Entries |
Document | Title | Date |
20080231994 | Perpendicular recording magnetic head - Embodiments of the present invention provide a perpendicular recording magnetic head having a narrow track width, high recording magnetic field intensity, and a good recording magnetic field distribution. According to one embodiment, a perpendicular recording magnetic head includes a read section and a write section. The write section includes a main magnetic pole layer, a lower sub magnetic pole layer, an upper sub magnetic pole layer, a pedestal magnetic layer, and a coil conductor generating a magnetic flux in the main magnetic pole layer. The write section further includes lower and upper auxiliary magnetic pole layers disposed on a leading side and a trailing side, respectively, relative to a medium moving direction, adjacent to the main magnetic pole layer. The lower and upper auxiliary magnetic pole layers are retracted from an air bearing surface. The upper auxiliary magnetic pole layer is retracted from the air bearing surface less than the lower auxiliary magnetic pole layer. | 09-25-2008 |
20080239573 | Head Slider, Head Support Unit and Disk Drive Apparatus - A head slider which has a head part and which performs at least one of recording and reproducing by the head part in a state in which the head slider floats over a recording medium, which including: a first air bearing part which is disposed on an air inflow end side on a base surface; a second air bearing part which is disposed on an air outflow end side more than the first air bearing part on the base surface and which has the head part and has an area smaller than that of the first air bearing part; a pair of positive pressure generating parts which is disposed on both sides of a center axis of the head slider in the longitudinal direction closer to the air outflow end side than a step part formed of the first air bearing part and the base surface on the air inflow end side; a side rail parts which are disposed between the first air bearing part and one positive pressure generating part of the pair of positive pressure generating parts, and between the first air bearing part and the other positive pressure generating part of the pair of positive pressure generating parts; and an outside side rail parts which are disposed outside the pair of positive pressure generating parts with respect to the center axis of the head slider in the longitudinal direction. | 10-02-2008 |
20080239574 | SYSTEM AND APPARATUS FOR PROVIDING STREAMLINED CONTOUR AND REDUCED AXIAL FLOW AT THE ACTUATOR ATTACHMENT INTERFACE BETWEEN A FLEXIBLE CABLE AND FLEXURE - An airflow diverter is used to overcome the adverse effect of flow-induced vibration of a disk drive pivot actuator. The diverter may be formed as a separate component or as an integral portion of the flex stiffener or the actuator itself. The invention streamlines the actuator to the incoming airflow and helps reduce the torque disturbance to the actuator as it reduces the sail or parachute effect. This helps reduce power consumption due to a lower drag from the actuator assembly. The contour of the flow deflector is designed to conform closely to the curvature of the disk boundaries when the actuator is rotated to the ID position on the disk. This design serves as a shroud around the disk stack which further helps to reduce power by preserving flow momentum. | 10-02-2008 |
20080239575 | AIR BEARING SLIDER-DISK INTERFACE FOR SINGLE-SIDED RECORDING ON A METAL FOIL DISK - A slider assembly for supporting a recording element in operative relation to a flexible moving recording medium is disclosed. The slider may have a face including air bearing surfaces positioned toward the recording medium. A recording element may be in an air bearing surface near the trailing edge of the face, wherein there is no other slider or other supporting surface on an opposite side of the recording medium. A vacuum cavity may be formed in the face for creation of sub-ambient pressure to attract the slider toward the recording medium. An air bearing surface may be provided with a transverse pressure contour (TPC) along at least one of its edges for providing flying height control, with the TPC having a step geometry. A mounting device may mount the slider in a biased manner toward the recording medium and urge the slider toward the recording medium. | 10-02-2008 |
20080247089 | Slider designed to reduce fly height sigma - Embodiments of the present invention pertain to a slider designed to reduce fly height sigma. According to one embodiment, a slider includes an air bearing surface, a front shallow step pad, a rear shallow step pad, and rear side pockets. The front shallow step pad and the rear shallow step pad are at a first level deeper than the air bearing surface. The rear side pockets are at a second level deeper than the air bearing surface. The rear side pockets are in close proximity to rear corners of the slider. | 10-09-2008 |
20080253027 | MAGNETIC HEAD, HEAD ASSEMBLY AND MAGNETIC RECORDING / REPRODUCING APPARATUS - The present invention relates to a perpendicular recording magnetic head. A perpendicular recording element includes a main magnetic pole film for emitting a perpendicular magnetic field and is supported by a slider. The main magnetic pole film includes an electrode film and a plated film, the electrode film is an alloy film of at least one element selected from the platinum group and Ni, and the plated film is a magnetic film grown on the electrode film. | 10-16-2008 |
20080259498 | PERPENDICULAR WRITE HEAD WITH INDEPENDENT TRAILING SHIELD DESIGNS - A magnetic write head having independent trailing and side magnetic shields. The side shields and trailing shields are independently of one another so that they can have throat heights that are different from one another. This advantageously allows the magnetic potential between the write pole and side shields to be controlled independently of one another without relying on the side gap and trailing gap thicknesses. Furthermore, magnetic performance of the write head can be improved because the side shields can be constructed with varying tapered throat heights, while the throat height of the trailing shield can remain constant. | 10-23-2008 |
20080259499 | HEAD WITH A TRANSDUCER OVERCOAT HAVING A TRAILING AIR FLOW DAM THAT IS SHALLOWLY RECESSED FROM AN AIR BEARING SURFACE - A head includes a transducer and a slider having an air bearing surface (ABS) and a trailing face. The slider has an overcoat layer that includes the trailing face and that overcoats the transducer. The ABS includes a trailing pad having a major surface adjacent the transducer, with the major surface lying in a primary plane. The ABS also includes a sub-ambient pressure cavity disposed upstream of the overcoat layer and being recessed from the primary plane by a cavity depth in the range 0.8 to 2 microns. The overcoat layer includes a trailing air flow dam being recessed from the primary plane by a step depth in the range 0.05 to 0.5 microns. The overcoat layer also includes a corner region recessed from the primary plane by at least the cavity depth. | 10-23-2008 |
20080259500 | Head slider for disk apparatus - A head slider, of a disk apparatus, flying over a rotary magnetic recording disk, having a characteristic less dependent on the atmospheric pressure. The head slider of a disk apparatus comprises: a magnetic element adapted to fly over a magnetic recording medium; a medium opposing surface being formed with, with respect to the direction in which the medium moves, an inflow pad portion at the upstream end and a pair of side rail portions extending downstream from the inflow pad portion, and a center pad at the central part and a pair of side pads on the sides of the center pad and upstream of the center pad at the downstream end of the head slider. The center pad and the side pads are constituted so that a positive pressure generated by the side pads is greater than a positive pressure generated by the center pad. | 10-23-2008 |
20080266715 | Slider overcoat for noise reduction of TMR magnetic transducer - A hard disk drive slider comprises an overcoat layer, which covers an air-bearing surface of the slider. The overcoat covers an exposed surface of a tunneling magnetoresistance transducer. An adhesion layer is coupled with the overcoat layer and the air-bearing surface. The adhesion layer comprises a compound of nitrogen. The compound of nitrogen reduces noise in read data from the tunneling magnetoresistance transducer. | 10-30-2008 |
20080273271 | Reducing the height of a defect associated with an air bearing surface - A method for reducing the height of a defect associated with an air bearing surface of a hard disk drive slider is disclosed. The technology initially ion mills for a first period of time at a first angle relative to an air bearing surface of a disk drive slider to remove a first portion of the air bearing surface. Then the technology ion mills for a second period of time at a second angle relative to an air bearing surface of the disk drive slider to remove a second portion of the air bearing surface. The second portion of the air bearing surface comprises a defect wherein the ion milling at the second angle reduces the height of the defect with respect to the air bearing surface. | 11-06-2008 |
20080304181 | METHOD AND APPARATUS FOR PROVIDING AN AIR BEARING WITH HIGHER FLYING HEIGHT FOR LOWER ROTATING SPEED DRIVES - A method and apparatus for improving flying height stability at lower speeds is achieved by an ABS with a channel and pocket. The channel and pocket are configured to achieve a desired flying height profile. | 12-11-2008 |
