Chin. Phys. B ›› 2014, Vol. 23 ›› Issue (1): 18501-018501.doi: 10.1088/1674-1056/23/1/018501
• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇 下一篇
李聪, 庄奕琪, 张丽, 靳刚
Li Cong (李聪), Zhuang Yi-Qi (庄奕琪), Zhang Li (张丽), Jin Gang (靳刚)
摘要: Based on the quasi-two-dimensional (2D) solution of Poisson’s equation in two continuous channel regions, an analytical threshold voltage model for short-channel junctionless dual-material cylindrical surrounding-gate (JLDMCSG) metal-oxide-semiconductor field-effect transistor (MOSFET) is developed. Using the derived model, channel potential distribution, horizontal electrical field distribution, and threshold voltage roll-off of JLDMCSG MOSFET are investigated. Compared with junctionless single-material CSG (JLSGCSG) MOSFET, JLDMCSG MOSFET can effectively suppress short-channel effects and simultaneously improve carrier transport efficiency. It is also revealed that threshold voltage roll-off of JLDMCSG can be significantly reduced by adopting both a small oxide thickness and a small silicon channel radius. The model is verified by comparing its calculated results with that obtained from three-dimensional (3D) numerical device simulator ISE.
中图分类号: (Semiconductor-device characterization, design, and modeling)