JPH04107877A - 半導体装置及びその製造方法 - Google Patents

半導体装置及びその製造方法

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Publication number
JPH04107877A
JPH04107877A JP2225797A JP22579790A JPH04107877A JP H04107877 A JPH04107877 A JP H04107877A JP 2225797 A JP2225797 A JP 2225797A JP 22579790 A JP22579790 A JP 22579790A JP H04107877 A JPH04107877 A JP H04107877A
Authority
JP
Japan
Prior art keywords
area
extended drain
region
type
drain region
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP2225797A
Other languages
English (en)
Other versions
JP2991753B2 (ja
Inventor
Yuji Yamanishi
山西 雄司
Hiroshi Tanida
宏 谷田
Seiki Yamaguchi
山口 誠毅
Hideo Kawasaki
川崎 英夫
Hiroyuki Shindo
裕之 進藤
Toshihiko Uno
宇野 利彦
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electronics Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electronics Corp filed Critical Matsushita Electronics Corp
Priority to JP2225797A priority Critical patent/JP2991753B2/ja
Publication of JPH04107877A publication Critical patent/JPH04107877A/ja
Application granted granted Critical
Publication of JP2991753B2 publication Critical patent/JP2991753B2/ja
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L29/00Semiconductor 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
    • H01L29/02Semiconductor bodies ; Multistep manufacturing processes therefor
    • H01L29/06Semiconductor 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
    • H01L29/0603Semiconductor 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 particular constructional design considerations, e.g. for preventing surface leakage, for controlling electric field concentration or for internal isolations regions
    • H01L29/0607Semiconductor 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 particular constructional design considerations, e.g. for preventing surface leakage, for controlling electric field concentration or for internal isolations regions for preventing surface leakage or controlling electric field concentration
    • H01L29/0611Semiconductor 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 particular constructional design considerations, e.g. for preventing surface leakage, for controlling electric field concentration or for internal isolations regions for preventing surface leakage or controlling electric field concentration for increasing or controlling the breakdown voltage of reverse biased devices
    • H01L29/0615Semiconductor 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 particular constructional design considerations, e.g. for preventing surface leakage, for controlling electric field concentration or for internal isolations regions for preventing surface leakage or controlling electric field concentration for increasing or controlling the breakdown voltage of reverse biased devices by the doping profile or the shape or the arrangement of the PN junction, or with supplementary regions, e.g. junction termination extension [JTE]
    • H01L29/063Reduced surface field [RESURF] pn-junction structures
    • H01L29/0634Multiple reduced surface field (multi-RESURF) structures, e.g. double RESURF, charge compensation, cool, superjunction (SJ), 3D-RESURF, composite buffer (CB) structures
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L29/00Semiconductor 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
    • H01L29/66Types of semiconductor device ; Multistep manufacturing processes therefor
    • H01L29/68Types 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
    • H01L29/76Unipolar devices, e.g. field effect transistors
    • H01L29/772Field effect transistors
    • H01L29/78Field effect transistors with field effect produced by an insulated gate
    • H01L29/7833Field effect transistors with field effect produced by an insulated gate with lightly doped drain or source extension, e.g. LDD MOSFET's; DDD MOSFET's
    • H01L29/7835Field effect transistors with field effect produced by an insulated gate with lightly doped drain or source extension, e.g. LDD MOSFET's; DDD MOSFET's with asymmetrical source and drain regions, e.g. lateral high-voltage MISFETs with drain offset region, extended drain MISFETs
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L29/00Semiconductor 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
    • H01L29/02Semiconductor bodies ; Multistep manufacturing processes therefor
    • H01L29/06Semiconductor 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
    • H01L29/08Semiconductor 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
    • H01L29/0843Source or drain regions of field-effect devices
    • H01L29/0847Source or drain regions of field-effect devices of field-effect transistors with insulated gate
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L29/00Semiconductor 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
    • H01L29/02Semiconductor bodies ; Multistep manufacturing processes therefor
    • H01L29/06Semiconductor 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
    • H01L29/10Semiconductor 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 not carrying current to be rectified, amplified or switched and such electrode being part of a semiconductor device which comprises three or more electrodes
    • H01L29/1025Channel region of field-effect devices
    • H01L29/1029Channel region of field-effect devices of field-effect transistors
    • H01L29/1033Channel region of field-effect devices of field-effect transistors with insulated gate, e.g. characterised by the length, the width, the geometric contour or the doping structure
    • H01L29/105Channel region of field-effect devices of field-effect transistors with insulated gate, e.g. characterised by the length, the width, the geometric contour or the doping structure with vertical doping variation

