Hi, members, Anyone knows where could I purchase quartz or silicon wafer with a poly-silicon layer (about 0.5 um)? for silicon wafer, a isolation SiO2 layer ( > 2 um) between Si and Poly is needed. Thanks Zhizhong Yin Phone#: 410-516-8525(o) Johns Hopkins University 410-662-4760(h) 200 Latrobe Hall email:zzyin@titan.me.jhu.edu 3400 N. Charles Street homepage:www.me.jhu.edu/~zzyin Baltimore MD 21218 ***********************************************************