Measuring the contact angle of a drop of water will give you an idea of whether you have clean glass (the water spreads) or you have an organic coating (the water beads up). --Kirt Williams ----- Original Message ----- From: "Wullinger, Michaela"To: Sent: Thursday, April 27, 2006 12:05 AM Subject: [mems-talk] How to analyse surface conditions? Hi I'm looking appropriate methods to analyse the surface conditions during processing of masks. What I need to know: contaminations? Surface bonds? H2O content? Which methods can you suggest?