20080304182 | HEAD SLIDER AND HARD DISK DRIVE HAVING THE SAME - disk A hard disk drive includes a base member, a disk which is a data storage medium to rotate at a high speed on the base member, and a head stack assembly (HSA) having a head slider including a magnetic head to write data on the disk or to reproduce data recorded on the disc, and an ABS pattern formed on a disk facing surface of the head slider to generate a lifting force, and is rotatably mounted on the base member so that the head slider moves between inner circumferences and outer circumferences of the disk in a floating state over the disc, wherein if a center line of the ABS pattern is an ABS line and a straight line extending in a direction in which an air flow induced due to the high speed rotation of the disk enters the ABS pattern is an air flow line, a crossing angle between the ABS line and the air flow line is reduced as the head slider moves from the outer circumferences to the inner circumferences. | 12-11-2008 |
20090002890 | Spoiler with integrated bypass channel wall for HDD applications - A spoiler implementable in a hard disk drive. The spoiler includes a structure. The structure includes a diffuser integrated therewith. The structure further includes an extension emanating there from, the extension configured to complete a wall of a bypass channel in said hard disk drive, said inner wall having a portion removed there from. | 01-01-2009 |
20090034125 | Load/unload ramp spoiler for a hard disk drive - A load/unload ramp spoiler for a hard disk drive is disclosed. One embodiment provides a load/unload ramp body having at least one load/unload ramp associated therewith, the at least one load/unload ramp for receiving at least one slider coupled with an actuator assembly. In addition, at least one spoiler is integrated with the load/unload ramp body to reduce detrimental local excitation of an airflow encountering the load/unload ramp body. | 02-05-2009 |
20090034126 | Magnetic head having CPP sensor with improved biasing for free magnetic layer - A magnetic head for a hard disk drive having a CPP read head sensor that includes a layered sensor stack including a free magnetic layer and hard bias elements that are disposed on the sides of the free magnetic layer to provide a biasing magnetization for the free magnetic layer. To increase the coercivity of the hard bias elements, and thereby improve the biasing of the magnetization of the free magnetic layer, the ratio (t/H) of the thickness t to the height H of the hard bias elements is fabricated to be within the range of from approximately 1 to approximately 1/15. | 02-05-2009 |
20090052087 | AIR BEARING AT OPPOSITE SIDE OF LINEAR TAPE TO SUPPORT TAPE INTO CONTACT WITH HEAD SLIDER - A tape head and bearing assembly comprises an air bearing structure having a tape bearing surface with a plurality of openings therein configured to provide a continuous air bearing of pressurized air to support a linear tape moving along a path, the air bearing being provided on only one side of the linear tape. A head slider assembly, such as an HDD-type assembly, is positioned at the opposite side of the linear tape from the tape bearing surface and is configured to be in contact with the linear tape. | 02-26-2009 |
20090073612 | MAGNETIC HEAD DEVICE - A magnetic head device includes a slider with a facing side and a magnetic function part. The facing side of the slider includes a front positive pressure surface located close to a leading end of the slider, a rear positive pressure surface located close to a trailing end of the slider, and a pair of side positive pressure surfaces located closer to the trailing end than the front positive pressure surface and disposed at both sides of a longitudinally extending centerline. Air inlet grooves for introducing air into the side positive pressure surfaces are each disposed in front of each side positive pressure surface. Each air inlet groove extends between the front positive pressure surface and a corresponding side face of the slider and opens toward a leading end face of the slider. | 03-19-2009 |
20090109572 | HEAD SLIDER, HEAD GIMBAL ASSEMBLY and STORAGE APPARATUS - A head slider includes a leading end and a trailing end, a main top face and two step faces. The main top face faces a recording medium and forms a part of the leading end. The two step faces extend from the leading end to a downstream side at a lower position than the main top face when the main top face is placed face up. The step faces are respectively provided at the right and left sides with respect to the airflow. The main top face extends between the two step faces. The other portion of the main top face extends at the rear side of the step faces. At least a part of the head slider floats above the recording medium. | 04-30-2009 |
20090122448 | GLASS SUBSTRATE FOR MAGNETIC DISK APPARATUS - A main surface of a glass substrate for a magnetic disk is disk-shaped and has a ski jump on an outer peripheral end portion of the main surface opposing a magnetic head slider to be loaded. A rate of change of angles of tangents to a slope of the ski jump in a radial direction in a range between an inner circumferential side and a transition point on the slope is equal to or less than 10/W μrad/mm where W is a width of the magnetic head slider. | 05-14-2009 |
20090128959 | Self PSA adjustment using thermal adapter on suspension for improving takeoff in hot/wet environment - A suspension arm assembly for a hard disk drive that includes a suspension arm and a thermal adaptor. The thermal adaptor has a thermal coefficient of expansion that is different from the thermal coefficient of expansion of the suspension arm so that a pitch static angle is increased with an increase in temperature. The suspension arm assembly is attached to an actuator arm and coupled to a head of the disk drive. The head may be parked on a landing zone of a disk surface while the disk is stationary. When the disk is spun, an air bearing is formed between the disk surface and the head. If the drive is operating at an elevated temperature the static angle of the suspension arm will increase to increase the slider's pitch angle and air bearing flying height. | 05-21-2009 |
20090135521 | Protective film forming method - To provide a high-quality protection target by forming a protective film that is thin and excellent in corrosion resistance. Provided is a protective film forming method for forming a protective film at least on a surface of a protection target. The method comprises: a base film forming step for forming a base film on the surface of the protection target; and a DLC film forming step for forming a diamond-like carbon film on the base film. The base film forming step forms the base film on the surface of the protection target for a plurality of times by repeating a process of depositing the base film in a prescribed thickness and eliminating a part of or a whole part of the base film. Further, the method comprises, before the DLC film forming step, an insulating layer forming step for forming an insulating layer on the surface of the base film on which the diamond-like carbon film is to be formed. | 05-28-2009 |
20090135522 | FLYING HEAD SLIDER AND MAGNETIC DISK APPARATUS - A pair of side pads, which are arranged to face each other by having a negative pressure generating part in the direction orthogonal to an air flow direction of a slider therebetween, are made to have three or more steps, respectively. Of the respective surfaces having the plural steps, the surfaces having a highest height respectively are not subject to a milling, and the respective surfaces of having plural steps are made to gradually have a deeper cavity depth as the surface comes closer to the air inflow end. Further, it is also effective for improving the efficiency in positive pressure generation to surround the second side pad region partially by the region of the surface being not subject to the milling, and to surround the third side pad region partially by the second surface region. | 05-28-2009 |
20090147404 | Magnetic performance of a magnetic transducer operating within a hard disk drive - A method for improving the magnetic performance of at least one magnetic transducer operating within a hard disk drive. The method comprises flying the magnetic transducer at a distance of separation from a magnetic recording media. The magnetic transducer is coupled with a highly damped air bearing surface and a fly height control device. At least one operating parameter of the hard disk drive is measured. The magnetic transducer is moved with the fly height control device into contact with the magnetic recording media, in accordance with at least one operating parameter of the hard disk drive. The magnetic transducer is operated while the magnetic transducer is in contact with the magnetic recording media, thereby improving the magnetic performance of the magnetic transducer. | 06-11-2009 |
20090161257 | MAGNETIC RECORDING MEDIUM, METHOD OF MANUFACTURING THE SAME, AND MAGNETIC RECORDING APPARATUS - According to one embodiment, a magnetic recording medium includes protruded magnetic patterns formed on a substrate, and a non-magnetic material filled in recesses between the magnetic patterns and made of a multi-element amorphous alloy containing Ni or Cu, and two or more metals selected from the group consisting of Ta, Nb, Ti, Zr, Hf, Cr, Mo and Ag. | 06-25-2009 |
20090195932 | Method and apparatus for an air bearing surface in a hard disk drive using at least one patterned disk surface - Estimating methods and apparatus are disclosed for the patterned flying height of an air bearing surface over a patterned surface from the flying height over a smooth surface minus a flying height delta based upon the patterned surface. A hard disk drive is disclosed including the air bearing surface over a rotating disk surface that at least partly includes a patterned surface. A slider with the air bearing surface is disclosed for use over the patterned disk surface. Also disclosed: a head gimbal assembly including the slider and a head stack assembly coupling through the head gimbal assembly to position the slider. | 08-06-2009 |
