Samsung Electronics Co., Ltd.

Momo K Boljanovic

Young-Hoon Kim

Frank Ivan Morris

Seong-Woo Kang

Dong-Ho Oh

Haeng-Soo Lee

The invention includes sliders provided with indented surfaces, reducing the roll center for head gimbal assemblies below the effective thickness of the slider. Head gimbal assemblies built with these sliders may reduce off-track displacements induced by disk vibration. The load beam gimbal may contact the indented surface, creating a slider roll center less than the slider thickness. Alternatively, the sliders may include a slider contact cover interfacing to the load beam forming the gimbal. The slider contact covers may couple with the slider through an indented surface located closer than the slider thickness. These may have a negative slider roll center. The invention includes actuator arms, actuator assemblies, and hard disk drives including these head gimbal assemblies. The invention includes making the invention's sliders, head gimbal assemblies, actuator arms, actuator assemblies, and hard disk drives. The invention includes the products of these processes.

Method and apparatus reducing off track head motion due to disk vibration in a hard disk drive

An actuator arm assembly of a hard disk drive. The assembly includes a flexure that is attached to an actuator arm and a head coupled to the flexure. The head is coupled to a pre-amplifier circuit of the drive. The head is also electrically grounded through the flexure and the actuator arm. To improve the reliability of the ground path the flexure has a spring that is contact with a slot of the actuator arm. The spring provides a ground path from the head to the actuator arm.

Grounding connection between suspension flexure and arm actuator

The invention includes a method of attenuating resonance frequency modes in head suspensions, which does not significantly increase the weight of the head suspension. The invention provides a way to control the head deflection from the disk surface, which helps minimize damage from head slapping. The invention includes a basic head suspension infrastructure for which vibration resonance can be predictably controlled.

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Milpitas, CA, United States of America

Momo K Boljanovic