I am trying to determine how large I can go for a new board design, and am wondering what experiences some of you may have had. The design will house fine pitch devices and a PBGA 1.6mm thick FR4 8/10 layers Components are on both sides P0.65mm/H0.3mm Vias and 0.2mm space/clearance SMT reflow & most likely Wave for THT parts Co-Planarity/Warpage kept to a minimum (This PCB will go into a moving/hinged frame. I am looking to keep the flexibility of the PCB to a minimum. There will also be a large number of wiring harness connecting to the PWA) Is anyone able to suggest what a reasonable limit is to aim for? Regards, Colin Weber --------------------------------------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d 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 delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site http://www.ipc.org/html/forum.htm for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------------