High-resolution inkjet printing of all-polymer transistor circuits

Direct printing of functional electronic materials may provide a new route to Low-cost fabrication of integrated circuits. However, to be useful it mu st allow continuous manufacturing of all circuit components by successive s olution deposition and printing steps in the same environment. We demonstra te direct inkjet printing of complete transistor circuits, including via-ho le interconnections based on solution-processed polymer conductors, insulat ors, and self-organizing semiconductors. We show that the use of substrate surface energy patterning to direct the flow of water-based conducting poly mer inkjet droplets enables high-resolution definition of practical channel Lengths of 5 micrometers. High mobilities of 0.02 square centimeters per v olt second and on-off current switching ratios of 10(5) were achieved.