US 5,346,721 AGranted

Method for coating CRT face panels

AssigneeZenith Electronics Corporation

InventorsHua-Sou Tong, Gregory Prando

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Abstract

The present invention is directed to a cathode ray tube having a surface with reduced reflectivity and electrical resistivity and to a method for providing such reduced reflectivity and electrical resistivity. In the method of the invention, a solution of a soluble metallic cation moiety and a silane in an organic solvent is provided. The solution is applied to the surface of a cathode ray tube to provide a coating of the silane and the metallic moiety of the metallic compound on the surface. Thereafter, the cathode ray tube is cured at an elevated temperature for a period of time sufficient to convert the metallic cation moiety to a metal oxide in situ and to provide a metallic oxide in a matrix of siloxane.

Claims19

Dependent claims

A method for reducing both the reflectivity and the electrical resistivity of the surface of a cathode ray tube comprising:

(a) providing an ionic solution consisting essentially of a dissociated metallic compound having a metallic cation moiety selected from the group consisting of tin, palladium, platinum, silver and antimony and a silane in an organic solvent,
(b) applying said solution on the surface of a cathode ray tube to provide a coating of said silane and said metallic cation moiety on said surface, and
(c) curing said cathode ray tube at an elevated temperature of from about 120.degree. C. to about 200.degree. C. for a period of from about 0.1 hour to about 2 hours to convert said metallic cation moiety to a metal oxide in situ and to provide a transparent coating of an oxide of said metallic moiety dispersed in a matrix of siloxane on the surface of said cathode ray tube.

Dependencies are inferred from the claim text.

Facts

Application: 07/882,205Filed 13 May 1992 · continuation in part
Priority: 28 Dec 1989
Granted: 13 Sep 1994
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

C03C 17/009
Comprising a mixture of materials covered by two or more of the groups C03C17/02, C03C17/06, C03C17/22 and C03C17/28: mixtures of organic and…
H01J 9/20
Apparatus or processes specially adapted for the manufacture , installation, removal, maintenance of electric discharge tubes, discharge lamps,…
H01J 29/896
Optical or photographic arrangements structurally combined or co-operating with the vessel: anti-reflection means, e.g. eliminating glare due to…
C03C
Chemical composition of glasses, glazes or vitreous enamels

Family

Serial458,127Parent of this continuation-in-part · filed 28 Dec 1989
US 5,346,721 AThis patent

From the US filing history. Foreign family members aren’t listed.

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