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. 02, 1982
Filed:
Dec. 26, 1978
Applicant:
Inventors:
Richard W Longsderff, Lancaster, PA (US);
Dale V Henry, Lancaster, PA (US);
Assignee:
RCA Corporation, New York, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
H01J / ; H01J / ;
U.S. Cl.
CPC ...
427 74 ; 316-3 ; 316-5 ; 316-6 ; 427107 ; 427237 ; 427250 ; 264 15 ;
Abstract
A film of photoemissive material, such as antimony, is vaporized from a platinum-antimony source onto a substrate in an enclosure. The source is preferably a plurality of beads formed by attaching substantially spherical particles of platinum-antimony (50--50 by atomic volume) to a platinum-clad molybdenum wire. The spherical particles are accurately sized so that each bead comprises substantially the same amount of antimony. The beads are symmetrically arranged about the substrate so that upon evaporation a substantially uniform film of photoemissive material is deposited on the substrate.