JP2006295134A - 半導体装置およびその製造方法 - Google Patents
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 70
- 238000004519 manufacturing process Methods 0.000 title claims description 25
- 238000000034 method Methods 0.000 title claims description 8
- 239000012535 impurity Substances 0.000 claims abstract description 120
- 239000000758 substrate Substances 0.000 claims abstract description 30
- 238000000926 separation method Methods 0.000 claims description 26
- 238000010438 heat treatment Methods 0.000 claims description 10
- 238000002955 isolation Methods 0.000 claims description 8
- 238000009792 diffusion process Methods 0.000 claims description 7
- 238000005468 ion implantation Methods 0.000 claims description 6
- 230000015556 catabolic process Effects 0.000 abstract description 17
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 108091006146 Channels Proteins 0.000 description 81
- 239000010410 layer Substances 0.000 description 63
- 239000011229 interlayer Substances 0.000 description 13
- 229920002120 photoresistant polymer Polymers 0.000 description 7
- TVZRAEYQIKYCPH-UHFFFAOYSA-N 3-(trimethylsilyl)propane-1-sulfonic acid Chemical compound C[Si](C)(C)CCCS(O)(=O)=O TVZRAEYQIKYCPH-UHFFFAOYSA-N 0.000 description 6
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 6
- 229910052698 phosphorus Inorganic materials 0.000 description 6
- 239000011574 phosphorus Substances 0.000 description 6
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 230000001133 acceleration Effects 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 229910052796 boron Inorganic materials 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- 238000002513 implantation Methods 0.000 description 3
- 238000010030 laminating Methods 0.000 description 3
- 108010075750 P-Type Calcium Channels Proteins 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000000059 patterning Methods 0.000 description 2
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 2
- 229920005591 polysilicon Polymers 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001312 dry etching Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 239000005368 silicate glass Substances 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- 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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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- 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
- H01L29/02—Semiconductor bodies ; Multistep manufacturing processes therefor
- H01L29/06—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
- H01L29/08—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 with semiconductor regions connected to an electrode carrying current to be rectified, amplified or switched and such electrode being part of a semiconductor device which comprises three or more electrodes
- H01L29/0843—Source or drain regions of field-effect devices
- H01L29/0847—Source or drain regions of field-effect devices of field-effect transistors with insulated gate
- H01L29/0852—Source or drain regions of field-effect devices of field-effect transistors with insulated gate of DMOS transistors
- H01L29/0873—Drain regions
- H01L29/0878—Impurity concentration or distribution
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- 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
- H01L29/40—Electrodes ; Multistep manufacturing processes therefor
- H01L29/41—Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions
