Phosphor only etching process for TFEL panel having multiple-colored display
US4894116A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 13, 1989 |
| Grant date | Jan 16, 1990 |
| Priority date | — |
| Expiry date | Jan 13, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B33/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A process for manufacturing a TFEL panel having a plurality of side-by-side phosphor stripes of different colors includes the steps of placing a thin film phosphor layer of a first color producing phosphor on top of transparent electrodes covered by an insulator and subjecting the phosphor to an etching process to leave thin elongate stripes. A second phosphor layer is deposited over the first phosphor stripes and the etch is repeated to leave adjacent stripes of a second color-producing phosphor. An insulating layer and a second set of electrodes are placed atop the stripes to complete the panel which is supported on a glass substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.