Landscapes

  • Engineering & Computer Science (AREA)
  • 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)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Insulated Gate Type Field-Effect Transistor (AREA)

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。

Description

【発明の詳細な説明】 産業上の利用分野 本発明は半導体装置とその製造方法に関し、特にドレイ
ン−ソース間の降伏電圧を高くする必要があるMOSF
ETとして利用できるものである。
従来の技術 第2図に従来の高耐圧横型MO3FETの断面を示す。
ドレイン20−ソース23間の降伏電圧を高くするため
、半導体基板25内に不純物濃度の低い延長ドレイン領
域21を形成し、ドレイン20−ソース23間が逆バイ
アスされた場合、延長ドレイン領域21に空乏層が広が
るようにしている。なお、図中、16はドレイン電極、
17はソース電極、18はシリコン酸化膜、19はゲー
ト電極、22はアンチパンチスルー領域、24は基板コ
ンタクト領域である。
発明が解決しようとする課題 上記のような延長ドレイン領域をもうけた従来構造では
、逆電圧がかかったとき、延長ドレイン領域21と半導
体基板25間の接合より空乏層が広がるが、ドレイン2
0−ソース23間降伏電圧を高くするため延長ドレイン
領域21が空乏化するように延長ドレイン領域21の濃
度を低くしなければならない。このことによって高耐圧
は実現できるが、延長ドレイン領域21内の抵抗成分が
大きくなり、MOSFETのドレイン20−ソース23
間オン抵抗が大きくなってしまい、動作時の損失が大き
くなり、大電流を流すためには、素子サイズを大きくし
なければならなくなるという欠点があった。
課題を解決するための手段 上記の問題点を解決するため、本発明では、第1導電型
半導体基板に設けた第2導電型のソース領域とドレイン
コンタクト領域との間に、上記ドレインコンタクト領域
に接する第2導電型の延長ドレイン領域を設け、この延
長ドレイン領域内に延長ドレイン領域と逆バイアスされ
た第1導電型領域を設け、延長ドレイン領域とソース領
域間の半導体基板表面をチャネル領域とし、このチャネ
ル領域上にゲート酸化膜を介してゲート電極を設けた製
造としている。
作   用 このような本発明の構造をとることで高耐圧を実現しつ
つ、ドレイン−ソース間オン抵抗を大幅に低下すること
ができる。
実施例 第1図に本発明の半導体装置の一実施例におけるNチャ
ネルMOSFETの断面を示す。延長ドレイン領域11
の表面濃度は約lX10cm  とし、この延長ドレイ
ン領域11内にP型領域10を形成し、このP型領域1
0の濃度は5X10  cm以上とした。半導体基板1
5の濃度は3×10140I11−3とし、半導体基板
15の表面のシリコン酸化膜8の厚さは2μm以上とし
た。ゲート電極7には多結晶シリコン膜を使用した。ゲ
ートを極7下に位置するシリコン酸化膜がゲート酸化膜
となる。P型領域10を形成するには、まず延長ドレイ
ン領域11を、半導体基板15へのイオン注入、不純物
ドープ、拡散で形成した後、P型領域10の不純物をド
ープするため延長ドレイン領域11にボロンをイオン注
入し、若干の熱処理をおこなった後、半導体基板15の
表面を熱酸化する。このことでシリコン酸化膜8とシリ
コン間のボロンの偏析係数が異なることから、基板15
表面のボロン濃度が低下しN型となり、P型領域は型延
長ドレイン領域11中に埋め込まれた構造となる。この
P型領域10をドレイン領域11と逆バイアスすること
で延長ドレイン領域11と半導体基板15間、及び上記
延長ドレイン領域11中のP型領域10と延長ドレイン
領域11間に空乏層が広がる。したがって従来構造の場
合とちがって、延長ドレイン領域11のi1度を高くし
ても、延長ドレイン領域11を空乏化できる。したがっ
てドレイン−ソース間オン抵抗を従来構造のMOSFE
Tよりも小さくすることができる。このことで従来構造
のMOSFETと比較して単位面積当りのトレイン−ソ
ース間オン抵抗は1775〜17′6にできた。
発明の効果 以上のように本発明によれば、高耐圧横型MOSFET
のチップサイズを縮小することができる。
【図面の簡単な説明】
第1図は本発明の一実施例におけるNチャネルMOSF
ETの断面図、第2図は従来の高耐圧横型MO5FET
の断面図である。 ■・・・・・・ドレイン端子、2・・・・・延長トレイ
ン中P型領域電極端子、3・・・・・・ゲート電子、4
・・・・・・ソース端子、5・・・・・・ドレイン電極
、6・・・・・・ソース電極、7・・・・・・ゲート電
極、8・・・・・・シリコン酸化膜、9・・・・・・ド
レインコンタクト領域、10・・・・・・延長ドレイン
領域内P型領域、11・・・・・・延長ドレイン領域、
12・・・・・・アンチバンチスルー領域、13・・・
・・・ソース領域、14・・・・・・基板コンタクト領
域、15・・・・・・半導体基板。

