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Journal Article Fabrication of Cu Wiring Touch Sensor via Laser Sintering of Cu Nano/Microparticle Paste on 3D-Printed Substrate
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Authors
Hyeon-Sik Ahn, Ae-Sun Oh, Dong-Hwan Kim, Yoonseuk Choi, Kyung-Hyun Kim, Hyun-Cheol Bae
Issue Date
2021-01
Citation
Advanced Engineering Materials, v.23, no.1, pp.1-9
ISSN
1438-1656
Publisher
Wiley
Language
English
Type
Journal Article
DOI
https://dx.doi.org/10.1002/adem.202000688
Project Code
19VU1700, Development of self-reliance platform in defense advanced semiconductor materials and components for weapon system, Jong-Won Lim
Abstract
This study investigates the applications of 3D printing technology in the wiring process used in the field of electronic packaging. A Cu wiring process is developed to replace the expensive Ag-based alternative primarily used in commercial 3D electronic circuit printing as per industry standards. The substrates needed for our experiments are developed using a 3D printer assembled prior to the research, through which poly-ether-ether-ketone (PEEK) proves to be a high-strength, high heat-resistance material capable of undergoing the packaging process. The Cu wiring process is performed via laser sintering in ambient condition using a Cu micro/nanoparticle paste. Adopting this method minimizes the cost and duration of the process without relying on inert atmosphere generation. The optimum laser sintering condition for the Cu paste is found to be two consecutive scans at 20 W. Energy dispersive X-ray spectroscopy (EDS) measurements show that the oxidation of the surface is about 1.35%, and further oxidation is prevented through epoxy molding. The touch sensor by Cu wiring module operate optimally even a month after its manufacture. 3D printing technology proves to be capable of replacing the wiring process used for electronic packaging.
KSP Keywords
3D Printing Technology, 3D printed, 3D printer, Cu paste, Electronic circuit, Heat-resistance, High-strength, Industry standard, Poly-ether-ether-ketone, Sintering condition, Sintering of Cu