Piezoelectric vibrating piece and piezoelectric device
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United States of America Patent
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May 19, 2015
Grant Date -
May 2, 2013
app pub date -
Oct 30, 2012
filing date -
Nov 2, 2011
priority date (Note) -
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Abstract
A piezoelectric vibrating piece includes an excitation unit in a rectangular shape, a framing portion, a connecting portion, and a protrusion. The excitation unit includes a pair of excitation electrodes on the pair of principal surfaces, a first side that extends in a first direction, and a second side that extends in a second direction. The second side is longer than the first side. The second direction is perpendicular to the first direction. The connecting portion connects the first side of the excitation unit to the framing portion. The connecting portion is thinner than the framing portion. The protrusion protrudes in the thickness direction in at least one of the connecting portion and a region between the connecting portion and the excitation electrode. The length of the protrusion in the first direction is equal to or longer than a length of the connecting portion in the first direction.
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