JP5921055B2 - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
- Publication number
- JP5921055B2 JP5921055B2 JP2010050806A JP2010050806A JP5921055B2 JP 5921055 B2 JP5921055 B2 JP 5921055B2 JP 2010050806 A JP2010050806 A JP 2010050806A JP 2010050806 A JP2010050806 A JP 2010050806A JP 5921055 B2 JP5921055 B2 JP 5921055B2
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- Prior art keywords
- semiconductor chip
- diode
- mosfet
- power mosfet
- main surface
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Description
本発明の一実施の形態の半導体装置を図面を参照して説明する。
図1は、本発明の一実施の形態である半導体装置PKGの上面図(平面図)であり、図2は、半導体装置PKGの下面図(平面図)であり、図3、図4および図5は、半導体装置PKGの断面図であり、図6〜図8は、半導体装置PKGの平面透視図(上面図)である。図6のA1−A1線の位置での半導体装置PKGの断面が図3にほぼ対応し、図6のA2−A2線の位置での半導体装置PKGの断面が図4にほぼ対応し、図6のA3−A3線の位置での半導体装置PKGの断面が図5にほぼ対応する。また、図6には、封止部MRを透視したときの半導体装置PKGの上面側の平面透視図が示されている。また、図7は、図6において、更に金属板MPL1,MPL2を透視(省略)したときの半導体装置PKGの平面透視図(上面図)である。また、図8は、図7において、更にボンディングワイヤBWおよび半導体チップCP1,CP2を透視(省略)したときの半導体装置PKGの平面透視図(上面図)である。
次に、半導体装置PKGの回路構成について説明する。図11は、半導体装置PKGの使用例を示す回路ブロック図である。図11において、点線で囲まれた部分が半導体装置PKGで構成された部分であり、一点鎖線で囲まれた部分が半導体チップCP1で構成された部分であり、二点鎖線で囲まれた部分が半導体チップCP2で構成された部分である。
次に、半導体チップCP1のチップレイアウトについて、図12および図13を参照しながら説明する。
次に、上記パワーMOSFETQ1,Q2およびダイオードDD1,DD2が形成された半導体チップCP1の構成について、より詳細に説明する。
次に、半導体チップCP1におけるダイオードDD1,DD2の位置について、より詳細に説明する。
本実施の形態では、ダイオードDD1,DD2の誤動作をできるだけ防止できるようにするために、ダイオードDD1,DD2の配置位置だけでなく、パッド電極PDの配置位置についても工夫している。
図30および図31は、パワーMOSFETQ1,Q2を形成した半導体チップにおける温度変化をシミュレーションした結果を示すグラフである。図30には、本実施の形態の半導体チップCP1に対応する半導体チップにおいて、パワーMOSFETQ2が過剰に発熱したときの、上記図23示される位置C1に対応する位置での温度変化と上記図23示される位置C2に対応する位置での温度変化とが示されている。図31は、図30における0〜0.1秒の間を拡大して示したグラフである。ここで、パワーMOSFETQ2の発熱の開始時点が図30および図31のグラフの横軸の始点(0秒)に対応し、パワーMOSFETQ2の発熱が開始した時点からの経過時間を図30および図31のグラフの横軸としている。また、図30および図31のグラフの縦軸は温度に対応し、上記図23示される位置C1に対応する位置での温度と上記図23示される位置C2に対応する位置での温度とが示されている。また、パワーMOSFETQ1,Q2のうち、パワーMOSFETQ2が発熱しかつパワーMOSFETQ1は発熱しない状態でシミュレーションを行っている。パワーMOSFETQ2の発熱量は、パワーMOSFETQ2をオン状態にしたときにパワーMOSFETQ2に通常流れる電流よりも過剰な電流(例えば上記負荷LA2が短絡したときに流れ得る電流)がパワーMOSFETQ2に流れた場合を仮定している。
