Patent ID: 7094459

Claim:
A thermally conductive sheet for cooling an electronic component having a terminal and a top surface and being mounted on a substrate with an electric circuit, wherein the terminal of the electronic component electrically connects the electronic component to the electric circuit, said thermally conductive sheet comprising: a thermally conductive layer including matrix and thermally conductive filler contained in the matrix, wherein the thermally conductive layer has a first portion and a second portion; and an insulation layer disposed at the first portion of the thermally conductive layer so as to allow the second portion of the thermally conductive layer to be uncovered by the insulation layer, wherein, when the thermally conductive sheet is placed on the substrate and the electronic component, the insulation layer interposes between the first portion of the thermally conductive layer and the terminal of the electronic component and the electric circuit of the substrate to prevent the terminal and the electric circuit from contacting the first portion of the thermally conductive layer, while the second portion of the thermally conductive layer contacts substantially the entire area of the top surface of the electronic component for dissipating heat generated by the electronic component.