Tribology and Lubricants

Korean Tribology Society (한국트라이볼로지학회)
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A Study of the Effects of Pressure Velocity and Fluid Viscosity in Abrasive Machining Process

입자연마가공에서의 압력 속도 및 유체점도의 영향에 대한 고찰

  • Yang, Woo-Yul (Dept. of Mechanical Engineering, Hannam University) ;
  • Yang, Ji-Chul (Thin Film/CMP Technology Group, Memory Division, Samsung Electronics) ;
  • Sung, In-Ha (Dept. of Mechanical Engineering, Hannam University)
  • 양우열 (한남대학교 기계공학과) ;
  • 양지철 (삼성전자 반도체사업부) ;
  • 성인하 (한남대학교 기계공학과)
  • Received : 2010.11.24
  • Accepted : 2011.01.18
  • Published : 2011.02.28
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Abstract

Interest in advanced machining process such as AJM(abrasive jet machining) and CMP(chemical-mechanical polishing) using micro/nano-sized abrasives has been on the increasing demand due to wide use of super alloys, composites, semiconductor and ceramics, which are difficult to or cannot be processed by traditional machining methods. In this paper, the effects of pressure, wafer moving velocity and fluid viscosity were investigated by 2-dimensional finite element analysis method considering slurry fluid flow. From the investigation, it could be found that the simulation results quite corresponded well to the Preston's equation that describes pressure/velocity dependency on material removal. The result also revealed that the stress and corresponding material removal induced by the collision of particle may decrease under relatively high wafer moving speed due to the slurry flow resistance. In addition, the increase in slurry fluid viscosity causes the reduction of material removal rate. It should be noted that the viscosity effect can vary with the shape of abrasive particle.

Keywords

References

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