Tom, The boards should not be a concern simply because of their age. I have worked with boards that were not solderable after 2 months and I have boards that were 12 years old and soldered very well. In my opinion, the quality of the plating processes and the purity of the metals used have a major role in a board's shelf life. If you are still concerned about reliability, have some cross sections done as Dave suggests. If you are dealing with a quality shop there should not be a problem. It would be interesting to know why they went to the trouble of doing a second reflow. Norm Dill ---------- From: [log in to unmask] To: [log in to unmask] Subject: PCB board age Date: Monday, September 16, 1996 6:43PM We stuff and solder (both wave and hand) small runs of PCBs (primarily PTH components. Our boare board requirements include individual packaging and boards no older than 6 months. A supplier recently shipped us boards that were re-reflowed 9 months after their original fabrication. Is this acceptable within A-610 for hi-rel commercial applications? Thanks. Tom Moore Electro Plasma Tom Moore *************************************************************************** * 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. * ***************************************************************************