Cathode ray tube

Details Cathode ray tube Cathode ray tube

1991-07-03

1994-07-05

Bell, Janyce

Coating processes

Electrical product produced

Fluorescent or phosphorescent base coating

4273897, 427404, 4274072, B05D 506

Patent

active

053265882

ABSTRACT:
A method for manufacturing a screen of a color cathode ray tube, comprising the steps of: (a) coating an adhesion strengthening layer over the inner surfaces of a panel and a panel skirt; (b) coating black matrix stripes and fluorescent stripes on the adhesion strengthening layer in the panel; (c) coating a pyrolysis mitigating layer on said adhesion strengthening layer within the panel skirt; (d) coating an organic film on the black matrix and fluorescent stripes; and (e) coating a thin metal film on the resultant structure. The pyrolysis of the poly vinyl alcohol is delayed during baking by the acryl emulsion contained in the pyrolysis mitigating layer. This process prevents swelling up and peeling off of the thin metal film during the baking step, and reduces inferior products that result from the peeling off of pieces of the metal layer.

REFERENCES:
patent: 3940508 (1976-02-01), Wilcox
patent: 4293586 (1981-10-01), Unnai
patent: 4339475 (1982-07-01), Hinosugi et al.
patent: 4990366 (1991-02-01), Pozzolo et al.

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