Processing and protecting a foil shadow mask for a tension mask color cathode ray tube
US5139451A · kind A · utility
0Cited by
8References
28Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 31, 1990 |
| Grant date | Aug 18, 1992 |
| Priority date | — |
| Expiry date | Dec 31, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2229/0722
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A component-in-process comprises an ultra-thin foil shadow mask having on at least one side thereof a lamina having a composition and thickness effective to physically support and protect the mask during subsequent processing operations. Such operations include forming apertures in a foil mask blank mounted on a lamina, electroforming a foil mask on a lamina, and etching a mask mounted on a lamina to reduce overall thickness or selectively thin it.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.