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Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received October 2, 2007
Accepted April 2, 2008

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Screen printing of silver nanoparticle suspension for metal interconnects

Weiwei Yin Dong-Hyun Lee Jaesoo Choi Chinho Park¹ Sung Min Cho^†

Department of Chemical Engineering, Sungkyunkwan University, Suwon 440-746, Korea ¹School of Display & Chemical Engineering, Yeungnam University, Gyeongsan 712-749, Korea

sungmcho@skku.edu

Korean Journal of Chemical Engineering, November 2008, 25(6), 1358-1361(4), 10.1007/s11814-008-0223-y

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Abstract

Silver nanoparticle suspensions were synthesized by chemical reduction method using a formaldehyde reductant. Polyvinyl pyrrolidone (PVP) of two different molecular weights (M.W.=8,000 and 29,000) was used as a stabilizer for the suspensions. PVP of a smaller molecular weight could produce silver suspensions of nanoparticle size around 20 nm. Water-based conductive silver inks with different silver concentrations were prepared and tested_x000D_ for suitability for screen printing. We have successfully printed silver metal lines on glass substrates using a 400 mesh screen-mask with 60wt.% silver ink prepared in this study. Curing at a low temperature of 200 ℃ for an hour was found sufficient to reach the lowest resistivity value with the synthesized ink. For a line with a width and thickness of 0.5 mm and 2.12 μm, respectively, it exhibited a resistivity of 3.3×10^(-5) Ω·cm, which could serve as conducting lines for various electronic applications.

Keywords

Silver Nanoparticle Screen Printing PVP Conductive Ink

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