The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 22, 2022
Filed:
Jan. 08, 2020
Infineon Technologies Dresden Gmbh & Co. KG, Dresden, DE;
Erich Griebl, Dorfen, DE;
Markus Beninger-Bina, Grosshelfendorf, DE;
Matteo Dainese, Munich, DE;
Ingo Dirnstorfer, Dresden, DE;
Infineon Technologies Dresden GmbH & Co. KG, Dresden, DE;
Abstract
A method of forming a power semiconductor device includes: arranging a control electrode at least partially on or inside a semiconductor body; forming elevated source regions in the semiconductor body by: implanting first conductivity type dopants into the semiconductor body; forming a recess mask layer covering at least areas of intended source regions; and removing portions of the semiconductor body uncovered by the recess mask layer to form the elevated source regions and recessed body regions at least partially between the source regions. A dielectric layer is formed on the semiconductor body. A contact hole mask layer is formed on the dielectric layer. Portions of the dielectric layer uncovered by the contact hole mask layer are removed to form a contact hole which is filled at least partially with a conductive material to establish an electrical contact with at least a portion of the elevated source and recessed body regions.