Air Bearing Surface Detail Patents (Class 360/235.4)
  • Patent number: 11074929
    Abstract: Aspects of the present disclosure provide various magnetic recording slider structures and fabrication methods that can reduce head overcoat (HOC) thickness without significantly reducing the lifetime and reliability of a slider by using a protective cap placed on preselected locations on the outermost surface or HOC of the slider. A slider includes a writer comprising an energy-assisted recording element. The writer is configured to store information on a magnetic medium using the energy-assisted recording element. The slider includes a head overcoat (HOC) layer providing an outermost media facing surface. The slider further includes a protective cap positioned on the HOC layer to at least partially cover the energy-assisted recording element, the protective cap including a preselected shape configured to protect the energy-assisted recording element.
    Type: Grant
    Filed: July 2, 2020
    Date of Patent: July 27, 2021
    Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.
    Inventors: John Pierre Herber, Mark David Alnas Alias, Aileen Ticzon Jara, Reimar Azupardo
  • Patent number: 10943612
    Abstract: A reader having a sensor stack and a top shield above the sensor stack. The top shield has an upper surface and a lower surface. The reader also includes at least one side shield below the top shield and adjacent to the sensor stack. The reader further includes a decoupling layer between the upper surface of the top shield and the at least one side shield. The decoupling layer is configured to decouple a first portion of the at least one side shield, proximate to the sensor stack, from at least a portion of the top shield.
    Type: Grant
    Filed: March 10, 2020
    Date of Patent: March 9, 2021
    Assignee: Seagate Technology LLC
    Inventors: Victor Sapozhnikov, Taras Grigorievich Pokhil, Mohammed Shariat Ullah Patwari
  • Patent number: 10832710
    Abstract: Embodiments of the present disclosure generally relate to a magnetic media drive employing a magnetic recording device. The magnetic recording device comprises a trailing gap disposed adjacent to a first surface of a main pole, a first side gap disposed adjacent to a second surface of the main pole, a second side gap disposed adjacent to a third surface of the main pole, and a leading gap disposed adjacent to a fourth surface of the main pole. A side shield surrounds the main pole and comprises a heavy metal first layer and a magnetic second layer. The first layer surrounds the first, second, and third surfaces of the main pole, or the second, third, and fourth surfaces of the main pole. The second layer surrounds the second and third surfaces of the main pole, and may further surround the fourth surface of the main pole.
    Type: Grant
    Filed: September 9, 2019
    Date of Patent: November 10, 2020
    Assignee: WESTERN DIGITAL TECHNOLOGIES, Inc.
    Inventors: Suping Song, Zhanjie Li, Terence Lam, Lijie Guan
  • Patent number: 10629236
    Abstract: Disclosed herein are sliders having air-bearing surface (ABS) designs to mitigate the effects of smear on near-field transducers used in data storage devices, and data storage devices comprising such sliders. A slider comprises a leading edge, a trailing edge, a NFT, and an ABS with features to increase oxygen concentration near the NFT. The ABS comprises a channel configured to direct gas in a direction from the leading edge toward the trailing edge and a funnel region connected to the channel, disposed between the channel and the NFT, and configured to receive gas from the channel. In an ABS view of the slider, a width of the funnel region along a longitudinal axis passing through the NFT monotonically increases with distance from the NFT.
    Type: Grant
    Filed: November 12, 2018
    Date of Patent: April 21, 2020
    Assignee: Western Digital Technologies, Inc.
    Inventors: Nan Liu, Weidong Huang
  • Patent number: 10629238
    Abstract: An apparatus includes a logical space and first and second physical spaces. The apparatus further includes a map in which first successive alternate logical elements of the logical space are mapped to successive adjacent physical elements of the first physical space, and second successive alternate logical elements of the logical space are mapped to successive adjacent physical elements of the second physical space. A control circuit employs the map to substantially concurrently manage storage of data extents into the first and second physical space by routing a first subset of the data extents into the first physical space, routing a second subset of the data extents into the second physical space, and splitting individual extents of a third subset of the data extents into sub-portions, with at least one of the sub-portions being routed to the first physical space and another sub-portion being routed to the second physical space.
