Patent ID: 9712110
Date: 2017-07-18
CPC Classifications: H03B,H03H

Claim:
1. A resonator element comprising: a quartz crystal substrate in which an X axis of an orthogonal coordinate system having the X axis serving as an electric axis, a Y axis serving as a mechanical axis, and a Z axis serving as an optical axis, which are crystallographic axes of quartz crystal, is set as a rotation axis, an axis inclined from the Z axis so that a +Z side is rotated in a −Y direction of the Y axis is set as a Z′ axis, an axis inclined from the Y axis so that a +Y side is rotated in a +Z direction of the Z axis is set as a Y′ axis, a plane including the X and Z′ axes is set as a main plane, and the direction oriented along the Y′ axis is set as a thickness direction; and a pair of electrode pads, wherein the quartz crystal substrate includes wherein the one pair of electrode pads are disposed to be lined in a direction oriented along the Z′ axis at the one end side of the second region in the direction oriented along the X axis, wherein the first protrusion is present between the one pair of electrode pads, and wherein when Lx is a length of the first protrusion along the X axis and λ is a wavelength of flexural vibration generated in the quartz crystal substrate, a relation of “λ/2×(2n+1)−0.1λ≦Lx≦λ/2×(2n+1)+0.1λ” (where n is a positive integer) is satisfied.