59results about "Manufacture head surface" patented technology

To provide a magnetic recording device capable of stable recording operation.SOLUTION: A magnetic recording device 150 includes a magnetic recording medium group 20 and a magnetic head group 30. The magnetic recording medium group includes a first magnetic recording medium 21; a plurality of second magnetic recording media 22; and a plurality of third magnetic recording media 23. The magnetic head group includes a first magnetic head 31; a plurality of second magnetic heads 32; and a plurality of third magnetic heads 33. The first magnetic head can record data in the first magnetic recording medium by a first method. The plurality of second magnetic heads can record data in the plurality of second magnetic recording media by a second method. The plurality of third magnetic heads can record data in the plurality of third magnetic recording media by the second method. The first magnetic recording medium is provided between the plurality of second magnetic recording media and the plurality of third magnetic recording media in a first direction D1. The other magnetic recording medium in which the data is recorded by the first method does not overlap with the magnetic recording medium group in the first direction.SELECTED DRAWING: Figure 1

Improve non-repetitive runout (NRRO) associated with the system's structural dynamics and operating vibrations. [Solution] A data storage device such as a hard disk drive (HDD) includes a rotary pivot bearing assembly of a rotary actuator configured with a bearing span smaller than the maximum available bearing span, thereby reducing the rotary pivot tilt (PT) gain of the corresponding acoustic transfer function relative to the rotational pivot tilt (PT) gain of the original acoustic transfer function corresponding to the maximum available bearing span. To counteract the resulting decrease in coil torsion and rotational pivot tilt frequency, the voice coil is thickened vertically to increase the coil torsion (CT) frequency and rotational pivot tilt frequency, bringing them closer to their values ​​in the original acoustic transfer function. Combining a relatively short bearing span with a relatively thick voice coil ensures and improves performance by maintaining relatively high CT and PT frequencies while guaranteeing a relatively low PT gain.

Provided in the present application are a magnetic recording medium, a positioning method, and a related device. The magnetic recording medium comprises a servo band and a positioning band, wherein the servo band is used for indicating longitudinal position information; and the positioning band is used for indicating physical position information, whch is used for indicating the real physical position of the longitudinal position information in the magnetic recording medium. In the magnetic recording medium, in addition to the existing servo band, a positioning band for indicating physical position information is additionally provided. The physical position information can indicate the real physical position of a certain point, and thus the position information of the magnetic recording medium at the logical level and the position information of the magnetic recording medium at the physical level are interconnected, facilitating physical-level processing on the magnetic recording medium by a user.

The present embodiments can generally provide a magnetic write head structure with optimized gap current distribution to maximize the current-assisted areal density capacity (ADC) gain in hard-disk-drive storage devices. In a first example embodiment, a non-dual-write-shield (nDWS) write head can include a main pole (MP), a trailing shield (TS), and a write gap (WG) disposed between the MP and the TS. The write head can also include a side shield (SS), a leading shield (LS), and a write shield (WS). The write head can include a side gap (SG) between the MP and the SS on both sides of the MP tip, and a leading gap (LG) between the MP and the LS. The write head can also include a coil wrapped around the MP through a PP3 shield that is configured to direct a time-dependent write current to saturate magnetization of the MP.

Provided is a magnetic recording device capable of achieving an increase in recording density. According to an embodiment, the magnetic recording device includes a magnetic head and a control section. The magnetic head includes a first magnetic pole, a magnetic element, and a coil, and the magnetic element includes a magnetic layer. The control section is electrically connected to the magnetic element and the coil. The control section is capable of supplying a recording current to the coil and an element current to the magnetic element. The recording current includes a first period of a first polarity, a second period of a second polarity different from the first polarity, a third period of transition from the first period to the second period, and a fourth period of transition from the second period to the first period. The element current includes a direct current component and an alternating current component. The alternating current component in the first period is the same as the alternating current component in the second period, the alternating current component in the third period, and the alternating current component in the fourth period.

The present embodiments relate to a write head with an asymmetrical side gap (SG) design. In the asymmetrical design, the main pole can be disposed offset to a central axis of the write head such that the main pole is closer to a first side shield (SS) portion than a second SS portion. The asymmetrical design can be achieved using an ion-beam etching (IBE) or ion-beam deposition (IBD) process. The asymmetrical design can provide a narrower side gap width while mitigating any writability limitations or constraints caused by scaling down the SG.

