Method for making a tantala/silica interference filter on the surface of a tungsten-halogen incandescent lamp
US5658612A · kind A · utility
11Cited by
10References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 29, 1995 |
| Grant date | Aug 19, 1997 |
| Priority date | — |
| Expiry date | Sep 29, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J9/20
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method for making a tantala/silica interference filter on the surface of a tungsten-halogen incandescent lamp having molybdenum leads includes depositing on the lamp surface by low pressure chemical vapor deposition the interference filter comprising alternating layers of tantala and silica. Thereafter, the filter is heat treated in an atmosphere of humidified inert gas containing less than 1% oxygen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.