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Date: | Fri, 14 Jul 1995 13:10:48 -0400 |
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Rory,
I would say that, no, it is not possible to get electromigration in an
unbiased test. For electromigration to occur you need three elements: an
electrical potential, water, and a conductive contaminant. Electrochemical
migration occurs when this conductive contaminant mixes with water (only a
few monolayers needed). I would guess that you have a flux contamination
problem and the lead is re-deposited rather than migrated.
Doug Pauls
Contamination Studies Laboratories
317-457-8095
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