This paper describes conduction processes in thick film resistors made from 1 MΩ/square and 10 MΩ/square pastes.
Conductivity as a function of temperature indicates activation energies in the order of 1 meV. At high fields,
conductivity is increased. These results are interpreted on the basis of a model where the main resistor characteristics
are determined by hopping conduction in a narrow impurity band in the glass phase of the resistor.