20090237841 | MAGNETIC HEAD AND MAGNETIC RECORDING DEVICE - A magnetic head includes a head element recording and reading data on and from a recording medium, a slider having an air bearing surface facing the recording medium, and having the head element forming surface which the head element being present on, and a piezoelectric device attached above the head element forming surface and the head element, and configured to displace a part of the head forming surface in a direction perpendicular to the air bearing surface. | 09-24-2009 |
20090244781 | MAGNETIC HEAD SLIDER AND MAGNETIC DISK DRIVE - A magnetic head slider includes a magnetic head element for reading or writing data from or into a magnetic recording medium. The magnetic head slider flies over the magnetic recording medium by an air flow generated by rotation of the magnetic recording medium. The magnetic head slider includes a slider substrate including a center pad for supporting the magnetic head element, the center pad having a sliding surface opposing the magnetic recording medium and a side surface at a downstream side of the air flow, the slider substrate including a concave portion having a bottom surface recessed from the sliding surface; and an insulating layer covering the side surface of the slider substrate, the insulating layer having an edge surface adjacent to the bottom surface of the concave portion, the edge surface having substantially the same plane with the bottom surface of the concave portion. | 10-01-2009 |
20090262460 | HEAD ASSEMBLY HAVING A SENSING ELEMENT - A head or slider having a sensor element to detect changes in head-media spacing is disclosed. In illustrated embodiments the sensor element includes a piezoelectric sensor layer or similar layer that provides acoustic emission or vibration responsive to changes in head-media spacing. In illustrated embodiments, the sensor element is located proximate to the close point of the head and slider. In embodiments described in the specification, output from the sensor element is utilized to energize a heating element or microactuator to control pole tip protrusion or actuation of transducer elements responsive to changes in head-media spacing. | 10-22-2009 |
20090273859 | FORMING A POLE TIP TOPOGRAPHY - A method of forming a pole tip topography associated with an air bearing surface (ABS) of a hard disk drive slider is disclosed. The method etches an exposed pole tip region of an ABS at a first angle with respect to the ABS to remove an irregularity from the exposed pole tip region and to flatten the exposed pole tip region. The exposed pole tip region lacks a photo-resist layer. The method also includes etching the flattened exposed pole tip region of the ABS at a second angle with respect to the ABS to form a recession with reference to the ABS. | 11-05-2009 |
20090273860 | CONTACT HEAD SLIDER AND STORAGE APPARATUS - A contact surface of a contact head slider is received on a film of a lubricant on a storage medium. The rotation of the storage medium allows the contact surface to slide on the surface of the storage medium. The lubricant adheres to the contact surface. The groove is formed on the rear rail between the contact surface and an air bearing surface. The lubricant on the contact surface is forced to flow into the groove based on so-called meniscus effect. Since the air bearing surface extends at a level lower than that of the contact surface, the air bearing surface is prevented from adhesion of the lubricant. A positive pressure is thus reliably generated at the air bearing surface. The contact head slider is allowed to slide on the surface of the storage medium with a high stability. | 11-05-2009 |
20090284869 | COMPLIANT AIR BEARING SLIDER - A compliant, flexible air bearing slider (ABS) reduces the contact forces between the slider and disk, thereby reducing excessive burnishing and wear and increasing the reliability of the slider. According to an embodiment, an ABS has at least one “compliance-enhancing feature” which reduces the bending mode vibration frequency of the slider. By causing the slider to flex, and bringing the bending mode vibration frequency closer to the pitch 2 eigenmode frequency, coupling of the different vibration modes can be obtained. Thus, the different vibration modes can effectively dampen each other and result in reduced contact forces between the slider and disk. | 11-19-2009 |
20090310258 | HEAD, HEAD SUSPENSION ASSEMBLY, AND DISK DEVICE PROVIDED WITH THE SAME - According to an embodiment, a slider of a head comprises a negative-pressure cavity formed in a facing surface, a leading step portion situated on an inflow side of the negative-pressure cavity, a pair of side portions opposed to each other, a trailing step portion situated on an outflow side of the negative-pressure cavity, a leading pad provided on an end portion of the leading step portion on the negative-pressure cavity side, and a plurality of recesses formed on the inflow side of the leading pad and individually opening in the inflow-side end face. The leading step portion includes a main step portion which is situated beside the inflow side of the leading pad and extends in a second direction, and at least one extended step portion extending transversely to the second direction from the main step portion toward the inflow side and situated between the recesses. | 12-17-2009 |
20100039732 | ABS design for dynamic flying height (DFH) applications - A DFH (Dynamic Flying Height) type slider ABS design has a stable flying height and a DFH efficiency that is uniform across the entire disk surface. These properties are a result of embedding the read/write head and heater in a trapezoidally bridged micro-pad having a very small surface area. The micro-pad is surrounded by a wing-like structure that projects from a central rail in the ABS and the micro pad is connected to an inner edge of that structure by a bridge having a trapezoidal shape. The trapezoidal shape responds effectively to variations in air flow direction and pressure point as the slider moves across the disk surface and, as a result, provides the uniform DFH efficiency. At the same time, the projecting wings and adjacent topology help to direct the airflow around the micro-pad and provide the stable flying height. | 02-18-2010 |
20100046119 | HEAD SLIDER, MAGNETIC HEAD SLIDER AND MAGNETIC STORAGE DEVICE - A head slider includes a base surface extending in a first direction and a second direction orthogonal to the first direction, a pair of side pads that are spaced apart from each other in the second direction on the base surface and have air bearing faces of a predetermined height from the base surface, a pair of rib portions that extend from the side pads to an end of the base surface in the first direction and have faces of a height between the base surface and the air bearing faces, and a joint portion that connects opposing ends of the pair of rib portions in the first direction and has a face of a height between the base surface and the air bearing faces. | 02-25-2010 |
20100067146 | MAGNETIC HEAD SLIDER - A magnetic head slider floats by a flow of air formed by rotation of a magnetic recording medium. The magnetic head slider includes: a slider body arranged that faces a surface of the magnetic recording medium and that floats by the flow of air; an insulating layer that is provided at an end of the slider body at an outflow side of the flow of air and that includes a magnetic head element; and a projection shape part arranged at an end of the insulating layer at an outflow side of the flow of air for preventing deposition of a lubricating material deposited on the surface of the magnetic recording medium onto the magnetic head slider. | 03-18-2010 |
20100073821 | MAGNETIC DISK APPARATUS - A magnetic disk apparatus includes a magnetic disk, a spindle motor for rotation of the magnetic disk, and a slider formed with a magnetic head for information reading or writing with respect to the magnetic disk. The slider is arranged to float above the surface of the magnetic disk when the disk is rotating. The magnetic disk apparatus also includes a swing arm for supporting and moving the slider above the magnetic disk, and a ramp disposed adjacent to the outer circumference of the magnetic disk for holding the slider at a withdrawal position which is spaced away from the surface of the magnetic disk. For an information leakage prevention, a hitting mechanism is provided, which is arranged to hit the slider held at the withdrawal position. | 03-25-2010 |
20100091405 | SLIDER WITH AN AIR BEARING SURFACE AND RELATED TOPOGRAPHY - A slider for use with disk drive data storage devices includes a topography that defines features of the slider. The features facilitate in controlling fly-height and/or inhibiting lubricant accumulation on the slider. For example, a trailing air bearing surface of the slider may be formed around a multi-stepped channel that adjusts the fly-height. Further, a shallow shelf behind an air bearing surface and/or curved edges of the features to alter stagnation may contribute to at least inhibiting lubricant collection on the slider. | 04-15-2010 |
20100091406 | SLIDER WITH POCKETS IN FRONT OF AIR BEARING SURFACE - A slider for use with disk drive data storage devices includes a topography that defines features of the slider. The features facilitate in controlling peak pressure, providing stiffness, and/or inhibiting lubricant accumulation on the slider. For example, the features include an air bearing surface and a cavity disposed in front of the air bearing surface. The cavity is closed on all sides by sidewalls. | 04-15-2010 |
