Jack,

By the shape of object on the trace, it looks like a foreign material got into the etching process.

Michael

-----Original Message-----
From: DesignerCouncil [mailto:[log in to unmask]]On Behalf Of Jack Olson
Sent: Thursday, February 07, 2008 9:33 AM
To: [log in to unmask]
Subject: [DC] FAB: Thin Trace Failures

Has anyone ever seen a cross-section like this?

http://www.frontdoor.biz/PCBportal/opentrace.jpg

(ignore the words on the pic, just a guess)

Can you point me in the right direction for cause?

thanks,
Jack

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