Kirkendall voids are voids that develop as two metals diffuse into each
other and the term is predominently used to describe wire bond failure
mechanisms.

Check out:

 http://www.eccb.org/pbps/tg/wirebond.htm

ain't technology wonderful???

Dave Rooke
Circo Craft - Pointe Claire
_________________________

>I've been stumped by a phrase which one of our Japanese customers used in a
>correspondence with us recently.  The phrase is "Kirkendall void" and the
>context it was used in is:
>
>"There are some electrode that are gold plated and also solder welded.  If
>there is gold at solder welded part, Kirkendall void may be formedm
>resulting pealing."
>
>
>It is possible that the CCA they were looking at has gold plated leads
>installed on gold plated PWBs and reflowed with Sn63Pb37 solderpaste.
>
>Any help would be gratefully accepted,
>
>
>Regards,
>
>
>Phillip A. Bavaro
>Senior Manufacturing Engineer
>[log in to unmask]
>(619) 658-2542
>
>
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