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Parameter Optimization for High-Resolution Microfluidic Channel Fabrication Using a Commercial Low-Cost MSLA Printer.

Jintao Liu1, Jiadong Ma1, Jaeseon Kim1

  • 1Department of Mechanical Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Republic of Korea.

Micromachines
|February 27, 2026
PubMed
Summary
This summary is machine-generated.

This study optimizes masked stereolithography (MSLA) 3D printing for microfluidic devices. We achieved reliable, clog-free microchannels over 200 µm using standard resins, enabling complex designs.

Keywords:
3D microfluidics3D printingmicrofluidic design rules

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Area of Science:

  • Microfluidics
  • 3D Printing Technologies
  • Materials Science

Background:

  • Vat polymerization 3D printing offers rapid, low-cost microfluidic device fabrication.
  • Challenges exist in achieving high-resolution, clog-free microchannels with commercial resins.

Purpose of the Study:

  • To systematically investigate printing parameters for MSLA 3D printing of microfluidic devices.
  • To establish quantitative fabrication boundaries for microchannel openness and fidelity.
  • To demonstrate fabrication of complex microfluidic structures using optimized parameters.

Main Methods:

  • Systematic investigation of printing parameters: channel orientation, length, layer thickness, exposure time.
  • Utilized a low-cost masked stereolithography (MSLA) printer and commercial resin.
  • Implemented a size-compensated design strategy for complex geometries.

Main Results:

  • Optimized conditions yielded reliable, clog-free microchannels exceeding 200 µm.
  • Achieved fabrication of droplet generator arrays with 400 µm minimum channel width.
  • Maintained internal dimensional deviation below 2.5% for complex designs.

Conclusions:

  • Low-cost MSLA 3D printing is viable for high-fidelity microfluidic channel fabrication.
  • Optimized parameters and design strategies overcome limitations of commercial resins.
  • Provides a scalable, accessible method for microfluidic device production without specialized materials or extensive post-processing.