Abstract: A hard disc drive cover-integrated gasket, which comprises a metallic cover and a packing material integrated with the metallic cover, the packing material being a molding material from a mixture comprising 100 parts by weight of EPDM or a blend of EPDM and polystyrene type thermoplastic elastomer, 10–100 parts by weight of polypropylene type resin, 20–130 parts by weight of a plasticizer and 0.1–10 parts by weight of a cross-linking agent is easy to fabricate and has distinguished characteristics as low outgassing characteristics, low hardness, good sealability at elevated temperatures, etc.

Abstract: A magnetic head having an air bearing surface is used to reduce thermal pole tip protrusion and recession. The magnetic head includes a substrate and a data transducer positioned upon the substrate adjacent the air bearing surface. The data transducer is comprised of a plurality of metallic layers. A compensation structure is positioned adjacent to at least one of the plurality of metallic layers, is exposed at the air bearing surface or recessed at the ABS and extends substantially perpendicular from the air bearing surface. The compensation structure is formed of a material having a coefficient of thermal expansion less than a coefficient of thermal expansion of a material forming the substrate.

Abstract: A magnetic head having an air bearing surface reads and writes data to and from a disc. The magnetic head includes a substrate and a data transducer positioned upon the substrate adjacent the a bearing surface. The data transducer includes a plurality of metallic layers wherein each metallic layer has a top surface. An isolated transducer portion is isolated from the data transducer and recessed from the air bearing surface. The isolated transducer portion has a top surface wherein the top surface of the isolated transducer portion is positioned coplanar to the top surface of one of the plurality of metallic layers of the data transducer.

Abstract: An actuator locking apparatus for a hard disk drive having a voice coil motor with at least one magnet attached to at least one of an upper yoke and a lower yoke of the voice coil motor to maintain a magnetic head mounted on an actuator of the hard disk drive in a parked state, the apparatus including a coupling protrusion protruding from an end of an arm of the actuator; a contact part protruding from an edge of either the upper yoke or the lower yoke, contacting a surface of the other of the upper yoke or the lower yoke, and having a slot at a height corresponding to a center of the coupling protrusion; a damping member having a coupling hole in which the coupling protrusion is inserted; and a metal piece attached to one side of the damping member and adhering to the contact part due to magnetic force when the magnetic head is parked.

Abstract: A disk drive system and method for implementing the same. The disk drive system of the present invention includes a discoid medium which rotates about its rotation axis and stores data. An actuator includes a head for reading or writing data from or in the discoid medium as it bidirectionally rotates about its bidirectional-rotation axis. The disk drive system further includes a housing which has a predetermined width and houses the discoid medium and the actuator, wherein the rotation axis of the discoid medium and the bidirectional-rotation axis of the actuator are arranged at the center in the width direction of the housing, and wherein size of the discoid medium is smaller than that of a discoid medium corresponding to a form factor of the housing.

Abstract: An apparatus for patterning a self-aligned coil using a damascene process is disclosed. Coil pockets are formed in a first insulation layer disposed over a first pole layer. A barrier/seed layer is deposited along walls of the coil pockets in the insulation layer. Copper is formed in the coil pockets and over the insulation layer. The copper is planarized down to the insulation layer. The self-aligned coil process packs more copper into the same coil pocket and relaxes the coil alignment tolerance. Protrusions are prevented because of the more efficient and uniform spacing of the coil to reduce heat buildup in the head during a write.

Abstract: A thin-film magnetic head comprises a top pole layer incorporating a throat height defining layer, an intermediate layer, and a yoke portion layer. The yoke portion layer includes a track width defining portion for defining the track width. Each of the throat height defining layer, the intermediate layer, and the track width defining portion has a width equal to the track width. The length of the intermediate layer is greater than the length of the throat height defining layer, and the length of the yoke portion layer is greater than the length of the intermediate layer, each of the lengths being taken in the direction orthogonal to the air bearing surface.

Abstract: The present invention includes gimbal having an attachment portion and a head support structure spaced apart from the attachment portion. A first strut connects the attachment portion and the head support structure. The first strut has an increased center portion and two end portions on opposite sides of the center portion. The increased center portion has a greater thickness than the two end portions. The gimbal also includes a second strut spaced apart from the first strut and is connected to the attachment portion and the head support structure. The second strut has an increased center portion and two end portions on opposite sides of the increased center portion. The increased center portion of the second strut has a greater thickness than the two end portions.

Abstract: A data storage device includes a baseplate (10), a head stack (50), a disk stack (90), a spindle motor (80) first damper (20) and second dampers (30). The head stack is received in the baseplate with the second damper underlying between the head stack and the baseplate. The disk stack combined with the spindle motor is received in the baseplate with the first damper underlying between the disk stack and the baseplate for absorbing vibration and improving dynamic head loading property of the data storage device.

Abstract: Disclosed is a head drum assembly of a tape recorder. An elastic body is mounted between upper and lower bearings as preloading means, in which the upper and lower bearings are interposed between a rotary drum and the shaft. As a result, the elastic body elastically biases the inner races of the upper and lower bearings upwardly and downwardly, respectively, whereby preload can be applied to each of the upper and lower bearings.

