JP5525736B2 - 半導体装置及びその製造方法 - Google Patents
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- 239000004065 semiconductor Substances 0.000 title claims description 40
- 238000004519 manufacturing process Methods 0.000 title claims description 13
- 238000009792 diffusion process Methods 0.000 claims description 158
- 125000006850 spacer group Chemical group 0.000 claims description 18
- 239000000758 substrate Substances 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 6
- 230000003071 parasitic effect Effects 0.000 description 38
- 230000015556 catabolic process Effects 0.000 description 27
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 10
- 239000012535 impurity Substances 0.000 description 10
- 229910052814 silicon oxide Inorganic materials 0.000 description 10
- 229920002120 photoresistant polymer Polymers 0.000 description 7
- 230000017525 heat dissipation Effects 0.000 description 6
- 238000002955 isolation Methods 0.000 description 5
- 238000005468 ion implantation Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 229910052796 boron Inorganic materials 0.000 description 2
- 230000009194 climbing Effects 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
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- 230000005684 electric field Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 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
- 230000007423 decrease Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
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- 239000005360 phosphosilicate glass Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
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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
- H01L29/7816—Lateral DMOS transistors, i.e. LDMOS transistors
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- H01L29/0843—Source or drain regions of field-effect devices
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- 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
- H01L29/66681—Lateral DMOS transistors, i.e. LDMOS transistors
- H01L29/66689—Lateral DMOS transistors, i.e. LDMOS transistors with a step of forming an insulating sidewall spacer
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- 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
- H01L29/7816—Lateral DMOS transistors, i.e. LDMOS transistors
- H01L29/7817—Lateral DMOS transistors, i.e. LDMOS transistors structurally associated with at least one other device
- H01L29/7821—Lateral DMOS transistors, i.e. LDMOS transistors structurally associated with at least one other device the other device being a breakdown diode, e.g. Zener diode
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- H01L29/0692—Surface layout
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- H01L29/02—Semiconductor bodies ; Multistep manufacturing processes therefor
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- 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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- Ceramic Engineering (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Manufacturing & Machinery (AREA)
- Insulated Gate Type Field-Effect Transistor (AREA)
- Semiconductor Integrated Circuits (AREA)
Description
2 P型の単結晶シリコン基板
3 エピタキシャル層
10 N型の拡散層
14 P型の拡散層
15 PN接合領域
Claims (4)
- 一導電型の半導体層と、
前記半導体層に形成された一導電型のドレイン拡散層と、
前記半導体層に形成された逆導電型のバックゲート拡散層と、
前記バックゲート拡散層に重畳して形成された一導電型のソース拡散層とを有し、
前記ドレイン拡散層は、低濃度の第1の拡散層に高濃度の第2の拡散層が重畳して形成され、
前記低濃度の第1の拡散層には、前記高濃度の第2の拡散層とPN接合領域を形成する逆導電型の拡散層が重畳して形成され、
前記ドレイン拡散層へのコンタクト領域は前記高濃度の第2の拡散層上に形成され、
前記逆導電型の拡散層は前記コンタクト領域よりも前記バックゲート拡散層側へ配置され、前記逆導電型の拡散層はフローティング拡散層であることを特徴とする半導体装置。 - 前記半導体層上にはゲート電極が形成され、前記ゲート電極の側壁には絶縁スペーサー膜が形成され、
前記逆導電型の拡散層は、少なくとも前記ドレイン拡散層上に位置する前記ゲート電極の端部及び前記絶縁スペーサー膜の下方に配置されることを特徴とする請求項1に記載の半導体装置。 - 前記一導電型の半導体層は、逆導電型の半導体基板に形成されることを特徴とする請求項1または請求項2に記載の半導体装置。
- 半導体層に一導電型のドレイン拡散層、逆導電型のバックゲート拡散層、一導電型のソース拡散層を形成し、前記半導体層上にゲート電極を形成し、前記ゲート電極の側壁に絶縁スペーサー膜を形成する半導体装置の製造方法において、
前記半導体層に前記ドレイン拡散層を構成する低濃度の第1の拡散層を形成し、前記半導体層上にゲート電極を形成し、前記ゲート電極をマスクの一部として用い前記低濃度の第1の拡散層に重畳するように逆導電型の拡散層を形成し、
前記ゲート電極の側壁に絶縁スペーサー膜を形成し、前記絶縁スペーサー膜をマスクの一部として用い前記低濃度の第1の拡散層に重畳し、前記逆導電型の拡散層とPN接合領域を形成するように前記ドレイン拡散層を構成する高濃度の第2の拡散層を形成した後、
前記高濃度の第2の拡散層に接続するドレイン電極及びドレイン配線層を形成し、前記逆導電型の拡散層はフローティング拡散層とすることを特徴とする半導体装置の製造方法。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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JP2009035645A JP5525736B2 (ja) | 2009-02-18 | 2009-02-18 | 半導体装置及びその製造方法 |
CN201010121457XA CN101807599B (zh) | 2009-02-18 | 2010-02-11 | 半导体装置及其制造方法 |
US12/707,734 US8314458B2 (en) | 2009-02-18 | 2010-02-18 | Semiconductor device and method of manufacturing the same |
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JP2009035645A JP5525736B2 (ja) | 2009-02-18 | 2009-02-18 | 半導体装置及びその製造方法 |
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JP2010192693A JP2010192693A (ja) | 2010-09-02 |
JP5525736B2 true JP5525736B2 (ja) | 2014-06-18 |
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US (1) | US8314458B2 (ja) |
JP (1) | JP5525736B2 (ja) |
CN (1) | CN101807599B (ja) |
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JP2013008715A (ja) * | 2011-06-22 | 2013-01-10 | Semiconductor Components Industries Llc | 半導体装置 |
CN102842603B (zh) * | 2011-06-23 | 2015-03-25 | 中国科学院微电子研究所 | Mosfet及其制造方法 |
US9236472B2 (en) | 2012-04-17 | 2016-01-12 | Freescale Semiconductor, Inc. | Semiconductor device with integrated breakdown protection |
JP5978031B2 (ja) * | 2012-07-03 | 2016-08-24 | 株式会社日立製作所 | 半導体装置 |
DE112013006080T5 (de) * | 2012-12-19 | 2015-08-27 | Knowles Electronics, Llc | Vorrichtung und Verfahren für einen Hochspannungs-E/A-Elektrostatikentladungsschutz |
JP6656968B2 (ja) * | 2016-03-18 | 2020-03-04 | エイブリック株式会社 | Esd保護素子を有する半導体装置 |
CN106847809B (zh) * | 2017-02-23 | 2018-09-04 | 无锡新硅微电子有限公司 | 用于片上集成的整流桥结构 |
CN116387363B (zh) * | 2023-05-08 | 2024-01-09 | 上海晶岳电子有限公司 | 一种ldmos工艺tvs器件及其制造方法 |
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2009
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