RESONATOR ELEMENT, RESONATOR, OSCILLATOR, ELECTRONIC APPARATUS, AND MOBILE OBJECT
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United States of America Patent
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Issued Date -
Jan 28, 2016
app pub date -
Jul 24, 2015
filing date -
Jul 25, 2014
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A resonator element includes a substrate region sandwiched by first and second excitation electrodes. The region is located within a quadrangle having four 90° corners, a pair of first sides along a thickness-shear vibration direction, and a pair of second sides perpendicular to the vibration direction. The region includes a side or a circular arc in contact with each of the first and second sides, and an outer edge recessed from at least two corners of the quadrangle in a direction intersecting the vibration direction. Further, assuming a maximum length of the region along the vibration direction is Lx, and a length of the outer edge along the vibration direction is lx, 13.7%≦(lx/Lx)≦46.0%.
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