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1. WO2012002999 - STRUCTURES D'ANNEAU DE GARDE DE TRANSISTOR À JONCTIONS BIPOLAIRE ET LEUR PROCÉDÉ DE FABRICATION

Numéro de publication WO/2012/002999
Date de publication 05.01.2012
N° de la demande internationale PCT/US2011/001167
Date du dépôt international 01.07.2011
CIB
H01L 29/06 2006.01
HÉLECTRICITÉ
01ÉLÉMENTS ÉLECTRIQUES FONDAMENTAUX
LDISPOSITIFS À SEMI-CONDUCTEURS; DISPOSITIFS ÉLECTRIQUES À L'ÉTAT SOLIDE NON PRÉVUS AILLEURS
29Dispositifs à semi-conducteurs spécialement adaptés au redressement, à l'amplification, à la génération d'oscillations ou à la commutation et ayant au moins une barrière de potentiel ou une barrière de surface; Condensateurs ou résistances ayant au moins une barrière de potentiel ou une barrière de surface, p.ex. jonction PN, région d'appauvrissement, ou région de concentration de porteurs de charges; Détails des corps semi-conducteurs ou de leurs électrodes
02Corps semi-conducteurs
06caractérisés par leur forme; caractérisés par les formes, les dimensions relatives, ou les dispositions des régions semi-conductrices
H01L 21/331 2006.01
HÉLECTRICITÉ
01ÉLÉMENTS ÉLECTRIQUES FONDAMENTAUX
LDISPOSITIFS À SEMI-CONDUCTEURS; DISPOSITIFS ÉLECTRIQUES À L'ÉTAT SOLIDE NON PRÉVUS AILLEURS
21Procédés ou appareils spécialement adaptés à la fabrication ou au traitement de dispositifs à semi-conducteurs ou de dispositifs à l'état solide, ou bien de leurs parties constitutives
02Fabrication ou traitement des dispositifs à semi-conducteurs ou de leurs parties constitutives
04les dispositifs présentant au moins une barrière de potentiel ou une barrière de surface, p.ex. une jonction PN, une région d'appauvrissement, ou une région de concentration de porteurs de charges
18les dispositifs ayant des corps semi-conducteurs comprenant des éléments du groupe IV de la classification périodique, ou des composés AIIIBV, avec ou sans impuretés, p.ex. des matériaux de dopage
328Procédés comportant plusieurs étapes pour la fabrication de dispositifs du type bipolaire, p.ex. diodes, transistors, thyristors
33les dispositifs comportant trois électrodes ou plus
331Transistors
CPC
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 29/0623
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
0623Buried supplementary region, e.g. buried guard ring
H01L 29/0661
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
0657characterised by the shape of the body
0661specially adapted for altering the breakdown voltage by removing semiconductor material at, or in the neighbourhood of, a reverse biased junction, e.g. by bevelling, moat etching, depletion etching
H01L 29/1608
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
12characterised by the materials of which they are formed
16including, apart from doping materials or other impurities, only elements of Group IV of the Periodic System
1608Silicon carbide
H01L 29/2203
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
12characterised by the materials of which they are formed
22including, apart from doping materials or other impurities, only AIIBVI compounds
2203Cd X compounds being one element of the 6th group of the Periodic System
H01L 29/66068
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
66007Multistep manufacturing processes
66053of devices having a semiconductor body comprising crystalline silicon carbide
66068the 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
Déposants
  • NORTHROP GRUMMAN SYSTEMS CORPORATION [US/US]; 2980 Fairview Park Drive Falls Church, VA 22042, US (AllExceptUS)
  • VELIADIS, John, V. [US/US]; US (UsOnly)
Inventeurs
  • VELIADIS, John, V.; US
Mandataires
  • WOODEN, Sean, S.; Andrews Kurth LLP 1350 I Street, N.W. Suite 1100 Washington, DC 20005, US
Données relatives à la priorité
12/828,64601.07.2010US
Langue de publication anglais (EN)
Langue de dépôt anglais (EN)
États désignés
Titre
(EN) BIPOLAR JUNCTION TRANSISTOR GUARD RING STRUCTURES AND METHOD OF FABRICATING THEREOF
(FR) STRUCTURES D'ANNEAU DE GARDE DE TRANSISTOR À JONCTIONS BIPOLAIRE ET LEUR PROCÉDÉ DE FABRICATION
Abrégé
(EN)
Semiconductor devices with multiple floating guard ring edge termination structures and methods of fabricating same are disclosed. A method for fabricating guard rings in a semiconductor device that includes forming a mesa structure on a semiconductor layer stack, the semiconductor stack including two or more layers of semiconductor materials including a first layer and a second layer, said second layer being on top of said first layer, forming trenches for guard rings in the first layer outside a periphery of said mesa, and forming guard rings in the trenches. The top surfaces of said guard rings have a lower elevation than a top surface of said first layer.
(FR)
Cette invention se rapporte à des dispositifs à semi-conducteur qui présentent des structures de terminaison de bord d'anneau de garde flottantes et à leurs procédés de fabrication. Cette invention se rapporte à un procédé destiné à fabriquer des anneaux de garde dans un dispositif à semi-conducteur qui comprend les étapes consistant à : former une structure mésa sur une pile de couches semi-conductrices, la pile semi-conductrice comprenant deux couches ou plus de matériaux semi-conducteurs comprenant une première couche et une seconde couche, ladite seconde couche se situant au-dessus de ladite première couche; former des tranchées pour des anneaux de garde dans la première couche à l'extérieur de la périphérie dudit mésa; et former des anneaux de garde dans les tranchées. Les surfaces supérieures desdits anneaux de garde présentent une élévation plus petite que celle d'une surface supérieure de ladite première couche.
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