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Proceedings Paper

Design of a gap-adjustable inkjet printing system for dense and high-temperature-melting materials
Author(s): Taik-Min Lee; Jeong-Dai Jo; Hyun-Sub Kim; Young-Bok Ham; So-Nam Yoon; Kwang-Young Kim
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Paper Abstract

Inkjet printing technology has begun to get into the spotlight in many ways due to the superior price competitiveness to existent semi-conductor process. This paper will introduce a newly devised gap adjustable inkjet printing system for dense and high-temperature-melting materials such as metal paste. The design on the gap adjustable inkjet printing system is discussed in detail for precise control of the size and spacing of the injected metal droplets. Analytic optimization and effects of design parameters are examined and computational work using the axis-symmetric, incompressible, multiphase equations is carried out to predict characteristics of the metal paste jetting and to design optimal micro nozzle prototype. From this analysis, droplet trajectory visualization and velocity vector of ejected droplet have been investigated to characterize the relationship between inlet condition and nozzle profile. Finally, the designed gap adjustable inkjet printing system is fabricated and its peformances are tested according to the change of various gap distances and the droplet characteristics are measured in the view point of precise droplet controllability and productivity.

Paper Details

Date Published: 31 January 2005
PDF: 6 pages
Proc. SPIE 5624, Semiconductor and Organic Optoelectronic Materials and Devices, (31 January 2005); doi: 10.1117/12.575964
Show Author Affiliations
Taik-Min Lee, Korea Institute of Machinery and Materials (South Korea)
Jeong-Dai Jo, Korea Institute of Machinery and Materials (South Korea)
Hyun-Sub Kim, Korea Institute of Machinery and Materials (South Korea)
Young-Bok Ham, Korea Institute of Machinery and Materials (South Korea)
So-Nam Yoon, Korea Institute of Machinery and Materials (South Korea)
Kwang-Young Kim, Korea Institute of Machinery and Materials (South Korea)


Published in SPIE Proceedings Vol. 5624:
Semiconductor and Organic Optoelectronic Materials and Devices
Chung-En Zah; Yi Luo; Shinji Tsuji, Editor(s)

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