Method of forming fluorescent screens of color picture tubes

Details Method of forming fluorescent screens of color picture tubes Method of forming fluorescent screens of color picture tubes

1979-09-24

1981-04-21

Louie, Jr., Won H.

Radiation imagery chemistry: process, composition, or product th

Producing cathode-ray tube or element thereof

With light-absorbing matrix on faceplate

430 29, G03C 500

Patent

active

042633842

ABSTRACT:
A photosensitive film applied onto the inner surface of a faceplate of color picture tube is exposed to light through a shadow mask. The exposed portions of the photosensitive film are further hardened by the photo-cross linking property until they exhibit hydrophobic property. Since these further hardened portions repel a light absorbing material, for example graphite, the graphite adheres to only the portions of the faceplate between the exposed portions. The surplus light absorbing material deposited on the further hardened portions is removed by development, whereby a black matrix surface can be obtained having a pattern of the light absorbing material adhered to the faceplate.

REFERENCES:
patent: 1212446 (1917-01-01), Boularan et al.
patent: 2310223 (1943-02-01), Eaton et al.
patent: 2532390 (1950-12-01), Bennett et al.
patent: 3317319 (1967-05-01), Mayaud
patent: 3558310 (1971-01-01), Mayaud
patent: 3632339 (1972-01-01), Khan
patent: 3753711 (1973-08-01), Kobayashi et al.

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