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An Ultra-Micro-Volume Adhesive Transfer Method and Its Application in fL-pL-Level Adhesive Distribution
Huifang Liu1, Xi Chen1, Shuqing Wang2
1School of Mechanical Engineering, Shenyang University of Technology, Shenyang 110870, China.
Micromachines
|May 28, 2022
Summary
This study introduces a novel adhesive transfer method for ultra-micro-precision dispensing, achieving femtoliter (fL) to picoliter (pL) volumes crucial for micro-assembly manufacturing. The technique demonstrates high accuracy and enables microporous encapsulation with minimal droplet deviation.
Area of Science:
- Materials Science
- Mechanical Engineering
- Nanotechnology
Background:
- Micro- and nanometer scale manufacturing demands advanced ultra-micro-precision dispensing technologies.
- Colloid viscosity and surface tension significantly impact dispensing processes at micro- and nanometer scales.
- Existing methods struggle to meet the precision requirements for encapsulation, connection, and assembly.
Purpose of the Study:
- To develop and validate a novel adhesive transfer method for ultra-micro-precision dispensing.
- To establish a mathematical model for predicting droplet volume in fL-pL levels.
- To analyze factors influencing adhesive transfer and optimize the dispensing process for high-performance manufacturing.
Main Methods:
- Development of a mathematical model for initial and transfer droplet volumes.
- Verification of the theoretical model using 3D scanning.
- Single-factor experiments to analyze droplet volume, stay time, distance, and stretching speed.
- Continuous automatic dispensing experiments with trajectory planning.
- Analysis of droplet size, appearance quality, and position accuracy.
Main Results:
- The adhesive transfer method achieves fL-pL level dispensing.
- Theoretical model for transfer droplet volume was experimentally verified.
- Systematic analysis revealed relationships between droplet volume and key experimental parameters.
- Average relative deviation in transfer droplet lattice position was 6.2%.
- Minimum transfer droplet radius of 11.7 μm and volume of 573.3 fL were achieved.
- Successful realization of microporous encapsulation using the developed ultra-micro-dispensing method.
Conclusions:
- The developed ultra-micro-dispensing method effectively addresses the need for high-precision adhesive transfer.
- The study provides a validated model and experimental insights for controlling fL-pL droplet volumes.
- This technology enables advanced micro- and nanometer scale manufacturing applications, including microporous encapsulation.
