Effect of Electrode Diameter on Pine Ceramic Pattern Formed by Using Pin-To-Pin Type Electro-Hydrodynamic Printing

핀-핀 형 전극의 전기-수력학 프린팅에서 전극 직경이 미세 세라믹 패턴 형성에 미치는 영향

  • 이대영 (연세대학교 대학원 기계공학과) ;
  • 유재훈 (연세대학교 대학원 기계공학과) ;
  • 류태우 (한국생산기술연구원) ;
  • 황정호 (연세대학교 기계공학부) ;
  • 김용준 (연세대학교 기계공학부)
  • Published : 2005.09.01

Abstract

The generation of fine relics of suspensions is a significant interest as it holds the key to the fabrication of electronic devices. These processes offer opportunities for miniaturization of multilayer circuits, for production of functionally graded materials, ordered composites and far small complex-shaped components. Some novel printing methods of depositing ceramic and metal droplets were suggested in recent years. In an electro-hydrodynamic printing, the metallic capillary nozzle can be raised to several kilovolts with respect to the infinite ground plate or pin-type electrode positioned a few millimeters from the nozzle tip. Depending on the electrical and physical properties of the liquid, for a given geometry, it Is possible to generate droplets in any one of three modes, dripping, cone-jet and multi-jet. In this experiment, an alumina suspension flowing through a nozzle was subjected to electro-hydrodynamic printing using pin-type electrodes in the cone-jet mode at different applied voltages. The pin-type electrodes of 1, 100, 1000${\mu}m$ in diameter were used to form fine ceramic patterns onto the substrates. Various feature sizes with applied voltages and electrode diameters were measured. The feature sizes increased with the electrode diameter and applied voltages. The feature size was as fine as $30 {\mu}m$.

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