Claims (2)

    【特許請求の範囲】
  1. (1)第1導電型半導体基板に設けた第2導電型のソー
    ス領域とドレインコンタクト領域との間に、上記ドレイ
    ンコンタクト領域に接する第2導電型の延長ドレイン領
    域を設け、上記延長ドレイン領域内に延長ドレイン領域
    と逆バイアスされた第1導電型領域を設け、延長ドレイ
    ン領域とソース領域間の半導体基板表面をチャネル領域
    とし、このチャネル領域上にゲート酸化膜を介してゲー
    ト電極を設けた半導体装置。
  2. (2)請求項1記載の半導体装置をNチャネルMOSF
    ETとし、N型延長ドレイン領域内に、このドレイン領
    域と逆バイアスされた第1導電型領域としてのP型領域
    を形成する場合、延長ドレイン領域を形成してから、P
    型領域を形成するためのボロンイオン注入を行い、その
    後、表面をおおうシリコン酸化膜を形成し、P型領域表
    面の濃度を低下させて延長ドレイン領域表面の濃度より
    も低くし、P型領域を延長ドレイン領域内にとじこめる
    ようにした半導体装置の製造方法。
JP2225797A 1990-08-27 1990-08-27 半導体装置及びその製造方法 Expired - Fee Related JP2991753B2 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2225797A JP2991753B2 (ja) 1990-08-27 1990-08-27 半導体装置及びその製造方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2225797A JP2991753B2 (ja) 1990-08-27 1990-08-27 半導体装置及びその製造方法

Publications (2)

Publication Number Publication Date
JPH04107877A true JPH04107877A (ja) 1992-04-09
JP2991753B2 JP2991753B2 (ja) 1999-12-20

