Publication

Size and top electrode-edge effects on fatigue in Pb(Zr,Ti)O-3 capacitors with Pt-electrodes

Nava Setter, Alexander Tagantsev
2001
Journal Articles

Abstract

The occurrence of switching-induced suppression of the remanent polarization (fatigue) in Pb(Zr,Ti)O-3 (PZT) ferroelectric capacitors with comb shaped top electrodes was studied by means of scanning force microscopy assisted by a lock-in amplifier. Fatigue occurs earlier in capacitor with narrower comb-fingers, mainly in the central part of the fingers. In addition to this size effect, electrode-edge effects could be observed. Along the edges, in an area of about 250nm width, the preferential direction of the blocked polarization is opposite to that in the center of the comb fingers; in this area, fatigue occurs generally one to two cycle-decades later. Self-recovery effects were also localized to mainly occur near the edges of the electrodes. The mechanism of these results is discussed on the basis of fringe field and stress at top electrode edge.

Official source

https://infoscience.epfl.ch/entities/publication/f88af0e1-6cd3-486d-b9cd-5bcae259c640

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Nava Setter, Alexander Tagantsev
2001
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/f88af0e1-6cd3-486d-b9cd-5bcae259c640

About this result

Related concepts (32)

Capacitor types

Capacitors are manufactured in many styles, forms, dimensions, and from a large variety of materials. They all contain at least two electrical conductors, called plates, separated by an insulating layer (dielectric). Capacitors are widely used as parts of electrical circuits in many common electrical devices. Capacitors, together with resistors and inductors, belong to the group of passive components in electronic equipment.

Ceramic capacitor

A ceramic capacitor is a fixed-value capacitor where the ceramic material acts as the dielectric. It is constructed of two or more alternating layers of ceramic and a metal layer acting as the electrodes. The composition of the ceramic material defines the electrical behavior and therefore applications. Ceramic capacitors are divided into two application classes: Class 1 ceramic capacitors offer high stability and low losses for resonant circuit applications.

Electrolytic capacitor

An electrolytic capacitor is a polarized capacitor whose anode or positive plate is made of a metal that forms an insulating oxide layer through anodization. This oxide layer acts as the dielectric of the capacitor. A solid, liquid, or gel electrolyte covers the surface of this oxide layer, serving as the cathode or negative plate of the capacitor. Because of their very thin dielectric oxide layer and enlarged anode surface, electrolytic capacitors have a much higher capacitance-voltage (CV) product per unit volume than ceramic capacitors or film capacitors, and so can have large capacitance values.

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Size and top electrode-edge effects on fatigue in Pb(Zr,Ti)O-3 capacitors with Pt-electrodes

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