Dear all, Is there any way that the refractive index of the SU-8 be altered, i.e during the baking/ curing stage? Some polymers do change their R.I's when subject to heating at different temperatures. A slight change in the index is an advantage. Usually, lower than 1%, prefably 0.4%. Is there anyone who has done any study on the refractive index variation of the SU-8? Your kind help is highly appreciated. Abang Annuar Ehsan Universiti Kebangsaan Malaysia