Patent ID: 9503045
Filing Date: 2016-11-22
CPC Classification: H03B,H03H

Claim Text:
1. A resonator element comprising: a thick section; a middle section that is located adjacent to the thick section and is thinner than the thick section; and a thin section that is located around the thick section and the middle section, and is thinner than the middle section, wherein at least the thick section performs thickness shear vibration, wherein a first step difference is provided at a boundary between the thick section and the middle section, and a second step difference is provided at a boundary between the middle section and the thin section, in a direction of the thickness shear vibration, wherein a first antinode of flexural vibration is located between the first step difference and the second step difference, and wherein, when, in the direction of the thickness shear vibration, a distance between the first antinode and the first step difference is indicated by d1, a distance between the first antinode and the second step difference is indicated by d2, and a wavelength of the flexural vibration is indicated by λ, a relationship of 0≦d1≦λ/8 and 0≦d2≦λ/8 is satisfied.