1. Department of Materials Science and Engineering; National Chiao Tung University; Hsinchu; 300; Taiwan
2. Department of Electrical and Electronic Engineering; Chung-Cheng Institute of Technology, National Defense University; Tahsi; Taoyuan; 335; Taiwan; ROC
3. Institute of Electro-Optical Engineering; Chang Gung University; Taoyuan; 333; Taiwan; ROC
4. Centers of General Education; Chung Hua University; Hsinchu; 300; Taiwan; ROC