Patent ID: 7839652

Claim:
A semiconductor device, which has a plurality of packaging pads, comprising: a semiconductor element; and an interposer substrate on which the semiconductor element is mounted, wherein the interposer substrate includes: a first electrode pad, which is connected to the semiconductor element by a first signal line, and which is also connected, by a via, to a pad provided on a reverse face of the interposer substrate, a second electrode pad, which is connected to the first electrode pad by a second signal line, and which is also connected, by a via, to a pad provided on the reverse face of the interposer substrate, and a third signal line, which extends from the second electrode pad to the outer edge of the interposer substrate, wherein the first and second electrode pads and the third signal line are formed on an obverse surface of the interposer substrate, wherein the second electrode pad is located nearer to an outer edge of the interposer substrate than the first electrode pad, and wherein the only electrical path from the second electrode pad to the semiconductor element is through the first electrode pad.