Disk Patents (Class 360/135)
  • Patent number: 10375433
    Abstract: The present invention provides an audiovisual access criterion updating method, for updating an audiovisual access criterion in an audiovisual access criterion managing device, the audiovisual access criterion managing device managing the audiovisual access criterion of a content signal, the audiovisual access criterion updating method includes: a step of receiving update information descriptive of update content of the audiovisual access criterion and identification information of the audiovisual access criterion managing device by an updating code generating system; a step of generating an updating code by the updating code generating system according to the update information and the identification information; a step of receiving the updating code by the audiovisual access criterion managing device; and a step of updating the audiovisual access criterion by the audiovisual access criterion managing device according to the updating code.
    Type: Grant
    Filed: August 4, 2017
    Date of Patent: August 6, 2019
    Assignee: SMART MOBILE BROADCASTING TECHNOLOGY, INC.
    Inventors: Tomoyuki Oya, Toshimi Morizumi, Yuri Seki
  • Patent number: 10371178
    Abstract: A drive pulley (12) is formed by a piston-cylinder mechanism in which a seal ring (15) is set on an outer periphery of a fixed piston plate (16) that is in sliding contact with a cylinder inner peripheral surface (12d) of a cylinder (12b), and is driven by being supplied with hydraulic pressure. As a control parameter of a surface roughness shape of the cylinder inner peripheral surface (12d) of the drive pulley (12), a kurtosis (Rku) of a roughness curve and a skewness (Rsk) of the roughness curve, each of which is a height direction characteristic average parameter, are used. The cylinder inner peripheral surface (12d) is set to a surface having a surface roughness shape whose measurement values of the kurtosis (Rku) and the skewness (Rsk) are predetermined respective control values or less. With this, it is possible to surely suppress sliding abrasion of the liquid-tight seal member.
    Type: Grant
    Filed: December 19, 2013
    Date of Patent: August 6, 2019
    Assignee: JATCO LTD
    Inventors: Takeshi Kurihara, Yoshihiro Oyama, Yoichi Tsuji
  • Patent number: 10360930
    Abstract: According to one embodiment, in a disk device, the head includes a first read element and a second read element. The disk medium is partitioned into a plurality of zones. The plurality of zones include a first zone and a second zone. The first zone includes a plurality of tracks on each of which a servo area and a data area are placed, a servo burst region in the servo area from which to detect the amount of off-track of the head from the center of a track, having a first bit length. The second zone includes a plurality of tracks on each of which a servo area and a data area are placed, a servo burst region in the servo area from which to detect the amount of off-track of the head from the center of a track, having a second bit length shorter than the first bit length.
    Type: Grant
    Filed: August 29, 2018
    Date of Patent: July 23, 2019
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
    Inventors: Makoto Asakura, Naoki Tagami, Takeyori Hara
  • Patent number: 10339965
    Abstract: A thermally assisted magnetic recording head has a waveguide that propagates laser light as propagating light; a main pole that has a first end portion on an air bearing surface (ABS) facing a magnetic recording medium and that emits a magnetic flux to the magnetic recording medium; a metal layer that is positioned between the main pole and the waveguide, that extends from a second end portion positioned on the ABS in a height direction, that generates surface plasmons from the propagating light, and that generates near-field light (NF light) from the surface plasmons at the second end portion; and a dielectric body layer that is surrounded by the metal layer and that extends from a third end portion positioned on the ABS in a height direction.
    Type: Grant
    Filed: January 26, 2017
    Date of Patent: July 2, 2019
    Assignee: TDK Corporation
    Inventors: Yuki Nishimura, Norikazu Ota
  • Patent number: 10319397
    Abstract: Narrow band dwell occurs when air bearings corresponding to a set of read and/or write heads within a hard disc drive remain within a fixed narrow band of one or more storage platters for an extended period of time. The air bearings displace lubricant on the storage platters and may redeposit the lubricant as droplets on the platters. The presently disclosure technology is directed to monitoring a hard disc drive for narrow band dwell, and in some implementations, implementing operations to mitigate narrow band dwell. More specifically, the presently disclosure technology may detect an overflying air-bearing slider position, apply a lubrication film displacement formula to a narrow band of the storage platter, apply a lubrication film reflow formula to one or more other narrow bands of the storage platter, and track lubrication film thickness over time in each of the narrow bands of the storage platter.
