Entries |
Document | Title | Date |
20090196128 | THERMALLY ASSISTED RECORDING SYSTEMS WITH LOW LOSS LIGHT REDIRECTION STRUCTURE - A system according to one embodiment comprises a slider having a first light channel and a second light channel, the first and second light channels having axes oriented at an angle relative to each other, the angle being less than 180 degrees; and a reflection portion adjacent an exit of the first light channel and an entrance to the second light channel, the reflection portion having an index of refraction that is different than an index of refraction of the first light channel, such that light from the first light channel is reflected into the second light channel. Additional systems and methods are provided. | 08-06-2009 |
20090219790 | MAGNETO OPTICAL DEVICE - In a magneto optical device is which a laser beam is shone in operation through a coil ( | 09-03-2009 |
20100074063 | SYSTEM TO DELIVER LIGHT TO A SLIDER FOR HEAT-ASSISTED RECORDING - In a particular embodiment, a recording head includes a tapered waveguide adapted to propagate light from a light source a slider adjacent to a surface of a storage medium. The tapered waveguide is adapted to output an elliptical beam to a grating coupler on a slider. The recording head further includes a slider waveguide extending substantially normal to a surface of the storage medium and a grating adapted to couple the elliptical beam into the slider waveguide. | 03-25-2010 |
20100128579 | Sloped Pole For Recording Head With Waveguide - An apparatus having a first pole with a first side and a second side opposite from the first side, a second pole positioned on the first side of the first pole, and a waveguide positioned on the second side of the first pole wherein the waveguide has an end adjacent to an air bearing surface. The first pole includes a first portion spaced from the waveguide and a second portion extending from the first portion to the air bearing surface, with the second portion being structured such that an end of the second portion is closer to the waveguide than the first portion. | 05-27-2010 |
20110122738 | INFORMATION RECORDING AND REPRODUCTION APPARATUS - The present invention relates to an information recording and reproduction apparatus which records the information on a disk by heating the disk with near-field light and causing magnetization reversal by applying a recording magnetic field to the disk. An optical waveguide | 05-26-2011 |
20110128829 | Optical Recording Head And Optical Recording Apparatus - An optical recording head to record information onto a recording medium utilizing light including; a slider provided to move relatively to the recording medium; a light propagation element provided on a side surface of the slider substantially vertical against a recording surface of the recording medium so as to cause propagation of light incident with a predetermined angle to be irradiated on the recording medium; and, a prism provided on the light propagation element so as to oppose to the side surface of the slider having the light propagation element and to deflect the incident light to be incident into the light propagation element with a predetermined angle. | 06-02-2011 |
20110188354 | HEAT-ASSISTED MAGNETIC RECORDING HEAD WITH CONVERGENT LENS - A heat-assisted magnetic recording head includes a magnetic pole, a waveguide that allows light to propagate therethrough, a near-field light generating element that generates near-field light based on the light propagating through the waveguide, a convergent lens, and a laser diode disposed above the waveguide. The convergent lens transmits light that is emitted from the laser diode, so that the light transmitted through the convergent lens is incident on the waveguide. | 08-04-2011 |
20110205862 | THERMALLY ASSISTED MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING STORAGE - Disclosed is a thermally assisted magnetic recording medium comprising a substrate, a plurality of underlayers formed on the substrate, and a magnetic layer which is formed on the underlayers and predominantly comprised of an alloy having a L1 | 08-25-2011 |
20110228653 | LIGHT SOURCE UNIT FOR THERMALLY-ASSISTED MAGNETIC RECORDING CAPABLE OF MONITORING OF LIGHT OUTPUT - Provided is a light source unit that is to be joined to a slider to form a thermally-assisted magnetic recording head. The light source unit comprises: a unit substrate having a source-installation surface; a light source provided in the source-installation surface and emitting thermal-assist light; and a photodetector bonded to a rear joining surface of the unit substrate in such a manner that a rear light-emission center of the light source is covered with a light-receiving surface of the photodetector. The photodetector can be sufficiently close to the light source; thus, constant feedback adjustment with high efficiency for the light output of the light source can be performed. This adjustment enables light output from the light source to be controlled in response to changes in light output due to surroundings and to changes with time to stabilize the intensity of light with which a magnetic recording medium is irradiated. | 09-22-2011 |
