Hitachi Global Storage Technologies Netherlands B.v.

International Business Machines Corporation

Akira Morita

Shingo Tsuda

Hiroki Kitahori

Shinichi Kimura

Mutsuro Ohta

Yoshitaka Kakizaki

Takaaki Deguchi

Satoshi Matsumura

Masayuki Kanamaru

Yasuhiro Kotani

Kanako Abe

Hiroyuki Akiyama

Embodiments of the invention provide an efficient layout of circuit elements on a circuit board. A hard disk drive (HDD) according to one embodiment of the present invention is provided with a circuit board. The circuit board has an IC of HDC, MPU, and R/W channel, an IC of MDU, an SPM aperture, and a carriage bearing aperture. The IC is provided on the circuit board on the side where the center of a carriage bearing protrusion is positioned with respect to a central line AB parallel to the short sides of the surface of the housing and on the side opposite to the side where the center of the carriage bearing protrusion is positioned with respect to a central line CD parallel to the long sides of the surface of the housing. The IC of MDU is provided on the circuit board on the side where the center of the carriage bearing protrusion is positioned with respect to the central line CD and at a position between the center of an SPM protrusion and the center of the carriage bearing protrusion in the longitudinal direction of the surface of the housing.

Magnetic disk drive having circuit board apertures fitted with protrusions to achieve efficient layout of circuit elements

Embodiments of the present invention provide a structure of a pivot receiving surface which may excellently adjust the attitude of a head supporting mechanism in a magnetic disk drive. In one embodiment, three projections are formed at a base for supporting a pivot assembly. The first projection is formed on a first line which bisects an angle defined between a second line and a third line determining a range, in which a head/slider flies above a magnetic disk. In contrast, the other two projections are formed at positions apart from the first projection at an angle of 120&#xb0;, respectively. The attitude of the pivot assembly is adjusted by adjusting the heights of the projections, and thus, a head supporting mechanism is corrected in a predetermined attitude within the range in which the head/slider flies above the magnetic disk.

Boss location to adjust head attitude

Embodiments of the present invention provide a data storage device and a magnetic disk drive capable of maintaining the inside of a base in a hermetically sealed condition. In one embodiment, a data storage device includes a recording disk, a base having a through hole, a top cover having a tapping hole aligned with the through hole and a depressed portion with the tapping hole formed in a bottom thereof, and a screw inserted through the through hole into threaded engagement with the tapping hole and having a head which comes into close contact with an outer surface of the base. The top cover is fitted inside the base in a state in which the depressed portion is positioned on the base side, and the bottom of the depressed portion comes into close contact with the base in the threadedly engaged state of the screw and in an area which surrounds the through hole.

Data storage device and magnetic disk drive in hermetically sealed condition

Embodiments of the invention provide a rotating disk storage device which has a simple mounting structure facilitating mounting thereof to a host system and is reduced in noise. In one embodiment, the rotating disk storage device includes a magnetic disk, a voice coil motor for driving a head suspension assembly having a head for reading data from the magnetic disk, a base for rotatably supporting the magnetic disk and housing the head suspension assembly and the voice coil motor, a frame having fixing areas at which the base is fixed, the fixing areas being joined to the base via an adhesive double coated tape.

Rotating disk storage device with mounting structure and enhanced fixing mechanism

Embodiments of the invention provide an FPC connecting structure superior in positioning in a magnetic disk drive. According to one embodiment, in an FPC-connector connecting structure in a magnetic disk drive, edge portions rise from the bottom of a base and there are formed inner surfaces of the edge portions. An FPC connected to a spindle motor and drawn out from an FPC draw-out port has an FPC terminal portion formed at an extreme end thereof. The FPC terminal portion comes into contact with the inner surfaces and is positioned thereby. A guide pin is also used for the positioning. Positioning of the FPC terminal portion may be done easily and positively by utilizing a corner of the base.

FPC-connector connecting structure and magnetic disk

The present invention provides a magnetic disk device which firmly fixes the yokes of a rotary actuator between a base and a cover. The yoke can be made compact and the movable range of the rotary actuator can be wide. An attaching screw attaches a first yoke to a base and fixing screws passing through the second yoke and the first yoke from a cover are screwed to the base.

Magnetic disk device with firmly fixed yokes

The present invention provides a method and apparatus for moving a head arm assembly to a landing zone in a disk drive storage device. In disk drive according to the present invention, a control means responds to termination of a read/write operation by applying a drive current for moving an actuator arm toward an actuator lock, and then continuously applies the drive current to the actuating means to maintain an engagement of the actuator arm with the actuator lock stopped at a predetermined position, after the termination of read/write operation, and then stops a rotation of said rotating data recording disk.

Method and apparatus for moving a head arm assembly to a landing zone in a disk drive storage device

The present invention is an after-assembly shroud in a magnetic disk drive. The shroud of the present invention is attached to a housing after assembly of the disk drive and actuator near the circumferential edge of the disk. The disk is attached to the housing of a magnetic disk drive so that it is rotatable with respect to the housing. The invention relates to a fabrication method for the magnetic disk drive. The assembly method is adapted for attaching the shroud to the housing of the disk drive after assembly and is performed according to novel assembly sequence. The shroud of the present invention reduces disk flutter due to turbulent air flow, and track positioning precision can be enhanced.

Growing community of inventors

Kanagawa, Japan

Akira Morita