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Correlation of Plasma Erosion Resistance and the Microstructure of YF3 Coatings Prepared by Vacuum Kinetic Spray

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Abstract

To decrease the generation of contamination particles during semiconductor manufacturing processes, a plasma-erosion-resistant coating that can prevent particle dropout on the surface of the wafer etching chamber is required. In this work, correlation between plasma-erosion resistance and the microstructure of a YF3 coating deposited by vacuum kinetic spray (VKS) was studied. The plasma-erosion resistance of the coatings was evaluated using inductively coupled plasma etching tests, and the microstructure of the coatings before and after the etching test was analyzed using field emission scanning electron microscope and transmission electron microscope. Via a simple heat treatment of the feedstock powder, YF3 coatings with different deposition behaviors were prepared. As the heat treatment temperature of the feedstock powder was increased, the plasma-erosion resistance was improved. High-density YF3 coatings had randomly oriented small crystallites induced by sufficient room-temperature impact consolidation. The adhesion strength of the coating was improved with higher heat treatment temperature, which contributed to significant reduction in particle dropout from the YF3 coating. These results imply that the plasma-erosion resistance of YF3 coatings formed by VKS can be controlled by coating characteristics such as crystallite size, porosity, roughness, and density.

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Acknowledgments

This work was supported by the World Class 300 Project R&D Support project (www.worldclass300.or.kr) funded by the Small and Medium Business Administration (SMBA, Korea) [Project Name: Development of Plasma-resistant Surface Treatment Technology for 3D-structure and Large-area Parts of Semiconductor/Display Fabrication Equipment].

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Authors and Affiliations

  1. Kinetic Spray Coating Laboratory (NRL), Division of Materials Science and Engineering, Hanyang University, Seongdong-gu, Seoul, 04763, South Korea

    Yeonju Kim, Hansol Kwon & Changhee Lee

  2. Research & Development (R&D) Center, Hyundai Steel Company, Dangjin-Si, Chungnam, 31719, South Korea

    Hyungkwon Park

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  1. Yeonju Kim
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  2. Hansol Kwon
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  4. Changhee Lee
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Correspondence to Changhee Lee.

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Kim, Y., Kwon, H., Park, H. et al. Correlation of Plasma Erosion Resistance and the Microstructure of YF3 Coatings Prepared by Vacuum Kinetic Spray. J Therm Spray Tech 29, 1016–1026 (2020). https://doi.org/10.1007/s11666-020-01019-4

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  • DOI: https://doi.org/10.1007/s11666-020-01019-4

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