Aluminum oxide and aluminum oxynitride layers for use with phosphors for electroluminescent displays
US7812522B2 · kind B2 · utility
0Cited by
21References
37Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 19, 2005 |
| Grant date | Oct 12, 2010 |
| Priority date | — |
| Expiry date | Jul 19, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B33/22
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A novel laminate is provided to improve the operating stability of thioaluminate based phosphors used in ac thick film dielectric electroluminescent displays. The novel structure comprises a rare earth activated alkaline earth thioaluminate phosphor thin film layer and an aluminum oxide or aluminum oxynitride layer provided directly adjacent and in contact with the bottom of the phosphor thin film layer. The invention is particularly applicable to phosphors used in electroluminescent displays that employ thick dielectric layers subject to high processing temperatures to form and activate the phosphor films.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.