Compact Model for Flexible Ion-Sensitive Field-Effect Transistor

Vilouras, A. and Dahiya, R. (2017) Compact Model for Flexible Ion-Sensitive Field-Effect Transistor. In: 2017 IEEE Biomedical Circuits and Systems Conference (BioCAS), Turin, Italy, 19-21 Oct 2017, ISBN 978150905803 (doi: 10.1109/BIOCAS.2017.8325217)

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Abstract

This paper presents the theoretical modelling, and simulation of bending effects on an ion-sensitive field-effect transistor (ISFET), towards futuristic bendable integrated circuits and microsystems for biomedical applications. Based on variations of threshold voltage and drain current under different bending conditions and orientations of the channel of the device, the bendable ISFET macro-model has been implemented in Verilog-A, and compiled into the Cadence environment. The effects of bending on the behaviour of the device have been simulated over a user-defined range of pH, and sensitivities in a standard 0.18-μm CMOS technology. It has been found that the transfer curves (Id-Vg) of ISFET vary up to 4.46% for tensile and up to 5.15% for compressive bending stress at pH 2, and up to 4.99% for tensile and 5.61% for compressive bending stress at pH 12 with respect to its planar counterpart, while the sensitivity of the device has been found to remain the same irrespectively of the bending stress. The proposed model has been validated by comparing the results with those obtained by other macro-models and experimental results in literature.

Item Type:Conference Proceedings
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Vilouras, Anastasios and Dahiya, Professor Ravinder
Authors: Vilouras, A., and Dahiya, R.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
ISBN:978150905803
Published Online:29 March 2018
Copyright Holders:Copyright © 2017 IEEE
First Published:First published in 2017 IEEE Biomedical Circuits and Systems Conference (BioCAS)
Publisher Policy:Reproduced in accordance with the publisher copyright policy

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
170185Engineering Fellowships for Growth: Printed Tactile SKINRavinder DahiyaEngineering and Physical Sciences Research Council (EPSRC)EP/M002527/1ENG - Electronics & Nanoscale Engineering
190828EPSRC Centre for Doctoral Training in Sensing and MeasurementAndrew HarveyEngineering and Physical Sciences Research Council (EPSRC)EP/L016753/1P&S - Physics & Astronomy