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:
Jan. 06, 1976
Filed:
Mar. 05, 1975
Applicant:
Inventors:
John Martin Shannon, Salfords, near Redhill, EN;
John Ernest Ralph, Salfords, near Redhill, EN;
Assignee:
U.S. Philips Corporation, New York, NY (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
357 30 ; 357 22 ; 357 41 ; 357 45 ;
Abstract
A semiconductor photocathode is described in which the electron emission is obtained from a P-type semiconductor into which free electrons are injected from the source or drain of an FET whose channel is normally blocked. Incident photons absorbed in the channel region unblock the FET causing electron emission. Preferably, the device comprises an imaging array of FET's and associated electron emitters.