I wonder if a PDMS bond between two wafers will withstand a KOH etch, or will the interface fail? Roger Shile -----Original Message----- KOH doesn't affect PDMS Shay -----Original Message----- Hello, I wanted to know if anyone of you has an experience with performing EDP/KOH etch of a Si wafer with PDMS or photopatternable silicone WL 5150 patterned on the back side. Does the EDP/KOH etch damage the PDMS or the photopatternable silicone? Thank you very much, Anurag Tripathi