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Wed, 27 Oct 2010 13:11:40 +0200 |
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Gunther,
I'll send a picture offline to you for discussion. It sounds to me as if you
have got exactly same problem as I had many years ago.
/ Inge
----- Original Message -----
From: "Grossmann, Guenter" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Wednesday, October 27, 2010 9:36 AM
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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