Piezoelectric transformer

摘要

Disclosed is a piezoelectric transformer capable of easily achieving external electrical connection and polarization of electrodes while obtaining stable output characteristics. The piezoelectric transformer includes a piezoelectric member having two opposite rectangular major surfaces as first and second surfaces, and four side surfaces connecting the first and second surfaces. The piezoelectric member is longitudinally divided into two portions to have a first portion and a second portion, thereby longitudinally dividing each of the first and second surfaces into a first surface portion and a second surface portion. The piezoelectric transformer also includes an input electrode formed on the first surface portion of the first surface of the piezoelectric member, a ground electrode formed on the first surface portion of the second surface of the piezoelectric member while being vertically symmetrical with the input electrode, and an output electrode formed on the second portion of the piezoelectric member at an end of the second portion spaced away from the input electrode.