    Type: Grant
    Filed: March 1, 2019
    Date of Patent: April 21, 2020
    Assignee: SEAGATE TECHNOLOGY LLC
    Inventors: Bruce Buch, Xiong Liu, Kenneth Haapala, Brian T. Edgar
  • Patent number: 10475479
    Abstract: According to one embodiment, a head gimbal assembly includes a suspension and a magnetic head supported by the suspension via a gimbal portion. The magnetic head includes a slider and a head portion in the slider. The slider includes an air bearing surface, a pair of side surfaces, a leading-side end surface, and a trailing-side end surface. The slider includes a deep groove which is formed between a leading-side step portion and a trailing-side step portion and is open to the air bearing surface and the pair of side surfaces, and at least a pair of capturing grooves which is formed on a bottom surface of the deep groove. The capturing grooves are provided along the pair of side surface and are placed with a gap from the pair of side surfaces.
    Type: Grant
    Filed: August 6, 2018
    Date of Patent: November 12, 2019
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
    Inventors: Kazuhiro Furutani, Toru Watanabe, Masami Yamane, Kan Takahashi
  • Patent number: 10083713
    Abstract: A heat-assisted magnetic recording (HAMR) head has a protective multilayer confined to a window of the disk-facing surface of the slider that surrounds the near-field transducer (NFT) end and write pole end. The protective multilayer is made up of alternating films of a metal and diamond-like carbon (DLC). All of the metal films are formed of the same metal selected from Ti, Zr, Hf, V, Nb, Ta, Cr, Mo and W, with the preferred metal being zirconium (Zr). A slider protective overcoat may be formed over the entire disk-facing surface in both the window region and the non-window region, with the protective multilayer formed on the slider overcoat in the window region. The overcoat may be absent in the window region, in which case an adhesion film is on the NFT and write pole ends in the window region, with the protective multilayer being formed on the adhesion film.
    Type: Grant
    Filed: August 16, 2017
    Date of Patent: September 25, 2018
    Assignee: Western Digital Technologies, Inc.
    Inventors: Randall George Simmons, Cherngye Hwang, Dung Thi Nguyen, Mousumi Mani Biswas
  • Patent number: 10065428
    Abstract: In accordance with an embodiment, a liquid circulation module comprises a liquid ejection head for ejecting liquid, a storage section connected with the liquid ejection head to store the liquid, a circulation section configured to circulate the liquid in a predetermined circulation path passing through the liquid ejection head and the storage section, a pressure detection section configured to detect pressure in the storage section, a pressure adjusting section configured to adjust pressure in the storage section, and a module controller configured to control a circulation operation of the circulation section and a pressure adjusting operation of the pressure adjusting section independently from a host controller arranged separately from the liquid circulation module and when communicating with the host controller.
    Type: Grant
    Filed: February 8, 2017
    Date of Patent: September 4, 2018
    Assignee: TOSHIBA TEC KABUSHIKI KAISHA
    Inventors: Kazuhiko Ohtsu, Kazuhiro Hara
  • Patent number: 9928858
    Abstract: A method that includes supplying a predetermined signal to a write head having side shields. The method also includes performing, by the write head, a recording operation on a surface of a data storage medium, when the predetermined signal is supplied to the write head, to provide a recorded magnetization pattern. The method further includes carrying out measurements on a portion of the recorded magnetization pattern influenced by a magnetization of the side shields. The measurements are employed to determine whether a reversed side shield magnetization condition is present in the write head.
    Type: Grant
    Filed: September 12, 2017
    Date of Patent: March 27, 2018
    Assignee: Seagate Technology LLC
    Inventors: Zhe Shen, Zuxuan Lin, Lei Lu, Jian Zhong
  • Patent number: 9876165
    Abstract: A method for forming a pattern, the method including forming an etch target layer on a substrate; patterning the etch target layer to form patterns; and performing a pre-oxidation trim process a plurality of times, the pre-oxidation trim process including performing an oxidation process to form an insulating layer on a sidewall of each of the patterns; and performing a sputter etch process to remove at least a portion of the insulating layer.
    Type: Grant
    Filed: June 13, 2016
    Date of Patent: January 23, 2018
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Sang-Kuk Kim, Jong-Kyu Kim, Jongchul Park, Inho Kim, Gwang-Hyun Baek, Jung-Ik Oh
  • Patent number: 9773517
    Abstract: A storage device includes a transducer head with multiple write elements having write poles of different sizes. For example, the transducer head may include two write poles of different width configured to write to a same surface of a storage medium. A controller of the storage device is configured to selectively engage one of the multiple write elements to write data to the storage medium.
