Abstract: In one embodiment, a magnetic head includes a main pole configured to write data to a magnetic medium, a trailing shield positioned on a trailing side of the main pole, and a STO between the main pole and the trailing shield, wherein the STO includes a laminated structure having a FGL, a spun polarization layer (SPL), and a non-magnetic spacer positioned between the FGL and the SPL, wherein the FGL includes a laminated structure having one or more layers of a CoFe alloy and a Heusler alloy alternately laminated in this order from an end of the FGL closest to the non-magnetic spacer. In another embodiment, a method is presented for forming such a magnetic head utilizing a FGL that includes a laminated structure baying layers of a CoFe alloy and a Heusler alloy alternately laminated in this order from an end of the FGL closest to the non-magnetic spacer.

Abstract: A thin film magnetic recording head is fabricated by forming a substrate from opposing ferrite blocks which have a ceramic member bonded between them. This structure is then diced to form a plurality of columns, wherein each column has a ferrite/ceramic combination. Each column represents a single channel in the completed head. A block of ceramic is then cut to match the columned structure and the two are bonded together. The bonded structure is then cut or ground until a head is formed, having ceramic disposed between each channel. A ferrite back-gap is then added to each channel, minimizing the reluctance of the flux path. The thin film is patterned on the head to optimize various channel configurations.

Abstract: A method for manufacturing a thermally-assisted magnetic recording head is provided, in which joined are: a light source unit that includes a light source having a surface including a light-emission center on the joining surface side of a unit substrate; and a slider that includes an optical system having a light-receiving end surface reaching a back surface opposite to the opposed-to-medium surface. This method utilizes “semi-active alignment” that uses an alignment light, and comprises steps of: causing a light to enter the light source from a surface opposite to the light-emission center; detecting the light that has passed through the light source and is emitted from the light-emission center to align the light-emission center with the light-receiving end surface of the slider; and bonding the light source unit to the slider. This manufacturing method can achieve the alignment with a sufficiently high alignment accuracy in a short processing time.

Abstract: A method of assembling a recording head includes attaching a first segment having a plurality of toroidal coils to a second segment having a plurality of flexure beams to form a wafer assembly. The method also includes attaching the wafer assembly to a slider body such that a cavity portion of the second segment cooperates with a cavity portion in the slider body to form a transducer cavity. The method also includes vacuum attaching the slider body to a reference flat surface. The method also includes positioning a transducer body having a transducer in the transducer cavity using a touch sensor.

Abstract: A method for forming a planarized surface for at least one bar of sliders for utilization in a hard disk drive is disclosed. In general, at least one bar of sliders is placed on an adhesive layer. A single thermoplastic layer is then provided above the at least one bar of sliders. The single thermoplastic layer is then heated to a softening temperature such that the single thermoplastic layer will flow between the at least one bar of sliders. The single thermoplastic layer is then cooled to form a planarized surface of both said single thermoplastic layer and said at least one bar of sliders at said adhesive layer.

Abstract: There is provided a rotating electric machine capable of reducing torque pulsation, even when a slight stepped portion is present in an inner diameter shape of a stator core formed by allowing coupling split cores divided in every magnetic pole to be in an annular shape. The stator core is formed by stacking a plurality of laminates prepared by stack of coupling split core members formed by punching steel sheets in an annularly arranged shape in a state where the laminates are rotated one another by a predetermined angle. With such a configuration, it is possible to mutually offset torque pulsation components caused by the shape asymmetry of the laminates and reduce the torque pulsation components of the stator core on the whole.