図32は、本実施の形態の半導体チップCP1の要部断面図であり、上記実施の形態1の上記図18に対応するものである。上記図18と同様、図32においても、半導体チップCP1において、第1MOSFET領域RG1と第2MOSFET領域RG2との境界を横切る断面図が示されている。
図34は、本実施の形態の半導体チップCP1のチップレイアウトを示す平面図(上面図)であり、上記図12、図13、図26〜図28などに対応するものである。なお、図34は平面図であるが、理解を簡単にするために、パッド電極PDと、ダイオードDD1,DD2,DD3,DD4が形成されている領域とにハッチングを付して示してある。また、図34において、パワーMOSFETQ1に対応する縦型のパワーMOSFETが形成されている領域を、符号Q1を付した点線で囲んで模式的に示し、パワーMOSFETQ2に対応する縦型のパワーMOSFETが形成されている領域を、符号Q2を付した点線で囲んで模式的に示してある。また、図34において、パワーMOSFETQ3に対応する縦型のパワーMOSFETが形成されている領域を、符号Q3を付した点線で囲んで模式的に示し、パワーMOSFETQ4に対応する縦型のパワーMOSFETが形成されている領域を、符号Q4を付した点線で囲んで模式的に示してある。
1a 基板本体
1b エピタキシャル層
2 フィールド絶縁膜
3 半導体領域
4 半導体領域
5 溝
6 ゲート絶縁膜
7 ゲート電極
7a ゲート引き出し用の配線部
8 絶縁膜
9a,9b,9c,9d コンタクトホール
10A アノード配線
10C カソード配線
10G ゲート配線
10S ソース配線
11 半導体領域
12 保護膜
13 開口部
21 多結晶シリコン膜
21a n型シリコン部分
21b p型シリコン部分
22 導電体膜
BD1,BD2,BD3,BD4,BD5,BD6 接着層
BE 裏面電極
BT 電源
BW ボンディングワイヤ
CP1,CP2,CP101a,CP101b,CP201 半導体チップ
DD1,DD2 ダイオード
DP1,DP2 ダイパッド
DR 制御回路
LA1,LA2 負荷
GR ガードリング
LD,LD1,LD2 リード
MPL1,MPL2 金属板
MR 封止部
MRa 上面
MRb 下面
MRc1,MRc2,MRc3,MRc4 側面
OP,OP1 開口部
PD,PD2,PDG1,PDG2,PDC1,PDC2,PDA1,PDA2,PDS1,PDS2,PDN1,PDN2,PDK1,PDK2 パッド電極
PDS101,PDS102 パッド電極
PKG 半導体装置
PWB 実装基板
PWL p型ウエル
Q1,Q2 パワーMOSFET
RG1,RG201 第1MOSFET領域
RG2,RG202 第2MOSFET領域
SD1,SD2,SD3,SD4,SD5,SD6,SD201,SD202 辺
SL 半田
TE,TE1 端子
TL 吊リード
Claims (11)
- 第1辺と、前記第1辺に対向する第2辺と、前記第1および第2辺に交差する第3辺と、前記第3辺に対向する第4辺とを有する第1半導体チップを備えた半導体装置であって、
前記第1半導体チップには、第1回路と、第2回路と、前記第1回路の発熱を検知するための第1ダイオードと、前記第2回路の発熱を検知するための第2ダイオードと、複数の第1パッド電極とが形成されており、
前記第1回路は、前記第1半導体チップの主面において前記第2辺よりも前記第1辺に近くなるように配置され、
前記第2回路は、前記第1半導体チップの主面において前記第1回路と前記第2辺との間に配置され、
