JP6537815B2 - 半導体パッケージ及びその製造方法 - Google Patents
半導体パッケージ及びその製造方法 Download PDFInfo
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- JP6537815B2 JP6537815B2 JP2014250866A JP2014250866A JP6537815B2 JP 6537815 B2 JP6537815 B2 JP 6537815B2 JP 2014250866 A JP2014250866 A JP 2014250866A JP 2014250866 A JP2014250866 A JP 2014250866A JP 6537815 B2 JP6537815 B2 JP 6537815B2
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- buffer layer
- sealing body
- intermediate buffer
- semiconductor package
- wiring
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Classifications
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Description
<パッケージの外観>
図1は、本発明の第1実施形態に係る半導体パッケージ100の外観図である。なお、図1の手前部分は、内部構成の外観を示すために切断面を図示している。
図2は、図1を用いて説明した半導体パッケージ100の構造の一部を詳細に説明するための断面図である。101は、支持基板であり、ここでは金属基板を用いる。金属基板としては、ステンレス等の鉄合金基板や銅合金基板などの金属基板を用いればよい。勿論、金属基板に限定する必要はなく、用途やコストに応じて、シリコン基板、ガラス基板、セラミックス基板、有機基板などを用いることも可能である。
図3〜図8は、本発明の第1実施形態に係る半導体パッケージ100の製造工程を示す図である。
図9は、本発明の第2実施形態に係る半導体パッケージ200の構造の一部を示す断面図である。第2実施形態に係る半導体パッケージ200は、中間バッファ層上に直接配線を設けた構造となっている。なお、本実施形態における各層(例えば、下地バッファ層、中間バッファ層及び封止体)の詳細については、第1実施形態で説明したとおりであるので、共通する部分についての説明は省略する。
図10は、本発明の第3実施形態に係る半導体パッケージ300の構造の一部を示す断面図である。第3実施形態に係る半導体パッケージ300は、第2実施形態に係る半導体パッケージ200と比べて、下地バッファ層上に複数の半導体デバイスを並列に配置した点が異なる。なお、本実施形態における各層(例えば、下地バッファ層、中間バッファ層及び封止体)の詳細については、第1実施形態で説明したとおりであるので、共通する部分についての説明は省略する。
図11は、本発明の第4実施形態に係る半導体パッケージ400の構造の一部を示す断面図である。第4実施形態に係る半導体パッケージ400は、半導体デバイスをスタック構造とした積層体ごとに中間バッファ層を設けた構造となっている。なお、本実施形態における各層(例えば、下地バッファ層、中間バッファ層及び封止体)の詳細については、第1実施形態で説明したとおりであるので、共通する部分についての説明は省略する。
図12は、本発明の第5実施形態に係る半導体パッケージ500の構造の一部を示す断面図である。第5実施形態に係る半導体パッケージ500は、半導体デバイスをスタック構造とした積層体を複数段重ねるとともに、積層体ごとに中間バッファ層を設けた構造となっている。なお、本実施形態における各層(例えば、下地バッファ層、中間バッファ層及び封止体)の詳細については、第1実施形態で説明したとおりであるので、共通する部分についての説明は省略する。
図13は、本発明の第6実施形態に係る半導体パッケージ600の構造の一部を示す断面図である。第6実施形態に係る半導体パッケージ600は、半導体デバイスを4段重ねたスタック構造とした積層体ごとに中間バッファ層を設けた構造となっている。勿論、4段に限らず、8段、16段などさらに複数の半導体デバイスを重ねた構造としてもよい。なお、本実施形態における各層(例えば、下地バッファ層、中間バッファ層及び封止体)の詳細については、第1実施形態で説明したとおりであるので、共通する部分についての説明は省略する。
図14は、本発明の第7実施形態に係る半導体パッケージ700の構造の一部を示す断面図である。第7実施形態に係る半導体パッケージ700は、1つの半導体デバイスを含む積層体を、中間バッファ層を介して重ね、各半導体デバイスを電気的に接続した構造となっている。なお、本実施形態における各層(例えば、下地バッファ層、中間バッファ層及び封止体)の詳細については、第1実施形態で説明したとおりであるので、共通する部分についての説明は省略する。
