Novel Precision Thermistor from Intrinsic Germanium

A precision resistive temperature sensor for the region -30° to +180° C is described. This thermistor of intrinsic single crystalline germanium features small size (even miniaturization), very short response time, low capacitance and inherent narrow tolerances in characteristic resistance and temperature sensitivity (tracking). The latter features are due to the precise definition of intrinsic conductivity together with special electrode systems which, by concentrating the field, render the outer dimensions of the thermistor chip ineffective.