Device modelling for bendable piezoelectric FET-based touch sensing system

Gupta, S., Heidari, H., Vilouras, A., Lorenzelli, L. and Dahiya, R. (2016) Device modelling for bendable piezoelectric FET-based touch sensing system. IEEE Transactions on Circuits and Systems I: Regular Papers, 63(12), pp. 2200-2208. (doi:10.1109/TCSI.2016.2615108)

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Abstract

Flexible electronics is rapidly evolving towards devices and circuits to enable numerous new applications. The high-performance, in terms of response speed, uniformity and reliability, remains a sticking point. The potential solutions for high-performance related challenges bring us back to the timetested silicon based electronics. However, the changes in the response of silicon based devices due to bending related stresses is a concern, especially because there are no suitable models to predict this behavior. This also makes the circuit design a difficult task. This paper reports advances in this direction, through our research on bendable Piezoelectric Oxide Semiconductor Field Effect Transistor (POSFET) based touch sensors. The analytical model of POSFET, complimented with Verilog-A model, is presented to describe the device behavior under normal force in planar and stressed conditions. Further, dynamic readout circuit compensation of POSFET devices have been analyzed and compared with similar arrangement to reduce the piezoresistive effect under tensile and compressive stresses. This approach introduces a first step towards the systematic modeling of stress induced changes in device response. This systematic study will help realize high-performance bendable microsystems with integrated sensors and readout circuitry on ultra-thin chips (UTCs) needed in various applications, in particular, the electronic skin (e-skin).

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Dahiya, Dr Ravinder and Heidari, Dr Hadi
Authors: Gupta, S., Heidari, H., Vilouras, A., Lorenzelli, L., and Dahiya, R.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:IEEE Transactions on Circuits and Systems I: Regular Papers
Publisher:IEEE
ISSN:1549-8328
ISSN (Online):1558-0806
Published Online:16 November 2016
Copyright Holders:Copyright © 2016 IEEE
First Published:First published in IEEE Transactions on Circuits and Systems I: Regular Papers 63(12):2200-2208
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
682141CONTESTRavinder DahiyaEuropean Commission (EC)317488ENG - ENGINEERING ELECTRONICS & NANO ENG
663861Engineering Fellowships for Growth: Printed Tactile SKINRavinder DahiyaEngineering & Physical Sciences Research Council (EPSRC)EP/M002527/1ENG - ENGINEERING ELECTRONICS & NANO ENG
659051Flexible Electronics Device Modelling (FLEXELDEMO)Ravinder DahiyaEngineering & Physical Sciences Research Council (EPSRC)EP/M002519/1ENG - ENGINEERING ELECTRONICS & NANO ENG
636381EPSRC Centre for Doctoral Training in Sensing and MeasurementAndrew HarveyEngineering & Physical Sciences Research Council (EPSRC)EP/L016753/1SCHOOL OF PHYSICS & ASTRONOMY