Patent ID: 8438922

Claim:
An oscillation angular velocity sensor comprising: a first oscillator and a second oscillator each including: a detector portion formed in one surface of a substrate, the detector portion including a stationary detector electrode, which is supported by the substrate, and a detector weight, which includes a movable detector electrode opposed to the stationary detector electrode and movable relative to the stationary detector electrode; and a driver portion formed in the one surface of the substrate, the driver portion including a driver weight, which includes a movable driver electrode configured to oscillate the detector portion in a driving direction perpendicular to a moving direction of the movable detector electrode, and a stationary driver electrode opposed to the movable driver electrode, wherein the oscillation angular velocity sensor is configured to, when an angular velocity occurs while the detector portion is oscillated, detect the angular velocity according to a variation in an electric capacitance, the variation being caused by change in a distance between the stationary detector electrode and the movable detector electrode moved by a Coriolis force applied to the detector portion, the driver weight of the first oscillator and the driver weight of the second oscillator are directly connected through a driver joint beam, the detector weight of the first oscillator and the detector weight of the second oscillator are directly connected through a detector joint beam, wherein the driver weight of the first oscillator is in a rectangular frame shape, the driver weight of the second oscillator is in a rectangular frame shape, the detector weight of the first oscillator is located inside of the driver weight of the first oscillator, the detector weight of the second oscillator is located inside of the driver weight of the second oscillator, the detector weight of the first oscillator and the detector weight of the second oscillator are higher than the driver weight of the first oscillator and the driver weight of the second oscillator relative to an other surface, which is a reference surface on an opposite side of the one surface of the substrate, the detector joint beam is located at a level higher than a level of the driver weight of the first oscillator and a level of the driver weight of the second oscillator, the detector joint beam straddles the driver weight of the first oscillator and the driver weight of the second oscillator to directly connect the detector weight of the first oscillator with the detector weight of the second oscillator, the driver joint beam is located at a level same as the level of the driver weight of the first oscillator and the level of the driver weight of the second oscillator, and the driver joint beam directly connects the driver weight of the first oscillator with the driver weight of the second oscillator.