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Open AccessArticle

Microlens Fabrication by Replica Molding of Electro-Hydrodynamic Printing Liquid Mold

by Feiyu Fang 1,2,3,†, Xulei Tao 1,2,3,†, Xun Chen 1,2,*, Han Wang 1,2,3,*, Peixuan Wu 1,2, Jiarong Zhang 1,2, Jun Zeng 1,2, Zimin Zhu 1,2 and Zhen Liu 4,*
1
State Key Laboratory of Precision Electronic Manufacturing Technology and Equipment, School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou 510006, China
2
Guangdong Provincial Key Laboratory of Micro-Nano Manufacturing Technology and Equipment, School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou 510006, China
3
Guangdong Provincial Jihua Laboratory, Foshan 528000, China
4
Department of Physics and Engineering, Frostburg State University, Frostburg, MD 21532, USA
*
Authors to whom correspondence should be addressed.
These authors contributed equally to this work.
Micromachines 2020, 11(2), 161; https://doi.org/10.3390/mi11020161
Received: 11 December 2019 / Revised: 10 January 2020 / Accepted: 23 January 2020 / Published: 3 February 2020
In this paper, we synergistically combine electrohydrodynamic (EHD) printing and replica molding for the fabrication of microlenses. Glycerol solution microdroplets was sprayed onto the ITO glass to form liquid mold by an EHD printing process. The liquid mold is used as a master to fabricate a polydimethylsiloxane (PDMS) mold. Finally, the desired micro-optical device can be fabricated on any substrate using a PDMS soft lithography mold. We demonstrate our strategy by generating microlenses of photocurable polymers and by characterizing their optical properties. It is a new method to rapidly and cost-effectively fabricate molds with small diameters by exploiting the advantages of EHD printing, while maintaining the parallel nature of soft-lithography.
Keywords: microlenses; replica molding; electrohydrodynamic printing; soft lithography microlenses; replica molding; electrohydrodynamic printing; soft lithography
MDPI and ACS Style

Fang, F.; Tao, X.; Chen, X.; Wang, H.; Wu, P.; Zhang, J.; Zeng, J.; Zhu, Z.; Liu, Z. Microlens Fabrication by Replica Molding of Electro-Hydrodynamic Printing Liquid Mold. Micromachines 2020, 11, 161.

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