    Type: Grant
    Filed: April 13, 2015
    Date of Patent: September 26, 2017
    Assignee: SEAGATE TECHNOLOGY LLC
    Inventors: Kaizhong Gao, Edward Gage, Huaqing Yin, Yonghua Chen
  • Patent number: 9679586
    Abstract: A manufacturing method of a write portion for a thermally assisted magnetic head slider includes providing a write portion including a write element, a waveguide, and a plasmon unit; lapping opposed-to-magnetic recording medium surfaces of the write element and the waveguide, and an near-field light generating surface of the plasmon unit; only forming a carbon layer on the opposed-to-magnetic recording medium surface of the write element. Corrosive elements in the write portion can be prevented from being corroded and the write element can be prevented from being worn and abraded not only, stable thermal ability for a plasmon unit can be maintained but also.
    Type: Grant
    Filed: May 5, 2015
    Date of Patent: June 13, 2017
    Assignee: SAE MAGNETICS (H.K.) LTD.
    Inventors: Natsuo Nishijima, Dong Sheng Li
  • Patent number: 9384764
    Abstract: In one general embodiment, an apparatus includes a magnetic sensor structure, a magnetic shield having at least one laminate pair comprising a magnetic layer and an electrically conductive nonmagnetic layer, and a nonmagnetic spacer layer between the sensor structure and the magnetic shield. In another general embodiment, an apparatus includes a magnetic tunnel junction sensor structure, and a magnetic shield having at least two laminate pairs, each pair comprising a magnetic layer and an electrically conductive nonmagnetic layer. A deposition thickness of the nonmagnetic layer in each laminate pair is about 10% or less of a total deposition thickness of the laminate pair.
    Type: Grant
    Filed: June 27, 2015
    Date of Patent: July 5, 2016
    Assignee: International Business Machines Corporation
    Inventors: Robert G. Biskeborn, Calvin S. Lo, Andrew C. Ting
  • Patent number: 9123366
    Abstract: A magnetic data storage drive that includes a self-assembled monolayer having a magnetic function. The drive comprises a magnetic data storage medium having a magnetic surface, a slider having a working surface, the slider positioned and configured to detect magnetic fields from the magnetic surface of the medium, and a self-assembled monolayer between the magnetic surface and the working surface, the self-assembled monolayer having a magnetic function to reduce dispersion of magnetic fields from the magnetic surface of the medium to the working surface of the slider.
    Type: Grant
    Filed: June 27, 2013
    Date of Patent: September 1, 2015
    Assignee: Seagate Technology LLC
    Inventors: Timothy W. Stoebe, David J. Ellison
  • Patent number: 9025422
    Abstract: The present invention relates to a plasmon generator, in which a surface plasmon is excited by application of light. The plasmon generator extends along one direction. The plasmon generator includes a first end surface that is positioned on one end in the one direction and at which near-field light is generated along with the excitation of the plasmon; and a second cross section that is substantially parallel to the first end surface and is away from the first end surface. The first end surface has a polygonal shape that does not have a substantially acute inner angle. The second cross section has an upper part that has a shape substantially the same as or similar to that of the first end surface and a flare shaped lower part that is connected to the upper part and has a width that increases as it is far from the upper part.
    Type: Grant
    Filed: March 25, 2013
    Date of Patent: May 5, 2015
    Assignee: TDK Corporation
    Inventors: Susumu Aoki, Kosuke Tanaka, Keita Kawamori, Hiroki Kawato, Takeshi Tsutsumi
  • Publication number: 20150103434
    Abstract: In one embodiment, a magnetic head includes a main pole configured to emit a recording magnetic field for affecting a magnetic medium, the main pole configured to serve as a first electrode and having a front portion at an air bearing surface (ABS) of the magnetic head and a rear portion extending from the front portion in an element height direction perpendicular to the ABS, wherein an upper surface of the front portion of the main pole is angled with respect to a plane of deposition at a first angle of inclination of greater than 0°, and wherein at least a portion of an upper surface of the rear portion of the main pole is angled at a first angle of declination greater than 0° with respect to the plane of deposition, an upper shield positioned above the main pole, the upper shield configured to serve as a second electrode, and a microwave oscillator positioned between the main pole and the upper shield at the ABS.
    Type: Application
    Filed: October 10, 2013
    Publication date: April 16, 2015
    Applicant: HGST Netherlands B.V.
    Inventors: Kimitoshi Etoh, Kazuhiko Hosomi, Mikito Sugiyama, Tomohiro Okada
  • Publication number: 20150098153
    Abstract: A disk drive includes a disk including a magnetizable layer of material, and a transducer. The transducer has a read element that includes a first shield layer, a pinned layer, a metallic spacer, an AP (anti-parallel) free layer, and a second shield layer. The pinned layer has a surface area which is greater than the area of the AP free layer. The read element also includes an anti-ferromagnetic layer for substantially fixing the magnetic orientation of a plurality of domains in the pinned layer. The ferromagnetic layer is adjacent the pinned layer. The pinned layer, and the anti-ferromagnetic layer both have surface areas which are greater than the area associated with the AP free layer. The anti-ferromagnetic layer, in one embodiment, has a pinning strength in the range of 0.5 erg/cm2 to 1.5 erg/cm2.
