PEDOT: PSS Polymer Aerosol Jet-printing for Robotic Skin Sensors

Robot skin sensors are being developed to improve the tactile perception that comes with physical touch. This is desired as it enhances the interaction between robots and humans. In this publication, we present a process for improving the deposition of PEDOT: PSS using Aerosol jet printing technology. Previously, we deposited PEDOT: PSS with the MEMS fabrication techniques in the cleanroom. The PEDOT: PSS, an organic polymer that gives the robot skin sensors their piezoresistive ability, is deposited on the designated microfabricated sensor electrodes, significantly cutting down the manufacturing time. Testing of the robot skin sensors is done on an automated testing station having a force plunger and an integrated circuit. The results display the resistance values measured across the sensors and their tactile responses to applied strain.