Seiko Epson Corporation

Hideo Endo

Matsutaro Naito

Toshihiro Il

When a size from a main surface of an outer edge to a step of a first stage of a vibration section is Md1, a size from the step of the first stage to a step of a second stage is Md2, a density of materials of the substrate is d, a density of materials of the excitation electrode is d, and a thickness of the excitation electrode on a main surface of a mesa of the second stage is t, a relationship of ((Md2+(d/d)&#xd7;t))/Md1&#x2266;1.4 is satisfied.

Resonator element, resonator, electronic device and electronic apparatus

When a length along a vibrating direction of the thickness shear vibration of a multi-stage type mesa substrate of A resonator element is x, a thickness of the vibration section is t, and a distance between the vibration section and the bonding region is y, y is in a range of &#x2212;0.0151&#xd7;(x/t)+0.3471&#x2266;y&#x2266;&#x2212;0.0121&#xd7;(x/t)+0.3471.

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Kamiina, Japan

Hideo Endo