Hi, I've read a paper where borofloat glass was anodically bonded to an Si wafer with 1200 V at 450 C, I used 15N of force for total area of about 1/3 of a 3 inch wafer. The glass cracks, I tried 3 times. Does anyone have any suggestions about a better protocol? I've assumed the CTE is the same as Pyrex, which is true for the average CTE from 20-300C, but I haven't seen the data at 450 C. Thanks, Ziggy ******************** (Ziggy) Zigurts K. Majumdar Department of Physics Laboratory for Fluorescence Dynamics University of Illinois at Urbana Champaign 1110 West Green St. Urbana, IL 61801 ********************