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Characterization of surface microroughness of silicon wafers by a multipass Fabry–Perot Rayleigh–Brillouin scattering spectrometer

Published online by Cambridge University Press:  31 January 2011

Lu Taijing
Affiliation:
Department of Physics, National University of Singapore, Lower Kent Ridge Road, Singapore 119280, Singapore
S. C. Ng
Affiliation:
Department of Physics, National University of Singapore, Lower Kent Ridge Road, Singapore 119280, Singapore
J. Furukawa
Affiliation:
Central Research Institute, Mitsubishi Materials Corporation, 1–297, Kitabukuro-Cho, Omiya, Saitama 330, Japan
H. Furuya
Affiliation:
Central Research Institute, Mitsubishi Materials Corporation, 1–297, Kitabukuro-Cho, Omiya, Saitama 330, Japan
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Abstract

Surface microroughness of various Si(100) wafers was detected and characterized by a 180° backscattering Rayleigh–Brillouin scattering spectrometer (RBSS), and measured by an atomic force microscopy (AFM). The intensity of the scattered light from the wafers is found to increase with increasing surface microroughness which was measured by AFM. By scanning across the wafer, the inhomogeneous distribution of surface microroughness is detected and characterized. The system can be easily developed into a mapping technique. The results of the surface microroughness detected by AFM and RBSS suggest that they are complementary for the characterization of the surface microroughness from a microarea to a whole wafer.

Type
Articles
Copyright
Copyright © Materials Research Society 1996

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