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Published on: October 21, 2013
Research on microchannel fabrication in UV curable resin using combined beam processing
Yaofei Ma1,2, Shufeng Sun3,4, Jin Wang5,6
1Discipline Innovation and Wisdom Introduction Base of High-end Laser Intelligent Manufacturing Technology and Equipment, school of Mechanical and Automotive Engineering, Qingdao University of Technology, Qingdao, 266520, China.
This study introduces a novel holographic combined femtosecond laser beam technique for microfluidic device fabrication. The method achieves superior microchannel surface quality and processing efficiency compared to traditional laser methods.
Area of Science:
- Microfluidics
- Laser Machining
- Holography
Background:
- Traditional microchannel fabrication methods face limitations in precision and flexibility.
- Femtosecond laser processing offers potential but requires optimization for microfluidic applications.
Purpose of the Study:
- To develop a novel processing technique for microfluidic devices using a holographic combined femtosecond laser beam.
- To achieve high-precision, multi-size microchannel fabrication with improved surface quality and efficiency.
Main Methods:
- A holographic combined femtosecond laser beam was employed, with hologram phase and topology controlled by a spatial light modulator (SLM).
- A blazed grating was used to combine zero-order light and a first-order Bessel beam for precise processing.
- The technique was applied to fabricate microchannels in curable resin.
Main Results:
- The combined beam processing significantly reduced bottom surface roughness (Ra) to 0.128 μm, a 2.8-2.9x improvement over Gaussian and Bessel beams.
- Material Removal Rate (MRR) increased to 6786.362 μm³/s, a 7.7x and 1.9x improvement, respectively.
- Microchannel width and depth were precisely controlled by adjusting hologram parameters (phase value and topological charge).
Conclusions:
- The holographic combined beam method enables high-quality, efficient, and flexible fabrication of microfluidic devices.
- This technique produces smooth microchannel surfaces, eliminating the need for post-processing.
- It offers a promising alternative for advanced microfluidic device manufacturing.
