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

Abstract

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.

Inkjet printing quality improvement research progress: A review

“…In the investigation of droplet spreading characteristics, Cui Xinyu observed that the roughness of the substrate predominantly influences the retraction degree and spreading speed of liquid droplets after spreading [ 38 ]. While measuring the dynamic characteristics of inkjet-printed Ag thin films on flexible substrates, Kim D et al discovered that the substrate influences the thickness and surface roughness of Ag films during the sintering process [ 39 ]. Iftimi L. D et al observed that when printing pharmaceuticals, using edible solid foam as a substrate led to improved printing results [ 40 ].…”

Special Issue on Printed Electronics 2017

“…They also found the interlacing overprinting procedure is more advantageous to fabricate thick and narrow nanosilver lines on a hydrophobic substrate. Kim et al conducted measurement of the dynamic properties of inkjet-printed Ag thin films on various substrates such as polyimide, silicon wafer and glass using flexural wave propagation [2]. They fabricated beam-shaped Ag-printed substrates using pico-second laser cutting and measured Young's modulus and loss factor of the Ag thin films using laser Doppler vibrometer without any damage to the thin films.…”