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:
May. 25, 1982
Filed:
Jan. 28, 1981
Applicant:
Inventor:
Arthur F McDonie, Lancaster, PA (US);
Assignee:
RCA Corporation, New York, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
B05D / ; B05D / ; B05D / ;
U.S. Cl.
CPC ...
427 10 ; 148 63 ; 427 74 ;
Abstract
A film of either manganese or antimony is evaporated onto a substrate within an evacuated enclosure. Oxygen is introduced into the enclosure to oxidize the film. A layer of antimony is then deposited onto the oxidized film to a predetermined thickness measured by the transmission of light through the substrate. Rubidium and cesium are then evaporated onto the antimony layer after which the substrate is heated to promote an activating reaction between the rubidium, cesium and antimony. Photocathodes formed in this manner, without superficial oxidation, typically have sensitivities within the range of 80-130 microamperes per lumen.