Abstract: A perpendicular recording thin-film magnetic head comprises a main magnetic pole having a tip main magnetic pole part extending in a height direction from a medium-opposing surface and a base main magnetic pole part connected to the tip main magnetic pole part on a side opposite from the medium-opposing surface side and wider than the tip main magnetic pole part in a track width direction; a return yoke extending in the height direction from the medium-opposing surface and magnetically coupling with the base main magnetic pole part at a position distanced from the medium-opposing surface in the height direction, while opposing the tip main magnetic pole part through a write gap layer in a bit length direction in the medium-opposing surface; and a main magnetic pole adjacent magnetic shield layer extending along at least part of side faces of the main magnetic pole other than the medium-opposing surface as seen in a laminating direction, while holding a nonmagnetic layer between the main magnetic pole and the

Abstract: The manufacturing device for bending an electromagnetic element of an electrical machine, which includes a stator lamination (5), has a first device (10) for bending the stator lamination (5) to form a pre-curved stator lamination and a second device (25) for final forming of the pre-curved stator lamination. The second device (25) includes a first assembly (29) for axially fixing and pressing the pre-curved stator lamination and a second assembly for radially centering and pressing the pre-curved stator lamination. The first device (10) includes a bending mandrel (11) around which the stator lamination (5) bendable, which has an outer diameter that is larger than an inner diameter of the fully bent electromagnetic element.

Abstract: The application discloses processes for fabricating a slider or head for a data storage device. The processes disclosed provide a transducer portion that is separated from a slider body by a gap. In an illustrated embodiment, actuator elements are fabricated in the gap to adjust a position of the transducer portion relative to the slider body.

Abstract: A method for bonding slider row bars for photolithography process, includes steps of: providing a first carrier plate having a sticky surface; providing slider row bars each having a first surface for forming ABS and an opposite second surface, and securing each slider row bar to the first carrier plate with its first surface facing the sticky surface; providing an encapsulation glue and dispensing it to the second surfaces and gaps between the slider row bars; providing a second carrier plate and attaching it to the second surfaces through the encapsulation glue; irradiating the first carrier plate and the encapsulation glue with ultraviolet light such that the first carrier plate is removed from the slider row bars, and the encapsulation glue is cured to bond the slider row bars with the second carrier plate together.

Abstract: A method of making a slider includes the steps of laminating the bottom-facing surface of a third layer to the upper-facing surface of a fourth layer, laminating the bottom-facing surface of a second layer to the upper-facing surface of the third layer in a heat-compression mold, heat-pressing the combined second, third and fourth layers in the mold to form a desired shape, and heat pressing a first layer on top of the second layer inside the mold.

Abstract: A method of manufacturing a magnetic core includes providing a substrate with magnetically permeable material that has a first region and a second region near the first region, providing support to maintain a juxtaposition between the first region and the second region, forming a slit through the magnetically permeable material between the first region and the second region, introducing a binding agent into the slit and removing the support; wherein the binding agent maintains the juxtaposition between the first region and the second region after the support is removed.

Abstract: A method for making a magnetic head formed with a pair of magnetic core halves fitted to abut on each other having a nonmagnetic gap therebetween and having a slide contact plane for slide contact with a magnetic recording medium on which an end face of the nonmagnetic gap and the magnetic core halves. In the method, a nonmagnetic portion formed by filling a glass material is provided at an end portion of the slide contact plane other than the end face of the magnetic core halves on the slide contact plane.

Abstract: A method for making a tunnel valve head with a flux guide. The tunnel valve sensor is created by forming a tunnel valve at a first shield layer. The tunnel valve includes a free layer distal to the first shield layer, a first insulation layer deposited over the first shield layer and around the tunnel valve, a flux guide formed over the first insulation layer and coupling to the tunnel valve at the free layer, a second insulation layer formed over the flux guide and a second shield layer formed over the second insulation layer. The flux guide and the free layer are physically isolated by the first and second insulation layers to prevent current shunts therefrom. The structure achieves physical connection between the flux guide and the free layer and insulates the flux guide from the shields.

Abstract: When a magnetic tape material is slit into a plurality of magnetic tapes, projections are formed in edge portions of side surfaces of the magnetic tapes. The projections are removed by pressing cutting tools against the edge portions of the side surfaces of the magnetic tape while transporting the magnetic tape. Thus, product quality of the magnetic tape is improved.

Abstract: A slider comprises a slider section and a reproducing head section. The slider section has a first medium facing surface, an air inflow end, and a recording head. The reproducing head section has a second medium facing surface, an air outflow end, and a reproducing head. The slider section and the reproducing head section are fabricated separately, and bonded to each other so that the first medium facing surface and the second medium facing surface are continuous.

