JP6639141B2 - 半導体装置の製造方法および半導体装置 - Google Patents
半導体装置の製造方法および半導体装置 Download PDFInfo
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- JP6639141B2 JP6639141B2 JP2015155138A JP2015155138A JP6639141B2 JP 6639141 B2 JP6639141 B2 JP 6639141B2 JP 2015155138 A JP2015155138 A JP 2015155138A JP 2015155138 A JP2015155138 A JP 2015155138A JP 6639141 B2 JP6639141 B2 JP 6639141B2
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Description
ここでは、バリア膜の第1例として、スパッタ法によってパラジウム(Pd)膜を形成する場合について説明する。
ここでは、バリア膜の第2例として、スパッタ法によってルテニウム(Ru)膜を形成する場合について説明する。なお、図2等に示される半導体装置と同一部材には同一符号を付し、必要である場合を除きその説明を繰り返さないこととする。
ここでは、バリア膜の形成方法のバリエーションとして、電解めっきによってパラジウム(Pd)膜を形成する場合について説明する。なお、図2等に示される半導体装置と同一部材には同一符号を付し、必要である場合を除きその説明を繰り返さないこととする。
ここでは、外部との電気的な接続を図る接続部材のバリエーションとして、ワイヤをボンディングする場合について説明する。なお、主たる製造工程は、実施の形態1において説明した製造工程をベースにする。また、図2等に示される半導体装置と同一部材には同一符号を付し、必要である場合を除きその説明を繰り返さないこととする。
以上、本発明者によってなされた発明を実施の形態に基づき具体的に説明したが、本発明は前記実施の形態に限定されるものではなく、その要旨を逸脱しない範囲で種々変更可能であることはいうまでもない。
Claims (20)
- 半導体基板に、スクライブ領域を含む素子形成領域を規定する工程と、
前記素子形成領域に半導体素子を形成する工程と、
前記半導体素子の上方に、複数の配線層を形成する工程と、
前記複数の配線層における最上層の配線層のうち、一の配線層を第1パッド電極とし、前記第1パッド電極を覆うように、第1絶縁膜を形成する工程と、
前記第1絶縁膜に、前記第1パッド電極を露出する第1開口部を形成する工程と、
前記第1開口部を介して前記第1パッド電極に接続される態様で、前記第1絶縁膜上に、表面にニッケル膜が形成された再配線を形成する工程と、
前記再配線を覆い、前記再配線に連通する第2開口部を有する第2絶縁膜を形成する工程と、
少なくとも前記第2開口部が位置する前記再配線の表面の部分に、バリア膜を形成する工程と、
前記バリア膜を形成した後、熱処理を行いながら前記半導体素子をテストする工程と、
前記バリア膜に、外部との電気的な接続を図る接続部材を接続する工程と
を有し、
前記バリア膜を形成する工程は、パラジウム(Pd)、ルテニウム(Ru)、ロジウム(Rh)、白金(Pt)およびイリジウム(Ir)なる群から選ばれるいずれか一の材料からなる膜を少なくとも形成する工程を備え、
前記複数の配線層を形成する工程は、前記スクライブ領域に第2パッド電極を形成する工程を含み、
前記バリア膜を形成する工程は、前記第2パッド電極上に形成する工程を含む、半導体装置の製造方法。 - 前記接続部材を接続する工程は、前記第2開口部の底に露出する前記バリア膜の表面に、はんだボールを接続する工程を含む、請求項1記載の半導体装置の製造方法。
- 前記半導体素子を形成する工程は、フラッシュメモリを形成する工程を含み、
前記半導体素子をテストする工程は、
前記バリア膜にプローブ針を接触する工程と、
前記プローブ針が前記バリア膜に接触した状態で、前記フラッシュメモリの記憶保持テストを行う工程と
を含む、請求項1記載の半導体装置の製造方法。 - 前記再配線を形成する工程は、
前記第1絶縁膜を覆うように、銅シード層を形成する工程と、
前記銅シード層の部分を露出する開口パターンを有するフォトレジストパターンを形成する工程と、
第1電解めっきによって、前記フォトレジストパターンの前記開口パターンの底に露出する前記銅シード層の表面に銅膜を形成する工程と、
第2電解めっきによって、前記フォトレジストパターンの前記開口パターンの底に露出する前記銅膜の表面にニッケル膜を形成する工程と
を含む、請求項1記載の半導体装置の製造方法。 - 前記バリア膜を形成する工程は、
スパッタ法によって、前記第2絶縁膜の前記第2開口部の底面に露出した前記再配線の表面の部分を含む前記第2絶縁膜の表面に、前記一の材料からなる膜を形成する工程と、
少なくとも前記第2開口部の底面に位置する前記一の材料からなる膜の第1部分を残して、前記第1部分以外の部分を除去する工程と
を含む、請求項1記載の半導体装置の製造方法。 - 前記素子形成領域を規定する工程は、隣り合う一の素子形成領域と他の素子形成領域との間に前記スクライブ領域を規定する工程を含み、
