Patent ID: 7923367

Claim:
A method for manufacturing a multilayer wiring substrate mounted with an electronic component, comprising: preparing a plate-like core material layer having a wiring and a first opening, the wiring including a plurality of connection conductor sections formed around the first opening on one surface of the core material layer; forming, on the one surface of the core material layer, a resin layer having a second opening which is greater than the first opening in such a way that the plurality of connection conductor sections are exposed within the second opening; forming a second resin layer having a third opening which is the same size as the first opening on the other surface of the core material layer in such a way that the third opening is aligned to the first opening; bonding a supporting layer to the second resin layer; mounting the electronic component on a surface of the supporting layer within the first and third openings; electrically connecting the electronic component to the plurality of connection conductor sections by means of bonding wires; and filling the first, second, and third openings with a resin in order to seal the electronic component and the bonding wires.