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Development of Dispenser System with Electrohydrodynamic and Voice Coil Motor for White Light Emitting Diode

백색 LED 제조를 위한 정전기력과 보이스코일모터를 이용한 디스펜서 시스템 개발

  • Received : 2015.08.20
  • Accepted : 2015.10.08
  • Published : 2015.10.31

Abstract

LED(Light Emitting Diode) is used in various filed like a display because of low power consuming, long life span, high brightness, rapid response time and environmental-friendly characteristic. General fabrication method is combination blue light LED chip with yellow fluorescent substance. Because this way is suitable for industry field in terms of convenience, economic, efficiency. In white light LED packaging process, encapsulation process that is dispensing fluorescent substance with silicon to blue light LED chip is most important. So, in this paper we develop EHD pump system using voice coil motor and electrostatic pump for dispensing fluorescent substance. For these things we conduct basic test about liquid surface profiles by voltage and process time. Through this data we decide optimal process condition and verify the optimal condition using design of experiment method. And to confirm uniformity of the condition, we conduct repeat dispensing test.

Acknowledgement

Grant : 백색 LED 구현을 위한 칩/패키지 형광체 Conformal 코팅장비 개발

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