Study on the Effect of Thin Resistive Film’s Structure on the Reliability of Automotive Electronics

Thin film resistor as a passive component, is widely used in automotive electronics, because of its smaller size, lower cost, high precision and low temperature coefficient. With the continuous development of new energy vehicle, the reliability of automotive electronics comes to be a focus. As a result, the stability and reliability of thin film resistor is being paid more and more attention nowadays. In this paper, the structure and manufacturing process of thin film resistor would be briefly introduced. The common failure modes of thin film resistor would be summarized. Moreover, a case study would be presented in this paper to show the effect of thin resistive film’s structure on the reliability of automotive electronics applications. In this case, the voltage of resistor under different working conditions was tested, and the generation of abnormal voltage in circuit was explained. According to the case, with the decrease of the number of resistor unit, the reliability of the resistor decreased. In order to improve the reliability of thin film resistor, the structural consistency of resistive film should be emphasized.