Patent ID: 7928557

Claim:
A stacked package comprising: an upper package, including: a substrate having an upper surface and a lower surface; a solder resist formed on the upper surface of the substrate; a solder resist formed on the lower surface of the substrate; electrode pads being exposed from opening portions in the solder resist formed on the upper surface of the substrate; electrode pads being exposed from opening portions in the solder resist formed on the lower surface of the substrate; a semiconductor element mounted on one of the upper surface or the lower surface of the substrate; and solder joint sections formed on respective electrode pads exposed from the opening portions in the solder resist formed on the lower surface of the substrate; a lower package, including: a substrate having an upper surface and a lower surface; a solder resist formed on the upper surface of the substrate of the lower package; a solder resist formed on the lower surface of the substrate of the lower package; electrode pads being exposed from opening portions in the solder resist formed on the upper surface of the substrate of the lower package; electrode pads being exposed from opening portions in the solder resist formed on the lower surface of the substrate of the lower package; a semiconductor element mounted on one of the upper surface or the lower surface of the substrate of the lower package inside of the electrode pads; solder joint sections formed on respective electrode pads exposed from the opening portions in the solder resist formed on the upper surface of the substrate; and external connection terminals formed on respective electrode pads exposed from the opening portions in the solder resist formed on the lower surface of the substrate of the lower package; and a connection section electrically connecting the upper package and the lower package; wherein the connection section includes a pillar-like member supporting the substrate of the upper package on the substrate of the lower package and forming a space between the upper package the lower package, ends of the pillar-like member being embedded in the solder joint sections of the upper and lower packages, and the semiconductor element of the lower package being disposed in the space, and wherein the elastically-deformable material has an elasticity modulus of 100-230 gigapascals.