Alloy-enriched solder cream

Details Alloy-enriched solder cream Alloy-enriched solder cream

1986-07-25

1987-04-28

Rosenberg, Peter D.

Metal treatment

Compositions

Fluxing

148 26, B23K 3524

Patent

active

046611738

ABSTRACT:
A soldering composition containing at least 85% and less than 90% by weight of finely divided solder metal and a minor portion of a vehicle for the solder metal, consisting essentially of a rosin-type flux, a thickening agent and a minor portion, about 2 to about 7%, of a fluorinated tertiary alkylamine, particularly a perfluorotrihexyl amine. During vapor-phase soldering, the amine component is washed from the solder composition, leaving solder metal, rosin-type flux and thickening agent, in the remaining composition, the composition at this stage containing about 90% solder metal, and yielding dense solder joints, essentially no solder balls, and minimal residue.

REFERENCES:
patent: 3684533 (1972-08-01), Conwicke
patent: 3712550 (1975-10-01), Bolte

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