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Magnetic sensor, magnetic head and magnetic recording device,Magnetic recording device,Magnetic head and magnetic recording device,Magnetic head and magnetic recording device,Magnetic head and magnetic recording device

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39results about "Shielding heads" patented technology

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Magnetic sensor, magnetic head and magnetic recording device

PendingUS20260107690A1Record information storageShielding heads

According to one embodiment, a magnetic sensor includes a detection section including first to fourth shields, a first magnetic member, first to fourth conductive members being non-magnetic. 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 member is provided between the first shield and the second shield and between the third shield and the fourth shield. The first to fourth conductive members, satisfy one of first to fourth conditions regarding first to third materials. The first material includes at least one selected from the group consisting of Nb, Mo, Tc, Ta, W, and Re. The second material includes at least one selected from the group consisting of Ru, Rh, Pd, Os, Ir, and Pt. The third material includes at least one selected from the group consisting of Cu, Al, Tb, and Cr.

Magnetic sensor, magnetic head and magnetic recording device

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Owner:KK TOSHIBA

Magnetic recording device

PendingUS20260065930A1Construction of head windingsHeads using thin filmsMagnetic polesCondensed matter physics

According to one embodiment, a magnetic recording device includes a magnetic head, and a controller. The magnetic head including a first magnetic pole, a second magnetic pole, a magnetic element provided between the first magnetic pole and the second magnetic pole, a coil, a first terminal, and a second terminal. The controller is configured to switch between a first operation and a second operation. In the first operation, the controller is configured to supply a first recording coil current to the coil while supplying a first recording element current to the magnetic element. In the second operation, the controller is configured to supply a second recording coil current to the coil while supplying a second recording element current to the magnetic element.

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Owner:KK TOSHIBA +1

Magnetic head and magnetic recording device

PendingUS20260004804A1Record information storageShielding headsMechanical engineeringPhysics

According to one embodiment, a magnetic head includes a reproducing section including a first reproducing element. The first reproducing element includes first to fourth shields, a first magnetic member, and third and fourth conductive members. The first magnetic member is provided between the first shield and the second shield, and between the third shield and the fourth shield. The first magnetic member includes a first portion and a second portion. The fourth conductive member includes a first conductive portion. A first distance in a third direction between the first end and the third conductive member is shorter than a second distance in the third direction between the second end and the first conductive portion. The third direction crosses a plane including the first direction and the second direction.

Magnetic head and magnetic recording device

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Owner:KK TOSHIBA

Magnetic head and magnetic recording device

PendingUS20260004803A1Record information storageShielding headsMechanical engineeringPhysics

According to one embodiment, a magnetic head includes reproducing section including a first reproducing element. The first reproducing element including first to fourth shields, a first magnetic member, and first and second conductive members. The first magnetic member is provided between the first shield and the second shield, and between the third shield and the fourth shield. The first shield includes a first end corresponding to a medium facing face. The second shield includes a second end corresponding to the medium facing face. A first distance between the first end and the first conductive member in a third direction crossing a plane including the first direction and the second direction is longer than a second distance between the second end and the second conductive member in the third direction.

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Owner:KK TOSHIBA

Magnetic head and magnetic recording device

ActiveCN115910115BRecord information storageShielding headsMagnetic polesRecording density

To provide a magnetic head and a magnetic recording device capable of improving recording density. According to an embodiment, a magnetic head includes a pole, a shield, and a non-magnetic layer. The non-magnetic layer is disposed between the pole and the shield. The non-magnetic layer is in contact with the pole and the shield. The non-magnetic layer contains at least one first element selected from Cu, Au, Cr, V, Al, and Ag.

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Owner:KK TOSHIBA +1

Magnetic recording device

ActiveCN115910116BMaterials with ironManufacture head surfaceAC - Alternating currentMagnetic poles

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.

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Owner:KK TOSHIBA +1

ARRANGEMENT AND METHOD FOR REDUCING BASELINE SHIFT FOR A SOT DIFFERENTIAL READER

ActiveDE602021040955T2Manufacture head surfaceManufacture of flux-sensitive headsBaseline shiftMaterials science

Owner:WESTERN DIGITAL TECHNOLOGIES INC

Magnetic Recording Writer With Improved Side Shield

PendingUS20260134881A1Manufacture head surfaceHeads using thin filmsMechanical engineeringPhysics

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.

