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An Experimental Study of Onset Condition for Electrohydrodynamic Jetting

[+] Author Affiliations
Hyojun Kim, Junyoung Song, Jaeik Jeong, Jaewon Chung

Korea University, Seoul, Korea

Paper No. InterPACK2009-89387, pp. 183-186; 4 pages
doi:10.1115/InterPACK2009-89387
From:
  • ASME 2009 InterPACK Conference collocated with the ASME 2009 Summer Heat Transfer Conference and the ASME 2009 3rd International Conference on Energy Sustainability
  • ASME 2009 InterPACK Conference, Volume 1
  • San Francisco, California, USA, July 19–23, 2009
  • Conference Sponsors: Electronic and Photonic Packaging Division
  • ISBN: 978-0-7918-4359-8 | eISBN: 978-0-7918-3851-8
  • Copyright © 2009 by ASME

abstract

Electrohydrodynamic (EHD) printing has recently received considerable attention for its potential of high resolution printing. In typical EHD printing, at the constant flow rate condition, the electric field applied between the nozzle and the electrically conductive substrate induces cone jet, so that a droplet smaller than nozzle diameter can be ejected. However, for real application, fluid should be supplied to the nozzle by the constant pressure for multi-nozzle EHD. In this work, at the constant back pressure condition in the reservoir, EHD jetting phenomena were observed changing bias voltage. In addition, the onset voltage for EHD jetting was measured changing glass capillary nozzle diameter (outer diameter: 23, 42μm), hydrostatic back pressure head on the reservoir and the distance between the nozzle and the bottom electrode.

Copyright © 2009 by ASME

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