Coating processes – Electrical product produced – Integrated circuit – printed circuit – or circuit board
Patent
1978-07-14
1982-02-09
Crane, Daniel C.
Coating processes
Electrical product produced
Integrated circuit, printed circuit, or circuit board
228 20, 228 40, 427273, 427377, 427314, 134107, 118 72, B23K 108, B05D 512
Patent
active
043150420
ABSTRACT:
The method of solder leveling comprising maintaining a zone of hot saturated inert vapor at substantially the temperature of molten solder above a molten bath of solder, moving the part to be treated through the vapor at a rate such that it will become uniformly heated to substantially the temperature of the molten solder prior to immersion therein, immersing the part in the molten solder, withdrawing the part from the molten solder through the saturated vapor to the ambient atmosphere and, while withdrawing the part, projecting streams of hot, high density fluid on the surfaces of the part in directions opposite to the direction of withdrawal to sweep the surfaces of the excess solder.
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patent: 4077467 (1978-03-01), Spigarelli
patent: 4115601 (1978-09-01), Ammann et al.
Crane Daniel C.
Hybrid Technology Corporation
O'Connell Robert F.
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