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Appl. Sci. 2018, 8(2), 195; https://doi.org/10.3390/app8020195

Effect of Substrates on the Dynamic Properties of Inkjet-Printed Ag Thin Films

Department of Mechanical Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Korea
These two authors contributed equally to this work.
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Author to whom correspondence should be addressed.
Received: 15 December 2017 / Revised: 20 January 2018 / Accepted: 25 January 2018 / Published: 29 January 2018
(This article belongs to the Special Issue Printed Electronics 2017)
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Abstract

The dynamic properties of inkjet-printed Ag thin films on flexible substrates were measured using flexural wave propagation. The Ag nanoparticle suspension was inkjet-printed on polyimide (PI), silicon wafer, and glass. The effects of flexible substrates on the dynamic properties of the films were investigated. Beam-shaped Ag-printed substrates were fabricated by pico-second laser pulse cutting. The wave approach was presented to analyze the vibrations of the thin film on the substrates. The Young’s modulus and loss factor of the Ag thin films with the substrates were represented by the combined bending stiffness of the bilayer beam. The vibration response of the base-excited cantilever was measured using an accelerometer and laser Doppler vibrometer (LDV). Vibration transfers were analyzed to obtain dynamic characteristics of the Ag-printed bilayer beam. The substrate affects the reduction of the Ag thin film thickness during the sintering process and surface roughness of the film. The proposed method based on the wave approach allows measurement of the dynamic properties regardless of the ratio of the modulus between the thin film and substrate. View Full-Text
Keywords: inkjet printing; thin-film; dynamic property; flexural wave; cantilever inkjet printing; thin-film; dynamic property; flexural wave; cantilever
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Kim, D.; Kwak, Y.; Park, J. Effect of Substrates on the Dynamic Properties of Inkjet-Printed Ag Thin Films. Appl. Sci. 2018, 8, 195.

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