Patent ID: 6256175
Filing Date: 2001-07-03
Classification: G11B

Abstract:
A disc drive having a recording disc rotatable about an axis, a slider carrying a transducing head for transducing data with the disc, and a dual-stage actuation assembly supporting the slider to position the transducing head adjacent a selected radial track of the disc, the dual-stage actuation assembly including a coarsely movable support structure and an electromagnetic microactuator, the microactuator comprising:a microactuator substrate;a stator on the microactuator substrate, the stator being attached to the support structure;a rotor on the microactuator substrate, the rotor being operatively attached to the slider and being movable ill a plane generally parallel to a surface of the rotatable disc with respect to the stator to finely position the slider adjacent to the selected track of the disc; andmeans for magnetically shielding the transducing head in a plane generally parallel to the surface of the rotatable disc from fields generated by the stator and the rotor the means for magnetically shielding located on the microactuator substrate.