Two heat sources for welding silicon

Details Two heat sources for welding silicon Two heat sources for welding silicon

2005-01-04

2005-01-04

Campbell, Thor (Department: 3742)

Electric heating

Metal heating

By arc

C219S121480, C219S121590, C228S232000

Reexamination Certificate

active

06838636

ABSTRACT:
A method of welding two silicon workpieces (20, 22) together into one member without the formation of cracks along the weld. A first method passes current (34, 36) through one or both of the workpieces to heat them to between 600 and 900° C. Then an electric, laser, or plasma welder (38, 40) passes along the seam (24) between the workpieces to weld them together. A second method passing current (34) through a plate (60), preferably formed of silicon, which either supports the workpieces or is brought into contact with at least one of them, whereby the workpieces are preheated prior to the welding operation.

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patent: 4302658 (1981-11-01), Beigay
patent: 5074456 (1991-12-01), Degner et al.
patent: 6403914 (2002-06-01), Zehavi et al.
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patent: 11111628 (1999-04-01), None
patent: 11179565 (1999-07-01), None
patent: WO 0063952 (2000-10-01), None

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