METHOD OF DESIGNING PIEZOELECTRIC ELEMENT UNIT, ULTRASONIC ELEMENT INCLUDING PIEZOELECTRIC ELEMENT UNIT MANUFACTURED USING THE SAME, METHOD OF MANUFACTURING ULTRASONIC ELEMENT, AND ACOUSTIC PRESSURE FOCUSING APPARATUS INCLUDING ULTRASONIC ELEMENT

摘要

An embodiment of the present invention includes a method of designing a piezoelectric element unit that increases focusing strength of sound pressure and enables precise sound focusing, an ultrasonic element including a piezoelectric element unit manufactured using the same, a method of manufacturing the ultrasonic element, and an ultrasonic element It provides a sound pressure focusing device. Here, the design method of the piezoelectric element unit selects the target position to which the maximum acoustic pressure is to be focused and the target distance to the target location, inputs basic information of the piezoelectric element base material, and multiples the height direction cross section of the piezoelectric element base material. By dividing into a grid of, grouping a plurality of grids into a unit grid group, and calculating the magnitude of the output sound pressure to be output from each unit grid group, so that the maximum sound pressure is focused on the target position, among the unit grid groups, the standard The unit grid group for outputting the output sound pressure belonging to the range of sound pressure is determined, and a plurality of concentric ring patterns are determined based on the pattern shape information including the position and width corresponding to each of the determined unit grid groups.