Barrier coatings and methods in discharge lamps
US7057335B2 · kind B2 · utility
2Cited by
10References
69Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 10, 2003 |
| Grant date | Jun 6, 2006 |
| Priority date | — |
| Expiry date | Nov 10, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J61/35
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention includes barrier coatings and methods for reducing or preventing chemical reaction between the discharge medium and arc tube wall material in discharge lamps. The barrier coatings comprise nitride layer exposed to the discharge medium formed from one or more of aluminum, boron, scandium, yttrium, or the lanthanides. In another aspect, the present invention includes methods of forming coatings on the inner wall of arc tubes by introducing two or more precursors into the arc tube chamber and pyrolitically reacting the precursors to form layers for the coating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.