Patent ID: 8363398

Claim:
An electronic device comprising: a casing; an electronic component accommodated in the casing; and a composite heat conductive layer between the casing and the electronic component, the composite heat conductive layer comprising a graphite layer and a thermal pad layer, the graphite layer being a sheet of graphite; wherein the thermal pad layer is attached to a top surface of the electronic component, the graphite layer is attached to an inner surface of the casing, the thermal pad layer is located between the electronic component and the graphite layer, the graphite layer is located between the casing and the thermal pad layer, a heat conductive coefficient of the graphite layer along a horizontal spreading direction thereof exceeds that along a vertical thickness direction thereof, and a surface area of the graphite layer is not less than that of the top surface of the electronic component, such that heat generated by the electronic component is evenly transferred and spread to the casing via the graphite layer of the composite heat conductive layer.