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Electrical Characterization of Traditional and Aerosol Jet PrintedConductors Under Tensile Strain
Published online by Cambridge University Press: 11 January 2016
Abstract
In this work, we propose a model to quantify strain induced conductordiscontinuities based on measuring electrical resistance while applying tensilestrain to metal-polymer systems. Under strain, changing conductor geometry andinduced conductor discontinuity increase electrical resistance. On Kaptonsubstrates strained to ε = .07, evaporated gold films did notdeform and resistance increase was only caused by geometry change. Conversely,discontinuity caused 31% and 72% of the resistance increase in evaporated andprinted silver films at the same strain. On PDMS substrates, the same magnitudeof discontinuity, causing 31% of the resistance increase, occurred at onlyε = .024 in evaporated silver films. At the same strain,discontinuity caused 86% of the resistance increase in evaporated gold films.Printed silver films were inelastic. The results suggest that traditionalfabrication techniques may be more suitable to flexible hybrid electronicsapplications than additively manufactured conductors.
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- Copyright © Materials Research Society 2016
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