Patent ID: 8181521

Claim:
A yaw rate sensor of a surface acoustic wave, comprising: a substrate; an exciting electrode that transmits a surface acoustic wave through a surface of the substrate to generate a standing wave from the surface acoustic wave in an area of the surface of the substrate; a plurality of perturbative weights, disposed on the area of the surface of the substrate in which the standing wave is formed, which is oscillated by the standing wave on the substrate; and a detecting unit that is formed for the plurality of perturbative weights on the substrate in a direction orthogonal to a propagation direction of the surface acoustic wave, which detects an acoustic wave which is generated based on a Coriolis force induced in response to a yaw applied to the plurality of perturbative weights, wherein the exciting electrode, the plurality of perturbative weights, and the detecting unit are, respectively, line-symmetric with respect to a driving axis which is a straight line extending along the propagation direction of the surface acoustic wave and passes through a center position of the plurality of perturbative weights.