    Type: Application
    Filed: October 3, 2013
    Publication date: April 9, 2015
    Applicant: HGST Netherlands B.V.
    Inventors: Matthew Joseph CAREY, Jeffrey Robinson CHILDRESS, Young-suk CHOI, Goran MIHAJLOVIC, John Creighton READ, Neil SMITH
  • Patent number: 9001467
    Abstract: A method and system provide a magnetic transducer having an air-bearing surface (ABS) location, a pole and a gap. The pole has a bottom and a top wider than the bottom. The gap is on the top of the pole and at least as wide as the top of the pole such that an overhang is formed between a top edge of the gap and a bottom edge of the bottom of the pole. The method includes providing a plurality of bottom antireflective coatings (BARCs). The plurality of BARCs form a BARC layer that fills the overhang. A shield photoresist mask is provided on at least a portion of the BARC layer. The shield, which includes at least one side shield, is provided.
    Type: Grant
    Filed: June 9, 2014
    Date of Patent: April 7, 2015
    Assignee: Western Digital (Fremont), LLC
    Inventors: Xianzhong Zeng, Mingjun Yu, Hai Sun, Donghong Li
  • Publication number: 20150085402
    Abstract: A data writing element may be configured at least with a write pole positioned adjacent a first shield along a first axis and adjacent a second shield along a second axis. The second shield may be separated from the write pole by a first gap distance on an air bearing surface (ABS) and by a second gap distance distal the ABS with the first and second gap distances meeting at a transition surface oriented parallel to the ABS.
    Type: Application
    Filed: September 25, 2013
    Publication date: March 26, 2015
    Applicant: Seagate Technology LLC
    Inventors: Muhammad Asif Bashir, Mark Gubbins, Swaraj Basu, Marcus B. Mooney
  • Publication number: 20150077882
    Abstract: Implementations described and claimed herein provide a synthetic antiferromagnetic (SAF) layer with canted pinning, wherein a down-track direction facing surface of the SAF layer has edges that are substantially parallel to pinning direction of the SAF layer.
    Type: Application
    Filed: September 16, 2013
    Publication date: March 19, 2015
    Applicant: Seagate Technology LLC
    Inventor: Harry S. Edelman
  • Publication number: 20150070800
    Abstract: A data reader may be configured at least with detector and injector stacks that each has a common spin accumulation layer. The detector stack may positioned on an air bearing surface (ABS) while the injector stack is positioned distal the ABS. The injector stack can have a diffusive layer with a larger spin diffusion length than mean free path.
    Type: Application
    Filed: September 10, 2013
    Publication date: March 12, 2015
    Applicant: Seagate Technology LLC
    Inventors: Dimitar Velikov Dimitrov, Dian Song, Mark Thomas Kief, Amit Sharma
  • Publication number: 20150070799
    Abstract: A data reader may be configured at least with a magnetic stack positioned on an air bearing surface (ABS) and contacting a spin depolarizing layer that is a minority spin current carrier. The spin depolarizing layer can have a thickness and spin diffusion length corresponding to a net zero spin polarization at an interface of the magnetic stack and spin depolarizing layer.
    Type: Application
    Filed: September 6, 2013
    Publication date: March 12, 2015
    Applicant: Seagate Technology LLC
    Inventors: Dimitar Velikov Dimitrov, Dian Song, Mark Thomas Kief, Amit Sharma
  • Publication number: 20150062755
    Abstract: Implementations described and claimed herein provide a dual reader wherein a bottom shield is attached to side shields.
    Type: Application
    Filed: August 28, 2013
    Publication date: March 5, 2015
    Applicant: Seagate Technology LLC
    Inventors: Victor Boris Sapozhnikov, Mohammed Sharia Ullah Patwari
  • Publication number: 20150063086
    Abstract: A device having an air bearing surface and a method of forming the device are disclosed. The device can include a writer portion including a surface at the air bearing surface of the device, a magnetic adhesion layer disposed proximate at least a portion of the surface of the writer portion, and an overcoat disposed proximate at least a portion of the magnetic adhesion layer such that the magnetic adhesion layer is between the at least a portion of the surface of the writer portion and the overcoat.
