Fabrication of polymer based flexible sensors for EoG and EMG applications

Abstract

Range of materials from polymeric to inorganic materials encompasses a wide array of performance benchmarks as reported in the International Roadmap for Devices and Systems (IRDS) in the field of Large Area and Flexible Electronics for market greater than $100 Billion. It is these benchmarks of device characteristics (electrical and mechanical), and processes involved to make the device that will ultimately determine the suitable application.This paper focuses on simulation and development of a flexible thin film sensor for sensing of biomedical micro forces or displacement. These include, identification and characterization of biological and electrophysiological changes induced by controlled, focal application of mechanical force for biomedical application.Measurement of the nonlinear behavior of the thin films fabricated using various spectroscopic instruments. The study on surface morphology using SEM for surface roughness, phase crystalline nature using X- ray Diffraction, optical behavior using UV–Visible spectroscopy for analytic study of band gap and stress strain using Universal Test Machine. The study of electromechanical response to understand the piezo electric behavior or pressure sensing using fabricated sensor was done for wearable electronics used for sensing physiological signals Electromyography (EMG) and Electro-oculogram (EoG). The sensors were used as dry electrode for testing EMG and EoG using amplifiers and filters as compared to the performance of standard available wet electrodes.