METHOD FOR DESIGNING PIEZOELECTRIC ELEMENT UNIT, ULTRASOUND ELEMENT COMPRISING PIEZOELECTRIC ELEMENT UNIT PRODUCED USING SAME, METHOD FOR PRODUCING ULTRASOUND ELEMENT, AND ACOUSTIC PRESSURE FOCUSING DEVICE COMPRISING ULTRASOUND ELEMENT

摘要

One embodiment of the present invention provides a method for designing a piezoelectric element unit which increases the focusing intensity of acoustic pressure and is capable of accurate acoustic focusing, an ultrasound element comprising a piezoelectric element unit produced using same, a method for producing an ultrasound element, and an acoustic focusing device comprising an ultrasound element. Here, the method for designing a piezoelectric element unit comprises: selecting a target position at which maximum acoustic pressure will be focused and a target distance to the target position; inputting basic information of a piezoelectric element base material; dividing the cross section in the height direction of the piezoelectric element base material with a plurality of grids so as to group the plurality of grids into unit grid groups; calculating the magnitude of output acoustic pressure which should be output from each unit grid group in order for the maximum acoustic pressure to be focused at the target position; discerning, from among the unit grid groups, unit grid groups which output the output acoustic pressure falling under a reference acoustic pressure range; and determining a plurality of concentric ring patterns on the basis of pattern shape information including a position and a width corresponding to each of the discerned unit grid groups.