Patent ID: 8597989

Claim:
A method of manufacturing a semiconductor device comprising: (a) preparing a wiring member having a top surface over which a semiconductor chip is mounted, (b) disposing the wiring member on a die surface of a resin molding die having a cavity such that the semiconductor chip is located in the cavity of the resin molding die, and (c) forming a sealing body resin-sealing the semiconductor chip by injecting a resin into the cavity of the resin molding die, wherein the cavity of the resin molding die has a bottom surface, a first side surface, and a second side surface, a radius of an inner arc composed of portions of the bottom and first side surfaces being longer than a radius of an inner arc composed of portions of the first and second side surfaces, and wherein after the step (c), the sealing body has a top sealing surface, a first sealing side surface, and a second sealing side surface respectively formed by the bottom, first side, and second side surfaces of the cavity of the resin molding die, a radius of an inner arc composed of portions of the top sealing and first sealing side surfaces being longer than a radius of an inner arc composed of portions the first and second sealing side surfaces.