Magnetic Recording Writer With Improved Side Shield

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Owner:HEADWAY TECHNOLOGIES INC

Magnetic head and magnetic recording device

PendingJP2026007002AHeads using thin filmsRecord information storageElectrical connectionCondensed matter physics

To provide a magnetic head and a magnetic recording device capable of improving characteristics.SOLUTION: According to one embodiment, a magnetic head includes a reproducing part including a first reproducing element. The first reproducing element includes first to fourth shields, a first magnetic member, a first connection conductive member, and first to fifth terminals. The first magnetic member is provided between the first and second shields and between the third and fourth shields. The first magnetic member includes first to fourth portions. The first connecting conductive member is electrically connected with the first magnetic member. The first terminal is electrically connected to the first portion. The second terminal is electrically connected to the second portion. The third terminal is electrically connected to the third portion. The fourth terminal is electrically connected to the fourth portion. The fifth terminal is electrically connected with the first connecting conductive member.SELECTED DRAWING: Figure 1

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Owner:KK TOSHIBA

Magnetic read sensor with stable upper reader and related methods

ActiveCN115798522BManufacture head surfaceBase layers for recording layersMechanical engineeringMaterials science

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.

Magnetic read sensor with stable upper reader and related methods

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Owner:WESTERN DIGITAL TECHNOLOGIES INC

Magnetic recording device

PendingJP2026046722AConstruction of head windingsHeads using thin films

To provide a magnetic recording device that enables improved recording density. [Solution] According to the embodiment, the magnetic recording device includes a magnetic head and a control unit. The magnetic head includes first and second magnetic poles, a magnetic element, and a coil. The control unit is configured to switch between performing a first operation and a second operation. In the first operation, the control unit supplies a first recording element current to the magnetic element. In the second operation, the control unit supplies a second recording element current to the magnetic element. The first recording element current is less than or equal to a first current value. The second recording element current exceeds the first current value.

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Owner:KK TOSHIBA +1

Magnetic head and magnetic recording device

PendingUS20260004805A1Record information storageShielding headsAcousticsGeophysics

According to one embodiment, a magnetic head includes a first element, a second element, a first shield terminal, a first opposing shield terminal, a second shield terminal, a second opposing shield terminal, a first side shield terminal, a second side shield terminal, and a common side shield terminal. The first element includes a first shield, a first opposing shield, a first side shield, a first opposing side shield, and a first magnetic member. A direction from the first shield to the first opposing shield is along a first direction. The second element includes a second shield, a second opposing shield, a second side shield, a second opposing side shield, and a second magnetic member. A direction from the second shield to the second opposing shield or a direction from the second opposing shield to the second shield is along the first direction.

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Owner:KK TOSHIBA

Magnetic sensor, magnetic head, and magnetic recording device

ActiveJP7820275B2Heads using thin filmsManufacture of flux-sensitive heads

To provide a magnetic sensor, a magnetic head, and a magnetic recorder, which improve resolution.SOLUTION: A magnetic sensor 70A comprises a first shield 41 to a sixth shield 46, first and second magnetic layers 11 and 12, and a first member 31. The first magnetic layer 11 is between the third shield 43 and the fourth shield 44. The second magnetic layer 12 is between the first magnetic layer 11 and the second shield 42 and is between the fifth shield 45 and the sixth shield 46. The second magnetic layer 12 is electrically connected to the fifth shield 45 and the sixth shield 46. The first member 31 includes a first region 31a and a second region 31b. The first region 31a is provided between the third shield 43 and the first magnetic layer 11. The second region 31b is provided between the first magnetic layer 11 and the fourth shield 44.SELECTED DRAWING: Figure 1

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Owner:KK TOSHIBA

Magnetic recording device

PendingJP2026046723AConstruction of head windingsHeads using thin films

To provide a magnetic recording device that enables improved recording density. [Solution] According to the embodiment, the magnetic recording device includes a magnetic head and a control unit. The magnetic head includes first and second magnetic poles, a magnetic element, a coil, a first terminal, and a second terminal. The control unit is configured to perform a first operation. In the first operation, the control unit is configured to supply a recording element current to the magnetic element and a recording coil current to the coil. The absolute value of the recording coil current is less than or equal to the first coil current value corresponding to the first peak.

