When we've processed flex boards in our clean room most people start by adhering
the substrate to a wafer or a mask blank.  The adhesive you use will depend on
your downstream processes.  You might try one of the crystal bond thermal
adhesives.

-Michael

>>> Pavan Samudrala  4/27/2009 11:07 PM >>>
Hello all,

I was wondering if anyone had experience doing lithography on foils. I am
trying to pattern 3um features on a foil using MA8 and cannot get the foil
flat to the surface of photomask. I tried bonding the borders of the foil to
rectangular frame but still had some wrinkles (folds) which makes it
difficult to pattern. The backside of the foil is also important and cannot
destroy it. Any ideas would be appreciated.

Thanks,

Pavan Samudrala