Patent ID: 7518691

Claim:
An electrooptical device comprising: a substrate having a first substrate wiring line and a second substrate wiring line formed on a first surface of the substrate; a semiconductor device mounted on the first surface of the substrate and overlapping the first and second substrate wiring lines, the semiconductor device including: a first input bump and a second input bump provided on a side of the semiconductor device that is mounted to the first surface of the substrate, and an output bump provided on the side of the semiconductor device, the second input bump being connected to the second substrate wiring line, the output bump being disposed on and connected to the first substrate wiring line; a base material overlapping the first surface of the substrate, the base material having a second surface facing the first surface, the second surface having an overlapping portion disposed on the first surface and a non-overlapping portion extending away from an end of the substrate; a first wiring line formed on the second surface of the base material on the overlapping and non-overlapping portions, the first wiring line protruding from the base material and extending continuously from the base material, over the first surface of the substrate, and to directly under the first input bump, the first wiring line being electrically and mechanically connected to the first input bump through only a single anisotropic conductive film; and a second wiring line formed on the overlapping and non-overlapping portions of the second surface of the base material, the second wiring line being electrically connected to the second input bump via the second substrate wiring line and two separate anisotropic conductive films.