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Surface Roughness and Growth Texture of (Ba,Sr)TiO3 Thin Films Formed by MOCVD

  • Y. Gao (a1), P. Alluri (a2), S. He (a1), M. Engelhard (a1), A.S. Lea, J. Finder (a3), B. Melnick (a2) and R. L. Hance (a2)...

Abstract

Metalorganic chemical vapor deposition (MOCVD) has been used to grow (Ba,Sr)TiO3 thin films on Ir/SiO2/Si substrates. β-diketonates of Ba, Sr, and Ti were used as the precursors, and delivered to the reactor via direct-liquid injection. Growth rate and film thickness were monitored by in-situ spectroscopic ellipsometry, and determined after growth. Film growth was studied as a function of film thickness, composition, substrate temperature, and mixture of O2 and N2O with and without microwave plasma enhancement. Dense, mirror-like films were obtained under all conditions except when pure oxygen plasma enhancement was used. Surface roughness of the films appears strongly dependent on film thickness and composition. Film composition and growth temperature determine growth texture of the films. This paper describes these results as well as the correlation between these results and dielectric properties.

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Surface Roughness and Growth Texture of (Ba,Sr)TiO3 Thin Films Formed by MOCVD

  • Y. Gao (a1), P. Alluri (a2), S. He (a1), M. Engelhard (a1), A.S. Lea, J. Finder (a3), B. Melnick (a2) and R. L. Hance (a2)...

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