Patent ID: 6879468
Filing Date: 2005-04-12
Classification: G11B

Abstract:
1. A magnetic head actuator for a magnetic recording disk drive, comprising a micro-actuator which is provided at a tip end portion of a load beam attached to an arm of a voice coil motor and which is for oscillating a magnetic head slider, wherein one end of said micro-actuator is fixed to a stator portion fixed to said load beam, a gimbal portion and a rotor portion oscillatably supported by metallic micro-beams formed are provided on the side of the other end of said micro-actuator, said metallic micro-beams each have a structure in which long pieces connected respectively integrally to both end edges of a tip end portion of a micro-actuator main body are bent substantially perpendicularly to the side of the load beam along both side edges, the long pieces are folded back by substantially 180° to the inside at the tip end position of the micro-actuator main body, and the gimbal portion and the rotor portion are connected integrally to the tip ends of the long pieces through joint portions, respectively, the magnetic head slider is attached to said gimbal portion, either one of a permanent magnet and a coil is disposed at the stator portion, the other of said permanent magnet and said coil is disposed at said rotor portion, and said rotor portion and said magnetic head slider attached to said gimbal portion as one body with said rotor portion are oscillated by passing an electric current through said coil.