JP2020047750A - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
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- JP2020047750A JP2020047750A JP2018174528A JP2018174528A JP2020047750A JP 2020047750 A JP2020047750 A JP 2020047750A JP 2018174528 A JP2018174528 A JP 2018174528A JP 2018174528 A JP2018174528 A JP 2018174528A JP 2020047750 A JP2020047750 A JP 2020047750A
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- semiconductor chip
- semiconductor
- electrode
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- semiconductor device
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Abstract
Description
なお、図面は模式的又は概念的なものであり、各部分の厚みと幅との関係、部分間の大きさの比率などは、必ずしも現実のものと同一とは限らない。また、同じ部分を表す場合であっても、図面により互いの寸法や比率が異なって表される場合もある。
また、本願明細書と各図において、既に説明したものと同様の要素には同一の符号を付して詳細な説明は適宜省略する。
以下の説明及び図面において、n+、n、n−及びp+、pの表記は、各導電形における不純物濃度の相対的な高低を表す。すなわち、「+」が付されている表記は、「+」及び「−」のいずれも付されていない表記よりも不純物濃度が相対的に高く、「−」が付されている表記は、いずれも付されていない表記よりも不純物濃度が相対的に低いことを示す。また、これらの表記は、それぞれの領域にp形不純物とn形不純物の両方が含まれている場合には、それらの不純物が補償しあった後の正味の不純物濃度の相対的な高低を表す。
以下で説明する各実施形態について、各半導体領域のp形とn形を反転させて各実施形態を実施してもよい。
図1は、第1実施形態に係る半導体装置を表す断面図である。
図1に表した半導体装置100は、半導体チップ10(第1半導体チップ)、半導体チップ20(第2半導体チップの一例)、第1金属板41、第2金属板42、金属板43、及びハウジング44(枠体)を有する。
半導体チップ10は、RC−IGBTである。半導体チップ10は、図2に表したように、コレクタ電極11、エミッタ電極12、ゲートパッド13、半導体部14、ゲート電極15、及び導電部16を有する。
半導体チップ20は、IGBTである。半導体チップ20は、図3に表したように、コレクタ電極21(第3電極の一例)、エミッタ電極22(第4電極の一例)、ゲートパッド23、半導体部24、及びゲート電極25を有する。
コレクタ電極11、コレクタ電極21、エミッタ電極12、エミッタ電極22、ゲートパッド13、及びゲートパッド23は、アルミニウム、ニッケル、又は銅などの金属を含む。
半導体部14及び半導体部24は、半導体材料として、シリコン、炭化シリコン、窒化ガリウム、又はガリウムヒ素を含む。半導体材料としてシリコンが用いられる場合、n形不純物として、ヒ素、リン、又はアンチモンが用いられる。p形不純物として、ボロンが用いられる。
ゲート電極15、ゲート電極25、及び導電部16は、ポリシリコンなどの導電材料を含む。ゲート絶縁層15a、ゲート絶縁層25a、絶縁層16a、絶縁層17、及び絶縁層27は、酸化シリコンなどの絶縁材料を含む。
金属板43を通してゲート電極15に閾値以上の電圧が印加されると、p形ベース領域14eのゲート絶縁層15a近傍にチャネルが形成される。例えば、第1金属板41には、第2金属板42に対して正の電圧が印加される。すなわち、コレクタ電極11には、エミッタ電極12に対して正の電圧が印加される。この状態でチャネルが形成されると、電子が、チャネルを通ってエミッタ電極12からn−形ドリフト領域14dへ流れ、コレクタ電極11から排出される。正孔は、p+形コレクタ領域14aを通してコレクタ電極11からn−形ドリフト領域14dへ流れ、エミッタ電極12から排出される。これにより、半導体チップ10に電流が流れ、半導体チップ10がオン状態となる。
また、半導体チップ10及び半導体チップ20がオン状態のとき、n−形ドリフト領域14d及びn−形ドリフト領域24dでは、注入された電子及び正孔により伝導度変調が生じ、電気抵抗が大きく減少する。
