MEMaterial will show how to vary process parameters and see its impact on material properties (such as refreactive index) on various films (such as silicon nitride or silicon oxide). We have a lot of data on refractive index of thin films. This may be an alternative to implant process. Let us know if you are interested and we will send you info. Sincerely, Fariborz Maseeh IntelliSense Corporation 16 Upton Drive Wilmington, MA 01887 (508) 988 - 8000 (508) 988 - 8001 fax