Season's Greets,

A query (actually re-query) to those in the know on the usage of plastic
microcircuits instead of ceramics.

I have some component guys who have ruled that plastic parts can only be
assembled on a no-clean flux line.  Anyone using a rosin (RMA) flux is
dis-qualified from assembling for us.  I know the theory is that the
microcracks formed at reflow temperatures will entrap corrosive residues,
but I have trouble buying the NO-CLEAN GOOD, ROSIN-BAD generalization.

Opinions?

Ralph Vaughan
Boeing-Atlanta

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