20110235479 | THERMALLY ASSISTED MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING STORAGE - Disclosed is a thermally assisted magnetic recording medium comprising a substrate, a plurality of underlayers formed on the substrate, and a magnetic layer which is formed on the underlayers and predominantly comprised of an alloy having an L1 | 09-29-2011 |
20110267930 | Method and Apparatus for Aligning a Laser Diode on a Slider - An apparatus includes a structure including a waveguide and a pocket adjacent to an input facet of the waveguide. A laser has an output facet and is positioned in the pocket. A stop is included one at least one of the laser and a wall of the pocket. The stop is positioned at an interface between the laser and the wall of the pocket such that the output facet of the laser and the input facet of the waveguide are separated by a gap. | 11-03-2011 |
20120020195 | Transducer Assembly For Light Delivery - An apparatus having a transducer assembly that includes a waveguide having first and second cladding layers and a core layer between the first and second cladding layers, and a grating structured to couple electromagnetic radiation into the waveguide. The grating has a plurality of elongated slits that are substantially parallel to a longitudinal axis of the waveguide. The apparatus further has a light source mounted adjacent the waveguide to direct light onto the grating. | 01-26-2012 |
20120044790 | HEAD GIMBAL ASSEMBLY WITH TWO WIRING LAYERS COMPRISING THERMALLY-ASSISTED HEAD - Provided is a head gimbal assembly (HGA) in which the electrodes for a thermally-assisted magnetic recording head comprising a light source, a photodetector and a magnetic head element, can be reliably electrically connected to wiring members by solder ball bonding (SBB). The HGA comprises a suspension comprising: a base; a first wiring member for the light source and the photodetector, provided on a side of one surface of the base; and a second wiring member for the magnetic head element, provided on the same surface side. The first and second wiring members protrude from the base toward the head to be fixed. As a result, the end portions (connection pads) of the first and second wiring members can be located close to electrodes for light-source and photodetector and electrodes for magnetic head element, respectively. This arrangement enables the end portions of the first and second wiring members to be reliably electrically connected to the electrodes by SBB. | 02-23-2012 |
20120057440 | Grating For VCSEL Coupling To A Heat Assisted Magnetic Recording Head - An apparatus includes a waveguide including a core layer having curved edges shaped to reflect light to a focal point, and a grating positioned adjacent to or imbedded in the core layer, wherein at least a portion of the grating is positioned between the curved edges and adjacent to or imbedded in a portion of the core layer that is not traversed by light reflected from the curved edges. A data storage device that includes the apparatus is also provided. | 03-08-2012 |
20120092973 | LIGHT SPOT FORMING ELEMENT, OPTICAL RECORDING HEAD, AND OPTICAL RECORDING DEVICE - Disclosed is a light spot forming element which is capable of forming a minute stabilized light spot efficiently and is easy to handle. For this purpose, there is provided a light spot forming element wherein a laser oscillation unit which has a periodic refractive index distribution and is employed as a laser resonator, and a focusing unit that receives the light emitted by this laser oscillation unit and forms a light spot by focusing this received light are formed on the same substrate. | 04-19-2012 |
20120099407 | METHOD AND APPARATUS FOR COUPLING A LASER DIODE TO A MAGNETIC WRITER - A write head includes a cavity configured to couple a laser diode to the write head. A bottom of the cavity includes a heat conductive element configured to contact the laser diode, a plurality of thermal studs disposed below the heat conductive element, and a substrate disposed below the thermal studs. The heat conductive element, thermal studs, and substrate are thermally coupled to draw heat from the laser diode. | 04-26-2012 |
20120113769 | Recording head, method of manufacturing recording head, and information recording and playback apparatus - A near-field light generating element has a core that guides a laser light in a direction of a disk while reflecting the laser light, and a cladding that encapsulates the core in an inner portion, and lengths of a longitudinal direction and a transverse direction of an incident side end surface of the laser light in the core are formed so as to match the lengths of a long axis direction and a short axis direction of the laser light that is entered to the core. | 05-10-2012 |
