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Enhancement of Light Guiding Efficiency in CMOS Image Sensor by Introducing an Optical Thin Film

광학 박막을 채용한 CMOS 이미지 센서 픽셀의 수광 효율

  • Kang, Myung-Hoon (Department of Nano Systems Engineering, Inje University) ;
  • Ko, Eun-Mi (Department of Nano Systems Engineering, Inje University) ;
  • Lee, Je-Won (Department of Nano Systems Engineering, Inje University) ;
  • Cho, Guan-Sik (Department of Nano Systems Engineering, Inje University)
  • 강명훈 (인제대학교 대학원 나노시스템공학과) ;
  • 고은미 (인제대학교 대학원 나노시스템공학과) ;
  • 이제원 (인제대학교 대학원 나노시스템공학과) ;
  • 조관식 (인제대학교 대학원 나노시스템공학과)
  • Published : 2009.02.25

Abstract

We consider introducing an optical thin film to the light guiding wall of a pixel in order to enhance the light guiding efficiency of a CMOS image sensor. Simulating the reflectance as a function of the incidence angle using the Essential Macleod program, we find that the range of total internal reflection is greatly increased for several materials. Particularly when air is chosen as the thin film material, the critical angle of total internal reflection could be shifted to about 50 degrees.

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