Patent ID: 8349661
Filing Date: 2013-01-08
Classification: H01L

Abstract:
1. A manufacturing method of a semiconductor device having a sealing body including an upper surface, and a first side surface on which an air vent resin is formed and which is adjacent to the upper surface, the method comprising the steps of: (a) preparing a resin molding die in which a cavity corresponding to a shape of the sealing body is formed on at least one of a pair of a first die and a second die, and which includes an injection gate and an air vent adjacent to the cavity, (b) arranging a plate-like member with a semiconductor chip mounted between the first die and the second die, and clamping the first die and the second die with the semiconductor chip covered with the cavity, and (c) injecting a sealing resin from the injection gate into the cavity to form the sealing body over the plate-like member, wherein the cavity of the resin molding die includes a corner part for forming an edge part of the sealing body including the first side surface corresponding to the air vent which is farthest from the injection gate, and the upper surface, and a radius of a cross section of an inner peripheral surface of the corner part of the cavity is longer than a radius of that of the other corner part of the cavity forming the other edge part of the sealing body.