Did the lot of boards go through typical GroupA type tests -
thermal stress such as in IPC-RB-276 ?

You can have electrical continuity, but not have 100% 
adhesion to the barrel.  You can have electrical continuity,
but have poor adhesion between electroless and inner layer
or electrolytic and electroless - as well as the possibility of
having the electroless crack as a result of the soldering operation

Did you perform microsections of holes that had not seen
soldering operations to see what they looked like before the
assembly?

Susan Mansilla
Robisan Lab
317-353-6249

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