Patent ID: 8618642

Claim:
A semiconductor device comprising: a semiconductor chip having an obverse surface over which a plurality of electrodes are formed, and a reverse surface opposite the obverse surface; a frame member having a first portion for mounting the semiconductor chip, a second portion formed to surround the first portion, a plurality of suspension leads each connected to the second portion, a plurality of leads disposed around the semiconductor chip and outside of the second portion, the first portion having a first area which is capable of mounting the semiconductor chip, the second portion having a second area which is capable of providing a wire connection; a plurality of first wires connecting selected first one of the plurality of electrodes of the semiconductor chip with the plurality of leads of the frame member; and a sealing body sealing the semiconductor chip, the plurality of first wires, and a part of each of the plurality of leads, wherein the semiconductor chip is mounted over the first area of the first portion of the frame member, wherein a first slit and a second slit are formed between the first and second portions, the first slit extends along an outer peripheral edge of the first portion, and a second slit extends from an end portion of the first slit, and wherein, in a plan view, a distance from a closest part of an outer peripheral edge of the second slit to an outer peripheral edge of the second portion is shorter than a distance from a closest part of an outer peripheral edge of the first slit to the outer peripheral edge of the second portion.