Patent ID: 8304862

Claim:
A semiconductor package comprising: a wiring board; and a semiconductor device disposed on the wiring board; wherein the semiconductor device comprises: a semiconductor chip having a first surface and a second surface opposite to the first surface; and a penetration electrode which penetrates the semiconductor chip, the penetration electrode having a first supporting portion fixed on the first surface of the semiconductor chip, a second supporting portion fixed on the second surface of the semiconductor chip, and a penetration portion arranged in a space portion formed in the semiconductor chip, the penetration electrode penetrating the semiconductor chip in such a manner that the penetration portion is entirely separated from a wall plane of the semiconductor chip by at least the space portion, said space portion being empty space; and the wiring board and the semiconductor device are electrically connected via the penetration electrode, wherein a wall plane of the semiconductor chip within the space portion is covered with an insulating film, and the penetration portion is entirely separated from the insulating film covering the wall plane of the semiconductor chip by the space portion, and a surface of the penetration portion is covered by an insulating film, and the insulating film covering the penetration portion is separated from the insulating film covering the wall plane of the semiconductor chip by the space portion.