Patent ID: 6342752
Filing Date: 2002-01-29
Classification: H01L

Abstract:
A piezoelectric transformer element with a multi layer structure having an input region which is polarized in a direction of thickness and has input electrodes, and an output region which is polarized in a longitudinal direction and has an output electrode, comprising:a plurality of internal electrodes as the input electrode which are formed between a plurality of piezoelectric layers; first and second external electrodes formed on an end face of said piezoelectric transformer element in the longitudinal direction on the input region side; and an external electrode formed on an end face of said piezoelectric transformer element in the longitudinal direction on the output region side, wherein said plurality of internal electrodes are alternately connected to said first and second external electrodes every other layer, and said first and second external electrodes are electrodes for applying input voltage, said element further comprises third and fourth external electrodes formed on side surfaces parallel to the longitudinal direction of said piezoelectric transformer element on the input region side, and said plurality of internal electrodes are also alternately connected to said third and fourth external electrodes every other layer.