Patent ID: 7427810

Claim:
A semiconductor device comprising: a first semiconductor device including a first semiconductor element having main and back surfaces, and side surfaces between the main and back surfaces, and ball bumps located above the back surfaces of the first semiconductor element, the ball bumps being electrically connected to the first semiconductor element, the back surface having an area without ball bumps; and a second semiconductor device mounted so as to oppose the back surface of the first semiconductor element, the second semiconductor device including a second semiconductor element having a main surface, a plurality of terminals on the main surface of the second semiconductor element, and a resin covering the main surface of the second semiconductor element and side surfaces of the plurality of terminals, so that a back surface of the second semiconductor element is exposed from the resin, wherein the main and side surfaces of the first semiconductor element are exposed, wherein the second semiconductor device is mounted on the back surface of the first semiconductor element so that the main surface of the second semiconductor element faces the back surface of the first semiconductor element.