Fellow TechNetters:
Are all LF solder fluxes created equal? I often see m/b with more flux residue, dry-crusty-yellowish, accumulated around the solder joint. Yet others are almost free of flux residue. I do see that either solder form a glassy halo around the solder joint at the solder mask surface. What are the Pros & Cons. The solder flux residue is more pronounced on Filed return assemblies or those which have been subject to reliability testing, HALT, HASS, S&V & T/C
Victor,
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