Patent ID: 7646583

Claim:
A common centroid symmetric structure capacitor, comprising: a first metal layer, having a first set of metal wires and a second set of metal wires, the first set and the second set each having a plurality of metal wires, wherein each of the metal wires in the first set and each of the metal wires in the second set are arranged in an interlaced manner; a second metal layer, adjacent to the first metal layer and having a third set of metal wires and a fourth set of metal wires, the third set and the fourth set each having a plurality of metal wires, wherein each of the metal wires in the third set and each of the metal wires in the fourth set are arranged in an interlaced manner; a third metal layer, adjacent to the first metal layer and having a fifth set of metal wires and a sixth set of metal wires, the fifth set and the sixth set each having a plurality of metal wires, wherein each of the metal wires in the fifth set and each of the metal wires in the sixth set are arranged in an interlaced manner, and the second metal layer and the third metal layer are arranged symmetrically about a diagonal line; and a fourth metal layer, adjacent to the second metal layer and having a seventh set of metal wires and an eighth set of metal wires, the seventh set and the eighth set each having a plurality of metal wires, wherein each of the metal wires in the seventh set and each of the metal wires in the eighth set are arranged in an interlaced manner, and the first metal layer and the fourth metal layer are arranged symmetrically about an another diagonal line; wherein each of the metal wires in the first set to the eighth set of metal wires is in an L-shape; and wherein each of the metal wires on the first metal layer and each of the metal wires on the fourth metal layer are opposite to each other by an L-shaped opening, and each of the metal wires on the second metal layer and each of the metal wires on the third metal layer are opposite to each other by an L-shaped opening.