Your problem is likely not the Pd-Ag surface layers, but the underlying metal
to which you need to wet.  Either that base metal is contaminated and thus
poorly wettable or it may be made of a material, e.g. Alloy 42 (check with
magnet), that is inherently difficult to wet. 

Werner Engelmaier
Engelmaier Associates, Inc.
Electronic Packaging, Interconnection and Reliability Consulting
23 Gunther Street
Mendham, NJ  07945  USA
Phone & Fax: 201-543-2747
E-mail: [log in to unmask]

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