A data storage device, such as a hard disk drive (HDD), incorporates a rotatable actuator-rotary bearing assembly with a rotary drive configured with a bearing spacing smaller than the maximum available bearing spacing. This reduces the pivot-tilt gain of a corresponding acoustic transfer function relative to the pivot-tilt gain (PT gain) of an original acoustic transfer function equal to the maximum available bearing spacing. To counteract the resulting reductions in the coil torsion and pivot frequencies, the voice coil is vertically thickened to increase the coil torsion frequency (CT frequency) and pivot frequency, bringing them closer to their values ​​in the original acoustic transfer function.By combining a relatively short bearing spacing with a relatively thick voice coil, relatively high CT and PT frequencies are maintained while ensuring a relatively low PT gain, thereby improving the structural dynamics of the system and the NRRO associated with operational vibrations.

An apparatus, in accordance with one aspect of the present invention, includes a writer, having a first write pole having a pole tip extending from a media facing side of the first write pole, and a second write pole having a pole tip extending from a media facing side of the second write pole. A nonmagnetic write gap is positioned between the pole tips of the write poles. A high moment layer is positioned between the write gap and the pole tip of the second write pole. The high moment layer has a higher magnetic moment than a magnetic moment of the pole tip of the second write pole. The high moment layer is segmented into at least two portions by one or more decoupling spacers positioned between adjacent ones of the portions. Another aspect includes an apparatus with an array of such writers.

When servo heads in a head chip of a servo write head assembly record servo patterns onto a tape's servo tracks, the servo heads are continuously being rapidly worn away by the tape. This general wear affects the servo heads' ability to record the servo patterns, impairing accurate positioning of the tape heads in the drive. However, by implementing, on the leading edge of the head chip, a support block that has a wear resistant skiving edge and landing zone for the tape “crow bar,” which forms when the tape is running over the servo head, the general wear of the servo heads from the tape is mitigated. The skiving edge, which may be formed by thin film technology process steps, causes the tape to fly over the head chip in those regions. An additional support block may be implemented at the trailing edge of the head chip.

Described is a recording head that includes a notched write pole to enhance perpendicularity of the write pole field. The write pole notch is formed at the media-facing surface and the leading edge of the write pole. The write pole notch is filled with a non-magnetic metal. The recording head further includes a near field transducer located in front of the leading edge of the write pole and having a portion extending to the media-facing surface that is spaced apart from the notch, thereby forming a gap between the near field transducer and the notch.

A magnetic recording writer is disclosed. The writer can include a main pole and side shields that have a first sidewall portion proximate to the ABS facing the curved sidewalls of the main pole and formed substantially conformal to the curved sidewalls up to a height of about 10 to 200 nm above the ABS, a second sidewall portion proximate to the corner connecting the first flared sidewalls and the curved sidewalls of the main pole and formed substantially conformal to the curved sidewalls up to the height of about 10 to 200 nm above the ABS, a third sidewall portion connected to the second sidewall portion and formed substantially conformal to the first flared sidewall, and a fourth sidewall portion connected to the third sidewall portion and formed substantially parallel to the ABS; and a side gap separating the main pole from each side shield.

Aspects of the present disclosure generally relate to magnetic recording heads of magnetic recording devices. A read head includes a first reader, an insulating separation layer, and a second reader disposed above the insulating separation layer. The second reader includes a magnetic seed layer and a cap layer. The second reader includes a first upper free layer disposed between the magnetic seed layer and the cap layer, and a second upper free layer disposed between the first upper free layer and the cap layer. The second reader includes a barrier layer. In one embodiment, the second reader includes an anti-ferromagnetic (AFM) layer disposed between the magnetic seed layer and the insulating separation layer to pin the magnetic seed layer.

The present disclosure generally relates to a head assembly in a data storage device. The data storage device may include magnetic media embedded in the device or magnetic media from an insertable cassette or cartridge (e.g., in an LTO drive), where the head assembly reads from and writes to the magnetic media. During device operation, the magnetic media moves across the head assembly. The magnetic media experiences higher contact stress at certain points or portions of the head assembly. A sensor guard is coupled to the head assembly. The sensor guard comprises at least one chamfered surface or at least one stepped surface to decrease the contact stress between the magnetic media and the head assembly during device operation. The at least one chamfered or stepped surface may be disposed on a leading edge of the sensor guard.

According to one embodiment, a magnetic head includes a reproducing section. The reproducing section includes a first shield, a second shield, a third shield, a fourth shield, a first magnetic layer, a first intermediate layer, and a second intermediate layer. A second direction from the third shield to the fourth shield crosses a first direction from the first shield to the second shield. The first magnetic layer is provided between the first shield and the second shield and between the third shield and the fourth shield. The first intermediate layer is provided between the first shield and the first magnetic layer, and is nonmagnetic. The second intermediate layer is provided between the first magnetic layer and the second shield, and is nonmagnetic. The second intermediate layer length of the second intermediate layer is shorter than a first intermediate layer length of the first intermediate layer along the second direction.

