Patent ID: 8062571

Claim:
A resin sealing method in a stacked wiring substrate, comprising the steps of: preparing a resin sealing device and a stacked wiring substrate, the resin sealing device including a lower die, an upper die which is arranged over the lower die, on a lower surface side of which a concave portion having a bottom surface is provided, and to the bottom surface peripheral portion of the concave portion of which a projection portion projecting in relation to the remaining bottom surface toward an opening portion side of the concave portion to raise partially the bottom surface is provided, and a protection film provided on a lower surface side of the upper die and adhered along a concave surface of the concave portion by adsorbing, and the stacked wiring substrate constructed by stacking a plurality of wiring substrates via connection bump; and sealing the stacked wiring substrate with a resin by making a fused resin flow into a cavity including space between the plurality of wiring substrates from a resin supplying portion, in a state that the stacked wiring substrate is arranged and sandwiched between the lower die and the concave portion of the upper die, with the partially raised projection portion of the concave portion being directly opposed to a peripheral portion of the uppermost wiring substrate and the protection film contacting the overall upper surface of the uppermost wiring substrate.