Hitachi Global Storage Technologies Netherlands B.v.

Cisco Technology, Inc.

International Business Machines Corporation

Arista Networks, Inc.

Steven Alf Hanssen

Jr-Yi Shen

Robert Gregory Twiss

Vic Hong Chia

Hong Huynh

Stanley Yen Wong

Kirk Barrows Price

Andre Sirilutporn Chan

Ta-Chang Fu

Norman Tang

Liang Ping Peng

Kunihiro Shida

Andrew Keith Hanlon

Tisha Jefferson

Eric Alan Eckberg

James B Sullivan

Robert Morris Wilcox

David Lai

Anthony Nguyen

Neal Bertram Schirle

Robert Carl Reinhart

James William Berberich

Masakazu Sasaki

Dale E Goodman

Pranav Devalla

Tiffany Doria

Masaki Kohno

David Joseph Bagaoisan

Hung H Quach

Emmanuel N Tatarakis

Abbas Hosseinian

A processing unit. The processing unit includes a printed circuit board (PCB) including a lidless integrated circuit, a heatsink, and a damper system. The heatsink is coupled to the PCB and in thermal communication with the lidless integrated circuit via a thermal interface material. The damper system is compressed between the PCB and the heatsink and surrounding the lidless integrated circuit to absorb a portion of kinetic energy imparted to the lidless integrated circuit by an impact to the processing unit.

Damper system for a lidless integrated circuit

A heat sink mounting configuration is provided that is configured to prevent the heat sink from damaging ball grid arrays (BGA) of an application specific integrated circuit (ASIC) mounted on a printed circuit board (PCB) when the line card is subjected to vibrations and shocks. The heat sink mounting configuration may include a set of screws configured to be at least partially disposed within the apertures of the heat sink to secure the heat sink to the PCB. The mounting configuration includes a resilient member and a spacer disposed around the screws proximate to the apertures. The resilient members are configured to bias the heat sink against the ASIC to maintain the heat sink in contact with the ASIC. The spacers are configured to prevent the heat sink from impacting the ASIC with forces large enough to damage the BGA when the line card is subjected to vibrations and shocks.

High impact resistant heat sink

The cooling system includes a series of cooling channels arranged to provide convective cooling, with inserts for shielding electromagnetic interference (EMI) that is propagated by the waveguide nature of the cooling channels. Due to the relatively open nature, the cooling channels can serve to propagate EMI energy. The inserts mitigate the EMI exiting via these channels by attenuating or blocking the EMI. The inserts are shaped to block particular frequencies of EMI. The inserts may include thin sheet metal contoured to a half-wave profile, arranged along each cooling channel.

Cooling structures having shielding for electromagnetic inteference

Techniques are provided for sending and receiving data communications between an enhanced Quad Small Form-Factor Pluggable (QSFP+) transceiver module and an enhanced Small Form-Factor Pluggable (SFP+) transceiver module. An adapter device is provided that has a first set of signal pins configured to interface with an SFP+ transceiver module and a second set of signal pins is provided that is configured to interface with a QSFP+ host port. A retimer unit is also provided that is configured to modify a 10G signal of a first electrical signal standard associated with the SFP+ transceiver module to a 10G signal of a second electrical standard associated with a QSFP+ transceiver module and to enhance a 10G signal of the second electrical signal standard to a 10G signal of the first electrical signal standard.

QSFP+ to SFP+ form-factor adapter with signal conditioning

A pluggable module for releasable engagement with a computing device includes a first end portion, a second end portion and a release tab structure. The release tab structure connects with the first end portion to facilitate removal of the module from the port of the computing device and has a generally U-shaped profile including two elongated arms spatially distanced from each other and extending transversely from the first end portion and terminating at a crossbar that connects between the elongated arms. Portions of the elongated arms and the crossbar extend within a plane that is separated a sufficient distance from the cable connector so as to facilitate 360&#xb0; of access around the cable connector during connection and removal of the cable connector with the cable connection port.

Universal pull tab release for modules including fiber optic and cable accessibilities

In an embodiment of the present invention, at least one mechanical fastener is used to mount a voice coil magnet assembly of a hard disk drive on a housing of the hard disk drive. A layer of a material having a low friction coefficient is disposed between the housing and the voice coil magnet assembly.

Method and system for reduction of off-track write errors in disk drives

A card-through-connector fastener for reducing connector distortion is disclosed. One embodiment provides circuit card coupled with electronics associated with an actuator. A connector assembly is also coupled with the circuit card, the connector assembly for conveying data with respect to the circuit card. In addition, a fastener connectively couples the connector assembly with a portion of the housing, the fastener passing through the circuit card and providing fixed support between the connector assembly and the hard disk drive housing to reduce distortion transfer from the circuit card to the connector.

Card-through-connector fastener for reducing connector distortion

An automated system for setting the linear distance from a mounting surface of a pivot cartridge to critical features on actuator arms is disclosed. This distance is set to eliminate the tolerance incurred via normal manufacturing of these components. The system adjusts for every component to customize each actuator and/or pivot assembly to meet the functionality requirements for disk drives.

Apparatus for a disk drive actuator pivot set height tooling with an active servo compensation

A disk clamp for securing data storage disks to the hub of a spindle motor in a hard disk drive has a circumferential rib protruding from a lower surface of the disk clamp. A complementary recess is formed in the hub of the spindle motor for closely receiving the rib on the disk clamp. The inner diameter of the rib and the outer diameter of the recess are closely toleranced to provide a very precise centering feature for mounting and aligning the disk clamp with respect to the hub and spindle motor. This design reduces the complexity of the tooling and fixtures required to complete the assembly and the overall part cost is reduced.

System and method for hard disk drive with disk clamp annular rim inner wall engaging hub annular recess outer wall

An apparatus for securing the internal rotational components of a disk drive utilizes an annular clamp retention device. The clamp retention device has a rigid, metallic, main ring body from which protrudes a plurality of compliant tabs having a generally L-shaped cross-section. The compliant tabs extend radially inward from the body to form an inner circular array of the tabs. In addition, a plurality of rigid planar flanges, which are larger than the compliant tabs, extend radially outward from the body. The compliant tabs are designed to engage the hub and cartridge of the disk drive rotational components at the upper end of the disk stack.

Clamp retention apparatus for rotational disk drive components

Hard disk drive with disk clamp inner wall engaging bearing sleeve outer wall

A disk clamp for securing disks to the hub of a spindle motor in a disk drive has symmetrically spaced apart countersunk apertures in the top surface of the disk clamp. The apertures enable the disk clamp to maintain a proper orientation before the fasteners are attached. This design overcomes issues related to rotation and displacement of the clamp while it is being fastened to the hub, and reduces the complexity of the tooling and fixtures required to complete the assembly. Less tooling complexity also allows multi-fastener driver systems to be employed so that all of the fasteners required to complete the assembly may be simultaneously attached arid driven into the disk clamp. The countersunk apertures on the disk clamp are designed to couple with tapered sleeves on the installation tool to quickly and precisely center the fasteners in the disk clamp while providing anti-rotation torque for the disk clamp.

System, method, and apparatus for preventing rotation of a disk clamp while being assembled to the hub of a spindle motor in a hard disk drive and fastener centering features

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San Jose, CA, United States of America

Steven Alf Hanssen