PIEZOELECTRIC ELEMENT, PROBE, ULTRASONIC MEASUREMENT DEVICE, ELECTRONIC APPARATUS, POLARIZATION PROCESSING METHOD, AND INITIALIZATION DEVICE
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United States of America Patent
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Feb 9, 2017
app pub date -
Aug 3, 2016
filing date -
Aug 4, 2015
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Abstract
A piezoelectric element is provided with three electrodes, namely a first electrode, a second electrode, and a third electrode, arranged linearly on one side surface of a piezoelectric body at regular intervals. A polarization processing electric field is applied between the first electrode and the second electrode, and then the polarization processing electric field is applied between the second electrode and the third electrode. The polarization processing electrode field on this occasion is a half as strong as in the case of performing the polarization process of applying the electric field at a time between the first electrode and the third electrode.
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