Patent ID: 8405204

Claim:
A semiconductor package comprising: a package main body which includes a semiconductor device accommodating portion including a peripheral wall, a lid closing an opening at a first end of the peripheral wall, and a partition wall closing an opening at a second other end of the peripheral wall, the peripheral wall, together with the lid and the partition wall, defining an inner space accommodating a basic circuit including a semiconductor device, and the partition wall including inner side and outer side surfaces, the inner side surface including an area surrounded by the peripheral wall and facing the inner space, the outer side surface including an area located under and corresponding to the area of the inner side surface and facing in a direction away from the inner space, and the semiconductor device being thermally connected to the area of the inner side surface; a plurality of external connection terminal members which is connected to the basic circuit and which protrudes outside the package main body; and a cooling structure which is continuously formed on the area of the outer side surface of the partition wall with a same material as that of the package main body, and which reduces heat generated by the semiconductor device from the package main body, the cooling structure comprising a coolant flowing portion, the coolant flowing portion including a coolant supply port to which coolant is supplied, a coolant moving space which is positioned under the area of the outer side surface of the partition wall and in which the coolant moves along the area of the outer side surface of the partition wall, and a coolant discharge port which discharges the coolant supplied from the coolant supply port and moving in the coolant moving space, from the coolant moving space, the coolant flowing portion including a bottom wall facing the area of the outer side surface of the partition wall through the coolant moving space, the area of the outer side surface of the partition wall including a heat radiation area enlarging member protruding from the area of the outer side surface in the coolant moving space and being in contact with the bottom wall, and the coolant supply port and coolant discharge port being formed in the bottom wall and spaced from each other so that the heat radiation area enlarging member is positioned therebetween.