When I met him first time, I was 30 and he 60, and that was million years
ago, Werner. He left Ericsson many years ago. He "was" Ericsson's King of
Soldering and Metallurgy. Had one foot with Ericsson, the other bei FgH.
/Inge

-----Ursprungligt meddelande-----
Från: TechNet [mailto:[log in to unmask]] För Werner Engelmaier /*
Skickat: den 16 januari 2008 20:30
Till: [log in to unmask]
Ämne: Re: [TN] SV: [TN] Solderability of Tin-Gold Intermetallic

Hi Inge,
As usual people are well advised not to argue with a (this) Swede; 1) he 
usually knows what he is talking about, and 2) if not, he will drink you
under the 
table.
The IMCs formed by Sn/Pb, and Sn/Ag as well, are platellet-shaped crystals 
(in cross-section they may look like needles but are always plateletts), and
I 
have seen no evidence that they are solderable. Solderability simply depends
on 
how much Sn, or SnPb, to which you wet, is present. So the amount of these 
IMCs affect both solderability as well as Au/Ag-embrittlement.
Inge, how is Gerd? I sure have not heard anything about him for some time.



Werner



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