Thermal conductivity is a key physical parameter that describes the thermal conductivity of a material. It is defined as the amount of heat transferred through an area of 1 square meter in 1 second when the temperature difference between the two surfaces of a 1-meter-thick material is 1 Kelvin under stable heat transfer conditions. The unit is watt per meter Kelvin (W/(m·K)
It is a parameter that measures the material's ability to transfer heat, and its unit is W/(m·K). The larger the value, the better the thermal conductivity. The common PCB material on the market is FR4, which has almost no heat dissipation ability. Aluminum substrate has better heat dissipation, and the common thermal conductivity specifications are 0.6W/(m·K) , 0.8W/(m·K), 1.0W/(m·K) and 2.0W/(m·K).