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Infrared-light interferometry and a phase-stepping algorithm for measuring the three-dimensional topography of components covered with GaAs or Si

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Abstract

White-light scanning interferometry is extended from the visible-light region to the infrared-light region to measure the three-dimensional (3D) topography of components. An infrared-light interference system based on a linnik-type interferometric microscope is developed according to the principle of transmission of semiconductor materials in the infrared-light region. The 3D topography is measured using the components covered with a Si or GaAs wafer based on a phase-stepping algorithm. The 3D topography can be obtained accurately and relative step heights can be determined within an error less than 3% compared with the instrument MSA 400, a well-known commercially available apparatus used in the field of 3D topography measurement.

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Correspondence to Xiujian Chou.

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Chou, X., Niu, K., Liu, Y. et al. Infrared-light interferometry and a phase-stepping algorithm for measuring the three-dimensional topography of components covered with GaAs or Si. OPT REV 19, 34–38 (2012). https://doi.org/10.1007/s10043-012-0006-x

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  • DOI: https://doi.org/10.1007/s10043-012-0006-x

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