Large-area compliant tactile sensors using printed carbon nanotube active-matrix backplanes

Abstract

A 20 × 20 pixel pressure sensor array based on a printed active-matrix single-wall carbon-nanotube thin-film transistor backplane is presented. Using a gravure printing process that is compatible with fully printed large-area roll-to-roll processing, a 97% device yield is obtained on the 400-transistor backplane. As a proof of concept, pressure sensors are integrated to map the applied tactile pressure across the array.

Keywords: active-matrix backplane; carbon-nanotube transistors; flexible electronics; pressure sensors; printed electronics.