20120127838 | THERMALLY-ASSISTED MAGNETIC RECORDING HEAD - A thermally assisted magnetic recording head includes a magnetic recording element part for writing, a main waveguide for assistance for receiving light, and a dummy waveguide component part provided in parallel to the main waveguide. The dummy waveguide component part includes a pair of waveguides having the same shape and dimensions including a first waveguide and a second waveguide that receive light from a back end surface opposite to an air bearing surface and guides the light toward the air bearing surface, and light emitting ends of the first waveguide and the second waveguide facing towards the air bearing surface have no shielding material, and are in a free condition so that the light intensity from the light emitting ends can be measured. | 05-24-2012 |
20120230168 | HEAT-ASSISTED MAGNETIC WRITE HEAD, HEAD GIMBALS ASSEMBLY, HEAD ARM ASSEMBLY, AND MAGNETIC DISK DEVICE - A heat-assisted magnetic write head includes a magnetic pole having an end surface exposed at an air bearing surface, a waveguide extending toward the air bearing surface to propagate light, a first pair of clads made of a first dielectric material having a refractive index lower than that of the waveguide, and sandwiching the waveguide in a track width direction, and a second pair of clads made of a second dielectric material having a refractive index lower than that of the first dielectric material, and sandwiching the waveguide in a thickness direction orthogonal to the track width direction. Further, the heat-assisted magnetic write head may include, between the magnetic pole and the waveguide, a plasmon generator generating near-field light from the air bearing surface, based on light propagating through the waveguide. | 09-13-2012 |
20120263024 | Heat assisted narrow pole design with trailing shield - A TAMR (Thermal Assisted Magnetic Recording) writer has a narrow pole tip with a trailing edge magnetic shield. The narrow pole tipped write head uses the energy of laser generated edge plasmons, formed in a plasmon generating layer, to locally heat a PMR magnetic recording medium below its Curie temperature, Tc. When combined with the effects of the narrow tip, this local heating to a temperature below Tc is sufficient to create good transitions and narrow track widths in the magnetic medium. The write head is capable of writing effectively on state-of-the-art PMR recording media having Hk of 20 kOe or more. | 10-18-2012 |
20120300600 | THERMALLY ASSISTED MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING AND REPRODUCING DEVICE - A thermally assisted magnetic recording medium having a structure in which a first magnetic layer | 11-29-2012 |
20120307605 | Thermally Assisted Magnetic Recording Head Inspection Method and Apparatus - In a method and an apparatus for inspecting a thermally assisted magnetic recording head element, a specimen is mounted on a table movable in a plane of a scanning probe microscope device, evanescent light is generated from a portion of light emission of evanescent light of the specimen, scattered light of the evanescent light is detected by moving the table in the plane while a cantilever of the scanning probe microscope having a probe is vertically vibrated in the vicinity of a surface of the specimen, and an intensity distribution of the evanescent light emitted from the portion of light emission of evanescent light or a surface profile of the portion of light emission of evanescent light of the specimen is inspected using position information of generation of the evanescent light based on the detected scattered light. | 12-06-2012 |
20130028061 | SHINGLED-WRITING THERMAL ASSISTANCE RECORDING (TAR) DISK DRIVE WITH AVOIDANCE OF ADJACENT TRACK ERASURE FROM A WIDE-AREA HEATER - A thermally-assisted recording (TAR) disk drive that uses “shingled” recording and a rectangular waveguide as a “wide-area” heat source includes a controller that counts the number of writes to each annular band of data tracks. The wide-area heater generates a heat spot that extends across multiple tracks, so that each time an annular band is written, the data in tracks in adjacent bands are also heated. Because the bands are written independently, the number of passes of the heat spot and thereby the number of times the data tracks in a band are exposed to elevated temperatures without being re-written is related to the number of re-writes of the adjacent bands. The number of writes to each band is counted and when that count reaches a predetermined threshold value, one or more tracks in an adjacent band are re-written to avoid reaching an unacceptable level of magnetization decay in the tracks of the adjacent band. | 01-31-2013 |
