Patent ID: 6655790
Filing Date: 2003-12-02
Classification: B41J,H01L

Abstract:
A piezoelectric actuator, comprising:a piezoelectric plate that is made of at least one sheet of piezoelectric material; a set of a plurality of first internal electrodes that are provided in one direction in the piezoelectric plate with a space therebetween; a set of a plurality of second internal electrodes that are provided in the one direction in the piezoelectric plate so as to correspond to the set of the first internal electrodes with a space between the set of the first internal electrodes and the set of the second internal electrodes; and a groove that is formed in the one direction in the piezoelectric plate so as to expose ends of at least one of the set of the first internal electrodes and the set of the second internal electrodes, wherein the piezoelectric material between the first internal electrodes and the second internal electrodes is polarized.