In an approach to improving write transducers, a write transducer for recording data on a magnetic medium is disclosed. The write transducer includes a first pole piece. The write transducer further includes a second pole piece. The first pole piece and the second pole piece are arranged such that a write gap is formed between the first pole piece and the second pole piece. A longitudinal axis is defined between opposing ends of the write gap. The length of the write gap along the longitudinal axis varies in a direction transverse to the longitudinal axis.

This invention provides a main magnetic pole design method and a writing head that maximize the areal density capacity in direct magnetic recording (PMR). [Solution] A principal magnetic pole (MP) design method having a triangular shape and a leading edge taper to maximize surface density capacity, wherein the leading edge taper is included on the leading shield (LS) to form a taper angle on the MP to concentrate magnetic flux on the MP 102. The MP may be shifted away from the LG to provide an additional leading gap (LG) portion on the front side of the MP, and the taper angle may be larger than the LG in the additional LG portion. The MP design results in a larger MP surface area on the air bearing surface (ABS) and a larger magnetic flux to the medium bit.

The present embodiments relate to a PMR write-head structure where the spin-orbit torque (SOT) material is in contact with the main pole in the write gap (WG). In addition, with the write shield (WS) electrically isolated from the side shield (SS) in the present designs, the current can be confined in the SOT material near the main pole, and the device resistance can remain within a reasonable range. It can be shown, using simulations, that the main pole switching rise time can be improved by 18˜24% using spin-orbit torque from heavy metals like platinum.

To provide a magnetic head and a magnetic recording device for improving recording density.SOLUTION: A magnetic head 110 includes a first magnetic pole 31 and a second magnetic pole 32, a laminate 20, and a first terminal T1 to a third terminal T3. The laminate 20 is provided between the first magnetic pole 31 and the second magnetic pole 32. The laminate body 20 includes a first magnetic layer 21 to a fourth magnetic layer 24 and a first non-magnetic layer 41 to a fifth non-magnetic layer 45. The first terminal T1 is electrically connected to the first magnetic pole 31. The second terminal T2 is electrically connected to the second magnetic pole 32. The third terminal T3 is electrically connected to the third non-magnetic layer 43.SELECTED DRAWING: Figure 1

A suspension assembly for a hard disk drive includes a load beam coupled with a corresponding flexure via a centerline weld at a distal portion of the flexure, where the flexure further includes a gimbal portion at least in part formed away from the load beam in proximity to the centerline weld. The gimbal portion may be formed away from the load beam by way of mechanical forming prior to welding to the load beam and / or at least lateral portions may be formed away from the load beam by way of laser irradiation to the flexure subsequent to welding to the load beam. In either case, clearance between the pivoting gimbal flexure and the corresponding load beam around the vicinity of the centerline weld attachment point is enabled, to provide freedom from interference between the parts and stable resonance modes throughout the media load z-height variations.

In a tape drive comprising a tape head module, a tape contacts the tape head module during operation. The tape head module comprises a substrate, a plurality of data heads disposed adjacent to the substrate at a media facing surface (MFS), and a closure disposed adjacent to the plurality of data heads. The closure comprises a first side portion disposed at a leading edge, a second side portion disposed at the leading edge, the first and second side portions being recessed from the MFS, and a central portion disposed between the first and second side portions at the leading edge. In some embodiments, the central portion is recessed from the MFS. The central portion may comprise a notch, a taper, or one or more steps. The first and second side portions may be tapered, rounded, or comprise one or more steps to reduce contact of a tape during operation.

In a module of a tape head having multiple modules, a beam support member of at least one module has an alignment leg portion projecting from a body portion of the beam support member at a position displaced from the ends of the beam support member. The alignment leg of one module is matched with the alignment leg of another module to maximize glue adhesion between the legs and minimize positional drifting of the modules after glue curing in a staggered orientation. In another aspect, the support surface of a beam support member of a tape head module extends beyond the end of the wafer chiplet disposed on the beam support member to fully support the wafer chiplet. In still another aspect, one end of a beam support member of a tape head module is chamfered to facilitate mounting the tilted tape head assembly into a tape drive actuator.

The present disclosure generally relates to spin-orbital torque (SOT) differential reader designs. The SOT differential reader is a multi-terminal device that comprises a first shield, a first spin hall layer, a first free layer, a gap layer, a second spin hall layer, a second free layer, and a second shield. The gap layer functions as an electrode and is disposed between the first spin hall layer and the second spin hall layer. Electrical lead connections are located about the first spin hall layer, the second spin hall layer, the gap layer, the first shield, and / or the second shield. The electrical lead connections facilitate the flow of current and / or voltage from a negative lead to a positive lead. The positioning of the electrical lead connections and the positioning of the SOT differential layers improves reader resolution without decreasing the shield-to-shield spacing (i.e., read-gap).

