Patent ID: 7981741

Claim:
A method of making a capacitor, comprising in sequence: providing a metallic foil having a thickness of between about 1 and 100 microns, and having a first surface; annealing the metallic foil for a first time, wherein the metallic foil annealed for the first time obtains grain sizes substantially equal in size to the thickness of the foil; polishing the first surface of the metallic foil; forming a capacitor over the first surface of the metallic foil, wherein the forming comprises: depositing a thin-film dielectric layer over the first surface of the metallic foil when said metallic foil is heated at a temperature between about 400° C. and 900° C., the dielectric layer comprising a material of high dielectric constant; firing the dielectric layer; and forming a conductive layer over the dielectric layer, wherein the dielectric layer of the capacitor exhibits columnar grains.