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http://dx.doi.org/10.14775/ksmpe.2021.20.04.106

A Study on Polycarbonate Microfabrication Using a Pneumatic Hot Press  

Yeo, Changyeong (School of Mechanical Convergence Engineering, KYUNGNAM UNIV)
Park, Taehyun (School of Mechanical Engineering, KYUNGNAM UNIV.)
Publication Information
Journal of the Korean Society of Manufacturing Process Engineers / v.20, no.4, 2021 , pp. 106-112 More about this Journal
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.
Keywords
Microfluidic Devices; Micro Polymer Fabrication; Pneumatic Hot Press Machine; Polycarbonate;
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