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Reduction of droplet volume by controlling actuating waveforms in inkjet printing for micro-pattern formation
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences.
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2009 (English)In: Journal of Micromechanics and Microengineering, ISSN 0960-1317, E-ISSN 1361-6439, Vol. 19, no 5, 055010- p.Article in journal (Refereed) Published
Abstract [en]

Inkjet printing has proven to be a promising and flexible process methodology for low cost and drop-on-demand pattern formation in small-scale production of micro-electro-mechanical systems. To optimize the micro-patterns formed by inkjet printing, an accurate control of droplet volume is essential and critical. In this study, an inkjet system with a nozzle driven by a circular piezoelectric element was used to explore the impact of different waveforms on droplet volume. The investigation into this study included the impact of unipolar, bipolar, M-shaped and W-shaped waveforms as well as the effects of their amplitudes and pulse durations. The inkjetting behavior of Newtonian and non-Newtonian fluids under different actuating waveforms was studied in order to obtain a maximum reduction in ejected droplet sizes. An effective reduction of droplet volume in the range of 50-80% was demonstrated. The results of inkjetting PEDOT ink on a polished silicon surface showed that a 50% reduction in line width was achieved.

Place, publisher, year, edition, pages
2009. Vol. 19, no 5, 055010- p.
National Category
Engineering and Technology
URN: urn:nbn:se:uu:diva-129084DOI: 10.1088/0960-1317/19/5/055010ISI: 000265580900020OAI: oai:DiVA.org:uu-129084DiVA: diva2:337558
Available from: 2010-08-06 Created: 2010-08-05 Last updated: 2010-08-06Bibliographically approved

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