Global Patent Index - EP 3224869 A1

EP 3224869 A1 2017-10-04 - VERTICALL STRUCTURED POWER TRANSISTOR WITH TRENCH SUPPLY ELECTRODE

Title (en)

VERTICALL STRUCTURED POWER TRANSISTOR WITH TRENCH SUPPLY ELECTRODE

Title (de)

VERTIKALER STRUKTURIERTER LEISTUNGSTRANSISTOR MIT GRABENANSCHLUSSELEKTRODE

Title (fr)

TRANSISTOR DE PUISSANCE A STRUCTURE VERTICALE ET A ÉLECTRODE D'ALIMENTATION EN TRANCHEE

Publication

EP 3224869 A1 (FR)

Application

EP 15817449 A

Priority

  • FR 1461381 A
  • FR 2015053189 W

Abstract (en)

[origin: WO2016083725A1] The invention relates to a vertically structured power transistor, such as a VDMOS or an IGBT, having a cell comprising: two symmetrical source layers (308), preferably N+ doped, which extend from a front surface (312) of the semiconductor substrate; a well layer (307), preferably P doped, comprising an area having a higher doping concentration (307b) that extends from one source layer to the other; a source/well NP junction (J3) between the source layer and the well layer. According to the invention, a cathode formed on the front surface (312) of the semiconductor substrate has a trench portion (309) with a bottom (313) that extends into the area having a higher doping concentration (307b) of the well layer (307) to a certain depth away from the source/well NP junction (J3).

IPC 8 full level (invention and additional information)

H01L 29/78 (2006.01); H01L 21/331 (2006.01); H01L 21/336 (2006.01); H01L 29/10 (2006.01); H01L 29/417 (2006.01); H01L 29/739 (2006.01)

CPC (invention and additional information)

H01L 29/7802 (2013.01); H01L 29/1095 (2013.01); H01L 29/41766 (2013.01); H01L 29/6634 (2013.01); H01L 29/66727 (2013.01); H01L 29/7396 (2013.01)

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

Designated extension state (EPC)

BA ME

EPO simple patent family

FR 3029014 A1 20160527; EP 3224869 A1 20171004; US 2017309738 A1 20171026; WO 2016083725 A1 20160602

INPADOC legal status


2018-02-28 [DAV] REQUEST FOR VALIDATION OF THE EUROPEAN PATENT (IN ANY COUNTRY) (DELETED)

2018-02-28 [DAX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT (TO ANY COUNTRY) (DELETED)

2017-10-04 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20170622

2017-10-04 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

2017-10-04 [AV] REQUEST FOR VALIDATION OF THE EUROPEAN PATENT IN:

- Countries: MA MD

2017-10-04 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO:

- Countries: BA ME