Color cathode-ray tube having a heat dissipative electron...

Details Color cathode-ray tube having a heat dissipative electron... Color cathode-ray tube having a heat dissipative electron...

H - Electricity

01

J

316/12, 313/35.1

H01J 29/07 (2006.01) H01J 9/14 (2006.01)

Patent

CA 1312911

RCA 83,606 ABSTRACT OF THE DISCLOSURE A color cathode-ray tube comprises an evacuated envelope having an electron gun for producing at least one electron beam, and preferably three beams, a phosphor screen, and a shadow mask adjacent to the screen. The mask has an improved heat dissipative, electron reflective coating on its electron gun-facing surface to minimize the effects of overall mask doming and blister warpage. The coating comprises a compound selected from the group consisting of bismuth (tri)oxide-potassium silicate and tungsten-potassium silicate. The method of making the coating comprises forming an aqueous suspension of the compound and spraying a plurality of layers of the compound onto the electron gun-facing surface of the mask.

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