Method of making viewing-screen structure for a cathode-ray tube
US4025661A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 13, 1972 |
| Grant date | May 24, 1977 |
| Priority date | — |
| Expiry date | Nov 13, 1992 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J29/28
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.