    Type: Grant
    Filed: May 4, 2018
    Date of Patent: June 11, 2019
    Assignee: SEAGATE TECHNOLOGY LLC
    Inventors: Scott E. Ryun, Brian R. Pollock, Ryan Todd Lyle, Ryan Thomas Herbison, Richard Arthur Herr, Paul W. Burnett
  • Patent number: 10304492
    Abstract: The invention generally relates to hard disk drives with a disk and a read/write head, and methods for preventing contact between the disk and the read/write head. The hard disk drive includes a z-axis actuator configured to control movement of the read/write head, and to prevent contact between the read/write head and the disk, based on signals from a controller that indicate when the distance between the read/write head and the disk are outside a predetermined range, such as between 0 and 10.0 nm.
    Type: Grant
    Filed: December 20, 2017
    Date of Patent: May 28, 2019
    Assignee: L2 Drive Inc.
    Inventor: Karim Kaddeche
  • Patent number: 10236025
    Abstract: Provided are an evaluation method of a magnetic tape, in which the magnetic tape which is an evaluation target includes a magnetic layer including a servo pattern, the method including: reading the servo pattern by a magnetic head including a tunnel magnetoresistance effect type element as a servo pattern reading element; measuring electric resistance of the tunnel magnetoresistance effect type element after the reading; and determining quality of the magnetic tape by using a degree of a decrease in the measured electric resistance from a reference value as an index, and a manufacturing method of a magnetic tape including: evaluating the magnetic tape including a servo pattern in a magnetic layer by the evaluation method.
    Type: Grant
    Filed: December 26, 2017
    Date of Patent: March 19, 2019
    Assignee: FUJIFILM Corporation
    Inventors: Tetsuya Kaneko, Norihito Kasada, Eiki Ozawa
  • Patent number: 10204652
    Abstract: An optical recording medium includes a light-receiving surface that receives incident light and at least three information signal layers on which information signals are to be optically recorded. Among the at least three information signal layers, the information signal layer closest to the light-receiving surface has a reflectance in a range of 4% to 11%.
    Type: Grant
    Filed: March 5, 2018
    Date of Patent: February 12, 2019
    Assignee: SONY CORPORATION
    Inventors: Yo Ota, Kensaku Takahashi, Manami Miyawaki
  • Patent number: 10199063
    Abstract: Disclosed is a perpendicularly magnetized film structure that uses a highly heat resistant underlayer film on which a cubic or tetragonal perpendicularly magnetized film can grow with high quality, the structure comprising any one substrate (5) of a cubic single crystal substrate having a (001) plane, or a substrate having a cubic oriented film that grows to have the (001) plane; an underlayer (6) formed on the substrate (5) from a thin film of a metal having an hcp structure, such as Ru or Re, in which the [0001] direction of the thin metal film forms an angle in the range of 42° to 54° with respect to the <001> direction or the (001) orientation of the substrate (5); and a perpendicularly magnetized layer (7) located on the metal underlayer (6) and formed from a cubic material selected from the group consisting of a Co-based Heusler alloy, a cobalt-iron (CoFe) alloy having a bcc structure, and the like, as a constituent material, and grown to have the (001) plane.
    Type: Grant
    Filed: March 19, 2015
    Date of Patent: February 5, 2019
    Assignee: NATIONAL INSTITUTE FOR MATERIALS SCIENCE
    Inventors: Hiroaki Sukegawa, Zhenchao Wen, Seiji Mitani, Koichiro Inomata, Takao Furubayashi, Jason Paul Hadorn, Tadakatsu Ohkubo, Kazuhiro Hono, Jungwoo Koo
  • Patent number: 10184092
    Abstract: A lubricant including: an ionic liquid, which includes a conjugate acid (B+) and a conjugate base (X?), and is protic, wherein the ionic liquid is represented by the following general formula (1), and wherein the conjugate base is a conjugate base of sulfonic acid, a conjugate base of sulfonimide, or a conjugate base of trisulfonylmethide: where R1 and R2 each represent a hydrogen atom or R1 and R2 form a benzene ring together with carbon atoms to which R1 and R2 are bonded, R3 represents a to straight-chain hydrocarbon group having 10 or more carbon atoms, and R4 represents a hydrogen atom or a hydrocarbon group in the general formula (1).
