One of our customers wants us to plug vias (.016-.020") with a conductive epoxy material. The board is finished with white tin so plugging with solder is out. The vias do not have to be completely filled but the plugs must be strong enough to withstand test probe pressure. The epoxy filled vias will be used as test points. We have used carbon and silver epoxy on conductive surfaces but never to plug holes. Has anyone ever done this and can you suggest a conductive epoxy that can be screened on? Hans Rohr ############################################################## 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 Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ##############################################################