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Plastic masters-rigid templates for soft lithography.

Salil P Desai1, Dennis M Freeman, Joel Voldman

  • 1Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, 77 Massachusetts Ave, Cambridge, MA 02139, USA.

Lab on a Chip
|May 22, 2009
PubMed
Summary
This summary is machine-generated.

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We developed a cost-effective method to create plastic master molds for soft lithography using PDMS devices. This technique simplifies microfluidic device fabrication without cleanroom facilities.

Area of Science:

  • Materials Science
  • Microfluidics
  • Nanotechnology

Background:

  • Traditional silicon masters for soft lithography are expensive and require cleanroom facilities.
  • There is a need for cost-effective and accessible methods for fabricating master molds for microfluidic devices.
  • Polydimethylsiloxane (PDMS) is a common material for microfluidic devices but master fabrication remains a bottleneck.

Purpose of the Study:

  • To demonstrate a simple, cost-effective process for fabricating rigid plastic master molds directly from PDMS devices.
  • To enable the scalable production of microfluidic devices without relying on cleanroom infrastructure.
  • To integrate features like fluidic ports directly into the master molds during fabrication.

Main Methods:

  • Fabrication of plastic masters (PMs) using a novel process directly from existing PDMS devices.

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  • Utilizing plastics micromolding to create both single and dual-layer plastic structures.
  • Characterization of the fidelity and performance of the fabricated plastic masters.

    • Main Results:

    • Successfully demonstrated the fabrication of rigid plastic master molds from PDMS devices.
    • Achieved high-fidelity molding for both single and dual-layer plastic structures.
    • Integrated world-to-chip connections and robust fluidic ports directly into the master molds.

    Conclusions:

    • Plastic masters (PMs) offer a cost-effective and accessible alternative to silicon masters for soft lithography.
    • The demonstrated technique simplifies the fabrication of microfluidic devices and enables scaling-up production.
    • PMs facilitate the creation of microfluidic devices with integrated, robust fluidic interfaces.