Patent ID: 8058713

Claim:
A COF package comprising: a tape substrate; and a rectangular semiconductor chip mounted over the tape substrate with a chip surface thereof being opposite to the tape substrate, said tape substrate including a rectangular chip mounting area and a chip non-mounting area, a plurality of external input terminals extending in a first direction and a plurality of external output terminals provided in the chip non-mounting area, a plurality of input wirings provided from the chip non-mounting area to the chip mounting area and connected to the external input terminals respectively, a plurality of output wirings provided from the chip non-mounting area to the chip mounting area and connected to the external output terminals respectively, a plurality of internal input wirings which are provided from the chip non-mounting area to the chip mounting area and provided between the input wirings and which are connected to the external input terminals, respectively, and a dummy wiring provided from the chip non-mounting area to the chip mounting area and provided between the internal input wirings, the dummy wiring extending in a direction parallel to the first direction, and said semiconductor chip including a plurality of input electrodes provided along one side of the semiconductor chip extending over the chip surface and connected to the input wirings respectively, a plurality of output electrodes provided along a periphery extending over the chip surface and connected to the output wirings respectively, internal input electrodes provided over the chip surface and between the input and output electrodes, and connected to the internal input wirings respectively, and a dummy electrode provided spaced from each of the input electrodes along the one side lying over the chip surface and connected to the dummy wiring.