Hi Werner,
I'm not that sure of that. For some "strange" reasons, those voids are occasionally reported ONLY on the OSP type of finish. Their formation is not consistent, which implies that something else, not just diffusion is involved and that "something" is probably of much more importance than diffusion.
Regards,
Vladimir
Vladimir Igoshev, Ph. D.
Senior Materials Researcher
Research in Motion
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-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Werner Engelmaier
Sent: Tuesday, July 19, 2005 12:03 PM
To: [log in to unmask]
Subject: Re: [TN] BGA voids
Hi Vladimir,
The pics I have of this, would lead one in the direction of differences in
the diffusion rates---but proof....?
Werner
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