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. 27, 2001
Filed:
Dec. 18, 1998
Applicant:
Inventors:
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H01L 2/348 ; H01L 2/974 ; H01L 2/342 ;
U.S. Cl.
CPC ...
H01L 2/348 ; H01L 2/974 ; H01L 2/342 ;
Abstract
In a GCT device which controls large current at the operating frequency of 1 kHz or more, a ring-shaped gate terminal (,) is made of a magnetic material with the maximum permeability of 15,000 or less in the CGS Gaussian system of units. Further, in the outer end portion of an outer plane portion (,O) of the ring-shaped gate terminal (,), a plurality of slits extending diametrically are provided along the circumference to be coupled to mounting holes (,).