    Type: Grant
    Filed: May 18, 2015
    Date of Patent: January 22, 2019
    Assignee: DEXERIALS CORPORATION
    Inventors: Hirofumi Kondo, Kouki Hatsuda, Makiya Ito, Nobuo Tano, Kyungsung Yun, Masayoshi Watanabe
  • Patent number: 10150691
    Abstract: According to one embodiment, a glass article may include SiO2, Al2O3, Li2O and Na2O. The glass article may have a softening point less than or equal to about 810° C. The glass article may also have a high temperature CTE less than or equal to about 27×10?6/° C. The glass article may also be ion exchangeable such that the glass has a compressive stress greater than or equal to about 600 MPa and a depth of layer greater than or equal to about 25 ?m after ion exchange in a salt bath comprising KNO3 at a temperature in a range from about 390° C. to about 450° C. for less than or equal to approximately 15 hours.
    Type: Grant
    Filed: August 12, 2015
    Date of Patent: December 11, 2018
    Assignee: CORNING INCORPORATED
    Inventors: Marie Jacqueline Monique Comte, Melinda Ann Drake, Karen Leslie Geisinger, Sinue Gomez, Robert Michael Morena, Charlene Marie Smith, Randall Eugene Youngman
  • Patent number: 10106757
    Abstract: A lubricant, which includes an ionic liquid including a conjugate base and a conjugate acid, wherein the conjugate acid is represented by General Formula (A) below, and wherein a pKa of an acid that is a source of the conjugate base in acetonitrile is 10 or less, where, in General Formula (A), R1, R2, and R3 are each independently a group including a hydrocarbon group, with the proviso that at least one of the hydrocarbon groups in R1, R2, and R3 is a straight-chain hydrocarbon group having 6 or greater carbon atoms.
    Type: Grant
    Filed: April 12, 2017
    Date of Patent: October 23, 2018
    Assignee: DEXERIALS CORPORATION
    Inventors: Hirofumi Kondo, Kouki Hatsuda, Nobuo Tano, Pankaj Baghel
  • Patent number: 10090014
    Abstract: A magnetic recording medium for heat assisted magnetic recording (HAMR) including in ascending vertical sequence: (i) a substrate; (ii) a first amorphous layer, a first seed layer, or a combination thereof; (iii) a heat sink layer comprising hexagonal boron-nitride grains; (iv) an optional second amorphous layer; (v) an optional second seed layer; (vi) a magnetic recording layer; (vii) an optional capping layer; and (viii) an optional overcoat layer; wherein: the magnetic recording medium has a substrate plane and a basal plane perpendicular to the substrate plane; the heat sink layer is anisotropic and has an a-axis thermal conductivity in the basal plane and a c-axis thermal conductivity in the substrate plane, wherein the a-axis thermal conductivity is greater than the c-axis thermal conductivity; and the hexagonal boron-nitride grains have an average size of at least about 10 nm in the substrate plane. Also, provided is a method of manufacturing the magnetic recording medium for HAMR.
    Type: Grant
    Filed: November 15, 2017
    Date of Patent: October 2, 2018
    Assignee: Western Digital Technologies, Inc.
    Inventors: Antony Ajan, Kumar Srinivasan, Ning Ye
  • Patent number: 10089189
    Abstract: Devices and methods for receiving a data file in a communication system. In one embodiment, the wireless communication device includes a transceiver, a memory, and an electronic processor. The transceiver is configured to send and receive data over a wireless communication network. The electronic processor is electrically coupled to the transceiver and the memory and configured to receive, with the transceiver, a first seed, a sequence of blocks, and a subsequent seed, cause the memory to save the sequence of blocks in the memory, and determine whether the subsequent seed is aligned with the first seed. When the subsequent seed is not aligned with the first seed, the electronic processor is configured to cause the memory to delete the sequence of blocks. When the subsequent seed is aligned with the first seed, the electronic processor is configured to cause the memory to maintain the sequence of blocks.
    Type: Grant
    Filed: April 15, 2016
    Date of Patent: October 2, 2018
    Assignee: MOTOROLA SOLUTIONS, INC.
