Numerical and analytical investigations for the SOI LDMOS with alternated high-k dielectric and step doped silicon pillars*

Author:

Yao Jia-Fei,Guo Yu-Feng,Zhang Zhen-Yu,Yang Ke-Meng,Zhang Mao-Lin,Xia Tian

Abstract

Abstract This paper presents a new silicon-on-insulator (SOI) lateral-double-diffused metal-oxide-semiconductor transistor (LDMOST) device with alternated high-k dielectric and step doped silicon pillars (HKSD device). Due to the modulation of step doping technology and high-k dielectric on the electric field and doped profile of each zone, the HKSD device shows a greater performance. The analytical models of the potential, electric field, optimal breakdown voltage, and optimal doped profile are derived. The analytical results and the simulated results are basically consistent, which confirms the proposed model suitable for the HKSD device. The potential and electric field modulation mechanism are investigated based on the simulation and analytical models. Furthermore, the influence of the parameters on the breakdown voltage (BV) and specific on-resistance (R on, sp) are obtained. The results indicate that the HKSD device has a higher BV and lower R on, sp compared to the SD device and HK device.

Publisher

IOP Publishing

Subject

General Physics and Astronomy

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