HI, I am looking for vendors to supply oxidized Si wafers with the following specifications - 400-425 um thick, DSP with 1 um oxide and resistivity > 2000 ohm-cm, N-type and <100> orientation. I am also looking for oxidization services to grow about 1 um thick oxide on 4" bare silicon wafers . Thanks, Saravana. Graduate Research Asst., Center for Wireless and Microwave Information Systems, University of South Florida, Tampa, FL, Ph: 813-974-4851, Cell: 813-368-8043, Fax: 813-974-5250.