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Phase Matching of Pressure Wave in a Drop-On-Demand Inkjet Print Head  

Kim, Myong-Ki (한국생산기술연구원 마이크로시스템 팀)
Hwang, Jun-Young (한국생산기술연구원 마이크로시스템 팀)
Lee, Sang-Ho (한국생산기술연구원 마이크로시스템 팀)
Kang, Kyung-Tae (한국생산기술연구원 마이크로시스템 팀)
Kang, Heui-Seok (한국생산기술연구원 마이크로시스템 팀)
Publication Information
Journal of the Korean Society for Precision Engineering / v.25, no.9, 2008 , pp. 116-125 More about this Journal
Abstract
Inkjet printing technology with a drop-on-demand (DOD) inkget head technology has been recognized as one of versatile and low cost manufacturing tools in the electronics industry. Concerned with control of driving signal, however, general strategy to optimize jetting stability has not been understood well, because of the inherent complex multi-physics nature in inkjet phenomena. Motivated by this, present study investigates the effect of driving waveforms of piezoelectric head on jetting characteristics of DOD inkjet system focused on jetting stability with phase matching of pressure waves in the print head. The results show that velocities and volumes of the ink jetted droplets were linear relations with the driving signal's maximum voltage, while periodic behaviors are observed with the driving signal's pulse widths.
Keywords
Inkjet; Driving conditions; Jetting characteristic; Meniscus oscillation; Pressure wave;
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