Tweaking the Performance of Dopingless Nano-TFET with Misaligned Sandwiched Dual-Gate Structure

Abstract

While scaling down the devices it is important not to compromise with the performance. Scaling of tunnel devices shows better performance than Field Effect Transistors (FETs). Charge Plasma based Dopingless Double Gate Tunnel Field Effect Transistor (DLDGTFET) with its various misaligned configurations are designed, discussed and analyzed in the presented work. Silicon is preferred as a choice of material. For various misalignment configurations, initially, bottom gate is shifted towards the right, then it is shifted towards left and at last bottom and top, both gates are misplaced for analyzing the device parameters, analog parameters and linearity parameters. By misalignment, it is observed that either the bottom gate is misaligned towards the right or left or both gates are being misaligned, device performance degraded. The basic structure shows the higher drain current, better drive current among other structures such as 15 μA. whereas source underlapped (SU100) structure shows the better subthreshold slope such as 20 mV/decade. But SU100 has the least amount of drive current. In the subthreshold region, BM100 has the maximum value of transconductance gain factor i.e. 104 V−1. When the bottom gate is shifted towards right i.e. for drain overlapped structure it was observed that it shows better linearity parameters and can be considered for low noise and low voltage applications.