MASS BALANCED FLEXURE GIMBAL FOR HEAD GIMBAL ASSEMBLY SWAY MODE CONTROL

摘要

Approaches to a mass balanced flexure gimbal assembly for controlling the sway mode of the loadbeam portion of the suspension of a head gimbal assembly (HGA) of a hard-disk drive (HDD). The sway mode of concern is that which is excited when a head slider is actuated by a plurality of piezo actuation devices of a secondary actuation system. A suspension includes a mass attached to the suspension flexure and configured for balancing a moment force about the gimbal, about which a slider rotates when microactuated. The mass is located on the side of the slider opposing the side on which the piezo actuation devices are mounted, to counteract the mass of the piezo devices.

主权项

1. A suspension for a hard disk drive, comprising:
a load beam comprising a dimple; a flexure coupled to said load beam through said dimple and comprising a slider attachment platform; a slider coupled to said slider attachment platform; a microactuator located on a proximal side of said slider, said microactuator comprising one or more piezo actuating device configured for providing a moment force for rotating said slider about said gimbal in response to a microactuator driver; and a mass coupled with said flexure on a distal side of said slider opposing said proximal side, said mass specifically configured and positioned for balancing said moment force about said gimbal.