Dear Nam et al., I've obtained (link to journal article below) a much improved process lift-off for fabricating thin film devices (compared to conventional lift-off) down to 3 micron line features (with Karl Suss MJB3 mask aligner in proximity mode) using image-reversal (negative sloping resist sidewalls) with AZ5214E and AZ developer: http://www.iop.org/EJ/abstract/1742-6596/92/1/012180 Best regards, Thomas E. Wilson Professor of Physics Marshall University Science 154 One John Marshall Drive Huntington, WV 25755-2570 Tel: 304.696.2752 FAX: 304.696.3243