Replication Quality of Flow-Through Microfilters in Microfluidic Lab-on-a-Chip for Blood Typing by Microinjection Molding

摘要

In-the present study, replication of flow-through microfilters in the newly developed mi-crofluidic lab-on-a-chip for blood typing by microinjection molding process was experi-mentally investigated. As a precise replication of the microfilters was required in order to effectively filter out agglutinated red blood cells, the effects of important processing conditions on the replication of the flow-through microfilters were investigated. By using a mold insert fabricated by a nickel electroplating process and a newly designed mold base, microinjection molding experiments were carried out. A three-dimensional solid model reconstruction method was proposed with the help of specific features character-izing the geometry of microfilters, and accordingly, the feature values of the replicated microfilters were measured by a noncontact optical measurement system. So recon-structed solid modeling result was then used to investigate the effects of various process-ing conditions, such as a flow rate, a mold temperature, and a packing pressure. Amongst the processing conditions investigated in the present study, the flow rate was found to be the most important one.