Digital Printing of the Thin Film Sensor with Sharp Edge Based on Electrodynamics 3DP

ABSTRACT

We present a digital voltage printing regime for high-speed and high-precision Micro-jet printing. The voltage pulse peak induces a very fast Micro-jetting mode from the nozzle for a short duration, while a low voltage is picked to ensure the sharp edge, and the high voltage is picked to ensure the printing speed. The conducting films were assembled on electrode arrays of substrate and characterized with respect to their layer thickness and thermal properties. Through an optimal choice of the digital frequency dynamically, a jet-printing regime with a specified droplet size and droplet spacing can be created in different steps. High spatial resolution can also be achieved by properly coordinating the pulsing with large and small current. The edge burr problem was solved by using the dynamic control of the droplets sizes and jetting rapid through the pulse signal. The sensor was printed using heterogeneous material model. Sensor recovery time, response linearity and sensitivity were all significantly improved using the digital pulse regime fabrication.

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