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Owner:KK TOSHIBA +1

Magnetic recording apparatus

PendingCN121641079AConstruction of head windingsRecord information storageMagnetic polesRecording density

The present disclosure provides a magnetic recording device capable of improving recording density. According to one embodiment, a magnetic recording apparatus includes a magnetic head and a control unit. The magnetic head includes a first magnetic pole, a second magnetic pole, a magnetic element, a coil, a first terminal, and a second terminal. The control unit is configured to perform a first operation. In the first operation, the control unit supplies a recording-time element current to the magnetic element and supplies a recording-time coil current to the coil. The absolute value of the coil current during recording is equal to or less than a first coil current value corresponding to the first peak.

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Owner:KK TOSHIBA +1

Perpendicular magnetic recording head equipping a spin torque oscillator element with an electric current in side gaps

ActiveUS12603103B2Record information storageShielding headsSpin torque oscillatorsSpin-transfer torque

The present embodiments relate to a perpendicular magnetic recording (PMR) write head with an STO element and configured to direct an electric current between elements of the write head. A first example embodiment describes a perpendicular magnetic recording (PMR) write head. The PMR write head can include a main pole comprising a tip portion disposed adjacent to an air bearing surface (ABS) and is configured to interact with a magnetic recording medium. The PMR write head can also include a spin torque oscillator (STO) element disposed adjacent to the main pole. The PMR write head can also include a side shield layer with a portion of the side shield layer disposed adjacent to the ABS. The PMR write head can also include a metallic side gap layer disposed between the main pole and the side shield layer.

Perpendicular magnetic recording head equipping a spin torque oscillator element with an electric current in side gaps

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Owner:HEADWAY TECHNOLOGIES INC

Design and method to reduce baseline shift for a sot differential reader

ActiveEP4042494B1Manufacture head surfaceManufacture of flux-sensitive heads

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).

Design and method to reduce baseline shift for a sot differential reader

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Owner:WESTERN DIGITAL TECHNOLOGIES INC

Magnetic head and magnetic recording device

PendingJP2026098104AHeads using thin filmsRecord information storage

We provide a magnetic head that improves performance. [Solution] The magnetic head 110 includes first and second elements EL1 and EL2, first and second shield terminals 21a and 22a, first and second opposing shield terminals 21b and 22b, first and second side shield terminals 21s and 22s, and a common side shield terminal 20T. The first shield terminal is electrically connected to the first shield 41a of the first element and to the first opposing shield terminal. The second shield terminal is electrically connected to the second shield 42a of the second element, and the second opposing shield terminal is electrically connected to the second opposing shield 42b. The first side shield terminal is electrically connected to the first side shield 41s, the second side shield terminal is electrically connected to the second side shield 42s, and the common side shield terminal is electrically connected to the first opposing side shield 41r and the second opposing side shield 42r.

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Owner:KK TOSHIBA

Magnetic recording device

ActiveJP7867429B2Modification of read/write signalsSignal processing for reducing noise

To provide a magnetic recording device capable of improving recording density.SOLUTION: A magnetic recording device 210 includes a magnetic head 110 and a control unit 75. The magnetic head includes a first magnetic pole 31, a second magnetic pole 32, a magnetic element 20 provided between the first magnetic pole and the second magnetic pole, a first terminal T1 electrically connected to the first magnetic pole, a second terminal T2 electrically connected to the second magnetic pole, and a coil 30c. The control unit is electrically connected to the first terminal, the second terminal, and the coil. One end of the magnetic element is electrically connected to the first magnetic pole. The other end of the magnetic element is electrically connected to the second magnetic pole. The control unit can perform a recording operation. In the recording operation, the control unit supplies a recording current to the coil while applying an element voltage of a first voltage or more and a second voltage or less between the first terminal and the second terminal.SELECTED DRAWING: Figure 1

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Owner:KK TOSHIBA +1

Dual-spin torque oscillator designs in microwave assisted magnetic recording

ActiveUS12451156B2Manufacture head surfaceRecord information storageSpin torque oscillatorsSpin-transfer torque

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.

Dual-spin torque oscillator designs in microwave assisted magnetic recording

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Owner:HEADWAY TECHNOLOGIES INC

Resistor network for delivering current and a main pole coil and an assistive write element in a magnetic recording device

ActiveUS12573421B2Recording/reproducing/erasing methodsShielding headsControl theoryMechanical engineering

The present disclosure generally relate to a magnetic recording device comprising a write head and a resistor network coupled to the write head. The resistor network comprises a first path comprising a primary coil of the write head and a second path in parallel with the first current path, the second path comprising an assistive write element of the write head. A preamplifier coupled to the resistor network is configured to apply current to the first and second paths, where the current diverts into the first and second paths individually. The resistor network is coupled to the preamplifier by a single lead. The first path is configured to apply current to a primary coil of the write head. The second path is configured to apply current from a leading shield, via the assistive write element, to a trailing shield at a media facing surface.

