Patent ID: 8241958

Claim:
A method of manufacturing a semiconductor device, the method comprising: providing a lead frame comprising an island having a first main surface and a second main surface opposite from the first main surface and a lead elongated in a first direction in plan view of the lead frame and having one end located close to the island; mounting a semiconductor element on the first main surface of the island; electrically connecting an electrode of the semiconductor element to the lead; placing the island, the semiconductor element mounted on the island and part of the lead in a cavity of a mold for injection molding; and injecting a liquefied or semi-solid sealing resin into the cavity of the mold through a gate having a lower end lower than the second main surface of the island so that the sealing resin flows under the island, wherein a side of the island has an inclined surface between the first main surface and the second main surface along a cross section of the lead frame, and the inclined surface faces the gate during the injection so that the sealing resin hits the inclined surface.