Patent ID: 7397128

Claim:
A semiconductor device, comprising: a semiconductor substrate including a front surface, a back surface and four lateral faces, which connect a periphery of the front surface and a periphery of the back surface; a diffusion region in the semiconductor substrate; a pad electrode on the front surface of the semiconductor substrate, which is electrically connected to the diffusion region; a backside electrode on the back surface of the semiconductor substrate; a through-hole penetrating through the semiconductor substrate and located under the pad electrode; a feedthrough electrode, which electrically connects the pad electrode and the backside electrode through the semiconductor substrate and which is formed of a conductive material covering an inner wall of the through-hole or filled in the through-hole, and wherein the diffusion region is surrounded by an isolation region; the pad electrode is outside of the isolation region; and the diffusion region and the pad electrode are connected through a wiring.