Patent ID: RE43380

Claim:
A semiconductor device comprising: a first semiconductor element that includes: a semiconductor substrate, a plurality of connecting pads, a plurality of columnar electrodes for external connection which are connected to the connecting pads, and a sealing film covering the semiconductor substrate between the columnar electrodes such that an upper surface of the sealing film is flush with upper surfaces of the columnar electrodes; an insulation member provided at a periphery of the first semiconductor element; an upper wiring structure formed on an upper surface of the first semiconductor element and the insulation member; a lower wiring structure formed on a lower surface of the first semiconductor element and the insulation member; and a second semiconductor element that is mounted on at least one of the upper wiring structure and the lower wiring structure; wherein the first semiconductor element comprises an overcoat covering the semiconductor substrate except for a center of each of the connecting pads and wirings which are formed on the overcoat and which connect the connecting pads to the columnar electrodes, respectively.