Another PMMA question, that is more general in nature - when I e-beam evaporate metal onto my PMMA resist - how much does it affect its sensitivity for e-beam writing? during e-beam evaporation there's a lot of electrons and x-rays in the chamber. I don't know how severe that is and how much it affects the dosage during writing... thanks in advance for any info on that. Jaroslaw Syzdek Ernest Orlando Lawrence Berkeley National Laboratory Environmental Energy Technologies Division Advanced Energy Technology 1 Cyclotron Road MS70R0108B Room 193 Berkeley, CA 94720-8168 (GMT-8) United States of America