1. a Department of Materials Science and Engineering , University of Cincinnati , Cincinnati , Ohio , 45221 , U.S.A.
2. b 03-4F-1, 310 Cheih-Shou Road, Tao-Yuan , Taiwan, ROC.
3. c The Advanced Technology Center, Semiconductor Products Sector , Motorola Inc, 2200, West Broadway, Mesa , Arizona , 85202 , U.S.A.