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Research Paper

Applied Science and Convergence Technology 2020; 29(5): 103-107

Published online September 30, 2020


Copyright © The Korean Vacuum Society.

Oxidation Stability of Conductive Copper Paste Prepared through Electron Beam Irradiation

Ji Hyun Parka , Chang Woo Kimb , c , * , and Byung Cheol Leed , *

aResearch and Development Institute, Seoul Radiology Services Co., Ltd., Chungcheongbuk-do 27733, Republic of Korea
bDepartment of Convergence Engineering for Smart and Green Technology, Pukyong National University, Busan 48513, Republic of Korea
cDepartment of Graphic Arts Information Engineering, Pukyong National University, Busan 48513, Republic of Korea
dUNISCAN. Co., Ltd., Seoul 05836, Republic of Korea

Correspondence to:E-mail: kimcw@pknu.ac.kr, bclee@uniscan.co.kr

Received: September 1, 2020; Revised: September 16, 2020; Accepted: September 28, 2020

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


For producing printed electronics, Cu is an effective material as it overcomes the limitations of traditional noble metals in terms of cost and availability. Hence, this work involved developing a synthesis method for conductive pastes used in printed electronics with electron beam (e-beam) irradiation. Cu nanoparticles with high oxidation stability were prepared by adjusting the absorbed dose of e-beam irradiation. The high stable Cu nanoparticles, even though exposure to air for 75 days, were used for preparing conductive ink pastes. The electrical conductivity of the Cu conductive pastes was studied under different sintering conditions. Among the conductive pastes coated on glass substrates under various heat treatment conditions, the paste prepared under the formic acid atmosphere formed a porous, thin film with well-connected particles. Further, we observed that sheet resistance increased as the Cu2O volume fraction and crystalline domain size increased. Thus, e-beam irradiation is a suitable process for mass production of conductive nanoparticles owing to its simplicity and fast reaction time.

Keywords: Electron beam irradiation, Metal conductive paste, Printed electronics

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