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:
Feb. 25, 1986
Filed:
May. 29, 1984
Applicant:
Inventors:
Yu C Kao, Pittsburgh, PA (US);
Scott G Leslie, Penn Hills, PA (US);
Assignee:
Westinghouse Electric Corp., Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ; H01J / ;
U.S. Cl.
CPC ...
2502 / ; 338 17 ; 338 18 ; 357 30 ;
Abstract
The present invention provides a method for triggering a light triggered thyristor (LT.sup.2) which method comprises using a light source to provide background excitation of carriers in at least the amplifying gate areas of the LT.sup.2 prior to triggering the device. The background excitation is of a low level and will not trigger the device or cause excessive leakage current. At the desired time a second light signal is used to trigger the LT.sup.2.