JP7248189B2 - 半導体回路装置 - Google Patents
半導体回路装置 Download PDFInfo
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- JP7248189B2 JP7248189B2 JP2022500257A JP2022500257A JP7248189B2 JP 7248189 B2 JP7248189 B2 JP 7248189B2 JP 2022500257 A JP2022500257 A JP 2022500257A JP 2022500257 A JP2022500257 A JP 2022500257A JP 7248189 B2 JP7248189 B2 JP 7248189B2
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Description
実施の形態1にかかる半導体回路装置は、シリコン(Si)よりもバンドギャップが広い半導体(ワイドバンドギャップ半導体)を半導体材料として用いて構成されるパワーモジュールまたはIPMである。実施の形態1にかかる半導体回路装置の構造について、ワイドバンドギャップ半導体として例えば炭化珪素(SiC)を用いた場合を例に説明する。図1~3は、実施の形態1にかかる半導体回路装置の絶縁基板に実装される半導体チップをおもて面側から見たレイアウトの一例を示す平面図である。
次に、実施の形態2にかかる半導体回路装置について説明する。図17,18は、実施の形態2にかかる半導体回路装置の絶縁基板に実装される半導体チップをおもて面側から見たレイアウトの一例を示す平面図である。実施の形態2にかかる半導体回路装置の絶縁基板に実装される半導体チップ120が実施の形態1にかかる半導体回路装置の絶縁基板に実装される半導体チップ10(図1~3参照)と異なる点は、同一の半導体チップ10の活性領域1に、メイン半導体素子11のみを備える点である。
上述した実施の形態1にかかる半導体回路装置100(図1~10参照)の電流波形について検証した。図19は、実施例のターンオフ時の電圧波形および電流波形を示す特性図である。図20は、従来例のターンオフ時の電圧波形および電流波形を示す特性図である。上述した実施の形態1にかかる半導体回路装置100(以下、実施例とする:図1,2,4,5,6,9,10参照)のターンオフ時のドレイン・ソース間電流Idsの電流波形131、ドレイン・ソース間電圧Vdsの電圧波形132、およびゲート電圧Vgの電圧波形133を図19に示す。
、ターンオフ時のドレイン・ソース間電流Idsの電流波形131の振動を抑制することができることが確認された。
1a メイン有効領域
1b メイン無効領域
2 エッジ終端領域
10,10a,10b,10c 半導体チップ
11 メイン半導体素子
12 電流センス部
12a センス有効領域
12b センス無効領域
13 温度センス部
14 ゲートパッド部
15,94a,94a’,94b,94b’ 抵抗体
16 ゲート抵抗
17 ソース配線
18 ドレイン配線
19 ゲート配線
20 半導体装置
21a ソースパッド(電極パッド)
21b ゲートパッド(電極パッド)
22 OCパッド(電極パッド)
23a アノードパッド(電極パッド)
23b カソードパッド(電極パッド)
31 n+型出発基板
32 n-型ドリフト領域
32a n-型領域
33a,33b n型電流拡散領域
34a,34b p型ベース領域
35a,35b n+型ソース領域
36a,36b p++型コンタクト領域
37a,37b トレンチ
38a,38b ゲート絶縁膜
39a,39b ゲート電極
40,75 層間絶縁膜
40a,40b,75a,75b コンタクトホール
41a,41b,41e NiSi膜
42a,42b,42e 第1TiN膜
43a,43b,43e 第1Ti膜
44a,44b,44e 第2TiN膜
45a,45b,45e 第2Ti膜
46a,46b,46e バリアメタル
47a~47e めっき膜
48a~48e 端子ピン
49a~49c,49e 第1保護膜
50a~50c,50e 第2保護膜
51 ドレイン電極
61a,61b,62a,62b,101,103 p+型領域
71 n-型炭化珪素層
71a n-型炭化珪素層の厚さを増した部分
72 p型炭化珪素層
