JP7351209B2 - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
- Publication number
- JP7351209B2 JP7351209B2 JP2019227707A JP2019227707A JP7351209B2 JP 7351209 B2 JP7351209 B2 JP 7351209B2 JP 2019227707 A JP2019227707 A JP 2019227707A JP 2019227707 A JP2019227707 A JP 2019227707A JP 7351209 B2 JP7351209 B2 JP 7351209B2
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- conductor layer
- terminal
- semiconductor device
- control
- wiring
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Description
図1~図3は第1の実施の形態に係る半導体装置の一例について説明する図である。図1には、半導体装置の一例の要部平面図を模式的に示している。図2には、図1のL1-L1断面図を模式的に示している。図3(A)及び図3(B)には、半導体装置の一例の要部分解平面図を模式的に示している。
図4には、上記図1~図3に示したような構成を有する半導体装置1で実現可能な回路の一例の等価回路図を示している。図4の例では、上記2つの半導体素子2をいずれも、1つの半導体チップにIGBT2dとFWD2eとが内蔵された、逆導通IGBT(RC-IGBT)としている。RC-IGBTでは、IGBT2dのコレクタ電極CとFWD2eのカソード電極Kとが接続され、IGBT2dのエミッタ電極EとFWD2eのアノード電極Aとが接続される。
このように2つの半導体素子2にRC-IGBTが用いられる場合、半導体装置1の制御配線6及び制御端子8には、ゲート電極Gとエミッタ電極Eとの間に所定の電圧を印加するための2つの制御信号経路、即ち、ゲート電極Gと制御端子を結ぶ制御信号経路と、エミッタ電極Eと制御端子を結ぶ制御信号経路とが含まれる。
図1及び図2に示した半導体装置1の動作時には、2つの半導体素子2の制御電極2c(ゲート電極G)と負極電極2b(エミッタ電極E)との間に所定の電圧が印加され、2つの半導体素子2の正極電極2a(コレクタ電極C)と負極電極2b(エミッタ電極E)との間に所定の電圧が印加される。
また、半導体装置1では、半導体素子2の両主面側に導体層3及び導体層4が設けられることで、片方の主面側にのみ導体層が設けられる場合に比べて、半導体素子2の放熱効率、冷却効率が高められる。これにより、半導体素子2の過熱が抑えられ、過熱による半導体素子2の破損が抑えられ、また、半導体素子2に流す電流の大電流化が可能になる。
図5~図8は第2の実施の形態に係る半導体装置の一例について説明する図である。図5には、半導体装置の一例の要部平面図を模式的に示している。図6には、図5のL2-L2断面図を模式的に示している。図7及び図8には、半導体装置の一例の要部分解斜視図を模式的に示している。
基板30は、図5及び図6並びに図7に示すように、絶縁板31と、絶縁板31の一方の主面31aに設けられた導体層32と、絶縁板31の他方の主面31bに設けられた導体層33とを有する。尚、図5では便宜上、基板30の絶縁板31の他方の主面31bに設けられる導体層33の図示は省略している。半導体素子20は、基板30の導体層32側に設けられる。
半導体装置10の動作時には、2つの半導体素子20のゲート電極23とエミッタ電極22との間に所定の電圧が印加され、2つの半導体素子20のコレクタ電極21とエミッタ電極22との間に所定の電圧が印加される。
図9では、半導体装置10の動作時に流れる電流を太矢印で模式的に示している。図9には便宜上、ワイヤ71及びワイヤ72、ランド61及びランド62、ワイヤ61a及びワイヤ62aを、点線で模式的に図示している。
また、半導体装置10では、動作に伴って半導体素子20が発熱する。半導体装置10は、半導体素子20の両主面側にそれぞれ基板30及び基板40が設けられ、それらの外側の導体層33及び導体層42が共に樹脂100から露出する構成を有する。半導体装置10では、片方の主面側にのみ基板、及び樹脂100から露出する導体層が設けられる場合に比べて、半導体素子20の放熱効率、冷却効率が高められる。これにより、半導体素子20の過熱が抑えられ、過熱による半導体素子20の破損を抑えることが可能になり、また、半導体素子20に流す電流の大電流化が可能になる。
