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:
Oct. 14, 2025
Filed:
Feb. 10, 2023
Mitsubishi Electric Corporation, Tokyo, JP;
Katsumi Nakamura, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
In a power semiconductor device, the present disclosure is intended to control tradeoff characteristics while realizing operation in a high-speed side range of the tradeoff characteristics without depending on a carrier lifetime control technique. An n+ cathode layer includes a first n+ cathode layer contacting a second metal layer, and a second n+ cathode layer provided between the first n+ cathode layer and an n buffer layer while contacting the first n+ cathode layer and the n buffer layer. Crystal defect density in the first n+ cathode layer is higher than crystal defect density in the second n+ cathode layer. The n+ cathode layer is absent in an intermediate region and a terminal region.