JP7198168B2 - パワー半導体モジュール - Google Patents
パワー半導体モジュール Download PDFInfo
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- JP7198168B2 JP7198168B2 JP2019133942A JP2019133942A JP7198168B2 JP 7198168 B2 JP7198168 B2 JP 7198168B2 JP 2019133942 A JP2019133942 A JP 2019133942A JP 2019133942 A JP2019133942 A JP 2019133942A JP 7198168 B2 JP7198168 B2 JP 7198168B2
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Description
次に、本実施例を用いてスイッチング時のパワー半導体モジュールのゲート制御性を向上できることを説明する。図3は、図1に示すパワー半導体モジュールに相当する簡易等価回路601である。上アーム回路について、その構成を以下に述べる。MOSFET型パワー半導体チップを表す3つのMOSFETシンボルM11~M13のゲートをボンディングワイヤの等価表現であるインダクタンスLg1とLg2を介して接続し、同様に、ソースセンスをインダクタンスLss1とLss2を介して接続する。
9,10:半田接合層
11~16,21~26:パワー半導体チップ
31~34,35A~35C,41~44,45A~45C:ボンディングワイヤ
36,46:ゲート配線用ワイヤ
37,47:ソース配線用ワイヤ
51,63A,63B,64:端子(基板上の端子給電点)
52,62:端子(基板上の電位モニタ用給電点)
71A,71B:スリットパターン
91,93:ゲート制御端子
92,94:ソースセンス制御端子
95,97:(チップ間ゲート接続用)導体
96,98:(チップ間ソースセンス接続用)導体
99:絶縁基板
100~103:パワー半導体チップ搭載基板
300:ベースプレート
310:樹脂ケース
501:(パワー半導体チップの)ゲート電極パッド
502:(パワー半導体チップの)ソース電極パッド
601,602,603:(簡易)等価回路
Mg1~Mg6,M16,M25,M34:相互インダクタンス
Ld1~Ld6:MOSFETドレイン経路の寄生インダクタンス
Ls1~Ls6:MOSFETソース主電流経路の寄生インダクタンス
Lg1~Lg6:MOSFETゲート経路の寄生インダクタンス
Lss1~Lss6:MOSFETソース制御経路の寄生インダクタンス
Rgc11~Rgc13,Rgc21~Rgc23:MOSFETチップ内部のゲート経路の抵抗値
Claims (10)
- 絶縁基板と、
前記絶縁基板上に配置された第1の導電パターンと、
前記第1の導電パターン上に配置された複数のパワー半導体チップと、
前記複数のパワー半導体チップの各々のゲート電極同士を直接接続する架橋形状の第1の配線と、
前記複数のパワー半導体チップの各々のソース電極同士を直接接続する架橋形状の第2の配線と、
前記第1の導電パターンと電気的に絶縁してケース上に配置されたゲート制御端子と、
前記第1の導電パターンと分離して前記ケース上に配置されたソースセンス制御端子と、を備え、
前記第1の配線は、前記第2の配線と成す角度が30度以内で前記第2の配線に沿って配置され、かつ、前記絶縁基板上の他の導電パターンを介さずに前記ゲート制御端子に接続され、
前記第2の配線は、前記絶縁基板上の他の導電パターンを介さずに前記ソースセンス制御端子に接続されることを特徴とするパワー半導体モジュール。 - 請求項1に記載のパワー半導体モジュールであって、
前記複数のパワー半導体チップは、前記第1の導電パターン上において、一定数のチップ毎に複数のチップ群として配置されており、
各チップ群の前記第1の配線は、共通のゲート制御端子に接続され、
各チップ群の前記第2の配線は、共通のソースセンス制御端子に接続されることを特徴とするパワー半導体モジュール。 - 請求項1に記載のパワー半導体モジュールであって、
前記絶縁基板上に配置された第2の導電パターンと、
前記第2の導電パターン上に配置された複数のパワー半導体チップと、
前記第2の導電パターン上の複数のパワー半導体チップの各々のゲート電極同士を直接接続する架橋形状の第3の配線と、
前記第2の導電パターン上の複数のパワー半導体チップの各々のソース電極同士を直接接続する架橋形状の第4の配線と、を備え、
前記第3の配線は、前記第4の配線と成す角度が30度以内で前記第4の配線に沿って配置されることを特徴とするパワー半導体モジュール。 - 請求項3に記載のパワー半導体モジュールであって、
前記第1の導電パターンと前記第2の導電パターンとの間に、第3の導電パターンが前記第2の導電パターンに隣接して配置されており、
前記第2の導電パターンおよび前記第3の導電パターンのそれぞれの導電パターンを流れる電流方向が180°異なる部分が存在することを特徴とするパワー半導体モジュール。 - 請求項4に記載のパワー半導体モジュールであって、
前記第2の導電パターンは、前記第1の導電パターン上の複数のパワー半導体チップのソース電極と複数のボンディングワイヤで接続され、前記第2の導電パターンとボンディングワイヤとの接続点および前記第2の導電パターンの給電点との間にソース電流経路のインダクタンスばらつきを低減するL字形状またはI字形状の第1のスリットパターンを有し、
前記第3の導電パターンは、前記第2の導電パターン上の複数のパワー半導体チップのソース電極と複数のボンディングワイヤで接続され、前記第3の導電パターンとボンディングワイヤとの接続点および前記第3の導電パターンの給電点との間にソース電流経路のインダクタンスばらつきを低減するL字形状またはI字形状の第2のスリットパターンを有することを特徴とするパワー半導体モジュール。 - 請求項5に記載のパワー半導体モジュールであって、
前記第1のスリットパターンと前記第2のスリットパターンは、点対称の位置に配置されることを特徴とするパワー半導体モジュール。 - 請求項1に記載のパワー半導体モジュールであって、
前記複数のパワー半導体チップの各々は、電流スイッチング機能および還流機能を共に有することを特徴とするパワー半導体モジュール。 - 請求項1に記載のパワー半導体モジュールであって、
前記複数のパワー半導体チップの各々は、ゲート電極パッドからチップ内部を見込んだインピーダンスにおいて、所定の抵抗値を有する内蔵抵抗を備えることを特徴とするパワー半導体モジュール。 - 請求項8に記載のパワー半導体モジュールであって、
前記複数のパワー半導体チップの各々は、ポリシリコン製の内蔵抵抗を備えることを特徴とするパワー半導体モジュール。 - 請求項1から9のいずれか1項に記載のパワー半導体モジュールであって、
前記複数のパワー半導体チップは、SiCパワー半導体チップであることを特徴とするパワー半導体モジュール。
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