Dear colleagues, Is there any IPC or other standard talking about the good design practices that ensure PCB flatness? Does any standard explain how to balance Cu, for instance? Or how to choose laminate or design the stackup? Thanks, Ioan Tempea, ing. Ingénieur Principal Fabrication / Sr. Manufacturing Engineer 30 ans déjà! - Already 30 years! 950 rue Bergar, Laval, Québec, H7L 5A1 t : 450-967-7100 ext : 244 Mtl : 514-990-5762 f : 450-967-7444 [log in to unmask] www.digico.cc <http://www.digico.cc/> P N'imprimer que si nécessaire - Print only if you must --------------------------------------------------- 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 -----------------------------------------------------