I am very interested in any replies as well. I have built with 1 oz
copper planes in the past and tried to leave as much copper on the
signals as possible. If there is a material or process available to
stiffen the pcb, please pass it along.
Steve

We have a pcb that measures about 13" x 5", 6 layers (2 power and 4
signal),
FR4, 0.062" thick (plug in IBM PC card).  This board seems to be very
flexable--more than other boards of the same size that we have seen.  Is
there a specific type of FR4 we can specify to make the board "stiffer"?

Thanks,

Charles

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