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Laser-induced Forward Transfer of Ag Nanopaste
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New perspectives for direct PDMS microfabrication using a CD-DVD laser.

M Hautefeuille1, L Cabriales, R Pimentel-Domínguez

  • 1Facultad de Ciencias, Universidad Nacional Autónoma de México, Avenida Universidad 3000, Circuito Exterior S/N, Ciudad Universitaria, Delegación Coyoacán, C.P. 04510, D. F. México, México. mathieu_h@ciencias.unam.mx.

Lab on a Chip
|November 1, 2013
PubMed
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Researchers developed a low-cost method for microfabrication using a CD/DVD laser to etch poly-dimethylsiloxane (PDMS). This technique enables rapid prototyping and creates high-resolution patterns with unique properties.

Area of Science:

  • Materials Science
  • Microfabrication
  • Polymer Engineering

Background:

  • Poly-dimethylsiloxane (PDMS) is a versatile polymer widely used in microfluidics and rapid prototyping.
  • Traditional methods for PDMS microfabrication often require expensive, high-power lasers.
  • Developing cost-effective and accessible fabrication techniques is crucial for broader research and development.

Purpose of the Study:

  • To present a simple, inexpensive alternative to high-power lasers for direct PDMS microchannel fabrication.
  • To demonstrate rapid prototyping capabilities using a low-power laser system.
  • To investigate the phenomenon of laser-induced incandescence for high-resolution PDMS patterning.

Main Methods:

  • Utilizing a commercial, low-power CD/DVD infrared laser.

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  • Incorporating carbon micro-cluster additives to enhance laser absorption in PDMS.
  • Precisely controlling laser conditions to induce localized PDMS combustion and etching.
  • Automated control of laser parameters for consistent pattern generation.

    • Main Results:

    • Achieved direct fabrication of microchannels and high-resolution micropatterns in PDMS.
    • Demonstrated PDMS combustion via localized heating of carbon additives.
    • Observed formation of in situ nanodomains, local fluorescence, and waveguide patterns.
    • Properties induced are comparable to those achieved with much higher energy lasers.

    Conclusions:

    • The presented method offers a cost-effective and simple alternative for PDMS microfabrication.
    • Low-power laser-induced incandescence is effective for creating complex microstructures in PDMS.
    • This technique facilitates rapid prototyping and opens possibilities for novel PDMS-based devices.