Cataphoretic process for screening color cathode ray tubes

Details Cataphoretic process for screening color cathode ray tubes Cataphoretic process for screening color cathode ray tubes

G - Physics

03

C

96/231

G03C 7/12 (2006.01) H01J 9/22 (2006.01) H01J 9/227 (2006.01)

Patent

CA 1328763

Abstract An improved cataphoretic process is dis- closed for use in the manufacture of a color cathode ray tube. The process provides for depositing in sequence on the tube screening surface at least two separate pat- terns of phosphor elements, with each pattern of elements capable of emitting light of a different color when ex- cited. The process according to the invention comprises first depositing an electrically conductive coating over the screening surface for use as an electrode during each deposition operation. Second, an electrically insulative barrier is deposited over the conductive coating. Por- tions of the barrier are removed selectively and sequen- tially for controlling patterned, sequenced cataphoretic access to the electrically conductive coating.

566418

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