Gary regarding a 55110 equivalent, try IPC-RB-276. This document is published but will shortly be superseded by IPC-6011 (Generic PWB performance) and 6012 (Rigid PWB performance) Regards __________________________________________________ David W. Bergman, Technical Director IPC 2215 Sanders Road Northbrook, IL 60062-6135 847-509-9700 x340 Phone 847-509-9798 Fax email [log in to unmask] www http://www.ipc.org faxback support 800-646-0089 --------------------------------------------------- On Tue, 13 Aug 1996, Gary Peterson wrote: > I am in an advanced development group at Sandia. For the last 8 years > we have used commercial PWBs and solder-assembly methods/suppliers for > all of our projects. These were typically 6Ux160mm VME boards, double-sided > SMT with some thru-hole connectors, 8 to 10 layers, nominal 5/5 lines/spaces, > 180 Tg FR4. Components included PBGAs, 25-mil and 50-mil pitch SOICs and PQFPs, > 0.5mm and 0.4mm pitch PQFPs, etc. Speeds from 10-80MHz CMOS to high-speed ECL > and GAS RF stuff for RADARs and the like. Some controlled impedance required. > > We are brainstorming issues related to commercial suppliers for future > weapons component PWBs. Can anyone help me with a comparison of > commercial specs. vs "mil" specs. I don't know much about the mil-specs > but I thought I heard they are being eliminated. Is there and IPC spec > that can be called out that will give the weapons guys the equivalent of > their old mil-P-55110 boards? My impression of most good PWB vendors today > is that we can't buy a bad board no matter how hard we try. > > The most convincing argument would be a side-by-side comparison of the > required tests for meeting the IPC commercial spec vs its military spec > equivalent. > > Thanks in advance, > > Gary P. > --- > Gary D. Peterson > _/_/_/ _/ _/ _/ SANDIA NATIONAL LABORATORIES _/_/_/ > _/ _/_/ _/ _/ P.O. Box 5800, M/S 0503 _/_/ > _/_/_/ _/ _/ _/ _/ Albuquerque, NM 87185-0503 _/_/_/_/_/_/ > _/ _/ _/_/ _/ Phone: (505)844-6980 _/ _/_/ _/ > _/_/_/ _/ _/ _/_/_/_/ FAX: (505)844-2925 _/ _/_/ _/ > E-Mail: [log in to unmask] _/_/_/ > > > *************************************************************************** > * TechNet mail list is provided as a service by IPC using SmartList v3.05 * > *************************************************************************** > * To unsubscribe from this list at any time, send a message to: * > * [log in to unmask] with <subject: unsubscribe> and no text. * > *************************************************************************** > > *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To unsubscribe from this list at any time, send a message to: * * [log in to unmask] with <subject: unsubscribe> and no text. * ***************************************************************************