PIEZOELECTRIC ELEMENT AND PIEZOELECTRIC VIBRATOR HAVING THE SAME
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United States of America Patent
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Sep 10, 2015
app pub date -
Sep 22, 2014
filing date -
Mar 10, 2014
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Abstract
A piezoelectric element and a piezoelectric vibrator having the same are disclosed. A piezoelectric element according to the present invention includes: a plurality of ceramic piezoelectric layers configured to contract and expand according to supply of electric power; an electrode pattern constituted with electrodes laminated alternately with the plurality of ceramic piezoelectric layers; and a flexible layer formed on a surface of an upper-most electrode of the electrode pattern so as to protect the upper-most electrode and configured to prevent a crack from occurring by contracting and expanding according to contraction and expansion of the ceramic piezoelectric layers.
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