Stabilizing meniscus shape to improve pattern uniformity in Drop-on-demand EHD inkjet printing using visual feedback

Author

Nguyen, Trung Kien ; Vu Dat Nguyen ; Byun, Doyoung ; Park, Jungkeun

Author_Institution

Dept. of Aerosp. Inf. Eng., KonKuk Univ., Seoul, South Korea

fYear

2012

fDate

17-21 Oct. 2012

Firstpage

392

Lastpage

394

Abstract

This paper presents a method for Electrohydrodynamic (EHD) printing to improve the uniformity of the patterns by stabilizing the meniscus shape of liquid using a visual feedback algorithm. The applied voltage between the nozzle and substrate of EHD inkjet printing is controlled to prevent meniscus from fluctuating during its ejection. The meniscus shape is captured by a CCD camera and analyzed by a meniscus detection algorithm to evaluate its shape and jetting status that are required to implement feedback control. The experiment results show that the meniscus during EHD printing of Ethanol with feedback is much more stabilized compared with the case of open-looped jetting.

Keywords

CCD image sensors; electrohydrodynamics; feedback; ink jet printing; nozzles; CCD camera; drop-on-demand EHD inkjet printing; electrohydrodynamic printing; feedback control; jetting status; meniscus detection algorithm; open-looped jetting; pattern uniformity; stabilizing meniscus shape; visual feedback algorithm; Cameras; Liquids; Printing; Shape; Substrates; Visualization; Voltage control; Electrohydrodynamic printing; meniscus shape stabilization; pattern quality improvement;

fLanguage

English

Publisher

ieee

Conference_Titel

Control, Automation and Systems (ICCAS), 2012 12th International Conference on

Conference_Location

JeJu Island

Print_ISBN

978-1-4673-2247-8

Type

conf

Filename

6393469