109results about "Manufacture head surface" patented technology

Provided are a computer program product, device, system, and method for single data band data storage. In one embodiment, a tape head module has an array of four servo transducer elements for each servo band of a tape and an array of reader / writer transducer elements extending over most of the width of the tape. In another embodiment, a data storage tape has a top servo band positioned adjacent a top edge guard band of the tape, a bottom servo band positioned adjacent a bottom edge guard band of the tape, and a single data band positioned between the top and bottom servo bands and configured to receive tracks of data written by a tape head wherein the single data band width extends over most of the tape width.

Provided are a computer program product, device, system, and method for single data band data storage. In one embodiment, a tape head module has an array of four servo transducer elements for each servo band of a tape and an array of reader / writer transducer elements extending over most of the width of the tape. In another embodiment, a data storage tape has a top servo band positioned adjacent a top edge guard band of the tape, a bottom servo band positioned adjacent a bottom edge guard band of the tape, and a single data band positioned between the top and bottom servo bands and configured to receive tracks of data written by a tape head wherein the single data band width extends over most of the tape width.

According to one embodiment, a disk device includes a magnetic disk, a magnetic head, a flexure, a piezoelectric element, a first bonding material, a second bonding material, and a protrusion. The flexure includes a first outer surface, a first pad, and a second pad. The first pad and the second pad are on the first outer surface. The piezoelectric element includes a second outer surface, a first electrode, and a second outer surface. The first electrode and the second electrode are on the second outer surface. The first bonding material, which is conductive, bonds the first pad and the first electrode. The second bonding material, which is conductive, bonds the second pad and the second electrode. The protrusion is provided on the flexure, is located at least partially between the first bonding material and the second bonding material, and protrudes from the first outer surface.

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.

The present embodiments relate to a near field transducer for thermally-assisted magnetic recording (TAMR) with a hybrid plasmonic bottom layer. In a first example embodiment, a thermally-assisted magnetic recording (TAMR) write head is provided. The TAMR write head can include a main pole and a near field transducer (NFT). The NFT can include a first layer and a second layer. The first layer can include a first plasmonic material (e.g., rhodium, iridium, platinum). Further, the first layer can be disposed adjacent to the heat sink. The second layer can include a portion of a second plasmonic material (e.g., gold) and a first plasmonic portion (e.g., comprising rhodium). The first plasmonic portion of the second layer can be disposed adjacent to the ABS. The hybrid second layer (e.g., plasmonic bottom layer) can provide an improved NFT reliability during TAMR writing.

The present embodiments relate to methods for manufacturing a write head that prevents seamlines being present in a main pole. An oxide layer can be disposed over a Ruthenium (Ru) layer over a side shield over a first side of a trench formed in the side shield. A photo resist patterning process can clean the oxide layer and expose a portion of the Ru layer for main pole electroplating. The main pole can be electroplated in the trench such that the main pole contacts the Ru layer at a second side of the trench. The photo resist can be stripped and a planarization process can planarize the side shield and main pole surface.

The present embodiments relate to a perpendicular magnetic recording (PMR) write head with a Two Tunable bias branch design that can electrical separate a WS1 / PP3 and a SS / LS to form two tunable bias branches. A write head can include a main pole, a write gap(WG) disposed adjacent to the main pole, and a hot seed (HS) layer connected to the WG. The PMR write head can also include a trailing shield, a side shield and a leading shield. Two tunable bias branches can be formed to electrically separate the trailing shield and the side and leading shields. A first branch can include a first electrical path between the main pole and the trailing shield. The tunable bias branches can also include a second branch forming a second electrical path between the main pole and the side and leading shields.

A servo pattern recording head includes: a plurality of head cores that are magnetically separated from each other; and a plurality of gap patterns that are formed on a front surface of each of the plurality of head cores and that are used for recording a plurality of servo patterns in a width direction of a magnetic tape by applying a magnetic field to the magnetic tape in response to a pulse current, in which the plurality of gap patterns are formed on the front surface along a direction corresponding to the width direction, and the plurality of gap patterns deviate from each other at a predetermined interval in a direction corresponding to a longitudinal direction of the magnetic tape between the gap patterns adjacent to each other along the direction corresponding to the width direction.

The present disclosure is generally related to a magnetic recording device comprising a magnetic recording head having a first current flow in a cross-track direction through a trailing shield. In one or more embodiments, a second current flows in a cross-track direction around the main pole. The magnetic recording device comprises a main pole disposed between a trailing shield, a leading shield, and side shields. A trailing gap is disposed between the side shields and the trailing shield. A high moment seed layer is disposed between the main pole and the trailing shield. A first insulation layer is disposed within the trailing shield and directs the first current through the trailing shield, guided to the proximity of the main pole. A second insulation layer, disposed below the trailing shield, directs the second current through the trailing shield, or alternatively through the side shields and around the main pole.

