Hi! 150 mounted boards wait to be wave soldered. 50 siblings with the same date code already passed the process,but 15% showed delamination. The visual examination showed a lack of healthy black colour on the inner layer conductors,very different from the state of younger relatives from the same vendor. Age: 4 months. Number of layers:10 Prebake:none Previous vendor history:good What's the verdict for the survivers after soldering? What should be done with the mounted boards? Excuse please my nonscientific letter,and try to help! Thank you, Gaby ################################################################ TechNet E-Mail Forum 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://jefry.ipc.org/forum.htm) for additional information. For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311 ################################################################