    Type: Application
    Filed: August 28, 2013
    Publication date: March 5, 2015
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventor: Kurt W. Wierman
  • Publication number: 20150062757
    Abstract: A data reader may be configured at least with a magnetic stack that has a first magnetic layer separated from a second magnetic layer by a non-magnetic spacer layer. The first magnetic layer may have an areal extent on an air bearing surface (ABS) that differs from the second magnetic layer while the second magnetic layer can be configured with a first plurality of linear sidewalls that are each angled with respect to a second plurality of linear sidewalls of the first magnetic layer.
    Type: Application
    Filed: September 5, 2013
    Publication date: March 5, 2015
    Applicant: Seagate Technology LLC
    Inventors: Dimitar Velikov Dimitrov, Dian Song, Mark Thomas Kief, Sung-Hoon Gee
  • Publication number: 20150062756
    Abstract: An apparatus disclosed herein comprises a reader structure having a sensor stack and a bottom shield having a first end and a second end on opposite sides of the bottom shield in a cross-track direction, wherein the first end is formed by intersection of arcs.
    Type: Application
    Filed: August 29, 2013
    Publication date: March 5, 2015
    Applicant: Seagate Technology LLC
    Inventors: Michael Kautzky, Venkateswara Inturi
  • Publication number: 20150062754
    Abstract: A writer core of a transducer is configured to interact with a magnetic recording medium and comprises an upper core and a lower core. At least one of the upper and lower cores comprises a return pole having a return shield. The apparatus also comprises a writer pole between the upper and lower cores, and a writer gap defined between the writer pole and the return shield. The apparatus further comprises a sensor element within one of the upper and lower cores that includes the writer gap. The sensor element has a temperature coefficient of resistance and is configured to sense for a change in temperature indicative of one or both of a change in spacing and contact between the transducer and the magnetic recording medium.
    Type: Application
    Filed: August 28, 2013
    Publication date: March 5, 2015
    Applicant: Seagate Technology LLC
    Inventors: Peng Peng, Declan Macken, Michael Thomas Johnson, Zheying Guo
  • Publication number: 20150062753
    Abstract: Embodiments of the present invention generally relate to a magnetic device having a discontinuous array of columns disposed near a magnetic pole. Each column has a length extending perpendicular to an air bearing surface and a width. The length is greater than the width.
    Type: Application
    Filed: August 28, 2013
    Publication date: March 5, 2015
    Applicant: HGST NETHERLANDS B.V.
    Inventors: Quan-Chiu Harry LAM, Edward Hin Pong LEE, Xinjiang SHEN, Ning SHI
  • Patent number: 8970988
    Abstract: A method and system provide a magnetic transducer having an air-bearing surface (ABS) and at least two read sensors. The magnetic transducer also includes a first read shield, a first read sensor, a middle shield, a second read sensor, a second read shield, a first electric gap and a second electric gap. The first read sensor is in a down track direction from the first read shield. The middle shield is in a down track direction from the first read sensor. The middle shield is between the first read sensor and the second read sensor. A first portion of the first electric gap is in a direction opposite to the down track direction from the first read sensor. The first read sensor and the second read sensor are between the first electric gap and the second electric gap in a cross-track direction.
    Type: Grant
    Filed: April 15, 2014
    Date of Patent: March 3, 2015
    Assignee: Western Digital (Fremont), LLC
    Inventors: Shaoping Li, Gerardo A. Bertero, Changhe Shang, Ge Yi, Steven C. Rudy, Guolun Hao, Qunwen Leng, Shihai He, Yingbo Zhang, Ming Mao, Lien-Chang Wang
  • Publication number: 20150055251
    Abstract: An apparatus disclosed herein includes a sensor with a free layer having cross-track easy axis anisotropy.
    Type: Application
    Filed: August 23, 2013
    Publication date: February 26, 2015
    Applicant: Seagate Technology LLC
    Inventors: Victor Boris Sapozhnikov, Mohammed Sharia Ullah Patwari
  • Publication number: 20150036245
    Abstract: An apparatus disclosed herein comprises a magnetically free layer and a bottom shield, wherein a first portion of the bottom shield substantially adjacent the free layer is pinned perpendicular to an air-bearing surface (ABS) of the apparatus and a second portion of the bottom shield not substantially adjacent the free layer is pinned parallel to the ABS of the apparatus.
