JP7391574B2 - 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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- JP7391574B2 JP7391574B2 JP2019157290A JP2019157290A JP7391574B2 JP 7391574 B2 JP7391574 B2 JP 7391574B2 JP 2019157290 A JP2019157290 A JP 2019157290A JP 2019157290 A JP2019157290 A JP 2019157290A JP 7391574 B2 JP7391574 B2 JP 7391574B2
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Description
本発明の第1の実施形態に係る半導体装置について、図1を参照しながら説明する。図1は第1の実施形態に係る半導体装置の断面図である。半導体装置は、第1チップ10と、第2チップ20と、第3チップ30と、が順に積層されて構成されている。第1チップ10は、化合物半導体により構成される第1基板110と、第1基板110に形成された半導体素子120を含む。半導体素子120は、化合物半導体により構成される。第2チップ20は、シリコンを含み、半導体素子120と電気的に接続された回路を含む。第3チップ30は、第1チップ10との線膨張係数の差が第1チップ10と第2チップ20との線膨張係数の差よりも小さい第3基板を含む。図1では、第3基板により第3チップ30が構成されている。
本発明の第2の実施形態について図4を用いて説明する。本実施形態は、第1の実施形態で説明した半導体装置を不図示の実装基板に実装した後に、第3チップ30および接着剤117を取り除く点で第1の実施形態と異なる。以下で説明する事項以外は、第1の実施形態と同様であるため、説明を省略する。
本発明の第3の実施形態の製造方法について、図5(a)~(e)を用いて説明する。本実施形態は、素子分離溝103および共通電極溝104に絶縁層を埋め込まない点が第1の実施形態と異なる。以下で説明する事項以外は、第1の実施形態と同様であるため、説明を省略する。
図6は、本実施形態に係る光電変換システム1200の構成を示すブロック図である。本実施形態の光電変換システム1200は、光電変換装置1204を含む。ここで、光電変換装置1204は、上述の実施形態で述べた半導体装置のいずれかを適用することができる。光電変換システム1200は例えば、撮像システムとして用いることができる。撮像システムの具体例としては、デジタルスチルカメラ、デジタルカムコーダー、監視カメラ等が挙げられる。図6では、光電変換システム1200としてデジタルスチルカメラの例を示している。
本実施形態の光電変換システム及び移動体について、図7および図8を用いて説明する。図7は、本実施形態による光電変換システム及び移動体の構成例を示す概略図である。図8は、本実施形態による光電変換システムの動作を示すフロー図である。本実施形態では、光電変換システムとして、車載カメラの一例を示す。
本実施形態の表示装置について図9を用いて説明する。表示装置は、第1の実施形態から第3の実施形態のいずれかに記載の半導体装置を含む。本実施形態において半導体装置に含まれる半導体素子は発光素子である。表示装置や照明装置の他にも、電子写真方式の画像形成装置の露光光源や液晶表示装置のバックライト、白色光源にカラーフィルタを有する発光装置等の用途がある。
20 第2チップ
30 第3チップ
101 第1基板
102 第2基板
120 半導体素子
130 回路
Claims (32)
- 半導体素子が形成された第1基板を有する第1チップと、前記半導体素子と電気的に接続された回路の一部を含み、前記第1基板とは線膨張係数の異なる第2基板を有する第2チップと、前記第1基板との線膨張係数の差が前記第1基板と前記第2基板との線膨張係数の差よりも小さい第3基板を含む第3チップと、を有し、前記第2チップが前記第1チップと前記第3チップに挟まれた中間部材を準備する工程と、
前記中間部材を加熱して、前記第1チップと前記第2チップとを接合する工程と、を有することを特徴とする半導体装置の製造方法。 - 化合物半導体を含み、半導体素子が形成された第1基板を有する第1チップと、シリコンを含み、前記半導体素子と電気的に接続された回路の一部を含む第2基板を有する第2チップと、線膨張係数が3×10-6/K以上6.5×10-6/K以下の範囲内にある第3基板を有する第3チップ、を有し、前記第2チップが前記第1チップと前記第3チップに挟まれた中間部材を準備する工程と、
前記中間部材を加熱して、前記第1チップと前記第2チップとを接合する工程と、を有することを特徴とする半導体装置の製造方法。 - 中間部材を準備する工程において、常温接合された前記第2チップと前記第3チップとを準備することを特徴とする請求項1または2に記載の半導体装置の製造方法。
- 前記常温接合は、紫外線硬化性の接着剤による接合であることを特徴とする請求項3に記載の半導体装置の製造方法。
- 前記紫外線硬化性の接着剤は、透光性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。
- 前記中間部材を加熱する工程の前に、前記第3チップに接合された前記第2基板の前記第3チップの側の面に対向する面を薄化する工程を備えることを特徴とする請求項1乃至5のいずれか1項に記載の半導体装置の製造方法。
