We are seeing a condition that has seemed to become a problem in our
Manufacture of PCB's. We are seeing a film or slight amount of particulate
matter on some of our solder joints. It gives a dull appearance that
almost looks rough. The substance is dry, and can be brushed away with a
dry medium coarse brush. It seems to only adhere to low areas ie the
bottom of a fillet. If an excessive amount of solder is on the joint, the
joint appears shiny and smooth. We use an Aqueous cleaner (Electrovert)
and a Armakleen soap solution for cleaning. We change the soap once a week
and we only do a moderate to small volume business. Anyone have any ideas?
Bruce Stilmack
GDLS-TO Manufacturing Engineer
(850) 574-4773
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