Hi Neil - before you go down that road, I recommend you determine the root 
cause of the dendritic growth. You may be able to eliminate the issue with 
other methods than tenting the vias which may be more advantageous or 
lower cost.  Tenting the vias could make the situation worst depending on 
what is causing their initiation and growth. Good Luck.

Dave Hillman
Rockwell Collins
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Neil Atkinson <[log in to unmask]> 
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07/04/2012 11:02 AM
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[TN] Copper Dendrites






 

 What is the view of covering vias with solder resist to prevent dendrite 
growth?

This is an FR4 PCB with OSP finish, SMT reflow both sides and a few 
through hole components soldered with a selective soldering process...

Thanks in anticipation of the help of the Technet!

Neil


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