Dear All, I am modelling and simulating the suspended membrane conductor on top of the bottom fixed electrode with ANSYS 6.1. I use shell element to model the membrane and solid element for the air gap. But I don't know how to apply the Maxwell surface flag manually and don't know how to determine its value. If you have any experience with this situation, please give me some recommendations. Many thanks in advance for your help! Yong __________________________________________________ Do you Yahoo!? New DSL Internet Access from SBC & Yahoo! http://sbc.yahoo.com