Patent ID: 8237252

Claim:
A method of making a semiconductor device, comprising: forming a first thermally conductive layer over a first surface of a semiconductor die; providing a sacrificial carrier; mounting a second surface of the semiconductor die, opposite the first surface of the semiconductor die, to the sacrificial carrier; depositing an encapsulant over the first thermally conductive layer and sacrificial carrier; planarizing the encapsulant to expose the first thermally conductive layer; removing the sacrificial carrier; forming a first insulating layer over the second surface of the semiconductor die and a first surface of the encapsulant; removing a portion of the first insulating layer over the second surface of the semiconductor die; forming a second thermally conductive layer over the second surface of the semiconductor die within the removed portion of the first insulating layer; and forming an electrically conductive layer in the insulating layer around the second thermally conductive layer.