Abstract: A tape guide roller, for use with a tape drive that is configured to receive a length of tape, includes a roller body having an outer surface with one or more grooved areas and one or more non-grooved areas. The one or more grooved areas make up seventy-five percent or less of the outer surface, and the one or more non-grooved areas make up at least twenty-five percent of the outer surface. Furthermore, the one or more grooved areas are configured to affect traction between the roller body and the tape as the tape passes over the roller body.
Abstract: An apparatus includes a read/write head disposed on a slider, a control circuit disposed on the slider, and an adjustable delay line disposed on the slider. The adjustable delay line delays transmission of aligned write data to the read/write head by an adjustable delay. The adjustable delay is controlled by the control circuit a function of read synchronization data provided by the read/write head.
Abstract: As imaging devices are miniaturized, and optical devices are miniaturized, lens moving mechanisms are also miniaturized. Thus, position sensors for them are required to be miniaturized and have high accuracy at low cost. A magnet of a pillar shape and a yoke which move in the X axis direction with respect to a magnetic field detection element are provided, and a shape of a cross section of the yoke which is orthogonal to a longitudinal direction of the magnet changes along the longitudinal direction.
Abstract: A disc device for recording and/or reproducing information with respect to a disc having flexibility includes a head for writing and/or reading, the head being disposed below the disc; a disc rotating section which rotates the disc; and a head retracting section which retracts the head to a retracted position where contact with the disc is avoidable, based on a judgment that power supply to the disc device is cut off.
Abstract: There are provided a motor and a recording disc driving device, which may improve a coupling structure of the motor to enable a magnet provided in a rotor to thereby double as a conventional stopper. The motor may include: a sleeve into which a shaft is rotatably inserted; a sleeve holder including a body part into which the sleeve is inserted, and a flange part protruded from an upper end portion of the body part in an outer diameter direction; a rotor case fastened to an upper end portion of the shaft, and formed such that a cylindrically shaped-rotor main wall is protruded downwardly in an axial direction to receive the flange part; a magnet fastened to a distal end of the rotor main wall so that a part of the magnet is protruded downwardly of the flange part; and a stator fastened to face the magnet, and generating an electromagnetic force.
Abstract: Approaches for helping to decrease the amount of inactive gas necessary for reflow to interconnect connection terminals of a head slider and a suspension. Inactive gas is blown from a nozzle of a reflow apparatus toward interconnection joints of a head slider and a suspension. The head slider is bonded onto a gimbal tongue. The nozzle comprises a duct through which the inactive gas passes and a porous member fitted in an ejection outlet of the tube. Placing the porous member close to the head slider achieves effective reduction of oxygen concentration around solder balls.
July 25, 2008
Date of Patent:
July 26, 2011
Hitachi Global Storage Technologies Netherlands B.V.
Abstract: A hard disk drive (HDD) including a slider limiter. The HDD includes a spindle motor installed to a base member; at least one disk mounted to the spindle motor to be rotated by the spindle motor; an actuator moving a read/write head to a desired position on the at least one disk; and a ramp that is installed outside the at least one disk to park the read/write head when the at least one disk stops rotating. A slider limiter that is disposed between the flexures facing each other in order to limit vertical fluctuation of the slider is formed on the ramp. A step portion or a hollow space is formed in a portion of the slider limiter facing the slider, and a side-tab is protruded from both sides of the flexure to face the slider limiter on both sides of the hollow space.
Abstract: Systems and methods for transferring data between storage components in a device. During a user interaction, at least some of the data to be transferred is loaded from an electromechanical data storage arrangement into an electronic storage. The transfer of data may begin prior to an end of the user interaction and may be completed, when possible, during the user interaction. The transfer of data between the storage components may be avoided in times that precede and follow the user interactions. If additional data transfers are required, the additional data is transferred during subsequent user interactions to avoid situations where mechanical shock could cause damage to one of the storage components as the data is accessed and transferred.
April 7, 2005
Date of Patent:
March 30, 2010
Curtis H. Bruner, John F. Fletcher, Frida E. R. Fletcher
Abstract: A hard disk drive is provided with a ramp mechanism at the side of the disks for holding head sliders when the disks do not rotate. The ramp mechanism includes a ramp unit at least partially opposed to an outer edge of each disk medium. A roller provided in the ramp unit rotatably contacts the outer edge of the disk medium when the outer edge of the disk medium deflects with respect to its rotation axis.
Abstract: Laser beam irradiation areas are provided in a load curve portion and an angle adjustment portion of a suspension. The laser beam irradiation areas are oriented in a direction in which the suspension is to be bent. A laser beam having a predetermined length and a predetermined shape is irradiated onto each laser beam irradiation area.
Abstract: A magnetic head incorporates: a medium facing surface; a coil; a pole layer; first and second shields disposed to sandwich the pole layer therebetween; a first gap layer disposed between the first shield and the pole layer; a second gap layer disposed between the second shield and the pole layer; and a substrate. The first shield is located closer to the substrate than the second shield. The magnetic head further incorporates an antireflection film disposed between the first shield and the first gap layer or between the first gap layer and the pole layer. The pole layer is formed by frame plating.
Abstract: Single write poles tend to large shape anisotropy which results in a very large remnant field when not actually writing. This has now been eliminated by giving the write pole the form of a three layer laminate in which two ferromagnetic layers are separated by a non-magnetic or antiferromagnetic coupling layer. Strong magnetostatic coupling between the outer layers causes their magnetization directions to automatically be antiparallel to one another, unless overcome by the more powerful write field, leaving the structure with a low net magnetic moment. The thickness of the middle layer must be carefully controlled.
