Hello, Does anyone think that I need really special photoresist such as AZ-111, AZ-1350OH, KMER for Au etching? actually I have shipley 3813. does it matter if I use this shipley 3813? SangHwui Lee Ph.D candidate/MSE/NJIT Microelectronics Research Center(MRC) 973-596-6368(O) 201-242-1486(H) _________________________________________________________________ Tired of spam? Get advanced junk mail protection with MSN 8. http://join.msn.com/?page=features/junkmail