Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
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Development of Measurement System for Contact Angle and Evaporation Characteristics of a Micro-droplet on a Substrate

미소 액적의 접촉각 및 건조 특성 측정 시스템 개발

  • Kwon, Kye-Si (Department of Mechanical Engineering, Soonchunhyang Univ.) ;
  • An, Seung-Hyun (Department of Mechanical Engineering, Soonchunhyang Univ.) ;
  • Jang, Min Hyuck (Department of Mechanical Engineering, Soonchunhyang Univ.)
  • 권계시 (순천향대학교 기계공학과) ;
  • 안승현 (순천향대학교 기계공학과) ;
  • 장민혁 (순천향대학교 기계공학과)
  • Received : 2012.11.05
  • Accepted : 2012.12.10
  • Published : 2013.04.01
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Abstract

We developed inkjet based measurement system for micro-droplet behavior on a substrate. By using the inkjet dispenser, a droplet, which is as small as few pico-liter in volume, can be jetted and the amount can be controlled. After jetting, the droplet image on the substrate is acquired from side view camera. Then, droplet profile is extracted to measure droplet volume, contact angle and evaporation characteristics. Also top view image of the droplet is acquired for better understanding of droplet shape. The previous contact angle measurement method has limitations since it mainly measures the ratio of height and contact diameter of droplet on a substrate. Unlike previous measurement system, our proposed method has advantages because various behavior of droplet on substrate can be effectively analyzed by extracting the droplet profile.

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References

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