JP7181341B2 - 電力半導体素子および電力半導体チップ - Google Patents
電力半導体素子および電力半導体チップ Download PDFInfo
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Description
100 電力半導体素子
105 半導体層
107 ドリフト領域
110 ウェル領域
112 エミッタ領域
118 ゲート絶縁層
120 ゲート電極層
125 フローティング領域
130 絶縁層
Claims (6)
- 半導体層と、
前記半導体層の表面から前記半導体層の内部に所定の深さだけ窪むように形成され、第1の深さを有する一対のライン部および前記一対のライン部の間を連結し、前記第1の深さよりも浅い第2の深さを有する複数の連結部を含むラダー形状を有する少なくとも1つのトレンチと、
前記少なくとも1つのトレンチの前記一対のライン部の間および前記複数の連結部の間の前記半導体層に位置するウェル領域と、
前記一対のライン部のうち少なくとも一方に接するように形成されるフローティング領域と、
前記少なくとも1つのトレンチの内壁上に形成されたゲート絶縁層と、
前記少なくとも1つのトレンチを埋め立てるように前記ゲート絶縁層上に形成され、前記一対のライン部を埋め立てて形成された第1の部分および前記複数の連結部を埋め立てて形成された第2の部分を含み、前記第2の部分の深さが前記第1の部分の深さよりも浅いゲート電極層と、
前記ウェル領域下部の前記半導体層に位置するドリフト領域と、を含み、
前記フローティング領域は、前記ライン部のうち少なくとも一方の底面全体を取り囲むように伸張され、該少なくとも一方の底面を前記ドリフト領域と分離し、
前記連結部の底面は、前記フローティング領域と離隔される、電力半導体素子。 - 前記少なくとも1つのトレンチの前記連結部のそれぞれの幅は、前記一対のライン部のそれぞれの幅よりも大きく、
前記ゲート電極層の前記第2の部分の幅は、前記第1の部分の幅よりも大きい、請求項1に記載の電力半導体素子。 - 前記ゲート電極層の前記第2の部分の深さは、前記ウェル領域よりも深い、請求項1に記載の電力半導体素子。
- 前記ウェル領域内の前記ゲート電極層の前記第2の部分に隣接して、前記ゲート電極層の前記第1の部分の延び方向に沿って離隔配置されたソース領域またはエミッタ領域をさらに含む、請求項1に記載の電力半導体素子。
- 前記ドリフト領域および前記ソース領域またはエミッタ領域は、第1導電型の不純物でドーピングされ、
前記ウェル領域および前記フローティング領域は、前記第1導電型の反対である第2導電型の不純物でドーピングされる、請求項4に記載の電力半導体素子。 - メインセル領域およびセンサ領域を含む半導体層と、
前記メインセル領域に形成され、請求項1~5のいずれか1項に記載の電力半導体素子を含む複数の電力半導体トランジスタと、
前記電力半導体トランジスタの電流をモニタリングするために、前記センサ領域に形成された複数の電流センサトランジスタと、
前記複数の電力半導体トランジスタのエミッタ電極と連結されるエミッタ端子と、
前記複数の電流センサトランジスタのエミッタ電極と連結される電流センサ端子と、
前記電力半導体トランジスタのゲート電極および前記複数の電流センサトランジスタのゲート電極と連結されるゲート端子とを含む、電力半導体チップ。
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KR1020200058261A KR102315054B1 (ko) | 2020-05-15 | 2020-05-15 | 전력 반도체 소자 및 전력 반도체 칩 |
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JP (1) | JP7181341B2 (ja) |
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JP2002083963A (ja) | 2000-06-30 | 2002-03-22 | Toshiba Corp | 半導体素子 |
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US7449354B2 (en) * | 2006-01-05 | 2008-11-11 | Fairchild Semiconductor Corporation | Trench-gated FET for power device with active gate trenches and gate runner trench utilizing one-mask etch |
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JP2018129358A (ja) * | 2017-02-07 | 2018-08-16 | ルネサスエレクトロニクス株式会社 | 電流検出装置、負荷駆動システム、及び、電流検出装置の製造方法 |
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