Patent ID: 8520388

Claim:
A heat-radiating component capable of being bonded via a thermal interface material to an electronic component mounted on a wiring board, the heat-radiating component comprising: a plate-like portion thermally bonded to the electronic component through the thermal interface material; and a foot portion formed on a surface which faces the electronic component, of the plate-like portion, wherein the foot portion is formed in a ring shape at a position which surrounds a region corresponding to a mounting area of the electronic component, on the inner side of the periphery of the plate-like portion, and the foot portion being bonded to the wiring board, wherein the plate-like portion has an outer part whose lower surface is flat over all in an outer region from the foot portion, and a region between the outer part of the plate-like portion and the wiring board is opened, and a large number of projected portions are provided at least on one surface of the plate-like portion on which the foot portion is formed, the projected portions being provided on the outer part of an outside of the foot portion.