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1. JP2005019734 - SEMICONDUCTOR DEVICE AND ITS MANUFACTURING METHOD

Office Japan
Application Number 2003183153
Application Date 26.06.2003
Publication Number 2005019734
Publication Date 20.01.2005
Grant Number 4860102
Grant Date 11.11.2011
Publication Kind B2
IPC
H01L 29/06
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
LSEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
29Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having at least one potential-jump barrier or surface barrier; Capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof
02Semiconductor bodies
06characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions
H01L 21/336
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
LSEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
21Processes or apparatus specially adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
02Manufacture or treatment of semiconductor devices or of parts thereof
04the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer, carrier concentration layer
18the devices having semiconductor bodies comprising elements of group IV of the Periodic System or AIIIBV compounds with or without impurities, e.g. doping materials
334Multistep processes for the manufacture of devices of the unipolar type
335Field-effect transistors
336with an insulated gate
H01L 29/78
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
LSEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
29Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having at least one potential-jump barrier or surface barrier; Capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof
66Types of semiconductor device
68controllable 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
76Unipolar devices
772Field-effect transistors
78with field effect produced by an insulated gate
CPC
H01L 29/7811
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
LSEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
29Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof; ; Multistep manufacturing processes therefor
66Types of semiconductor device ; ; Multistep manufacturing processes therefor
68controllable 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
76Unipolar devices ; , e.g. field effect transistors
772Field effect transistors
78with field effect produced by an insulated gate
7801DMOS transistors, i.e. MISFETs with a channel accommodating body or base region adjoining a drain drift region
7802Vertical DMOS transistors, i.e. VDMOS transistors
7811with an edge termination structure
H01L 29/0619
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
LSEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
29Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof; ; Multistep manufacturing processes therefor
02Semiconductor bodies ; ; Multistep manufacturing processes therefor
06characterised 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
0603characterised by particular constructional design considerations, e.g. for preventing surface leakage, for controlling electric field concentration or for internal isolations regions
0607for preventing surface leakage or controlling electric field concentration
0611for increasing or controlling the breakdown voltage of reverse biased devices
0615by the doping profile or the shape or the arrangement of the PN junction, or with supplementary regions, e.g. junction termination extension [JTE]
0619with a supplementary region doped oppositely to or in rectifying contact with the semiconductor containing or contacting region, e.g. guard rings with PN or Schottky junction
H01L 29/0638
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
LSEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
29Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof; ; Multistep manufacturing processes therefor
02Semiconductor bodies ; ; Multistep manufacturing processes therefor
06characterised 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
0603characterised by particular constructional design considerations, e.g. for preventing surface leakage, for controlling electric field concentration or for internal isolations regions
0607for preventing surface leakage or controlling electric field concentration
0638for preventing surface leakage due to surface inversion layer, e.g. with channel stopper
H01L 29/0696
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
LSEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
29Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof; ; Multistep manufacturing processes therefor
02Semiconductor bodies ; ; Multistep manufacturing processes therefor
06characterised 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
0684characterised by the shape, relative sizes or dispositions of the semiconductor regions or junctions between the regions
0692Surface layout
0696of cellular field-effect devices, e.g. multicellular DMOS transistors or IGBTs
H01L 29/1095
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
LSEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
29Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof; ; Multistep manufacturing processes therefor
02Semiconductor bodies ; ; Multistep manufacturing processes therefor
06characterised 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
10with 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
1095Body region, i.e. base region, of DMOS transistors or IGBTs
H01L 29/407
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
LSEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
29Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof; ; Multistep manufacturing processes therefor
40Electrodes ; ; Multistep manufacturing processes therefor
402Field plates
407Recessed field plates, e.g. trench field plates, buried field plates
Applicants RENESAS TECHNOLOGY CORP
ルネサスエレクトロニクス株式会社
Inventors NAKAZAWA YOSHITO
中沢 芳人
YATSUDA YUJI
谷ッ田 雄司
Agents 筒井 大和
Title
(EN) SEMICONDUCTOR DEVICE AND ITS MANUFACTURING METHOD
(JA) 半導体装置
Abstract
(EN)

PROBLEM TO BE SOLVED: To realize a high breakdown voltage of a trench gate type power MISFET (metal insulator semiconductor field effect transistor) without increasing the number of manufacturing processes.

SOLUTION: In the same contaminant ions introducing process, a p-type semiconductor region 10 and a p-type field limiting ring 11 are collectively formed in a gate line area GLA while integrating them so as to be in contact with a groove 5, in which a gate lead out electrode 8 is formed. In this case, when the width of a part in the gate lead out electrode 8, which is arranged outside the groove 5, is shown by CHSP and the resistivity of an n-type single crystal silicon layer 1B is shown by ( cm), the width CHSP is set so as to be CHSP3.80+0.148.

COPYRIGHT: (C)2005,JPO&NCIPI

(JA)

【課題】製造工程数を増加することなくトレンチゲート型パワーMISFETの高耐圧化を実現する。
【解決手段】同一の不純物イオン導入工程にて、ゲート配線領域GLAでp型半導体領域10およびp型フィールドリミッティングリング11をゲート引き出し電極8の形成された溝5と接するように一括して、形成する。その際、ゲート引き出し電極8のうち溝5の外部に配置された部分の幅をCHSPとし、n型単結晶シリコン層1Bの抵抗率をρ(Ω・cm)とすると、CHSP≦3.80+0.148ρとなるようにそのCHSPを設定する。
【選択図】 図9