Jeffrey, Our flexible circuit supplier, gave us a copy of their designers guide which specs a minimum bend radius of 10 - 15 times the total thickness of the flexi (double sided), 6 times the thickness (single sided). Hope this helps. Regards, Adam Hawes (GenRad Ltd.) ################################################################ DesignerCouncil E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c ################################################################ To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE DesignerCouncil <your full name> To unsubscribe: SIGNOFF DesignerCouncil ################################################################ Please visit IPC web site (http://jefry.ipc.org/forum.htm) for additional information. For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311 ################################################################