Date of Award
2013
Degree Type
Thesis
Degree Name
Master of Science in Mechanical Engineering (MSME)
Department
Mechanical Engineering
First Advisor
George T. C. Chiu
Committee Chair
George T. C. Chiu
Committee Member 1
Jeffrey Rhoads
Committee Member 2
Ronald G. Reifenberger
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 hydrodynamic flow that consistently drives a bead on the substrate towards fresh deposited droplets due to concentration-induced surface tension gradient. Morphologies of lines printed with multiple layers are also explored 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 the interaction between deposited droplets and bulk layer. An optimized multiple-pass printing is developed to produce a uniform line morphology while offering excellent printing efficiency and electrical conductivity.
Recommended Citation
Shou, Chenchao, "A Study of Inkjet Printed Line Morphology Using Volatile Ink with Non-zero Receding Contact Angle for Conductive Trace Fabrication" (2013). Open Access Theses. 65.
https://docs.lib.purdue.edu/open_access_theses/65