JP6723181B2 - 半導体装置および電力変換装置 - Google Patents
半導体装置および電力変換装置 Download PDFInfo
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- 239000004065 semiconductor Substances 0.000 title claims description 35
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- 238000006243 chemical reaction Methods 0.000 claims description 34
- 238000009792 diffusion process Methods 0.000 description 20
- 238000011084 recovery Methods 0.000 description 14
- 230000007423 decrease Effects 0.000 description 13
- 230000000694 effects Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 5
- 230000003071 parasitic effect Effects 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008094 contradictory effect Effects 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
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Description
まず、本発明の前提となる技術について説明する。図6は、前提技術による半導体装置の構成を示す図である。
<構成>
図1は、本発明の実施の形態1による半導体装置の構成の一例を示す図である。
まず、裏面p/nピッチとVF−ERECトレードオフ特性との関係について説明する。
<構成>
図2は、本発明の実施の形態2による半導体装置の構成の一例を示す図である。
図3は、本発明の実施の形態3による半導体装置の構成の一例を示す図である。
図4は、本発明の実施の形態4による半導体装置の構成の一例を示す図である。
本発明による実施の形態5は、上述した実施の形態1〜4による半導体装置を電力変換装置に適用したものである。本発明は特定の電力変換装置に限定されるものではないが、以下、実施の形態5として、三相のインバータに本発明を適用した場合について説明する。
Claims (7)
- n型ドリフト層と、
前記n型ドリフト層の表面に設けられた第1p型アノード層と、
前記第1p型アノード層の表面に選択的に設けられ、ドナー不純物およびアクセプタ不純物を含み、かつ前記第1p型アノード層とアクセプタ不純物濃度が同じである少なくとも1つの第2p型アノード層と、
前記n型ドリフト層の裏面全体に設けられた単一のn型バッファ層と、
前記n型バッファ層の表面に平面視で互いに隣接して設けられたn型カソード層およびp型カソード層と、
を備え、
前記n型カソード層の厚さは、前記p型カソード層の厚さ以上であり、
前記第1p型アノード層の厚さは、前記第2p型アノード層の厚さ以上であり、
前記n型カソード層のドナー不純物濃度は、前記p型カソード層のアクセプタ不純物濃度以上であり、
前記第1p型アノード層のアクセプタ不純物濃度は、前記第2p型アノード層のドナー不純物濃度以上であり、
前記第2p型アノード層のアクセプタ不純物濃度は、前記第2p型アノード層のドナー不純物濃度以上であり、
前記第2p型アノード層のドナー不純物濃度は、前記n型ドリフト層のドナー不純物濃度以上であり、
前記n型カソード層および前記p型カソード層は、繰り返して設けられることを特徴とする、半導体装置。 - 前記第2p型アノード層は、前記n型カソード層に対向する位置に設けられ、
前記第2p型アノード層の幅は、前記n型カソード層よりも小さいことを特徴とする、請求項1に記載の半導体装置。 - 前記第2p型アノード層は、複数設けられていることを特徴とする、請求項2に記載の半導体装置。
- 前記第2p型アノード層は、前記n型カソード層および前記p型カソード層の各々に対向する位置に設けられ、
前記n型カソード層に対向する位置に設けられた前記第2p型アノード層の幅は、前記p型カソード層に対向する位置に設けられた前記第2p型アノード層の幅よりも小さいことを特徴とする、請求項1に記載の半導体装置。 - 前記n型カソード層に対向する位置に設けられた前記第2p型アノード層は、複数設けられていることを特徴とする、請求項4に記載の半導体装置。
- 前記第2p型アノード層は、前記n型カソード層および前記p型カソード層の各々に対向する位置に設けられ、
前記n型カソード層に対向する位置に設けられた前記第2p型アノード層の幅は、前記n型カソード層の幅よりも小さく、
前記p型カソード層に対向する位置に設けられた前記第2p型アノード層の幅は、前記p型カソード層の幅よりも小さいことを特徴とする、請求項1に記載の半導体装置。 - 請求項1から6のいずれか1項に記載の半導体装置を有し、入力される電力を変換して出力する主変換回路と、
前記主変換回路を制御する制御信号を前記主変換回路に出力する制御回路と、
を備える、電力変換装置。
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JP2017046956A JP6723181B2 (ja) | 2017-03-13 | 2017-03-13 | 半導体装置および電力変換装置 |
US15/840,753 US10121908B2 (en) | 2017-03-13 | 2017-12-13 | High withstand voltage diode and power conversion device |
DE102018201229.6A DE102018201229B4 (de) | 2017-03-13 | 2018-01-26 | Halbleitervorrichtungen und Leistungskonvertierungsvorrichtung |
CN201810203934.3A CN108574015B (zh) | 2017-03-13 | 2018-03-13 | 半导体装置及电力变换装置 |
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WO2020201361A1 (en) * | 2019-04-02 | 2020-10-08 | Abb Power Grids Switzerland Ag | Segmented power diode structure with improved reverse recovery |
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US10121908B2 (en) | 2018-11-06 |
DE102018201229A1 (de) | 2018-09-13 |
DE102018201229B4 (de) | 2022-09-15 |
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