    Inventors: Harish Natarahjan, Graeme Peter Johnson, Daniel J. McDonald
  • Patent number: 9997209
    Abstract: Provided are a power failure protection method and solid state drive (SSD). The SSD comprises: a power-failure detection device, for monitoring in real time whether the power supply is abnormal; a power-failure protection device performs a power-failure protection operation when the power supply is monitored to be abnormal: breaking a connection with a host system bus, an SSD internal clock breaking from a system bus clock and writing data in the SSD cache into a storage unit of the SSD by using the SSD internal clock. The technical solution ensures completion of the data protection operations by utilizing a remaining capacity, thus ensuring data integrity.
    Type: Grant
    Filed: January 8, 2015
    Date of Patent: June 12, 2018
    Assignee: SHANNON SYSTEMS LTD.
    Inventors: Zhen Zhou, Xueshi Yang
  • Patent number: 9926508
    Abstract: A lubricant including an ionic liquid, which includes a conjugate acid (B+) and a conjugate base (X?), and is protic, wherein the conjugate acid includes a straight-chain hydrocarbon group having 10 or more carbon atoms, and wherein the conjugate base is represented by the following general formula (1): where n is an integer of from 0 to 6 in the general formula (1).
    Type: Grant
    Filed: April 28, 2015
    Date of Patent: March 27, 2018
    Assignee: DEXERIALS CORPORATION
    Inventors: Hirofumi Kondo, Kouki Hatsuda, Makiya Ito, Nobuo Tano, Kyungsung Yun, Masayoshi Watanabe
  • Patent number: 9916849
    Abstract: An optical power level applied via a laser when recording data to a track of a heat-assisted recording medium is determined. In response to the optical power level being too low or too high, remedial action is taken to prevent loss of data on one or more of the track and an adjacent track.
    Type: Grant
    Filed: November 9, 2016
    Date of Patent: March 13, 2018
    Assignee: SEAGATE TECHNOLOGY LLC
    Inventors: Drew Michael Mader, Tim Rausch, James E. Angelo
  • Patent number: 9911451
    Abstract: An optical recording medium includes a plurality of information signal layers on which information signals are to be optically recorded. Among the plurality of information signal layers, the information signal layer closest to the light-receiving surface has a reflectance of more than 4%.
    Type: Grant
    Filed: January 28, 2015
    Date of Patent: March 6, 2018
    Assignee: SONY CORPORATION
    Inventors: Yo Ota, Kensaku Takahashi, Manami Miyawaki
  • Patent number: 9899046
    Abstract: A method of testing anti-high temperature performance of a magnetic head comprises applying a plurality of second magnetic fields with different intensities in a second direction to the magnetic head, and measuring a second output parameter curve, and judging whether a variation that is beyond an allowable value is presented on the second output parameter curve, therein the second direction passes through the ABS and at an angle whose absolute value is an acute angle to the ABS. The present invention can screen out defective magnetic heads that possess poor anti-high temperature performance without heating the magnetic head.
    Type: Grant
    Filed: April 29, 2011
    Date of Patent: February 20, 2018
    Assignee: SAE Magnetics (H.K.) Ltd.
    Inventors: Cheukman Lui, Chiuming Lueng, Hokei Lam, Mankit Lee, Kwokkam Leung, Cheukwing Leung, Juren Ding, Rongkwang Ni
  • Patent number: 9854128
    Abstract: Image forming apparatus 1 that shortens warm-up time is provided. Accordingly, image forming apparatus 1 is an asymmetrical multiprocessing configuration provided with auxiliary memory part 21 shared between main control part 10 and sub control part 11. Use area 300 is an area accessed by main control part 10. Use area 301 is an area accessed by sub control part 11. Use area specifying part 100 specifies for use area 300 and use area specifying part 101 specifies for use area 301, respectively, by use area specifying table 210. Defective area table making part 110 makes defective area table 200 by searching whether or not a defective area only for use area 300 and set as a defective area for the other area. Defective area table making part 111 makes defective area table 201 by searching use area 301, similarly, and set as the defective area for the other area.
