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A Study of a Method to Evaluate the Corrosion Resistance of Al2O3 Coated Vacuum Components for Semiconductor Equipment

반도체 장비용 Al2O3 코팅 진공부품의 내부식성 평가 연구

  • You, S.M. (Vacuum Center, Korea Research Institute of Standards and Science) ;
  • Yun, J.Y. (Vacuum Center, Korea Research Institute of Standards and Science) ;
  • Kang, S.W. (Vacuum Center, Korea Research Institute of Standards and Science) ;
  • Shin, J.S. (Department of Materials Science and Engineering, Daejeon University) ;
  • Seong, D.J. (Vacuum Center, Korea Research Institute of Standards and Science) ;
  • Shin, Y.H. (Vacuum Center, Korea Research Institute of Standards and Science)
  • 유승민 (한국표준과학연구원 진공센터) ;
  • 윤주영 (한국표준과학연구원 진공센터) ;
  • 강상우 (한국표준과학연구원 진공센터) ;
  • 신재수 (대전대학교 신소재공학과) ;
  • 성대진 (한국표준과학연구원 진공센터) ;
  • 신용현 (한국표준과학연구원 진공센터)
  • Published : 2008.05.30

Abstract

This study is concerned with the evaluation of the corrosion resistance of coated semiconductor equipment parts with various processes. To select the appropriate basis for evaluation, replacement parts were observed during the semiconductor manufacturing process. This study also ran a dry corrosion test using $Al_2O_3$, which is mostly used as a coating material. This test quantitatively measured the efficiency of coated parts. Surface morphology, leakage current and breakdown voltage were also evaluated. This study showed that a dry corrosion process led to the drop of electrical properties, for example, the leakage current increase and the dielectric strength decrease. The surface morphology test displayed that surface damage is largely dependent on the exposure time to corrosive environments. By using the values that changed during the corrosion process, it may be possible to contrive a method to evaluate the efficiency of coated parts with various processes.

반도체 장비용 진공코팅부품의 공정영향에 의한 내부식 성능 평가방법을 연구개발 하였다. 평가기준을 마련하기 위해 반도체 공정에서 교체된 코팅부품의 특성을 분석 평가하였다. 코팅부품의 성능을 정량적으로 측정하기 위하여 부품의 코팅막으로 많이 사용되고 있는 $Al_2O_3$ 막의 건식부식실험을 실시하였고 표면모폴로지, 누설전류 및 내전압측정 등을 수행하였다. 실험결과 건식부식처리 후 샘플의 누설전류량이 증가하였고, 절연내력이 크게 줄어 전기적 특성이 하향된 결과를 보였으며, 표면 모폴로지의 경우 부식시간 증가에 따라 표면 손상정도가 증가하는 것을 확인 할 수 있었다. 부식공정에 의한 이들 특성 값 변화를 이용하여 코팅부품의 공정영향에 의한 성능평가 방법을 개발할 수 있었다.

Keywords

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