Tantalum Capacitor As A Mis Structure: Transport Characteristics Temperature Dependencies

Temperature dependencies of a leakage current in normal mode are explained on the basis of a model, in which the solid state tantalum capacitor is considered as a metal-insulatorsemiconductor (MIS) heterostructure. The measurement was performed in temperature range from 105 to 155°C. Ohmic conductivity increases exponentially with increasing temperature with activation energy 0.94 eV. Tunneling voltage parameter and tunneling energy barrier decreases with increasing temperature, reaching values 0.45 to 0.26 eV