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Conceptual Design of Industrial Inkjet Head for Micro Patterning on Printed Circuit Boards

[+] Author Affiliations
Changsung Sean Kim, Sung-Jun Park, Wonchul Shim, Young-Jae Kim, Jung Hoon Park, Chang-Sung Park, Youngseuck Yoo

Samsung Electro-Mechanics Company, Ltd., Suwon, South Korea

Paper No. ICNMM2007-30083, pp. 543-550; 8 pages
doi:10.1115/ICNMM2007-30083
From:
  • ASME 2007 5th International Conference on Nanochannels, Microchannels, and Minichannels
  • ASME 5th International Conference on Nanochannels, Microchannels, and Minichannels
  • Puebla, Mexico, June 18–20, 2007
  • Conference Sponsors: Nanotechnology Institute
  • ISBN: 0-7918-4272-X | eISBN: 0-7918-3800-5
  • Copyright © 2007 by ASME

abstract

A conceptual design using computational fluid dynamics and experimental fabrication has been performed to develop an industrial inkjet head for micro-patterning on printed circuit boards. The measured displacement waveform from piezoelectric actuator by Laser Doppler Vibrometer was used as input data for the three-dimensional flow solver to simulate the droplet formation. The mechanism of droplet ejection from piezoelectric-type inkjet heads was investigated by simulating two-phase flows of the air and metal inks. As a preliminary approach, liquid metal jetting phenomena are identified by simulating droplet ejection, droplet formation, and wetting on the substrate in a consequent manner. Parametric studies are followed by the design optimization process to deduce key factors to inkjet head performance: nozzle geometry, droplet size, ejecting speed, ejecting frequency, and ink viscosity. The present design tool based on two-phase flow solver and experimental measurements has shown its promising applicability to various concept designs of industrial inkjet system for micro-patterning on electronic chips and boards.

Copyright © 2007 by ASME

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