ACTUATOR ARM INTEGRATED PIEZOELECTRIC MICROACTUATOR

摘要

A system for positioning a transducing head in a disc drive device (10) over a selected track of a rotatable disc (30) includes an actuator arm (16) which is rotatable about an axis (14), a head suspension mechanism (18) connected to the actuator arm (16), and a slider (24) carrying a transducing head and supported by the head suspension mechanism (18). A low resolution motor (12) moves the actuator arm (16) about the axis (14) to effect coarse movement of the head between tracks of the disc (30). A piezoelectric element (26) is embedded in the actuator arm (16) to distort the arm to effect fine positioning of the head. Control circuitry (50, 52, 54, 58) distributes electrical signals to the low resolution motor (12, 60) and the piezoelectric element (26, 56) to selectively control movement thereof. The piezoelectric element (26) is embedded in the actuator arm (16) by removing a predetermined amount of material from the actuator arm (16) and bonding the piezoelectric element (26) in the resulting space in the actuator arm (16).