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:
May. 23, 1995
Filed:
Feb. 28, 1994
Applicant:
Inventors:
Assignee:
Toyo Denki Seizo Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
257136 ; 257260 ; 257264 ; 257281 ; 257475 ; 257498 ;
Abstract
The present invention is to provide a static induction semiconductor device with a distributed main electrode structure and a static induction semiconductor device with a static induction main electrode shorted structure where the main electrode region is composed of regions of higher and lower impurity densities relative to each other and formed partly in contact with the lower impurity density region as well, and alternatively a static induction short-circuit region opposite in conductivity type to the main electrode region is formed in the lower impurity density region surrounded by the higher impurity density region.