JP2015070193A - 半導体装置 - Google Patents
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 83
- 239000000758 substrate Substances 0.000 claims abstract description 51
- 210000000746 body region Anatomy 0.000 claims description 34
- 229910021332 silicide Inorganic materials 0.000 claims description 16
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 claims description 16
- 239000010410 layer Substances 0.000 description 131
- 238000005468 ion implantation Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 9
- 239000011229 interlayer Substances 0.000 description 8
- 229920002120 photoresistant polymer Polymers 0.000 description 7
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 7
- 238000001312 dry etching Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 229910010271 silicon carbide Inorganic materials 0.000 description 5
- 230000015556 catabolic process Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 1
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- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
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- 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
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- H01L29/1095—Body region, i.e. base region, of DMOS transistors or IGBTs
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- H01L29/41725—Source or drain electrodes for field effect devices
- H01L29/41741—Source or drain electrodes for field effect devices for vertical or pseudo-vertical devices
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- H01L29/40—Electrodes ; Multistep manufacturing processes therefor
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- H01L29/41725—Source or drain electrodes for field effect devices
- H01L29/41766—Source or drain electrodes for field effect devices with at least part of the source or drain electrode having contact below the semiconductor surface, e.g. the source or drain electrode formed at least partially in a groove or with inclusions of conductor inside the semiconductor
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- 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
- H01L29/7813—Vertical DMOS transistors, i.e. VDMOS transistors with trench gate electrode, e.g. UMOS transistors
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- H01L29/02—Semiconductor bodies ; Multistep manufacturing processes therefor
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- H01L29/0684—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions characterised by the shape, relative sizes or dispositions of the semiconductor regions or junctions between the regions
- H01L29/0692—Surface layout
- H01L29/0696—Surface layout of cellular field-effect devices, e.g. multicellular DMOS transistors or IGBTs
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- H01L29/02—Semiconductor bodies ; Multistep manufacturing processes therefor
- H01L29/12—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by the materials of which they are formed
- H01L29/16—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by the materials of which they are formed including, apart from doping materials or other impurities, only elements of Group IV of the Periodic Table
- H01L29/1608—Silicon carbide
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- H01L29/40—Electrodes ; Multistep manufacturing processes therefor
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- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/66007—Multistep manufacturing processes
- H01L29/66053—Multistep manufacturing processes of devices having a semiconductor body comprising crystalline silicon carbide
- H01L29/66068—Multistep manufacturing processes of devices having a semiconductor body comprising crystalline silicon carbide the devices being controllable only by the electric current supplied or the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched, e.g. three-terminal devices
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- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/66007—Multistep manufacturing processes
- H01L29/66075—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials
- H01L29/66227—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials the devices being controllable only by the electric current supplied or the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched, e.g. three-terminal devices
- H01L29/66409—Unipolar field-effect transistors
- H01L29/66477—Unipolar field-effect transistors with an insulated gate, i.e. MISFET
- H01L29/66674—DMOS transistors, i.e. MISFETs with a channel accommodating body or base region adjoining a drain drift region
- H01L29/66712—Vertical DMOS transistors, i.e. VDMOS transistors
- H01L29/66727—Vertical DMOS transistors, i.e. VDMOS transistors with a step of recessing the source electrode
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- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Ceramic Engineering (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Electrodes Of Semiconductors (AREA)