図15は、本発明の第8実施形態に係る半導体パッケージ800、801の構造の一部を示す断面図である。本実施形態に係る半導体パッケージの構造は、基本的には第7実施形態に係る半導体パッケージと同様であるため、ここでは相違する部分に着目して説明する。したがって、第7実施形態と同じ部分については、第7実施形態に係る半導体パッケージ700と同じ符号を用いている。
本実施形態では、第1実施形態から第8実施形態で説明した下地バッファ層についての詳細を説明する。各実施形態に係る半導体パッケージは、支持基板の主面に応力緩和層として下地バッファ層を設けたことにより、支持基板と封止体との間の物性値(特に、弾性率や線膨張係数)の差に起因する応力の発生を低減する構造となっている。以下、下地バッファ層の物性について詳細に説明する。
支持基板:金属基板(弾性率:193GPa@25℃、100℃)
応力緩和層:変性エポキシ系樹脂(弾性率:580MPa@25℃、4MPa@100℃)
封止体:エポキシ系樹脂(弾性率:16GPa@25℃、14.7GPa@100℃)
支持基板:金属基板(弾性率:193GPa@25℃、100℃)
応力緩和層:変性エポキシ系樹脂(弾性率:10MPa@25℃、0.6MPa@100℃)
封止体:エポキシ系樹脂(弾性率:1.8GPa@25℃、1GPa@100℃)
101:支持基板
102:下地バッファ層
103、105、107、109:積層体
103a、105a、107a、109a:半導体デバイス
103b、105b、107b、109b、110、112:封止体
103c、105c、107c、109c、111、113:配線
104、106、108:中間バッファ層
114:ソルダレジスト
115:外部端子
Claims (19)
- 支持基板に接して設けられた下地バッファ層と、
前記下地バッファ層上に、前記支持基板の主面に対して垂直な方向に重ねて配置された第1グループの半導体デバイスと、
前記第1グループの半導体デバイスを覆う第1封止体と、
前記第1封止体上に設けられ、前記第1グループの半導体デバイスのいずれかに接続された第1配線と、
前記第1配線を覆う第1中間バッファ層と、
前記第1中間バッファ層上に設けられ、前記第1配線に接続された第2配線と、
前記第2配線を覆う第2中間バッファ層と、
前記第2中間バッファ層上に設けられた第2封止体と、
を含む半導体パッケージであって、
前記第1中間バッファ層及び前記第2中間バッファ層は、同一温度条件下において、前記第1封止体及び前記第2封止体よりも小さい弾性率を有する絶縁材料を含み、
前記下地バッファ層には第1開口部が設けられ、
前記第1開口部の内側における前記第1封止体には、前記第1開口部よりも径の小さい第2開口部が設けられ、
前記第2開口部を介して前記第1配線と前記支持基板とが接続されることを特徴とする半導体パッケージ。 - 前記第2中間バッファ層上に、前記支持基板の主面に対して垂直な方向に重ねて配置された第2グループの半導体デバイスをさらに含み、
前記第2封止体は、前記第2中間バッファ層上に設けられた前記第2グループの半導体デバイスを覆うことを特徴とする請求項1に記載の半導体パッケージ。 - 前記第1グループの半導体デバイスは、平面視において互いに一部が重ならないように配置されることを特徴とする請求項1又は2に記載の半導体パッケージ。
- 前記第1封止体と前記第2封止体とは同一の絶縁材料からなることを特徴とする請求項1〜3のいずれか1項に記載の半導体パッケージ。
- 前記第1中間バッファ層と前記第2中間バッファ層の合計膜厚は、前記第1封止体の膜厚の1/10〜1/2であることを特徴とする請求項1〜4のいずれか1項に記載の半導体パッケージ。
- 前記第1封止体は、前記下地バッファ層上に配置されていることを特徴とする請求項1〜5のいずれか1項に記載の半導体パッケージ。
- 前記第1中間バッファ層及び前記第2中間バッファ層は、室温において2GPa以下、かつ、100℃を超える温度において1GPa以下の弾性率を有する材料で構成されることを特徴とする請求項1〜6のいずれか1項に記載の半導体パッケージ。
- 前記第1中間バッファ層により前記第1配線に起因する段差が平坦化されていることを特徴とする請求項1〜7のいずれか1項に記載の半導体パッケージ。
- 前記第1中間バッファ層及び前記第2中間バッファ層は、熱硬化性樹脂を含むことを特徴とする請求項1〜8のいずれか1項に記載の半導体パッケージ。
- 支持基板上に下地バッファ層を形成し、
前記下地バッファ層に第1開口部を形成し、
前記下地バッファ層上に、半導体デバイスと封止体とを交互に重ねて配置することにより、前記支持基板の主面に対して垂直な方向に重ねて配置された第1グループの半導体デバイスと当該第1グループの半導体デバイスを覆う第1封止体とを含む構造体を形成するとともに、前記第1開口部を前記第1封止体で覆い、
前記第1開口部の内側において前記第1封止体に前記第1開口部よりも径の小さい第2開口部を形成し、
前記第1封止体上に、前記第1グループの半導体デバイスのいずれかに接続された第1配線を形成するとともに、前記第2開口部を介して前記第1配線と前記支持基板とを接続させ、
前記第1配線上に第1中間バッファ層を形成し、
前記第1中間バッファ層上に、前記第1配線に接続された第2配線を形成し、