図11及び図12は第2の実施の形態に係る半導体装置の第1の接続例について説明する図である。図11(A)及び図11(B)には、並列接続された半導体装置群の一例の、端子側から見た要部平面図を模式的に示している。図12には、並列接続された半導体装置群の等価回路図を示している。
図13は第2の実施の形態に係る半導体装置の第2の接続例について説明する図である。図13には、直列接続された半導体装置群の等価回路図を示している。
例えば、図14(A)に示すように、半導体装置10には、4つの半導体素子20が設けられてもよい。4つの半導体素子20には、同種の半導体素子20が用いられてもよいし、異種の半導体素子20が用いられてもよい。例えば、4つの半導体素子20に、RC-IGBTが用いられる。この場合、4つの半導体素子20のコレクタ電極21が、正極端子34の設けられる基板30の導体層32に接続され、4つの半導体素子20のエミッタ電極22が、図示しない負極端子44の設けられる基板40の導体層43に接続される。4つの半導体素子20のゲート電極23が、ワイヤ71を用いてランド61に接続され、そのランド61が、ワイヤ61aを用いて制御端子81に接続される。4つの半導体素子20のエミッタ電極22が、ワイヤ72を用いてランド62に接続され、そのランド62が、ワイヤ62aを用いて制御端子82に接続される。これにより、RC-IGBTの4つの半導体素子20が並列接続された半導体装置10が実現される。
尚、このほか、8つ以上の偶数個の半導体素子20が搭載された半導体装置10を得ることもできる。また、3つ以上の奇数個の半導体素子20が搭載された半導体装置10を得ることもできる。
図15は第3の実施の形態に係る半導体装置の一例について説明する図である。図15には、半導体装置の一例の要部断面図を模式的に示している。
尚、上記第2の実施の形態(図11~図13)の例に従い、この第3の実施の形態で述べたような半導体装置10Aを複数、並列接続又は直列接続することが可能である。
図16は第4の実施の形態に係る半導体装置の一例について説明する図である。図16(A)及び図16(B)には、半導体装置の一例の要部分解平面図を模式的に示している。
[第5の実施の形態]
図17は第5の実施の形態に係る半導体装置の一例について説明する図である。図17には、半導体装置の一例の要部平面図を模式的に示している。また、図18は第5の実施の形態に係る半導体装置の制御端子の一例について説明する図である。図18(A)には、制御端子の一例の要部平面図を模式的に示し、図18(B)には、制御端子の一例の要部側面図を模式的に示し、図18(C)には、制御端子の一例の要部底面図を模式的に示している。
半導体素子20のOFFからONへの切り替え時にはON電圧が印加され、制御端子80の配線85bから、スルーホール85e、配線85c、スルーホール85d及び配線85aを通じ、更にワイヤ61a、ランド61及びワイヤ71を通じて、2つの半導体素子20のゲート電極23にゲートを充電するための所定の電流が流入する。2つの半導体素子20のエミッタ電極22から、ワイヤ72、ランド62及びワイヤ62aを通じて、制御端子80の配線84に所定の電流が流出される。即ち、制御端子80の配線85bから半導体素子20に流入し、半導体素子20から制御端子80の配線84に流出される、制御電流が流れる。
また、上記第2の実施の形態(図11~図13)の例に従い、この第5の実施の形態で述べたような半導体装置10Bを複数、並列接続又は直列接続することが可能である。
図20は第6の実施の形態に係る半導体装置の一例について説明する図である。図20(A)及び図20(B)にはそれぞれ、半導体装置の一例の要部断面図を模式的に示している。
図20(B)に示す半導体装置10Dは、上記第2の実施の形態で述べた半導体装置10(図6等)の、樹脂100並びにそこから露出する基板30の導体層33及び基板40の導体層42の上に、熱界面材料140を介して、冷却部材160が設けられた構成を有する。半導体装置10Dの冷却部材160は、本体部161と、本体部161内に設けられて液体又は気体の冷媒が流通される冷媒流路162とを備える。
ここでは、上記第2の実施の形態で述べた半導体装置10に冷却部材150又は冷却部材160を設ける例を示した。このほか、上記第3の実施の形態で述べた半導体装置10A(図15)、上記第4の実施の形態で述べた半導体装置(図16)、上記第5の実施の形態で述べた半導体装置10B(図17等)にも同様に、冷却部材150又は冷却部材160を設けることが可能である。半導体装置10等には、上記のような冷却部材150、冷却部材160のほか、内部に封入された作動液の蒸発及び凝縮を利用する冷却部材等、各種冷却部材を設けることが可能である。
