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Development of Dispenser System with Electrohydrodynamic and Voice Coil Motor for White Light Emitting Diode
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 Title & Authors
Development of Dispenser System with Electrohydrodynamic and Voice Coil Motor for White Light Emitting Diode
Kang, Dong-Seong; Kim, Ki-Beom; Ha, Seok-Jae; Cho, Myeong-Woo; Lee, Woo-Jung;
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LED(Light Emitting Diode) is used in various filed like a display because of low power consuming, long life span, high brightness, rapid response time and environmental-friendly characteristic. General fabrication method is combination blue light LED chip with yellow fluorescent substance. Because this way is suitable for industry field in terms of convenience, economic, efficiency. In white light LED packaging process, encapsulation process that is dispensing fluorescent substance with silicon to blue light LED chip is most important. So, in this paper we develop EHD pump system using voice coil motor and electrostatic pump for dispensing fluorescent substance. For these things we conduct basic test about liquid surface profiles by voltage and process time. Through this data we decide optimal process condition and verify the optimal condition using design of experiment method. And to confirm uniformity of the condition, we conduct repeat dispensing test.
LED(Light Emitting Diode);Dispensing process;EHD(Electro-hydrodynamics);VCM(Voice Coil Motor);Encapsulation materials;
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J.S. Kim, J. R. Rye, "Process development for reproduction J. L. Bassani, 1977, Yield characterization of metals with transversely isotropic plastic prop-erties, Int. J. Mech. Sci., Vol. 19, pp. 651-656, 2013.

S. H. Kim, "Screw pump for dispensing LED phosphor wear characteristics", Master of Science, Inha University pp. 6-11. 2011.

S. J. Ha, J. S. Kim, M. W. Cho, J. M. Choi, "Measurement System for Phosphor Dispensing Shape of LED Chip Package Using Machine Vision", Academia-Industrial cooperation Soc., Vol. 14, No. 5, pp. 2113-2120, 2013. DOI: crossref(new window)

D. G. Kim, S.R. Kang, K. C. Lee, "Fabrication of the Emission-Adaptive Phosphor Conformal Coating Layer for White LEDs" The Korean Society For Technology of Plasticity 11th symposium. pp. 80, 2014.

K. S. Nam, "White LED spectrum measurement & CT.CRI calculation & substitution scheme", Master of Science, Chungnam national university, pp12-52, 2002.

A. Jaworek and A. Krupa, "Classification of the modes of EHD spraying", Journal of Aerosol Science, Vol. 30, No. 7, pp. 873-893, 1999. DOI: crossref(new window)

J. B. Ko, "Development of Electrostatic Inkjet Head for Printed Electronics", Major of Electronic Engineering, Master of Science, Jeju National University, 2010.

J. H. Kim, "Electrohydrodynamic drop-on-demand patterning in the pulsed cone-jet mode" KAIST, pp. 12-23, 2008.

K.S. Kwon, J. H Myong, "Experimental Study on the Relationship between Ink Droplet Volume and Inkjet Waveform", Journal of the korean society for precision engineering, Vol. 26, No.4, pp. 141-145, 2009.

J. B. Ko, "Development of Electrostatic Inkjet Head for Printed Electronics, Major of Electronic Engineering", Master of Science, Jeju National University, 2010.

D. K. Kang, "Experimental Study on Solar Cell Electrode via Electrohydrodynamic (EHD) Inkjet Printing", Master of Science, Korea University, 2012.

S. W. Kim, Y. J. Yang, H. W. Dang, B. S. Yang, H. B. Kim, K. H. Choi, "A Study of High Viscosity Phosphor Dispensing for an Electrostatic Printing System ", Transactions of Materials Processing, Vol.24, No.2, pp. 83-88, 2015. DOI: crossref(new window)