This subject brings back bad memories to me.... A while back (long time) every board I purchased had "mouse bites" the explanation is something like swiss cheese type circles partialy thru a circuit trace. The ones we had only went about 10% into the trace & only partially thru the thickness of the trace. I cannot draw a picture, but the long and the short of it were bubbles in the agitation system of the pattern plate line causing them. The total reduction in circuit length and width was not enough to reject, but I still didn't like it. The vendor causing it controlled his bath better and the problem went away. I had good micro photos of the condition but long dumped. ############################################################## 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 ##############################################################