Determination of the mechanical properties of thin films by digital phase shifting interferometry

Chuen Lin Tien, Cheng Chung Lee, Yu Lung Tsai, Wen Shing Sun

研究成果: 雜誌貢獻期刊論文同行評審

18 引文 斯高帕斯(Scopus)

摘要

A new method for the measurement of internal stress and coefficient of thermal expansion of thin oxide films is presented and investigated experimentally, that combines digital phase shifting interferometry with image-processing technique to improve the accuracy of the conventional interferometric method. The change of the deflection (or curvature) of the coated substrates by the deposited film can be obtained by the phase maps. Using the Zernike polynomial fitting algorithm, a 3-D contour plot is generated from the polynomial coefficients to visualize the deformation of the thin film. Four oxide films prepared by ion beam sputter deposition with a Kaufman-type ion source are investigated for their mechanical properties. The contribution of the proposed method is to increase the sensitivity and accuracy of the temperature-dependence stress measurements.

原文???core.languages.en_GB???
頁(從 - 到)325-331
頁數7
期刊Optics Communications
198
發行號4-6
DOIs
出版狀態已出版 - 1 11月 2001

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