IPA is listed as a standard rinsing agent by Microchem. However, the discussion in http://aveclafaux.freeservers.com/SU-8.html suggested IPA may not be most appropriate. I would like to query what is the exact functionality of IPA as rinsing? What actually happens when we rinsed the substrate developed in SU-8 standard developer? Does the IPA molecules "takes out" the SU-8 developer molecule by chemically adhering to it and then evaporates quickly with it, or it works on other mechanism? We mixed IPA and SU-8 standard developer and found that the two does not mix. What does SU-8 developer actually contains? Comments and suggestions are welcomed. Thanks for reading this. __________________________________________________ Do You Yahoo!? http://bb.yahoo.co.jp/