Family

ID=16834933

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Country Link
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Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5898201A (en) * 1994-08-12 1999-04-27 United Microelectronics Corporation Low resistance, high breakdown voltage, power mosfet
EP0967660A2 (en) * 1998-06-25 1999-12-29 Matsushita Electronics Corporation Power MOSFET and method for fabricating the same
US6043534A (en) * 1997-11-05 2000-03-28 Matsushita Electronics Corporation High voltage semiconductor device
WO2000046859A1 (en) * 1999-02-05 2000-08-10 Power Integrations, Inc. High-voltage transistor with multi-layer conduction region
US6168983B1 (en) 1996-11-05 2001-01-02 Power Integrations, Inc. Method of making a high-voltage transistor with multiple lateral conduction layers
US6312996B1 (en) 1998-10-19 2001-11-06 Matsushita Electric Industrial Co., Ltd. Semiconductor device and method for fabricating the same
US6404012B1 (en) * 1997-11-13 2002-06-11 Nec Corporation Semiconductor device having a reverse conductive type diffusion layer in an extended drain diffusion layer
US6501130B2 (en) 2001-01-24 2002-12-31 Power Integrations, Inc. High-voltage transistor with buried conduction layer
US6509220B2 (en) 2000-11-27 2003-01-21 Power Integrations, Inc. Method of fabricating a high-voltage transistor
US6635544B2 (en) 2001-09-07 2003-10-21 Power Intergrations, Inc. Method of fabricating a high-voltage transistor with a multi-layered extended drain structure
US6639277B2 (en) 1996-11-05 2003-10-28 Power Integrations, Inc. High-voltage transistor with multi-layer conduction region
US6768171B2 (en) 2000-11-27 2004-07-27 Power Integrations, Inc. High-voltage transistor with JFET conduction channels
US6781198B2 (en) 2001-09-07 2004-08-24 Power Integrations, Inc. High-voltage vertical transistor with a multi-layered extended drain structure
US6815293B2 (en) 2001-09-07 2004-11-09 Power Intergrations, Inc. High-voltage lateral transistor with a multi-layered extended drain structure
US7115958B2 (en) 2001-10-29 2006-10-03 Power Integrations, Inc. Lateral power MOSFET for high switching speeds
US7786533B2 (en) 2001-09-07 2010-08-31 Power Integrations, Inc. High-voltage vertical transistor with edge termination structure
US7859037B2 (en) 2007-02-16 2010-12-28 Power Integrations, Inc. Checkerboarded high-voltage vertical transistor layout
CN102544092A (zh) * 2010-12-16 2012-07-04 无锡华润上华半导体有限公司 Cmos器件及其制造方法
US9601613B2 (en) 2007-02-16 2017-03-21 Power Integrations, Inc. Gate pullback at ends of high-voltage vertical transistor structure
US9660053B2 (en) 2013-07-12 2017-05-23 Power Integrations, Inc. High-voltage field-effect transistor having multiple implanted layers
US10325988B2 (en) 2013-12-13 2019-06-18 Power Integrations, Inc. Vertical transistor device structure with cylindrically-shaped field plates

