Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
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Fabrication and Characterization of Polymer Microlens using Solvent-vapor-assisted Reflow

솔벤트 증기처리 Reflow를 이용한 폴리머 마이크로 렌즈 제작 및 특성고찰

  • 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)
  • 양승우 (서울과학기술대학교 기계시스템디자인공학과) ;
  • 김신형 (서울과학기술대학교 기계시스템디자인공학과) ;
  • 김보현 (숭실대학교 기계공학과) ;
  • 조영학 (서울과학기술대학교 기계시스템디자인공학과)
  • Received : 2014.11.29
  • Accepted : 2015.02.09
  • Published : 2015.03.01
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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.

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References

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