Abstract
【解決手段】左側のp層312は、半導体基板20の表面に形成された溝25の内面に形成されている。p層311、312のどちらの表面においても、ソース領域となるn+層32が形成されている。右側のp層311において形成されたn+層32を貫通してp+層33が形成されている。これにより、ゲート電極40の右側のn+層32、p+層33と、ゲート電極40の左側の溝25内のn+層32は、共通のソース電極(主電極)50に接続される。
【選択図】図1
Description
本発明の半導体装置は、半導体基板の表面側において第1の導電型をもつソース領域が前記第1の導電型と逆の第2の導電型をもつボディ領域の中に形成され、前記ソース領域及び前記ボディ領域と接続された主電極と、前記主電極を介して流れる電流を制御する電圧が印加されるゲート電極と、を前記半導体基板の表面側に具備する半導体装置であって、前記半導体基板の表面には溝が形成され、前記溝の内側面に前記ソース領域が露出し、前記主電極は、前記溝の内側面における前記ソース領域と接続されたことを特徴とする。
本発明の半導体装置は、前記ボディ領域と前記ソース領域とが、前記溝の内面において順次形成されたことを特徴とする。
本発明の半導体装置は、前記ボディ領域と前記ソース電極とが接続されるボディ領域接続領域が前記溝の底面よりも高い位置に設けられたことを特徴とする。
本発明の半導体装置は、前記半導体基板の表面において前記ゲート電極が一方向に延伸して形成され、前記溝及び前記ボディ領域接続領域は、前記ゲート電極と平行な方向において、交互に設けられたことを特徴とする。
本発明の半導体装置は、前記半導体基板の表面において前記ゲート電極が一方向に延伸して形成され、前記ソース領域及び前記ボディ領域は、前記ゲート電極からみた前記一方向と垂直な両側において前記半導体基板の表面に形成され、前記ゲート電極からみた前記一方向の一方の側において前記溝が形成され、前記主電極は前記溝の中に形成された前記ソース領域と接続されたことを特徴とする。
本発明の半導体装置は、前記ボディ領域と前記ソース電極とが接続されるボディ領域接続領域が前記溝の底面に設けられたことを特徴とする。
本発明の半導体装置において、前記主電極と前記ソース領域及び/又は前記ボディ領域とは、シリサイド電極を介して接続されたことを特徴とする。
20 半導体基板
21 n+基板
22 n層
25 溝
31、311、312 p層(ボディ領域)
32 n+層(ソース領域)
33 p+層
40 ゲート電極
41 ゲート酸化膜
42 シリサイド電極
43 層間絶縁層
50 ソース電極(主電極)
51 ドレイン電極
Claims (7)
- 半導体基板の表面側において第1の導電型をもつソース領域が前記第1の導電型と逆の第2の導電型をもつボディ領域の中に形成され、前記ソース領域及び前記ボディ領域と接続された主電極と、前記主電極を介して流れる電流を制御する電圧が印加されるゲート電極と、を前記半導体基板の表面側に具備する半導体装置であって、
前記半導体基板の表面には溝が形成され、
前記溝の内側面に前記ソース領域が露出し、前記主電極は、前記溝の内側面における前記ソース領域と接続されたことを特徴とする半導体装置。 - 前記ボディ領域と前記ソース領域とが、前記溝の内面において順次形成されたことを特徴とする請求項1に記載の半導体装置。
- 前記ボディ領域と前記ソース電極とが接続されるボディ領域接続領域が前記溝の底面よりも高い位置に設けられたことを特徴とする請求項2に記載の半導体装置。
- 前記半導体基板の表面において前記ゲート電極が一方向に延伸して形成され、
前記溝及び前記ボディ領域接続領域は、前記ゲート電極と平行な方向において、交互に設けられたことを特徴とする請求項3に記載の半導体装置。 - 前記半導体基板の表面において前記ゲート電極が一方向に延伸して形成され、
前記ソース領域及び前記ボディ領域は、前記ゲート電極からみた前記一方向と垂直な両側において前記半導体基板の表面に形成され、
前記ゲート電極からみた前記一方向の一方の側において前記溝が形成され、前記主電極は前記溝の中に形成された前記ソース領域と接続されたことを特徴とする請求項3に記載の半導体装置。 - 前記ボディ領域と前記ソース電極とが接続されるボディ領域接続領域が前記溝の底面に設けられたことを特徴とする請求項2に記載の半導体装置。
- 前記主電極と前記ソース領域及び/又は前記ボディ領域とは、シリサイド電極を介して接続されたことを特徴とする請求項1から請求項6までのいずれか1項に記載の半導体装置。
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JP2013204889A JP5971218B2 (ja) | 2013-09-30 | 2013-09-30 | 半導体装置 |
US14/496,808 US9178055B2 (en) | 2013-09-30 | 2014-09-25 | Semiconductor device |
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JP2013204889A JP5971218B2 (ja) | 2013-09-30 | 2013-09-30 | 半導体装置 |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10249717B2 (en) | 2017-01-30 | 2019-04-02 | Kabushiki Kaisha Toshiba | Semiconductor device and method for manufacturing the same |
DE112019006364T5 (de) | 2018-12-21 | 2021-09-02 | Rohm Co., Ltd. | Halbleiterbauelement |
US11764758B2 (en) | 2019-06-06 | 2023-09-19 | Rohm Co., Ltd. | Semiconductor device |
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Publication number | Priority date | Publication date | Assignee | Title |
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JP6526591B2 (ja) | 2016-03-16 | 2019-06-05 | 株式会社東芝 | 半導体装置 |
JP6782213B2 (ja) * | 2017-09-19 | 2020-11-11 | 株式会社東芝 | 半導体装置 |
JP2022015728A (ja) * | 2020-07-09 | 2022-01-21 | 株式会社東芝 | 半導体装置、インバータ回路、駆動装置、車両、及び、昇降機 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04322471A (ja) * | 1991-04-23 | 1992-11-12 | Mitsubishi Electric Corp | Mos型半導体装置およびその製造方法 |
JP2010238738A (ja) * | 2009-03-30 | 2010-10-21 | Toshiba Corp | 半導体装置および半導体装置の製造方法 |
US20110073906A1 (en) * | 2009-09-30 | 2011-03-31 | Alpha & Omega Semiconductor, Ltd. | High voltage MOSFET diode reverse recovery by minimizing P-body charges |
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KR101442886B1 (ko) | 2008-04-15 | 2014-09-19 | 스미토모덴키고교가부시키가이샤 | 반도체 장치 및 그 제조 방법 |
US8193579B2 (en) * | 2008-07-29 | 2012-06-05 | Rohm Co., Ltd. | Trench type semiconductor device and fabrication method for the same |
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2013
- 2013-09-30 JP JP2013204889A patent/JP5971218B2/ja not_active Expired - Fee Related
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- 2014-09-25 US US14/496,808 patent/US9178055B2/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04322471A (ja) * | 1991-04-23 | 1992-11-12 | Mitsubishi Electric Corp | Mos型半導体装置およびその製造方法 |
JP2010238738A (ja) * | 2009-03-30 | 2010-10-21 | Toshiba Corp | 半導体装置および半導体装置の製造方法 |
US20110073906A1 (en) * | 2009-09-30 | 2011-03-31 | Alpha & Omega Semiconductor, Ltd. | High voltage MOSFET diode reverse recovery by minimizing P-body charges |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10249717B2 (en) | 2017-01-30 | 2019-04-02 | Kabushiki Kaisha Toshiba | Semiconductor device and method for manufacturing the same |
DE112019006364T5 (de) | 2018-12-21 | 2021-09-02 | Rohm Co., Ltd. | Halbleiterbauelement |
US11764758B2 (en) | 2019-06-06 | 2023-09-19 | Rohm Co., Ltd. | Semiconductor device |
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JP5971218B2 (ja) | 2016-08-17 |
US9178055B2 (en) | 2015-11-03 |
US20150091082A1 (en) | 2015-04-02 |
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