Rosin-free, low VOC, no-clean soldering flux and method using the same
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United States of America Patent
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Nov 5, 1996
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N/A
app pub date -
Sep 9, 1994
filing date -
Sep 9, 1994
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Abstract
A rosin-free, low VOC, no-clean soldering flux consists essentially of one or more halide-free carboxylic acid activators in an aggregate amount not exceeding about 8% by weight of the flux; one or more alkyl amines capable of forming amine salt of the one or more activators and in an aggregate amount not exceeding about 10% by weight of the flux; and water, with or without a surfactant. The flux is particularly useful in a method of producing soldered printed wiring assemblies with minimal residual ionic contamination, so that post-soldering cleaning of the assemblies is unnecessary.
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