huge. Even more than 100 if you choose some recipes aiming at fast etching. On Mon, Aug 24, 2009 at 7:20 AM, renil kumarwrote: > Hi all, > Can I use PMMA as hard mask during Silicon DRIE. What is the selectivity between PMMA and Silicon during Bosch process. Any suggestions regarding this will be grately appreciated. > > renil * Zou Jie (Jay) * Department of Physics * University of Florida * Tel: +1-352-846-8018 * Email: zoujiepku@gmail.com * Homepage: http://plaza.ufl.edu/zoujie/