Method for and product of electron emissive layer and multibeam CRT thereby (USH0000216)
Original Publication Date: 1987-Feb-03
Included in the Prior Art Database: 2008-Mar-23
US Statutory Invention Registration (SIRs)
Related DocumentsPatent/Patent Application:
An encapsulated planar cathode structure is formed for a vacuum tube. A multibeam cathode ray tube is obtained by heating in the CRT such a structure with a plurality of separated electron emissive layers to remove the encapsulation material. Positive photoresist technology is utilized: for obtaining delineated apertures on a planar metallization layer supported by an insulating substrate into which needle-shaped carbonate particles are deposited electrophoretically normal to the metallization; and for encapsulating the resultant cathodes.