38results about "Arm with optical waveguide" patented technology

A lubricant including a plurality of segments including a divalent center segment and two sidechain segments, each including a perfluoroalkyl ether moieties is provided in which a dewetting thickness of the lubricant may be determined based in-part on a segment weight average molecular weight of the segments. A magnetic recording medium and a magnetic data storage system including the lubricant are also provided.

Single-transverse-mode laser diodes that include a bowtie-shaped ridge waveguide. Related apparatuses, data storage devices, computing systems, and methods.

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.

The invention discloses a light source unit which is applied to a heat-assisted magnetic head, a welding layer and a stop structure are arranged between a sliding block of the heat-assisted magnetic head and the light source unit, and when the light source unit is connected with the sliding block, the light source unit can move along with melting of the welding layer and is accurately limited at a preset position by the stop structure. The emission port of the light source unit can be accurately aligned with the waveguide, so that the optical coupling efficiency between the light source unit and the waveguide is improved. Meanwhile, the embodiment of the invention also correspondingly provides a heat-assisted magnetic head, a magnetic head gimbal assembly and a hard disk drive.

A method comprising the steps of forming a recording head comprising a waveguide, a heat sink and a bleed resistor on a first substrate, is described. The bleed resistor is coupled to the heat sink and the substrate. The top surface of the heat sink is planarized to form a planarized heat sink. A laser diode formed on a second substrate is transfer printed onto the planarized heat sink to form an integrated laser diode.

Embodiments of the present invention relate to a disc device, which includes a first conversion device, a second conversion device, an optical waveguide, a first component, and a second component. The first conversion device emits light corresponding to an electrical signal. The second conversion device generates an electrical signal corresponding to the incident light. The optical waveguide has a first end joined to the first conversion device and a second end joined to the second conversion device, and transmits the light emitted by the first conversion device to the second conversion device. The first component is electrically connected to the first conversion device. The second component is electrically connected to the second conversion device and communicates with the first component through the first conversion device, the optical waveguide, and the second conversion device.

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 disclosure disclose a light source unit applied to the thermally assisted magnetic head. A welding layer and a stopping structure are disposed between the slider of the thermally assisted magnetic head and the light source unit. When the light source unit is joined with the slider, the light source unit moves as the welding layer melts and can be precisely limited at the preset position by the stopping structure. In this way, the emission opening of the light source unit and the waveguide can be aligned precisely, thereby increasing the optical coupling efficiency between the light source unit and the waveguide. Meanwhile, the embodiment of the disclosure further accordingly provides a thermally assisted magnetic head, a head gimbal assembly, and a hard disk drive.

Disclosed are methods and assemblies used to optically communicate signals within a hard disk drive between controller electronics and recording heads. One or more transceivers in a fixed location can be used to communicate with one or more transceivers positioned on a moveable actuator and coupled to the recording heads. The use of linear motion actuators can help preserve line-of-sight optical communication between the transceivers.

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.

To provide a disk device capable of suppressing oxygen consumption inside the device and improving reliability.SOLUTION: According to one embodiment, a disk device comprises a housing in which a low-density gas containing oxygen and having a density lower than that of air is sealed, a disk-shaped recording medium rotatably provided in the housing, a spindle motor provided in the housing and supporting and rotating the recording medium, and a magnetic head including a thermal assist element for heating the recording medium. The surface of the magnet of the spindle motor is covered with a shielding film for shielding oxygen permeation.SELECTED DRAWING: Figure 3

The disclosure disclose a light source unit applied to the thermally assisted magnetic head. A welding layer and a stopping structure are disposed between the slider of the thermally assisted magnetic head and the light source unit. When the light source unit is joined with the slider, the light source unit moves as the welding layer melts and can be precisely limited at the preset position by the stopping structure. In this way, the emission opening of the light source unit and the waveguide can be aligned precisely, thereby increasing the optical coupling efficiency between the light source unit and the waveguide. Meanwhile, the embodiment of the disclosure further accordingly provides a thermally assisted magnetic head, a head gimbal assembly, and a hard disk drive.

The invention is entitled "VCSEL array for HAMR." The present disclosure relates to the pre-processing of a magnetic recording head for a magnetic media drive. For a heat-assisted magnetic recording (HAMR) head, an optical source provides the heat necessary for the drive operation. A vertical cavity surface emitting laser (VCSEL) is mounted to the top surface of the slider. A plurality of laser beams are emitted from the bottom surface of the VCSEL and are directed to a corresponding number of waveguide structures within the HAMR head. The waveguide structures feed into a multimode interference (MMI) device which then directs the laser light into a single waveguide to be focused on a near-field transducer (NFT). The VCSEL laser is phase coherent and does not have mode hopping.

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.

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 spot size converter (SSC) in a HAMR magnetic recording head assembly has a plurality of separate auxiliary core structures. Each split auxiliary core structure includes a plurality of auxiliary cores and a main waveguide. Each split core may also include one or more side waveguides such that the main waveguide is sandwiched between the side waveguides and the top and bottom auxiliary cores. Adjacent separate auxiliary core structures may share an auxiliary core. The split auxiliary core structure reduces the light source power used to write data to the magnetic medium.

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.

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. Each of the layers may comprise a tapered angle near an air-bearing surface. The writer heads further include a main magnetic pole adjacent to the optical component including the same tapered angle near the air-bearing surface.

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.

A near-field transducer for an energy-assisted, magnetic recording head includes a first part comprising a first plasmonic material. The first part has an enlarged portion configured to receive optical energy from a waveguide and a narrowed portion that receives and channels the optical energy to a recording medium. The near-field transducer includes a second part comprising a nanorod of a second plasmonic material different than the first plasmonic material. The nanorod is disposed within the first part along a light propagation direction of the near-field transducer and extends to a media-facing surface of the recording head along a light propagation direction. The narrowed portion of the first part covers at least three sides of the nanorod along the light propagation direction. The nanorod has an exposed end that is exposed from the near-field transducer and faces the media-facing surface.

A light source unit, a heat-assisted magnetic head, a head gimbal assembly, and a hard disk drive. A light source unit includes a laser diode and a base to which the laser diode is joined. The laser diode includes a light generating layer including an active layer that emits laser light and a clad layer formed to sandwich the active layer. The active layer includes a quantum dot layer including a plurality of quantum dots having a characteristic of individually restricting movement of a carrier in three-dimensional directions.

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.

To provide improved thermal spot confinement in a heat assisted magnetic recording (HAMR) write head.SOLUTION: The HAMR write head 400 comprises a main pole 402, a wave guide core 410, bi-layer transducers disposed between the main pole 402 and the wave guide core 410, a dielectric spacer layer disposed adjacent to the wave guide core 410, parabolic wave guide blockers (PWBs) 416, and a noble metal layer 414 disposed between the PWB416 and the dielectric spacer layer, wherein the noble metal layer 414 is 20-100 nanometers thick and comprises any of ruthenium (Ru), iridium (Ir), platinum (Pt), gold (Au) and alloys thereof.SELECTED DRAWING: Figure 4

The embodiment of the invention relates to a disk device. According to one embodiment, the disk device includes: a housing in which a low-density gas containing oxygen and having a lower density than air is sealed; a disc-shaped recording medium provided in the case so as to be rotatable; a spindle motor which is provided in the housing, supports the recording medium, and rotates the recording medium; and a magnetic head including a thermal assist element that heats the recording medium. The surface of the magnet of the spindle motor is covered by a shielding film which blocks the transmission of oxygen.

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.