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http://dx.doi.org/10.7736/KSPE.2015.32.3.299

Fabrication and Characterization of Polymer Microlens using Solvent-vapor-assisted Reflow  

Yang, Seung Woo (Department of Mechanical System Design Engineering, Seoul National University of Science & Technology)
Kim, Sin Hyeong (Department of Mechanical System Design Engineering, Seoul National University of Science & Technology)
Kim, Bo Hyun (Department of Mechanical Engineering, Soongsil University)
Cho, Young Hak (Department of Mechanical System Design Engineering, Seoul National University of Science & Technology)
Publication Information
Journal of the Korean Society for Precision Engineering / v.32, no.3, 2015 , pp. 299-305 More about this Journal
Abstract
In this paper, we propose a simple and low-cost fabrication method of polymer microlens using solvent-vapor-assisted reflow (SVAR). Metal molds for replication of polymer were fabricated using micro milling and the cylindrical shape of polymer was imprinted using hot-embossing process. The cylindrical shape of polymer was changed to hemispherical lens shape by SVAR. The characteristics of fabricated microlens were evaluated according to the condition of SVAR such as temperature and time. The focal length of polymer microlens could be controlled more easily in low-temperature and long-time condition than in high-temperature and short-time condition. That is, the level of concentrated light to focal point could be improved through the control of temperature and time. Also, we confirmed that toluene was more appropriate solvent than acetone in fabrication of PMMA polymer microlens using SVAR.
Keywords
Microlens; Hot-embossing; Solvent-vapor-assisted reflow; Light concentrating ratio;
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Times Cited By KSCI : 1  (Citation Analysis)
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