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Phase transformation and preferred orientation in carboxylate derived ZrO2 thin films on silicon substates

Published online by Cambridge University Press:  31 January 2011

Peir-Yung Chu
Affiliation:
Department of Materials Science and Engineering, University of Illinois at Urbana–Champaign, Urbana, Illinois 61801
Isabelle Campion
Affiliation:
Department of Materials Science and Engineering, University of Illinois at Urbana–Champaign, Urbana, Illinois 61801
Relva C. Buchanan
Affiliation:
Department of Materials Science and Engineering, University of Illinois at Urbana–Champaign, Urbana, Illinois 61801
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Abstract

Phase transformation and preferred orientation in ZrO2 thin films, deposited on Si(111) and Si(100) substrates, and prepared by heat treatment from carboxylate solution precursors were investigated. The deposited films were amorphous below 450 °C, transforming gradually to the tetragonal and monoclinic phases on heating. The monoclinic phase developed from the tetragonal phase displacively, and exhibited a strong (111) preferred orientation at temperature as low as 550 °C. The degree of preferred orientation and the tetragonal-to-monoclinic phase transformation were controlled by heating rate, soak temperature, and time. Interfacial diffusion into the film from the Si substrate was negligible at 700 °C and became significant only at 900 °C, but for films thicker than 0.5 μm, overall preferred orientation exceeded 90%.

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Articles
Copyright
Copyright © Materials Research Society 1992

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