Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)

The Korean Institute of Electrical Engineers (대한전기학회)
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Driving Per Nozzle By Various Waveform Depending On Resonance Frequency In Piezoelectric Inkjet Head

잉크젯 헤드의 공진주파수에 따른 구동파형을 이용한 개별노즐 제어

  • Kim, Y.J. (eMD Lab., Central R&D Institute, Samsung Electro-Mechanics) ;
  • Park, C.S. (eMD Lab., Central R&D Institute, Samsung Electro-Mechanics) ;
  • Sim, W.C. (eMD Lab., Central R&D Institute, Samsung Electro-Mechanics) ;
  • Kang, P.J. (eMD Lab., Central R&D Institute, Samsung Electro-Mechanics) ;
  • Yoo, Y.S. (eMD Lab., Central R&D Institute, Samsung Electro-Mechanics) ;
  • Park, J.H. (CAE Group, Central R&D Institute, Samsung Electro-Mechanics) ;
  • Joung, J.W. (eMD Lab., Central R&D Institute, Samsung Electro-Mechanics) ;
  • Oh, Y.S. (eMD Lab., Central R&D Institute, Samsung Electro-Mechanics)
  • 김영재 (삼성전기 중앙연구소 eMD Center) ;
  • 박창성 (삼성전기 중앙연구소 eMD Center) ;
  • 심원철 (삼성전기 중앙연구소 eMD Center) ;
  • 강필중 (삼성전기 중앙연구소 eMD Center) ;
  • 유영석 (삼성전기 중앙연구소 eMD Center) ;
  • 박정훈 (삼성전기 중앙연구소 CAE Group) ;
  • 정재우 (삼성전기 중앙연구소 eMD Center) ;
  • 오용수 (삼성전기 중앙연구소 eMD Center)
  • Published : 2007.07.18
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Abstract

This paper presents the effect of driving waveform for piezoelectric bend mode inkjet printhead with optimized mechanical design. Experimental and theoretical studies on the applied driving waveform versus jetting characteristics were performed. The inkjet head has been designed to maximize the droplet velocity, minimize voltage response of the actuator and optimize the firing frequency to eject ink droplet. The head design was carried out by using mechanical simulation. The printhead has been fabricated with Si(100) and SOI wafers by MEMS process and silicon direct bonding method. To investigate how performance of the piezoelectric ceramic actuator influences on droplet diameter and droplet velocity, the method of stroboscopy was used. Using the water based ink of viscosity of 11.8 cps and surface tension of 0.025N/m, it is possible to eject stable droplets through 64 nozzles average velocity of 4.05 m/s with standard deviation of 0.06 m/s and average diameter of $29.2\;{\mu}m$ with standard variation of $0.5\;{\mu}m$.

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