Electrically modulatable thermal radiant source and method for manufacturing the same
US5500569A · kind A · utility
47Cited by
8References
13Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Mar 31, 1994 |
| Grant date | Mar 19, 1996 |
| Priority date | — |
| Expiry date | Mar 31, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01K7/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A radiant source including an essentially planar substrate having a well or hole formed therein. At least one incandescent filament is mounted to the substrate and aligned at the well or hole. Contact pads are formed onto the substrate, to both ends of the incandescent filament, and feed electric current to the incandescent filament. Furthermore, each incandescent filament is doped with phosphorus to an impurity concentration of at least 5.times.10.sup.19 atoms/cm.sup.3.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.