Patents Examined by William J. Klimowicz
  • Patent number: 10679657
    Abstract: The magnetic tape includes a non-magnetic support; a magnetic layer including a ferromagnetic powder and a binding agent on one surface of the non-magnetic support; and a back coating layer including a non-magnetic powder and a binding agent on the other surface of the non-magnetic support, in which a center line average surface roughness Ra measured regarding a surface of the back coating layer is equal to or smaller than 7.0 nm, and a difference (Safter?Sbefore) between a spacing Safter measured by optical interferometry regarding the surface of the back coating layer after ethanol cleaning and a spacing Sbefore measured by optical interferometry regarding the surface of the back coating layer before ethanol cleaning is greater than 0 nm and equal to or smaller than 15.0 nm.
    Type: Grant
    Filed: March 28, 2019
    Date of Patent: June 9, 2020
    Assignee: FUJIFILM Corporation
    Inventors: Takuto Kurokawa, Eiki Ozawa
  • Patent number: 10679660
    Abstract: The magnetic tape includes a magnetic layer having ferromagnetic powder and a binder on a non-magnetic support, in which the magnetic layer includes a timing-based servo pattern, the ferromagnetic powder is ferromagnetic hexagonal ferrite powder having an activation volume equal to or smaller than 1,600 nm3, and an edge shape of the timing-based servo pattern specified by a magnetic force microscope observation is a shape in which a difference (l99.9?l0.1) between a value l99.9 of a cumulative frequency function of 99.9% of a position deviation width from an ideal shape in a longitudinal direction of the magnetic tape and a value l0.1 of the cumulative frequency function of 0.1% thereof is equal to or smaller than 180 nm.
    Type: Grant
    Filed: June 13, 2019
    Date of Patent: June 9, 2020
    Assignee: FUJIFILM Corporation
    Inventors: Tetsuya Kaneko, Norihito Kasada, Eiki Ozawa
  • Patent number: 10679680
    Abstract: Certain exemplary aspects of the present disclosure are directed towards dual cavity apparatus and related methods involving hermetically sealing the cavities by evacuating and atmosphere therein, filling the cavity with a gas, and sealing the gas in the cavities. This evacuation and fill approach is carried out through openings that provide access to the cavities. During evacuation of at least one of the cavities through one of the openings, one or more spacers prevent the cavity from collapsing in response to the vacuum force.
    Type: Grant
    Filed: October 13, 2015
    Date of Patent: June 9, 2020
    Assignee: Seagate Technology LLC
    Inventors: David G. Fitzgerald, David Ray Lapp, Jeffrey James Croxall, Robert M. Gibbs
  • Patent number: 10679656
    Abstract: Described are magnetic recording heads that include an air-bearing surface and that are designed to be useful or potentially useful in two or more different types of fluid atmospheres; also described are related methods of testing the magnetic recording heads and installing the magnetic recording heads in a hard disk drive, as well as hard disk drives that contain a magnetic recording head as described.
    Type: Grant
    Filed: May 3, 2019
    Date of Patent: June 9, 2020
    Assignee: SEAGATE TECHNOLOGY LLC
    Inventors: Jiaxi Lu, Matthew Aaron Carper, Abhik Rakshit
  • Patent number: 10679649
    Abstract: An apparatus according to one embodiment includes a module having a tape bearing surface, a first edge, and a second edge, where a tape tenting region extends from the first edge toward the second edge, the first edge being a first end of the tape tenting region, a second end of the tape tenting region being positioned between the first and second edges. The apparatus includes a guide positioned relative to the first edge for inducing tenting of a moving magnetic recording tape and a transducer positioned in the tape tenting region. In one approach, the transducer is a TMR sensor. In another approach, the tape bearing surface is planar. In yet another approach, the guide is positioned to create an inflection point of the moving magnetic recording tape at a location above the tape tenting region that is between the transducer and the second edge.
