INVESTIGATION OF LTCC THERMISTOR PROPERTIES

The work is conducted on NTC (Negative Temperature Coefficient) thermistors. An influence of different type of the substrate (DP 951 and lead free ESL 41020) on basic electrical properties: sheet resistance at a room temperature, R = f(T) dependence, B constant and a long-term stability is analyzed. The resistance values are measured twenty times in the range from 25oC to 125 oC at 5 oC intervals, while temperature is recorded using Pt-100 resistor. Long-term stability is investigated by annealing at 1500C for 200 h.