Patent ID: 8598693

Claim:
A semiconductor device comprising: a central structure that includes a die pad and a semiconductor chip mounted on one plane of the die pad; a plurality of lead terminals that is spaced from the die pad and is disposed at the periphery of the die pad along an outer edge of the die pad; a hanging lead that has one end connected to the die pad and extends obliquely with respect to the one plane of the die pad in a direction away from the die pad; and a sealing resin that seals the central structure, a part of each of the plurality of lead terminals, and the hanging lead, wherein a rear surface of the die pad opposite to the one plane is formed to be exposed from one plane of the sealing resin, a concave portion which penetrates only the sealing resin, the concave portion being disposed to be parallel with at least one first side of an outermost edge of the central structure and a second side adjacent to the first side, respectively, is formed in the one plane of the sealing resin, and a depth of the concave portion at a location under the hanging lead is shallower than that at a location other than the location under the hanging lead, or the concave portion is not formed at the location under the hanging lead.