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Proceedings Article

Rapid fabrication of hot embossing tools using PDMS

[+] Author Affiliations
Jagannathan Narasimhan, Ian Papautsky

Univ. of Cincinnati (USA)

Proc. SPIE 4982, Microfluidics, BioMEMS, and Medical Microsystems, 110 (January 25, 2003); doi:10.1117/12.472737
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From Conference Volume 4982

  • Microfluidics, BioMEMS, and Medical Microsystems
  • Holger Becker; Peter Woias
  • San Jose, CA | January 25, 2003

abstract

In this paper, we present a simple method of fabricating the hot embossing tools using polydimethylsiloxane (PDMS). The tools are then used to fabricate microfluidic systems in polymethylmethacrylate (PMMA) of various aspect ratios. A negative photoepoxy (SU-8) or thick positive (AZ4620) photoresist on silicon is used as a molding template for the casting process to obtain a negative of the desired features in PDMS. The fabrication time of these PDMS tools is typically less and remains the same for realizing low as well as high aspect ratio features. This processing technique was used to fabricate microchannels over a wide range of aspect ratios in PMMA. This approach offers many advantages compared to the conventional methods of fabricating hot embossing tools including rapid processing, reduction in complexity and cost. This technique can also be extended to create orthogonal 3-D microfluidic systems in various thermoplastics.

© (2003) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Jagannathan Narasimhan and Ian Papautsky
"Rapid fabrication of hot embossing tools using PDMS", Proc. SPIE 4982, Microfluidics, BioMEMS, and Medical Microsystems, 110 (January 25, 2003); doi:10.1117/12.472737; http://dx.doi.org/10.1117/12.472737


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