Journal of the Korean Society of Manufacturing Process Engineers (한국기계가공학회지)

The Korean Society of Manufacturing Process Engineers (한국기계가공학회)
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A Study on Polycarbonate Microfabrication Using a Pneumatic Hot Press

공압 핫프레스를 이용한 마이크로 폴리카보네이트 성형에 관한 연구

  • Yeo, Changyeong (School of Mechanical Convergence Engineering, KYUNGNAM UNIV) ;
  • Park, Taehyun (School of Mechanical Engineering, KYUNGNAM UNIV.)
  • 여창영 (경남대학교 기계융합공학부) ;
  • 박태현 (경남대학교 기계공학부)
  • Received : 2021.01.24
  • Accepted : 2021.03.19
  • Published : 2021.04.30
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Abstract

Thermoplastic microfluidic devices are used in BioMEMS for medical and biotechnology applications, such as gene extraction, DNA analysis, and virus detection. In this research, a simple fabrication protocol with a commercially available pneumatic hot press is proposed and demonstrated for polycarbonate microfluidic devices. Microfluidic channels with a width of 200 ㎛ and a height of 10 ㎛ were designed and machined onto a brass plate as a mold insert using a CNC milling machine. The resulting microfluidic channels on the mold insert were assessed and found to have an actual width of 198 ㎛ and a height of 10 ± 0.25 ㎛. The microfluidic channels were replicated on a polycarbonate sheet using the proposed replication technique at 146℃ for 20 minutes under a constant load of 2400 kgf. The devices were then naturally cooled to 100℃ while maintaining the same pressure. It was found that the microchannels were successfully replicated in the polycarbonate, with a width of 198 ㎛ and a height of 10.07 ㎛. The proposed replication technique thus offers the rapid mass production of high-quality microfluidic devices at a low cost with a process that, unlike conventional photolithography systems, does not require expensive equipment.

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