May 16, 2006
Date of Patent:
September 2, 2008
Headay Technologies, Inc.
Kochan Ju, Lijie Guan, Jeiwei Chang, Min Li, Ben Hu
Abstract: An embodiment of a system for storing information in accordance with the present invention comprises a media including a barrier layer, an isolation layer and a trapping layer disposed between the barrier layer and the isolation layer; and a tip adapted to inject a charge through the barrier layer and into the trapping layer.
Abstract: A magnetoresistive reproducing head includes first and second free magnetic layers. A non-magnetic layer is provided between the first and second free magnetic layers. A bias applying layer having a single region applies a bias magnetic field in a direction perpendicular to the medium facing plane of the first free-magnetic layer and the second free-magnetic layer. An electrode is electrically connected to the first free-magnetic layer, the second free-magnetic layer, and the non-magnetic layer. In response to a magnetic field generated when a current is applied to the first free-magnetic layer, the second free-magnetic layer, and the non-magnetic layer in a direction perpendicular to the medium facing plane, magnetizations of the first free-magnetic and the second free-magnetic layer are tilted in opposite directions from a direction perpendicular to the medium facing plane.
November 5, 2007
May 22, 2008
Hideyuki Akimoto, Naoki Mukoyama, Jun Masuko
Abstract: A carriage for a disc device, which has a top arm, bottom arm, and mid arm, has a main mode, end arm mode, and mid arm mode as a frequency response obtained when subjected to a vertical shake. In the main mode, all of the top, bottom, and mid arms swing at a first frequency within the same phase in a primary bending mode. In an end arm mode, the top and bottom arms swing at a second frequency higher than the first frequency within opposite phases and with an amplitude larger than that of the mid arm. In the mid arm mode, the mid arm swings at a third frequency having a difference of 50 Hz or less from the second frequency within the same phase as in the main mode, and the top and bottom arms swing within the phase opposite from that in the main mode.
Abstract: An exemplary embodiment provides for a servo-actuated, head actuator design wherein a head carriage includes one or more positional sensor location features that precisely define placement. The sensor location features are configured such that a positional sensor can be mated into a specific sensor location feature. As the head carriage is typically manufactured with great accuracy, the inclusion and placement of the sensor location features will also be extremely accurate. As a result, the location of positional sensors can be pre-defined via the head carriage design such that they will be at a precise location with respect to a magnetic head attached to the head carriage, thereby reducing variation in the location of one or more positional sensors resulting from a tape drive assembly process.
Abstract: Disclosed is a low-cost servo writer with a simple adjusting mechanism, which can record/reproduce servo signals on or from magnetic tapes precisely, and which makes it possible to shorten the adjusting and maintenance time and to minimize the uneven wear of its heads, thereby decreasing the level of contaminant of the heads. The servo writer includes (a) a head for recording/reproducing servo signals on or from a running tape, (b) a base, (c) a support arm having two ends, one of the ends being supported by the base, the other being a free end where the head is placed, wherein a position of the head relative to the tape is adjustable, and (d) tape guides for maintaining a constant lap angle, the tape guides being arranged on the free end of the support arm, wherein the lap angle is an angle which the head forms with the running tape.
Abstract: A data processing system including a data storage device having data stored on a data storage medium. Within said data processing system, a system electronics is operatively coupled to a sensor and to said data storage device. When the sensor senses a change in gravitational or inertial acceleration of said data processing system, it alerts system electronics to temporarily park a read/write head in a safe position.
Abstract: A read/write head assembly (20) is provided for use in a mass storage device such as a hard disk. drive. The read/write head assembly (20) is positioned on a suspension arm (18) and includes a read/write head (24) and a head lifter (22). The head lifter (22) positions the read/write head (24) in a first position and a second position.
Abstract: One joint member having a melting point different from that of the other joint member is joined to each bonding pad of a slider and further joined to each bonding pad of a suspension through the other joint member. The slider is exfoliated from the suspension in the state that the one joint member is attached to the slider by heating and melting the other joint member.
Abstract: Disclosed is a head base shift mechanism in an auto-reverse cassette tape recorder comprising a motor (2); a chassis (1) with a pair of capstans (41), (41′) rotatable in forward and reverse directions; a head base (15) slidably mounted on the chassis and carrying at least a head (16) substantially at a center of the head base; a pair of pinch rollers (17), (17′) for forward play and reverse play arranged in a substantially symmetric design at opposite sides of the head; spring means (23) for biasing the head base toward a stand-by position remote from a tape running plane (T) defined by and between the capstans; a pair of engagement members (272), (272′) engageable with the head base at a point offset from a center line (X) of the chassis; and rotation transmission means (10) for moving one of the engagement members, selected depending upon the direction of rotation of the motor, while in engagement with the head base at the offset point, thereby moving the head base from the stand-by positi
Abstract: An improved bearing cartridge to rotationally couple an actuator block supporting a plurality of heads to a chassis of a disc drive. The improved bearing cartridge having increased radial stiffness and including first and second concentrically aligned elongated sleeves. The first sleeve is coupled to the chassis and the second sleeve is coupled to the actuator block. The first and second sleeves are spaced to define a rotation gap therebetween. The bearing cartridge includes first and second spaced bearings positioned proximate to opposed ends of one of said first or second sleeves and at least one intermediate bearing spaced from the first and second bearings and positioned between the first and second bearings to rotationally connect the first and second sleeves.