Electrical conduction in dielectric films.

Polyimides as a class of polymers have excellent electrical, mechanical and chemical properties, which makes them ideal for use as insulators. This dissertation deals with the studies of charge storage, decay and conduction currents in polyimide and polyimide-FEP fluoropolymer dielectric materials. These studies would fill and complement the available electrical data and provide design data for the polyimide user. Asorption and Desorption currents are studied for polyimide (HN500 Film) and polyimide-FEP fluoropolymer (150FN09 Film) under the influence of varying parameters such as field, temperature and electrode material. The conduction currents were also studied over a temperature range of 200°C and fields up to 100KVcm-1. Attempts were then made to identify basic mechanisms that govern the absorption and the conduction currents in these materials. Ionic jump distances were evaluated from the results of conduction current. The activation energy of 0.76 eV and the ionic jump distance in the range 19--28 nm have been evaluated from analysis of the conduction currents. (Abstract shortened by UMI.)Dept. of Electrical and Computer Engineering. Paper copy at Leddy Library: Theses & Major Papers - Basement, West Bldg. / Call Number: Thesis2002 .S52. Source: Masters Abstracts International, Volume: 41-04, page: 1159. Adviser: G. R. G. Govinda Raju. Thesis (M.A.Sc.)--University of Windsor (Canada), 2002