Patent ID: 7288440

Claim:
A method of manufacturing a semiconductor device, comprising the steps of: (a) providing a substrate; (b) mounting a semiconductor chip over the substrate; (c) placing the substrate with the semiconductor chip mounted thereover over a molding surface of a molding die for resin molding; (d) holding the substrate so as to be sandwiched by both a first die and a second die of the molding die; and (e) injecting a sealing resin into a cavity of the molding die, wherein the substrate is a multi-layer wiring substrate, wherein the multi-layer wiring substrate has a stacked structure of resin and metallic foil, wherein the first die of the molding die has an elastic structure able to operate in a direction intersecting the molding surface, and wherein in the step (d), the first die is pushed down by a projecting portion formed in a molding surface of either the first die or the second die after abutment of the molding surface of the second die of the molding die against the substrate.