Patent ID: 8106518

Claim:
A semiconductor device comprising: (a) a semiconductor substrate having a first main surface and a second main surface positioned on opposite sides to each other in a thickness direction of the semiconductor substrate; (b) a plurality of elements formed on the first main surface of the semiconductor substrate; (c) an interlayer insulating film formed on the first main surface of the semiconductor substrate so as to cover the plurality of elements; (d) a pad formed on a surface of the interlayer insulating film so as to be electrically connected with the plurality of elements; (e) a bump-shaped first electrode formed on the pad so as to be electrically connected with the pad; and (f) a second electrode formed on the second main surface of the semiconductor substrate so as to be electrically connected with the first electrode, wherein the first electrode has a protruding portion penetrating through the pad and protruding toward the semiconductor substrate side, and the second electrode is formed so as to cover the inside of a second-electrode hole portion which reaches the protruding portion of the first electrode from the second main surface side toward the first main surface side of the semiconductor substrate and does not reach the pad so that the second electrode is electrically connected with the first electrode.