Hi all, Does anyone know how to significantly decrease surface tension of photoresists, positive or negative, so as to spin-coat onto wafers with very low critical surface tension, such as PTFE? No surface pre-treatment is allowed because we want to keep the original low surface energy. Any suggestion is appreciated. Thanks in advance. Yiyi Zhang Department of Microgravity Institute of Mechanics, Chinese Academy of Sciences Beijing 100080 Send your FREE holiday greetings online! http://greetings.yahoo.com