20100091407 | PERPENDICULAR WRITE HEAD HAVING A STEPPED FLARE STRUCTURE AND METHOD OF MANUFACTURE THEREOF - A magnetic write head for data recording having a magnetic write pole with a stepped magnetic shell structure that defines a secondary flare point. The secondary flare point defined by the magnetic shell portion can be more tightly controlled with respect to its distance from the air bearing surface (ABS) of the write head than can a traditional flare point that is photolithographically on the main pole structure. This allows the effective flare point of the write head to be moved much closer to the ABS than would otherwise be possible using currently available tooling and photolithography techniques. The write head also includes a non-magnetic spacer layer formed over the magnetic shell structure that is recessed from the ABS by a distance that is greater than that of the magnetic shell portion. A magnetic shield is formed over the magnetic shell and non-magnetic spacer. | 04-15-2010 |
20100097721 | SYSTEM FOR CONTROLLING CONTACT LOCATION DURING TFC TOUCHDOWN AND METHODS THEREOF - A system according to one embodiment includes a thin film stack having a magnetic transducer and a contact pad; and a heater in the thin film stack for inducing thermal protrusion of a media-facing side of the thin film stack, wherein the thin film stack is characterized by the contact pad protruding farther than the magnetic transducer upon the thin film stack being heated by the heater. A method for calibrating a protrusion of a magnetic head includes increasing a thermal protrusion of a magnetic head to induce head-medium contact; determining that the head has contacted the medium, wherein a portion of the head that contacts the medium is a contact pad or overcoat of the contact pad; determining parameters for inducing a desired amount of protrusion based in part on the determination that the head has contacted the medium; and storing the parameters. | 04-22-2010 |
20100142092 | ACTIVE COMPENSATION OF FLYING HEIGHT IN MAGNETIC DISK DRIVES - Magnetic disk drives and associated methods are described for performing an active flying height compensation process for a slider of a magnetic disk drive. For the flying height compensation process, a control system in the disk drive detects a reduction in flying height of a slider in the disk drive. The control system then calculates a compensation heating power to apply to one or more heating elements that are fabricated in the slider to compensate for the reduction in flying height. The control system then applies the compensation heating power to the heating element(s) in the slider to alter the ABS (i.e., generate a protrusion) and increase the flying height of the slider. | 06-10-2010 |
20100142093 | STORAGE DEVICE AND METHOD OF CALCULATING TRANSFER AMOUNT OF LUBRICANT - According to one embodiment, a storage device includes a storage medium and a head slider. The storage medium includes a surface coated with a lubricant. The head slider includes a medium facing surface that faces a surface of the storage medium based on the relative movement to the storage medium. The product ph [atm·nm] of air pressure p [atm] defined between the surface of the storage medium and the medium facing surface and a floating amount h [nm] of the medium facing surface defined from the surface of the storage medium satisfies | 06-10-2010 |
20100142094 | MAGNETIC HEAD SLIDER AND MAGNETIC DISK DEVICE - According to one embodiment, a magnetic head slider includes: a magnetic head; a slider main body configured to be provided with the magnetic head; a first protrusion portion configured to be provided on the slider main body so as to abut the magnetic head; a second protrusion portion configured to be provided on a top surface of the first protrusion portion; and a cutout portion configured to be provided to an edge portion on the top surface of the second protrusion portion, the edge portion being on a side of the top surface. | 06-10-2010 |
20100157480 | HEAD SLIDER AND STORAGE DEVICE - According to one embodiment, a head slider includes a center pad, a pair of center rails, and a center rail connection wall. The center pad is located in the center on the air outflow end side. The center rails extend toward the air inflow end side continuously from the center pad. The center rail connection wall connects the ends of the center rails on the air inflow end side to surround a space between the center pad and the center rails, and has a height between the top surface and the bottom surface of a floating surface. | 06-24-2010 |
20100214696 | Layered structure having FePt system magnetic layer and magnetoresistive effect element using the same - A layered structure includes an amorphous Ta layer, a metallic oxide layer formed from zinc oxide (ZnO) or magnesium oxide (MgO) on the Ta layer, and a FePt magnetic layer formed on the metallic oxide layer. Therefore, an L1 | 08-26-2010 |
20100238592 | HEAD SLIDER AND MAGNETIC STORAGE DEVICE - According to one embodiment, a head slider includes a magnetic head, a medium facing surface, a flow-in end surface, a flow-out end surface, side surfaces, and an absorbing structure. The magnetic head reads and writes information with respect to a magnetic recording medium. The medium facing surface faces the magnetic recording medium. From the flow-in end surface, an airflow generated by rotation of the magnetic recording medium flows in. To the flow-out end surface, the airflow is guided from the flow-in end surface through the medium facing surface. The side surfaces are located on both sides of the medium facing surface. The absorbing structure is provided to at least one of the flow-out end surface and the side surfaces. The absorbing structure absorbs flowing substances guided with the airflow. | 09-23-2010 |
20100246066 | HEAD SLIDER, STORAGE DEVICE, AND METHOD OF MANUFACTURING HEAD SLIDER - According to one embodiment, a head slider includes an element unit formed by lamination on a substrate, a cut surface formed by cutting the substrate, an air-bearing surface configured to face a recording medium when in flight, a protective layer configured to protect at least the air-bearing surface of the element unit, and a coating layer configured to cover at least the cut surface exclusive of the air-bearing surface of the element unit. An outermost surface of the air-bearing surface is formed of the protective layer in the element unit at the least. | 09-30-2010 |
20100302684 | ASYMMETRICAL AIR BEARING SURFACE FOR A HEAD SLIDER IN HARD DISK DRIVES - A method and apparatus for a head slider air bearing surface (ABS) in hard disk drives that mitigate fly height deviations. The invention mitigates these problems by providing an ABS of the head slider with elongated asymmetrical features that extend substantially parallel to the direction of the airflow caused by the rotating magnetic disk, in one or both of the inner diameter (ID) and outer diameter (OD) positions of the head slider with respect to the magnetic disk. The head slider may be produced with a two step etch process, as opposed to a three step etch process. By reducing the number of etching steps, the head slider of the invention can be produced at lower costs and in less time as fewer masks and chamber pump-down steps are required. | 12-02-2010 |
20100309586 | SLIDER AIR BEARING FOR DISK DRIVES - A slider designed to reduce fly height sigma in a plurality of fly media is provided. The slider includes an air bearing surface, a front shallow step pad and a rear shallow step pad that are at a first level deeper than the air bearing surface. The slider further includes a first rear side pocket that is at a second level deeper than the air bearing surface, the first side pocket substantially polygon shaped and a second rear non-symmetrical side pocket non-symmetrical with the first rear side pocket that is at the second level deeper than the air bearing surface, the second side pockets substantially polygon shaped wherein the second rear non-symmetrical side pocket comprises a larger volume than the first rear side pocket. | 12-09-2010 |
20100321831 | WRITE POLE FABRICATED USING A CARBON HARD MASK AND METHOD OF MAKING - A magnetic writer comprises a write pole, a substrate and a non-magnetic, oxygen-free buffer material. The write pole has a leading edge, a trailing edge, a first side and second side. The substrate is at the leading edge of the write pole. The non-magnetic, oxygen-free buffer material is located between the write pole and the substrate. | 12-23-2010 |
20110007422 | Protected Transducer for Dead Layer Reduction - A transducer includes magnetic material formed on a substrate that is shaped to include a trailing edge, a leading edge and a pair of opposing sidewalls extending between the trailing edge and the leading edge. A layer of protective material is positioned in contact with each of the pair of sidewalls of the shaped magnetic material. Backfill material surrounds the protective material on each of the pair of sidewalls of the shaped magnetic material. | 01-13-2011 |
20110013317 | METHOD AND SYSTEM FOR FABRICATING MAGNETIC TRANSDUCERS WITH IMPROVED PINNING - A method and system for providing a magnetic transducer are disclosed. The method and system include providing a magnetic element that includes a free layer, a pinned layer, and a nonmagnetic spacer layer between the free layer and the pinned layer. The nonmagnetic spacer layer is a tunneling barrier layer. The free layer is configured to be biased in a first direction. The pinned layer has a pinned layer magnetization configured to be pinned in a second direction that is at a first angle from perpendicular to the ABS. The first angle is nonzero and different from ninety degrees. The second direction and the first direction form a second angle that is different from ninety degrees. | 01-20-2011 |
