Back to results
US 9,536,729 B2Granted
Tubular light source having overwind
AssigneeApplied Materials, Inc.
InventorJoseph M. Ranish
Life of this patent
Estimating the term…
Abstract
Embodiments of the present invention generally relate to a tubular lamp with a coiled filament having an overwind wrapped around the coil. In one embodiment, the tubular lamp has a coiled coil filament, and the coiled coil has an overwind wrapped around the coiled coil.
Claims16
A lamp, comprising:
- an envelope having a first end and a second end;
- and
- a filament extending from the first end to the second end of the envelope, wherein the filament includes a primary coil and an overwind wrapped around the primary coil, and wherein the overwind has a pitch ratio between about 1.1 and about 2.0.
A halogen lamp for a rapid thermal processing (RTP) apparatus, comprising:
- a torroidal envelope;
- and
- a continuous filament disposed in the envelope, wherein the filament conforms to the shape of the envelope, and wherein the filament includes a primary coil and an overwind wrapped around the primary coil, and wherein the overwind has a pitch ratio between about 1.1 and about 2.0.
Dependencies are inferred from the claim text.