Electric heating – Metal heating – By arc
Patent
1992-04-02
1994-04-26
Albritton, C. L.
Electric heating
Metal heating
By arc
B23K 2600
Patent
active
053068912
ABSTRACT:
A metal sheet is attached to a ceramic substrate utilizing a weld pad formed of tungsten layer that is preformed onto the substrate and features a faying surface coated with a gold film. The sheet is superposed onto the gold film and scanned with a laser beam to fuse the sheet and the gold, without fusing the tungsten, thereby avoiding spalling of the metal and microcracking of the ceramic.
REFERENCES:
patent: H158 (1986-11-01), Frausto
patent: 4697061 (1987-09-01), Spater et al.
patent: 4782209 (1988-11-01), Caers et al.
patent: 5023993 (1991-06-01), Fengelly
patent: 5111277 (1992-05-01), Medeiros, III et al.
patent: 5164566 (1992-11-01), Spletter et al.
Berry Celia A.
Fleming Michael P.
Shisler Robert W.
Albritton C. L.
Fekete Douglas D.
Motorola Inc.
Sarli Anthony J.
Southard Donald B.
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