Here are a couple of Image Reversal recipes I use. I find that the second one works a little better for me. Also, these are in shorthand, so some things might be missing. The equipment I use may be different than what you use, so don't take it literally. This is Junghoon's recipe for image reversal with AZ 5214. 1. cleaning : 5:1 Piranha / 10 min --> rinse --> --> blow dry --> hot plate 145~150C / 10 min 2. HMDS 3-4min 3. PR coating /AZ5214 / 4000rpm/ 30sec --> soft baking (100C, 1min) 4. Karl suss exposure / 16 ~ 18 sec (I= 6.0 mW/cm^2) 5. Hotplate 100C, 2 min 6. Flood exposure, 120 sec 7. Develop, AZ400K 1:5, short time (~20 sec.) --> hot plate 90C/ 20 sec This is Cho's recipe for image reversal with AZ 5214. 1. cleaning : 5:1 Piranha / 10 min --> rinse --> blow dry --> hot plate 145~150C / 10 min 2. HMDS 3-4min 3. PR coating /AZ5214 / 4000rpm/ 30sec --> soft baking (100C, 1min) 4. Karl suss exposure / 18 sec (I= 6.0 mW/cm^2) 5. Hotplate 100C, 45 sec 6. Flood exposure, 180 sec 7. Develop, AZ400K 1:5, short time --> hot plate 90C/ 20 sec 8. Hard Bake. Jesse Fowler UCLA/MAE Dept., 420 Westwood Plaza, Room 18-121, ENGR IV Los Angeles, CA 90095-1597 | (310)825-3977 "Rule #6: There is no rule #6" -- Monty Python "ARTICLE SIX: THIS ARTICLE IS ABOLISHED" -- Constitution of Afghanistan On Wed, 9 Jan 2002, shaoning wrote: > Hello, everybody, > > Does anyone know the contact info of manufacturer or vendor of AZ5214 > photoresist? It is said it can be reversed from positive to negative polarity > by different baking. Thank you very much for every information. > > Shaoning > _______________________________________________ > mems-talk@memsnet.org mailing list: to unsubscribe or change your list > options, visit http://mail.mems-exchange.org/mailman/listinfo/mems-talk > Hosted by the MEMS Exchange, providers of MEMS processing services. > Visit us at http://www.mems-exchange.org/