IPC- RF-245 for rigid flexes and IPC- FC-250 for single and double sided

If your system requires it you may be required to list the material specs 
IPC-FC-231B,IPC-FC-232B,IPC-FC-233A and IPC-FC-241B (these revisions may 
have changed)
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>From: ipc!ipc.org!TechNet-request
>To: TechNet
>Subject: Flex Circuit Specs
>Date: Friday, October 20, 1995 12:21PM
>
>
>What is the equivalent spec. for flex circuits that IPC-RB-276 is for
>rigid printed boards?
>
>Also, what other IPC specs should be called out on the fab drawing?
>
>Thanks in advance:
>
>--------------------------------------
>Larry L. Pucket
>Sandia National Labs.
>Dept. 2784  MS/0624
>P.O. Box 5800
>Albuquerque, NM 87185-0624
>
>Email:
>Phone: (505) 844-1711
>Fax:   (505) 844-7428
>
>