Hi. I would like to know if Gold is CMOS compatible (actually i heard that it is not and am looking for reasons). If it indeed is not CMOS compatible then why do many use gold as a reflective coating in micromachined optical switches? Similarly, i would like to know how serious it is to use NaOH and KOH in CMOS clean rooms. Please e-mail me at rk@geektown.net Regards Rama