Abstract: A voice coil and actuator yoke assembly is fabricated by deforming the coil to exactly fit the inner perimeter and thickness of the yoke. The comb is placed in a tool that registers the comb with the yoke against the same flat surfaces that will squash the coil. The tooling is closed and placed in an appropriate loading device and the coils are squashed to the precise thickness of the yoke. This eliminates the in-plane tolerances of the current process for bonding a coil into the yoke. The coil perimeter expands as the coil is squashed to form an intimate press fit with the yoke. A low viscosity, high Tg adhesive is then applied to the coil. The low viscosity of the adhesive allows capillary action to fill the voids between the wires and bond the coil to the yoke.

Abstract: Methods of forming a head assembly, a head assembly, and a linear tape drive are provided. One aspect provides a method of forming a head assembly including providing a base member; forming a plurality of head components upon the base member individually adapted to communicate information relative to a tape; providing a plurality of component regions adjacent respective ones of the head components and a path of travel of the tape; and providing a support region intermediate adjacent ones of the head components and positioned to support the tape moving along the path of travel, the support region comprising a material different than a material of the component regions.

Abstract: A slider comprises a slider section and an element section. The slider section has a first medium facing surface and an air inflow end. The element section has a second medium facing surface, an air outflow end, and a thin-film magnetic head element. The slider section and the element section are produced separately, and bonded to each other so that the air inflow end and the air outflow end are disposed on opposite sides with the first and second medium facing surfaces in between.

Abstract: A method for producing a magnetic head, including the steps of forming a magnetic body on a substrate, the magnetic body including a principal plane facing the substrate and a rear plane opposite to the principal plane; applying a beam to the rear plane of the magnetic body and forming a portion defining a hole extending from the rear plane to the principal plane; forming a magnetic gap in the hole; and separating the magnetic body and the magnetic gap from the substrate and forming medium facing surface substantially coplanar with the principal plane.

Abstract: Disclosed herein is a method including the steps of cutting a wafer to prepare a row block having a plurality of head elements arranged in a matrix, bonding a plate member to one side surface of the row block, bonding a row tool to another side surface of the row block bonded to the plate member opposite to the one side surface, and cutting the row block to prepare a row bar bonded to the row tool and having a row of the head elements. A bonding apparatus for realizing the above bonding steps is also disclosed.

Abstract: A method of simultaneously forming magnetic transition patterns in both side surfaces of a dual-sided magnetic or magneto-optical (MO) recording medium comprises steps of: (a) providing a dual-sided magnetic or MO recording medium having first and second opposing side surfaces; (b) providing a first magnetic stamper/imprinter having a first topographically patterned imprinting surface comprising a plurality of projections and depressions arranged in a first pattern corresponding to a first magnetic transition pattern to be formed in the first side surface; (c) providing a second magnetic stamper/imprinter having a second topographically patterned imprinting surface comprising a plurality of projections and depressions arranged in a second pattern corresponding to a second magnetic transition pattern to be formed in the second side surface, the second magnetic stamper/imprinter being formed from the first magnetic stamper/imprinter in a “mother”/“son” relationship; (d) contacting the first side surface with th

Abstract: A magnetic tape head assembly is provided along with a method of manufacturing a magnetic tape head. The magnetic tape head comprises a cluster of thin film inductive or magnetoresistive read/write elements, an I-block preferably made of a ceramic material, a U-bar also preferably made of a ceramic material, and a base preferably made of a ceramic or metal material. The U-bar has a substantially U-shaped form providing a recess into which the I-block and the cluster are fixed. A bottom surface of the U-bar, I-block, and cluster is fixed to the base to form a slider assembly. A top surface of the U-bar, I-block, and cluster is machined or etched to form one or more tape bearing surfaces thereon.

