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Sidewall Roughness in Si3N4 Waveguides Directly Measured by Atomic Force Microscopy

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Abstract

We have developed a robust method to measure side-wall-roughness of sub-micron feature waveguides using atomic-force-microscopy. We measure the side-wall-roughness of silicon-nitride waveguides patterned by DUV photolithography and compare results of two different etch chemistries.

© 2017 Optical Society of America

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