Patent ID: 9102067
Filing Date: 2015-08-11
Classification: B25J,G01L,H01L,Y10S

Abstract:
1. A sensor element comprising: a piezoelectric substrate made of a trigonal single crystal having crystal axes; a first electrode on a first surface of the piezoelectric substrate; and a second electrode on a second surface, the first and second surfaces being on opposite sides of the piezoelectric substrate, wherein the first surface of the piezoelectric substrate includes an electrical axis, a mechanical axis, and an optical axis of the crystal axes, and an angle θ between the first surface and a plane including the electrical axis and an optical axis of the crystal axes is 0°<θ<20°, a portion of an outer side surface that is different from the first and second surfaces of the piezoelectric substrate includes a plane, and an angle λ between the plane of the outer side surface and a plane including an electrical axis and the optical axis of the crystal axes is 25°≦λ≦85°.