Patent ID: 7724494
Filing Date: 2010-05-25
Classification: H01G

Abstract:
1. A variable capacitor comprising: a substrate; a first electrode formed over the substrate; a second electrode film formed over the first electrode in facing relation thereto, the second electrode film being elongate in a direction crossing the first electrode and including a first lengthwise edge and a second lengthwise edge opposite to the first lengthwise edge, a third widthwise edge different from the first and second lengthwise edges, and a fourth widthwise edge opposite to the third widthwise edge, the first and second lengthwise edges being movable relative to the first electrode, the third and fourth widthwise edges being fixed to the substrate, the first and second lengthwise edges as well as the third and fourth widthwise edges defining an outer peripheral contour of the second electrode film; and an intermediate anchor portion located between the first and second lengthwise edges of the second electrode film for fixing the first electrode to the second electrode film and for preventing the second electrode film from moving relative to the first electrode at the intermediate anchor portion.