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서지반출
Determination of Film Thickness and Surface Profile using Reflectometry and Spectrally Resolved Phase Shifting Interferometry
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  • Determination of Film Thickness and Surface Profile using Reflectometry and Spectrally Resolved Phase Shifting Interferometry
  • Determination of Film Thickness and Surface Profile using Reflectometry and Spectrally Resolved Phase Shifting Interferometry
저자명
Debnath. Sanjit Kumar,You. Joon-Ho,Kim. Seung-Woo
간행물명
International journal of precision engineering and manufacturing
권/호정보
2009년|10권 5호|pp.5-10 (6 pages)
발행정보
한국정밀공학회
파일정보
정기간행물|ENG|
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이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
서지반출

기타언어초록

Surface profiling and film thickness measurement play an important role for inspection in semi conductor industry. White light source had been used as scanning white light interferometry and spectrally resolved white light interferometry for determining surface and film thickness profile. These techniques however failed for thinner film. Recently, reflectometry and spectrally resolved white light interferometry was combined for the same. This technique used Fourier Transform for the calculation of phase in spectral domain with the use of Linnik interferometer. In this method a large amount of carrier offset (carrier fringes) is required to be effective. This carrier fringes in spectrally resolved white light interferometry was achieved by increasing the optical path difference between the test and the reference surface. But, Linnik interferometer cause defocusing problem to create these carrier fringes. We propose in this paper to combine reflectometry and spectrally resolved phase shifting interferometry for measurement of surface and film thickness profile with the use of Michelson objective. Michelson objective will be convenient to implement as compared to the Linnik type and the use of phase shifting interferometry does not necessarily need large number of fringes in the spectral domain.