Hitachi Global Storage Technologies Netherlands B.v.

Hgst Netherlands, B.v.

Jeffrey Kerner

Robert Carl Reinhart

Manoj Keshavan

Fu-Ying Huang

Jr-Yi Shen

Kirk Barrows Price

Ta-Chang Fu

Edgar Dennis Rothenberg

Hatem R Radwan

Miguel Dominguez

An actuator assembly for a magnetic storage device includes a top surface and a bottom surface that opposes the top surface. The actuator assembly also includes a first constraining layer that is secured to the top surface by a first adhesive layer. The first adhesive layer is positioned between the top surface and the first constraining layer. Additionally, the actuator assembly includes a second constraining layer that is secured to the bottom surface by a second adhesive layer. The second adhesive layer is positioned between the bottom surface and the second constraining layer. At least one of (i) the first constraining layer is configured differently than the second constraining layer; and (ii) the first adhesive layer is configured differently than the second adhesive layer.

Dampers for actuator assembly of hard disk drive

A flex cable assembly for a head stack assembly of a hard disk drive comprises a flex cable for conducting data signals from the head stack assembly to a connector. The flex cable comprises a dynamic loop section between a termination for the head stack assembly and the connector. A constrained layer damper is attached adjacently to an area of the flex cable that is configured to receive the coupler. The constrained layer damper extends into the dynamic loop section of the flex cable.

Flex cable assembly damper

A plurality of non-magnetic dampers on a voice coil yoke arm for reducing low frequency vibration in a hard disk drive is disclosed. One embodiment provides housing and at least one disk coupled with the housing. In addition, an actuator is coupled to the housing, the actuator having a coil region with a voice coil and a plurality of voice coil yoke arms. At least one of a plurality of non-magnetic dampers is also coupled with each of the plurality of voice coil yoke arms and not with the voice coil. In so doing, the plurality of non-magnetic dampers are able to damp low frequency actuator coil torsion and coil bending resonances.

Plurality of non-magnetic dampers on a voice coil yoke arm

Outer arm constrained layer dampers to improve actuator dynamics are disclosed. One embodiment provides a housing and disk pack mounted to the housing and having a plurality of disks that are rotatable relative to the housing. In addition, an actuator is coupled to the housing, the actuator having a plurality of suspensions arms for reaching over the plurality of disks. A first damper is coupled with an outside (or inside) portion of a top outside suspension arm of the plurality of suspensions arms. In addition, a second damper is coupled with an outside (or inside) portion of a bottom suspension arm of the plurality of suspensions arms. In so doing, vibration modes involving deformation of the top suspension arm and the bottom suspension arm are damped.

Outer actuator arm constrained layer dampers

Embodiments of the present invention include a disk drive actuator arm for reducing amplitude of vibration modes substantially planar to a disk surface. The actuator arm comprises a plurality of head arms coupled to the actuator arm, the head arms substantially equally spaced and substantially parallel to each other. The actuator arm further includes a damping material bonded to a surface of one of the plurality of head arms, wherein the surface is substantially parallel to the plurality of head arms. The actuator arm further includes a mass bonded to the damping material wherein the mass dampens the amplitude of vibration modes substantially planar to the disk surface.

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San Jose, CA, United States of America

Jeffrey Kerner