Hi Franklin! Do you have any photos which Steve could post on his website?
Photos would be very helpful.

Dave Hillman
Rockwell Collins
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Franklin D Asbell <[log in to unmask]>@ipc.org> on 03/14/2002
07:23:11 AM

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       to Franklin D Asbell <[log in to unmask]>

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Subject:    [TN] Unusual plated 'stuff' on copper surface



This past January we began seeing unusual 'growths'  ((for lack of better
descriptive wording)) on the surface of panels after copper  II, they are
typically observed on one end of the panels, often only a couple  panels
per tankload exhibit this.

These 'growths' look like fine strands of metal of  fabric fibers, they are
clustered together like someone poor shavings there, and  plated over them.
If any of you recall pics of those bacteria found in that Mars  asteroid
from the Antarctic, they appear similar to that (not saying we have
bacteria growing in our baths of course). Occasionally we see this out
towards  the center of panels, I don't believe we have ever seen all panels
in a tankload  exhibit this either. This condition is observed on one or
two loads per day (out  of about 20 - 30), some days not at all.

We started seeing this in one bath (of three in  house) until recently it
appeared in another bath simultaneously.

Any help on this would be greatly appreciated as  our process engineers,
lab techs, and suppliers are baffled.

Thanks,

Franklin D Asbell
Network Circuits, Inc.
Irving, Texas 75061



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