Modeling interdigital electrode structures for the dielectric characterization of electroceramic thin films

A combination of physical and numerical modeling has been used to investigate the use of co-planar interdigital electrode (IDE) structures to characterize the dielectric properties of isotropic electroceramic thin films. A periodic two-dimensional IDE structure was simulated by finite-difference num...

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Veröffentlicht in:Thin solid films 2006-02, Vol.496 (2), p.539-545
Hauptverfasser: Kidner, N.J., Homrighaus, Z.J., Mason, T.O., Garboczi, E.J.
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container_end_page 545
container_issue 2
container_start_page 539
container_title Thin solid films
container_volume 496
creator Kidner, N.J.
Homrighaus, Z.J.
Mason, T.O.
Garboczi, E.J.
description A combination of physical and numerical modeling has been used to investigate the use of co-planar interdigital electrode (IDE) structures to characterize the dielectric properties of isotropic electroceramic thin films. A periodic two-dimensional IDE structure was simulated by finite-difference numerical modeling to investigate different electrode geometries and film thicknesses. A semi-empirical equation that enables the dielectric properties of the thin film to be calculated from the measured capacitance has been developed and is shown to be consistent with conformal mapping approaches. This equation is shown to agree better with various calculations over a wider range of parameters than the existing equation of Farnell (IEEE Trans. Son. Ultrson., SU-17(3) (1970) 188). Physical simulations of IDE structures with a limited number of electrode fingers have enabled the approach to be generalized to any IDE structure including the important special case of a two-electrode strip-line.
doi_str_mv 10.1016/j.tsf.2005.08.350
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subjects Chemistry
Conformal mapping
Dielectric
Electrochemistry
Electrodes: preparations and properties
Exact sciences and technology
Farnell
General and physical chemistry
Interdigitial electrodes
title Modeling interdigital electrode structures for the dielectric characterization of electroceramic thin films
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