JP7232743B2 - 半導体装置及びそれを用いた整流素子、オルタネータ - Google Patents
半導体装置及びそれを用いた整流素子、オルタネータ Download PDFInfo
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- JP7232743B2 JP7232743B2 JP2019193215A JP2019193215A JP7232743B2 JP 7232743 B2 JP7232743 B2 JP 7232743B2 JP 2019193215 A JP2019193215 A JP 2019193215A JP 2019193215 A JP2019193215 A JP 2019193215A JP 7232743 B2 JP7232743 B2 JP 7232743B2
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Computer Hardware Design (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Rectifiers (AREA)
- Metal-Oxide And Bipolar Metal-Oxide Semiconductor Integrated Circuits (AREA)
- Semiconductor Integrated Circuits (AREA)
Description
101…ベース電極
102…台座
103…ツェナーダイオード内蔵MOSFETチップ
104…制御ICチップ
105…コンデンサ
107…リード電極
108…樹脂
109…接合材
110…コンデンサの高電圧側端子
111…コンデンサの低電圧側端子
115…ボンディングワイヤ
116…コンパレータ
117…ゲートドライバ
118…ダイオード
201…n+基板
202…n-エピ層
203…p型チャネル層
204…n+ソース層
205…p+コンタクト層
206…p層
207…n層
208…深いp層
209…フィールドストップ層(チャネルストッパ層)
210…トレンチゲート
211…ゲート酸化膜
212…ポリシリコン電極
213…トレンチ
214…層間絶縁膜
220…ソース電極
221…ドレイン電極
222…ガードリング
230…ツェナーダイオード(ZD)
240…メッキ層
241…半田層
242…保護膜
250…銅ブロック
260…アクティブ領域
261…ゲートパッド
262…ソースセンスパッド
300…内部パッケージ
302…ドレインフレーム
303,304…リードフレーム
305…樹脂
306…接合材
400…3相全波整流回路
401…バッテリ
Claims (10)
- ツェナーダイオード内蔵MOSFETを備える半導体装置において、
MOSFETが動作するアクティブ領域と、
前記アクティブ領域よりも外側に配置され、チップ周辺部の耐圧を保持する周辺領域と、を備え、
前記アクティブ領域は、チップ中心部を含む第1の領域と、前記第1の領域よりも外側に配置される第2の領域と、を有し、
前記第1の領域の耐圧は、前記第2の領域の耐圧及び前記周辺領域の耐圧よりも低いことを特徴とする半導体装置。 - 請求項1に記載の半導体装置において、
前記第1の領域の耐圧は、前記半導体装置にサージが発生し、前記第1の領域の温度が上昇し、前記第2の領域の温度よりも高くなった場合であっても、前記第2の領域の耐圧及び前記周辺領域の耐圧よりも低いことを特徴とする半導体装置。 - 請求項1に記載の半導体装置において、
前記第1の領域及び前記第2の領域には複数の単位セルが配列されており、
前記第1の領域の単位セルの各々にはツェナーダイオードが設けられており、
前記ツェナーダイオードの耐圧は、前記第2の領域の耐圧及び前記周辺領域の耐圧よりも低いことを特徴とする半導体装置。 - 請求項3に記載の半導体装置において、
第1導電型の第1半導体層と、
前記第1半導体層上に形成され、前記第1半導体層より不純物濃度の低い第1導電型の第2半導体層と、
前記第2半導体層上に形成された第2導電型の第3半導体層と、
前記第3半導体層を貫通し、前記第2半導体層に到達するトレンチゲートと、
前記第3半導体層上に形成された第1導電型の第4半導体層と、
前記第4半導体層を貫通し、前記第3半導体層に到達するコンタクトと、を有し、
前記ツェナーダイオードは、前記第2半導体層と前記第3半導体層の接合部の中心部に設けられることを特徴とする半導体装置。 - 請求項4に記載の半導体装置において、
前記第2半導体層と第3半導体層の接合部の中心部近傍の前記第2半導体層内に、第1半導体型の第5半導体層を有し、
前記第2半導体層と第3半導体層の接合部の中心部近傍の前記第3半導体層内に、第2導電型の第6半導体層を有することを特徴とする半導体装置。 - 請求項5に記載の半導体装置において、
前記第5半導体層の不純物濃度は前記第2半導体層の不純物濃度よりも高く、前記第6半導体層の不純物濃度は前記第3半導体層の不純物濃度よりも高いことを特徴とする半導体装置。 - 請求項1に記載の半導体装置において、
前記半導体装置を覆う保護膜を有し、
前記第1の領域は、前記保護膜に設けられた開口部内に配置されることを特徴とする半導体装置。 - 請求項7に記載の半導体装置において、
前記第1の領域は、前記開口部内に設けられた配線用の銅端子の直下にのみ配置されることを特徴とする半導体装置。 - オルタネータに用いられる整流素子において、
上面視で略円形の外周部と前記外周部内に収まる略円形の台座を有する第1の外部電極と、
前記台座上に配置され、樹脂封止された内部パッケージと、
前記内部パッケージを挟んで前記第1の外部電極とは反対側に配置された第2の外部電極と、
を備え、
前記内部パッケージ内に、半導体装置と、
前記半導体装置のドレイン電極とソース電極の電圧または電流が入力され、当該入力された電圧または電流に基づいて、前記半導体装置のゲートを駆動する制御ICチップと、
前記制御ICチップに電源を供給するコンデンサと、
前記ドレイン電極と接続されたドレインフレームと、
前記ソース電極と接続された銅ブロックと、を有し、
前記ドレインフレーム及び前記銅ブロックの表面は前記樹脂に封止されることなく、前記内部パッケージ表面に露出しており、
前記ドレインフレーム及び前記銅ブロックのいずれか一方と前記第1の外部電極とが接合材を用いて電気的に接続され、
前記ドレインフレーム及び前記銅ブロックの他方と前記第2の外部電極とが接合材を用いて電気的に接続されており、
前記半導体装置は、請求項1から8のいずれか1項に記載の半導体装置であることを特徴とする整流素子。 - 請求項9に記載の整流素子を備えることを特徴とするオルタネータ。
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JP2019193215A JP7232743B2 (ja) | 2019-10-24 | 2019-10-24 | 半導体装置及びそれを用いた整流素子、オルタネータ |
PCT/JP2020/037858 WO2021079735A1 (ja) | 2019-10-24 | 2020-10-06 | 半導体装置及びそれを用いた整流素子、オルタネータ |
EP20879597.1A EP4050648A4 (en) | 2019-10-24 | 2020-10-06 | SEMICONDUCTOR DEVICE, RECTIFIER ELEMENT USING SAME, AND ALTERNATOR |
CN202080073752.4A CN114586178A (zh) | 2019-10-24 | 2020-10-06 | 半导体装置以及使用其的整流元件、交流发电机 |
US17/766,613 US20240055423A1 (en) | 2019-10-24 | 2020-10-06 | Semiconductor device, rectifying element using same, and alternator |
TW109135300A TWI771771B (zh) | 2019-10-24 | 2020-10-13 | 半導體裝置及使用其之整流元件及交流發電機 |
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US20240055423A1 (en) | 2024-02-15 |
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WO2021079735A1 (ja) | 2021-04-29 |
TW202118049A (zh) | 2021-05-01 |
EP4050648A4 (en) | 2023-12-27 |
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