Etching Characteristics and Mechanisms of TiO2 Thin Films in HBr/Cl2/Ar Inductively Coupled Plasma

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概要

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• The TiO2 etching characteristics and mechanism in HBr/Cl2/Ar inductively coupled plasma (with a fixed bias power of 200 W) were investigated. It was found that the TiO2 etching rate in Cl2/Ar plasma is about 8 times faster than that in HBr/Ar plasma. In both HBr-rich (60% HBr + 20% Cl2 + 20% Ar) and Cl2-rich (20% HBr + 60% Cl2 + 20% Ar) plasmas, an increase in gas pressure (4--10 mTorr) results in a non-monotonic increase in TiO2 etching rate, while the variation of input power (500--800 W) causes a monotonic acceleration of the etching process. Plasma diagnostics by Langmuir probes and zero-dimensional plasma modeling provided data on plasma parameters, steady-state densities, and fluxes of active species on the etched surface. The model-based analysis of the TiO2 etching kinetics shows a transitional regime of ion-assisted chemical reaction with domination of a chemical etching pathway.

• 2012-10-25

著者

• Kwon Kwang-ho

  Department Of Electronic Engineering Hanseo University

• Yun Sun

  University of Science and Technology and Electronics and Telecommunications Research Institute, Daejon 305-350, Republic of Korea

• Efremov Alexander

  Department of Electronic Devices and Materials Technology, State University of Chemistry and Technology, 153000 Ivanovo, Russia

• Jang Hanbyeol

  Department of Control and Instrumentation Engineering, Korea University, Yeongi, Chungnam 339-700, Korea

• Kang Sungchil

  Department of Control and Instrumentation Engineering, Korea University, Jochiwon, Chungnam 339-700, Republic of Korea

• Kim Daehee

  Department of Control and Instrumentation Engineering, Korea University, Jochiwon, Chungnam 339-700, Republic of Korea

• KWON Kwang-Ho

  Department of Control and Instrumentation Engineering, Korea University

• Kwon Kwang-Ho

  Department of Control and Instrumentation Engineering, Korea University, Jochiwon, Chungnam 339-700, Republic of Korea

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