Abstract: A method of firing magnetic cores includes the steps of attaching a powder to the surface of a plurality of flattened-ring compact bodies made of a magnetic material, arranging the plurality of flattened-ring compact bodies adjacently so that the axes of flattened through-holes of the flattened-ring compact bodies are vertically oriented, and firing the flattened-ring compact bodies while the powder is interposed between the adjacent flattened-ring compact bodies. Alternatively, a method of firing magnetic cores includes the steps of attaching a powder to the surface of a plurality of thin compact bodies made of a magnetic material, vertically arranging the plurality of thin compact bodies adjacently, and firing the thin compact bodies while the powder is interposed between the adjacent thin compact bodies.

Abstract: A working method of a bar block with a plurality of magnetic head elements and a plurality of pairs of electrode terminals electrically connected to the plurality of magnetic head elements arranged on an element-formed surface of the bar block in at least one line. This method includes a step of pre-laminating an ACF on the element-formed surface of the bar block, a step of bonding a conductive plate member with a plurality of projections located at positions faced to the plurality of pairs of terminal electrodes of the bar block, respectively, on the ACF so that each pair of the terminal electrodes is electrically short-circuited with each other, and a step of, then, working the bar block.

Abstract: A slider comprises a slider section and an element section. The slider section has a first medium facing surface and an air inflow end. The element section has a second medium facing surface, an air outflow end, and a thin-film magnetic head element. The slider section and the element section are produced separately, and bonded to each other so that the air inflow end and the air outflow end are disposed on opposite sides with the first and second medium facing surfaces in between.

Abstract: In bottom spin valves of the lead overlay type the longitudinal bias field that stabilizes the device tends to fall off well before the gap is reached. This problem has been overcome by providing a manufacturing process that includes inserting an additional antiferromagnetic layer between the hard bias plugs and the overlaid leads. This additional antiferromagnetic layer and the lead layer are etched in the same operation to define the read gap, eliminating the possibility of misalignment between them. The extra antiferromagnetic layer is also longitudinally biased so there is no falloff in bias strength before the edge of the gap is reached. A process for manufacturing the device is also described.

Abstract: A method for forming top and bottom spin valve sensors and the sensors so formed, the sensors having a strongly coupled SyAP pinned layer and an ultra-thin antiferromagnetic pinning layer. The two strongly coupled ferromagnetic layers comprising the SyAP pinned layer in the top valve configuration are separated by a Ru spacer layer approximately 3 angstroms thick, while the two layers in the bottom spin valve configuration are separated by a Rh spacer layer approximately 5 angstroms thick. This allows the use of an ultra thin MnPt antiferromagnetic pinning layer of thickness between approximately 80 and approximately 150 angstroms. The sensor structure produced thereby is suitable for high density applications.

Abstract: A thin film magnetic recording head utilizing a timing based servo pattern is fabricated using a focused ion beam (FIB). The recording head is fabricated by sputtering a magnetically permeable thin film onto a substrate. A gap pattern, preferably a timing based pattern, is defined on the thin film and the FIB cuts a gap through the thin film based on that pattern. Once completed, the recording head is used to write a servo track onto magnetic tape. The timing based servo track then allows for the precise alignment of data read heads based on the positional information obtained by a servo read head which scans the continuously variable servo track.

Abstract: A method of manufacturing magnetic heads is provided in which a slider and a back yoke are joined to form a magnetic head main body. The main body is then fixedly bonded to a holding member that supports the magnetic head as a single unit. A plurality of such magnetic heads are placed circumferentially on a soft adhesive sheet attached to a cylindrical base block. Touch lapping is then performed to a slider surface of the magnetic heads with a slurry on a surface table. Processing faces of the heads can be positioned flush with the surface table due to an elasticity of the soft adhesive sheet, thereby equally minimizing lapping amounts.

Abstract: A batch fabrication technique is described that increases the manufacturing efficiency of servo write heads and also improves servo pattern definition for fine features, while reducing tape and head wear. Multiple heads are fabricated as a batch from one or more ferrite wafers. A nominally flat, large wafer surface and a contour suitable for uniform photoresist application an planar photolithography permit fine servo pattern definition with low linewidth variation. Non-magnetic material is photolithographically defined to produce gaps above a spacer. The non-magnetic material may be photoresist, semiconductor materials, glass, metal or the like. The material may even be removed later to leave air gaps. Additionally, a lower ferrite wafer may be mated to the upper ferrite wafer to complete a magnetic circuit around the gaps. A rounded leading edge on the head creates an air bearing to reduce ware of the tape and of the head.

