Patent ID: 7435914

Claim:
A tape substrate comprising: a base film comprising a package area, a sprocket hole area disposed outside of the package area and comprising a plurality of sprocket holes, and a bent portion, wherein a chip mounting area is disposed in the package area, and no portion of any of the sprocket holes is disposed in the package area; wiring patterns provided on the base film, the wiring patterns comprising input wiring patterns extending from one side of the base film to the chip mounting area, and output wiring patterns extending from an opposite side of the base film to the chip mounting area; a protective layer provided on the wiring patterns and exposing respective ends of the input wiring patterns and of the output wiring patterns; and a plurality of stress-relieving holes disposed in the bent portion of the base film and extending across the package area, wherein at least one of the of stress-relieving holes is partially disposed in the package area and partially disposed in the sprocket hole area.