Compact Model for Tunnel Diode Body Contact SOI n-MOSFETs

Abstract

A compact model for tunnel diode body contact (TDBC) silicon-on-insulator (SOI) n-MOSFETs was developed in this paper. The compact model is implemented in Verilog-A to simulate the dc and radio frequency (RF) performance of a TDBC SOI MOSFET. The TDBC SOI MOSFETs are successfully fabricated and are used to measure important transistor electrical parameters. The investigation results reveal that TDBC structure suppresses floating body effects (FBEs) as well as T-gate body (TB) contact structure and shows significant improvement in RF performance without introducing additional parasitic capacitances compared with the TB device. Kink phenomena and an abnormal subthreshold swing originating from FBEs are sufficiently suppressed. It is demonstrated that the TDBC SOI MOSFETs provide a promising concept for digital, analog, and RF applications. The outputs from this analytic model are in fair agreement with the TDBC experimental data, which validates the effectiveness and robustness of the compact model for TDBC SOI technology. Finally, good accuracy ensures that the proposed model is applicable for the implementation in circuit simulation tools.