Patent ID: 7561406

Claim:
A thin film capacitor comprising: a nickel substrate with nickel (Ni) purity of 99.99 weight percent or above, and a dielectric layer and an electrode layer disposed in this order on the nickel substrate, wherein the nickel substrate includes the impurities of iron (Fe) at 9 to 65 ppm, copper (Cu) at 6 to 25 ppm, manganese (Mn) at 2 to 10 ppm, and silicon (Si) at 2 to 6 ppm; and the nickel substrate can include one or more impurities selected from the group consisting of impurities of titanium (Ti) at 65 ppm or below, aluminum (Al) at 65 ppm or below, and chromium (Cr) at 65 ppm or below.