If we are using no-clean, is there any danger of leaving all vias exposed? I know there has been a lot of discussion about tenting one side or the other (or both) or plugging, or encroaching up to the hole size, but not much about opening everything up. Am I venturing into dangerous territory? The only downside I can think of (as a designer) is having to move the vias out away from the pads to get a little more mask between them. Jack --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 -----------------------------------------------------