LAMINATED ELECTROMECHANICAL ENERGY CONVERSION ELEMENT AND MANUFACTURING METHOD THEREFOR

摘要

PROBLEM TO BE SOLVED: To provide a laminated piezoelectric element using a through-hole capable of miniaturizing an oscillatory wave motor. SOLUTION: The laminated piezoelectric element is provided, where a plurality of electrode regions 4 and 5 of a plurality of piezoelectric layers 2 and 3 are connected using a through-hole 6; the through-hole 6 is formed into a semicircle so as to be exposed to the outside diameter part, so that the area of an insulation part around the through-hole 6 is reduced to be as small as possible, resulting in an enlarged area of effective piezoelectric active part of the laminated piezoelectric element.