All-Inkjet Printed Flexible Capacitors Utilizing SU-8 and PVP Dielectric Inks

Abstract

This paper presents fabrication of printed interdigital capacitors on a flexible and lightweight polyester (PET) substrate. Capacitors were fabricated using inkjet printing technology and conventional low temperature (100-150°C) curing method. The surface of printed capacitors were covered with dielectric material, which lend capacitor a specific value of permittivity, but also serves as protective coating. Cross-linked poly-4- vinylphenol (cPVP) and SU-8 were applied as dielectric materials and experimental results are compared.