Microstructural-PVDF Dielectric Layer Based High-Resolution Flexible Capacitive Pressure Sensor

Abstract

Flexible capacitive pressure sensors are gaining increasing attention due to their excellent performance to sensing the external contact and pressure. Here, we report a high-resolution (10.3 dpi) flexible capacitive pressure sensor matrix with Microstructure-PVDF film and transferable electrode array (MPTEA) for pressure mapping. The sensor presents high linear sensitivity under 20 kPa (7.6 MPa <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-1</sup> ), fast response time (<; 100 ms), and excellent flexibility which can wrap on the finger very well. Moreover, the capacitance of each pixel in the MPTEA exhibited obviously change when get pressing, and different complex pressure patterns could be successfully located by it. The sensor has huge potential in various application, including robots, touchpad, human-machine interfaces and real-time pressure mapping.