WHAT???!!!???

I have never heard of this issue.  Haven't people being using plastic parts
before the no-clean era?  If the RMA fluxes were used, there was a water
wash or something to clean the parts because of the issues of long term
issues of the RMA flux on the board.

Where did your components guys get this idea, and do they have any basis,
research etc. to back them up on this claim?

Ed Holton
Hella Electronics





"Vaughan, Ralph H" <[log in to unmask]> on 12/16/98 02:35:14 PM

Please respond to "TechNet E-Mail Forum." <[log in to unmask]>; Please respond
      to "Vaughan, Ralph H" <[log in to unmask]>

To:   [log in to unmask]
cc:    (bcc: Ed Holton/Hella North America Inc.)
Subject:  [TN] plastic parts




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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