Western Digital Technologies, Inc.

David Ali

Keith R Berding

Valentin Ojeda

Norman K Watkins

Frederick J Hanke

Wayne M Yamada

Claire-Nechol W E Sevier

A disk drive includes a disk drive base, a disk rotatably coupled to the disk drive base having a disk surface, a head stack assembly rotatably coupled to the disk drive base adjacent the disk surface, and a cover attached to the disk drive base enclosing the disk and head stack assembly there between. The cover includes a metal layer and a polymer layer substantially coextensive with the metal layer and extending substantially across the disk drive base. The polymer layer includes a polymer layer feature extending away from the metal layer towards the disk drive base. The polymer layer feature defines a cavity between the polymer layer and the metal layer.

Disk drive with cover including a metal layer and a polymer layer with a polymer layer feature

A disk drive that includes a head disk assembly (HDA) comprising a base having a top base surface and a bottom base surface, and a top cover secured to the top base surface; a printed circuit board assembly (PCBA) in communication with the HDA and comprising a first PCBA surface and a second PCBA surface wherein the first PCBA surface faces the bottom base surface; and a bottom cover fastened to and substantially covering the bottom base surface. The invention further includes an acoustic damping shield assembly placed between the bottom cover and the second PCBA surface, wherein the acoustic damping shield assembly comprises first and second acoustic absorption layers having major surfaces; an acoustic barrier layer placed in between the major surfaces; and the major surfaces and the acoustic barrier layer are fixed in a stacked relationship.

Disk drive having an acoustic damping shield assembly with an acoustic barrier layer

A disk drive that includes a head disk assembly (HDA) having a disk drive base, and a printed circuit board assembly (PCBA) in communication with the HDA. The invention further includes an acoustic damping assembly placed between the disk drive base and the PCBA. The acoustic damping assembly includes first and second acoustic absorption layers having major surfaces, an acoustic barrier layer placed in between the major surfaces, and the major surfaces and the acoustic barrier layer are fixed in a stacked relationship.

Disk drive having an acoustic damping assembly with an acoustic barrier layer

A disk drive including a head disk assembly in communication with a printed circuit board assembly, and further includes a disk drive base and a disk drive cover assembly collectively housing a head stack assembly and a data storage disk mounted on a spindle motor assembly for rotating the storage disk. The disk drive cover assembly further includes first and second substantially-planar rigid members having major surfaces, a compressible member of a foam composition placed in between the major surfaces wherein the compressible member is characterized by an unconstrained thickness d, and wherein the major surfaces and the compressible member are fixed in a stacked relationship to compress the compressible member to a thickness less than d. The head disk assembly further includes structure for fixing the disk drive cover assembly to the head stack assembly and the spindle motor assembly.

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San Jose, CA, United States of America

David Ali