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Materials 2016, 9(8), 621;

A Novel Fabrication Technique for Liquid-Tight Microchannels by Combination of a Paraffin Polymer and a Photo-Curable Silicone Elastomer

Department of Mechanical Engineering, Tokyo Institute of Technology, Tokyo 152-8552, Japan
Authors to whom correspondence should be addressed.
Academic Editor: Roberta Bongiovanni
Received: 16 June 2016 / Revised: 11 July 2016 / Accepted: 25 July 2016 / Published: 27 July 2016
(This article belongs to the Special Issue Materials for Photolithography and 3D Printing)
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The development and growth of microfluidics has been mainly based on various novel fabrication techniques for downsizing and integration of the micro/nano components. Especially, an effective fabrication technique of three-dimensional structures still continues to be strongly required in order to improve device performance, functionality, and device packing density because the conventional lamination-based technique for integrating several two-dimensional components is not enough to satisfy the requirement. Although three-dimensional printers have a high potential for becoming an effective tool to fabricate a three-dimensional microstructure, a leak caused by the roughness of a low-precision structure made by a 3D printer is a critical problem when the microfluidic device is composed of several parts. To build a liquid-tight microchannel on such a low-precision structure, we developed a novel assembly technique in which a paraffin polymer was used as a mold for a microchannel of photo-curable silicone elastomer on a rough surface. The shape and roughness of the molded microchannel was in good agreement with the master pattern. Additionally, the seal performance of the microchannel was demonstrated by an experiment of electrophoresis in the microchannel built on a substrate which has a huge roughness and a joint. View Full-Text
Keywords: microfluidics; microfabrication; paraffin polymer; photo-curable silicone elastomer microfluidics; microfabrication; paraffin polymer; photo-curable silicone elastomer

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Mogi, K.; Sakata, K.; Hashimoto, Y.; Yamamoto, T. A Novel Fabrication Technique for Liquid-Tight Microchannels by Combination of a Paraffin Polymer and a Photo-Curable Silicone Elastomer. Materials 2016, 9, 621.

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