20130088944 | Heat-Assisted Magnetic Recording Head for Servo Writing - An apparatus includes a write pole, a waveguide adjacent to the write pole, the waveguide having a truncated end, and a blocking layer positioned adjacent the truncated end and extending from one side of the waveguide across a portion of an aperture at the truncated end. The waveguide can be a solid immersion minor or a channel waveguide. | 04-11-2013 |
20130107678 | APPARATUS AND METHOD FOR INSPECTING THERMALLY ASSISTED MAGNETIC HEAD | 05-02-2013 |
20130107679 | HEAT ASSISTED MAGNETIC RECORDING DEVICES | 05-02-2013 |
20130107680 | TAR TEMPERATURE SENSOR HAVING FASTER RESPONSE TIME | 05-02-2013 |
20130121121 | RECORDING HEAD WITH WAVEGUIDE - An apparatus having a first pole with a first side and a second side opposite from the first side, a second pole positioned on the first side of the first pole, and a waveguide positioned on the second side of the first pole wherein the waveguide has an end adjacent to an air bearing surface. The first pole includes a first portion spaced from the waveguide and a second portion extending from the first portion to the air bearing surface, with the second portion being structured such that an end of the second portion is closer to the waveguide than the first portion. | 05-16-2013 |
20130176839 | LIGHT DELIVERY GUIDE - A waveguide that includes a first cladding layer, the first cladding layer having an index of refraction, n | 07-11-2013 |
20130250742 | THERMALLY-ASSISTED MAGNETIC RECORDING HEAD, HEAD GIMBALS ASSEMBLY, HEAD ARM ASSEMBLY, MAGNETIC DISK UNIT, AND LIGHT TRANSMISSION UNIT - The thermally-assisted magnetic recording head includes: a laser light source having an emission surface, the emission surface allowing laser light to be emitted therefrom; a waveguide having a core and a cladding, the core allowing the laser light emitted from the laser light source to propagate therethrough, and the cladding surrounding the core; a magnetic pole; and a plasmon generator. Each of the core and the cladding has an end surface facing the emission surface, and the end surface of the cladding suppresses returning of the laser light to the laser light source. | 09-26-2013 |
20130258823 | LIGHT SOURCE CHIP AND A THERMALLY ASSISTED HEAD WITH THE SAME, AND MANUFACTURING METHODS THEREOF - A manufacturing method of a light source chip for a thermally assisted head comprises steps of (a) providing a light source bar with a surface coating formed thereon; (b) forming several blind holes on the predetermined positions of the light source bar by etching, the blind hole having a top hollowed on the surface coating and a bottom hollowed on the light source bar, and the blind hole having a first biggest width at its top; (c) cutting the light source bar along every two adjacent blind holes by a cutting machine The cutting machine has a cutting means with a second biggest width that is smaller than the first biggest width of the blind hole, thereby cutting down an individual light source chip without contacting the side edges of the blind hole. Thus a light source chip with a smooth edge and without cracks on the surface can be obtained; and the surface coating formed thereon is hard to be peeled off. | 10-03-2013 |
20130265860 | Multi-Layer Recording Lamination for Solid Immersion Mirror Servo Track Writing - A data storage media may have at least a multi-layer recording lamination with a predetermined coercivity. The multi-layer recording lamination can be configured to record at least one servo format mark for a plurality of data tracks with a solid immersion mirror and program a data bit on the multi-layer recording lamination with a near field transducer. | 10-10-2013 |
20130286803 | TRACE-GIMBAL ASSEMBLY WITH EXTENSION THAT PREVENTS CONTACT BETWEEN SOLDER JOINTS - An apparatus has a slider body that includes an upper surface opposed to a media-facing surface. The slider body has an edge joined between the media-facing surface and the upper surface and facing a coupling region. The slider body includes a first bond pad on the edge and a laser submount coupled to the upper surface of the slider body. The laser submount has a second bond pad facing the coupling region. The apparatus includes a trace-gimbal assembly having first and second electrical traces facing the coupling region and electrically coupled to the respective first and second bond pad via first and second solder joints. An extension of the trace-gimbal assembly extends between the first and second solder joints preventing contact therebetween. | 10-31-2013 |
