Korean Journal of Optics and Photonics (한국광학회지)

Optical Society of Korea (한국광학회)
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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
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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.

CMOS 이미지 센서의 수광 효율을 높이기 위해서 픽셀의 광 통로 벽에 광학 박막의 도입을 제안하고자 한다. Essential Macleod를 이용하여 시뮬레이션해 본 결과, 전반사가 일어나는 범위가 현저히 증가하였다. 특히 공기 박막을 도입할 경우에, 그 효과가 가장 현저하여, 광 통로 벽에서의 전반사 임계각이 50도로까지 확대되었다.

Keywords

References

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