1. Institute of Microelectronics,
Department of Electrical Engineering, National Cheng Kung University, Tainan 701, Taiwan, R.O.C.
2. Advanced Optoelectronic Technology
Center, National Cheng Kung University,
Tainan 701, Taiwan, R.O.C.
3. Department of Materials Engineering/Center
for Thin Film Technologies and Applications, Ming Chi University of Technology, Taishan, Taipei 24301, Taiwan,
R.O.C.