Barbara,
What is the application, board type, component types, etc?
Immersion silver is my personal favorite, but that is completely irrelevant.
You should choose a board finish dependent upon the application of the CCA, whether it has fine-pitch array components, including CSPs, whether it is double-sided with PTH parts or hand-soldered components, the environment the CCA will be used in, the flux type to be used, the alloy that is required, and several other factors that go into the decision. Without complete knowledge of all these factors, it is hard for anyone to answer that question. I can tell you that IAg beats ENIG in cost, but each finish has strengths and weaknesses. Some definitely have more or less than others.
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Barbara Burcham
Sent: Wednesday, June 01, 2011 8:17 PM
To: [log in to unmask]
Subject: [TN] Best Board Finish - beyond gold
Hey Y'all,
I am looking for a reliable bare board finish that beats the cost of gold.
What experience is out there?
What would you recommend?
Thanks,
Barbara Burcham
pcb Trace Design
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