초록 ▼

A disk drive is disclosed including a substantially monolithic stator. The stator is formed by a metal injected molding (MIM) process in which high silicon iron is sintered to produce a stator made from loss magnetic material. The low loss magnetic material is a low hysteresis loss, high resistivity

A disk drive is disclosed including a substantially monolithic stator. The stator is formed by a metal injected molding (MIM) process in which high silicon iron is sintered to produce a stator made from loss magnetic material. The low loss magnetic material is a low hysteresis loss, high resistivity material. A substantially monolithic stator without multiple laminations is thus achieved. Avoiding stator laminations in this manner permits the fabrication of a disk drive having a significantly reduced vertical profile while still suppressing undesired eddy current and hysteresis losses in the stator. The stator is advantageously directly machined with a central bore to receive a bearing assembly for the spindle of the hub of the drive motor. The disclosed stator geometry is optimized in three dimensions to minimize stator volume and maximize the stator winding volume.

대표청구항 ▼

[ What is claimed is:] [1.] A disk drive comprising:a rotor including a hub having a central spindle therein;a disk fixedly mounted to the hub;a substantially monolithic stator of low loss magnetic material, the stator being situated substantially within the hub to drive the rotor, the stator includ

[ What is claimed is:] [1.] A disk drive comprising:a rotor including a hub having a central spindle therein;a disk fixedly mounted to the hub;a substantially monolithic stator of low loss magnetic material, the stator being situated substantially within the hub to drive the rotor, the stator including a central bore therein;a bearing assembly directly mounted to the stator in the central bore, the central spindle of the hub being rotatably mounted in the bearing assembly;an elongated arm;a magnetic read/write head situated on the elongated arm; andan actuator for moving the arm and read/write head to flying positions above the disk.