Patent ID: 6719412
Filing Date: 2004-04-13
Classification: B41J,H01L

Abstract:
A piezoelectric actuator, comprising:first piezoelectric sheets each having inner individual electrodes; and second piezoelectric sheets each having an inner common electrode, the first and second piezoelectric sheets being laminated alternately, wherein through-holes are formed in the first and second piezoelectric sheets and coated with a conductive material such that the inner individual electrodes are electrically connected, at their end portions, with one another in a laminating direction of the first and second piezoelectric sheets and that the common electrodes are electrically connected, at their at least one end portion, with one another in the laminating direction, a maximum diameter of each of the through-holes being not less than about 20 &mgr;m and not more than about 200 &mgr;m.