前記第2配線上に第2中間バッファ層を形成し、
前記第2中間バッファ層上に第2封止体を形成することを含む、半導体パッケージの製造方法であって、
前記第1中間バッファ層及び前記第2中間バッファ層は、同一温度条件下において、前記第1封止体及び前記第2封止体よりも小さい弾性率を有する絶縁材料を含むことを特徴とする半導体パッケージの製造方法。 - 前記第2中間バッファ層上に、半導体デバイスと封止体とを交互に重ねて配置することにより、前記支持基板の主面に対して垂直な方向に重ねて配置された第2グループの半導体デバイスと当該第2グループの半導体デバイスを覆う前記第2封止体とを含む構造体を形成することを特徴とする請求項10に記載の半導体パッケージの製造方法。
- 前記第2封止体上に、前記第2グループの半導体デバイスに接続された第3配線をさらに形成することを特徴とする請求項11に記載の半導体パッケージの製造方法。
- 前記第1グループの半導体デバイスは、平面視において互いに一部が重ならないように配置されることを特徴とする請求項10〜12のいずれか1項に記載の半導体パッケージの製造方法。
- 前記第1封止体と前記第2封止体とは同一の絶縁材料からなることを特徴とする請求項10〜13のいずれか1項に記載の半導体パッケージの製造方法。
- 前記第1中間バッファ層と前記第2中間バッファ層の合計膜厚は、前記第1封止体の膜
厚の1/10〜1/2であることを特徴とする請求項10〜14のいずれか1項に記載の半導体パッケージの製造方法。 - 前記第1グループの半導体デバイスは、前記下地バッファ層上に配置されることを特徴とする請求項10〜15のいずれか1項に記載の半導体パッケージの製造方法。
- 前記第1中間バッファ層及び前記第2中間バッファ層は、室温において2GPa以下、かつ、100℃を超える温度において1GPa以下の弾性率を有する材料で構成されることを特徴とする請求項10〜16のいずれか1項に記載の半導体パッケージの製造方法。
- 前記第1中間バッファ層を用いて前記第1配線に起因する段差を平坦化することを特徴とする請求項10〜17のいずれか1項に記載の半導体パッケージの製造方法。
- 前記第1中間バッファ層及び前記第2中間バッファ層は、熱硬化性樹脂を含むことを特徴とする請求項10〜18のいずれか1項に記載の半導体パッケージの製造方法。
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JP7005449B2 (ja) * | 2018-07-23 | 2022-01-21 | 三菱電機株式会社 | 半導体装置、電力変換装置、半導体装置の製造方法、および、電力変換装置の製造方法 |
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JP2003179099A (ja) * | 2001-12-12 | 2003-06-27 | Toshiba Corp | 半導体装置およびその製造方法 |
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US20100193930A1 (en) * | 2009-02-02 | 2010-08-05 | Samsung Electronics Co., Ltd. | Multi-chip semiconductor devices having conductive vias and methods of forming the same |
JPWO2010101167A1 (ja) * | 2009-03-05 | 2012-09-10 | 日本電気株式会社 | 半導体装置及びその製造方法 |
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JP2011129717A (ja) * | 2009-12-17 | 2011-06-30 | Sumitomo Bakelite Co Ltd | 半導体パッケージおよび半導体装置 |
US9406658B2 (en) * | 2010-12-17 | 2016-08-02 | Advanced Semiconductor Engineering, Inc. | Embedded component device and manufacturing methods thereof |
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US8970023B2 (en) * | 2013-02-04 | 2015-03-03 | Taiwan Semiconductor Manufacturing Company, Ltd. | Package structure and methods of forming same |
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CN105702637A (zh) | 2016-06-22 |
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