Disc drive spindle motor damper

摘要

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.