Electrical conduction in polyimide between 20 and 350° C

Interdigital sensors and transducers

“…At such low levels, the reduction of electrical noise through electromagnetic shielding and digital filtering of the sensor output signal becomes particularly important [101]. A strong dependence of dielectric properties of polyimides on ambient moisture concentration introduces difficulties to some applications of microdielectrometry.…”

“…A strong dependence of dielectric properties of polyimides on ambient moisture concentration introduces difficulties to some applications of microdielectrometry. The control of ambient moisture may be necessary for achieving reproducible results with sensors that use a Kapton substrate [101]. An extensive review of the dependence of Kapton properties on moisture and ionic contaminants is provided in [102].…”

“…Sometimes, history effects arise because charge accumulation in a previous experiment can influence the current distribution in subsequent experiments [101].…”

The use of the final thermally stimulated discharge current technique to study the molecular movements around glass transition

“…Strong chemical bonds of PI macromolecules and the symmetry of benzene rings molecular chain cause the polymer to be very resistant to most of solvents and radiations [2]. PI has good electric properties and easy processing [3][4][5]. Consequently, it has a high potential for microelectronic applications, e.g., as interlayer dielectrics, flexible circuitry substrates, stress buffers, and passivation layers.…”

“…Consequently, it has a high potential for microelectronic applications, e.g., as interlayer dielectrics, flexible circuitry substrates, stress buffers, and passivation layers. PI is a hydrophilic polymer and its dielectric properties largely depend upon absorbed water or humidity [4][5][6]. A good deal of work on electrical conduction in PI at low fields [7][8][9][10][11] and high fields [6,12] has been reported.…”