Laser-Induced Graphene Pressure Sensors Manufactured via Inkjet PCB Printer : Locally Producing Super-Sensitive and Cost-Effective Circular Diaphragm Pressure Gauges

This paper demonstrates two firsts for the fields of laser-induced graphene (LIG) sensors and printed electronics (PE): (1) a LIG Kapton circular diaphragm gauge pressure sensor with a multi-resistor network; (2) the wiring and encapsulation of said sensor, printed with conductive and dielectric inks (CI and DI) utilized by the BotFactory SV2 thermal Inkjet PCB printer. In addition, the PE tool allows for automated solder paste dispensing and the pick-and-place of electronic components to form complete functioning microsystems, consisting of microcontrollers, thin-film batteries, passive components, antennas, etc. These capabilities further enhance the prospect of LIG sensors by providing to them off-grid power, read-out circuitry, amplification, and simple wireless data transmission.