Patent ID: 6653761
Filing Date: 2003-11-25
Classification: G11B,H01L,Y10T

Abstract:
A micro-actuator comprising:an actuator base; a base electrode adhered to said actuator base by a first adhesive; first and second shearing-type piezoelectric elements having polarization directions opposite to each other and perpendicular to the element thickness direction, adhered to said base electrode by a second adhesive; a movable plate adhered to said first and second piezoelectric elements by a third adhesive; a first wire for connecting said first and second piezoelectric elements; and a second wire for connecting either one of said first and second piezoelectric elements to said base electrode, wherein said base electrode includes a first conductor pattern electrically connected to said first and second piezoelectric elements through said second adhesive, and a second conductor pattern electrically independent from said first conductor pattern and connected to said second wire, said second adhesive is thin enough to allow electrical conduction between said base electrode and said first and second piezoelectric elements, and said first and third adhesives are thick enough to provide electrical insulation respectively between said actuator base and said base electrode and between said movable plate and said first and second piezoelectric elements.