Patent ID: 8808837

Claim:
A flexible film comprising: a dielectric film; a metal layer comprising a first metal layer disposed on the dielectric film, a second metal layer disposed on the first metal layer, and a third metal layer disposed on the second metal layer; printed circuit patterns printed on the metal layer; an integrated circuit (IC) chip disposed on the metal layer; and at least one first hole and at least one second hole formed through the dielectric film and the metal layer, wherein each of the at least one first hole and the at least one second hole have an inner vacant space, wherein the printed circuit patterns include an inner lead connected to the IC chip and an outer lead positioned at an end of the dielectric film, wherein the first hole is positioned at one side of a region between the inner lead and the outer lead and the second hole is positioned at the other side of the region between the inner lead and the outer lead, wherein the first hole and the second hole are adjacent to the outer lead more than the inner lead, wherein a distance between the at least one first hole and the at least one second hole ranges from about 50-80% of a width of the dielectric film, wherein the at least one first hole and the at least one second hole are spaced apart from the printed circuit patterns, wherein the first metal layer is a sputtered metal layer comprising an alloy of nickel and chromium, wherein the second metal layer is a sputtered metal layer comprising copper, and wherein the third metal layer is an electroplated metal layer comprising copper or gold.