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:
Sep. 02, 1986
Filed:
Oct. 18, 1984
Applicant:
Inventors:
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ; H01L / ;
U.S. Cl.
CPC ...
357 38 ; 357 91 ; 357 55 ;
Abstract
A gate turn-off thyristor including N-type emitter regions (4) formed in part in the surface layer of a P-type base layer (3), and P.sup.+ layer regions (10) of a high impurity concentration formed immediately beneath gate electrodes (8) in the P-type base layer (3) and immediately beneath the periphery of the N-type emitter regions (4), such that the depth of the P.sup.+ layer regions immediately beneath the gate electrodes (8) is selected to be deeper than the N-type emitter regions (4).