1. Department of Electronics Engineering, Chung Hua University, Hsinchu, Taiwan, 30012, R.O.C
2. Department of Electronics Engineering, National Chiao Tung University, Hsinchu, Taiwan, 30010, R.O.C
3. International College of Semiconductor Technology, National Chiao Tung University, Hsinchu, Taiwan, 30010, R.O.C