Patent ID: 7916484

Claim:
A heat sink, comprising: a metallic heat conducting layer; a non-metallic heatsink layer combined with the metallic heat conducting layer; a hollow receiving space defined between the metallic heat conducting layer and the non-metallic heatsink layer; wherein the non-metallic heatsink layer is primarily made of non-metallic material; the non-metallic heatsink layer has a porous structure connected to the hollow receiving space; the hollow receiving space is formed by the metallic heat conducting layer; the metallic heat conducting layer has a hollow inside defining the hollow receiving space and has open end for mounting the non-metallic heatsink layer; the hollow receiving space has an open end sealed by the non-metallic heatsink layer; the non-metallic heatsink layer is fully hidden in the hollow receiving space; the non-metallic heatsink layer is fully hidden in and flush with the open end of the metallic heat conducting layer.