Cited By (44)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5898201A (en) * 1994-08-12 1999-04-27 United Microelectronics Corporation Low resistance, high breakdown voltage, power mosfet
US6570219B1 (en) 1996-11-05 2003-05-27 Power Integrations, Inc. High-voltage transistor with multi-layer conduction region
US6787437B2 (en) 1996-11-05 2004-09-07 Power Integrations, Inc. Method of making a high-voltage transistor with buried conduction regions
US6168983B1 (en) 1996-11-05 2001-01-02 Power Integrations, Inc. Method of making a high-voltage transistor with multiple lateral conduction layers
US6777749B2 (en) * 1996-11-05 2004-08-17 Power Integrations, Inc. High-voltage transistor with multi-layer conduction region
US6800903B2 (en) 1996-11-05 2004-10-05 Power Integrations, Inc. High-voltage transistor with multi-layer conduction region
US6768172B2 (en) 1996-11-05 2004-07-27 Power Integrations, Inc. High-voltage transistor with multi-layer conduction region
US6724041B2 (en) 1996-11-05 2004-04-20 Power Integrations, Inc. Method of making a high-voltage transistor with buried conduction regions
US6828631B2 (en) 1996-11-05 2004-12-07 Power Integrations, Inc High-voltage transistor with multi-layer conduction region
US6639277B2 (en) 1996-11-05 2003-10-28 Power Integrations, Inc. High-voltage transistor with multi-layer conduction region
US6633065B2 (en) 1996-11-05 2003-10-14 Power Integrations, Inc. High-voltage transistor with multi-layer conduction region
US6043534A (en) * 1997-11-05 2000-03-28 Matsushita Electronics Corporation High voltage semiconductor device
US6404012B1 (en) * 1997-11-13 2002-06-11 Nec Corporation Semiconductor device having a reverse conductive type diffusion layer in an extended drain diffusion layer
US6534829B2 (en) 1998-06-25 2003-03-18 Matsushita Electric Industrial Co., Ltd. Semiconductor device and method for fabricating the same
KR100606530B1 (ko) * 1998-06-25 2006-07-31 마츠시타 덴끼 산교 가부시키가이샤 반도체 장치
EP0967660A3 (en) * 1998-06-25 2002-08-28 Matsushita Electric Industrial Co., Ltd. Power MOSFET and method for fabricating the same
EP0967660A2 (en) * 1998-06-25 1999-12-29 Matsushita Electronics Corporation Power MOSFET and method for fabricating the same
US6312996B1 (en) 1998-10-19 2001-11-06 Matsushita Electric Industrial Co., Ltd. Semiconductor device and method for fabricating the same
WO2000046859A1 (en) * 1999-02-05 2000-08-10 Power Integrations, Inc. High-voltage transistor with multi-layer conduction region
US6509220B2 (en) 2000-11-27 2003-01-21 Power Integrations, Inc. Method of fabricating a high-voltage transistor
US6768171B2 (en) 2000-11-27 2004-07-27 Power Integrations, Inc. High-voltage transistor with JFET conduction channels
US6504209B2 (en) 2001-01-24 2003-01-07 Power Integrations, Inc. High-voltage transistor with buried conduction layer
US6501130B2 (en) 2001-01-24 2002-12-31 Power Integrations, Inc. High-voltage transistor with buried conduction layer
US6818490B2 (en) 2001-01-24 2004-11-16 Power Integrations, Inc. Method of fabricating complementary high-voltage field-effect transistors
US6781198B2 (en) 2001-09-07 2004-08-24 Power Integrations, Inc. High-voltage vertical transistor with a multi-layered extended drain structure
US7829944B2 (en) 2001-09-07 2010-11-09 Power Integrations, Inc. High-voltage vertical transistor with a multi-layered extended drain structure
US6815293B2 (en) 2001-09-07 2004-11-09 Power Intergrations, Inc. High-voltage lateral transistor with a multi-layered extended drain structure
US6750105B2 (en) 2001-09-07 2004-06-15 Power Integrations, Inc. Method of fabricating a high-voltage transistor with a multi-layered extended drain structure
US6667213B2 (en) 2001-09-07 2003-12-23 Power Integrations, Inc. Method of fabricating a high-voltage transistor with a multi-layered extended drain structure
US6838346B2 (en) 2001-09-07 2005-01-04 Power Integrations, Inc. Method of fabricating a high-voltage transistor with a multi-layered extended drain structure
US6882005B2 (en) 2001-09-07 2005-04-19 Power Integrations, Inc. High-voltage vertical transistor with a multi-layered extended drain structure
US6987299B2 (en) 2001-09-07 2006-01-17 Power Integrations, Inc. High-voltage lateral transistor with a multi-layered extended drain structure
US6635544B2 (en) 2001-09-07 2003-10-21 Power Intergrations, Inc. Method of fabricating a high-voltage transistor with a multi-layered extended drain structure
US6787847B2 (en) 2001-09-07 2004-09-07 Power Integrations, Inc. High-voltage vertical transistor with a multi-layered extended drain structure
US7745291B2 (en) 2001-09-07 2010-06-29 Power Integrations, Inc. Method of fabricating a high-voltage transistor with an extended drain structure
US7786533B2 (en) 2001-09-07 2010-08-31 Power Integrations, Inc. High-voltage vertical transistor with edge termination structure
US7115958B2 (en) 2001-10-29 2006-10-03 Power Integrations, Inc. Lateral power MOSFET for high switching speeds
EP2562819A2 (en) 2002-05-02 2013-02-27 Power Integrations, Inc. Method of fabricating a high-voltage transistor
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