Thermal radiant source with filament encapsulated in protective

Details Thermal radiant source with filament encapsulated in protective Thermal radiant source with filament encapsulated in protective

1995-06-23

1997-07-01

Jeffery, John A.

Electric resistance heating devices

Heating devices

Radiant heater

219553, 219544, 338308, 338262, 313578, 313522, 356352, H01K 700

Patent

active

056446764

ABSTRACT:
An electrically modulatable radiant source includes an essentially planar substrate, a well or hole formed in the substrate, and at least one incandescent filament attached to the substrate. The incandescent filament is aligned with the well or hole and is formed of a metallic compound which readily oxidizes at an operating temperature of the incandescent filament. An oxidation resistant film encapsulates the incandescent filament to prevent the filament from oxidizing. Furthermore, contact pads are formed on the substrate at both ends of the incandescent filament for feeding electric current to the incandescent filament.

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Laser Focus World, vol. 28, No. 12, Dec. 1, 1992, pp. 26, 28, 31, "Hot-filament microlamps now feasible," Eugene D. Jungbluth.
Bross, et al, "Modular Resistor Array", IBM Tech. Disclosure, vol. 13, No. 5, Oct. 1970.

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