Electric heating – Metal heating – By arc
Patent
1991-09-03
1992-10-27
Evans, Geoffrey S.
Electric heating
Metal heating
By arc
219 8512, 21912164, B23K 2600
Patent
active
051591715
ABSTRACT:
A method for solder deposition by the use of a laser (24), comprises the steps of applying a predetermined thickness of solder (6) to a substrate (2) including over a printed circuitry pattern (4) on the substrate, laser printing (24) to a reflow temperature the solder on the printed circuitry pattern, leaving an un-reflowed portion (9) and then removing (26) the un-reflowed portion of the substrate, leaving solidified solder (7) on the printed circuitry pattern of the substrate. Additionally, if desired, a part (12) having solder pads (14) can be placed on the solder (7) after tack media (13) is placed on the solder. Then the part (12) and substrate can be reflowed in an oven (34).
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Cheraso John P.
Cook Kenneth E.
Hertz Allen D.
Tribbey David A.
Evans Geoffrey S.
Meles Pablo
Motorola Inc.
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