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http://dx.doi.org/10.5695/JKISE.2021.54.6.365

Influence of Plasma Corrosion Resistance of Y2O3 Coated Parts by Cleaning Process  

Kim, Minjoong (Department of Electrical Engineering, Hanyang University)
Shin, Jae-Soo (Department of Energy&Advanced Materials Engineering, Daejeon University)
Yun, Ju-Young (Vacuum Materials Measurement Team, Korea Research Institute of Standards and Science)
Publication Information
Journal of the Korean institute of surface engineering / v.54, no.6, 2021 , pp. 365-370 More about this Journal
Abstract
In this research, we proceeded with research on plasma resistance of the cleaning process of APS(Atmospheric Plasma Spray)-Y2O3 coated parts used for semiconductor and display plasma process equipment. CF4, O2, and Ar mixed gas were used for the plasma environment, and respective alconox, surfactant, and piranha solution was used for the cleaning process. After APS-Y2O3 was exposed to CF4 plasma, the surface changed from Y2O3 to YF3 and a large amount of carbon was deposited. For this reason, the plasma corrosion resistance was lowered and contamination particles were generated. We performed a cleaning process to remove the defect-inducing surface YF3 layer and carbon layer. Among three cleaning solutions, the piranha cleaning process had the highest detergency and the alconox cleaning process had the lowest detergency. Such results could be confirmed through the etching amount, morphology, composition, and accumulated contamination particle analysis results. Piranha cleaning process showed the highest detergency, but due to the very large thickness reduction, the base metal was exposed and a large number of contaminated particles were generated. In contrast, the surfactant cleaning process exhibit excellent properties in terms of surface detergency, etching amount, and accumulated contamination particle analysis.
Keywords
Plasma corrosion resistance; Spray coating; Cleaning; Contamination particle;
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