Antireflective coating layer in particular for a cathode ray tub

Details Antireflective coating layer in particular for a cathode ray tub Antireflective coating layer in particular for a cathode ray tub

1991-08-27

1993-10-19

O'Shea, Sandra L.

Electric lamp and discharge devices

Cathode ray tube

Envelope

313478, 359609, 359614, H01J 2928, G02B 110

Patent

active

052549046

ABSTRACT:
An antireflective coating layer 22 is applied to a substrate 20, the coating layer having a refractive index gradient such that the refractive index decreases in the direction from the substrate surface 24 to the outside surface 26 of the coating layer. An organic solution of an alkoxide starting material is provided on the substrate and is converted into a gel in situ by means of a reaction with water, which gel is subsequently dried. During the formation of the gel the reaction conditions are varied in such a manner that a non-porous gel is formed in which the degree of crosslinking of the gel material increases in the direction from the substrate surface to the outside surface of the coating layer.

REFERENCES:
patent: 2734142 (1956-02-01), Barnes
patent: 4753516 (1988-06-01), Doi et al.
patent: 4830879 (1989-05-01), Debsikdar
patent: 5045751 (1991-03-01), Numata et al.

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