Copper-based IMS is not automatically better than aluminum IMS. The right choice depends on heat density, thermal spreading requirements, dielectric performance, PCB structure, weight, cost, and operating conditions. This engineering guide explains when copper-based IMS becomes advantageous for high-power electronics, EV systems, power modules, and other demanding thermal-management applications, while showing when aluminum IMS remains the more practical solution. Learn how ChengYue evaluates the complete thermal path to select the right IMS construction for each application.