At-cut quartz-crystal vibrating pieces and devices, and methods for manufacturing same
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United States of America Patent
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Jul 15, 2014
Grant Date -
Jul 5, 2012
app pub date -
Dec 22, 2011
filing date -
Jan 5, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
AT-cut quartz-crystal vibrating pieces and corresponding quartz-crystal devices are disclosed each having a vibrating portion surrounded by a frame portion across a through-slot configured to provide a wide vibrating portion. An exemplary vibrating piece has a quartz-crystal vibrating portion that vibrates when electrically energized, a frame portion surrounding the vibrating portion, and a through-slot defined between the vibrating portion and the frame portion. The through-slot includes a first through-slot extending in the X-axis direction along +Z′-edge of the vibrating portion, and a second through-slot extending in the X-axis direction along the −Z′-edge of the vibrating portion. The first through-slot has a different width than the second through-slot.
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