LCP is a high-performance thermal management solution engineered by bonding a synthetic diamond heat spreader onto a copper baseplate via an atomic-level copper-ion (Cu²⁺) interfacial layer. It provides ultra-fast heat spreading (diamond offers ~5× higher thermal conductivity than copper), eliminates interfacial thermal resistance without solder or thermal grease, and ensures efficient heat transfer to downstream liquid cold plates. This substrate is ideally suited for high-power-density SiC-based traction inverters in electric vehicles and high-speed rail applications where reliability and thermal performance are critical.