Patent ID: 8089777

Claim:
A semiconductor device comprising: an upper circuit board in which a plurality of substrates each including a via-hole and an internal wiring are stacked, the upper circuit board including a plurality of upper-layer wirings on an upper surface thereof and a plurality of lower-layer wirings on a lower surface thereof, the plurality of upper-layer wirings including at least first upper-layer wirings, and the plurality of lower-layer wirings including a plurality of first lower-layer wirings and a plurality of second lower-layer wirings; a first semiconductor structure body which is provided on the upper circuit board and is connected to the first upper-layer wirings; a lower circuit board which is provided on a peripheral part of a lower side of the upper circuit board, the lower circuit board including a plurality of external connection wirings that are connected to the second lower-layer wirings, and a first opening portion which exposes the first lower-layer wirings and second opening portions which expose the external connection wirings; a second semiconductor structure body which is disposed in the first opening portion of the lower circuit board, and which includes external connection electrodes that are connected to the first lower-layer wirings of the upper circuit board; and a plurality of conductive solids which are bonded to the external connection wirings via the second opening portions which expose the external connection wirings, each of the conductive solids having a height such that a lower surface of the conductive solid is positioned below a lower surface of the second semiconductor structure body in a state in which the conductive solid is connected to an external terminal; wherein the first semiconductor structure body includes a semiconductor substrate having a plurality of connection pads, an insulation film covering the semiconductor substrate and having a plurality of opening portions which expose the connection pads, wirings which are formed on the insulation film and are electrically connected to the connection pads via the opening Portions, and an overcoat film covering the insulation film and including opening portions which expose parts of the wirings.