KR100965968B1 - Mosfet 및 mosfet의 제조 방법 - Google Patents
Mosfet 및 mosfet의 제조 방법 Download PDFInfo
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- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/68—Types of semiconductor device ; Multistep manufacturing processes therefor controllable by only the electric current supplied, or only the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched
- H01L29/76—Unipolar devices, e.g. field effect transistors
- H01L29/772—Field effect transistors
- H01L29/78—Field effect transistors with field effect produced by an insulated gate
- H01L29/7801—DMOS transistors, i.e. MISFETs with a channel accommodating body or base region adjoining a drain drift region
- H01L29/7802—Vertical DMOS transistors, i.e. VDMOS transistors
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- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
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- H01L21/0445—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising crystalline silicon carbide
- H01L21/0455—Making n or p doped regions or layers, e.g. using diffusion
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- H01L29/02—Semiconductor bodies ; Multistep manufacturing processes therefor
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Abstract
Description
Claims (14)
- 기판의 주면(主面) 상에 형성되어 있고, 제 1 도전형을 갖고 있으며, 탄화규소로 이루어지는 드리프트층(drift layer)과,상기 드리프트층의 표면 내에 형성되어 있고, 제 2 도전형을 갖는 베이스 영역과,상기 베이스 영역의 표면 내에 형성되어 있고, 제 1 도전형을 갖는 소스 영역을 구비하고 있으며,상기 드리프트층은,표면으로부터 제 1 소정의 깊이까지의 영역인 제 1 영역과,상기 제 1 소정의 깊이보다 깊은 영역에 형성되어 있는 제 2 영역을 구비하고 있고,상기 제 1 영역의 불순물 농도는 상기 제 2 영역의 불순물 농도보다 낮으며,상기 베이스 영역은,표면으로부터 제 2 소정의 깊이까지의 영역인 제 3 영역과,상기 제 2 소정의 깊이보다 깊은 영역에 형성되어 있는 제 4 영역을 구비하고 있으며,상기 제 3 영역의 불순물 농도는 상기 제 4 영역의 불순물 농도보다 낮은 것을 특징으로 하는 MOSFET.
- 제 1 항에 있어서,상기 제 1 영역의 불순물 농도는 5×1012/㎤ 이상, 5×1016/㎤ 이하인 것을 특징으로 하는 MOSFET.
- 제 1 항에 있어서,상기 제 2 영역의 불순물 농도는 1×1015/㎤ 이상, 1×1017/㎤ 이하인 것을 특징으로 하는 MOSFET.
- 제 1 항에 있어서,상기 제 1 영역의 두께는 1㎛ 이하인 것을 특징으로 하는 MOSFET.
- 삭제
- 제 1 항에 있어서,상기 드리프트층의 상기 제 1 영역의 깊이는 상기 베이스 영역의 상기 제 3 영역의 깊이보다 깊은 것을 특징으로 하는 MOSFET.
- 제 1 항에 있어서,상기 제 3 영역의 불순물 농도는 5×1013/㎤ 이상, 1×1017/㎤ 이하인 것을 특징으로 하는 MOSFET.
- 제 1 항에 있어서,상기 제 4 영역의 불순물 농도는 1×1017/㎤ 이상인 것을 특징으로 하는 MOSFET.
- 제 1 항에 있어서,상기 제 3 영역의 두께는 0.2㎛ 이하인 것을 특징으로 하는 MOSFET.
- 제 1 항에 있어서,상기 제 3 영역의 두께는, 상기 베이스 영역과 상기 드리프트층의 pn 접합으로부터 신장하는 공핍층에 의해, 상기 베이스 영역이 펀치 스루를 일으키지 않는 두께인 것을 특징으로 하는 MOSFET.
- 제 1 항에 있어서,상기 드리프트층의 표면의 면 방위는 (11-20)면인 것을 특징으로 하는 MOSFET.
- 제 1 항에 있어서,상기 드리프트층의 표면의 면 방위는 면 방위가 (000-1)면인 것을 특징으로 하는 MOSFET.
- (A) 반도체 기판 상에, 제 1 도전형이고, 비교적 불순물 농도가 높은 드리프트층을 성장시키는 공정과,(B) 상기 비교적 불순물 농도가 높은 드리프트층에 대하여, 제 2 도전형인 불순물 이온을 비교적 고농도로 주입하여, 비교적 불순물 농도가 높은 베이스 영역을 형성하는 공정과,(C) 상기 비교적 불순물 농도가 높은 드리프트층 상에, 제 1 도전형이고, 비교적 불순물 농도가 낮은 드리프트층을 성장시키는 공정과,(D) 상기 비교적 불순물 농도가 낮은 드리프트층에 대하여, 제 2 도전형인 불순물 이온을 비교적 저농도로 주입하여, 비교적 불순물 농도가 낮은 베이스 영역을 형성하는 공정을 구비하고 있으며,상기 공정 (A)과 상기 공정 (C)는 각각의 반응로 내에서 행하여지는 것을 특징으로 하는 MOSFET의 제조 방법.
- 제 13 항에 있어서,상기 공정 (B) 및 상기 공정 (D) 각각에서의 이온 주입량은 각각 일정한 것을 특징으로 하는 MOSFET의 제조 방법.
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JPJP-P-2005-00303949 | 2005-10-19 | ||
JP2005303949 | 2005-10-19 |
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KR20080047477A KR20080047477A (ko) | 2008-05-28 |
KR100965968B1 true KR100965968B1 (ko) | 2010-06-24 |
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US (1) | US7928469B2 (ko) |
JP (1) | JP5082853B2 (ko) |
KR (1) | KR100965968B1 (ko) |
CN (1) | CN100593243C (ko) |
DE (1) | DE112006002876B4 (ko) |
WO (1) | WO2007046254A1 (ko) |
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US8222649B2 (en) * | 2006-02-07 | 2012-07-17 | Mitsubishi Electric Corporation | Semiconductor device and method of manufacturing the same |
US8536582B2 (en) * | 2008-12-01 | 2013-09-17 | Cree, Inc. | Stable power devices on low-angle off-cut silicon carbide crystals |
JPWO2010110246A1 (ja) | 2009-03-25 | 2012-09-27 | ローム株式会社 | 半導体装置 |
JP5721351B2 (ja) | 2009-07-21 | 2015-05-20 | ローム株式会社 | 半導体装置 |
JP5736683B2 (ja) * | 2010-07-30 | 2015-06-17 | 三菱電機株式会社 | 電力用半導体素子 |
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US20090173997A1 (en) | 2009-07-09 |
CN101310388A (zh) | 2008-11-19 |
DE112006002876T5 (de) | 2008-10-02 |
DE112006002876B4 (de) | 2014-07-24 |
JP5082853B2 (ja) | 2012-11-28 |
US7928469B2 (en) | 2011-04-19 |
WO2007046254A1 (ja) | 2007-04-26 |
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JPWO2007046254A1 (ja) | 2009-04-23 |
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