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Micromachines 2017, 8(5), 153; doi:10.3390/mi8050153

Large-Area Compatible Laser Sintering Schemes with a Spatially Extended Focused Beam

1
Applied Nano and Thermal Science Lab, Department of Mechanical Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-742, Korea
2
Department of Mechanical Engineering, Hanyang University, 55 Hanyangdaehak-ro, Sangnok-gu, Ansan Gyeonggi-do 15588, Korea
3
Department of Mechanical Engineering, Ajou University, San 5, Woncheon-Dong, Yeongtong-Gu, Suwon 16499, Korea
4
Novel Applied Nano Optics (NANO) Lab, Department of Physics, Kyungpook National University, 80 Daehak-ro, Bukgu, Daegu 41566, Korea
These authors contributed equally to this work.
*
Authors to whom correspondence should be addressed.
Academic Editor: Zhigang Wu
Received: 3 April 2017 / Revised: 30 April 2017 / Accepted: 3 May 2017 / Published: 11 May 2017
(This article belongs to the Special Issue Flexible and Stretchable Electronics)
View Full-Text   |   Download PDF [3679 KB, uploaded 11 May 2017]   |  

Abstract

Selective laser sintering enables the facile production of metal nanoparticle-based conductive layers on flexible substrates, but its application towards large-area electronics has remained questionable due to the limited throughput of the laser process that originates from the direct writing nature. In this study, modified optical schemes are introduced for the fabrication of (1) a densely patterned conductive layer and (2) a thin-film conductive layer without any patterns. In detail, a focusing lens is substituted by a micro lens array or a cylindrical lens to generate multiple beamlets or an extended focal line. The modified optical settings are found to be advantageous for the creation of repetitive conducting patterns or areal sintering of the silver nanoparticle ink layer. It is further confirmed that these optical schemes are equally compatible with plastic substrates for its application towards large-area flexible electronics. View Full-Text
Keywords: laser sintering; metal nanoparticle; micro lens array; cylindrical lens; flexible electrode laser sintering; metal nanoparticle; micro lens array; cylindrical lens; flexible electrode
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Lee, H.; Kwon, J.; Shin, W.S.; Kim, H.R.; Shin, J.; Cho, H.; Han, S.; Yeo, J.; Hong, S. Large-Area Compatible Laser Sintering Schemes with a Spatially Extended Focused Beam. Micromachines 2017, 8, 153.

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