HI, If you dont have O2 Plasma or anything similar RIE equipment then best is to keep that sample under water for few hours or days. This helped me to a certain extent but not much. Regarding SU8 i tried that too but could not get good results. I think you will need O2 plasma exposure for 30-60sec to get SU8 on PDMS. All the best. Yusuf On Wed, Sep 24, 2008 at 3:10 PM, DEBASHIS MAJIwrote: > Hi all, > > I am trying to convert the hydrophobic nature of PDMS layer into > hydrophilic. I have referred to some texts, where they have mentioned about > the PDMS surface treatment with Oxygen plasma. But currently there is no > provision here for treating with oxygen plasma. Can anybody please suggest > me an alternative method for making the PDMS surface hydrophilic? > > Also can anybody suggest me how to put a layer of SU8 over the PDMS > layer? I observed that SU8 is not staying over the PDMS surface due to its > hydrophobic nature. -- Mohd.Yusuf.S.Mulla Student-FH Jena, Germany. Currently at :- Leuven, Belgium