3D 프린팅 몰드를 이용하여 제작된 PDMS 원통형 마이크로 유체 채널

Abstract

This study reports the capillary filling flow in polydimethylsiloxane (PDMS) microchannels with circular crosssection produced by the use of three-dimensionally (3D) printed molds that are unattainable through conventional soft lithography techniques. The casting molds are printed directly from computeraided design (CAD) files by widely used four 3D printers. The PDMS channels with variable channel diameters (ranging from 200 to 1000 μm) in a single device obtained from the different printers are compared in terms of capillary filling. Key parameters affecting the capillary filling, including surface roughness and resolution of the channels, are also characterized depending on the 3D printers.