Patent ID: 8587947

Claim:
A heat spreader to be mounted on an IC package, the IC package comprising: a circuit board; an IC chip mounted on one surface of the circuit board; and a plurality of connection terminals formed on the other surface of the circuit board, the heat spreader comprising: a top wall formed into a rectangular shape; a circumferential wall formed continuously from the top wall, the circumferential wall and the top wall defining a block-like cavity for enclosing the IC chip when the heat spreader is mounted on the IC package; and ear portions formed at lengthwise central portions of a facing pair of side walls of the circumferential wall so to extend outwardly from bottom edges of the facing pair of side walls, respectively, each of the ear portions comprising: a first arcwise portion outwardly extending from the bottom edge of the corresponding sidewall; and a second arcwise portion inwardly retracted from the bottom edge of the corresponding side wall.