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. 29, 1977
Filed:
Jun. 21, 1976
Douglas E Houston, Ballston Lake, NY (US);
Surinder Krishna, Ballston Lake, NY (US);
General Electric Co., Schenectady, NY (US);
Abstract
A novel grid structure for a field controlled thyristor includes a current controlling grid structure interdigitated with a cathode structure in which the surface area of the cathode structure is substantially greater than that of the grid structure. High forward blocking voltage gain (anode voltage/grid voltage) and low on-state losses in a turn-off type field controlled thyristor are accomplished by providing a surface grid portion and a buried portion which are connected to the surface grid structure and substantially underlies the cathode structure. The buried grid structure is constructed in a manner to provide a high aspect ratio for the channel region.