Patent ID: 8269310

Claim:
A storage capacitor having an increased aperture ratio, which is formed with a thin-film-transistor simultaneously, comprising: a substrate; a metal layer formed on said substrate; a first dielectric layer covered on said metal layer; a second dielectric layer covered on said first dielectric layer, wherein said second dielectric layer includes a portion correspondingly disposed over said metal layer that a thickness of said portion is less than another thickness of other remaining portions of said second dielectric layer, a distance from the substrate to a top of the portion is greater than a distance from the substrate to a top of the remaining portions; and an electrode layer disposed on said second dielectric layer, wherein an area of said electrode layer is reduced proportionally to a reduction of said thickness of said portion while keeping a capacitance of said storage capacitor constant, wherein said first dielectric layer and said second dielectric layer are made of silicon nitride.