Greetings! I have a customer who has asked for information regarding the MTBF (Mean Time Before Failure) of bare pcbs. I am wondering if there is any 'standard' information for FR4 boards. Can anyone point me in the right direction?? Thank you. Isaac Stringer VP - Vector Fabrication Inc Milpitas, CA [log in to unmask] ############################################################## TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c ############################################################## To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TECHNET <your full name> To unsubscribe: SIGNOFF TECHNET ############################################################## Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information. If you need assistance - contact Gayatri Sardeshpande at [log in to unmask] or 847-509-9700 ext.5365 ##############################################################