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.

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.

According to one embodiment, a disk device includes a magnetic disk, a magnetic head, a flexure, a piezoelectric element, a first bonding material, a second bonding material, and a protrusion. The flexure includes a first outer surface, a first pad, and a second pad. The first pad and the second pad are on the first outer surface. The piezoelectric element includes a second outer surface, a first electrode, and a second outer surface. The first electrode and the second electrode are on the second outer surface. The first bonding material, which is conductive, bonds the first pad and the first electrode. The second bonding material, which is conductive, bonds the second pad and the second electrode. The protrusion is provided on the flexure, is located at least partially between the first bonding material and the second bonding material, and protrudes from the first outer surface.

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.

An embodiment provides a disk device capable of improving durability against thermal stress. The disk device involved in one embodiment includes a recording medium, a first magnetic head, a first wiring member, a flexible printed wiring board, and wiring. The first wiring member is electrically connected to the first magnetic head. The flexible printed wiring board has a surface, a first fixing portion fixed to a first component, and a second fixing portion fixed to a second component, and is electrically connected to the first magnetic head via the first wiring member. The wiring is arranged on the flexible printed wiring board, extends along the surface, and extends between the first fixing portion and the second fixing portion in a direction intersecting at an angle greater than 45° and less than 90° relative to the direction in which an imaginary line extends, and the imaginary line is an imaginary line connecting the first fixing portion and the second fixing portion with the shortest distance along the surface.

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.

To provide a magnetic tape that can exhibit excellent electromagnetic conversion characteristics, and is excellent in running stability in recording and / or playing back data at different head inclination angles in a high temperature and high humidity environment.SOLUTION: There is provided a magnetic tape in which a vertical direction switching field distribution SFD of the magnetic tape is 1.5 or less, in an environment of a temperature of 32°C and relative humidity of 80%, frictional force F45° on a surface of a magnetic layer with respect to an LTO8 head measured at a head inclination angle of 45° is 4 gf or more and 15 gf or less, and a standard deviation of the frictional force F on the surface of the magnetic layer with respect to the LTO8 head measured at head inclination angles of 0°, 15°, 30°, and 45° is 10 gf or less. Also there are provided a magnetic tape cartridge including the magnetic tape, and a magnetic tape device including the magnetic tape.SELECTED DRAWING: None

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.

According to one embodiment, a magnetic head includes a first magnetic pole, a second magnetic pole, and a magnetic element. The magnetic element is provided between the first magnetic pole and the second magnetic pole in a first direction from the first magnetic pole to the second magnetic pole. The magnetic element includes a first magnetic layer provided between the first magnetic pole and the second magnetic pole, a second magnetic layer provided between the first magnetic layer and the second magnetic pole, a third magnetic layer provided between the second magnetic layer and the second magnetic pole, and a fourth magnetic layer provided between the third magnetic layer and the second magnetic pole. The first magnetic layer includes a first face facing the first magnetic pole. The fourth magnetic layer includes a second face facing the second magnetic pole.

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.

According to one embodiment, a magnetic head includes first and second magnetic poles, and a stacked body provided between the first and second magnetic poles. The stacked body includes a first magnetic layer, a second magnetic layer provided between the first magnetic layer and the second magnetic pole, a first nonmagnetic layer provided between the first and second magnetic layers, a second nonmagnetic layer provided between the second magnetic layer and the second magnetic pole, and a third nonmagnetic layer provided between the first magnetic pole and the first magnetic layer. The first magnetic layer includes a first element including at least one of Fe, Co, or Ni. The second magnetic layer includes (Fe100-xCox)100-yEy. A second element E includes at least one selected from the group consisting of Cr, V, Mn, Yi, and Sc. The first magnetic layer does not include the second element.

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.

To provide a detection device, an inspection device, a magnetic tape drive, a magnetic tape system, a detection method, an inspection method, and a program capable of accurately detecting a servo pattern signal even if there are variations in geometric characteristics of a servo pattern.SOLUTION: A detection device includes a processing device and a storage medium. The storage medium stores an ideal waveform signal in advance representing an ideal waveform of a servo pattern signal resulting from reading of the servo pattern recorded on a servo band of a magnetic tape by a servo reading element. The processing device obtains the servo band signal resulting from reading of the servo band by the servo reading element and detects the servo pattern signal by comparing the servo band signal and the ideal waveform signal.SELECTED DRAWING: Figure 10

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.