Western Digital Technologies, Inc.

Thomas J Hitchner

Keith R Berding

Lynn Bich-Quy Le

Jung-Seo Park

Siddhesh Vivek Sakhalkar

David K Myers

Chunjer Chuck Cheng

Scott Edward Watson

Robert J McNab

Charles D Flanigan

Yau-Shing Lee

Robert Bradley Burkhart

David W Chew

Arman V Golgolab

Brian P Schott

Sudha Narayan

James Demuth

A multi-actuator hard disk drive includes a lower actuator with a corresponding voice coil motor assembly (VCMA), a coaxial upper actuator with a corresponding VCMA, and a central support plate positioned between the upper and lower VCMAs and to which the upper VCMA is fastened. Use of a central support plate enables some control over the direct and coupled plant transfer functions, while effectively providing a base support structure for the upper VCMA and enabling use of conventionally-sized fasteners.

Center structure having attachment support for an actuator in a multi-actuator hard disk drive

A multi-actuator hard disk drive includes a lower actuator with a corresponding voice coil motor assembly (VCMA) including a magnet coupled with a first magnet housing plate, a coaxial upper actuator with a corresponding VCMA including a magnet coupled with a second magnet housing plate, and a central support plate mechanically fastened to an enclosure base, at one or more locations, and positioned between the first magnet housing plate of the first VCMA and the second magnet housing plate of the second VCMA. Thereby, the pivot and VCM tilt and the coil torsion modes of the direct plant transfer function are minimized and the peak-to-peak gain in the coil torsion mode of the coupled plant transfer function is reduced.

Anchoring structure for improved structural dynamics of actuators in a multi-actuator hard disk drive

A hand held data storage apparatus includes a disk-based storage device, an interface configured for data transfer with the storage device, and an enclosure that encapsulates the storage device and the interface, wherein the enclosure is configured with a rectangular mobile phone form factor.

Hand held storage device

A sealing gasket sheet and a storage drive are provided. The sealing gasket sheet includes a first adhesive layer, a metal layer disposed adjacent to the first adhesive layer, and a second adhesive layer disposed adjacent to the metal layer. The storage drive includes an enclosure formed by a storage drive base and a cover with the sealing gasket sheet between the storage drive base and the cover.

Hard disk drive enclosure base with a helium sealed gasket

A storage base having an interior side and an exterior side is described. The storage drive base includes a slotted aperature, a flexible circuit and a sealing-adhesive barrier. The slotted aperature passes through the storage drive base from the interior side to the exterior side. The flexible circuit has a first end and a second end. The first end of the flexible circuit is installed in the slotted aperture and aligned so that the first end extends along an interior surface of the storage drive base in a location proximal to the slotted aperture. The sealing-adhesive barrier is applied between edges of the slotted aperture and the flexible circuit to form a hermetic seal between the exterior side and the interior side of the storage drive base.

Hard disk drive enclosure base with feed through flexure design and accompanying flexure

A disk drive comprises a drive enclosure defining a generally rectangular form factor; an electromechanical assembly contained within the drive enclosure, and a printed circuit board assembly (PCBA) at least partially contained within the drive enclosure. The drive enclosure possesses at least one of the following characteristics: the drive enclosure defines chamfers on at least one of four corners of the generally rectangular form factor; and the drive enclosure defines a first surface and a second surface that defines an interior second surface portion and a peripheral second surface portion and wherein the interior second surface portion is further away from the first surface than is the peripheral second surface portion.

Slim form factor disk drive comprising disk drive enclosure having an insular raised region

A disk drive includes an inner frame that has a disk drive base and a disk drive cover. A disk, mounted on a rotary spindle attached to the disk drive base, defines a disk outer periphery that protrudes into a first side opening of the inner frame. A head actuator is attached to the disk drive base and to the disk drive cover. An outer enclosure includes an extruded hollow cylinder with a cross-sectional shape that is a continuous and unbroken ring that is substantially rectangular, and that surrounds a cavity. The outer enclosure surrounds the disk drive base and the disk drive cover. During assembly, the inner frame may be slid lengthwise into an open end of the outer enclosure, and the outer enclosure may be hermetically sealed to enclose air or helium in the cavity.

Disk drive having an inner frame with a side opening and an extruded hermetically sealed outer enclosure

A novel disk drive enclosure includes a disk drive base having a bottom portion and four side walls that define a cavity therebetween. At least one disk is mounted in the cavity. The disk drive also includes a top seal that includes a peripheral portion that overlies each of the four side walls and a central portion that spans the cavity. A metal flange protrudes from all four side walls of the disk drive base, and is folded over the peripheral portion of the top seal along all four side walls. The top seal is continuously adhered to the metal flange along an entire length of all four side walls. The disk drive enclosure encloses helium gas.

Disk drive having a base with a protruding peripheral metal flange that is folded over a top cover to enclose helium

A novel disk drive includes a top cover having a plurality of integral anchor tabs extending towards a disk drive base. Each of the plurality of anchor tabs includes a hooking surface that faces the top cover. The disk drive base includes a plurality of retention cavities, each of the retention cavities including a catching surface that faces away from the top cover. Each of the plurality of anchor tabs protrudes into a respective one of the plurality of retention cavities, and may be deformed so that the hooking surface of the anchor tab is in contact with the catching surface of the retention cavity.

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San Martin, CA, United States of America

Thomas J Hitchner