Manufacturing of silver-ink micrometer inductors through multilayer D.O.D. printing for VHF Power Transfer

Silver-ink tracks features deposited through piezoelectric Drop-on-Demand printing, thanks to an innovative state-of-art printer, are described. Precise printing-trajectories are implemented to limit track-width and to increase thickness with the purpose of manufacturing high-conductivity spirals in order to create inductors for Very High Frequency power transfer applications. More layers are deposited onto polyimide without provoking noticeable track-width variations. The described printing methodology enabled a rapid and effective thickness increase, essential to manufacture high quality components characterized by low values of sheet resistance together with high values of quality factor.