115results about "Heads using thin films" patented technology

Embodiments of the invention provide a write head for perpendicular recording in which the magnetic field intensity applied at a read element is reduced with larger write-field gradients and the distance between a write element and a read element is small. In one embodiment, a pair of magnetic bodies for shielding a read element are provided on the leading and trailing sides of the read element respectively and whichever one of the two shields is the longer in the length from the air bearing surface is shorter than the length up to the back contact position PBK at which a main pole and an auxiliary pole are connected.

The present disclosure generally relates to a magnetic recording head for a magnetic media drive. The magnetic recording head comprises a main pole, a waveguide disposed adjacent to the main pole, a near field transducer (NFT) coupled between the main pole and the waveguide, the NFT being recessed from a media facing surface (MFS), a thermal shunt disposed on the NFT, the thermal shunt being recessed from the MFS, and a stable material disposed between the NFT and the MFS. The stable material is spaced from the thermal shunt, and the stable material and the NFT comprise different materials. In some embodiments, a surface of the stable material facing the waveguide is tapered. The stable material may comprise two or more layers, the two or more layers comprising different materials.

A method of fabricating a near field transducer (NFT) in a thermally assisted magnetic recording (TAMR) head is disclosed. In some embodiments, the method includes: depositing a dielectric layer and a template layer on a waveguide core; patterning the template layer to form a template; depositing an Au NFT layer; planarizing the Au NFT layer to generate a planar layer; depositing an upper NFT layer; applying a peg patterning mask; etching the upper NFT layer and the planar layer that includes the Au NFT layer; removing the template; and depositing a dielectric material and planarizing an upper surface that includes the upper NFT layer.

To improve a thermal gradient of a near-field transducer (NFT) and increase an areal density capacity of a HAMR head.SOLUTION: An NFT includes a main pole (MP) 302, a two-layer transducer 304 positioned adjacent to the MP, a waveguide core 306, and a parabolic waveguide blocker 308 positioned adjacent to the waveguide core, wherein the parabolic waveguide blocker includes a parabolic shape having a surface exposed to an air-bearing surface (ABS) of a write head. The parabolic waveguide blocker reduces electromagnetic radiation from the waveguide core, recycles a scattering field emitted from the NFT to mitigate a thermal background in a recording medium, improves a thermal gradient, and increases an areal density capacity (ADC) of a hard disk drive write head.SELECTED DRAWING: Figure 3A

The present embodiments relate to a noble metal coating on a parabolic waveguide blocker surface to future improve thermal gradient for HAMR head which can provide an improved thermal spot confinement over other designs. More particularly, the present embodiments relate to a component in the near field transducer (NFT), made of a metallic parabolic shaped waveguide blocker (PWB) with noble metal coating on the PWB surface. The designs as described herein can include a noble metal coating (e.g., Au, Rh, Ir, Pt, Aluminum (Al), etc.) which can enable a plasmonic effect on the PWB surface for HAMR thermal gradient improvement.

To enable data to be satisfactorily recorded and / or reproduced when the data is recorded and / or reproduced while changing a head tilt angle during running of a magnetic tape after storing the magnetic tape.SOLUTION: A magnetic tape device is provided. An angle θ formed by the axis of the element array of a magnetic head with respect to the width direction of the magnetic tape is changed during running of the magnetic tape in the magnetic tape device. When a maximum value of an absolute value of a difference between a servo band spacing obtained before storage in a predetermined environment and a servo band spacing obtained after storage in the environment for a storage time T is defined as A and T is set to be a plurality of predetermined times, a medium life calculated by a linear function of A and a logarithm loge T of T, that are derived from a value of A and a value of the logarithm loge T of T obtained for each T is 5 years or longer. The medium life is T when A satisfies a prescribed formula.SELECTED DRAWING: None

The purpose of this disclosure is to provide a heat-assisted magnetic recording (HAMR) writer head with high magnetic field reliability and high accuracy. [Solution] Disclosed are a writer head for a heat-assisted magnetic recording device and a method for manufacturing a writer head. The writer head comprises a plurality of layers, including a waveguide cutoff layer, a waveguide layer, a near-field transducer layer, a heat sink layer, and a peg layer. Each layer has a tapered angle near the air bearing surface. The writer head further has a principal axis pole adjacent to an optical component having a similar tapered angle near the air bearing surface.

