Dual filament lamp for rapid temperature processing
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United States of America Patent
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Apr 26, 2011
Grant Date -
Jun 3, 2010
app pub date -
Dec 2, 2008
filing date -
Dec 2, 2008
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A lamp (10), which can be used in rapid thermal processing (RTP), has a lamp envelope (12) arrayed along a longitudinal axis (14) and has a top (16) and a bottom (18). A first coiled-coil filament (20) having a first lead-in (20a) and a second coiled-coil filament (22) having a second lead-in (22a), are parallelly arrayed to each other and to the longitudinal axis (14) within the envelope (12). A serial connector (24) joins the first and second filaments; and an electrically insulating support (26) is positioned near the bottom (18) of the lamp envelope (12). The first lead-in (20a), the second lead-in (22a) and at least a portion (24a) of the serial connector (24) are sealed within the insulating support 26 whereby the first and second lead-ins (20a, 22a) and the at least a portion (24a) of the serial connector (24) provide the only support for the first and second filaments (20, 22). In a preferred embodiment, the first and second filaments (20, 22) have a wire diameter twice the diameter of a nominal CC6 filament.
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