Ferroelectric Properties of Pb(Zr,Ti)O3 Thin Film Capacitors Made by RF Magnetron Sputtering and Heat-Treated by the Bottom Electrode Crystallization Method

Andréi I. Mardare; Cezarina C. Mardare; Raluca Savu

doi:10.4028/www.scientific.net/MSF.514-516.1348

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HomeMaterials Science ForumMaterials Science Forum Vols. 514-516Ferroelectric Properties of Pb(Zr,Ti)O3 Thin Film...

Ferroelectric Properties of Pb(Zr,Ti)O₃ Thin Film Capacitors Made by RF Magnetron Sputtering and Heat-Treated by the Bottom Electrode Crystallization Method

Abstract:

The bottom electrode crystallization (BEC) method was applied to the crystallization of Pb(Zr,Ti)O3 (PZT) thin films deposited by RF magnetron sputtering on Pt/Ti/SiO2/Si substrates. Using a proportional-integral-differential controller, the current flowing in the Pt/Ti films provided accurately controlled Joule heating for the crystallization of the PZT films. The temperature uniformity of the heat treatments was investigated by measuring the ferroelectric properties of PZT. Platinum and tungsten wires were alternatively used as electrical contacts. Scanning electron microscopy (SEM) images were used to inspect the electrical contact regions between the platinum films and different contact wires. The PZT films showed higher remanent polarizations and lower leakage currents near the electrical contacts when Pt wires were used; the ferroelectric properties were more uniform on the PZT films heat-treated with W contact wires. The BEC method can successfully replace the more conventional means for thin film crystallization, having the advantage of being a very precise, low cost and low power consumption technique.

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Materials Science Forum (Volumes 514-516)

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1348-1352

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https://doi.org/10.4028/www.scientific.net/MSF.514-516.1348

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May 2006

Authors:

Andréi I. Mardare, Cezarina C. Mardare, Raluca Savu

Keywords:

Heat Treatment, Joule Heating, Platinum, Proportional Control, PZT Ceramics

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