JP2011210801A - 電力半導体装置 - Google Patents
電力半導体装置 Download PDFInfo
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 98
- 239000000758 substrate Substances 0.000 claims abstract description 64
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 35
- 229910052710 silicon Inorganic materials 0.000 claims description 35
- 239000010703 silicon Substances 0.000 claims description 35
- 239000012535 impurity Substances 0.000 claims description 12
- 238000005468 ion implantation Methods 0.000 claims description 5
- 238000002513 implantation Methods 0.000 claims description 3
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 claims description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 29
- 239000010408 film Substances 0.000 description 87
- 229910018125 Al-Si Inorganic materials 0.000 description 14
- 229910018520 Al—Si Inorganic materials 0.000 description 14
- 239000010410 layer Substances 0.000 description 11
- 230000036413 temperature sense Effects 0.000 description 10
- 230000015556 catabolic process Effects 0.000 description 8
- 239000011229 interlayer Substances 0.000 description 4
- 230000005684 electric field Effects 0.000 description 3
- 238000000206 photolithography Methods 0.000 description 3
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 3
- 229920005591 polysilicon Polymers 0.000 description 3
- 102000004129 N-Type Calcium Channels Human genes 0.000 description 2
- 108090000699 N-Type Calcium Channels Proteins 0.000 description 2
- 238000005229 chemical vapour deposition Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000001312 dry etching Methods 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000002040 relaxant effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
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Abstract
【解決手段】本発明による電力半導体装置は、半導体基板1に形成したリセス領域に充填された絶縁膜3上にフィールドプレートを設けた終端構造を有し、複数のユニットセル10が並列して接続された電力半導体装置であって、複数のユニットセル10の各々のゲート電極と電気的に接続されたゲート配線が配置されたゲート配線領域12と、ゲート配線領域12と電気的に接続されたゲートパッド領域13とを備え、ゲート配線領域12は、半導体基板1に形成されたリセス領域に充填された絶縁膜3上に配置されることを特徴とする。
【選択図】図1
Description
まず初めに、本発明の前提となる技術について説明する。
図1は、本発明の実施形態1による電力半導体装置のゲート配線領域の構成を示す断面図である。なお、以下、本実施形態による電力半導体装置は、例えば図8に示すような一般的なチップレイアウトにて配置されており、図10に示すような半導体基板に形成したリセス領域(第1のリセス領域)に充填された絶縁膜上にフィールドプレートを設けた終端領域11(終端構造)を有し、複数のトランジスタセル領域10(ユニットセル)が並列して接続されている。そして、ゲート配線領域12には複数のトランジスタセル領域10の各々のゲート電極と電気的に接続されたゲート配線が配置され、ゲートパッド13(ゲートパッド領域)はゲート配線領域12と電気的に接続されている。
図2は、本発明の実施形態2による電力半導体装置のゲート配線領域の構成を示す断面図である。本発明の実施形態2では、図2に示すように、n型シリコン半導体基板1に形成されたリセス領域(第2のリセス領域)下に、注入量が略1.0E12atoms/cm2のイオン注入で形成された低不純物濃度のp型ウェル領域9(第2の不純物領域)が設けられていることを特徴としている。その他の構成は、実施形態1と同様であるため、ここでは説明を省略する。
本発明の実施形態3では、Al−Si電極6(ゲートパッド領域)が、n型シリコン半導体基板1(半導体基板)に形成されたリセス領域(第3のリセス領域)に充填された絶縁膜3上に配置されることを特徴としている。
図5は、温度センスダイオードを備えた一般的なIGBTのチップレイアウトの一例を示す平面図であり、図8に示す一般的なIGBTのチップレイアウトに温度センスダイオード領域14および温度センスダイオードパッド15を備えている。また、図6は、本発明の実施形態4による電力半導体装置の温度センスダイオード領域14の構成を示す断面図である。
本発明の実施形態5では、本実施形態1〜4におけるシリコン半導体基板に代えて、炭化シリコン(SiC)基板、窒化ガリウム(GaN)基板など、シリコン半導体基板以外の半導体基板を用いることを特徴としている。
Claims (6)
- 半導体基板に形成した第1のリセス領域に充填された絶縁膜上にフィールドプレートを設けた終端構造を有し、複数のユニットセルが並列して接続された電力半導体装置であって、
前記複数のユニットセルの各々のゲート電極と電気的に接続されたゲート配線が配置されたゲート配線領域と、
前記ゲート配線領域と電気的に接続されたゲートパッド領域と、
を備え、
前記ゲート配線領域は、前記半導体基板に形成された第2のリセス領域に充填された前記絶縁膜上に配置されることを特徴とする、電力半導体装置。 - 前記第1のリセス領域下に第1の不純物領域を、前記第2のリセス領域下に第2の不純物領域を各々設け、
前記第1の不純物領域および前記第2の不純物領域の各々は、前記ユニットセルのP型活性領域よりも低不純物濃度のP型領域であることを特徴とする、請求項1に記載の電力半導体装置。 - 前記第1の不純物領域および前記第2の不純物領域の各々は、注入量が略1.0E12atoms/cm2のイオン注入で形成されることを特徴とする、請求項2に記載の電力半導体装置。
- 前記ゲートパッド領域は、前記半導体基板に形成された第3のリセス領域に充填された前記絶縁膜上に配置されることを特徴とする、請求項1に記載の電力半導体装置。
- 温度センスダイオードが配置された温度センスダイオード領域と、当該温度センスダイオード領域と電気的に接続された温度センスダイオードパッドとをさらに備え、
前記温度センスダイオード領域は、前記半導体基板に形成された第4のリセス領域に充填された前記絶縁膜上に配置され、
前記温度センスダイオードパッドは、前記半導体基板に形成された第5のリセス領域に充填された前記絶縁膜上に配置されることを特徴とする、請求項1に記載の電力半導体装置。 - 前記半導体基板は、シリコン(Si)基板、炭化シリコン(SiC)基板、窒化ガリウム(GaN)基板のいずれかであることを特徴とする、請求項1に記載の電力半導体装置。
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JPWO2016039069A1 (ja) * | 2014-09-11 | 2017-04-27 | 富士電機株式会社 | 半導体装置およびその製造方法 |
JP2020107702A (ja) * | 2018-12-27 | 2020-07-09 | 富士電機株式会社 | 半導体装置および半導体装置の製造方法 |
JPWO2019208755A1 (ja) * | 2018-04-27 | 2020-12-10 | 三菱電機株式会社 | 半導体装置および電力変換装置 |
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KR101602411B1 (ko) | 2014-07-29 | 2016-03-11 | 메이플세미컨덕터(주) | 게이트 패드 영역에 액티브셀 배치 구조를 가지는 전력 반도체 장치 |
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US8552428B2 (en) | 2013-10-08 |
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