Journal of Sensor Science and Technology (센서학회지)

The Korean Sensors Society (한국센서학회)
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Facile Fabrication of Micro-scale Photomask and Microfluidic Channel Mold for Sensor Applications Using a Heat-shrink Polymer

  • Sung-Youp Lee (Department of Physics, Kyungpook National Unversity) ;
  • Kiwon Yang (Department of Physics, Kyungpook National Unversity) ;
  • Jong-Goo Bhak (Department of Physics, Kyungpook National Unversity) ;
  • Young-Soo Sohn (Biomedical Engineering, Daegu Catholic Unversity)
  • Received : 2023.09.08
  • Accepted : 2023.09.25
  • Published : 2023.09.30
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Abstract

In this study, a prototype micro-scale photomask and microfluidic channel mold were fabricated using the thermal shrinkage of the polymer. A polystyrene (PS) sheet was used as the heat-shrink polymer, and the patterns of the photomask and microchannel are interdigitated electrodes. Patterns were formed on the PS sheets using a commercial laser printer. The contraction ratio of the PS sheet was approximately 60% at a temperature of 150 ℃, and the transmittance was reduced by approximately 0% at a wavelength of 365 nm. The microfluidic channel had a round shape. The proposed technique is simple, facile, and inexpensive for fabricating a micro-scale photomask and microfluidic channel mold and does not involve the use of any harmful materials. Thus, this technique is well-suited for fabricating diverse micro-scale patterns and channels for prototype devices, including sensors.

Keywords

Acknowledgement

This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (NRF-2019R1I1A1A01059259).

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