Abstract: A method for easily sintering a magnetic core while preventing damage to the magnetic core caused by deformation or other problems, includes preparing a flattened tubular compact by forming the compact to have a flattened tubular shape and a through hole. A supporting plate made from a baked porcelain material or a metal material having a dimension that allows for insertion into the through hole of the flattened tubular compact, as well as a length that is sufficiently longer than that of the flattened tubular compact, is inserted through the through hole. The flattened tubular compact is placed inside of a sintering container having highly pure alumina powder spread therein so that the axial direction of the compact is horizontal. The flattened tubular compact is then sintered in a sintering furnace to produce the magnetic core.

Abstract: A slider comprises a slider section and a reproducing head section. The slider section has a first medium facing surface, an air inflow end, and a recording head. The reproducing head section has a second medium facing surface, an air outflow end, and a reproducing head. The slider section and the reproducing head section are fabricated separately, and bonded to each other so that the first medium facing surface and the second medium facing surface are continuous.

Abstract: A production method for a spin-valve type magnetoresistive element comprising laminating an antiferromagnetic layer, a pinned magnetic layer, a non-magnetic electrically conductive layer, a free magnetic layer, and a second antiferromagnetic layer. The second antiferromagnetic layer is located on the free magnetic layer and orients the magnetization direction of the free magnetic layer. In this method, a first thermal treatment is performed at a first temperature of ordering a crystal structure of the first antiferromagnetic layer or at a second temperature lower than a second blocking temperature of the second antiferromagnetic layer. After the first thermal treatment, a second thermal treatment is performed at a third temperature lower than a first blocking temperature of the first antiferromagnetic layer but higher than said second blocking temperature of the second antiferromagnetic layer.

Abstract: Method for producing a magnetic head of a pair of magnetic core halves combined with a nonmagnetic layer therebetween including forming a winding window in at least one of a pair of generally flat oxide magnetic plates, forming at least one underlying layer on each oxide magnetic plate, forming a metal magnetic thin film on the underlying layer containing magnetic crystalline particles having average volume Va and average surface area Sa fulfilling the relationship Sa>about 4.64 Va¾, forming a groove in a body including the oxide magnetic plate, underlying layer and metal magnetic thin film, and combining the body with another body including an oxide magnetic plate and a metal magnetic thin film with a nonmagnetic layer therebetween, where the metal magnetic thin film is formed in such a manner to prevent the oxide magnetic plates from cracking due to internal stress generated in the metal magnetic thin film.

Abstract: A method of manufacturing magnetic head slider including a ferrite core having read/write gap and a housing formed on non-magnetic material having a rail on a surface opposite to a magnetic recording medium. The ferrite core and the housing are bonded to each other. A core bond bar constituted by a continuation at least two cores and a stick-shaped for the housing are bonded to each other ten fine machined. After the fine machining, the bar is cut into individual magnetic head sliders.

Abstract: The present invention provides a fuel supply apparatus which has solved the problem occurring after the welding of a connecting ring, by which a core of an electromagnetic valve and a housing are connected together, finishes of the deformation of the connecting ring and a crack in a welded portion. In this apparatus, the core of the electromagnetic valve and housing are welded together at a welded portion via the connecting ring having an L-shaped cross-sectional shape. A groove for at least reducing the degree of the deformation, which occurs after the welding thererof is done, of the connecting ring, preferably a groove having a projecting open surface is formed on the portion of the surface of the housing which is in the vicinity of the welded portion.

Abstract: A working method of a bar block with a plurality of magnetic head elements and a plurality of pairs of electrode terminals electrically connected to the plurality of magnetic head elements arranged on an element-formed surface of the bar block in at least one line. This method includes a step of pre-laminating an ACF on the element-formed surface of the bar block, a step of bonding a conductive plate member with a plurality of projections located at positions faced to the plurality of pairs of terminal electrodes of the bar block, respectively, on the ACF so that each pair of the terminal electrodes is electrically short-circuited with each other, and a step of, then, working the bar block.

