Method of making viewing-screen structure for a cathode-ray tube

Details Method of making viewing-screen structure for a cathode-ray tube Method of making viewing-screen structure for a cathode-ray tube

1972-11-13

1977-05-24

Hoffman, James R.

Coating processes

Electrical product produced

Fluorescent or phosphorescent base coating

427 73, H01J 2907

Patent

active

040256618

ABSTRACT:
An aluminized luminescent viewing-screen structure for a cathode-ray tube includes a carbon particle layer in contact with the aluminum layer. The carbon-particle layer is substantially free from metal-ion-containing materials, particularly compounds of alkali and alkaline earth metals.
A viewing-screen structure comprising a light-reflective aluminum metal layer having a carbon-particle layer thereon may be made by: (a) depositing on the metal layer a coating of organic, volatilizable, film-forming material, (b) depositing on the coated metal layer an over-coating of carbon particles that is substantially free from substances which, when incinerated, produce metal-ion-containing residues and (c) then baking the screen and support in air at about 400.degree. to 450.degree. C to remove organic and volatile matter.

REFERENCES:
patent: 2597617 (1952-05-01), Campbell
patent: 2951773 (1960-09-01), Helle et al.
patent: 3392297 (1968-07-01), Schwartz
patent: 3475639 (1969-10-01), Driffort et al.
patent: 3703401 (1972-11-01), Deal et al.

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