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Ba0.7Sr0.3TiO3 ferroelectric film prepared with the sol-gel process and its dielectric performance in planar capacitor structure

Published online by Cambridge University Press:  31 January 2011

Fan Wang ,
Antti Uusimäki ,
Seppo Leppävuori ,
S. F. Karmanenko ,
A. I. Dedyk ,
V. I. Sakharov  and
I. T. Serenkov
Fan Wang
Affiliation:
Microelectronics Laboratory and EMPART Research Group of Infotech Oulu, University of Oulu, FIN-90570 Oulu, Finland
Antti Uusimäki
Affiliation:
Microelectronics Laboratory and EMPART Research Group of Infotech Oulu, University of Oulu, FIN-90570 Oulu, Finland
Seppo Leppävuori
Affiliation:
Microelectronics Laboratory and EMPART Research Group of Infotech Oulu, University of Oulu, FIN-90570 Oulu, Finland
S. F. Karmanenko
Affiliation:
St. Petersburg Electrotechnical University, 197376 St. Petersburg, Russia
A. I. Dedyk
Affiliation:
St. Petersburg Electrotechnical University, 197376 St. Petersburg, Russia
V. I. Sakharov
Affiliation:
Ioffe Physico-Technical Institute, Russian Academy of Science, 194021 St. Petersburg, Russia
I. T. Serenkov
Affiliation:
Ioffe Physico-Technical Institute, Russian Academy of Science, 194021 St. Petersburg, Russia
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Abstract

Ferroelectric Ba0.7Sr0.3TiO3 thin films were successfully deposited on sapphire (r-cut) substrates by the sol-gel process, and the deposited films were annealed at various temperatures and for various soaking times. The compositional and structural characteristics of the films were systematically examined with the aid of x-ray diffraction, scanning electron microscopy, and medium energy ion scattering techniques. Their dependence on thermal processes was investigated. A planar capacitor structure based on the BSTO films was fabricated to evaluate the electrical and dielectric performance. These results, together with the microstructure characteristics, were analyzed and an optimal process was finally established.

Type
Articles
Information
Journal of Materials Research , Volume 13 , Issue 5 , May 1998 , pp. 1243 - 1248
Copyright
Copyright © Materials Research Society 1998

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