I stand corrected. I dug out my notes and we were using 6 mils as a criteria (spec from Motorola). But were getting measurements as high as 8-10 mils. That spec may be at 8 now, I developed the BGA process at my previous employer, but have not worked with BGA in the last year as my new employer is not using BGA currently. Brad Kendall ############################################################## 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. For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311 ##############################################################