Resistor network for delivering current and a main pole coil and an assistive write element in a magnetic recording device

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Owner:WESTERN DIGITAL TECHNOLOGIES INC

Magnetic head and magnetic recording device

ActiveJP7822271B2Heads using thin filmsRecord information storage

To provide a magnetic head and a magnetic recording device capable of improving recording density.SOLUTION: According to an embodiment, a magnetic head includes a first magnetic pole, a second magnetic pole, and a laminated body. The first magnetic pole includes a first surface and a second surface intersecting the first surface. The second surface includes a first surface region. The second magnetic pole includes a third surface and a fourth surface intersecting the third surface. The fourth surface includes a second surface region. A direction from the first surface region to the second surface region is along a first direction. The first surface region and the second surface region are along a second direction and a third direction. The first surface and the third surface are along the third direction. The laminated body is provided between the first surface region and the second surface region. The laminated body includes a first magnetic layer and a second magnetic layer. The second magnetic layer includes a second magnetic layer surface opposite to the second surface region. A width ratio of a second width along the third direction of the second magnetic layer surface to a first width along the third direction of the first surface area is 0.25 or more and 0.92 or less.SELECTED DRAWING: Figure 1

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Owner:KK TOSHIBA +1

Magnetic recording device

PendingUS20260065927A1Construction of head windingsHeads using thin filmsMagnetic polesElectric current flow

According to one embodiment, a magnetic recording device includes a magnetic head and a controller. The magnetic head includes a first magnetic pole, a second magnetic pole, a magnetic element provided between the first magnetic pole and the second magnetic pole, a first terminal, a second terminal, and a coil. In the first operation, the controller is configured to supply a recording coil current to the coil while supplying a recording element current to the magnetic element. An absolute value of the recording coil current is equal to or less than the first coil current value.

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Owner:KK TOSHIBA +1

Resistor network for delivering current and a main pole coil and an assistive write element in a magnetic recording device

PendingUS20260171110A1Recording/reproducing/erasing methodsShielding heads

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Owner:WESTERN DIGITAL TECHNOLOGIES INC

Magnetic recording device

ActiveJP7864014B2Heads using thin filmsRecord information storage

To provide a magnetic recorder capable of improving the recording density.SOLUTION: According to an embodiment, a magnetic recorder includes a magnetic head and a control unit. The magnetic head includes: a first magnetic pole; a second magnetic pole; a magnetic element which is provided between the first magnetic pole and the second magnetic pole; and a coil. The control unit is electrically connected to the magnetic element and the coil. The control unit enables recording operation. The control unit supplies a recording current to the coil while applying an element voltage to the magnetic element in the recording operation. An alternating magnetic field is generated from the magnetic element to which the element voltage has been applied. Differential resistance of electric resistance of the magnetic element when the voltage applied to the magnetic element while the recording current is supplied to the coil is changed turns into a first differential resistance peak when the applied voltage is a first voltage. The differential resistance turns into a second differential resistance peak when the applied voltage is a second voltage. The second voltage is higher than the first voltage. The element voltage is higher than the first voltage and less than the second voltage.SELECTED DRAWING: Figure 1

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Owner:KK TOSHIBA +1

Magnetic head and magnetic recording device

PendingUS20260004802A1Heads using thin filmsRecord information storageElectrical connectionElectrically conductive

According to one embodiment, a magnetic head includes a reproducing section including a first reproducing element. The first reproducing element includes first to fourth shields, a first magnetic member, a first connection conductive, first to fifth terminals. The first magnetic member is provided between the first shield and the second shield, and between the third shield and the fourth shield. The first magnetic member includes first to fourth portions. The first terminal is electrically connected to the first portion. The second terminal is electrically connected to the second portion. The third terminal is electrically connected to the third portion. The fourth terminal is electrically connected to the fourth portion. The fifth terminal is electrically connected to the first connecting conductive member.

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Owner:KK TOSHIBA

Perpendicular Magnetic Recording Writer with Tunable Two Bias Branches

PendingUS20250329343A1Manufacture head surfaceHeads using thin filmsMagnetic polesCondensed matter physics

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.