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High-Resolution DLP 3D Printing for Complex Curved and Thin-Walled Structures at Practical Scale: Archimedes
Chih-Lang Lin1,2, Jun-Ting Liu3, Chow-Shing Shin3
1Center for General Education, Central Taiwan University of Science and Technology, Taichung City 40601, Taiwan.
Micromachines
|July 30, 2025
Summary
We developed a digital light processing-based projection micro-stereolithography (PμSL) system for high-precision 3D printing of microfluidic devices. This method overcomes limitations of other techniques for fabricating intricate microstructures.
Area of Science:
- Microfluidics
- 3D Printing Technologies
- Materials Science
Background:
- 3D printing is crucial for microfluidic fabrication, demanding high precision.
- Light-curing methods like two-photon polymerization (TPP) offer high resolution but have limited volume and high costs.
- Digital light processing (DLP) offers a cost-effective alternative but struggles with intricate structures due to over-curing and adhesion issues.
Purpose of the Study:
- To develop a DLP-based projection micro-stereolithography (PμSL) system for precise microfluidic component fabrication.
- To overcome the limitations of conventional DLP systems in printing high-resolution, intricate structures.
- To provide a practical reference for applying DLP 3D printing in microfluidics.
Main Methods:
- Developed a DLP-based PμSL system with optical reconfiguration.
- Fine-tuned system parameters to address over-curing and interlayer adhesion.
- Fabricated an Archimedes microscrew, a key microfluidic micromixer component, to demonstrate precision.
Main Results:
- The developed PμSL system successfully fabricated precise and intricate microstructures.
- Optimized parameters enabled overcoming common DLP printing limitations for microfluidics.
- Demonstrated the system's capability by fabricating a functional Archimedes microscrew.
Conclusions:
- The PμSL system offers a practical and cost-effective solution for high-precision microfluidic fabrication.
- This approach advances the application of DLP 3D printing for complex microfluidic components.
- The study provides valuable insights for developing advanced microfluidic devices using 3D printing.