図4では、半導体チップ10と半導体チップ20に、互いに異なるハッチングが付されている。図4に表したように、例えば、半導体チップ20の数は、半導体チップ10の数よりも少ない。また、半導体チップ20は、複数の半導体チップ10に囲まれた位置に設けられる。複数の半導体チップ20は、互いに隣接して設けられる。
図5は、参考例に係る半導体装置を表す平面図である。
図6は、参考例に係る半導体装置の特性を例示するグラフである。
図7は、参考例に係る半導体装置の動作を表す断面図である。
図8(a)及び図8(b)において、横軸は電圧VCを表し、縦軸は電流IONを表す。また、図8(a)は、半導体チップ10及び半導体チップ20の特性を表す。図8(b)は、半導体装置100全体の特性を表す。
半導体チップ10の具体的な構成は、半導体チップ10がRC−IGBTとして動作できれば、適宜変更可能である。
図11及び図12では、図4とは異なる半導体チップの配置例を表している。図11(a)に表したように、複数の半導体チップ20は、半導体装置100の外周に互いに離れて設けられていても良い。図11(b)に表したように、半導体装置100の中央及び外周の両方に半導体チップ20が設けられていても良い。又は、図12に表したように、複数の半導体チップ20が、半導体装置100の中央と外周との間の中間部に互いに離れて設けられていても良い。いずれの配置においても、半導体装置100におけるMOSの動作及びスナップバックの発生を抑制し、半導体装置100の消費電力を低減することが可能である。
図13は、第2実施形態に係る半導体装置を表す断面図である。
第2実施形態に係る半導体装置200は、図13に表したように、半導体チップ20に代えて、半導体チップ30(第2半導体チップの別の一例)を有する。半導体チップ30は、第3導電部41cと第4導電部42dとの間に設けられ、第3導電部41c及び第4導電部42dと電気的に接続されている。
半導体チップ30は、ダイオードである。例えば図14に表したように、半導体チップ30は、カソード電極31(第3電極の別の一例)、アノード電極32(第4電極の別の一例)、及び半導体部34を有する。
図15では、半導体チップ10と半導体チップ30に、互いに異なるハッチングが付されている。図15に表したように、例えば、半導体チップ30の数は、半導体チップ10の数よりも少ない。また、半導体チップ30は、複数の半導体チップ10に囲まれた位置に設けられる。複数の半導体チップ30は、互いに隣接して設けられる。半導体チップ10を半導体チップ30よりも半導体装置200の外周側に設けることで、半導体装置100と同様に、半導体装置200の動作時の温度上昇を抑制できる。
図16は、参考例に係る半導体装置の特性を例示するグラフである。
図17は、参考例に係る半導体装置の動作を表す断面図である。
図18(a)及び図18(b)において、横軸は電圧VEを表し、縦軸は電流IFを表す。また、図18(a)は、半導体チップ10及び半導体チップ30の特性を表す。図18(b)は、半導体装置200全体の特性を表す。
図19及び図20では、図13とは異なる半導体チップの配置例を表している。図19(a)に表したように、複数の半導体チップ30は、半導体装置200の外周に互いに離れて設けられていても良い。図19(b)に表したように、半導体装置200の中央及び外周の両方に半導体チップ30が設けられていても良い。又は、図20に表したように、複数の半導体チップ30が、半導体装置200の中央と外周との間の中間部に互いに離れて設けられていても良い。いずれの配置においても、半導体装置200におけるMOSの動作及びスナップバックの発生を抑制し、半導体装置200の消費電力を低減することが可能である。
図21は、第3実施形態に係る半導体装置を表す断面図である。
図21に表したように、第3実施形態に係る半導体装置300は、半導体チップ10、半導体チップ20、及び半導体チップ30を有する。
図22では、半導体チップ10〜30に、互いに異なるハッチングが付されている。また、図22に表した例では、半導体チップ20及び30の配置が、図21に表した例と異なる。
図23は、第3実施形態の変形例に係る半導体装置における半導体チップを表す断面図である。
図23(a)及び図23(b)は、それぞれ、半導体チップ20及び半導体チップ30を表す。変形例に係る半導体装置では、半導体チップ10〜30の全てがRC−IGBTである。
半導体チップ20では、例えば図23(a)に表したように、半導体部24が、p+形コレクタ領域24a、n+形カソード領域24b、n形バッファ領域24c、n−形ドリフト領域24d、p形ベース領域24e、n+形エミッタ領域24f、p形アノード領域24g、及びp+形アノード領域24hを有する。導電部26が、絶縁層26aを介してp形アノード領域24gと対向している。
