J. Mater. Sci. Technol. ›› 2025, Vol. 216: 241-259.DOI: 10.1016/j.jmst.2024.08.010

• Research Article • Previous Articles     Next Articles

Thermodynamics-based sealing method for anodized aluminum used in semiconductor processing apparatuses

Yuhang Wanga, Yang Zhaoa,∗, Shaogang Wangb,∗, Ji Chenc, Tao Zhanga, Fuhui Wanga   

  1. aCorrosion and Protection Center, Northeastern University, Shenyang 110819, China;
    bShenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China;
    cLiaoning Petrochemical University, Fushun 113001, China
  • Received:2024-05-06 Revised:2024-07-26 Accepted:2024-08-19 Published:2025-05-01 Online:2024-09-01
  • Contact: *E-mail addresses: zhaoyang7402@mail.neu.edu.cn (Y. Zhao), wangshaogang@imr.ac.cn (S. Wang)

Abstract: A principle was proposed for designing a method to seal anodized aluminum used in semiconductor processing apparatuses. Thermodynamic calculations and Fick's second law were used to reveal trends in the metal ion deposition, deposition product stability, vapor pressures of halides for selected metal ions, the holding temperature, and time. Interactions between ion concentrations and the sealing temperature were also revealed. According to the design principles, anodized aluminum dipped in 1 mM Cr3+ ion solution and steam-sealed for 18 h exhibited the highest corrosion resistance when exposed to 5 wt.% HCl solution and HCl gas, verifying the designed results.

Key words: Semiconductor, Thermodynamic calculations, Anodized aluminum, Sealing method, Design principle