Copper-base PCB, Copper core PCB – Hitech Circuits Co., Limited Aluminum PCBs are common insulated metal substrate PCBs (IMSPC widely used for LED lights, automotive lighting, and other high thermal conductivity applications. The thermal conductivity of aluminum PCBs is usually 1W/mK or 2W/mK. If an aluminum PCB's thermal conductivity can't satisfy your expected application requirements, why not consider copper-based PCBs?

Copper-base PCBs have better thermal conductivity than aluminum PCBs and provide you with much more design possibilities.
A copper base PCB is a metal core PCB with a copper substrate.