The embodiment of the invention discloses a read-write head device structure, a magnetic head, a magnetic storage device and electronic equipment. The read-write head device structure comprises a coil and a magnetic path which are stacked on a substrate layer, wherein the coil and the magnetic path are embedded in an insulating dielectric layer; the magnetic path comprises a first magnetic conductive layer and a second magnetic conductive layer, the first magnetic conductive layer is arranged close to the substrate layer, and the second magnetic conductive layer is located on the side, away from the substrate layer, of the first magnetic conductive layer; the coil is spirally wound on the first magnetic conductive layer or the second magnetic conductive layer and is wound layer by layer in the first extending direction of the first magnetic conductive layer or the second magnetic conductive layer. According to the arrangement, the three-dimensional space of the read-write head is fully utilized to form the coil structure, the coil is spirally wound between the first end and the second end of the first magnetic conductive layer or the second magnetic conductive layer, the size of the read-write head device in the extending direction of the read-write surface can be reduced, and the read-write efficiency is improved by improving the magnetic field write-in density and the read-write efficiency. Good magnetic storage performance can be obtained, and the use requirements of different data high-density storage scenes can be met.

The embodiment of the invention relates to a magnetic recording device. According to one embodiment, a magnetic recording apparatus includes: a disk-shaped recording medium; a magnetic head including a recording element, a light source, a light emitting element, and a sensor; and a controller including an inspection circuit that detects a height of a defect based on an output of the sensor, a memory that records the height of the defect, a setting circuit that sets the height of the defect on a track of the recording medium in which the defect is located with respect to a traveling direction of the magnetic head, and a light source control circuit that controls the light source to light the defect. And a light source control circuit that sets an upstream-side recording / reproduction prohibited sector on the upstream side of the defect and sets a downstream-side recording / reproduction prohibited sector on the downstream side of the defect, the downstream-side recording / reproduction prohibited sector having a longer length in the track direction than the upstream-side recording / reproduction prohibited sector, and that controls the output of the light source.

Nitrogen doping an insulating layer can lower the bandgap of a magnetic storage device. It is challenging to nitrogen dope magnesium oxide (MgO). A cation can be added to allow the magnesium to hold onto the nitrogen dopant without highly oxidizing or nitriding the cation. The resulting nitrogen doped MgXO, where X is the cation, has a lower bandgap compared to a much similar barrier layer that has neither nitrogen nor a cation thus improving thermal and electrical reliabilities. The nitrogen doped MgXO is non-stoichiometric whereas comparably, an oxynitride is stoichiometric. Example cations that may be used include aluminum, titanium, vanadium, chromium, and scandium.

A magnetic stack includes a magnetic recording structure and at least two heat-sink layers where heat-sink layer located furthest from the magnetic recording structure has thermal conductivity equal to or greater than intervening heat-sink layers. One or more interlayers can be included in the magnetic stack. Data storage devices and systems including one or more of the magnetic stacks, and related methods.

A magnetic recording head includes a piezoelectric actuator for controlling head-media spacing. A method for making the magnetic recording head including a piezoelectric actuator includes the steps of: providing a source wafer on which to fabricate the piezoelectric actuator; providing a target wafer; fabricating the piezoelectric actuator on the source wafer; releasing the piezoelectric actuator from the source wafer; and placing the piezoelectric actuator on the target wafer.

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.

The present disclosure generally relates to spintronic devices comprising a high oxidation resistive cap layer. The spintronic stack comprises a buffer layer, a topological material (TM) layer comprising YPtBi or BiSb, an interlayer, a ferromagnetic layer, and a cap layer. The cap layer comprises a high resistance material selected from the group consisting of: (1 ) lrxHfyAlz or lrxZryAlz, where x is between about 40 at. % to about 90 at. %, y is about 0.5 at. % to about 60 at. %, and z is about 0.5 at. % to about 60 at. %; (2) ZrQX or HfQX, where X and Q are each individually selected from the group consisting of: Ru, Co, Cu, Ir, Pt, Ti, Nb, Ni, RuAI, and CoFe; (3) SixAli-xN, TixAh-xN, CrxAli-xN, and ZrxAh-xN, where x is a numeral between 0.005 and 1; and (4) nitrides of Si, Al, Ti, Cr, and Zr.

