Patent ID: 7445969
Filing Date: 2008-11-04
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device, comprising the steps of: (a) providing a substrate constituting a multi-layer wiring substrate, the multi-layer wiring substrate having a stacked structure of resin and metallic foil; (b) mounting a semiconductor chip over the substrate; (c) providing a molding die constituting a first die and a second die opposite to the first die, the second die having a cavity on a surface of the second die opposite to the molding surface of the first die, the second die having an air vent formed around the cavity, the second die having a through hole reaching to the air vent and a movable pin arranged in the through hole, the movable pin having a concaved portion formed in a surface of the movable pin opposite to the molding surface of the first die; (d) placing the substrate with the semiconductor chip mounted thereover over the molding surface of the molding die, for resin molding; (e) clamping the substrate so as to be sandwiched by both the first die and the second die of the molding die; and (f) injecting a sealing resin into a cavity of the molding die, wherein in the step (e), 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 contacting of the molding surface of the second die of the molding die against the substrate, wherein before clamping the substrate by the molding die, the movable pin is projected into the air vent, and wherein after clamping the substrate by the molding die, the movable pin is moved into the through hole.