20110063757 | SLIDER PAD FOR CONTACT MITIGATION - An apparatus and associated method for a slider pad that allows for contact to be mitigated without plastic deformation. Various embodiments of the present invention are generally directed to a slider that presents a transducer and has at least one air bearing surface (ABS) feature. The ABS feature comprises a pair of sidewalls spaced a distance X apart. A pad is deposited on the ABS feature so that the pad comprises a hemispherical cross-section and has a circumferential diameter greater than X. | 03-17-2011 |
20110075299 | MAGNETIC WRITE HEADS FOR HARD DISK DRIVES AND METHOD OF FORMING SAME - Embodiments provide a write pole and a magnetic shield for write heads. The write pole includes a trailing step, while the magnetic shield includes a slanted bump. The slanted bump and the trailing step provides maximize magnetic flux for writing to a magnetic media such as a magnetic storage disk in a hard disk drive, while avoiding saturation. One embodiment of a method for forming the write pole includes depositing non-magnetic gap material on the write pole and trailing step. An ion beam milling process is used to form a taper in the non-magnetic gap material. The magnetic shield is then deposited on the taper, forming the slanted bump of the shield. | 03-31-2011 |
20110141622 | HEAD SLIDER WITH A POCKET FOR SUPPRESSING VARIABILITY IN LEVITATION - A head slider with a pocket. An air bearing surface. A central levitating surface. A magnetic recording head provided in proximity to a trailing edge side of the central levitating surface. A deep recessed surface provided on both sides of the head slider in a width direction of the head slider with respect to the central levitating surface, wherein the deep recessed surface is configured to generate negative air pressure. A second deep recessed surface extending from a leading edge side of the central levitating surface. A levitating surface provided on a leading edge side of the deep recessed surface and a second levitating surface provided between the deep recessed surface and the second deep recessed surface, wherein the pocket is provided whose depth from the levitating surface and the second levitating surface is deeper than a periphery immediately in front of a terminus of the second deep recessed surface. | 06-16-2011 |
20110157748 | HEAD AND DISK DRIVE WITH SAME - According to one embodiment, a facing surface of a slider of a head includes a leading step on an inflow side of the slider, a leading pad on the leading step, a pair of side steps extending in a first direction from the leading step toward an outflow end of the slider and opposed to each other across a space in a second direction, side pads provided on the side steps to be continuous with the side pads, individually, a trailing step located on an outflow side of the airflow and provided with a head section, and induction grooves continuously extending from the leading pad to the side pads, individually, and configured to guide introduced airflow. | 06-30-2011 |
20120087042 | Perpendicular magnetic recording head laminated with AFM-FM phase change material - A PMR writer is disclosed that minimizes pole erasure during non-writing and maximize write field during writing through an AFM-FM phase change material that is in an antiferromagnetic (AFM) state during non-writing and switches to a ferromagnetic (FM) state by heating during writing. The main pole layer including the write pole may be comprised of a laminated structure having a plurality of “n” ferromagnetic layers and “n−1” AFM-FM phase change material layers arranged in an alternating manner. The AFM-FM phase change material is preferably a FeRh, FeRhPt, FeRhPd, or FeRhIr and may also be used as a flux gate to prevent yoke flux from leaking into the write pole tip. Heating for the AFM to FM transition is provided by write coils and/or a coil located near the AFM-FM phase change material to enable faster transition times. | 04-12-2012 |
20120099224 | SLIDER FOR A HEAD GIMBAL ASSEMBLY WITH AN INVERTED DIMPLE - Apparatus and method for forming a head gimbal assembly (HGA). In accordance with various embodiments, a slider is formed with opposing first and second side surfaces, an air bearing feature on said first side surface and a dimple extending from said second side surface adapted to facilitate multi-axial rotation of the slider. | 04-26-2012 |
20120120527 | Asperity and Head-Media Contact Detection Using Multi-Stage Temperature Coefficient of Resistance Sensor - A multi-stage sensor is situated on the head transducer and configured to interact with a magnetic recording medium. A first sensor stage of the multi-stage sensor has a temperature coefficient of resistance. A second sensor stage of the multi-stage sensor is coupled to the first sensor and has a temperature coefficient of resistance. The first sensor stage is configured to preferentially sense asperities of the media relative to the second sensor stage, and the second sensor stage configured to preferentially sense proximity to, and contact with, a surface of the media relative to the first sensor stage. The first and second sensor stages may be connected in series or in parallel. | 05-17-2012 |
20120154953 | HEAD WITH ALTITUDE RESISTANT AIR-BEARING SURFACE - Approaches for a head slider for use within a hard-disk drive. The head slider comprises an air bearing surface (ABS) and an electromagnetic transducer disposed at an air outflow end of the air bearing surface. The air bearing surface comprises a slit feature that is present prior to the electromagnetic transducer in the direction of air flow. The physical dimensions of the slit feature are designed to lower an amount of pressure required for a protrusion of the head slider to detect a surface of a magnetic-recording disk. The air bearing surface may further comprise an optional hollow recess prior to the slit feature in the direction of air flow. The size and the shape of the hollow recess are designed to decrease a change in a fly height of the head slider in response to a change in altitude of the hard-disk drive. | 06-21-2012 |
20120236437 | WRITE POLE FABRICATED USING A CARBON HARD MASK AND METHOD OF MAKING - A magnetic writer comprises a write pole, a substrate and a non-magnetic, oxygen-free buffer material. The write pole has a leading edge, a trailing edge, a first side and second side. The substrate is at the leading edge of the write pole. The non-magnetic, oxygen-free buffer material is located between the write pole and the substrate, and the oxygen-free buffer material is selected from Re, Ru, Os, Rh, Ir, and combinations thereof. | 09-20-2012 |
20120250189 | MAGNETIC HEAD INCLUDING SIDE SHIELD LAYERS ON BOTH SIDES OF A MR ELEMENT - A magnetic head that reads information of a magnetic recording medium is provided. The magnetic head according to one embodiment includes: an MR element, formed with multilayer films, of which an electrical resistance changes according to an external magnetic field; a first shield layer that is disposed on a lower side in an lamination direction of the MR element; a second shield layer that is disposed on an upper side in the lamination direction of the MR element, and that applies voltage to the MR element together with the first shield layer; and side shield layers that are disposed on both sides of the MR element in a truck width direction. The side shield layers include soft magnetic layers and hard magnetic layers magnetized in a predetermined direction. | 10-04-2012 |
20130010390 | THIN FILM MAGNETIC HEAD, THIN FILM MAGNETIC HEAD DEVICE, MAGNETIC RECORDING/REPRODUCING APPARATUS, AND METHOD FOR MANUFACTURING THIN FILM MAGNETIC HEAD - A thin-film magnetic head includes a slider substrate and a write element. The slider substrate has an air bearing surface at one side thereof. The write element has a recording magnetic pole film. The recording magnetic pole film is disposed on a plane crossing the air bearing surface over the slider substrate and has a large-width portion and a small-width portion continuously arranged in the named order toward the air bearing surface. The small-width portion has a smaller width than the large-width portion. Of the large-width portion and the small-width portion, at least the small-width portion has a first portion and a second portion. The second portion is continuous with an upper end of the first portion and has both side faces inclined in such a direction as to increase the width. An external angle of the first portion formed by a plane parallel to a bottom face and the side face is larger than an external angle of the second portion formed by a plane parallel to the bottom face and the side face. | 01-10-2013 |
20130010391 | THERMAL FLYING HEIGHT CONTROL SLIDER WITH SLIT IN HARD DISK DRIVER - A slider includes a void for controlling the flying height of the slider over a disk in a HDD. The slider comprises a slider body having a leading surface and a trailing surface. A read/write element is formed in a portion of the slider body proximate to the trailing surface of the slider body and a first thermal heater proximate the read/write element, wherein a first void is defined within the slider body proximate to the read/write element for increasing a mobility of the read/write element to increase the protrusion when thermal energy is introduced to the read/write element. | 01-10-2013 |
20130027812 | Magnetic Sensor With Anisotropic Liner - An apparatus and associated method are generally directed to a magnetic senor constructed with an anisotropic liner capable of screening magnetic flux. Various embodiments can have a data read element positioned on an air bearing surface adjacent a magnetic shield which is at least partially lined with an in-plane anisotropy layer. | 01-31-2013 |
20130027813 | Shaped Shield For A Magnetoresistive Head - A magnetic shield that is capable of enhancing magnetic reading, such as in use as a data transducing head. A magnetic stack can have a read element with an air bearing surface (ABS). The read element may be positioned adjacent a shield layer with a continuously curvilinear sidewall and a shield feature may be positioned within the areal extent of the continuously curvilinear sidewall. | 01-31-2013 |
