Hitachi Global Storage Technologies Netherlands B.v.

Hitachi, Ltd.

Hitachi Global Storage Technologies Japan, Ltd.

Hitachi Global Storage Technologies

Kazuhisa Murakami

Nobuyuki Ishii

Takashi Takenaka

Iwao Matsuyama

Tomoki Hiramatsu

Masayuki Katsumoto

Mitsuhiko Oguchi

Teruyoshi Higashiya

Masaki Otsuka

Masanobu Honda

Satomi Yamaguchi

Sadahiro Nishida

Tsuneyuki Hasegawa

A disk drive. The disk drive includes a head-slider, an actuator, a ramp and a shroud. The head-slider is configured to fly above the disk. The actuator is configured to support the head-slider and to swing about a pivot shaft to move the head-slider in a radial direction of the disk. The actuator may also be configured to rest on the ramp in a stand-by position. The shroud includes an inner peripheral side surface and an outer peripheral side surface. The shroud is configured to control an air-stream which flows in a direction from the pivot shaft toward the head-slider. The inner peripheral side surface and the outer peripheral side surface are configured to blast the head-slider with the air-stream upon spinning the disk when the head-slider is positioned away from the disk in the stand-by position.

Disk drive including a shroud configured to overlap an actuator for removing debris from a head-slider

Embodiments of the invention provide a moisture absorbing mechanism for condensing excessive moisture in an environment primarily thereon so that the condensed moisture is absorbed by an absorbent material. In one embodiment, the moisture absorbing mechanism includes a dew condensation trapping mechanism (moisture collector) provided on a surface of an absorbent material such as silica gel or activated carbon in such a fashion that the absorbent material is covered with the dew condensation trapping mechanism. The moisture collector has a structure obtained by stacking a plurality of mesh sheets; a structure formed from a porous material having good air permeability, such as a sponge; a structure obtained by aligning fibers in the form of a brush; or the like. Three-dimensional narrow spaces are formed in each of the moisture collectors, and excessive moisture in the environment is condensed primarily inside each of the narrow spaces because a vapor pressure inside the narrow space is relatively low. The moisture absorbing mechanism is attached to a base inside a magnetic disk drive or the like with an adhesive.

Moisture absorbing mechanism and magnetic disk drive

Formation of wear powder caused by wear of a ramp which is attributable to mutual contact of a lift tab and the ramp is to be reduced in loading and unloading operations. In one embodiment, a spindle motor is turned on by application of power, then the temperature of a ramp is measured and it is determined whether the temperature of the ramp has reached a preset temperature (about 25&#xb0; C.) or not. If the answer is negative, a heater is energized to heat the ramp for raising the temperature of the ramp. When it is detected that the temperature of the ramp has reached the preset temperature, the heating of the ramp is stopped and the execution of loading and unloading operations is permitted, then an ordinary processing is started.

Load/unload mechanism for magnetic disk drive

A magnetic disk drive has an external environment monitoring function. Data is stored on available disk media while the magnetic disk drive is in an unfavorable environment. Under favorable conditions, the data is then moved to a write-restricted area of the media, which was unavailable while the magnetic disk drive was in the unfavorable environment. The magnetic disk drive uses a temperature sensor/atmospheric pressure sensor as a monitoring device and exercises a function, for example, for reading a reference signal stored in a predetermined area of the medium at predefined intervals. When the external environment is favorable for the magnetic disk drive, the present invention can increase the information storage capacity determined appropriate under the current operating conditions.

Magnetic disk drive operating under a low-pressure environment and controlling the same

Gas contaminants generated from the grease of bearings operating in a magnetic disk device adhere to the magnetic head and causing stiction and magnetic head crash. Such bearings are typically spindle bearings and pivot bearings. In operation, heat is generated that causes the bearing grease to generate the gases. By heat treating the grease, slow evaporating substances of hydrocarbon compounds with carbons of C9 to C13 in the grease are reduced to not more than 0.001 wt. % of the grease. The grease can then be used to lubricate the bearings. The heat treatment is performed at a temperature of 60.degree. to 100.degree. C. at a pressure of 10.sup.-3 to 10.sup.-8 torr. The assembled, lubricated bearings can be heat treated separately from the magnetic disk device or the heat treatment can take place after the bearings have been assembled in the magnetic disk device.

Bearing and manufacturing method of bearing, and magnetic disk device

Growing community of inventors

Kanagawa, Japan

Kazuhisa Murakami