    Type: Grant
    Filed: January 9, 2019
    Date of Patent: June 9, 2020
    Assignee: International Business Machines Corporation
    Inventor: Robert G. Biskeborn
  • Patent number: 10665374
    Abstract: There is provided a magnetoresistive effect element having improved magnetoresistive effect. A magnetoresistive effect element MR includes a first ferromagnetic layer 4 as a fixed magnetization layer, a second ferromagnetic layer 6 as a free magnetization layer, and a nonmagnetic spacer layer 5 provided between the first ferromagnetic layer 4 and the second ferromagnetic layer 6. The nonmagnetic spacer layer 5 includes at least one of a first insertion layer 5A provided under the nonmagnetic spacer layer 5 and a second insertion layer 5C provided over the nonmagnetic spacer layer 5. The first insertion layer 5A and the second insertion layer 5C are made of Fe2TiSi.
    Type: Grant
    Filed: September 9, 2019
    Date of Patent: May 26, 2020
    Assignee: TDK CORPORATION
    Inventors: Kazuumi Inubushi, Katsuyuki Nakada, Tomoyuki Sasaki
  • Patent number: 10658000
    Abstract: A data storage cartridge according to one embodiment comprises a housing configured to house a data storage medium, a sensor coupled to the housing, and a microcontroller coupled to the sensor. The microcontroller is configured to wirelessly communicate information about the sensor. Other embodiments relate to a data storage cartridge comprising a housing configured to house a data storage medium, a cartridge memory coupled to the housing, the cartridge memory having a wireless communications interface, and a microcontroller in physical communication with the cartridge memory. The microcontroller is configured to wirelessly communicate information retrieved from the cartridge memory.
    Type: Grant
    Filed: July 11, 2019
    Date of Patent: May 19, 2020
    Assignee: International Business Machines Corporation
    Inventors: Aravind Hippargi, Frank Krick, Christian Mueller, Bernd Freitag
  • Patent number: 10657989
    Abstract: In one general embodiment, an apparatus includes a module having a tape bearing surface, and an array of transducers extending along the tape bearing surface. The module has an aperture extending therethrough from the tape bearing surface to an opposing side of the module for permitting passage of air therethrough to the tape bearing surface. In another general embodiment, a method includes adhering a closure to a thin film layer formed on a substrate. The thin film layer has an array of transducers extending therealong. The closure has a channel therein which forms an aperture when the closure is coupled to the thin film layer. A tape bearing surface is formed along the substrate, closure and thin film layer. A recessed portion is formed in the tape bearing surface. An opening of the aperture is present in the recessed portion upon forming the recessed portion.
    Type: Grant
    Filed: December 18, 2018
    Date of Patent: May 19, 2020
    Assignee: International Business Machines Corporation
    Inventors: Robert G. Biskeborn, Calvin S. Lo
  • Patent number: 10650847
    Abstract: The present disclosure generally relates to magnetic media devices, and more specifically, to a magnetic media drive employing a magnetic recording head. The recording head includes a main pole, a trailing shield hot seed layer, a spin Hall layer disposed between the main pole and the trailing shield hot seed layer, and a spin-torque layer disposed between the main pole and the trailing shield hot seed layer. Spin-orbit torque (SOT) is generated from the spin Hall layer. The spin-torque layer magnetization switching or precession is induced by the SOT. The SOT based head reduces the switching current and the Vjump due to higher spin polarization ratio, which improves energy efficiency. In addition, the spin Hall layer and the spin-torque layer are easier to form compared to the conventional pseudo spin-valve structure.
    Type: Grant
    Filed: September 4, 2019
    Date of Patent: May 12, 2020
    Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.
    Inventors: Zhanjie Li, Suping Song, Kuok San Ho
  • Patent number: 10643654
    Abstract: A method according to one embodiment includes running a magnetic recording tape over a tape bearing surface of a module having at least one edge, detecting signals from the tape at differing wrap angles for estimating a height of tenting of the tape above a transducer at each of the wrap angles, and selecting a wrap angle to provide about a predefined height of tenting of the tape above the transducer. A resulting tent of the moving magnetic recording tape extends from the edge of the module closest thereto to a minima with a tent apex therebetween, where the minima is at a first point of closest approach of the moving magnetic recording tape to the tape bearing surface of the module nearest the tent apex.
