Inkjet-Printing Rapid Prototyping of a Robust and Flexible Capacitive Touch Panel

In this work we present an inkjet-printed capacitive touch panel working in single-ended or self-capacitance mode. We show that inkjet-printing enables manufacturing of low-cost, though robust, touch sensing devices. The evaluated structure is realized as interlocking diamonds topology. Its robustness against undesired objects present at the sensor surface is demonstrated in different experimental setups such as application of water or metal to the sensor surface with simultaneous touch detection. The position resolution res(pos) of the fabricated device is approximately 100 mu m (approximate to 250 dpi) and thus well comparable with or better than resolutions reached by similar devices.