Patent ID: 8637966

Claim:
A semiconductor device comprising: a die pad having an upper surface and a lower surface opposite to the upper surface; a plurality of leads arranged around the die pad; a first semiconductor chip having a first main surface, a first semiconductor element formed on the first main surface, a plurality of first electrode pads formed on the first main surface and electrically connected to the first semiconductor element, a first protective film formed on the first main surface such that the plurality of first electrode pads are exposed, and a first rear surface opposite to the first main surface, the first semiconductor chip being mounted on the die pad such that the first rear surface is opposed to the upper surface of the die pad; a second semiconductor chip having a second main surface, a second semiconductor element formed on the second main surface, a plurality of second electrode pads formed on the second main surface and electrically connected to the second semiconductor element, a second protective film formed on the second main surface such that the plurality of second electrode pads are exposed, and a second rear surface opposite to the second main surface, the second semiconductor chip being mounted on the first semiconductor chip such that the second rear surface is opposed to the first main surface of the first semiconductor chip; a plurality of first conductive members electrically connecting the plurality of first electrode pads with the plurality of leads, respectively; a plurality of second conductive members electrically connecting the plurality of first electrode pads with the plurality of second electrode pads, respectively; and a sealing member sealing the die pad, the first semiconductor chip, the second semiconductor chip, the plurality of first conductive members and the plurality of second conductive members such that the lower surface of the die pad is exposed, wherein the second protective film is comprised of a polymeric material containing benzocyclobutene in a backbone thereof as an organic monomer.