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Optical diagnostics for thin film processing.

Irving P Herman1

  • 1Department of Applied Physics and Applied Mathematics, Columbia University, New York, NY 10027, USA. iph1@columbia.edu

Annual Review of Physical Chemistry
|February 8, 2003
PubMed
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Optical diagnostics provide crucial insights into thin film processing, analyzing plasma, particles, and film properties. These methods enhance control and understanding of deposition and etching processes.

Area of Science:

  • Materials Science and Engineering
  • Plasma Physics
  • Optical Physics

Background:

  • Thin film processing is critical for advanced materials and devices.
  • In-situ monitoring is essential for process control and optimization.
  • Traditional methods may not capture dynamic plasma and film characteristics.

Purpose of the Study:

  • To review the development and application of optical diagnostics in thin film processing.
  • To highlight the use of optical probes for analyzing plasma/gas phase species and film composition.
  • To emphasize optical methods for metrology, thermometry, and endpoint detection.

Main Methods:

  • Spectroscopy (e.g., optical emission spectroscopy, absorption spectroscopy)
  • Pyrometry and thermographic imaging

Related Experiment Videos

  • Laser-based techniques (e.g., laser-induced fluorescence, Raman spectroscopy)
  • Ellipsometry and reflectometry

    • Main Results:

    • Optical diagnostics enable real-time analysis of plasma intermediates and products.
    • They allow for precise measurement of film composition, temperature, and thickness.
    • Optical probes are effective for endpoint detection and process control in etching and deposition.

    Conclusions:

    • Optical diagnostics are versatile tools for in-situ monitoring and control of thin film processes.
    • Their application significantly improves process understanding, yield, and film quality.
    • Continued development of optical techniques will further advance thin film fabrication.