    Type: Grant
    Filed: June 18, 2019
    Date of Patent: May 5, 2020
    Assignee: International Business Machines Corporation
    Inventors: Robert G. Biskeborn, W. Stanley Czarnecki, Calvin S. Lo
  • Patent number: 10643653
    Abstract: In one embodiment, a method includes determining a distance from a to an edge closest thereto and selecting a wrap angle based on the determined distance for inducing tenting of a moving magnetic recording tape in a region above the transducer whereby a resulting tent of the moving tape extends from the edge closest thereto to a minima with a tent apex therebetween. In response to a determination to move the tape over the tape bearing surface, the method includes moving the tape over the tape bearing surface, and checking for changes in the tenting characteristics. In response to determining changes are present, the method includes sequentially selecting a different wrap angle based on the determined distance for inducing a desired tenting characteristic, and checking for changes in the tenting characteristics. Moreover, the method includes selecting a final wrap angle in response to determining no significant changes are present.
    Type: Grant
    Filed: June 18, 2019
    Date of Patent: May 5, 2020
    Assignee: International Business Machines Corporation
    Inventors: Robert G. Biskeborn, W. Stanley Czarnecki, Calvin S. Lo
  • Patent number: 10636439
    Abstract: The present disclosure generally relates to data storage devices, and more specifically, to a magnetic media drive employing a magnetic recording head. The head includes a trailing shield, a main pole, a MAMR stack disposed between the trailing shield and the main pole, side shields surrounding at least a portion of the main pole, and a structure disposed between the side shields and the main pole at a media facing surface (WS). The structure is fabricated from a material that is thermally conductive and electrically insulating/dissipative. The material has a thermal conductivity of at least 50 W/(m*K) and an electrical resistivity of at least 105 ?*m. The structure helps dissipate joule heating generated from either the main pole or the MAMR stack into surrounding area without electrical shunting, leading to reduced heating or break-down induced failures.
    Type: Grant
    Filed: February 14, 2019
    Date of Patent: April 28, 2020
    Assignee: Western Digital Technologies, Inc.
    Inventors: Quang Le, Hongquan Jiang, Ning Shi, Alexander M. Zeltser
  • Patent number: 10636444
    Abstract: An apparatus includes a first magnetic layer. A second magnetic layer overlies the first magnetic layer and is magnetically softer than the first magnetic layer. An exchange control layer is between the first magnetic layer and the second magnetic layer. The includes a higher Ms (saturation magnetization) than the first magnetic layer at room temperature.
    Type: Grant
    Filed: February 20, 2019
    Date of Patent: April 28, 2020
    Assignee: SEAGATE TECHNOLOGY LLC
    Inventors: Thomas Young Chang, Thomas P. Nolan
  • Patent number: 10629227
    Abstract: An embodiment of the invention provides a phonorecord for embodying an audio recording. The phonorecord can comprise a substrate and a conformal coating disposed on at least a portion of the substrate. The substrate can comprise one or more grooves embodying the audio recording.
    Type: Grant
    Filed: August 12, 2016
    Date of Patent: April 21, 2020
    Assignees: Georgia Tech Research Corporation, Olympic Studio LLC
    Inventors: William Jud Ready, Brent Karl Wagner, Joseph Henry Burnett, Barak Moffitt
  • Patent number: 10629237
    Abstract: A magnet structure includes first and second magnet units. The first magnet unit is provided with a first magnet fixing section that includes a first surface and a first magnet having a first polarity on the first surface's side. The second magnet unit is provided with a second magnet fixing section that includes a second surface and a second magnet having a second polarity on the second surface's side, the second polarity being an opposite polarity to the first polarity. The first and second surfaces are located next to one another on the same plane to form a magnetic attachment surface which is magnetically attached to a magnetically-attached object. The second magnet unit is supported by the first magnet unit so as to move in a predetermined range.