20130070371 | SILVER ALLOY ELECTRICAL LAPPING GUIDES (ELGs) FOR FABRICATION OF DISK DRIVE SLIDERS WITH MAGNETORESISTIVE SENSORS - An electrical lapping guide (ELG) for the fabrication of an air-bearing slider used in a magnetic recording disk drive is formed of a different material than the magnetoresistive (MR) read head or sensor so as to have both a high electrical resistivity and a substantially higher etch rate. When the ELG and MR sensor are etched simultaneously to form their respective back edges, the ELG will have a sharp well-defined non-tapered wall at the back edge. The ELG has a film thickness close to but generally thinner than that of the MR sensor, and a sheet resistance to generally match the resistance measurement capability of the lapping tool. The preferred material for the ELG is an alloy comprising silver (Ag) and one or more of Sn, Ge and zinc Zn. | 03-21-2013 |
20130083432 | MAGNETIC BIAS STRUCTURE FOR MAGNETORESISTIVE SENSOR - A magnetic read head having a hard bias structure that both optimizes magnetic bias field and also ensures manufacturability while maintaining sensor stripe height integrity. The read head includes a sensor stack having a back edge and first and second laterally opposed sides. A hard bias structure extending from each of the first and second sides of the sensor stack has a neck portion located near the sensor and having a back edge that is aligned with and parallel to the back edge of the sensor stack. The hard bias structure also includes a flared portion having a back edge that defines an angle relative to the air bearing surface of the read head. The back edge preferably defines and angle of 45-75 degrees relative to the air bearing surface. | 04-04-2013 |
20130163121 | MAGNETIC SENSOR HAVING HARD BIAS STRUCTURE FOR OPTIMIZED HARD BIAS FIELD AND HARD BIAS COERCIVITY - A magnetic read sensor having a hard bias structure that extends beyond the back edge of the sensor stack by a controlled, distance that is chosen to maximize both hard bias field and hard bias magnetic coercivity and anisotropy. The hard bias structure has a back edge that is well defined and that has a square corner at its innermost end adjacent to the sensor stack. The magnetic sensor can be constructed by a process that includes a separate making an milling process that is dedicated to defining the back edge of the hard bias structure. | 06-27-2013 |
20130163122 | MAGNETIC HEAD HAVING HIGH-FREQUENCY OSCILLATORY ELEMENTS AND DISK DRIVE WITH THE SAME - According to one embodiment, a magnetic head includes a main pole configured to apply a perpendicular recording magnetic field to a recording layer of a recording medium, a return pole opposed to the trailing side of the main pole with a write gap therebetween and configured to reflux magnetic flux from the main pole to form a magnetic circuit in conjunction with the main pole, a coil configured to excite magnetic flux in the magnetic circuit includes the main pole and the return pole, a plurality of high-frequency oscillatory elements individually interposed between the main pole and the return pole, includes a plurality of magnetic films different in magnetic resonance frequency, and configured to individually apply high-frequency magnetic fields to the recording medium, and an electrical circuit configured to energize the high-frequency oscillatory elements. | 06-27-2013 |
20130176643 | DISTRIBUTED TEMPERATURE DETECTOR ARCHITECTURE FOR HEAD DISK INTERFACE SYSTEMS - Approaches for a distributed temperature detector architecture in a head disk interface system of a hard-disk drive (HDD). A HDD may include a read/write head comprising a read element and a write element and a read/write integrated circuit (IC). The read/write head may comprise (a) a first temperature sensor that is located relatively near an air bearing surface (ABS) of the read/write head and (b) a second temperature sensor that is offset from the ABS. The read/write IC is configured to detect when the read/write head makes physical contact with a disk based on a difference in temperature measured by the first and second temperature sensor. The first and second temperature sensors form a bridge circuit, such as a Wheatstone bridge, with a first IC resistor and a second IC resistor that both reside in the read/write IC, allowing the temperature of the read/write head to be accurately measured. | 07-11-2013 |
20130321955 | Low-Recess Write Pole Coil Near Shield at Media-Facing Surface - An apparatus includes a write pole magnetically coupled to write coils that generate a first magnetic field during a switching event. The apparatus includes a shield at a media-facing surface and proximate the write pole. A conductive element is disposed proximate the shield and configured to generate a second magnetic field opposite to the first magnetic field during the switching event. A selected one of the write coils is located adjacent the shield separate from others of the write coils. | 12-05-2013 |
20140002930 | MAGNETIC ELEMENT WITH BIASED SIDE SHIELD LAMINATION | 01-02-2014 |
20140022672 | DEVICES AND METHODS FOR REDUCING LUBRICANT ACCUMULATION ON SLIDERS - In certain embodiments, a slider includes an air bearing surface having a cavity. The cavity includes transition features at an upstream side of the cavity to mitigate air flow expansion along the cavity. Turbulence-inducing features are positioned on the transition features. | 01-23-2014 |
20140022673 | WRITE HEAD WITH MODIFIED SIDE SHIELDS - A write head, the write head having an air bearing surface, the write head including a magnetic write pole, wherein at the air bearing surface, the write pole has a trailing surface, a leading surface that is opposite the trailing surface, and first and second surfaces; a trailing shield proximate the trailing surface of the magnetic write pole; first and second gaps proximate the first and second surfaces of the magnetic write pole; first and second side shields proximate the first and second gaps, each of the first and second side shields having a trailing shield surface; and first and second antiferromagnetic-coupling layers positioned between the trailing shield surfaces of the first and second side shields and the trailing shield. | 01-23-2014 |
20140029139 | READ/WRITE HEAD WITH ADJUSTABLE FLY HEIGHT - A transducing device may include features for adjusting the fly height between the transducing device and a magnetic storage medium. In one example, the transducing device includes a transducing element, at least one heating element, a permanently deformable material portion, and a temporarily deformable material portion. In this example, the permanently deformable material portion is configured to permanently deform in response to heat from the at least one heating element, and the temporarily deformable material portion is configured to temporarily deform in response to heat from the at least one heating element. The fly height of the device may be adjusted using lower temperatures and less energy than some other types of devices. | 01-30-2014 |
20140111886 | Graded Bevel Tapered Write Pole Design for Field Enhancement - A structure and a process for a perpendicular write pole that provides increased magnetic flux at the ABS is disclosed. This is accomplished by increasing the amount of write flux that originates above the write gap, without changing the pole taper at the ABS. Three embodiment of the invention are discussed. | 04-24-2014 |
20140153137 | Magnetic Element with Coupled Side Shield - A magnetic element may be constructed in accordance with various embodiments as a data reader. The magnetic element can have at least a magnetic reader that contacts a top shield and is separated from a side shield on an air bearing surface (ABS). The side shield may be antiferromagnetically coupled to the top shield via a coupling layer disposed between the top and side shields. | 06-05-2014 |
20140168818 | READ SENSOR FOR RECORDING HEAD - Implementations described and claimed herein provide a read sensor structure having a synthetic anti-ferromagnetic (SAF) structure with a pinning that is canted with respect to an air bearing surface (ABS) of the read sensor. In an implementation of the read sensor, the angle between the pinning direction of a reference layer (RL) and the pinning direction of a free layer (FL) is obtuse. | 06-19-2014 |
20140168819 | HARD DISK HAVING A SQUEEZE AIR BEARING FOR ROTATING A DISK - Approaches to use of a squeeze air bearing for supporting and/or rotating the disks in a hard-disk drive. The squeeze bearing, whose effect is based on relative normal motion between two surfaces, is arranged adjacent to the rim of the disk to provide a bearing force at the disk rim. The squeeze bearing comprises multiple cantilevered arms with one end fixed to a support ring assembly and the other end having one or more vibrational element which, when vibrating, provides the bearing force. At least one of the vibrational elements is configured at an angle to the disk rim and which, when vibrating, provides a tangential force to rotate the disk for HDD operational purposes. Therefore, such a squeeze bearing provides an integrated solution for bearing and rotating the disk(s) of an HDD, thereby eliminating the need for a liquid-based disk spindle motor system. | 06-19-2014 |
20140218825 | SIDE SHIELD PEDESTAL FOR DATA READERS - Various embodiments may be generally directed to a magnetic element capable of reading magnetic data bits. Such a magnetic element may have at least a magnetic stack laterally adjacent a side shield and non-magnetic pedestal on an air bearing surface (ABS). The non-magnetic pedestal can be configured to have a greater stripe height from the ABS than the side shield. | 08-07-2014 |
