Patent ID: 6967800

Claim:
A suspension assembly for use with an actuator arm of a disk drive, the suspension assembly comprising: a load beam; and a generally rectangular base plate, the base plate defining a longitudinal axis, the base plate including: an actuator arm end including a swage opening disposed along the longitudinal axis for swage attachment to the actuator arm; a head gimbal end disposed opposite the actuator arm end, the head gimbal end in mechanical communication with the load beam for distally supporting the load beam, the head gimbal end defining opposing first and second distal corners extending beyond the actuator arm when the actuator arm end is attached to the actuator arm; and first and second mass reduction openings extending beyond the actuator arm when the actuator arm end is attached to the actuator arm formed through the base plate symmetrically about the longitudinal axis at the head gimbal end for locally reducing mass to mitigate torsional vibration mode frequency about the longitudinal axis, the first and second mass reduction openings being free of any mass therein, the first mass reduction opening disposed at the head gimbal end between the first distal corner and the longitudinal axis, the second mass reduction opening disposed at the head gimbal end between the second distal corner and the longitudinal axis.