1. Consultant, P.O. Box 2413, Santa Rosa, California, 95405, USA
2. Sino-American Silicon Products Inc., Innovation Technology Research Center, No. 8, Industry E. Rd. II Hsinchu Science Park, Hsinchu 30075, Taiwan, R.O.C.
3. Current address: Adjunct Research Faculty, Department of Physics, Portland State University P.O. Box 751, Portland, OR 97207-0751, USA