Hi Guenter,

If you send the pictures to me I'll put them up on my web page then post the
link so everyone can see them.

Steve Gregory

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Grossmann, Guenter
Sent: Wednesday, October 27, 2010 3:37 AM
To: [log in to unmask]
Subject: [TN] Cracks in BGA solderjoints

Hi Technetters

I have an effect in BGA solder joints that I have never seen before.
In microsections and in FIB preparations I see cracks between the IMC and a
slightly darker region towards the Ni which I assume to be a P enriched zone
of the Ni. However, the cracks are somewhere in the width of the solder
joint and they are quite short running out to a row of pores that look
somehow like Kirkendall voids.
Is there still a possibility to place one or two pictures? Kim's IPC site
doesn't work.

Best regards

Günter 



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