Hostname: page-component-848d4c4894-tn8tq Total loading time: 0 Render date: 2024-07-03T11:36:56.078Z Has data issue: false hasContentIssue false

Laser/Optical Diagnostic Techniques for Plasma Materials Processing

Published online by Cambridge University Press:  25 February 2011

Ward C. Roman*
Affiliation:
United Technologies Research Center East Hartford, Connecticut 06108
Get access

Abstract

The application of plasma techniques is emerging as one of the more efficient means of processing materials. Technology transfer of plasma systems, both thermal and nonequilibrium, however, is severely limited by a lack of understanding of the basic mechanisms involved which govern the plasma processes used in many applications including advanced coatings. The aspects of plasma gas temperature, and species concentration and distribution (molecular, atomic, excited) in the gas phase and associated synergistic effects are fragmentary and unclear. Laser/optical diagnostic techniques represent a critical starting point for providing this needed information; they are in-situ, non-intrusive,species and quantum level specific and give excellent spatial and temporal resolution. A survey of Laser/optical diagnostic techniques applicable to plasma materials processing needs is presented. Some examples of the use of different techniques are also given.

Type
Research Article
Copyright
Copyright © Materials Research Society 1987

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

[1] Roman, W. C.: Plasma Technology for Materials Processing, Keynote Address, International Workshop on Plasma Synthesis of Materials, Los Alamos National Laboratory, New Mexico, March 1984.Google Scholar
[2] National Research CouncilNational Materials Advisory Board Report NMAB-415, Plasma Processing of Materials, National Academy Press, March 1985.Google Scholar
[3] Woody, B. and Lynds, L.: FM Laser Absorption Spectroscopy of the HF Fourth Overtone. Applied Optics, Vol.25, No. 13, July 1986.Google Scholar
[4] Atkinson, G.: Intracavity Laser Absorption Spectroscopy, Chem. Phys. Letter, Vol.130, No. 4, 1986.Google Scholar
[5] Eckbreth, A. C.: Recent Advances in Laser Diagnostics for Temperature and Species Concentration in Combustion. 18th International Symposium on Combustion, The Combustion Institute, 14711488, 1981.Google Scholar
[6] Uchida, H., et al: Spectrochemica, Acta. Vol.30B, Nos. 1/2, pp. 5–, 1983.Google Scholar
[7] Coudert, J., et al: Proceedings of 6th International Symposium on Plasma Chemistry, Paper No. A-4–1, Quebec, Canada, July 1983.Google Scholar
[8] Gelbwach, J. A.: Rev. Sci. Instruments, Vol.56 (5), May 1985.Google Scholar
[9] Selwyn, G. S., J. Appl. Phys. 60, 2771, 1986.Google Scholar
[10] Long, M. et al: Instantaneous Two-Dimensional Gas Concentration Measurements by Light Scattering. AIAA Journal, Vol.19, No. 9, Sept. 1981.Google Scholar