Patent ID: 6501637
Filing Date: 2002-12-31
Classification: H01G

Abstract:
A trimmer capacitor comprising:a stator having an upper surface and a lower surface, and a substantially semicircular fixed electrode mounted on the upper surface of the stator; and anchor portions arranged so as to be stepped down from the surface of the fixed electrode and embedded in the vicinity of the upper surface of the stator at tip portions of the fixed electrode; a dielectric ceramic plate having an upper surface and a lower surface, and a movable electrode mounted on the upper surface of the dielectric ceramic plate; wherein the lower surface of the dielectric ceramic plate is in contact with the upper surface of the stator and a capacitance is generated between the fixed electrode and the movable electrode opposed to each other through the dielectric ceramic plate and is adjustable by rotating the dielectric ceramic plate on the stator and changing the area of the fixed electrode opposed to the movable electrode.