    Type: Application
    Filed: July 31, 2013
    Publication date: February 5, 2015
    Applicant: Seagate Technology LLC
    Inventors: Victor Boris Sapozhnikov, Taras Grigoryevich Pokhil, Mohammed Sharia Ullah Patwari
  • Publication number: 20150036244
    Abstract: A magnetic head, according to one embodiment, includes a sensor structure extending from an air bearing surface end thereof in a stripe height direction, the sensor structure having sidewalls on opposite sides thereof, the sidewalls extending between a top and a bottom of the sensor structure, the sidewalls extending in the stripe height direction, wherein a spacing between the sidewalls in a track width direction along the top of the sensor structure is about constant therealong in the stripe height direction.
    Type: Application
    Filed: July 30, 2013
    Publication date: February 5, 2015
    Applicant: HGST Netherlands B.V.
    Inventors: Guomin Mao, Yi Zheng
  • Publication number: 20150029610
    Abstract: In one embodiment, a magnetic head includes a magnetoresistive sensor having a free layer and a soft magnetic layer adapted to control a magnetization direction of the free layer and a magnetic domain of the free layer, wherein a close-packed plane of the soft magnetic layer is positioned parallel to an air bearing surface (ABS) of the magnetic head. In another embodiment, a method for forming a magnetic head includes forming a magnetoresistive sensor having a free layer above a substrate and forming a soft magnetic layer adapted to control a magnetization direction of the free layer and a magnetic domain of the free layer, wherein a close-packed plane of the soft magnetic layer is positioned parallel or oblique to an ABS of the magnetic head.
    Type: Application
    Filed: July 23, 2013
    Publication date: January 29, 2015
    Applicant: HGST Netherlands B.V.
    Inventors: Norihiro Okawa, Kouji Okazaki
  • Publication number: 20150029611
    Abstract: In one general embodiment, a magnetic head includes a stitch pole; and a main pole formed adjacent the stitch pole, wherein an end region of the stitch pole closest to an air bearing surface of the head tapers towards the main pole. In another general embodiment, a magnetic head includes a stitch pole being a laminate of at least two magnetic layers separated b a nonmagnetic layer; and a main pole formed adjacent the stitch pole. An end region of the stitch pole closest to an bearing surface of the bead tapers towards the main pole. An average angle of the taper of the end region of the stitch pole is between about 20 and about 45 degrees. Such head may be implemented in a data storage system.
    Type: Application
    Filed: July 24, 2013
    Publication date: January 29, 2015
    Applicant: HGST Netherlands B.V.
    Inventors: Venkata R. K. Gorantla, Wen-Chien D. Hsiao, Yimin Hsu, Terence T. L. Lam, Yansheng Luo, Aron Pentek, Katalin Pentek
  • Publication number: 20150029615
    Abstract: Approaches to improving hard disk drive far track interference problems include utilizing a wrap-around shield having recessed high magnetic moment layer(s). Embodiments include tapering the high-moment portion away from the air bearing surface (ABS) in the cross-track direction away from the write pole, thereby reducing exposure of high moment layers at the ABS to reduce the risk of unwanted track erasure away from the main pole. Embodiments include positioning the high magnetic moment layers in their entirety away from the ABS, such as with a laminate structure of high magnetic moment and low magnetic moment materials laid down in a direction away from the pole tip trailing edge.
    Type: Application
    Filed: July 24, 2013
    Publication date: January 29, 2015
    Applicant: HGST Netherlands B.V.
    Inventor: Venkatesh Chembrolu
  • Publication number: 20150002963
    Abstract: The present application relates to a write gap structure for a magnetic recording head. In illustrated embodiments, the write gap structure includes multiple write gap segments along a beveled pole tip surface between a top edge and a bottom edge of the beveled pole tip surface to provide a narrow write gap proximate to the air bearing surface and a larger write gap behind the air bearing surface. In illustrated embodiments, the narrow write gap segment is formed between the beveled pole tip surface and a lower back surface of front shield and the larger write gap is formed between the beveled pole tip surface and an upper back surface of the front shield.
    Type: Application
    Filed: June 28, 2013
    Publication date: January 1, 2015
    Inventors: Wei Tian, Huaqing Yin, Yan Dong, Joseph M. Mundenar, Jianhua Xue
  • Publication number: 20150002962
    Abstract: An apparatus disclosed herein includes a sensor stack including a first layer and an AFM stabilized bottom shield in proximity to the first layer, wherein the AFM stabilized bottom shield is magnetically coupled to the first layer.
