Steep Slope Silicon-On-Insulator Feedback Field-Effect Transistor: Design and Performance Analysis

Feedback field-effect transistor (FBFET), an alternative switching device, has received attention due to its ideal steep switching feature. By utilizing the positive feedback phenomenon, the total amount of electrons and holes contributing to drain current is sharply surged. Although the device has conspicuous subthreshold slope (SS) properties, advanced research for structure and performance of it is lacking. In this paper, single-gated and spacer-less silicon-on-insulator (SOI) FBFET with extremely steep switching (~1 mV/decade) characteristic is studied in various aspects; SS attribute, performance variation of scaled FBFET, the impact of structural variation, the gate margin for the device layout, and the hysteresis window. The prospect of SOI FBFET as a future candidate for CMOS logic application is investigated in detail.