Steve, We do this all the time. Our smallest vias at 1 mil and smaller at the exit side. Of course if you put more than .0002 plating in the holes some will close. Chuck Brummer 3M Manufacturing Engineer 8357 Canoga Ave. Canoga Park, CA 91304-2605 (818) 734-4930 From: Steve Kelly <[log in to unmask]> To: [log in to unmask] Date: 03/31/2010 12:24 PM Subject: [TN] Laser vias Sent by: TechNet <[log in to unmask]> Hi All, Anyone have any experience on a .001 laser via drilled through .0005 copper and a .002 thick polyimide. The opening on the bottom side of the laser hole is supposed to be .0004-.0006 with the taper. Can this be plated reliably? Would an additive process make this better? Thanks in advance. Steve Kelly PFC_2col.png CREATING A FLEXIBLE FUTURE Steve Kelly (416) 750-8433 (work) (416) 750-0016 (fax) (416) 577-8433 (cell) ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 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 847-615-7100 ext.2815 ----------------------------------------------------- ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 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 847-615-7100 ext.2815 -----------------------------------------------------