Technet, What is the general range of thickness that can be held with LPI mask.? Is it in the .0006 inch range or is it up around .001-.002 inch? If it is really in the .0006 area it could not possibly cover a .015 dia hole and another via plug or fill prior to solder mask would need to be done to fill these holes? We may have inadvertanly noted LPI to be .001-.002 thick and should have stated .002 MAX. TIA Bob Wolfe Executone Inter-Tel Business Information Systems Robert M. Wolfe Lead PCB Designer 478 Wheelers Farms Road Milford, CT 06460 Phone: 203-882-6405 Fax: 203-882-2727 Email: [log in to unmask] ############################################################## 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 ##############################################################