Abstract: A method of assembling a micro-actuator is provided in which a base frame having a plurality of actuator bases is placed on a stage, a first adhesive is applied to each of the actuator bases, and a base electrode frame having a plurality of base electrodes is placed on the first adhesive. The first adhesive is semi-cured by heating and pressing. A second adhesive is applied to each of the base electrodes, and a plurality of piezoelectric elements are placed on the second adhesive. The second adhesive is semi-cured by heating and pressing. A third adhesive is,applied to the piezoelectric elements, and a movable electrode frame having a plurality of movable electrodes is placed on the third adhesive. The third adhesive is semi-cured by heating and pressing. Next, a fourth adhesive is applied to each of the movable electrodes, and a hinge plate frame having a plurality of hinge plates is placed on the fourth adhesive. The fourth adhesive is semi-cured by heating and pressing.

Abstract: A manufacturing method achieves excellent magnetic recording characteristics by sequentially sputtering a non-magnetic under-layer, a non-magnetic intermediate layer, and a magnetic layer on a non-magnetic substrate in an atmosphere of H2O partial pressure of 2×10−10 Torr or lower. This process allows beneficial deposition of the magnetic layer and reduces raw materials costs. The magnetic layer includes ferromagnetic grains and non-magnetic grain boundaries. The intermediate layer has a hexagonal close-packed crystal structure. The manufacturing method allows manufacture of a high quality magnetic recording medium without a heating step thereby allowing use of lower cost materials, reduces manufacturing time, and increases savings.

Abstract: A thin film magnetic recording a timing based servo pattern is fabricated using a focused ion beam (FIB). The recording head is fabricated by sputtering a magnetically permeable thin film onto a substrate. A gap pattern, preferably a timing based pattern, is defined on the thin film and the FIB cuts a gap through the thin film based on that pattern. Once completed, the recording head is used to write a servo track onto magnetic tape. The timing based servo track then allows for the precise alignment of data read heads based on the positional information obtained by a servo read head which scans the continuously variable servo track.

Abstract: A magnetic head having optimum recording/reproducing characteristics and a method for producing the magnetic head. A pair of magnetic core halves 2, 3, each having a substrate 4 and a thin magnetic metal film 6 formed obliquely on it, are bonded together via a non-magnetic material C for defining a magnetic gap. A portion of the substrate faces a junction surface 8 of the magnetic core halves 2, 3. The substrate portion is arranged for facing an end face of the magnetic meta film 6 of the opposite side magnetic core half facing the junction surface 8.

Abstract: Manufacturing method of a magnetic head slider comprising a ferrite core having read/write gap and a housing of non-magnetic material having a rail on a surface opposite to a magnetic recording medium, the ferrite core and the housing being bonded to each other, a core bond bar constituted by continuation of two or more cores and a stick for the housing are bonded to each other and fine machining is applied thereto, and then the magnetic head slider is separated into individual sliders.

Abstract: A spin-valve magnetoresistive element includes a plurality of layers. The magnetic moment of a first pinned magnetic layer is smaller than the magnetic moment of a second pinned magnetic layer. In this case, a magnetic field of 100 to 1,000 Oe is applied in a direction opposite to the direction for which obtaining of magnetization for the first pinned magnetic layer is desired, or a magnetic field of 5 kOe or greater is applied in the same direction as the direction for which obtaining of magnetization for the first pinned magnetic layer is desired. Thus, a first magnetization of the first pinned magnetic layer and the magnetic moment of a second pinned magnetic layer can be maintained in an antiparallel state.

Abstract: A method for producing a magnetic head with reduced cross talk. A position of a projection for forming a magnetic gap on each of two magnetic core half bodies is adjusted by forming first and second position adjusting projections for having sidewall surfaces that are vertical relative to surfaces for forming track width adjusting grooves.