45results about "Combination recording" patented technology

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.

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 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.

Provided are arrangements of optical elements that combine the features of a high power, compact laser that exhibits narrow linewidth output and that does not appreciably shift in wavelength or vary in power over a wide range of temperatures. Such arrangements include a transmission filter and a Bragg reflector that select out the wavelength for which the output power of a reflective semiconductor optical amplifier (RSOA) is least affected by changes in temperature over a temperature range of interest. Such arrangements may also utilize temperature-insensitive 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.

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 relates to the pretreatment of a magnetic recording head assembly for a magnetic media drive. The magnetic recording head assembly comprises a slider with a media-side surface (MFS), an upper surface opposite the MFS, a trailing-edge surface adjacent to the upper surface, and an optical grating arranged on the trailing-edge surface. A vertical resonator surface-emitting laser device (VCSEL device) is mounted on the trailing-edge surface of the slider. The VCSEL device is aligned with the optical grating. A magnetic recording head, comprising a waveguide and a near-field transducer (NFT) coupled to the waveguide, is arranged on the trailing-edge surface of the slider. The VCSEL device is capable of emitting a plurality of phase-coherent lasers onto the optical grating.The optical grating is capable of directing the emitted laser beams at approximately 90 degrees to the waveguide.

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.

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 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.

The present disclosure describes a magnetic recording apparatus that provides thermally assisted reading of data from a magnetic recording medium. A magnetic recording medium configured to facilitate the thermally assisted reading is also described. The magnetic recording medium includes a ferrimagnetic capping layer over a magnetic recording layer, wherein the capping layer is configured to enhance a magnetic field emanating from the magnetic recording layer during a read operation or process. The ferromagnetic capping layer may include at least one rare earth metal and at least one transition metal, and in an illustrative example, the ferromagnetic capping layer includes TbFeCo. The magnetic recording medium may also include additional layers, such as a cushion layer (SUL) and a heat sink layer. The magnetic recording device may include both a thermally assisted read head and a thermally assisted write head. The SUL is configured to provide a return path for the magnetic flux during read and write operations.

Maintains good write characteristics in a heat-assisted magnetic recording and playback device. [Solution] According to the embodiment, the adjustment method for a heat-assisted magnetic recording and playback device is an adjustment method for a heat-assisted magnetic recording and playback device equipped with a heat-assisted magnetic recording head and a heat-assisted magnetic recording medium, wherein the bit density in the starting area of ​​the recording band and in each area storing information other than user data is changed to be lower than the bit density of the areas other than the starting area in order to improve the write characteristics.

Embodiments of the present disclosure generally relate to a vertical cavity surface emitting laser, a head gimbal assembly for mounting a vertical cavity surface emitting laser, and devices incorporating such articles. In an embodiment, a vertical cavity surface emitting laser (VCSEL) device is provided. The VCSEL device includes a chip for mounting on a slider and two laser diode electrodes. The chip has six surfaces, wherein a first surface of the chip is for facing the slider, a second surface of the chip is opposite the first surface, and the two laser diode electrodes are positioned in any combination on one or more of a third surface, a fourth surface, a fifth surface, or a sixth surface of the chip.

A heat-assisted magnetic head includes a head slider having a head slider substrate and a head portion, and a light source unit having a laser diode and a sub-mount. The head portion includes a media facing surface, a light source facing surface, and a head slider leading end surface. The sub-mount includes a connection end surface and a mounting leading end surface, and the laser diode includes an electrode surface and an LD leading end surface. The light source unit includes a shift connection structure, the laser diode is joined to a shifted region of the connection end surface, and the light source unit is mounted on the head slider substrate with the electrode surface intersecting a lamination surface of the head portion. The shifted region is disposed in a shifted position such that the LD leading end surface is further from the head slider leading end surface than the mounting leading end surface.

The present invention relates to a magnetic recording head assembly for a magnetic media drive. The magnetic recording head assembly includes a slider having a medium-facing surface (MFS), a top surface opposite the MFS, a trailing surface adjacent to the top surface, and an optical grating disposed on the trailing surface. A vertical-cavity surface-emitting laser (VCSEL) device is attached to the trailing surface of the slider. The VCSEL device is aligned with the optical grating. A magnetic recording head including a waveguide and a near-field transducer (NFT) coupled to the waveguide is disposed on the trailing surface of the slider. The VCSEL device can emit multiple phase-coherent laser beams onto the optical grating. The optical grating can direct the emitted laser beams at approximately 90 degrees relative to the waveguide.

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.

The present disclosure generally relates to a magnetic recording head for a magnetic media driver. The magnetic recording head includes: a main pole; a waveguide disposed adjacent to the main pole; a near field transducer (NFT) coupled between the main pole and the waveguide at a media facing surface (MFS); a thermal diverter disposed on the NFT, the thermal diverter being recessed relative to the MFS; and a stabilizing material, the stabilizing material being disposed on the NFT at the MFS. In some embodiments, the stabilizing material is wedge-shaped or triangular. In another embodiment, the stabilizing material includes a first portion and a second portion, where the first portion and the second portion may each be linear, or where the first portion is triangular and the second portion is square. The stabilizing material can be in contact with, or spaced apart from, the thermal diverter.

The present disclosure generally relates to a magnetic recording head for a magnetic media driver. The magnetic recording head includes: 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 diverter disposed on the NFT, the thermal diverter being recessed from the MFS; and a stabilizing material, the stabilizing material being disposed between the NFT and the MFS. The stabilizing material is spaced apart from the thermal splitter, and the stabilizing material and the NFT comprise different materials. In some embodiments, a surface of the stabilizing material facing the waveguide is tapered. The stabilizing material may include two or more layers, the two or more layers including different materials.

