I'd like to know if there is a minimum dielectric thickness requirement for flexes similar to the requirement for rigid boards in IPC-D-275? I've been looking through some of the flex specs (IPC-D-249, IPC-FC-231, IPC-FC-250) and haven't found anything that specifies a minimum. I would appretiate any help in locating this information, if there is any. Thank you, Larry Campbell BFGoodrich, Avionics Systems [log in to unmask]