http://www.szospcb.com/copper-core-pcb/ Copper Core PCB in stock 鈼?Product Introduction: Thermoelectric Separation Copper Core PCB is a copper substrate using a thermoelectric separation structure,the circuit part and the thermal part of the PCB is in different layers of the circuit, and the part of the thermal layer directly contacts the heat dissipation part of the light wire to achieve the best heat dissipation. Thermal conductivity (zero thermal resistance). 鈼?Product Specification锛?/strong> Material:Copper/Aluminum/IronSolder Mask:White TCE4.0w/(m*k)Min Trace Width/Spacing:8/8mil鈫?/p> Layers:2-layerMin Hole Size.3mm