Quartz crystal unit, quartz crystal oscillator and electronic apparatus
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United States of America Patent
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Dec 8, 2015
Grant Date -
Jul 11, 2013
app pub date -
Jan 17, 2013
filing date -
Jun 30, 2003
priority date (Note) -
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Abstract
A quartz crystal unit comprises a quartz crystal tuning fork resonator having a quartz crystal tuning fork base, and first and second quartz crystal tuning fork arms. Each of the first and second quartz crystal tuning fork arms has a first main surface and a second main surface opposite the first main surface, and at least one groove formed in at least one of the first and second main surfaces of each of the first and second quartz crystal tuning fork arms. At least one mounting arm having a width less than 0.45 mm protrudes from the quartz crystal tuning fork base, and the overall length of the quartz crystal tuning fork resonator is less than 2.1 mm.
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