Hi, Look at this: Mattias Vangbo and Ylva Bäcklund 1996 J. Micromech. Microeng. 6 279 Arno An: General MEMS discussion Betreff: [mems-talk] Finding [110] direction on (100) SOI wafer Greetings everyone, I would like to find out the exact [110] crystal direction of a (100) SOI wafer before my first mask. The top Si (100) is about 200um thick. Wafer will come with flat supposedly aligned to [110] direction, yet may have anyway from 0 to 3 degree alignment variation to [110]. Your suggestions would be greatly appreciated. Best regards, --- Qi Luo