The invention relates to bearing span reduction with increased coil thickness for improved actuator structural dynamics in hard disk drives. A data storage device, such as a hard disk drive (HDD), includes a rotary actuator pivot bearing assembly configured to have a bearing span that is less than a maximum available bearing span so that a pivot tilt (PT) gain of an original acoustic transfer function corresponding to the maximum available bearing span is greater than a pivot tilt (PT) gain of the original acoustic transfer function corresponding to the maximum available bearing span. The pivot tilt gain of the corresponding acoustic transfer function is reduced. To counteract a subsequent reduction in the coil torsion frequency and the pivot tilt frequency, the voice coil is vertically thickened to increase the coil torsion (CT) frequency and the pivot tilt frequency closer to their values in the original acoustic transfer function. Combining a relatively short bearing span with a relatively thick voice coil maintains relatively high CT and PT frequencies while ensuring relatively low PT gain, thereby improving the structural dynamics of the system and the NRRO associated with operational vibrations.

The present embodiments relate to write heads implementing microwave-assisted magnetic recording utilizing multiple spin torque oscillators (STOs). Each STO can include a field-generation layer (FGL) that can oscillate in a same frequency and out of phase with one another. The layers in each STO can enable mutual spin transfer torques between adjacent layers, which can drive the FGLs into a large angle oscillation. The oscillation between the FGLs can cause a magnetic field to be generated that can assist in writing to a magnetic recording medium.

Data storage devices including sorbent compositions and related articles, systems, and methods are disclosed. The present disclosure provides a data storage device that includes one or more articles of manufacture. An article includes a sorbent composition having one or more molecular sieves for adsorbing one or more organic compounds, and a binder component including at least one cured rubber. Related methods of making articles.

Provided is magnetic tape wherein, in an environment having a temperature of 23°C and a relative humidity of 50%, the AlFeSil wear value45° of a magnetic layer surface that is measured at a 45° AlFeSil square bar tilt angle is 20-50 µm, inclusive, and the standard deviation of the AlFeSil wear value of the magnetic layer surface measured at each of a 0°, 15°, 30°, and 45° AlFeSil square bar tilt angle is at most 30 µm. The AlFeSil square bar tilt angle is the angle formed between the lengthwise direction of the AlFeSil square bar and the width direction of the magnetic tape. Also provided are a magnetic tape cartridge including the magnetic tape, and a magnetic tape device.

A magnetic head and a magnetic recording device capable of improving recording density are provided. According to an embodiment, the magnetic head includes a first pole, a second pole, and a laminate provided between the first pole and the second pole. The laminate includes a first magnetic layer, a second magnetic layer provided between the second pole and the first magnetic layer, a third magnetic layer provided between the second pole and the second magnetic layer, a first non-magnetic layer provided between the first magnetic layer and the first pole, a second non-magnetic layer provided between the second magnetic layer and the first magnetic layer, a third non-magnetic layer provided between the third magnetic layer and the second magnetic layer, and a fourth non-magnetic layer provided between the second pole and the third magnetic layer. A first thickness of the first magnetic layer in a first direction from the first pole toward the second pole is thicker than a second thickness of the second magnetic layer in the first direction. A third thickness of the third magnetic layer in the first direction is thicker than the second thickness.

The invention provides a magnetic recording medium, a positioning method and related equipment, the magnetic recording medium comprises a servo belt and a positioning belt, the servo belt is used for indicating longitudinal position information, the positioning belt is used for indicating physical position information, and the physical position information is used for indicating a real physical position of the longitudinal position information on the magnetic recording medium. In the magnetic recording medium, in addition to the original servo band, a positioning band for indicating physical position information is additionally added. The physical position information can indicate the real physical position of a certain point, so that the position information of the magnetic recording medium on the logic level and the position information of the magnetic recording medium on the physical level are communicated, and a user can conveniently process the magnetic recording medium on the physical level.

A disk device capable of inhibiting diffusion of a joint body in an undesirable direction is provided. A disk device of one embodiment includes a magnetic disk, a head, a flexible member, a piezoelectric element, a first joint body, a second joint body, and a protrusion. The flexible member has a first outer surface and a first land and a second land provided to the first outer surface. The piezoelectric element has a second outer surface facing the first outer surface and a first electrode and a second electrode provided to the second outer surface. The first joint body joins the first land and the first electrode. The second joint body joins the second land and the second electrode. The protrusion is provided to the flexible member, is positioned between the first joint body and the second joint body, and protrudes from the first outer surface.