Seiko Epson Corporation

Wataru Ikegami

Go Yamashita

Kenji Komine

Takumi Suzuki

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.

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Ina, Japan

Wataru Ikegami