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Date: | Wed, 05 Jun 96 18:36:00 DST |
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After cleaning (soap & water) soldered assemblies, has anyone had a
white residue problem that was traced back to the laser etched characters on
plastic DIP's?
We currently have a white residue problem under investigation where the
initial evidence indicates the source to be a certain brand of DIP IC. The
top of the DIP has laser etched character markings that appear to leach a
chemical component(s) that combines with the rinse (tap) water to form a
white residue after drying. The residue is easily removed with a cotton
swab and alcohol.
At this point the complaint is only visual and easily corrected by
hand cleaning but the concerns are what is actually being deposited on the
board surface and is it being completely removed.
Any inputs on this will be greatly appreciated.
Norm Dill
Harris RF Communications
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