図24〜図26では、図17及び図18とは異なる半導体チップの配置例を表している。図24(a)に表したように、複数の半導体チップ20が半導体装置300の中央に設けられ、複数の半導体チップ30が半導体装置300の外周に互いに離れて設けられていても良い。図24(b)に表したように、複数の半導体チップ30が半導体装置300の中央に設けられ、複数の半導体チップ20が半導体装置300の外周に互いに離れて設けられていても良い。
図27及び図28は、第4実施形態に係る半導体装置を表す斜視図である。
図29(a)及び図29(b)は、それぞれ図28のC−C’断面図及びD−D’断面図である。
なお、図28では、半導体装置の内部構造を表すために、封止部55および第3端子73が省略されている。
図30では、図28に表した半導体装置における半導体チップの配列が模式的に表されている。例えば、1つの第1金属層61の上において、半導体チップ20又は半導体チップ30は、半導体チップ10よりも、半導体装置400の外周側に設けられる。具体的には、半導体装置400は、X方向(第1方向)の中心C1と、X方向の一方の端部E1と、を有する。複数の半導体チップ10の一部、複数の半導体チップ20の一部、及び複数の半導体チップ30の一部は、中心C1と端部E1との間に設けられている。そして、これらの半導体チップについて、半導体チップ20又は半導体チップ30と端部E1との間のX方向における距離は、半導体チップ10と端部E1との間のX方向における距離よりも短い。
Claims (9)
- 第1導電部と、
前記第1導電部と電気的に接続された第1電極と、前記第1電極の反対側に設けられた第2電極と、有する逆導通型絶縁ゲートバイポーラトランジスタの第1半導体チップと、
前記第2電極と電気的に接続された第2導電部と、
前記第1導電部と電気的に接続され、前記第1導電部と同電位に設定される第3導電部と、
前記第3導電部と電気的に接続された第3電極と、前記第3電極の反対側に設けられた第4電極と、を有する絶縁ゲートバイポーラトランジスタの第2半導体チップと、
前記第4電極及び前記第2導電部と電気的に接続され、前記第2導電部と同電位に設定される第4導電部と、
を備えた半導体装置。 - 前記第1導電部及び前記第3導電部を有する第1金属板と、
前記第2導電部及び前記第4導電部を有する第2金属板と、
を備え、
前記第1半導体チップ及び前記第2半導体チップは、前記第1金属板と前記第2金属板との間に設けられた請求項1記載の半導体装置。 - 前記第1半導体チップ及び前記第2半導体チップの周りに設けられ、第1金属板の外周と第2金属板の外周との間に挟まれた枠体をさらに備え、
前記第1半導体チップ及び前記第2半導体チップは、前記第1金属板、前記第2金属板、及び前記枠体により封止された請求項2記載の半導体装置。 - 前記第1半導体チップ及び前記第2半導体チップは、前記第1金属板と前記第2金属板との間において、それぞれ複数設けられ、
前記第1半導体チップの数は、前記第2半導体チップの数よりも多い請求項3記載の半導体装置。 - 前記第1導電部及び前記第3導電部を有する第1金属層と、
前記第2導電部及び前記第4導電部を有し、前記第1金属層と離間して設けられた第2金属層と、
を備え、
前記第1半導体チップ及び前記第2半導体チップは、前記第1金属層の上に設けられた請求項1記載の半導体装置。 - 前記第1半導体チップ及び前記第2半導体チップは、前記第1金属層の上に第1方向に離間して設けられ、
前記第1半導体チップ及び前記第2半導体チップは、前記半導体装置の前記第1方向の中心と、前記半導体装置の前記第1方向の一端と、の間に設けられ、
前記第2半導体チップと前記一端との間の前記第1方向における距離は、前記第1半導体チップと前記一端との間の前記第1方向における距離よりも短い請求項5記載の半導体装置。 - 前記第1半導体チップは、前記第1金属層の上に複数設けられ、
前記第1金属層の上において、前記第1半導体チップの数は、前記第2半導体チップの数よりも多い請求項5記載の半導体装置。 - 前記第1導電部及び前記第3導電部と電気的に接続され、前記第1導電部及び前記第3導電部と同電位に設定される第5導電部と、
前記第5導電部と電気的に接続された第5電極と、前記第5電極の反対側に設けられた第6電極と、有するダイオードの第3半導体チップと、
前記第6電極、前記第2導電部、及び前記第4導電部と電気的に接続され、前記第2導電部及び前記第4導電部と同電位に設定される第6導電部と、
をさらに備えた請求項1記載の半導体装置。 - 第1導電部と、
前記第1導電部と電気的に接続された第1電極と、前記第1電極の反対側に設けられた第2電極と、有する逆導通型絶縁ゲートバイポーラトランジスタの第1半導体チップと、
