Patent ID: 8222720
Filing Date: 2012-07-17
Classification: H01L

Abstract:
1. A semiconductor device comprising: a plurality of leads each having a sealing surface, a mounting surface opposite to said sealing surface, an inner surface disposed between said sealing surface and said mounting surface, an outer surface disposed between said sealing surface and said mounting surface and opposite to said inner surface, and a plurality of side surfaces each disposed between said sealing surface and said mounting surface and between said inner surface and said outer surface; a chip mounting portion having a chip supporting surface and a back surface opposite to said chip supporting surface, and arranged between said leads in a plan view; a semiconductor chip having a front surface, a plurality of electrodes formed on said front surface, and rear surface opposite to said front surface, and mounted on said chip supporting surface of said chip mounting portion; a plurality of wires electrically connecting said electrodes with said leads, respectively; and a sealing member having an upper surface, a lower surface opposite to said upper surface, and a plurality of side surfaces disposed between said upper surface and said lower surface, and sealing said semiconductor chip, said leads and said wires such that said mounting surface of each of said leads is exposed from said lower surface of said sealing member and such that a part of said sealing member contacts with said rear surface of said semiconductor chip; wherein said inner surface of each of said leads faces said chip mounting portion; wherein each of said leads has a first inner end portion at an intersection of said sealing surface with said inner surface, and a second inner end portion at an intersection of said mounting surface with said inner surface; wherein said second inner end portion is closer to said chip mounting portion than said first inner end portion in said plan view; and wherein a width of said sealing surface in a intersecting direction intersecting with a respective extending direction of each of said leads is wider than that of said mounting surface in said intersecting direction.