前記複数の配線層を形成する工程は、前記複数の配線層における最上層の配線層のうち、他の配線層を前記第2パッド電極として形成する工程を含み、
前記バリア膜を形成する工程は、
前記第2絶縁膜の表面とともに、前記第2パッド電極を覆うように、前記一の材料からなる膜を形成する工程と、
前記第2開口部の底面に位置する前記第1部分と、前記第2パッド電極を覆う前記一の材料からなる膜の第2部分とを残して、前記第1部分および前記第2部分以外の部分を除去する工程と
を含む、請求項5記載の半導体装置の製造方法。 - 前記スクライブ領域に位置する、前記一の材料からなる膜の前記第2部分を含む前記バリア膜に、他のプローブ針を接触することにより、他のテストを行う工程を備えた、請求項6記載の半導体装置の製造方法。
- 前記バリア膜を形成する工程は、前記再配線を形成した後、前記第2絶縁膜を形成する前に、電解めっきによって、前記再配線の上面に前記一の材料からなる膜を形成する工程を含む、請求項4記載の半導体装置の製造方法。
- 前記素子形成領域を規定する工程は、隣り合う一の素子形成領域と他の素子形成領域との間に前記スクライブ領域を規定する工程を含み、
前記複数の配線層を形成する工程は、前記複数の配線層における最上層の配線層のうち、他の配線層を前記第2パッド電極として形成する工程を含み、
前記バリア膜を形成する工程は、
前記スクライブ領域を前記フォトレジストパターンで覆った状態で、前記再配線の上面に前記一の材料からなる膜を形成する工程と、
前記一の材料からなる膜を形成した後、前記フォトレジストパターンを除去し、前記第2パッド電極を露出する工程と
を含む、請求項8記載の半導体装置の製造方法。 - 前記スクライブ領域に位置する前記第2パッド電極に、他のプローブ針を接触することにより、他のテストを行う工程を備えた、請求項9記載の半導体装置の製造方法。
- 前記接続部材を接続する工程は、前記第2開口部の底に露出する前記バリア膜の表面に、ワイヤをボンディングする工程を含む、請求項1記載の半導体装置の製造方法。
- 前記半導体素子をテストする工程における前記熱処理の温度は、前記はんだボールの融点よりも高い、請求項2記載の半導体装置の製造方法。
- 前記バリア膜を形成する工程では、前記一の材料からなる膜と前記群から選ばれる他の材料からなる膜とを少なくとも積層した積層膜が形成される、請求項1記載の半導体装置の製造方法。
- 半導体基板に規定された素子形成領域およびスクライブ領域と、
前記素子形成領域に形成された半導体素子と、
前記半導体素子の上方に形成された複数の配線層と、
前記複数の配線層における最上層の配線層のうち、一の配線層を第1パッド電極とし、前記第1パッド電極を覆うように形成された、前記第1パッド電極に達する第1開口部を有する第1絶縁膜と、
前記第1開口部を介して前記第1パッド電極に電気的に接続される態様で、前記第1絶縁膜上に形成され、表面にニッケル膜が形成された再配線と、
前記再配線を覆うように形成された、前記再配線に達する第2開口部を有する第2絶縁膜と、
前記第2開口部の底に位置する前記再配線の部分の表面に形成された第1部分を含むバリア膜と、
前記バリア膜に接続された、外部との電気的な接続を図る接続部材と
を含み、
前記バリア膜は、パラジウム(Pd)、ルテニウム(Ru)、ロジウム(Rh)、白金(Pt)およびイリジウム(Ir)なる群から選ばれるいずれか一の材料からなる膜を備え、
前記複数の配線層は、前記スクライブ領域に形成された第2パッド電極を含み、
前記バリア膜は、前記第2パッド電極上に形成された第2部分を含む、半導体装置。 - 前記接続部材は、はんだボールを含む、請求項14記載の半導体装置。
- 前記接続部材は、ワイヤを含む、請求項14記載の半導体装置。
- 前記半導体素子はフラッシュメモリを含む、請求項14記載の半導体装置。
- 前記バリア膜は、前記第2開口部の底に位置する前記再配線の部分の表面を含む、前記再配線の上面の全面にわたって形成された、請求項14記載の半導体装置。
- 前記再配線は、
銅シード層と
前記銅シード層の表面に形成された銅膜と、
前記銅膜の表面に形成されたニッケル膜と
を含む、請求項14記載の半導体装置。 - 前記バリア膜は、前記一の材料からなる膜と前記群から選ばれる他の材料からなる膜とを少なくとも積層した積層膜を含む、請求項14記載の半導体装置。
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US9385076B2 (en) * | 2011-12-07 | 2016-07-05 | Taiwan Semiconductor Manufacturing Company, Ltd. | Semiconductor device with bump structure on an interconncet structure |
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US9607954B2 (en) | 2017-03-28 |
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