Independence of coating and substrate admittances in triple track patterns.
01 January 1989
An experimental procedure has been proposed recently which would allow quantitative separation of bulk and interfacial admittances from AC admittance spectra taken between electrodes on a coated triple-track chip. This procedure is based on the assumption that admittance contributions from the coating and substrate media are independent. To evaluate the validity of this assumption, we have calculated the admittance for two relevant electrode configurations. Finite element simulations confirm that for any combination of permittivity and conductivity in the coating and substrate phases, bulk admittance contributions are essentially independent.