The
only "spots" I see are on the innerlayer copper, beneath layers of plated
copper, is this the problem?
If
so, it is highly unlikely to have anything to do with the glass fibers.
Glass voiding would be on the laminate surface, there should be no glass on top
of the copper. I do not see any glass voiding in the cross-sections.
Have you done any backlights?
When
Susan asked about post-plasma cleanup, she may have been referring to the
traditional O2 burn at the end of the plasma cycle? Was this done?
(I also agree that these parts saw a LOT of etchback, not common with
plasma. And plasma does not touch the glass - that would normally be
etched or frosted in a follow-up wet process.) Plasma without proper
cleanup can leave a surface that does not always plate easily or have good
adhesion.
Patty
Patricia J. Goldman
PPG Industries, Inc.
724-274-3417
[log in to unmask]
Mornin' All!
Just wanted to let you all know my page is back up now, and I've got
some more pictures up that Randy would like you to take a look at. Go to:
http://www.stevezeva.homestead.com
and look at 276-1.jpg -
276-1-5.jpg.
-Steve Gregory-
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