20140029398 | SUSPENSION BOARD WITH CIRCUIT - A suspension board with circuit includes a conductive pattern, including a slider arranged on a surface side of the suspension board with circuit and mounted with a magnetic head, the magnetic head being electrically connected with the conductive pattern; and a light emitting device arranged on the back surface side of the suspension board with circuit and electrically connected with the conductive pattern, in which the conductive pattern includes a first terminal provided on a surface of the suspension board with circuit and electrically connected with the magnetic head; and a second terminal provided on the back surface of the suspension board with circuit and electrically connected with the light emitting device. | 01-30-2014 |
20140119164 | Laser Power Control in a Heat-Assisted Magnetic Recording System - A heat-assisted magnetic recording system may include, but is not limited to: at least one magnetic recording read/write head; at least one laser diode configured to illuminate at least a portion of at least one magnetic recording medium; at least one laser power level sensor configured to detect a power level of the at least one laser diode; and a controller configured to modify one or more power level settings associated with the at least one laser diode in response to one or more output signals of the at least one laser power level sensor. | 05-01-2014 |
20140153373 | SUSPENSION BOARD WITH CIRCUIT - A suspension board with circuit is for mounting thereon a slider/light source unit provided with a slider on which a magnetic head is mounted, and a light source device including a main body, and a light source provided to protrude from the main body. The suspension board with circuit includes a receiving portion formed therein to be capable of receiving the light source, and a guide surface for guiding the light source to the receiving portion when the slider/light source unit is mounted. | 06-05-2014 |
20140192629 | COLOR REWRITABLE STORAGE - A chromatic data storage system includes a substrate. The substrate includes nanoparticles operable to emit light frequencies (e.g. color) based upon a magnetic field strength, and a curable material operable to solidify spacing and/or orientation of the nanoparticles. In addition, the chromatic data storage system includes a writer operable to emit a magnetic field, and further operable to cure the curable material. Furthermore, the chromatic data storage system includes a reader operable to photodetect the light frequencies, wherein the light frequencies represent computer-readable instructions. | 07-10-2014 |
20140233361 | THERMALLY-ASSISTED MAGNETIC RECORDING HEAD AND METHOD OF MANUFACTURING THE SAME - This thermally-assisted magnetic recording head includes: a waveguide; a magnetic pole; and a plasmon generator having a first region and a second region, in which the first region has an one end exposed on an air-bearing surface and another end located on an opposite side of the air-bearing surface, and in which the second region is coupled to the another end of the first region and has a volume greater than a volume of the first region. The first region includes a high-density region having a density that is greater than the density of the second region. | 08-21-2014 |
20140254334 | ENCAPSULATED LASER DIODE FOR HEAT-ASSISTED MAGNETIC RECORDING - A magnetic write head is disclosed that includes a slider that includes a laser diode having a light-emitting edge or surface of a laser diode and an optical waveguide. The disclosed magnetic write head also includes a dielectric layer disposed in a gap between the laser diode and an input to the optical waveguide. The dielectric layer fills the gap completely and provides a low-loss optical pathway for the laser diode to the input of the optical waveguide. Also disclosed is a method that includes spinning on a dielectric in a gap between the light-emitting surface and the optical waveguide coupler, wherein after the spinning on, the laser diode is optically coupled to the optical waveguide coupler through the dielectric. | 09-11-2014 |
20150016238 | PLASMONIC WAVEGUIDE WITH AN ANGLED, ELONGATED PORTION - An apparatus includes an input region having a high-refractive-index material and an input surface configured to receive light emitted from a laser. An output surface of the apparatus is configured to deliver energy to a recording medium. The apparatus includes a plasmonic waveguide having a first elongated portion at an angle to the input surface and configured to receive the light through the input region. In response to receiving the light, surface plasmons are excited and guided to an end of the first elongated portion. The plasmonic waveguide includes a second elongated portion coupled to the end of the first elongated portion and configured to guide the surface plasmons to the output surface. | 01-15-2015 |