    Type: Application
    Filed: June 28, 2013
    Publication date: January 1, 2015
    Inventors: Eric W. Singleton, Konstantin Nikolaev, Liwen Tan, Jae-Young Yi, Victor Boris Sapozhnikov, Mohammed Sharia Ullah Patwari
  • Publication number: 20150002961
    Abstract: A scissor type magnetic sensor having a soft magnetic bias structure located at a back edge of the sensor stack. The sensor stack includes first and second magnetic free layers that are anti-parallel coupled across a non-magnetic layer sandwiched there-between. The soft magnetic bias structure has a length as measured perpendicular to the air bearing surface that is greater than its width as measured parallel with the air bearing surface. This shape allows the soft magnetic bias structure to have a magnetization that is maintained in a direction perpendicular to the air bearing surface and which allows the bias structure to maintain a magnetic bias field for biasing the free layers of the sensor stack.
    Type: Application
    Filed: June 26, 2013
    Publication date: January 1, 2015
    Inventors: Christopher D. Keener, Quang Le, David J. Seagle, Neil Smith, Petrus A. Van Der Heijden
  • Publication number: 20140376131
    Abstract: A data writer may be generally configured at least with a write pole that has a pole sidewall and a continuous first taper angle connecting leading and trailing edges. The write pole can be positioned adjacent to a side shield that is configured with first and second shield sidewalls tapered to a shield tip that is the closest point between the write pole and side shield.
    Type: Application
    Filed: September 8, 2014
    Publication date: December 25, 2014
    Inventors: Eric Shane Linville, Jianhua Xue, Eric Roger Meloche, Huaqing Yin, Yonghua Chen
  • Publication number: 20140340792
    Abstract: An apparatus can be generally directed to a magnetic stack having a magnetically free layer positioned on an air bearing surface (ABS). The magnetically free layer can be biased to a predetermined magnetization in various embodiments by a biasing structure that is coupled with the magnetically free layer and positioned distal the ABS.
    Type: Application
    Filed: July 31, 2014
    Publication date: November 20, 2014
    Inventors: Mark William Covington, Dimitar Velikov Dimitrov, Dian Song
  • Publication number: 20140327988
    Abstract: A data reader can be configured with at least a magnetically responsive lamination that has a first portion with a first stripe height from an air bearing surface (ABS) and a second portion with a different second stripe height from the ABS. The first portion can be constructed to have a back edge surface shaped at a predetermined angle relative to the ABS by a back edge feature.
    Type: Application
    Filed: May 6, 2013
    Publication date: November 6, 2014
    Applicant: Seagate Technology LLC
    Inventors: Xin Cao, Frances Paula McElhinney, Jiansheng Xu, Marcus Winston Ormston
  • Publication number: 20140327989
    Abstract: Various embodiments may configure a data storage device with at least a magnetic element having a magnetic stack that is configured with an air bearing surface (ABS) and is separated from a side shield. The side shield can be biased by a biasing layer that contacts the side shield and is separated from the ABS.
    Type: Application
    Filed: July 16, 2014
    Publication date: November 6, 2014
    Inventors: Victor Boris Sapozhnikov, Mohammed Shariat Ullah Patwari, Shaun Eric McKinlay
  • Patent number: 8873201
    Abstract: An apparatus includes a write pole magnetically coupled to write coils that generate a first magnetic field during a switching event. The apparatus includes a shield at a media-facing surface and proximate the write pole. A conductive element is disposed proximate the shield and configured to generate a second magnetic field opposite to the first magnetic field during the switching event. A selected one of the write coils is located adjacent the shield separate from others of the write coils.
    Type: Grant
    Filed: August 7, 2013
    Date of Patent: October 28, 2014
    Assignee: Seagate Technology LLC
    Inventors: Mourad Benakli, Kirill Aleksandrovich Rivkin, Zhe Shen, Jiaoming Qiu, Huaqing Yin
  • Publication number: 20140313613
    Abstract: Approaches for a magnetic write head having an adjacent coil architecture, wherein a coil turn is fabricated immediately adjacent to the writer main pole. The adjacent portion essentially lies on the main pole, except for a very thin layer of insulation atomically layered in between. The adjacent coil portion is also substantially closer o the wrap-around shield in comparison with conventional coil configurations. Further, the other upper coil portions may be fabricated to essentially lie on the stitch pole, again except for a very thin atomic layer deposited layer of insulation layered between. This adjacent coil configuration provides a writer coil configuration that concentrates the coil structure significantly closer to the main pole surface, as well as concentrates more of the coil structure closer to the main pole tip, providing for a more efficient and faster write head.
