Patent ID: 8441115

Claim:
A semiconductor device comprising: a plurality of stacked semiconductor chips; a thermal conductivity part mounted over a device formation surface of a topmost one of the stacked semiconductor chips; first bonding layers provided between adjacent ones of the stacked semiconductor chips; a second bonding layer provided between the thermal conductivity part and the topmost one of the stacked semiconductor chips; and an encapsulation resin that seals the semiconductor chips, wherein the thermal conductivity part is exposed from a surface of the encapsulation resin; wherein adhesive sheets are hardened to form the first and second bonding layers; wherein each adhesive sheet is a different material from the encapsulation resin; wherein an amount of heat generation from the topmost one of the stacked semiconductor chips is larger than an amount of heat generation from another of the stacked semiconductor chips below said topmost one; and wherein a thickness of the second bonding layer is less than a thickness of one of the first bonding layers.