Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference (한국전기전자재료학회:학술대회논문집)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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Study on Optical Properties of Lithium niobate using Chemical Mechanical Polishing

화학 기계적 연마에 의한 리튬 니오베이트의 광학 특성에 관한 연구

  • Jeong, Suk-Hoon (Precision Manufacturing System Div., Graduate School of Mechanical Engineering, Pusan National Univ.) ;
  • Kim, Young-Jin (Precision Manufacturing System Div., Graduate School of Mechanical Engineering, Pusan National Univ.) ;
  • Lee, Hyun-Seop (Precision Manufacturing System Div., Graduate School of Mechanical Engineering, Pusan National Univ.) ;
  • Jeong, Hae-Do (Precision Manufacturing System Div., Graduate School of Mechanical Engineering, Pusan National Univ.)
  • 정석훈 (부산대학교 기계공학부 정밀가공시스템) ;
  • 김영진 (부산대학교 기계공학부 정밀가공시스템) ;
  • 이현섭 (부산대학교 기계공학부 정밀가공시스템) ;
  • 정해도 (부산대학교 기계공학부 정밀가공시스템)
  • Published : 2008.06.19
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Abstract

Lithium Niobate (LN:LiNbO3) is a compound of niobium, lithium and oxygen. The characteristics of LN are piezoelectricity, ferroelectricity and photoelectricity, and which is widely used in surface acoustic wave (SAW). To manufacture LN device, the LN surface should be a smooth surface and defect-free because of optical property, but the LN material is processed difficult by traditional processes such as grinding and mechanical polishing (MP) because of its brittleness. To decrease defects, chemical mechanical polishing (CMP) was applied to the LN wafer. In this study, the suitable parameters scuh as pressure and relative velocity, were investigated for the LN CMP process. To improve roughness, the LN CMP was performed using the parameters that were the highest removal rate among process parameters. And, evaluation of optical property was performed by the optical reflectance and non-linear characteristic.

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