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Stability Analysis of Printed Liquid Elbows.
Kuan-Ming Huang1, Tsung-Yen Tsou1, Chia-Wei Chang1
1Department of Chemical Engineering, National Taiwan University , Taipei, Taiwan 10617.
Langmuir : the ACS Journal of Surfaces and Colloids
|December 15, 2016
Summary
Researchers developed a model to prevent liquid bulges in printed patterns. Controlling liquid thickness stabilizes printed lines, crucial for precision in printed electronics.
Area of Science:
- Materials Science
- Fluid Dynamics
- Surface Chemistry
Background:
- Liquid patterns are essential for printed electronics.
- Controlling liquid behavior during deposition is challenging.
- Bulge formation in liquid patterns can reduce device fidelity.
Purpose of the Study:
- To develop a theoretical model for liquid elbow pattern stability.
- To investigate factors influencing bulge formation in printed liquid lines.
- To establish guidelines for printing stable liquid patterns.
Main Methods:
- Theoretical modeling of liquid stability.
- Experimental validation using ethylene glycol on polyethylene terephthalate (PET).
- Surface energy analysis to explain bulge formation.
Main Results:
- Capillary pressure drives liquid into concave elbow corners, causing bulges.
- Bulge formation is angle-dependent, disappearing for angles >90°.
- A stability diagram was created to identify stable printing regimes.
Conclusions:
- The developed model accurately predicts bulge size and stability.
- Controlling liquid thickness enables printing of bulge-free elbow lines.
- The findings offer practical guidance for high-fidelity printed electronic applications.
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