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:
Dec. 24, 1985
Filed:
Jan. 18, 1978
Applicant:
Inventor:
Hans W Becke, Morristown, NJ (US);
Assignee:
RCA Corporation, Princeton, NJ (US);
Primary Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
357 38 ; 357 20 ; 357 36 ; 357 68 ; 357 86 ;
Abstract
A gate controlled semiconductor device comprises a cathode region having a current defocusing region associated therewith. The defocusing region is unmetallized but substantially completely surrounded by cathode metallization. The defocusing region comprises only a relatively small percentage of the total cathode region and conducts current during the on-state of the device. However, during turn-off of the device substantially all of the conducting plasma is forced to flow in the defocusing region.