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An inkjet vision measurement technique for high-frequency jetting
Kye-Si Kwon1, Min-Hyuck Jang1, Ha Yeong Park1
1Department of Mechanical Engineering, Soonchunhyang University 22, Soonchunhyang-Ro, Shinchang, Asan Chungnam 336-745, South Korea.
The Review of Scientific Instruments
|July 3, 2014
Summary
High-frequency inkjet printing for electronics requires precise droplet control. New vision techniques track individual droplets, enabling accurate evaluation of jetting speed and volume for improved printed electronics manufacturing.
Area of Science:
- Materials Science and Engineering
- Manufacturing Technology
- Fluid Dynamics
Background:
- Inkjet technology is crucial for manufacturing printed electronics, with productivity linked to jetting frequency.
- High-frequency jetting can lead to non-uniform printed patterns due to variations in jetting speed and droplet volume.
- Existing vision analysis methods struggle to accurately measure high-frequency jetting due to closely spaced or merged droplets.
Purpose of the Study:
- To develop and present novel vision measurement techniques for evaluating high-frequency inkjet jetting behavior.
- To enable accurate assessment of droplet formation characteristics at increased jetting frequencies.
- To understand the impact of jetting frequency on jetting speed and droplet volume for process optimization.
Main Methods:
- Implementation of vision measurement techniques specifically designed for high-frequency jetting.
- A novel droplet tracking approach to isolate and analyze target droplets, excluding subsequent ones.
- A frequency sweeping method to systematically vary jetting frequency and measure performance metrics.
Main Results:
- The proposed vision method successfully evaluates drop formation in high-frequency jetting.
- The technique effectively excludes subsequent droplets, allowing for precise analysis of individual droplet characteristics.
- The frequency sweeping method provides a comprehensive understanding of how jetting speed and droplet volume change with frequency.
Conclusions:
- The developed vision measurement techniques are effective for evaluating high-frequency inkjet jetting performance.
- Accurate measurement of jetting characteristics is essential for improving the quality and uniformity of printed electronics.
- This research provides a foundation for optimizing inkjet printing processes for enhanced productivity and reliability.