前記第2電極と電気的に接続された第2導電部と、
前記第1導電部と電気的に接続され、前記第1導電部と同電位に設定される第3導電部と、
前記第3導電部と電気的に接続された第3電極と、前記第3電極の反対側に設けられた第4電極と、を有するダイオードの第2半導体チップと、
前記第4電極及び前記第2導電部と電気的に接続され、前記第2導電部と同電位に設定される第4導電部と、
を備えた半導体装置。
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CN115769368A (zh) * | 2021-05-28 | 2023-03-07 | 丹尼克斯半导体有限公司 | 半导体器件 |
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JP2000310173A (ja) * | 1999-04-28 | 2000-11-07 | Fuji Electric Co Ltd | 内燃機関点火用半導体装置 |
JP2002151646A (ja) * | 2000-11-10 | 2002-05-24 | Toshiba Corp | 圧接型半導体装置 |
US20170345917A1 (en) * | 2016-05-31 | 2017-11-30 | Infineon Technologies Ag | Electric assembly including a bipolar switching device and a wide bandgap transistor |
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JPH04234614A (ja) | 1991-01-08 | 1992-08-24 | Toshiba Corp | 樹脂注入装置 |
EP1030354A1 (en) | 1997-08-29 | 2000-08-23 | Hitachi, Ltd. | Compression bonded semiconductor device and power converter using the same |
JP4234614B2 (ja) | 2004-01-21 | 2009-03-04 | 株式会社日立製作所 | 圧接型半導体装置、及びこれを用いた変換器 |
DE102011006345A1 (de) * | 2011-03-29 | 2012-10-04 | Siemens Aktiengesellschaft | Modularer Mehrfachumrichter mit rückwärts leitfähigen Leistungshalbleiterschaltern |
JP2017162866A (ja) * | 2016-03-07 | 2017-09-14 | 株式会社東芝 | 半導体装置 |
JP7010794B2 (ja) * | 2018-09-19 | 2022-01-26 | 株式会社東芝 | 半導体装置 |
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JP2000310173A (ja) * | 1999-04-28 | 2000-11-07 | Fuji Electric Co Ltd | 内燃機関点火用半導体装置 |
JP2002151646A (ja) * | 2000-11-10 | 2002-05-24 | Toshiba Corp | 圧接型半導体装置 |
US20170345917A1 (en) * | 2016-05-31 | 2017-11-30 | Infineon Technologies Ag | Electric assembly including a bipolar switching device and a wide bandgap transistor |
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US20220102342A1 (en) | 2022-03-31 |
US20200091141A1 (en) | 2020-03-19 |
US11862629B2 (en) | 2024-01-02 |
US11233048B2 (en) | 2022-01-25 |
JP7010794B2 (ja) | 2022-01-26 |
CN110931470B (zh) | 2023-10-13 |
CN110931470A (zh) | 2020-03-27 |
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