前記第1ダイオードは、前記第1半導体チップの主面において、前記第1ダイオードから前記第2回路までの距離よりも前記第1ダイオードから前記第1辺までの距離が小さくなるように配置され、
前記第2ダイオードは、前記第1半導体チップの主面において、前記第2ダイオードから前記第1回路までの距離よりも前記第2ダイオードから前記第2辺までの距離が小さくなるように配置されており、
前記複数の第1パッド電極は、前記第1回路に電気的に接続された第1ソース用パッド電極と、前記第2回路に電気的に接続された第2ソース用パッド電極とを含み、
前記第1および第2ソース用パッド電極は、前記第1および第2ソース用パッド電極を除く前記複数の第1パッド電極よりも平面積が大きく、
前記第1ソース用パッド電極は、前記第1回路の上部に形成され、
前記第2ソース用パッド電極は、前記第2回路の上部に形成され、
前記第1ダイオードは、前記第1半導体チップの主面において前記第1辺に沿って配置され、
前記第2ダイオードは、前記第1半導体チップの主面において前記第2辺に沿って配置され、
前記第1ダイオードは、前記第1半導体チップの主面において前記第1辺と前記第3辺とで形成される第1角部近傍に配置され、
前記第2ダイオードは、前記第1半導体チップの主面において前記第2辺と前記第3辺とで形成される第2角部近傍に配置され、
前記第1および第2ソース用パッド電極を除く前記複数の第1パッド電極は、前記第1半導体チップの主面において、前記第1ダイオードと前記第2ダイオードとの間に、前記第3辺に沿って配置されており、
前記第1回路および前記第2回路は、それぞれ、トレンチゲート型MISFETによって形成されており、
前記第1半導体チップを構成する半導体基板の主面において、前記第1回路用のトレンチゲート型MISFETが形成された領域と、前記第2回路用のトレンチゲート型MISFETが形成された領域との間に、浮遊電位の導電体が埋め込まれた第1溝が形成されている、半導体装置。 - 請求項1に記載の半導体装置において、
前記複数の第1パッド電極のうち、前記第1回路または前記第1ダイオードに電気的に接続された前記第1パッド電極は、前記第1半導体チップの主面において前記第2辺よりも前記第1辺に近くなるように配置され、
前記複数の第1パッド電極のうち、前記第2回路または前記第2ダイオードに電気的に接続された前記第1パッド電極は、前記第1半導体チップの主面において前記第1辺よりも前記第2辺に近くなるように配置されている、半導体装置。 - 請求項2に記載の半導体装置において、
前記第1および第2ソース用パッド電極は、前記第1半導体チップの主面において前記第1および第2ソース用パッド電極を除く前記複数の第1パッド電極と前記第4辺との間に配置されており、
前記第1ソース用パッド電極は、前記第1半導体チップの主面において前記第2辺よりも前記第1辺に近くなるように配置され、
前記第2ソース用パッド電極は、前記第1半導体チップの主面において前記第1ソース用パッド電極と前記第2辺との間に配置されている、半導体装置。 - 請求項3に記載の半導体装置において、
前記複数の第1パッド電極は、前記第1回路に電気的に接続された第1ゲート用パッド電極と、前記第1ダイオードに電気的に接続された第1アノード用パッド電極および第1カソード用パッド電極と、前記第2回路に電気的に接続された第2ゲート用パッド電極と、前記第2ダイオードに電気的に接続された第2アノード用パッド電極および第2カソード用パッド電極とを含む、半導体装置。 - 請求項4に記載の半導体装置において、
前記複数の第1パッド電極のうち、前記第1ダイオードと前記第2ダイオードとの間に配置された前記複数の第1パッド電極には、複数のワイヤがそれぞれ電気的に接続されている、半導体装置。 - 請求項5に記載の半導体装置において、
前記第1半導体チップを制御するための第2半導体チップを更に備え、
前記第2半導体チップは、前記第1半導体チップの前記第4辺よりも前記第3辺に近くなるように配置されており、
前記第2半導体チップは、前記複数のワイヤがそれぞれ電気的に接続された複数の第2パッド電極を有する、半導体装置。 - 請求項6に記載の半導体装置において、
