Patent ID: 8017452

Claim:
A method of manufacturing a semiconductor device having a double-sided electrode structure in which a circuit element, including a semiconductor chip, is disposed and resin-sealed, and external connection electrodes connected to the circuit element are disposed on a front face and a back face of the semiconductor device, the method comprising the steps of: disposing the circuit element on an organic substrate and connecting the circuit element to a wiring pattern provided on the organic substrate; forming internal connection electrodes on a support of a conductive material through electroforming such that the internal connection electrodes are integrally connected to the support of the conductive material; connecting first ends of the internal connection electrodes, which are integrally connected by the support of the conductive material, to the wiring pattern at predetermined positions; charging a resin after said first ends of the internal connection electrodes are connected to said wiring pattern; removing, after said resin for covering the circuit element is charged for resin sealing, the support of the conductive material so as to separate the internal connection electrodes from one another; using second ends of the internal connection electrodes as front face external connection electrodes on the front face; and connecting back face external connection electrodes on the back face to the wiring pattern via a conductor layer within the organic substrate.