学的機械研磨法を用い、前記第1バンプ開口部に埋め込まれた前記第1導電膜の上面と、前記第1絶縁膜の上面との間に段差がなくなるまで前記第1導電膜を研磨することによって、前記第1バンプ開口部の内部に前記第1導電膜からなる前記第1電極を形成する工程、
を含み、
前記(d)工程では、前記第1溝開口部に埋め込まれた前記第1導電膜の表面に、その表面の高さが前記第1絶縁膜の表面の高さよりも低い窪みが形成されることを特徴とする半導体装置の製造方法。 - 前記第1基板は、半導体ウエハまたは半導体チップであることを特徴とする請求項11記載の半導体装置の製造方法。
- 前記第1溝開口部は、前記半導体ウエハのスクライブラインに沿って格子状に形成されていることを特徴とする請求項12記載の半導体装置の製造方法。
- 前記第1溝開口部の幅は、前記第1バンプ開口部の直径よりも大きいことを特徴とする請求項11記載の半導体装置の製造方法。
- 前記第1絶縁膜は、感光性樹脂からなることを特徴とする請求項11記載の半導体装置の製造方法。
- 前記第2基板の前記一面に前記第2電極を形成する工程は、
(a)前記第2基板の前記一面に第2絶縁膜を形成する工程、
(b)前記第2絶縁膜の第1領域に第2バンプ開口部を形成し、前記第2絶縁膜の第2領域に、その端部が前記第2基板の外周部まで延在する第2溝開口部を形成する工程、
(c)前記第2絶縁膜の上面と、前記第2バンプ開口部および前記第2溝開口部のそれぞれ内部とに、前記第2バンプ開口部の内部を完全に埋め込み、かつ前記第2溝開口部の内部を完全に埋め込まないような膜厚を有する第2導電膜を形成する工程、
(d)化学的機械研磨法を用い、前記第2バンプ開口部に埋め込まれた前記第2導電膜の上面と、前記第2絶縁膜の上面との間に段差がなくなるまで前記第2導電膜を研磨することによって、前記第2バンプ開口部の内部に前記第2導電膜からなる前記第2電極を形成する工程、
を含み、
前記(d)工程では、前記第2溝開口部に埋め込まれた前記第2導電膜の表面に、その表面の高さが前記第2絶縁膜の表面の高さよりも低い窪みが形成されることを特徴とする請求項11記載の半導体装置の製造方法。 - 前記第2溝開口部の幅は、前記第2バンプ開口部の直径よりも大きいことを特徴とする請求項16記載の半導体装置の製造方法。
- 前記第2絶縁膜は、感光性樹脂からなることを特徴とする請求項16記載の半導体装置の製造方法。
- 半導体基板の一面に第1絶縁膜が形成され、
前記第1絶縁膜の第1領域に形成された第1バンプ開口部の内部に第1電極が形成され、
前記第1絶縁膜の第2領域に形成された第1溝開口部の内部に、前記第1電極と同一の材料で構成された第1導電膜が形成され、
前記第1電極の表面の高さは、前記第1絶縁膜の表面の高さと同一であり、
前記第1導電膜の表面には、その表面の高さが前記第1絶縁膜の表面の高さよりも低い窪みが形成され、
前記第1溝開口部の端部は、前記半導体基板の外周部まで延在していることを特徴とする半導体装置。 - 前記第1溝開口部の幅は、前記第1バンプ開口部の直径よりも大きいことを特徴とする請求項19記載の半導体装置。
- (a)半導体基板の一面に第1絶縁膜を形成する工程、
(b)前記第1絶縁膜の第1領域に第1バンプ開口部を形成し、前記第1絶縁膜の第2領域に、その端部が前記半導体基板の外周部まで延在する第1溝開口部を形成する工程、
(c)前記第1絶縁膜の上面と、前記第1バンプ開口部および前記第1溝開口部のそれぞれ内部とに、前記第1バンプ開口部の内部を完全に埋め込み、かつ前記第1溝開口部の内部を完全に埋め込まないような膜厚を有する第1導電膜を形成する工程、
(d)化学的機械研磨法を用い、前記第1バンプ開口部に埋め込まれた前記第1導電膜の上面と、前記第1絶縁膜の上面との間に段差がなくなるまで前記第1導電膜を研磨することによって、前記第1バンプ開口部の内部に前記第1導電膜からなる第1電極を形成する工程、
を含み、
前記(d)工程では、前記第1溝開口部に埋め込まれた前記第1導電膜の表面に、その表面の高さが前記第1絶縁膜の表面の高さよりも低い窪みが形成されることを特徴とする半導体装置の製造方法。 - 前記第1溝開口部の幅は、前記第1バンプ開口部の直径よりも大きいことを特徴とする請求項21記載の半導体装置の製造方法。
- 前記第1絶縁膜は、感光性樹脂からなることを特徴とする請求項21記載の半導体装置の製造方法。
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