Hi Rob, We've been working with pyrex about 1mm thick and sparingly about 1. 5mm, So what's your problem now? Li Zhuang University of Science and Technology of China >Wondering if anyone has any experience anodic-bonding pyrex wafers to >silicon wafers, where the pyrex is thicker than normal. >For a 100mm wafer typical thicknesses I've worked >with are in the 400-600um range. Has anyone had experience working with >wafers 2 or 3 times thicker? >Rob MacDonald >Shearwater Scientific