Browse Prior Art Database

Method for and product of electron emissive layer and multibeam CRT thereby (USH0000216) Disclosure Number: IPCOM000000216D
Original Publication Date: 1987-Feb-03
Included in the Prior Art Database: 2008-Mar-23

Publishing Venue

US Statutory Invention Registration (SIRs)

Related People

Piggin, Bruce P. [+details]

Related Documents

Patent/Patent Application:
USH000216 US06/733004 [+details]


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.