As a key component for the operation of the automotive electrical system, strong reliability is a must. PCBs are critical components of automotive electronic systems, and special attention must be paid to PCB failure modes that can lead to shorts or opens. The key characteristics of PCB include insulation, electrical conductivity, and mechanics. Its common environmental loads and assembly loads and the possible failure modes caused by them mainly include six types of cracks in the outer copper layer, plated through holes, or cracks in the inner copper layer. It is imperative to understand the failure modes of the PCB and provide a PCB that will operate more efficiently and reliably.

The development of the new four modernizations of automobiles has increased the specific applications of automotive electronics, and the requirements for PCB diversification will increase. Electronics are getting smaller and closer to actuators such as engines, for example power electronics are subject to higher temperatures; on the other hand, electronics such as on-board computers are better protected from external The effect of stress, due to the charging time and 24 hours a day of uninterrupted service, requires a longer service life. In addition, related PCBs need to withstand the high-voltage automotive environment under electrification, and the reliability requirements have been improved; intelligence and networking have increased the requirements for signal processing, and HDI technology needs to be improved to use thousands of I/O and BGA Processor and memory spaced <0.8 mm.