Radiation imagery chemistry: process – composition – or product th – Producing cathode-ray tube or element thereof – With light-absorbing matrix on faceplate
Patent
1981-04-15
1986-02-25
Brammer, Jack P.
Radiation imagery chemistry: process, composition, or product th
Producing cathode-ray tube or element thereof
With light-absorbing matrix on faceplate
430 6, 430 23, 430326, G03C 500
Patent
active
045728801
ABSTRACT:
A fluorescent screen of a black matrix type color picture tube is manufactured by forming a graphite film on an inner surface of a face plate, applying a photoresist film on the graphite film, exposing to light portions of the photoresist film where phosphor picture elements are to be formed subsequently, removing the exposed portions of the photoresist film to expose portions of the graphite film, removing the exposed portions of the graphite film to form a black matrix film having voids corresponding to the exposed portions of the graphite film, and thereafter depositing triads of phosphors of picture elements on the inner surface of the face plate through the voids. In a modification, a reflective film is interposed between the graphite film and the photoresist film and portions of the reflective film in register with portions of the photoresist film exposed to light are removed by etching.
REFERENCES:
patent: 3558310 (1971-01-01), Mayaud
patent: 3615460 (1971-10-01), Lange et al.
patent: 3632339 (1972-01-01), Kham
patent: 3661580 (1972-05-01), Mayaud
patent: 3778266 (1973-12-01), Mizuno et al.
Brammer Jack P.
Hitachi , Ltd.
Pfund Charles E.
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