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Related Experiment Videos

Prototyping of microfluidic devices in poly(dimethylsiloxane) using solid-object printing.

J Cooper McDonald1, Michael L Chabinyc, Steven J Metallo

  • 1Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, USA.

Analytical Chemistry
|May 30, 2002
PubMed
Summary
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Solid-object printing offers a mask-free method for fabricating masters for microfluidic devices. This technique enables rapid, cost-effective production of complex, large-scale poly(dimethylsiloxane) (PDMS) microfluidic devices.

Area of Science:

  • Engineering
  • Materials Science
  • Biotechnology

Background:

  • Traditional photolithography for microfluidic device fabrication has limitations in feature size and complexity.
  • There is a need for alternative methods to produce microfluidic devices with features larger than 250 micrometers.

Purpose of the Study:

  • To evaluate solid-object printing as a mask-free method for fabricating masters for poly(dimethylsiloxane) (PDMS) microfluidic devices.
  • To demonstrate the capability of solid-object printing for producing complex, large-area microfluidic devices.

Main Methods:

  • Masters for microfluidic devices were fabricated using a solid-object printer directly from CAD files.
  • Poly(dimethylsiloxane) (PDMS) replicas were molded against the printed masters to create microfluidic devices.

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  • The method was validated by fabricating devices with multilevel features, tall features, large areas (approx. 150 cm²), and non-intersecting channels.

    • Main Results:

    • Solid-object printing successfully produced masters for microfluidic devices with feature sizes ranging from 250 micrometers to 10 cm.
    • The printing process is mask-free, unattended, and capable of producing complex structures in a single run.
    • Fabricated masters are robust, inexpensive, and can be produced rapidly.
    • Microfluidic devices fabricated using this method demonstrated capabilities for multilevel and tall features, large-area coverage, and complex channel designs.

    Conclusions:

    • Solid-object printing is a viable and advantageous alternative to photolithography for microfluidic device fabrication, especially for features > 250 micrometers.
    • This method allows for rapid, cost-effective, and versatile production of complex microfluidic devices.
    • The technique supports the creation of advanced microfluidic devices with intricate designs and large footprints.