I have a customer with a specification for bare board warpage, but the part also has flatness and surface profile requirements on the print. The warpage requirement is in the customer's specification, which also says that any print requirements supercede the spec. Are flatness and warpage the same thing? Or are they additive? If the flatness spec is based on Maximum Material Condition do I get to include the warpage as separate MMC condition that's in addition to the flatness requirement? I've never been able to find anything in the ANSI Y14.5 for warpage, bow or twist which are the terms most of us are familiar with. Can anybody help me out here? Mike McMaster RF Product Engineer Merix Corporation Forest Grove OR 503-992-4263 ############################################################## TechNet Mail List 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 TECHNET <your full name> To unsubscribe: SIGNOFF TECHNET ############################################################## Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information. If you need assistance - contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ##############################################################