Disc drive spindle motor having a damper on a bottom surface...

Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Disk record

Reexamination Certificate

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Details

C360S097020

Reexamination Certificate

active

06898051

ABSTRACT:
A disc drive assembly includes a magnetic disc mounted on a hub of a spindle motor. The spindle motor includes a base portion supporting the hub for rotation about a spindle axis. A bottom surface of the base portion extends outside of an internal disc drive environment, and a damper affixed to the bottom surface of the base portion attenuates vibrations within the base portion of the spindle motor. A constrain layer of the damper is secured to the bottom surface of the base portion by an adhesive, and the constrain layer is sufficiently stiff to dampen resonant vibrations such as rocking mode vibrations.

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