(19)
(11) EP 4 483 421 A1

(12)

(43) Date of publication:
01.01.2025 Bulletin 2025/01

(21) Application number: 22720645.5

(22) Date of filing: 04.04.2022
(51) International Patent Classification (IPC): 
H01L 29/739(2006.01)
H01L 29/06(2006.01)
H01L 21/336(2006.01)
 H01L 29/78(2006.01)
H01L 29/10(2006.01)
H01L 21/331(2006.01)
(52) Cooperative Patent Classification (CPC):
H01L 29/7397; H01L 29/66348; H01L 29/1095; H01L 29/0696; H01L 29/66734; H01L 29/7813; H01L 29/7811; H01L 29/0619; H01L 29/0623; H01L 29/0878; H01L 29/0615
(86) International application number:
PCT/EP2022/058872
(87) International publication number:
WO 2023/193875 (12.10.2023 Gazette 2023/41)
(84) Designated Contracting States:
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 States:
BA ME
Designated Validation States:
KH MA MD TN

(71) Applicant: Huawei Digital Power Technologies Co., Ltd.
Shenzhen, Guangdong 518043 (CN)

(72) Inventors:
  • MOUHOUBI, Samir
    80992 Munich (DE)
  • CURATOLA, Gilberto
    80992 Munich (DE)
  • SLEDZIEWSKI, Tomasz
    80992 Munich (DE)

(74) Representative: Gill Jennings & Every LLP 
The Broadgate Tower 20 Primrose Street
London EC2A 2ES
London EC2A 2ES (GB)

   


(54) ELEMENTARY CELL FOR A TRENCH-GATE SEMICONDUCTOR DEVICE, TRENCH-GATE SEMICONDUCTOR DEVICE AND METHOD FOR PRODUCING SUCH ELEMENTARY CELL