1. Norbert F, Holger B, and Steffen H, SID 07 DIGEST, 2007, 69.
2. Lu H Y, Liu P T, and Hu C W A., SID 07 DIGEST, 2007, 169.
3. Tetsuo U, Tatsuya S, Koichi T, SID 07 DIGEST, 2007, 161.
4. Arai T, Morosawa N, Hiromasu Y, and Hidaka K Micro. SID 07 DIGEST, 2007, 370.
5. Li J, Zhao S Y, and Xiong S Z, Chinese Journal of Semiconductor, 6 (2005), 617.