    Type: Grant
    Filed: March 6, 2019
    Date of Patent: April 21, 2020
    Assignee: JVC KENWOOD CORPORATION
    Inventors: Shigehiko Iwama, Makoto Itonaga, Yuichi Hasegawa, Koji Tsujita, Masayuki Ono, Katsue Horikoshi
  • Patent number: 10622027
    Abstract: Disclosed herein is a magnetic storage device that comprises a housing having a base and a cover. The base includes a bottom portion and side portions that define an interior cavity for maintaining magnetic disks. The side portions form a top surface configured to receive the cover. The magnetic storage device also includes a continuous gasket disposed between the cover and the top surface. The continuous gasket is formed with at least a first region having a first cross-sectional profile, and a second region having a second cross-sectional profile. The magnetic storage device also includes an adhesive disposed between the continuous gasket and the top surface and configured to bond the continuous gasket to the base.
    Type: Grant
    Filed: November 28, 2018
    Date of Patent: April 14, 2020
    Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.
    Inventors: Jiro Kaneko, Yoshiya Usami, Yuichi Arai
  • Patent number: 10612584
    Abstract: A fluid dynamic bearing device includes a shaft disposed along a center axis, a sleeve cylindrically extending around the shaft, a thruster that closes a lower end of the sleeve, dynamic pressure grooves in the shaft or the sleeve, and a lubricating oil present therebetween. The shaft includes a shaft main body and a shaft flange extending radially outward from a lower end of the shaft main body. An inner peripheral surface of the sleeve includes a first inner peripheral surface that faces an outer peripheral surface of the shaft main body in the radial direction and a second inner peripheral surface that faces an outer peripheral surface of the shaft flange in the radial direction. The sleeve includes a sleeve inner lower surface and a circulation hole.
    Type: Grant
    Filed: May 3, 2019
    Date of Patent: April 7, 2020
    Assignee: NIDEC CORPORATION
    Inventors: Kazuhiro Sato, Katsuya Takahashi
  • Patent number: 10614838
    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: August 23, 2018
    Date of Patent: April 7, 2020
    Assignee: SEAGATE TECHNOLOGY LLC
    Inventors: Victor Sapozhnikov, Taras Grigorievich Pokhil, Mohammed Shariat Ullah Patwari
  • Patent number: 10614849
    Abstract: A heat-assisted magnetic recording medium includes a substrate, an underlayer, and a magnetic layer including an alloy having a L10 crystal structure and first and second layers, arranged in this order. Each of the first and second layers has a granular structure including C, SiO2, and BN at grain boundaries. Vol % of the grain boundaries in each of the first and second layers is 25 to 45 vol %. Vol % of C in the first layer is 5 to 22 vol %, and a volume ratio of SiO2 with respect to BN in each of the first and second layers is 0.25 to 3.5. Vol % of SiO2 in the second layer is greater than that of the first layer by 5 vol % or more. Vol % of BN in the second layer is smaller than that in the first layer by 2 vol % or more.
    Type: Grant
    Filed: July 23, 2019
    Date of Patent: April 7, 2020
    Assignee: SHOWA DENKO K.K.
    Inventors: Takayuki Fukushima, Koji Take, Hisato Shibata, Takehiro Yamaguchi, Tomoo Shige, Lei Zhang, Chen Xu, Yuji Umemoto, Hiroshi Koyanagi, Kazuya Niwa, Tetsuya Kanbe
  • Patent number: 10614837
    Abstract: A method according to one embodiment includes forming a bearing surface slot in an end of a section of a thin film wafer at a location that defines a tape bearing surface extending between the bearing surface slot and portions of transducers exposed on the end. The section has a plurality of rows of transducers formed on a substrate. A row is sliced from the section, the row having the end and bearing surface slot.
    Type: Grant
    Filed: February 8, 2019
    Date of Patent: April 7, 2020
    Assignee: International Business Machines Corporation
    Inventors: Robert G. Biskeborn, Calvin S. Lo