Patent ID: 6530652
Filing Date: 2003-03-11
Classification: B41J,H01L

Abstract:
A micro actuator comprising:a substrate having a space part which is integrally defined in the substrate and is opened only at a lower end thereof; a first piezoelectric element formed on the substrate in a first area which is arranged above the space part and actuated when voltage is applied thereto; a second piezoelectric element formed on the substrate in a second area which is not arranged above the space part and not actuated; and an upper electrode formed on the first piezoelectric element; whereby rigidity of an entire structure is elevated and panel vibration is reduced, by the second piezoelectric element; wherein, when assuming that W is a width of the space part which is defined in the substrate, T is a thickness of the first and second piezoelectric elements, D is a width of the first piezoelectric element and d is a line width of a removed piezoelectric element, a relationship between the width D of the first piezoelectric element and the line width d of the removed piezoelectric element is given as described below: &frac15;T<5T &frac13;W.