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Investigation and Design of Stacked Oxide Polarity Gate JLTFET in the Presence of Interface Trap Charges for Analog/RF Applications

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Abstract

In this manuscript, the reliability of stacked oxide (SO) heterogeneous gate dielectric polarity gate junction less tunnel FET (PG JLTFET) has been investigated. The stacked oxide PG JLTFET (SO PG JLTFET) has been implemented using a high-k gate dielectric material (HfO2) layer that has been modeled on top of the silicon dioxide (SiO2) layer to improve the device performance. The stacked oxide based approach leads to decrement in leakage current at gate-channel interface and improves the channel interface maintenance quality of the device. The study has been conducted by analyzing the effect of both donor and acceptor interface charges (ITCs), present at the interface of silicon and oxide layer. Various DC and analog/RF performance parameters such as electric field, carrier concentration, device efficiency, cut off frequency (fT), input, output characteristics, higher order transconductance coefficients (gm2, gm3), transconductance frequency product (TFP) etc. have been analyzed. Besides, impact of ITCs on signal distortion and linearity for SO PG JLTFET using the parameters such as second order voltage intercept point (VIP2), third order voltage intercept point (VIP3), third order input intercept point (IIP3), third order intermodulation distortion (IMD3) and 1-dB compression point have been studied in depth. The results obtained have also been compared with conventional polarity gate JLTFET (PG JLTFET). It has been observed, that the SO PG JLTFET is less sensitive to ITCs as compared to PG JLTFET.

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Acknowledgements

The authors would like to thank the JIIT authority for providing continuous support related to research work.

Availability of Data and Material (Data Transparency)

All the data taken from another resource has been given the corresponding reference. The data, for which reference is not provided, is the original data.

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The code has been implemented on 2-D silvaco ATLAS device simulator.

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Kaushal Nigam, Sajai Vir Singh and Priyanka Kwatra in this work contributed equally to the design and implementation of the research, to the analysis of the results and to the writing of the manuscript.

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Correspondence to Priyanka Kwatra.

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Kaushal Nigam, Sajai Vir Singh and Priyanka Kwatra state that there are no conflicts of interest. This article does not contain any studies with human or animal subjects.

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Nigam, K., Singh, S.V. & Kwatra, P. Investigation and Design of Stacked Oxide Polarity Gate JLTFET in the Presence of Interface Trap Charges for Analog/RF Applications. Silicon 14, 3963–3980 (2022). https://doi.org/10.1007/s12633-021-01162-9

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