A Study of Inkjet Printed Line Morphology Using Volatile Ink with Non-zero Receding Contact Angle for Conductive Trace Fabrication
Abstract:Inkjet printed lines on a homogeneous solid substrate are studied under the condition that ink evaporation is not negligible and the contact angle exhibits hysteresis with non-zero receding contact angle (NRCA). A new family of line instability is discovered, featured by formation of agglomerations within a line. The agglomeration is explained by a flow that consistently drives a bead on the substrate towards fresh deposited drops due to concentration-induced surface tension gradient. Morphologies of lines printed with multiple layers are also investigated for the purpose of conductive trace fabrication. A non-uniform morphology is observed across a multi-layer line when the line is printed unidirectionally at a low jetting frequency. This non-uniformity is explained by considering interaction between deposited drops and bulk layer. Optimized multiple-pass printing is developed to produce a uniform line morphology while offering excellent printing efficiency and electrical conductivity.
Document Type: Research Article
Publication date: 2013-01-01
For more than 25 years, NIP has been the leading forum for discussion of advances and new directions in non-impact and digital printing technologies. A comprehensive, industry-wide conference, this meeting includes all aspects of the hardware, materials, software, images, and applications associated with digital printing systems, including drop-on-demand ink jet, wide format ink jet, desktop and continuous ink jet, toner-based electrophotographic printers, production digital printing systems, and thermal printing systems, as well as the engineering capability, optimization, and science involved in these fields.
Since 2005, NIP has been held in conjunction with the Digital Fabrication Conference.
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