- 前記薄化する工程の後の前記第2基板の厚みは、前記第1基板の厚みよりも薄い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。
- 前記第2基板の前記第3チップの側の面に対向する面を薄化する工程の後に、前記第2基板に貫通電極を形成することを特徴とする請求項6または7に記載の半導体装置の製造方法。
- 前記半導体素子は、受光素子および発光素子の少なくとも一方であることを特徴とする請求項1乃至8のいずれか1項に記載の半導体装置の製造方法。
- 前記回路は、前記半導体素子の信号の読み出し回路および前記半導体素子への電位の供給を制御する制御回路の少なくとも一方であることを特徴とする請求項9に記載の半導体装置の製造方法。
- 前記接合する工程の後に、前記第3チップを除去することを特徴とする請求項1乃至10のいずれか1項に記載の半導体装置の製造方法。
- 前記第1基板は、3-5族半導体を含むことを特徴とする請求項1乃至11のいずれか1項に記載の半導体装置の製造方法。
- 前記第1チップと前記第2チップとを接合する工程において、前記半導体素子と電気的に接続され、銅を含む第1接合電極と、前記回路と電気的に接続され、銅を含む第2接合電極と、を接合することを特徴とする請求項1乃至12のいずれか1項に記載の半導体装置の製造方法。
- 前記第1チップは第1絶縁層を有し、
前記第2チップは第2絶縁層を有し、
前記第1チップと前記第2チップとを接合する工程において、前記第1絶縁層と前記第2絶縁層を接合することを特徴とする請求項1乃至13のいずれか1項に記載の半導体装置の製造方法。 - 化合物半導体を含み、半導体素子が形成された第1基板を有する第1チップと、
前記第1チップと接合され、前記半導体素子と電気的に接続された回路の一部を含み、前記第1基板とは線膨張係数が異なり、シリコンを含む第2基板を有する第2チップと、
前記第2チップと接合され、前記第1基板との線膨張係数の差が前記第1基板と前記第2基板との線膨張係数の差よりも小さい第3基板を含む第3チップと、が順に積層された半導体装置。 - 化合物半導体を含み、半導体素子が形成された第1基板を有する第1チップと、
前記第1チップと接合され、前記半導体素子と電気的に接続された回路の一部を含み、シリコンを含む第2基板を有する第2チップと、
前記第2チップと接合され、線膨張係数が3×10-6/K以上6.5×10-6/K以下の範囲内にある第3基板を有する第3チップと、が順に積層された半導体装置。 - 前記半導体素子は、受光素子および発光素子の少なくとも一方であることを特徴とする請求項15または16に記載の半導体装置。
- 前記第3チップは、透光性を有することを特徴とする請求項15乃至17のいずれか1項に記載の半導体装置。
- 前記第3チップと前記第2基板との間に透光性の接着剤が配されていることを特徴とする請求項15乃至18のいずれか1項に記載の半導体装置。
- 前記第2基板の厚みは、前記第1基板の厚みよりも薄いことを特徴とする請求項15乃至19のいずれか1項に記載の半導体装置。
- 前記第1基板は、3-5族半導体を含むことを特徴とする請求項15乃至20のいずれか1項に記載の半導体装置。
- 前記第1基板に前記半導体素子が複数配され、複数の前記半導体素子のそれぞれの間に素子分離溝が配されることを特徴とする請求項15乃至21のいずれか1項に記載の半導体装置。
- 前記素子分離溝は絶縁膜を含むことを特徴とする請求項22に記載の半導体装置。
- 断面視において、前記回路は、複数の前記半導体素子の間に配されることを特徴とする請求項15乃至23のいずれか1項に記載の半導体装置。
- 前記回路は、リセットトランジスタおよび増幅トランジスタおよび選択トランジスタの少なくともいずれか1つを含むことを特徴とする請求項15乃至24のいずれか1項に記載の半導体装置。
- 前記第2基板は第1面と第2面を有し、前記第1面側に配線層が配され、前記第1面から前記第2面を貫通するように貫通電極が配され、前記貫通電極は、前記配線層に設けられているメタル層と接続されることを特徴とする請求項15乃至25のいずれか1項に記載の半導体装置。
- 前記回路は、前記配線層を介して前記貫通電極と接続されることを特徴とする請求項26に記載の半導体装置。
- 前記第1チップに絶縁膜を含む共通電極溝が配され、前記共通電極溝内に共通電極が配されることを特徴とする請求項15乃至27のいずれか1項に記載の半導体装置。
- 前記第1基板は、GaAs、InAs、InP、AlP、GaAs、GaAs、AlGaN、GaNからなる群から選択される少なくともいずれか1つを含むことを特徴とする請求項15乃至28のいずれか1項に記載の半導体装置。
- 前記第1基板は、InP、InGaAsからなる群から選択される少なくともいずれか1つを含むことを特徴とする請求項15乃至28のいずれか1項に記載の半導体装置。
- 前記第3基板は、ガラスまたは3-5族半導体のいずれかを含むことを特徴とする請求項15乃至30のいずれか1項に記載の半導体装置。
- 請求項15または16に記載の半導体装置を備える光電変換システムであって、
前記半導体装置は、前記半導体素子として受光素子を備える光電変換装置であり、
前記光電変換装置の撮像面に像を結像する光学系と、
前記光電変換装置から出力された信号を処理する信号処理部と、
を備えることを特徴とする光電変換システム。
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