Solder removal technique

Coating processes – Electrical product produced – Integrated circuit – printed circuit – or circuit board

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Details

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: 3865298 (1975-02-01), Allen et al.
patent: 3866307 (1975-02-01), Pfahl, Jr. et al.
patent: 3904102 (1975-09-01), Chu et al.
patent: 4077467 (1978-03-01), Spigarelli
patent: 4115601 (1978-09-01), Ammann et al.

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