Radiation imagery chemistry: process – composition – or product th – Producing cathode-ray tube or element thereof – Using specific control or specific modification of exposure,...
Patent
1982-04-16
1987-07-21
Goodrow, John L.
Radiation imagery chemistry: process, composition, or product th
Producing cathode-ray tube or element thereof
Using specific control or specific modification of exposure,...
430 25, 430 28, 430 29, 430144, 430291, 430292, G03C 500
Patent
active
046818243
ABSTRACT:
A fluorescent screen of a color picture tube is manufactured by the steps of forming a film of substance which becomes sticky when exposed to light on an inner surface of a panel of the tube, exposing predetermined portion of the film through a shadow mask to render sticky the exposed portions, repeatedly applying powders of phosphors of respective colors onto the portions which became sticky so as to form phosphor picture elements of respective colors, exposing portions of the film other than the predetermined portions to render them sticky, and applying a powder of graphite to the portions other than the predetermined portions to form a black matrix film.
REFERENCES:
patent: 3365292 (1968-01-01), Fiore et al.
patent: 4273842 (1981-06-01), Nonogaki et al.
patent: 4324850 (1982-04-01), Tomita et al.
patent: 4505999 (1985-03-01), Bergamo et al.
Dees Jos,e G.
Goodrow John L.
Hitachi , Ltd.
Pfund Charles E.
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