Multilayer ultrasonic transducer and ultrasonic inspection device
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United States of America
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May 3, 2022
Grant Date -
Sep 26, 2019
app pub date -
Sep 14, 2018
filing date -
Sep 14, 2018
priority date (Note) -
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Abstract
A multilayer ultrasonic transducer of an embodiment includes: a plurality of stacked oscillators; external electrodes disposed on outer exposed surfaces of two oscillators disposed in the outermost layers out of the plurality of oscillators; and a plurality of internal electrodes each disposed between two of the plurality of oscillators. There are provided electrode regions in which the plurality of internal electrodes are arranged such that the number of layers of the internal electrodes in a direction in which the oscillators are stacked gradiently increases from an inner region toward an outer peripheral region of the plurality of oscillators, and ultrasonic waves emitted from the plurality of oscillators are focused toward at least the inner region.
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