With the rapid development of electronic equipment towards the direction of intelligence, NTC thermistor chip as a temperature monitoring, temperature control and temperature protection components, its application is more and more extensive. With the expansion of the application range, the R-T characteristics of the resistance value of the NTC thermistor chip changing with temperature have produced many special requirements that are different from the conventional values, such as requiring the end high temperature of the NTC chip to have a higher resistance value, the initial resistance value of the positive temperature coefficient to increase, the nonlinearity of temperature coefficient α value and the thermal constant B value of the NTC chip, etc.. However, the NTC thermistor chip in the existing technology can not meet the above requirements for the time being, in order to overcome the shortcomings and deficiencies of the existing technology, EXSENSE Electronics introduces a composite type NTC thermistor chip, which temperature coefficient α value and thermal constant B value can be complementary, and has specialized R-T characteristics.

Composite type NTC thermistor chip, which includes the first chip and the second chip, the first chip and the second chip are connected in series or in parallel. Among them, the first chip is NTC thermistor chip, which includes an upper surface metal electrode layer, a lower surface metal electrode layer and a chip ceramic body; the second chip is a resistance chip or a capacitor chip, which also includes an upper surface metal electrode layer, a lower surface metal electrode layer and a chip ceramic body. One end of the ceramic body on the first chip that is not covered with the metal electrode layer is connected with one end of the ceramic body on the second chip that is not covered with the metal electrode layer, so that the first chip and the second chip are connected in series.

When the first chip is NTC thermistor chip, and the resistance chip is the second chip and it is NTC thermistor chip, the second chip is connected in series with the first chip, and the thermal constant B value of the composite type NTC thermistor chip is between the B value of the first chip and the second chip. Moreover, the resistance value of the composite type NTC thermistor chip is the sum of the resistance value of the first thermistor chip and the second thermistor chip.

When the first chip is NTC thermistor chip, and the resistance chip is the second chip and it is fixed resistance chip, the second chip is connected in series with the first chip, by choosing different first chip to composite with fixed resistance chip, the composite type NTC thermistor chip with specialized R-T characteristics can be obtained,and which can improved the resistance value of the composite type NTC thermistor chip, especially the resistance value of the high temperature range.