Patent ID: 8910519

Claim:
A vibration gyro element comprising: a piezoelectric substrate that is line-symmetrical about each of two detection axes, the detection axes being parallel to at least one of a first surface and a second surface of the piezoelectric substrate and orthogonal to each other; and a plurality of pairs of electrodes provided on the first and the second surfaces of the piezoelectric substrate, wherein the vibration gyro element is configured such that, when a frequency signal is applied between at least a first pair of the plurality of pairs of surface electrodes, the piezoelectric substrate vibrates in a direction normal to one of the first and second surfaces, a Coriolis force applied to the piezoelectric substrate by rotation about each detection axis is detected on the basis of a voltage excited in at least a second pair of the plurality of pairs of surface electrodes, and wherein the piezoelectric substrate comprises a monocrystal classified into a trigonal system 3m point group, and a crystal axis X of a crystal coordinate system (X, Y, Z) coincides with any of axes each of which equally divides between two detection axes.