20150036468 | METHOD USING EPITAXIAL TRANSFER TO INTEGRATE HAMR PHOTONIC INTEGRATED CIRCUIT (PIC) INTO RECORDING HEAD WAFER - Embodiments of the present invention generally relate to a method for forming a HAMR device having a photonic integrated circuit that includes an optical detector, an optical emitter, and an optical element distinct from the optical detector and the optical emitter, where the elements of the photonic integrated circuit are aligned with a near field transducer. The method includes forming one or more layers on a substrate, bonding the layers to a partially fabricated recording head, removing the substrate using epitaxial lift-off, and forming the optical elements on the partially fabricated recording head. | 02-05-2015 |
20150109893 | Tilted Structures to Reduce Reflection in Laser-Assisted TAMR - A TAMR (Thermal Assisted Magnetic Recording) write head uses the energy of optical-laser excited surface plasmons in a plasmon generator to locally heat a magnetic recording medium and reduce its coercivity and magnetic anisotropy. The optical radiation is transmitted to the plasmon generator by means of a waveguide, whose optical axis (centerline) is tilted relative to either or both the backside surface normal and ABS surface normal in order to eliminate back reflections of the optical radiation that can adversely affect the properties and performance of the laser. Variations of the disclosure include tilting the plasmon generator, the waveguide and the laser diode. | 04-23-2015 |
20150131415 | MODE CONVERTER COUPLING ENERGY AT A HIGH-ORDER TRANSVERSE ELECTRIC MODE TO A PLASMONIC TRANSDUCER - A waveguide is configured to couple light from a light source at a fundamental transverse electric (TE) mode. A mode converter outputs the light to an output region of the waveguide at a higher-order TE mode. A plasmonic transducer receives the light at the higher order TE mode and generates surface plasmons that heat a recording medium. The plasmonic transducer includes: an input end proximate the output region of the waveguide and comprising a first convex curved edge; an output end proximate a surface that faces the recording medium, the output end comprising a second convex curved edge and a peg; and linear edges between the first and second convex curved edges. | 05-14-2015 |
20150146507 | Submount-Integrated PhotoDetector For Monitoring A Laser For A Heat-Assisted Magnetic Recording Head - In a heat-assisted magnetic recording hard disk drive, a laser module includes a submount-integrated photodetector configured to receive optical energy from a laser by way of a head slider. The submount may be formed of a semiconductor material such as a crystalline silicon material, and the photodetector may be a photodiode that is integrally formed with the submount. A HAMR head slider may comprise a feedback waveguide configured to guide optical energy from the laser through the slider to a feedback photodiode at an interface of the submount and the slider, to detect the optical energy transmitted through the slider to the slider air bearing surface (ABS). A back facet photodiode may also be integrally formed with the submount and configured to receive back facet optical energy to detect the optical energy generated by the laser. | 05-28-2015 |
20150318005 | WAVEGUIDE POWER SENSOR STRUCTURES FREE OF OPTICAL COHERENCE EFFECTS IN A HAMR DRIVE - Embodiments disclosed herein generally relate to a HAMR device for use in a magnetic reading system. The HAMR device has a primary waveguide extending from a media facing surface to a surface opposite the media facing surface. In one embodiment, the HAMR head has a secondary waveguide having a first and second end positioned within the HAMR head. The secondary waveguide is positioned near the primary waveguide, and the first and second ends of the secondary waveguide are non-reflecting. A thermal sensor is coupled to the secondary waveguide, and responds only to optical power fluctuations in the primary waveguide. In another embodiment, the HAMR head has a second thermal sensor rather than a secondary waveguide. The first thermal sensor and the second thermal sensor are coupled together to act as one optical power sensor and are disposed on the primary waveguide. | 11-05-2015 |
20160118075 | LASER SUBASSEMBLY METALLIZATION FOR HEAT ASSISTED MAGNETIC RECORDING - A heat assisted magnetic recording (HAMR) assembly includes a slider, a laser diode and solder connections between the laser diode and the slider. The solder connections mechanically and electrically attach the laser diode to the slider. Each solder connection has a total volume per unit area (i.e., height) of less than or equal to about 15 μm. The solder connections have a first intermetallic zone adjacent to the laser diode, a second intermetallic zone adjacent to the slider, and a eutectic zone of eutectic material between the first and second intermetallic zones. The eutectic zone occupies greater than or equal to about 35% of the total volume per unit area of the solder connection. | 04-28-2016 |