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 *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To unsubscribe from this list at any time, send a message to: * * [log in to unmask] with <subject: unsubscribe> and no text. * ***************************************************************************