20140233134 | Two Dimensional Magnetic Sensor Immune to Skew Angle Misalignment - Apparatus for two dimensional data reading. In accordance with some embodiments, a magnetic read element has a plurality of read sensors positioned symmetrically about a pivot point with at least two of the read sensors configured to concurrently read two dimensional user data while being immune to skew angle misalignment. | 08-21-2014 |
20140268421 | MAGNETIC SENSOR WITH DIFFERING STRIPE HEIGHTS - A magnetic sensor may be generally configured in accordance with various embodiments to have a magnetically responsive stack with first and second free layers and without a fixed magnetization. The first and second free layers can be tuned to have different stripe heights from an air bearing surface (ABS) and square rear surface features distal the ABS. | 09-18-2014 |
20140268422 | Data Reader Side Shields with Polish Stop - A data reader and associated method of making are generally provided. A data reader capable of sensing adjacent data bits may be configured at least with a magnetic stack disposed between first and second side shields. Each side shield may have a polish stop layer that is tuned to provide a first predetermined polish rate. | 09-18-2014 |
20140268423 | Dual-Piece Heat Sink Layer for Robust Reader in Magnetic Recording Head - A read head structure is disclosed with a dual piece heat sink layer having a front piece formed over a front portion of a dynamic flying height (DFH) element and a back piece above a back portion of the DFH element. A first (S1) shield is formed on the front piece and between the front piece and air bearing surface (ABS). Front and back pieces are separated by an insulator gap. The front piece is used to help control read gap protrusion. As a result, a bottom portion of the S1 shield protrudes to a greater extent than a top portion adjacent to the sensor thereby protecting the sensor from unwanted contact with the magnetic media. The dual piece heat sink layer also enables an improved Figure of Merit in terms of temperature rise in the reader per unit of actuation (nm) delivered by the DFH element. | 09-18-2014 |
20140268424 | MANUFACTURING METHOD OF MAGNET HEAD ABLE TO REDUCE ELECTRODE FILM FOR PLATING - Method for manufacturing a magnetic head includes providing a stopper layer on an upper surface of a main magnetic pole layer applying a magnetic flux to a recording medium via a first insulation layer, providing a second insulation layer on the upper surface of the first insulation layer to cover at least an entire surface of the stopper layer, covering an upper surface portion of the second insulation layer with a mask layer, forming a height difference portion by removing at least a first insulation layer portion not covered by the mask layer by etching to at least partially remove at least a stopper layer portion in a film thickness direction, and subsequently by removing the mask layer, forming a electrode film in the height difference portion, and forming a plating film, which is a magnetic shield for the main magnetic pole layer, on an upper surface of the electrode. | 09-18-2014 |
20140300995 | Data Writer with Yoke Shaped Write Pole - A magnetic element can be configured as a data writer with at least a write pole contacting a yoke and having an air bearing surface. The write pole may be shaped to match a paddle surface of the yoke that extends perpendicular to the air bearing surface and facing parallel to the air bearing surface. | 10-09-2014 |
20140327988 | DATA READER WITH BACK EDGE SURFACE - A data reader can be configured with at least a magnetically responsive lamination that has a first portion with a first stripe height from an air bearing surface (ABS) and a second portion with a different second stripe height from the ABS. The first portion can be constructed to have a back edge surface shaped at a predetermined angle relative to the ABS by a back edge feature. | 11-06-2014 |
20140327989 | Side Shield Biasing Layer Separated from an Air Bearing Surface - Various embodiments may configure a data storage device with at least a magnetic element having a magnetic stack that is configured with an air bearing surface (ABS) and is separated from a side shield. The side shield can be biased by a biasing layer that contacts the side shield and is separated from the ABS. | 11-06-2014 |
20140340792 | Magnetic Element with Biasing Structure Distal the Air Bearing Surface - An apparatus can be generally directed to a magnetic stack having a magnetically free layer positioned on an air bearing surface (ABS). The magnetically free layer can be biased to a predetermined magnetization in various embodiments by a biasing structure that is coupled with the magnetically free layer and positioned distal the ABS. | 11-20-2014 |
20140376131 | Data Writer with Tapered Side Shield Sidewalls - A data writer may be generally configured at least with a write pole that has a pole sidewall and a continuous first taper angle connecting leading and trailing edges. The write pole can be positioned adjacent to a side shield that is configured with first and second shield sidewalls tapered to a shield tip that is the closest point between the write pole and side shield. | 12-25-2014 |
20150029615 | Magnetic Write Head Having A Recessed High Moment Portion Of The Wrap-Around Shield - Approaches to improving hard disk drive far track interference problems include utilizing a wrap-around shield having recessed high magnetic moment layer(s). Embodiments include tapering the high-moment portion away from the air bearing surface (ABS) in the cross-track direction away from the write pole, thereby reducing exposure of high moment layers at the ABS to reduce the risk of unwanted track erasure away from the main pole. Embodiments include positioning the high magnetic moment layers in their entirety away from the ABS, such as with a laminate structure of high magnetic moment and low magnetic moment materials laid down in a direction away from the pole tip trailing edge. | 01-29-2015 |
20150036244 | SYSTEM AND METHOD OF FORMING SPACER STRUCTURES USING ULTRA NARROW MAGNETIC HEAD FABRICATION - A magnetic head, according to one embodiment, includes a sensor structure extending from an air bearing surface end thereof in a stripe height direction, the sensor structure having sidewalls on opposite sides thereof, the sidewalls extending between a top and a bottom of the sensor structure, the sidewalls extending in the stripe height direction, wherein a spacing between the sidewalls in a track width direction along the top of the sensor structure is about constant therealong in the stripe height direction. | 02-05-2015 |
20150036245 | MAGNETORESISTIVE SENSOR - An apparatus disclosed herein comprises a magnetically free layer and a bottom shield, wherein a first portion of the bottom shield substantially adjacent the free layer is pinned perpendicular to an air-bearing surface (ABS) of the apparatus and a second portion of the bottom shield not substantially adjacent the free layer is pinned parallel to the ABS of the apparatus. | 02-05-2015 |
20150055251 | READER STRUCTURE - An apparatus disclosed herein includes a sensor with a free layer having cross-track easy axis anisotropy. | 02-26-2015 |
20150062753 | STIFF DISCRETE INSERT ARRAY FOR THERMAL PTR MANAGEMENT WITH DESIRED INDUCED STRESS STATE THAT REDUCES TENDENCY FOR WRITE POLE ERASURE - Embodiments of the present invention generally relate to a magnetic device having a discontinuous array of columns disposed near a magnetic pole. Each column has a length extending perpendicular to an air bearing surface and a width. The length is greater than the width. | 03-05-2015 |
20150062754 | WRITER CORE INCORPORATING THERMAL SENSOR HAVING A TEMPERATURE COEFFICIENT OF RESISTANCE - A writer core of a transducer is configured to interact with a magnetic recording medium and comprises an upper core and a lower core. At least one of the upper and lower cores comprises a return pole having a return shield. The apparatus also comprises a writer pole between the upper and lower cores, and a writer gap defined between the writer pole and the return shield. The apparatus further comprises a sensor element within one of the upper and lower cores that includes the writer gap. The sensor element has a temperature coefficient of resistance and is configured to sense for a change in temperature indicative of one or both of a change in spacing and contact between the transducer and the magnetic recording medium. | 03-05-2015 |
20150062755 | DUAL READER STRUCTURE - Implementations described and claimed herein provide a dual reader wherein a bottom shield is attached to side shields. | 03-05-2015 |
20150062756 | READER STRUCTURE - An apparatus disclosed herein comprises a reader structure having a sensor stack and a bottom shield having a first end and a second end on opposite sides of the bottom shield in a cross-track direction, wherein the first end is formed by intersection of arcs. | 03-05-2015 |
20150062757 | Magnetic Stack with Different Areal Extents on an Air Bearing Surface - A data reader may be configured at least with a magnetic stack that has a first magnetic layer separated from a second magnetic layer by a non-magnetic spacer layer. The first magnetic layer may have an areal extent on an air bearing surface (ABS) that differs from the second magnetic layer while the second magnetic layer can be configured with a first plurality of linear sidewalls that are each angled with respect to a second plurality of linear sidewalls of the first magnetic layer. | 03-05-2015 |
20150070799 | Depolarizing Layer in a Magnetic Stack - A data reader may be configured at least with a magnetic stack positioned on an air bearing surface (ABS) and contacting a spin depolarizing layer that is a minority spin current carrier. The spin depolarizing layer can have a thickness and spin diffusion length corresponding to a net zero spin polarization at an interface of the magnetic stack and spin depolarizing layer. | 03-12-2015 |
