If there are any designers out there, perhaps you can help me with a question. My question(s) is: how do you calculate the current carrying capacity of a via? I have calculated the area of a 6 mil via and a 4 mil trace to the via and the area of the via is about 100x that of the trace. But, how do you calculate this with respect to a power layer? Any help is greatly appreciated. Thank you Jana Carraway Maxtek Components Corporation Beaverton, Oregon ############################################################## 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 ##############################################################