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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
XPS Si2p spectra of Si-face 6H-SiC surfaces using CMP slurry: (a) before chemical corroding; (b,c) conventional chemical corroding (C-c’, U-c’); (d,e) ultrasonic chemical corroding (C-u’, U-u’).