- H01L29/423—Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions not carrying the current to be rectified, amplified or switched
- H01L29/42312—Gate electrodes for field effect devices
- H01L29/42316—Gate electrodes for field effect devices for field-effect transistors
- H01L29/4232—Gate electrodes for field effect devices for field-effect transistors with insulated gate
- H01L29/42372—Gate electrodes for field effect devices for field-effect transistors with insulated gate characterised by the conducting layer, e.g. the length, the sectional shape or the lay-out
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- 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
- H01L29/40—Electrodes ; Multistep manufacturing processes therefor
- H01L29/41—Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions
- H01L29/423—Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions not carrying the current to be rectified, amplified or switched
- H01L29/42312—Gate electrodes for field effect devices
- H01L29/42316—Gate electrodes for field effect devices for field-effect transistors
- H01L29/4232—Gate electrodes for field effect devices for field-effect transistors with insulated gate
- H01L29/42372—Gate electrodes for field effect devices for field-effect transistors with insulated gate characterised by the conducting layer, e.g. the length, the sectional shape or the lay-out
- H01L29/4238—Gate electrodes for field effect devices for field-effect transistors with insulated gate characterised by the conducting layer, e.g. the length, the sectional shape or the lay-out characterised by the surface lay-out
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- 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
- H01L29/66007—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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- 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
- H01L29/70—Bipolar devices
- H01L29/72—Transistor-type devices, i.e. able to continuously respond to applied control signals
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- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Insulated Gate Type Field-Effect Transistor (AREA)
Abstract
【解決手段】ゲート電極の下方にn型不純物領域を設ける。ゲート長をチャネル領域の深さ以下にすることで、n型不純物領域の側面と隣り合うチャネル領域の側面が略垂直な接合面を形成する。これにより、空乏層が基板深さ方向に均一に広がるため、所定の耐圧を確保できる。またゲート電極を挟むチャネル領域の間隔が表面及び底部で均一となるため、n型不純物領域の不純物濃度を高めることができ、低オン抵抗化が図れる。
【選択図】 図1
Description
2 n−型エピタキシャル層(ドレイン領域)
4 チャネル領域
11 ゲート酸化膜
13 ゲート電極
14 n型不純物領域
15 ソース領域
16 層間絶縁膜
18 ソース電極
21 n+半導体基板
22 n−型エピタキシャル層(ドレイン領域)
24 チャネル領域
31 ゲート酸化膜
33 ゲート電極
35 ソース領域
36 層間絶縁膜
38 ソース電極
40 n型不純物層
45 π部
50 空乏層
Claims (16)
- 一導電型半導体基板と、
前記基板上に一導電型半導体層を積層したドレイン領域と、
前記半導体層表面に複数設けられた逆導電型のチャネル領域と、
隣り合う前記チャネル領域間に設けられ、該チャネル領域の側面と略垂直な接合面を有する一導電型不純物領域と、
前記一導電型不純物領域上方の前記半導体層表面に設けられたゲート電極と、
前記ゲート電極を被覆する絶縁膜と、
前記チャネル領域表面に設けられた一導電型のソース領域と、
を具備することを特徴とする半導体装置。 - 前記一導電型不純物領域の底部と前記チャネル領域の底部はほぼ同一深さに位置することを特徴とする請求項1に記載の半導体装置。
- 1つの前記絶縁膜に被覆される前記ゲート電極は少なくとも一部が所定の分離幅で複数に分離され、分離されたゲート電極はそれぞれ同一のゲート幅を有することを特徴とする請求項1に記載の半導体装置。
- 前記ゲート幅は前記チャネル領域の深さ以下であることを特徴とする請求項3に記載の半導体装置。
- 前記分離幅と前記チャネル領域深さの比は、0.15以下:1であることを特徴とする請求項3に記載の半導体装置。
- オフ状態でドレイン−ソース電圧を印加時に、前記チャネル領域から前記一導電型不純物領域に広がる空乏層がピンチオフすることを特徴とする請求項1に記載の半導体装置。
- 一導電型半導体基板上に一導電型半導体層を積層してドレイン領域を形成し、第1絶縁膜を形成する工程と、
前記第1絶縁膜上にゲート電極を形成する工程と、
前記ゲート電極の外側に複数の逆導電型のチャネル領域を形成する工程と、
前記チャネル領域の側面と略垂直な接合面を有する一導電型不純物領域を形成する工程と、
前記チャネル領域表面に一導電型のソース領域を形成する工程と、
前記一導電型不純物領域の上方の前記ゲート電極を被覆する第2絶縁膜を形成する工程と、を具備することを特徴とする半導体装置の製造方法。 - 一導電型半導体基板上に一導電型半導体層を積層してドレイン領域を形成し、全面に第1絶縁膜を形成する工程と、
前記第1絶縁膜上に少なくとも一部が所定の分離幅で分離された複数のゲート電極を形成する工程と、
