1. Corporate Research, Taiwan Semiconductor Manufacturing Company, Hsinchu 300, Taiwan
2. Department of Electrical Engineering, National Yang Ming Chiao Tung University, Hsinchu 300, Taiwan
3. Department of Electrophysics, National Yang Ming Chiao Tung University, Hsinchu 300, Taiwan
4. Pathfinding, Taiwan Semiconductor Manufacturing Company, Hsinchu 300, Taiwan