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Thermal Stress in Thin Films using Real-time Holographic Interferometry

Ramprasad, BS and Radha, TS (1989) Thermal Stress in Thin Films using Real-time Holographic Interferometry. In: Second International Conference on Holographic Systems, Components and Applications, 11-13 September, Bath, pp. 29-32.


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With the numerous applications of thin films, the mechanical properties of thin films are becoming increasingly important. Of these, the fact that internal stresses exist in thin films has been known for over a hundred years. Stresses in evaporated thin films have been a topic of study by many workers and many good reviews have come out (1.2). Besides the internal stress, the thermal stress arising out of the difference in thermal coefficient of expansion of the substrate and film material also becomes important. Though much data is available for internal stress in thin films, the data for thermal stress is scanty. It is in this context a study has been undertaken to set up a novel technique of measurement of thermal stress of thin films using real-time holographic interferometry. Using this technique thermal stress in conductive coatings has been studied and some results on iron and copper films are presented.

Item Type: Conference Paper
Publisher: IEE
Additional Information: Copyright of this article belongs to Institution of Electrical Engineers (IEE)
Department/Centre: Division of Electrical Sciences
Date Deposited: 11 Nov 2005
Last Modified: 19 Sep 2010 04:20
URI: http://eprints.iisc.ac.in/id/eprint/3875

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