CONCLUSIONSIn this study, the fabri

CONCLUSIONSIn this study, the fabrication process for a circular microchannel with a smooth surface was proposed and demonstrated by microinjection molding of plastic microfluidic chip including the circular microchannel array.The present method utilized the DXRL process to manufacture the precise micromold,which was employed in a mass replication of the plastic plates having the open circular microchannel array.By bonding two identical microinjection-molded plates,the microfluidic chip prototype with the circular microchannel array was successfully fabricated. Through the surface observations and the profile measurement, the replicated microchannel showed a smooth surface as well as a dimensional accuracy. Also, a performance of the fabricated prototype was verified from the simple microfluidic feasibility test, showing no leakage of the working fluid.