Metal Core Printed Circuit Boards (MCPCBs) use metal as their substrate material, contrary to traditional FR4 heat sinks. Therefore, MCPCBs are sometimes referred to as thermal PCBs. With various electronic components operating on the board, heat accumulates. By using a metal substrate, the heat is transferred from critical board components to less critical areas, such as a heatsink b... https://www.pcbhamal.com/pcb-fabrication-capabilities/aluminum-pcb-copy/