Analysis of negative capacitance effect in nanoscale transistors for memory and biosensor applications

Abstract

The scaling of the transistor increases the density of the chip to newlinemeet the end-user requirements. The dennard scaling law predicted that the newlineswitching speed of the transistor improves with scaling down the technology newlinenode. Interestingly, the short channel effect in the sub-20nm technology arises newlineand has become an unavoidable metric. It further degrades the performance of newlinethe entire system with huge power consumption. The boltzmann tyranny of newline60mv/dec of subthreshold swing has become a bottleneck to the newlinesemiconductor industry which needs to be reduced. Multigate transistors have newlinebeen proposed to mitigate this problem and to achieve better electrostatics. newlineThe ferroelectric materials provide passive amplification by exhibiting the newlinenegative capacitance effect helps the industry to further scale down up to newline4nm. This technique is used to reduce the short channel effects and has a high newlineon current in the sub-20nm technology nodes. The usage of ferroelectric newlinematerials in the Carbon Nanotube Field Effect Transistor (CNFET) is studied newlinein this work and its short channel effect comprising subthreshold swing of newline25.39% and Drain induced barrier lowering of 32.14% is reduced. newlineAdditionally, CNFET is used to improve the reliability of the memory cells in newlineaerospace applications which is vulnerable to cosmic rays and requires newlineradiation-tolerant memory designs. Finally, the usage of ferroelectrics in newlinebioFET is studied with help of plasmon field-effect transistor doped with gold newlinenanoparticles aligned over the active layer for the biosensing applications. newlineThe incorporation of ferroelectric material in plasmon FET provides better newlinesensitivity and absorption. The coupling of proposed electronic and optical newlineelements in the single silicon chip is highly complicated and has compatibility newlineissues that need to be sorted out. newline