前記第2半導体チップは、第5辺を有し、
前記第1半導体チップの前記第3辺に前記第2半導体チップの前記第5辺が対向するように、前記第1および第2半導体チップが配置されており、
前記複数の第2パッド電極は、前記第2半導体チップの主面において前記第5辺に沿って配置されている、半導体装置。 - 請求項7に記載の半導体装置において、
前記第1半導体チップは、ドレイン用の裏面電極を有しており、
前記裏面電極は、前記第1回路のドレインと前記第2回路のドレインとに電気的に接続されている、半導体装置。 - 請求項8に記載の半導体装置において、
前記第1回路および前記第2回路は、それぞれスイッチ用のMISFETであり、互いに独立に制御可能である、半導体装置。 - 請求項9に記載の半導体装置において、
前記第1溝は、前記トレンチゲート型MISFETのトレンチゲートを構成する溝と同工程で形成された溝である、半導体装置。 - 第1辺と、前記第1辺に対向する第2辺と、前記第1および第2辺に交差する第3辺と、前記第3辺に対向する第4辺とを有する第1半導体チップを備えた半導体装置であって、
前記第1半導体チップには、3以上の整数であるn個の第1回路と、前記n個の第1回路の発熱をそれぞれ検知するためのn個のダイオードと、複数のパッド電極とが形成されており、
前記第1半導体チップの主面において前記第1辺から前記第2辺に向かって、前記n個の第1回路が順に並んで配置されており、
前記n個の第1回路のうちの前記第1辺に最も近い第1番目の前記第1回路の発熱を検知するための第1番目の前記ダイオードは、前記第1半導体チップの主面において、前記第1番目の前記ダイオードから前記第1番目の前記第1回路に隣接する第2番目の前記第1回路までの距離よりも、前記第1番目の前記ダイオードから前記第1辺までの距離が小さくなるように配置され、
前記n個の第1回路のうちの前記第2辺に最も近い第n番目の前記第1回路の発熱を検知するための第n番目の前記ダイオードは、前記第1半導体チップの主面において、前記第n番目の前記ダイオードから前記第n番目の前記第1回路に隣接する第n−1番目の前記第1回路までの距離よりも、前記第n番目の前記ダイオードから前記第2辺までの距離が小さくなるように配置され、
第2番目から第n−1番目の前記第1回路の発熱を検知するための第2番目から第n−1番目の前記ダイオードのそれぞれは、前記第1半導体チップの主面において、発熱を検知すべき前記第1回路の両隣の前記第1回路からの距離がほぼ同じになるように配置され、
前記第1番目の前記ダイオードは、前記第1半導体チップの主面において、前記第1辺に沿って配置され、
前記第n番目の前記ダイオードは、前記第1半導体チップの主面において、前記第2辺に沿って配置され、
前記第1番目の前記ダイオードは、前記第1半導体チップの主面において、前記第1辺と前記第3辺とで形成される第1角部近傍に配置され、
前記第n番目の前記ダイオードは、前記第1半導体チップの主面において、前記第2辺と前記第3辺とで形成される第2角部近傍に配置され、
前記第2番目から第n−1番目の前記ダイオードは、前記第1半導体チップの主面において、前記第3辺に沿って配置され、
前記複数のパッド電極は、前記n個の第1回路にそれぞれ電気的に接続されたn個のソース用パッド電極を含み、
前記n個のソース用パッド電極を除く前記複数のパッド電極は、前記第1半導体チップの主面において、前記第3辺に沿って、前記n個のダイオードの間に配置されており、
前記n個の第1回路は、それぞれ、トレンチゲート型MISFETによって形成されており、
前記第1半導体チップを構成する半導体基板の主面において、前記n個の第1回路のうちの互いに隣り合う2つの前記第1回路の間に、浮遊電位の導電体が埋め込まれた第1溝が形成されている、半導体装置。
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US20130043576A1 (en) | 2013-02-21 |
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