During vehicle operation, areas such as engine compartments, chassis and power battery compartments accumulate heat for a long time, accompanied by thermal radiation and sudden temperature changes. High temperature is the main inducement for aging, performance degradation and circuit faults of vehicle circuit boards. Developed for harsh high-temperature vehicle environments, High Temperature Resistant Automotive PCBA features a customized high-temperature resistant material system. It is suitable for passenger cars, new energy vehicles, heavy-duty commercial vehicles and other models, and widely applied in electronic components in high-temperature areas such as engine electronic control units, battery management systems, on-board charging piles, exhaust monitoring modules and chassis power components. With high-end heat-resistant substrate, functional metal materials and high-temperature resistant auxiliary materials as the core, this product optimizes material formulas in all aspects and raises the heat resistance limit of circuit boards from the raw material level, solving industrial pain points of traditional circuit boards such as high-temperature softening, copper foil peeling and insulation failure to adapt to long-term high-heat vehicle working conditions.

　　The core advantage of this PCBA is the complete set of customized high-temperature resistant materials. The substrate is made of high-TG modified flame-retardant epoxy resin substrate. Different from ordinary FR-4 plates, it has a glass transition temperature of over 180℃ and a higher thermal decomposition temperature with excellent high-temperature thermal stability. The internal glass fibers are densely interwoven with sufficient resin infiltration and high curing strength. It will not soften, delaminate or warp under continuous high temperature, maintaining stable physical structure even with sudden temperature spikes and perfectly adapting to the perennial high heat of engine compartments. Meanwhile, the substrate has a low thermal expansion coefficient with minimal deformation under high temperature, avoiding circuit breakage and component desoldering caused by temperature changes.

　　The conductive material adopts thickened high-purity rolled copper foil with a purity of 99.9%. Compared with ordinary electrolytic copper, it has stronger high-temperature oxidation resistance. An oxide layer is not easily formed on the copper foil surface in high-temperature environments, maintaining constant conductive resistance without current attenuation and transmission lag caused by rising temperature. The thickened copper foil increases the current-carrying limit and is not easy to fuse or peel under high temperature and heavy load, ensuring stable power transmission under high-current working conditions. To strengthen high-temperature connection performance, the solder joints adopt high-temperature lead-free tin-silver solder with high melting temperature, strong metal adhesion and excellent thermal fatigue resistance. The solder joints are not prone to cracking or cold soldering under long-term high temperature and vibration, firmly guaranteeing the bonding strength of components.