Abstract: Disclosed herein is a magnetic head for perpendicular recording in which the main magnetic pole has reduced remanent magnetization and is less liable to cause erasure after recording. These characteristic properties were realized by constructing the magnetic head such that the recording magnetic pole and the yoke are separate from each other and the main magnetic pole is formed from a material with a high saturation magnetic flux density and the yoke is formed from a material having a negative magnetostriction constant.

Abstract: A hard disc drive cover-integrated gasket, which comprises a metallic cover and a packing material integrated with the metallic cover, the packing material being a molding material from a mixture comprising 100 parts by weight of EPDM or a blend of EPDM and polystyrene type thermoplastic elastomer, 10–100 parts by weight of polypropylene type resin, 20–130 parts by weight of a plasticizer and 0.1–10 parts by weight of a cross-linking agent is easy to fabricate and has distinguished characteristics as low outgassing characteristics, low hardness, good sealability at elevated temperatures, etc.

Abstract: A magnetic head slider mounted on a magnetic disk unit for supporting a magnetic head that writes and reads information to and from a magnetic disk is constructed such that a depth ?s1 from the surfaces of leading and trailing pads, which come into contact with a medium surface when the disk is at rest, to stepped surfaces formed on the air inflow side of the leading pads, a depth ?s2 from the contact surfaces to stepped surfaces formed on the air inflow side of the trailing pad and a step depth ?s3 from the contact surfaces to the surfaces of side rails are in a relation of ?s1??s2??s3. With this arrangement, the slider can follow the waved medium surface at a low flying height with a small flying height fluctuation, thus realizing high density recording, high reliability and reduced cost of the magnetic disk unit.

Abstract: A low stiffness, high torsion disk drive suspension having reduced gram load change after backbending includes a laminate of a metal layer, a plastic film layer and a plurality of conductors, a spring portion, a base portion and a distal portion with contiguous discontinuities that reduce the vertical stiffness of the suspension with only a low reduction in torsion, and that limit gram load changes by preventing stretching of the plastic film that would otherwise accompany backbending of the spring portion of the suspension.

Abstract: A magnetic head is composed to diminish disordered writing bits of a recording layer or reading noise caused by a magnetic field generated from an under layer without decreasing a writing magnetic field strength of the magnetic head. The magnetic head includes a write head provided with a main pole and one or more auxiliary poles, a read head provided with a read element, and coils located on both sides of the main pole in a manner to sandwich the main pole. The coil located on one side generates the asymmetrical magneto-motive force for magnetizing the main pole to that generated by the coil located on the other side.

Abstract: The invention includes a magnetic recording head that has at least one structure or substructure that is made of a semiconductor material that protects the head from damage or destruction arising from stray current flow or unwanted electrostatic discharge during manufacture, assembly or use. The semiconductor material acts as a dissipative pathway to drain unwanted charges from the structure. The invention also includes a magnetic recording head that includes a substrate and a reader portion in the substrate, the substrate comprising a semiconductor material.

Abstract: A magnetic head parking system of a hard disk drive to move a magnetic head mounted on a slider of an actuator from a data zone of a disk and to place the magnetic head in a parking zone thereof when the disk stops rotating. The magnetic head parking system includes a head limiter provided on an upper surface of a flange of a spindle motor to protrude toward the disk and restricting a range of movement in upward and downward directions of the magnetic head placed in the parking zone of the disk. The head limiter is provided at a position opposite to a position where the slider of the actuator is installed or at a position deviating from and/or adjacent to a position directly under the slider. Thus, when an external impact is applied and an operation of the hard disk drive is stopped, the range of the up and down movement of the magnetic head is limited by the head limiter, so that the possibility of the damage to the magnetic head due to the head slap can be lowered.

Abstract: A disk cartridge comprising a flat housing and a recording disk medium. The flat housing is constructed of upper and lower metal shells, and the recording disk medium is rotatably enclosed within the housing. The housing is assembled by mechanically linking the circumferential edge portions of the upper and lower shells together.

Abstract: The magnetic head is formed with a narrow pole tip, and a pole tip heating element is fabricated to reduce the pole tip stress and increase its permeability, such that the magnetization switching speed of the pole tip is increased. The heating element is preferably electrically interconnected within the induction coil circuit of the magnetic head, such that the electrical current flowing through the induction coil also flows through the heating element. In a preferred embodiment, the heating element is fabricated above the second magnetic pole. The heating element is preferably formed with a resistance of approximately 0.2 to 1.0 ohms, such that the approximately 40 mA current that flows through the induction coil and the heating element creates a heating energy of the heating element of approximately 0.3 to 1.6 mW. The heating element can be comprised of a variety of materials such as Cu, W, NiFe, NiCr and IrRh.

Abstract: A filtering apparatus of a hard disk drive includes a filter filtering particles from air flowing inside a housing which includes a base plate and a cover plate, and two holders installed inside the housing and having support grooves supporting both end portions of the filter. The filter includes a filtering portion through which the flowing air passes and particles are filtered from the flowing air, and an insertion portion included at both end portions of the filtering portion and inserted into the support grooves forming a seal. Thus, since no gap is generated between the support groove of the holder and the insertion portion of the filter, all the air flowing toward the filter passes through the filtering portion. Also, the flow of air passing through the filtering portion is smooth, so that an efficiency of filtering tiny particles included in the air flowing in the hard disk drive is improved.