JP7384287B2 - 半導体装置 - Google Patents
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- H01L29/7393—Insulated gate bipolar mode transistors, i.e. IGBT; IGT; COMFET
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Description
特許文献1 特開2017-135339号公報
特許文献2 特開2014-175517号公報
図1Aは、本実施形態の実施例1に係る半導体装置100の部分上面図である。半導体装置100は、IGBT等のトランジスタ素子を含むトランジスタ部70と、還流ダイオード(FWD)等のダイオード素子を含むダイオード部80とを有する半導体基板を備える。図1Aは、トランジスタ部70およびダイオード部80の境界周辺を中心に示す。
図3は、実施例2に係る半導体装置200の部分上面図である。ここで、半導体装置100と共通する要素には同じ符号を付し、説明を省略する。図3は、トランジスタ部70のうち境界領域74を中心に示す。
Claims (12)
- トランジスタ部とダイオード部とを有する半導体基板を備え、
前記半導体基板は、内部に設けられた第1導電型のドリフト領域と、前記半導体基板のおもて面から前記ドリフト領域まで設けられた少なくとも1つのゲートトレンチ部および少なくとも1つのダミートレンチ部と、前記半導体基板のおもて面に設けられた第1導電型のエミッタ領域とを有し、
前記トランジスタ部は、
前記半導体基板の上面視で前記ダイオード部から離間したトランジスタ領域と、
前記半導体基板の上面視で前記トランジスタ領域と前記ダイオード部との間に位置し、前記ドリフト領域において前記半導体基板のおもて面側にライフタイム制御領域を有する境界領域と
を有し、
前記境界領域は、電流抑制構造を有し、
前記境界領域は、前記ダイオード部に隣接する第1メサ部に上面視で第2導電型の引き抜き領域を備え、
前記境界領域は、上面視で前記ゲートトレンチ部および前記ダミートレンチ部の延伸方向に沿って、前記エミッタ領域と前記引き抜き領域とが交互に配置されている第2メサ部をさらに備える
半導体装置。 - トランジスタ部とダイオード部とを有する半導体基板を備え、
前記半導体基板は、内部に設けられた第1導電型のドリフト領域と、前記半導体基板のおもて面から前記ドリフト領域まで設けられた少なくとも1つのゲートトレンチ部および少なくとも1つのダミートレンチ部と、前記半導体基板のおもて面に設けられた第1導電型のエミッタ領域とを有し、
前記トランジスタ部は、
前記半導体基板の上面視で前記ダイオード部から離間したトランジスタ領域と、
前記半導体基板の上面視で前記トランジスタ領域と前記ダイオード部との間に位置し、前記ドリフト領域において前記半導体基板のおもて面側にライフタイム制御領域を有する境界領域と
を有し、
前記境界領域は、電流抑制構造を有し、
前記境界領域は、
上面視で第2導電型のベース領域を備える第1メサ部と、
前記第1メサ部と前記ダミートレンチ部を挟んで隣り合い、第2導電型の引き抜き領域を備える第2メサ部と、
前記第2メサ部の間に挟まれ、前記ゲートトレンチ部および前記ダミートレンチ部の延伸方向に沿って、前記エミッタ領域と前記引き抜き領域とが交互に配置されている第3メサ部とを有する
半導体装置。 - トランジスタ部とダイオード部とを有する半導体基板を備え、
前記半導体基板は、内部に設けられた第1導電型のドリフト領域と、前記半導体基板のおもて面から前記ドリフト領域まで設けられた少なくとも1つのゲートトレンチ部および少なくとも1つのダミートレンチ部と、前記半導体基板のおもて面に設けられた第1導電型のエミッタ領域とを有し、
前記トランジスタ部は、
前記半導体基板の上面視で前記ダイオード部から離間したトランジスタ領域と、
前記半導体基板の上面視で前記トランジスタ領域と前記ダイオード部との間に位置し、前記ドリフト領域において前記半導体基板のおもて面側にライフタイム制御領域を有する境界領域と
を有し、
前記境界領域は、電流抑制構造を有し、
前記境界領域の前記ゲートトレンチ部は、
前記エミッタ領域に接する第1ゲートトレンチ部と、前記エミッタ領域に接していない第2ゲートトレンチ部とを有する
半導体装置。 - トランジスタ部とダイオード部とを有する半導体基板を備え、
前記半導体基板は、内部に設けられた第1導電型のドリフト領域と、前記半導体基板のおもて面から前記ドリフト領域まで設けられた少なくとも1つのゲートトレンチ部および少なくとも1つのダミートレンチ部と、前記半導体基板のおもて面に設けられた第1導電型のエミッタ領域とを有し、
前記トランジスタ部は、
前記半導体基板の上面視で前記ダイオード部から離間したトランジスタ領域と、
前記半導体基板の上面視で前記トランジスタ領域と前記ダイオード部との間に位置し、前記ドリフト領域において前記半導体基板のおもて面側にライフタイム制御領域を有する境界領域と
を有し、
前記境界領域は、電流抑制構造を有し、
前記ライフタイム制御領域は、ドーピング濃度が1×e 10 cm -3 以上、1×e 13 cm -3 以下のライフタイムキラーを含む
半導体装置。 - 前記境界領域では、ゲートトレンチ部の数に対するダミートレンチ部の数の比率であるダミー比率が1より大きい
請求項1から4のいずれか一項に記載の半導体装置。 - 前記境界領域における前記ダミー比率は前記トランジスタ領域における前記ダミー比率より高い
請求項5に記載の半導体装置。 - 前記境界領域における前記ダミー比率は、前記トランジスタ領域における前記ダミー比率の1倍以上、9倍以下である
請求項5に記載の半導体装置。 - 前記境界領域における前記エミッタ領域の比率は、前記トランジスタ領域における前記エミッタ領域の比率より低い
請求項1から7のいずれか一項に記載の半導体装置。 - 前記半導体基板の上面視で、前記トランジスタ部および前記ダイオード部の配列方向における前記境界領域の幅は、50μm以上、150μm以下である
請求項1から8のいずれか一項に記載の半導体装置。 - 前記境界領域の幅は、100μm以上である
請求項9に記載の半導体装置。 - 前記半導体基板の上面視で、前記境界領域の面積は、前記トランジスタ領域の面積の3倍以上である
請求項1から10のいずれか一項に記載の半導体装置。 - 前記ドリフト領域において、前記半導体基板の裏面側に、前記トランジスタ部および前記ダイオード部の全体にわたって裏面ライフタイム制御領域がさらに設けられる
請求項1から11のいずれか一項に記載の半導体装置。
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