図21は第7の実施の形態に係る半導体装置の一例について説明する図である。図21(A)~図21(C)にはそれぞれ、半導体装置の一例の要部断面図を模式的に示している。
また、上記第2の実施の形態(図11~図13)の例に従い、この第7の実施の形態で述べたような半導体装置10E、半導体装置10Ea又は半導体装置10Ebを複数、並列接続又は直列接続することが可能である。
2,20 半導体素子
2a 正極電極
2b 負極電極
2c 制御電極
2d IGBT
2e FWD
3,4,32,33,42,43 導体層
3a,34 正極端子
3b,3c,4b,4c,32a,43a 縁部
3d 切り欠き部
4a,44 負極端子
5 接合材料
6 制御配線
7,61a,62a,71,72 ワイヤ
8,81,82 制御端子
8a,81a,82a 端部
9a,90a 制御電流
9b,90b 主電流
11,12 構造体
21 コレクタ電極
22 エミッタ電極
23 ゲート電極
30,40 基板
30E,40E 導体板
31,41 絶縁板
31a,31b,41a,41b,83a,83b 主面
32b 開口部
51,52,54 接合材
53 金属ブロック
61,62 ランド
83,170 絶縁層
84,85a,85b,85c,86,87,110,120,131,132 配線
85d,85e スルーホール
86a,87a 電磁界
88 重なり部分
100 樹脂
140 熱界面材料
150,160 冷却部材
151 フィン
161 本体部
162 冷媒流路
D1,D2 方向
Claims (10)
- 第1導体層と、
前記第1導体層と対向する第2導体層と、
前記第1導体層と前記第2導体層との間に設けられ、第1制御電極と、前記第1導体層と電気的に接続された第1正極電極と、前記第2導体層と電気的に接続された第1負極電極とを有する第1半導体素子と、
平面視で前記第1導体層の第1方向の縁部に設けられた正極端子と、
平面視で前記第2導体層の前記第1方向の縁部に設けられた負極端子と、
前記第1制御電極と電気的に接続され、平面視で前記第1導体層及び前記第2導体層の前記第1方向とは反対の第2方向の外側に引き出された制御配線と、
前記制御配線と電気的に接続され、平面視で前記第1導体層及び前記第2導体層の外側に位置し、前記正極端子及び前記負極端子と並設される端部を有する制御端子と
を含む半導体モジュールを備えることを特徴とする半導体装置。 - 前記制御配線は、
前記第1制御電極と電気的に接続され、前記第1導体層及び前記第2導体層から分離されたランドと、
前記ランドと前記制御端子とを電気的に接続するワイヤと
を有することを特徴とする請求項1に記載の半導体装置。 - 前記半導体モジュールは、前記第1導体層と前記第2導体層との間に設けられ、第2制御電極と、前記第1導体層と電気的に接続された第2正極電極と、前記第2導体層と電気的に接続された第2負極電極とを有する第2半導体素子を更に含み、
前記ランドは、平面視で前記第1半導体素子と前記第2半導体素子との間に設けられ、前記第1制御電極と前記第2制御電極とに電気的に接続されることを特徴とする請求項2に記載の半導体装置。 - 前記半導体モジュールは、主面に前記第1導体層が設けられた第1絶縁板を更に含み、
前記ランドは、前記第1絶縁板の前記主面に設けられる請求項2又は3に記載の半導体装置。 - 前記第1制御電極は、ゲート電極とセンス電極とを有し、
前記制御配線は、前記ゲート電極と電気的に接続されたゲート配線と、前記センス電極と電気的に接続されたセンス配線とを有し、
前記制御端子は、前記ゲート配線と電気的に接続されたゲート端子線と、前記センス配線と電気的に接続されたセンス端子線とを有することを特徴とする請求項1乃至4のいずれかに記載の半導体装置。 - 前記制御端子は、平面視で前記ゲート端子線の一部と前記センス端子線の一部とが重複し、重複する前記ゲート端子線の一部と前記センス端子線の一部との間に介在された絶縁層を有することを特徴とする請求項5に記載の半導体装置。
- 前記半導体モジュールは、前記第1負極電極が前記センス電極と一体であることを特徴とする請求項5又は6に記載の半導体装置。
- 前記半導体モジュールは、主面に前記第1導体層が設けられた第1絶縁板を更に含み、
前記制御端子は、前記第1絶縁板の前記主面に設けられる請求項1乃至7のいずれかに記載の半導体装置。 - 前記制御端子の前記端部、前記正極端子及び前記負極端子は、前記半導体モジュールの、前記第1方向の縁部側から見て千鳥配置となるように並設されることを特徴とする請求項1乃至8のいずれかに記載の半導体装置。
- 並列接続又は直列接続された複数の前記半導体モジュールを含むことを特徴とする請求項1乃至9のいずれかに記載の半導体装置。
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