20150070800 | Injector Stack with Diffusive Layer - A data reader may be configured at least with detector and injector stacks that each has a common spin accumulation layer. The detector stack may positioned on an air bearing surface (ABS) while the injector stack is positioned distal the ABS. The injector stack can have a diffusive layer with a larger spin diffusion length than mean free path. | 03-12-2015 |
20150077882 | READER STRUCTURE - Implementations described and claimed herein provide a synthetic antiferromagnetic (SAF) layer with canted pinning, wherein a down-track direction facing surface of the SAF layer has edges that are substantially parallel to pinning direction of the SAF layer. | 03-19-2015 |
20150085402 | VARYING DATA WRITER SIDE SHIELD GAP DISTAL THE ABS - A data writing element may be configured at least with a write pole positioned adjacent a first shield along a first axis and adjacent a second shield along a second axis. The second shield may be separated from the write pole by a first gap distance on an air bearing surface (ABS) and by a second gap distance distal the ABS with the first and second gap distances meeting at a transition surface oriented parallel to the ABS. | 03-26-2015 |
20150098153 | GIANT MAGNETO RESISTIVE SENSOR AND METHOD FOR MAKING SAME - A disk drive includes a disk including a magnetizable layer of material, and a transducer. The transducer has a read element that includes a first shield layer, a pinned layer, a metallic spacer, an AP (anti-parallel) free layer, and a second shield layer. The pinned layer has a surface area which is greater than the area of the AP free layer. The read element also includes an anti-ferromagnetic layer for substantially fixing the magnetic orientation of a plurality of domains in the pinned layer. The ferromagnetic layer is adjacent the pinned layer. The pinned layer, and the anti-ferromagnetic layer both have surface areas which are greater than the area associated with the AP free layer. The anti-ferromagnetic layer, in one embodiment, has a pinning strength in the range of 0.5 erg/cm | 04-09-2015 |
20150310881 | MAGNETIC RECORDING HEAD AND MAGNETIC RECORDING APPARATUS - The magnetic recording head according to an embodiment includes an air bearing surface configured to face a magnetic recording medium, a main magnetic pole including a main magnetic pole distal end, a first spin injection layer disposed on a leading side of the main magnetic pole, a field generation layer disposed on a trailing side of the main magnetic pole, and an intermediate layer configured to connect electrically the field generation layer to the first spin injection layer. The main magnetic pole is configured to apply a recording magnetic field to the magnetic recording medium. | 10-29-2015 |
20150325258 | STIFF DISCRETE INSERT ARRAY FOR THERMAL PTR MANAGEMENT WITH DESIRED INDUCED STRESS STATE THAT REDUCES TENDENCY FOR WRITE POLE ERASURE - Embodiments of the present invention generally relate to a magnetic device having a discontinuous array of columns disposed near a magnetic pole. Each column has a length extending perpendicular to an air bearing surface and a width. The length is greater than the width. | 11-12-2015 |
20150332720 | SYSTEMS AND METHODS FOR TUNING SEED LAYER HARDNESS IN COMPONENTS OF MAGNETIC RECORDING SYSTEMS - Systems and methods for tuning seed layer hardness in components of magnetic recording systems are described. One such system includes a substrate including a component of a magnetic recording system, a first deposition source configured to deposit a seed layer material on a portion of a top surface of the substrate at a first angle, and a second deposition source configured to deposit a carbon material including sp3 carbon bonds on the portion of the top surface at a second angle not equal to the first angle, where the first deposition source and the second deposition source deposit the seed layer material and the carbon material, respectively, simultaneously. The component can be a slider or a magnetic medium. | 11-19-2015 |
20150371668 | WRITE HEAD HAVING BEVELED NON-MAGNETIC WRITE GAP SEED LAYER - An apparatus has a main pole layer of magnetic material, a second layer of magnetic material, a first gap layer of non-magnetic material between the main pole layer and the second layer of magnetic material, and a second gap layer of non-magnetic material disposed between the main pole layer and the second layer of magnetic material. The second gap layer of non-magnetic material can be directly adjacent to the second layer of magnetic material. In accordance with one embodiment, this allows the gap to serve as a non-magnetic seed for the second layer of magnetic material. A method of manufacturing such a device is also described. | 12-24-2015 |
20150380018 | METHOD FOR FABRICATING A MAGNETIC WRITER HAVING AN ASYMMETRIC GAP AND SHIELDS - A method and system provide a magnetic transducer. An intermediate including multiple sublayers is provided. A trench is formed in the intermediate layer. A main pole having a bottom, a top wider than the bottom, a first side and a second side opposite to the first side is provided in the trench. An asymmetric gap is provided along the first and second sides of the main pole. The asymmetric gap terminates closer to the top of the main pole along the first side than on the second side. The asymmetric gap has a first thickness along the first side and a second thickness different from the first thickness along the second side. An asymmetric shield is provided on the asymmetric gap. The asymmetric shield includes a half side shield having a bottom between the top and the bottom of the main pole and terminating on the asymmetric gap. | 12-31-2015 |
20150380021 | ASPERITY AND HEAD-MEDIA CONTACT DETECTION USING MULTI-STAGE TEMPERATURE COEFFICIENT OF RESISTANCE SENSOR - A multi-stage sensor is situated on the head transducer and configured to interact with a magnetic recording medium. A first sensor stage of the multi-stage sensor has a temperature coefficient of resistance. A second sensor stage of the multi-stage sensor is coupled to the first sensor and has a temperature coefficient of resistance. The first sensor stage is configured to preferentially sense asperities of the media relative to the second sensor stage, and the second sensor stage configured to preferentially sense proximity to, and contact with, a surface of the media relative to the first sensor stage. The first and second sensor stages may be connected in series or in parallel. | 12-31-2015 |
20160005428 | GRADED SIDE SHIELD GAP READER - Embodiments of the present invention generally include magnetoresistive heads, such as read heads, having a sensor structure and side shields disposed adjacent to the sensor structure. The distance between the side shields and the sensor structure increase in a direction from an ABS in the off-track direction. The magnetoresistive heads may include tapered surfaces on the side shields or sensor structure, or may include stepped surfaces on the side shields or sensor structure. | 01-07-2016 |
20160027456 | Data Storage Device with Phase Lock Spin-Torque Oscillation Stabilization - A data storage device can be configured at least with a first spin-torque oscillator disposed between and contacting a write pole and a shield on an air bearing surface. A second spin-torque oscillator can be disposed between and contact the write pole and shield with the second spin-torque oscillator separated from the air bearing surface by a first stabilization distance and from the first spin-torque oscillator by a second stabilization distance. The first and second spin-torque oscillators can be configured to magnetostatically couple and phase lock to produce a single microwave frequency in response to a bias field. | 01-28-2016 |
20160125899 | PMR WRITER WITH CONSTANT SIDE WALL ANGLE - A writer main pole for a perpendicular magnetic recording system is provided. The writer pole may have a constant sidewall angle from the ABS to yoke and may be formed out of an insulating material and a magnetic material. The sidewall angle of the yoke region may be adjusted during manufacture. The ABS region may correspond to the magnetic material and the yoke region may correspond to the insulating material. The insulating material may comprise Alumina. The magnetic material may comprise a NiFe alloy. | 05-05-2016 |
20160133290 | WRITE POLE CONFIGURATION - A write head having a write pole with a tip portion defining a pole tip and a paddle portion extending from the tip portion away from the pole tip, the paddle portion defining a back edge. The write head also has a coil structure having at least two active turns crossing the paddle portion, wherein a back of the coil structure is no more than 1 micrometer past the back edge of the write pole. In some implementations, a length from the pole tip to the back edge is no more than 4.5 micrometers. | 05-12-2016 |
20160155460 | MAGNETIC MEDIA HAVING IMPROVED MAGNETIC GRAIN SIZE DISTRIBUTION AND INTERGRANULAR SEGREGATION | 06-02-2016 |
20160163339 | Slider With Aluminum Compound Fill - Embodiments disclosed herein generally relate to a magnetic device. The magnetic head of the magnetic device includes structure for protecting the media facing surface (MFS). The protective structure, which may be referred to as an air bearing surface overcoat (ABSOC) structure, includes an aluminum containing compound that is disposed on the slider and head. The ABSOC also includes a silicon containing compound and a carbon layer disposed thereover. | 06-09-2016 |
20160171992 | PROCESS FOR MAKING PMR WRITER WITH NON-CONFORMAL SIDE GAPS | 06-16-2016 |
20160254011 | Data Writer Front Shield with Varying Throat Height | 09-01-2016 |