Described are write head constructions that may be useful in magnetic recording, and in particular for heat-assisted magnetic recording. Such write head constructions include a heat channel abutted to the write pole to facilitate transferring heat away from the write pole and other components near the media-facing surface of the write head. To help prevent diffusion of materials between the heat channel and the write pole, a diffusion barrier layer is provided. Properties such as thermal expansion mismatch, the presence of oxide in the diffusion barrier layer, and so forth, may lead to undesired delamination of the heat channel during fabrication of the write head and / or during operation. In accordance with the present disclosure, an adhesion layer may be provided between the diffusion barrier layer and the heat channel to improve adhesion of the heat channel and effectively reduce delamination.

The present embodiments relate to a heat-assisted magnetic recording (HAMR) write head with a NFT bi-layer structure with a bottom taper, which can be applied to one or both layers of the two layers. A heat-assisted magnetic recording (HAMR) write head can include a main pole including a tip portion configured to interact with a magnetic recording medium at an air-bearing surface (ABS). The HAMR write head can further include a near-field transducer (NFT) that includes a dielectric waveguide, a plasmon generator (PG) layer, and a second layer. The second layer can include a thermo-mechanically stable material disposed adjacent to the PG layer. Further, the PG layer and the second layer can form a taper angle relative to the ABS ranging between 30 and 60 degrees.

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.

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.

The present embodiments relate to a noble metal coating on a parabolic waveguide blocker surface to future improve thermal gradient for HAMR head which can provide an improved thermal spot confinement over other designs. More particularly, the present embodiments relate to a component in the near field transducer (NFT), made of a metallic parabolic shaped waveguide blocker (PWB) with noble metal coating on the PWB surface. The designs as described herein can include a noble metal coating (e.g., Au, Rh, Ir, Pt, Aluminum (Al), etc.) which can enable a plasmonic effect on the PWB surface for HAMR thermal gradient improvement.

The present disclosure generally relates to spin-orbit torque (SOT) magnetic tunnel junction (MTJ) devices comprising a doped bismuth antimony (BiSbE) layer having a (012) orientation. The devices may include magnetic write heads, read heads, or MRAM devices. The dopant in the BiSbE layer enhances the (012) orientation. The BiSbE layer may be formed on a texturing layer to ensure the (012) orientation, and a migration barrier may be formed over the BiSbE layer to ensure the antimony does not migrate through the structure and contaminate other layers. A buffer layer and interlayer may also be present. The buffer layer and the interlayer may each independently be a single layer of material or a multilayer of material. The buffer layer and the interlayer inhibit antimony (Sb) migration within the doped BiSbE layer and enhance uniformity of the doped BiSbE layer while further promoting the (012) orientation of the doped BiSbE layer.

The spot size converter (SSC) in the HAMR magnetic recording head assembly has multiple split-assist core structures. Each split-assist core structure includes multiple assist cores and a main waveguide. Each split core may also include one or more side waveguides, where the main waveguide is sandwiched between the side waveguides and between the top and bottom assist cores. Adjacent split-assist core structures may share an assist core. The split-assist core structure reduces the light source power used to write data to the magnetic media.

A magnetic stack includes a magnetic recording structure and at least two heat-sink layers where heat-sink layer located furthest from the magnetic recording structure has thermal conductivity equal to or greater than intervening heat-sink layers. One or more interlayers can be included in the magnetic stack. Data storage devices and systems including one or more of the magnetic stacks, and related methods.

To provide a magnetic recording head, a design method thereof, and a magnetic recording device that provide thermally activated protection against media damage during dynamic events such as operational shocks, load / unload processes, and emergency power-off.SOLUTION: A perpendicular magnetic recording (PMR) read / write transducer head for heat-assisted magnetic recording (HAMR) includes active nano bumper pads formed from thermally activated dynamic flying height (DFH) bulges that protrude closely on either side of the read / write element, and these bumper pads, which can be multiple, are arranged around the perimeter of he transducer head to absorb the heat generated by active heating element, including the write current. When this energy is absorbed, the bulges expand and change shape, protruding closely outward from the slider air bearing surface (ABS), protecting the read / write head from intentional and unintentional touchdowns.SELECTED DRAWING: None

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.

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