Writer head products for heat-assisted magnetic recording devices and methods of making the same are disclosed. The writer heads include multiple layers including a waveguide blocking layer, a waveguide layer, a near-field transducer layer, a heat sink layer, and a peg layer. The peg layer may comprise a small triangular section that extends from an air-bearing surface into the optical component. The writer heads further include a main magnetic pole adjacent to the optical component.

To provide an information processing device for self-learning that can store various phenomena using a periodic structure or a loop.SOLUTION: An information processing device for self-learning (100) includes a container (120), a gelatinous material placed in the container, and a plurality of antennas (111) positioned around the container and generating electromagnetic fields corresponding to input data.SELECTED DRAWING: Figure 2

Spot size converters (SSCs) in a HAMR magnetic recording head assembly comprise a plurality of split auxiliary core structures. Each split auxiliary core structure includes multiple auxiliary cores and a main waveguide. Each split core may also include one or more side waveguides, such that the main waveguide lies between the side waveguides and the top and bottom auxiliary cores. Adjacent split auxiliary core structures may share auxiliary cores. The split auxiliary core structures reduce the light source power used to write data to magnetic media.

A method and apparatus for synchronizing audio streamed over a network. The system makes use of a reference track and a common clock that is provided by a server to all participating performers. The performers perform along with and to the reference track wherein the reference track and common clock serve as a baseline reference for all the performers in regard to their audio transmitted to the server. Using the reference track and common clock, the server of the system can reconstruct and synchronize received audio from all the participating performers. The synchronized audio is then provided to a mixer where it is combined and live or real-time adjustments to the audio are made before being provided for broadcast.

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.

The present disclosure relates to pretreating a magnetic recording head assembly for magnetic media drive. The magnetic recording head assembly comprises a slider having a media facing surface (MFS), a top surface disposed opposite the MFS, a trailing edge surface disposed adjacent to the top surface, and an optical grating disposed on the trailing edge surface. A vertical cavity surface emitting laser (VCSEL) device is mounted to the trailing edge surface of the slider. The VCSEL device is aligned with the optical grating. A magnetic recording head comprising a waveguide having a grating pattern and a light output pattern. The light output pattern can output in-phase or out-of-phase light. The grating pattern aligns with the optical grating and comprises a plurality of grating bumps. The grating bumps may comprise a high index material, and may have different dimensions.

Various illustrative aspects are directed to a data storage device comprising a disk, a read / write head configured to read data from and write data to the disk, a laser diode (LD) coupled to a near field transducer (NFT) configured to heat an area of the disk near the read / write head, an asymmetric LD driver configured to drive the LD, and one or more processing devices configured to: preheat the LD to a target temperature, wherein the preheating comprises: generating at least one bias pulse conforming to one or more tunable parameters, based at least in part on the target temperature; and applying, using the asymmetric LD driver, the at least one bias pulse to the LD such that no optical response is produced by the LD; and initiate a write operation for writing data to the disk.

The invention relates to pre-processing a magnetic recording head assembly for a magnetic media driver. The magnetic recording head assembly includes a slider having a media facing surface (MFS), a top surface disposed opposite the MFS, a trailing edge surface disposed adjacent the top surface, and a grating disposed on the trailing edge surface. A vertical cavity surface emitting laser (VCSEL) device is mounted to the trailing edge surface of the slider. The VCSEL device is aligned with the grating. A magnetic recording head including a waveguide and a near field transducer (NFT) coupled to the waveguide is disposed on the trailing edge surface of the slider. The VCSEL device is capable of emitting a plurality of phase-coherent lasers onto the grating. The grating is capable of directing the emitted laser light to the waveguide at about 90 degrees.

A heat assisted magnetic recording (HAMR) write head contains a main pole, a waveguide, and a near-field transducer containing an antenna disposed between the waveguide and the main pole. A first portion of the antenna includes a layer stack of three or more gold-based component layers that contain a waveguide-side outermost gold-based component layer, a pole-side outermost gold-based component layer, and one or more intermediate gold-based component layers. An intermediate gold-based component layer of the one or more intermediate gold-based component layers includes at least one platinum group metal (PGM) at a maximum total atomic percentage that is greater than a total atomic percentage of the at least one PGM in the waveguide-side outermost gold-based component layer and is greater than a total atomic percentage of the at least one PGM in the pole-side outermost gold-based component layer.

The embodiment of the invention relates to a heat-assisted magnetic recording and reproducing apparatus and an adjusting method thereof. According to an embodiment, a method for adjusting a heat-assisted magnetic recording / reproducing device is a method for adjusting a heat-assisted magnetic recording / reproducing device equipped with a heat-assisted magnetic recording head and a heat-assisted magnetic recording medium. Write characteristics are improved by changing the bit density in a start region of a shingled tape and each region in which information other than user data is stored so as to be lower than the bit density in a region other than the start region.

A heat‑assisted magnetic recording (HAMR) disk drive uses a semiconductor laser mounted on a slider to deliver light to a near-field transducer (NFT) via a waveguide located inside the slider. The waveguide includes a core and cladding material that is transparent to the laser light and surrounds the core. Layers of stray light absorption material are located inside the slider on opposite edges of the waveguide core in the same plane as the core and on opposite sides of the waveguide core in planes spaced from the plane of the core. Portions of the waveguide cladding material are located between the waveguide core and the stray light absorption layers. The stray light absorption layers absorb light that leaks into the cladding material and substantially reduces stray light reflected to the laser to prevent undesirable laser power fluctuation.