| 摘要 |
According to one embodiment, a disk device includes a recording medium, a spindle motor which supports and rotates the recording medium, a head, and a head actuator which supports the head for movement. The spindle motor includes a rotor, a fluid bearing which supports the rotor for rotation, a cylindrical magnet coaxially fixed to the rotor, an annular stator located outside the rotor in the circumferential direction, and a magnetic shielding member which blocks leakage flux from a magnetic circuit. The magnetic shielding member has an annular portion which extends at right angles to an axis of rotation of the rotor and covers an upper surface portion of the stator, and a cylindrical portion which extends along the axis of rotation of the rotor and radially faces the whole outer peripheral surface of the rotor except a region where the stator and the magnet face each other.
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