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Microstructure and electrical properties of chemical solution deposition (Pb,La)(Zr,Ti)O3 thin films on Pt electrodes

Published online by Cambridge University Press:  31 January 2011

Jeffrey S. Cross ,
Mitsushi Fujiki ,
Mineharu Tsukada ,
Yasutoshi Kotaka  and
Yasuyuki Goto
Jeffrey S. Cross
Affiliation:
Fujitsu Laboratories, Ltd., 10-1 Morinosato-wakamiya, Atsugi 243-0197, Japan
Mitsushi Fujiki
Affiliation:
Fujitsu Laboratories, Ltd., 10-1 Morinosato-wakamiya, Atsugi 243-0197, Japan
Mineharu Tsukada
Affiliation:
Fujitsu Laboratories, Ltd., 10-1 Morinosato-wakamiya, Atsugi 243-0197, Japan
Yasutoshi Kotaka
Affiliation:
Fujitsu Laboratories, Ltd., 10-1 Morinosato-wakamiya, Atsugi 243-0197, Japan
Yasuyuki Goto
Affiliation:
Fujitsu Laboratories, Ltd., 10-1 Morinosato-wakamiya, Atsugi 243-0197, Japan
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Abstract

(Pb,La)(Zr,Ti)O3 (PLZT) films with thicknesses of 150 and 225 nm were prepared by the chemical solution deposition method on sputtered Pt/IrO2 coated on SiO2/Si wafers. The annealed films revealed two different microstructures: fined-grained and large-grained. The thinner film had the largest grain size and highest leakage current, whereas the thicker film had small grains and lower leakage. Atomic force microscope images showed that the thinner film had half-domed-shaped grains, which were about one-third thinner at the grain boundary triple points. These triple points also contained a nanocrystalline nonstoichiometric secondary phase, which contributed to high leakage. A model was developed showing differences in crystallization on the basis of grain growth and number of nuclei on the Pt surface. These results indicate the importance of controlling the film microstructure and its relationship to the film electrical properties.

Type
Articles
Information
Journal of Materials Research , Volume 14 , Issue 11 , November 1999 , pp. 4366 - 4371
Copyright
Copyright © Materials Research Society 1999

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References

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