Patent ID: RE42972

Claim:
A semiconductor device comprising: (a) a rigid substrate having a first main surface and a second main surface opposite to the first main surface; (b) a semiconductor pellet mounted on the first main surface of the rigid substrate, the semiconductor pellet having a plurality of semiconductor circuit elements and a plurality of bonding pads; (c) a plurality of electrode pads formed on the second main surface of the rigid substrate; and (d) a plurality of bonding wires for electrically connecting the bonding pads of the semiconductor pellet with the electrode pads; wherein the semiconductor pellet is mounted facedown on the rigid substrate, the rigid substrate has slits that extend from the first main surface to the second main surface and expose the bonding pads of the semiconductor pellet, the bonding wires extend through the slits in the rigid substrate to connect the bonding pads and the electrode pads, and bump electrodes are formed on said electrode pads.