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:
Mar. 30, 1976
Filed:
Jun. 12, 1974
John Martin Shannon, Whyteleafe, EN;
John Ernest Ralph, Crawley Down, EN;
Pieter Schagen, Redhill, EN;
U.S. Philips Corporation, New York, NY (US);
Abstract
An electronic solid state device comprising a layer in which the electrical conductivity is controlled by a plurality of isolated discrete regions distributed within the bulk of the layer and forming potential barriers with semi conductor material of the layer surrounding the discrete regions. Electrical charge is stored in the layer by the discrete regions and the charging is obtained by the application of a potential pulse across the discrete regions. In a preferred operational mode the charging potential is applied such that current conduction paths in the layer are blocked by the depletion regions associated with the potential barrier for applied interrogation potentials across the regions of substantially smaller magnitude than the charging pulse. The device may consist of an imaging device having high charges gain and particular embodiments described consist of an image intensifier, an imaging active photocathode and a target plate of a vidicon camera tube.