    Type: Application
    Filed: April 19, 2013
    Publication date: October 23, 2014
    Applicant: HGST Netherlands B.V.
    Inventors: Edward Hin Pong Lee, Aron Pentek
  • Publication number: 20140313614
    Abstract: Approaches for a magnetic write head having a stacked coil architecture. Embodiments utilize the better process control capability available with thin films' thicknesses, compared to the control capability of vertical gap-filling processes, which provides for better scalability to shorter yoke length magnetic write heads, which are faster at writing data bits than are magnetic write heads having a longer yoke length.
    Type: Application
    Filed: April 19, 2013
    Publication date: October 23, 2014
    Applicant: HGST Netherlands B.V.
    Inventors: Wen-Chien David Hsiao, Quan-chiu Harry Lam, Edward Hin Pong Lee, Guomin Mao, Yi Zheng
  • Publication number: 20140300995
    Abstract: A magnetic element can be configured as a data writer with at least a write pole contacting a yoke and having an air bearing surface. The write pole may be shaped to match a paddle surface of the yoke that extends perpendicular to the air bearing surface and facing parallel to the air bearing surface.
    Type: Application
    Filed: May 23, 2013
    Publication date: October 9, 2014
    Applicant: Seagate Technology LLC
    Inventors: Beverley R. McConnell, Kevin Richard Heim, Mark A. Gubbins, Robert R. Lamberton
  • Publication number: 20140293475
    Abstract: An MR element suppressing a false writing into a medium with an MR part has a CPP structure. The MR part includes a nonmagnetic intermediate layer and first and second ferromagnetic layers so as to interpose the nonmagnetic intermediate layer. First and second shield layers respectively have an inclining magnetization structure of which a magnetization is inclined with regard to a track width direction. The first and second ferromagnetic layers are respectively, magnetically coupled with the first and second shield layers. A magnetization direction adjustment layer for adjusting at least a magnetization direction of the first ferromagnetic layer is positioned at a rear end surface side of the first ferromagnetic layer, which is opposite to a front end surface receiving a magnetic field detected in the MR part.
    Type: Application
    Filed: March 29, 2013
    Publication date: October 2, 2014
    Inventors: Naomichi DEGAWA, Takahiko MACHITA, Takekazu YAMANE, Takumi YANAGISAWA, Satoshi MIURA, Kenta HAMAMOTO, Minoru OTA, Kenzo MAKINO, Shohei KAWASAKI
  • Publication number: 20140293473
    Abstract: A thin film magnetic head includes a spin valve film that includes a magnetization free layer, a magnetization pinned layer and a non-magnetic spacer layer that is disposed between the magnetization free and pinned layers, and a pair of side layers that are disposed at both sides of the spin valve film in a track width direction and at least in the vicinity of the magnetization free layer and the magnetization pinned layer. Each of the side layers has a bias magnetic field application layer that includes a soft magnetic layer and applies a bias magnetic field in the track width direction to the magnetization free layer, and a gap layer that is positioned between the spin valve film and the bias magnetic field application layer, and the side layers have compression stresses at least in the vicinity of the magnetization pinned layer.
    Type: Application
    Filed: March 29, 2013
    Publication date: October 2, 2014
    Applicant: TDK Corporation
    Inventor: TDK Corporation
  • Publication number: 20140268423
    Abstract: A read head structure is disclosed with a dual piece heat sink layer having a front piece formed over a front portion of a dynamic flying height (DFH) element and a back piece above a back portion of the DFH element. A first (S1) shield is formed on the front piece and between the front piece and air bearing surface (ABS). Front and back pieces are separated by an insulator gap. The front piece is used to help control read gap protrusion. As a result, a bottom portion of the S1 shield protrudes to a greater extent than a top portion adjacent to the sensor thereby protecting the sensor from unwanted contact with the magnetic media. The dual piece heat sink layer also enables an improved Figure of Merit in terms of temperature rise in the reader per unit of actuation (nm) delivered by the DFH element.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 18, 2014
    Applicant: HEADWAY TECHNOLOGIES, INC.
    Inventors: Yan Wu, Kowang Liu, Glen Garfunkel, Min Li
  • Publication number: 20140268421
    Abstract: A magnetic sensor may be generally configured in accordance with various embodiments to have a magnetically responsive stack with first and second free layers and without a fixed magnetization. The first and second free layers can be tuned to have different stripe heights from an air bearing surface (ABS) and square rear surface features distal the ABS.
    Type: Application
    Filed: March 12, 2013
    Publication date: September 18, 2014
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventor: Jianxin Zhu