I have an issue with an assembled board that occasionally experiences flex in routine use, and I need to determine whether it is a reliability concern. Prior to engaging in a full-blown reliability study, I would like to know whether there are any industry specifications (IPC or otherwise) that relate to finished assembly flex (bow/twist). The closest thing I have found is IPC-A-610C, page 10-16, regarding bow and twist after soldering. Are there published reliability studies (solder joint, trace, other features) related to bow/twist/flex of assembled boards? Please advise. Regards, Doreen Fisher Dell Computer Corporation [log in to unmask] 512.728.3753 --------------------------------------------------------------------------------- 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 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 ---------------------------------------------------------------------------------