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

1980-09-08

1982-05-25

Hoffman, James R.

Radiation imagery chemistry: process, composition, or product th

Producing cathode-ray tube or element thereof

Using specified radiation-sensitive composition other than a...

430 25, 430 26, 427 531, 427 68, G03C 500

Patent

active

043317529

ABSTRACT:
In a method of forming a fluorescent screen of a color picture tube by a dry process, the method comprises a first step of precoating an emulsion containing a powder of acryl resin on an inner surface of a face plate of the color picture tube to form a primary coating, a second step of coating on the primary coating a photosensitive composition consisting essentially of a diazonium salt to form a thin film, a third step of exposing to light a selected portion of the thin film to render the same to become adhesive, a fourth step of depositing a powder of a phosphor on the selected portion to form a phosphor layer of a first color and a fifth step of repeating the third and fourth steps to form phosphor layers of second and third colors.

REFERENCES:
patent: 4247612 (1981-01-01), Nishizawa et al.
patent: 4269918 (1981-05-01), Nonogaki et al.
patent: 4273842 (1981-06-01), Nonogaki et al.

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