前記複数のゲート電極間の前記半導体層表面に一導電型の不純物を注入する工程と、
前記複数のゲート電極の外側の前記半導体層表面に逆導電型の不純物を注入する工程と、
熱処理を行い、複数のチャネル領域と、該チャネル領域の側面と略垂直な接合面を有する一導電型不純物領域とを形成する工程と、
前記チャネル領域表面に一導電型のソース領域を形成する工程と、
前記複数のゲート電極を一体で被覆する第2絶縁膜を形成する工程と、
を具備することを特徴とする半導体装置の製造方法。 - 前記ゲート電極のゲート幅は、前記チャネル領域の深さ以下であることを特徴とする請求項8に記載の半導体装置の製造方法。
- 前記一導電型不純物領域と前記チャネル領域は、同等の不純物濃度であることを特徴とする請求項7または請求項8に記載の半導体装置の製造方法。
- 前記一導電型不純物領域の不純物濃度は、1×1017cm−3程度であることを特徴とする請求項10に記載の半導体装置の製造方法。
- 前記分離幅と前記チャネル領域深さの比は、0.15以下:1であることを特徴とする請求項8に記載の半導体装置の製造方法。
- 前記一導電型不純物領域の底部と前記チャネル領域の底部はほぼ同一深さに形成されることを特徴とする請求項7または請求項8に記載の半導体装置の製造方法。
- 前記ソース領域は、イオン注入および拡散により形成することを特徴とする請求項8に記載の半導体装置の製造方法。
- 前記ゲート電極形成後に前記一導電型不純物領域を形成する不純物のイオン注入を行うことを特徴とする請求項7または請求項8に記載の半導体装置の製造方法。
- 前記一導電不純物領域は、オフ状態でドレイン−ソース電圧を印加時に前記チャネル領域から広がる空乏層がピンチオフする幅に形成されることを特徴とする請求項7または請求項8に記載の半導体装置の製造方法。
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JP2006048729A JP2006295134A (ja) | 2005-03-17 | 2006-02-24 | 半導体装置およびその製造方法 |
KR1020060022611A KR100743339B1 (ko) | 2005-03-17 | 2006-03-10 | 반도체 장치 및 그 제조 방법 |
US11/373,488 US20060220122A1 (en) | 2005-03-17 | 2006-03-13 | Semiconductor device and method of manufacturing the same |
US12/567,050 US8133788B2 (en) | 2005-03-17 | 2009-09-25 | Method of manufacturing semiconductor device |
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JP2006048729A JP2006295134A (ja) | 2005-03-17 | 2006-02-24 | 半導体装置およびその製造方法 |
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US8053159B2 (en) | 2003-11-18 | 2011-11-08 | Honeywell International Inc. | Antireflective coatings for via fill and photolithography applications and methods of preparation thereof |
JP2006295134A (ja) * | 2005-03-17 | 2006-10-26 | Sanyo Electric Co Ltd | 半導体装置およびその製造方法 |
JP5025935B2 (ja) * | 2005-09-29 | 2012-09-12 | オンセミコンダクター・トレーディング・リミテッド | 絶縁ゲート型電界効果トランジスタの製造方法 |
JP2009088005A (ja) * | 2007-09-27 | 2009-04-23 | Sanyo Electric Co Ltd | 半導体装置およびその製造方法 |
JP5433352B2 (ja) * | 2009-09-09 | 2014-03-05 | 株式会社東芝 | 半導体装置の製造方法 |
US9070768B2 (en) * | 2010-02-15 | 2015-06-30 | X-Fab Semiconductor Foundries Ag | DMOS transistor having an increased breakdown voltage and method for production |
CN107170682A (zh) * | 2016-03-07 | 2017-09-15 | 北大方正集团有限公司 | Vdmos器件的制作方法 |
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JP5025935B2 (ja) * | 2005-09-29 | 2012-09-12 | オンセミコンダクター・トレーディング・リミテッド | 絶縁ゲート型電界効果トランジスタの製造方法 |
JP5014622B2 (ja) | 2005-12-08 | 2012-08-29 | オンセミコンダクター・トレーディング・リミテッド | 絶縁ゲート型半導体装置の製造方法 |
JP2009088005A (ja) * | 2007-09-27 | 2009-04-23 | Sanyo Electric Co Ltd | 半導体装置およびその製造方法 |
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2006
- 2006-02-24 JP JP2006048729A patent/JP2006295134A/ja active Pending
- 2006-03-10 KR KR1020060022611A patent/KR100743339B1/ko not_active IP Right Cessation
- 2006-03-13 US US11/373,488 patent/US20060220122A1/en not_active Abandoned
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2009
- 2009-09-25 US US12/567,050 patent/US8133788B2/en active Active
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JPH09102506A (ja) * | 1995-10-05 | 1997-04-15 | Hitachi Ltd | 半導体装置の製造方法 |
JP2003298052A (ja) * | 2002-03-29 | 2003-10-17 | Toshiba Corp | 半導体装置 |
WO2004036655A1 (ja) * | 2002-10-18 | 2004-04-29 | National Institute Of Advanced Industrial Science And Technology | 炭化ケイ素半導体装置及びその製造方法 |
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KR20060101262A (ko) | 2006-09-22 |
US8133788B2 (en) | 2012-03-13 |
US20060220122A1 (en) | 2006-10-05 |
KR100743339B1 (ko) | 2007-07-26 |
US20100015772A1 (en) | 2010-01-21 |
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