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Proceedings Paper

Comparison of surface roughness measured with an optical profiler and a scanning probe microscope (Invited Paper)
Author(s): Jay Jahanmir; James C. Wyant
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Paper Abstract

The surface topography of various samples has been measured using an optical profiler and a scanning probe microscope (SPM). Optical profilers offer fast and accurate measurements of surface topography but are limited in their lateral resolution by the wavelength of light used. SPMs extend the lateral resolution down to atomic dimensions. Topography measurements are used to obtain surface roughness data. We find that for a scan size of 50 X 50 micrometers , the roughness data obtained from the optical profiler agree with the SPM measurements. The roughness data do not vary significantly when higher magnification images are taken with the SPM on surfaces that lack high frequency components. But for surfaces that have rough features that are smaller than the resolution of the optical profiler, roughness data calculated from higher magnification images by SPM can vary significantly.

Paper Details

Date Published: 20 October 1992
PDF: 8 pages
Proc. SPIE 1720, Intl Symp on Optical Fabrication, Testing, and Surface Evaluation, (20 October 1992); doi: 10.1117/12.132117
Show Author Affiliations
Jay Jahanmir, WYKO Corp. (United States)
James C. Wyant, WYKO Corp. (United States)


Published in SPIE Proceedings Vol. 1720:
Intl Symp on Optical Fabrication, Testing, and Surface Evaluation

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