DSA suspension having a flexure gimbal assembly with moment-balanced sections

摘要

In a gimbal dual stage actuated suspension, the gimbal including the head slider is moment-balanced about the load beam dimple thus reducing sway mode gain. In a ring gimbal suspension the T-limiter can be removed and replaced with an extended gimbal tongue including the same layers of insulating material and copper that are part of flexure's flexible circuit, thus allowing the moment-balancer to be formed integrally with the rest of the flexure as part of the standard flexure manufacturing process. Additionally, the traces of the flexible circuit can be made to run at least partially underneath the head slider and approach the slider bond pads from the proximal side of the suspension, thereby shifting weight toward the proximal side.

主权项

1. A dual-stage actuated suspension for a disk drive, the suspension comprising:
a load beam having a dimple; a head slider for writing data to, and reading data from, a rotating data storage medium; at least one microactuator arranged to affect rotational movement of the head slider about the load beam dimple; a flexure affixed to the load beam, the flexure having a gimbaled portion to which the head slider is affixed, the gimbaled portion comprising a first flexure section that is distal of the dimple and a second flexure section that is proximal of the dimple; and an electrical circuit having electrical traces for carrying electrical signals to and from the head slider and having slider bond pads to which the electrical traces and the head slider are electrically connected; wherein at places where the electrical traces leave the bond pads, those electrical traces extend away from the bond pads in a proximal direction; and wherein a first rotational moment about the dimple associated with the first flexure section and a second rotational moment about the dimple associated with the second flexure section are substantially balanced with respect to one another.