73 p型ポリシリコン層
74 n型ポリシリコン層
80 絶縁基板
81 絶縁板
82 銅板
83 放熱板
84,85 はんだ層
86,86a,87 インプラントピン
86’,87’ ワイヤー
88a,88b 外部電極用端子
89 封止材
90 プリント基板
91a ソースパッド
91b,91b’ ゲートパッド
92,92’ OCパッド
93a,93a’ アノードパッド
93b,93b’ カソードパッド
95a,95a’,95b,95b’,96,96’ 配線
100 半導体回路装置
100a~100b 接続点
102,104 n型領域
GND 接地点
d1 p+型領域の深さ
d2 互いに隣り合うp+型領域間の距離
d3 n型領域の深さ
t1 n-型炭化珪素層の、n+型出発基板上に最初に積層する厚さ
t2 n-型炭化珪素層の、厚さを増した部分の厚さ
t3 p型炭化珪素層の厚さ
X 半導体チップのおもて面に平行な方向(第1方向)
Y 半導体チップのおもて面に平行でかつ第1方向と直交する方向(第2方向)
Z 深さ方向
Claims (3)
- シリコンよりもバンドギャップの広い半導体からなる複数の半導体チップと、
複数の前記半導体チップのそれぞれに設けられた複数の半導体素子と、
複数の前記半導体チップのそれぞれにおいて、おもて面に互いに離れて配置され、それぞれ異なる前記半導体素子に電気的に接続された複数の電極パッドと、
複数の前記半導体チップが互いに離れて接合された第1基板と、
複数の前記半導体チップ間において、前記半導体素子の同じ部分に接続される前記電極パッド同士を並列接続する金属部材と、
を備え、
複数の前記半導体チップのうち、少なくとも1つの前記半導体チップの前記電極パッドのレイアウトは残りの前記半導体チップの前記電極パッドのレイアウトと異なっており、
前記金属部材を介して並列接続された前記電極パッドの間の抵抗成分もしくはリアクタンス成分、またはその両方が均一になる所定のレイアウトに、前記半導体チップのおもて面の前記電極パッドのレイアウトと、前記第1基板の上の複数の前記半導体チップのレイアウトと、が設定され、
前記金属部材を介して並列接続された前記電極パッドを前記第1基板の上に均等な距離で配置することで、前記金属部材を介して並列接続された前記電極パッドの間の抵抗成分もしくはリアクタンス成分、またはその両方を均一にし、
前記金属部材は金属ワイヤーであることを特徴とする半導体回路装置。 - シリコンよりもバンドギャップの広い半導体からなる複数の半導体チップと、
複数の前記半導体チップのそれぞれに設けられた複数の半導体素子と、
複数の前記半導体チップのそれぞれにおいて、おもて面に互いに離れて配置され、それぞれ異なる前記半導体素子に電気的に接続された複数の電極パッドと、
複数の前記半導体チップが互いに離れて接合された第1基板と、
複数の前記半導体チップ間において、前記半導体素子の同じ部分に接続された前記電極パッド同士を並列接続する金属部材と、
を備え、
複数の前記半導体チップのうち、少なくとも1つの前記半導体チップの前記電極パッドのレイアウトは残りの前記半導体チップの前記電極パッドのレイアウトと異なっており、
前記金属部材を介して並列接続された前記電極パッドの間の抵抗成分もしくはリアクタンス成分、またはその両方が均一になる所定のレイアウトに、前記半導体チップのおもて面の前記電極パッドのレイアウトと、前記第1基板の上の複数の前記半導体チップのレイアウトと、が設定され、
前記金属部材は、
前記電極パッドの電位を取り出す端子ピンと、
複数の前記半導体チップのおもて面に対向して配置された第2基板に形成された金属配線と、であり、
複数の前記半導体チップ間において前記半導体素子の同じ部分にそれぞれ接続された前記電極パッドにそれぞれ異なる前記端子ピンが接合され、当該異なる前記端子ピンが前記金属配線を介して接続され、
同じ前記電極パッドに複数の前記端子ピンが接合され、
同じ前記電極パッドに接合された複数の前記端子ピンのうちの一部の前記端子ピンは、一部を折り曲げてなるリアクタンス成分が付加されていることを特徴とする半導体回路装置。 - 前記第2基板に形成され、前記金属配線に電気的に接続された抵抗体をさらに備えることを特徴とする請求項2に記載の半導体回路装置。
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