Patent ID: 8334176

Claim:
A method of manufacturing a semiconductor device, comprising the steps of: mounting a lead frame in a recessed portion of a lower die; bringing said lower die and an upper die to overlap each other so that means for sliding said lead frame slides said lead frame toward injection surfaces, one of which is the side surface of said recessed portion of said lower die at which a gate opens and the other of which is the side surface of a recessed portion of said upper die at which said gate opens, said sliding means being formed on said recessed portion of said lower die or on said recessed portion of said upper die; clamping said lower die and said upper die together so that at least one projection formed on said upper die crushes down an end portion of said lead frame so as to form lateral projections on the left and right sides of said gate, said lateral projections blocking up the gap between said injection surfaces and said lead frame; and injecting a molding resin through said gate.