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US 4,284,694 AGranted
Method for improving the adherence of a phosphor-photobinder layer to a glass support
AssigneeRCA Corporation
InventorStanley A. Harper
Life of this patent
Estimating the term…
Abstract
A layer of an aqueous solution containing polyvinyl alcohol and a zirconyl compound is applied to a clean glass surface and dried to produce a precoating thereon. A subsequently-applied phosphor-photobinder coating thereon is exposed to a light image and then developed with a turbulent aqueous liquid. The phosphor-photobinder coating exhibits improved adherence to the surface during the developing step due to the presence of the precoating.
Claims10
A method for preparing a luminescent screen upon a glass surface comprising
- (a) depositing on said glass surface a layer of an aqueous solution containing polyvinyl alcohol and a water-soluble zirconyl compound,
- (b) drying said layer to produce a precoating on said surface,
- (c) depositing upon said precoating a coating comprising phosphor particles and a photosensitive binder therefor,
- (d) exposing said coating to a light image whereby to form in said coating selected regions of greater solubility and selected regions of lesser solubility,
- (e) and then developing said exposed coating by selectively removing said regions of greater solubility.
2 more elements
A method for preparing a luminescent screen upon a glass surface comprising
- (a) applying to said glass surface a layer of an aqueous solution containing about 0.01 to 0.50 weight percent of polyvinyl alcohol and about 0.001 to 0.10 weight percent of a water-soluble zirconyl compound,
- (b) drying said layer to produce a dry, nonphotosensitive precoating adhered to said glass surface,
- (c) depositing on said precoating a layer of a slurry comprising phosphor particles, polyvinyl alcohol, and a photosensitizer therefor,
- (d) drying said slurry layer to produce a dry, photosensitize coating on said precoating,
- (e) exposing said coating to a light image to produce selected regions of greater solubility and selected regions of lesser solubility in said coating,
- (f) and then developing said coating by applying thereto a turbulent quantity of aqueous liquid to selectively remove said regions of greater solubility.
3 more elements
Dependencies are inferred from the claim text.