Dear Sir, I would like to know are there any IPC standards which spelled the minimum requirements of a solder pad able to withstand numerous of soldering and de-soldering reworks before pad lifting? I have tested on some different material brand boards with same pad size and same finishing under the same soldering and de-soldering conditions, some brands material boards can withstand up to 18 cycles but some only 16 cycles. Is there a minimum requirements indicated in any of the IPC standards which I can refer to? Hope to have your favourable advise. Thanks & Best Regards Patricia Lui Xuan Technologies. ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________