Patent ID: 8115298

Claim:
A semiconductor device comprising: a semiconductor chip having a main surface on which a plurality of pads are formed; a tab supporting the semiconductor chip; a plurality of suspension leads formed integral with the tab; a plurality of leads located around the tab, and arranged between the suspension leads adjacent to each other; a plurality of wires electrically coupling the pads and the leads, respectively; and a seal portion sealing the semiconductor chip and the wires; wherein a shape in a plan view of the seal portion is comprised of a quadrangle; wherein in the seal portion, each of the suspension leads are extended from a central portion of the seal portion toward a corner portion of the seal portion; wherein in the seal portion, the leads are only extended in directions perpendicular to sides of the seal portion, respectively; wherein the leads includes first leads arranged next to the suspension leads, and second leads arranged farther from the suspension leads than the first leads; wherein each of the first leads has a first front end portion facing to the tab, a first back end portion opposed to the first front end portion, a first side portion facing to the suspension leads arranged next to the first leads, respectively, and a second side portion opposed to the first side portion; wherein a length of the first front end portion is smaller than that of the first back end portion; wherein a length of the first side portion is smaller than that of the second side portion; wherein the seal portion has an upper surface located at the main surface side of the semiconductor chip, and a lower surface opposed to the upper surface; and wherein the seal portion seals each of the leads such that a part of each of the leads is exposed from the lower surface of the seal portion.