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:
Nov. 30, 2021
Filed:
Oct. 05, 2017
Mitsubishi Electric Corporation, Tokyo, JP;
MITSUBISHI ELECTRIC CORPORATION, Tokyo, JP;
Abstract
A superjunction layer includes first pillars of a first conductivity type and second pillars of a second conductivity type. First wells are provided respectively on the second pillars to reach the first pillars and are of the second conductivity type. First impurity regions are provided respectively on the first wells and are of the first conductivity type. Second wells are provided respectively on the first pillars, spaced from the second pillars in a section of an active region that is perpendicular to a semiconductor layer, and are of the second conductivity type. Second impurity regions are provided respectively on the second wells and are of the first conductivity type.