RF Powered Flexible Printed Ion-sensitive Organic Field Effect Transistor Chip with Design-to-manufacturing Automation for Mobile Bio-sensing

Ion-sensitive organic field effect transistor (ISOFET) is built based on maskless printing processes with printed solid-state reference and sensing electrodes. Based on the low trap density OFET technology, the printed OFETs exhibit excellent low voltage operation behaviors including steep subthreshold swing, large ON/OFF ratio, negligible hysteresis and excellent bias stability. An automatic design-to-manufacturing tool is developed to directly convert the circuitry design to the layout format being recognized by the inkjet printer. A battery-less flexible hybrid integration system was constructed by integrating the ISOFET chip with a 13.56 MHz RFID chip, and demonstrated for a mobile bio-sensing platform with friendly connectivity to the smartphone.