Hello, What does IPC-D-275 state concerning pcb flatness (bow and twist)? We are producing a panel (12"x18") of small, unique boards. The boards are intended to be surface mounted to larger boards. I feel a note should be added to the fabrication drawing to specify the acceptable flatness: 1) What is the acceptable flatness for boards intended for automated assembly of surface mounted components? Would this be applicable to our boards eventhough they are the intended component? 2) Should the flatness requirement be applied to the entire panel or to the individual boards? (The boards will be shipped still in the routed panel.) TIA, Donna RadioConnect Corporation Culver City, CA ################################################################ 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's web site (http://www.ipc.org) "On-Line Services" section for additional information. For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312 ################################################################ ################################################################ 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's web site (http://www.ipc.org) "On-Line Services" section for additional information. For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312 ################################################################