Seiko Epson Corporation

Takumi Suzuki

Matsutaro Naito

Go Yamashita

Kenji Komine

Jun Nishide

Toshiaki Sato

Wataru Ikegami

A resonator includes: a resonator element including a quartz crystal substrate that includes a first area performing a thickness-shear vibration and a second area with a thickness thinner than the first area and located around the first area; and a base substrate to which the second area of the resonator element on one edge side thereof is attached via a bonding material. The quartz crystal substrate has a major surface that is a surface including an X-axis and a Z'-axis, and has a thickness in a direction along a Y&#x2032;-axis. The resonator satisfies the relation: 1.5&#xd7;&#x3bb;&#x2266;Xp where Xp is the maximum length of an area of the second area where the bonding material is bonded along the X-axis in a plan view and &#x3bb; is the wavelength of a flexural vibration occurring in the quartz crystal substrate.

Resonator, resonator device, oscillator, electronic apparatus, and moving object

A resonating element has a quartz crystal substrate having a vibrating portion and a thin-walled portion that is thinner than the vibrating portion, and a pair of excitation electrodes respectively disposed on opposite surfaces of the vibrating portion. Moreover, in the excitation electrode, each of a pair of sides arranged in a Z'-axis direction is convexly curved toward the center so that the excitation electrode has a constricted portion in which a length in the Z&#x2032;-axis direction increases gradually from a central portion toward both ends in an X-axis direction.

Resonating element, resonator, oscillator, electronic apparatus, and mobile object

Growing community of inventors

Minowa, Japan

Takumi Suzuki