Hi Scott - I just presented some immersion tin and immersion silver test data at
the APEX conference. Take a look at the paper titled "An Investigation of the
Effects of Printed Wiring Board Surface Finish and Conformal Coating For Ball
Grid Array Assembly" in the conference proceedings - it may be useful data
depending on your use environments.

Dave Hillman
Rockwell Collins
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Scott Stewart <[log in to unmask]> on 03/29/2000 01:16:59 PM

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Subject:  [TN] White Tin



     Hi All,
     Does anyone have information on White Tin as an alternative finish to
     HASL, OSP's, Ni/Au?  How are the ionics?  What Chemical Suppliers
     would you recommend for White Tin?

     Regards,

     Scott

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