JPS54129875A - Manufacture for fluorescent screen for color receiving tube - Google Patents

Abstract

PURPOSE: To prevent scaling of fluorescent stripes and to obtain excellent picture, by coating the photosensitive agent and sensitizer on the inner surface of the face plate before the coating of fluorescent substance slurry.

CONSTITUTION: On the inner surface 4a of the face plate 4, first the photosensitive agent or sensitizer are uniformly coated and dried to form the layer 12, and after that, the fluorescent film 3 is formed and exposed by injecting fluorescent substance slurry, e.g. green. In this case, the light 2 through the hole 1a of the shadow mask 1 is absorbed in the fluorescent film 3 and light amount is less exponentially. But, by the layer 12 of the photosensitive agent or sensitizer for the plate inside surface 4a, the sensitivity at the fluorescent film near the inside surface 4a is increased. Photo sensitivity is sufficient even with less light and bonding force can be increased. The similar works are repeated for the remaining two colors blue and red. In either case, the exposure time to increase the bonding force is not required to take longer exposure time, and no fear in mixture with the adjacent color is made.

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