    Type: Grant
    Filed: January 22, 2015
    Date of Patent: December 26, 2017
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Masahiro Suzuki
  • Patent number: 9779771
    Abstract: A stack includes a substrate, a magnetic recording layer comprising FePtX disposed over the substrate, and a capping layer disposed on the magnetic recording layer. The capping layer comprises Co; at least one rare earth element; one or more elements selected from a group consisting of Fe and Pt; and an amorphizing agent comprising one to three elements selected from a group consisting of B, Zr, Ta, Cr, Nb, W, V, and Mo.
    Type: Grant
    Filed: March 29, 2016
    Date of Patent: October 3, 2017
    Assignee: SEAGATE TECHNOLOGY LLC
    Inventors: Kangkang Wang, Yingguo Peng, Ganping Ju, Xiaobin Zhu, Li Gao, Yinfeng Ding, Kai Chieh Chang, Timothy J. Klemmer, Yukiko Kubota, Jan-Ulrich Thiele, Thomas P. Nolan
  • Patent number: 9697858
    Abstract: A perpendicular magnetic recording medium is disclosed in which crystal axis orientation dispersion, crystal grain diameter, and crystal grain diameter dispersion in a magnetic recording layer are reduced. The perpendicular magnetic recording medium has a structure having, stacked sequentially on a non-magnetic substrate, at least an amorphous underlayer, a lower orientation control layer made of Ru or Ru alloy of an hcp structure, an upper orientation control layer that is made of alloy containing an element selected from the group consisting of Co and Ni and an element selected from the group consisting of Cr, W, and Mo and that has an fcc or hcp structure, an intermediate layer, and a magnetic recording layer.
    Type: Grant
    Filed: February 20, 2015
    Date of Patent: July 4, 2017
    Assignee: FUJI ELECTRIC (MALAYSIA) SDN, BHD.
    Inventors: Hirohisa Oyama, Kenichiro Soma, Isamu Sugai
  • Patent number: 9697860
    Abstract: A magnetic-disk glass substrate of the present invention includes a pair of main surfaces, a side wall surface, and a chamfered surface between the main surfaces and the side wall surface. Regarding surface properties of at least one of the side wall surface and the chamfered surface of the glass substrate, an arithmetic average roughness (Ra) is 0.015 ?m or less, and a bearing factor of a roughness cross-sectional area when a roughness percentage is 60% is 95% or more in a bearing curve of a roughness cross-sectional area.
    Type: Grant
    Filed: June 28, 2013
    Date of Patent: July 4, 2017
    Assignee: HOYA CORPORATION
    Inventor: Masaaki Ueda
  • Patent number: 9691817
    Abstract: A method of forming a line of magnetic tunnel junctions includes forming magnetic recording material over a substrate, non-magnetic material over the recording material, and magnetic reference material over the non-magnetic material. The substrate has alternating outer regions of reactant source material and insulator material along at least one cross-section. The reference material is patterned into a longitudinally elongated line passing over the alternating outer regions. The recording material is subjected to a set of temperature and pressure conditions to react with the reactant of the reactant source material to form regions of the dielectric material which longitudinally alternate with the recording material along the line and to form magnetic tunnel junctions along the line which individually comprise the recording material, the non-magnetic material, and the reference material that are longitudinally between the dielectric material regions.
    Type: Grant
    Filed: January 6, 2016
    Date of Patent: June 27, 2017
    Assignee: Micron Technology, Inc.
    Inventor: Gurtej S. Sandhu
  • Patent number: 9684467
    Abstract: Methods, systems, and programs are presented for managing a storage device memory. One method includes an operation for receiving a request to pin a volume stored in the storage device. The device includes disk storage and a solid state drive (SSD) cache, where pinned volumes in the storage device have all active volume data in the SSD cache. Further, the method includes an operation for determining the maximum amount of pinnable space in the SSD cache, the maximum amount of pinnable space being calculated based on the sizes of the disk storage and the SSD cache. Further, the method includes operations for determining the available pinning space, which is the maximum amount of pinnable space minus the current amount of pinned data in the SSD cache, and for granting the request to pin the volume when the available pinning space is greater than or equal to a size of the volume.
    Type: Grant
    Filed: July 29, 2015
    Date of Patent: June 20, 2017
    Assignee: Nimble Storage, Inc.
    Inventors: Senthil Kumar Ramamoorthy, Pradeep Shetty, Mukul Kumar Singh, Hy Vu
  • Patent number: 9672862
    Abstract: According to embodiments of the present invention, a method of writing servo information on a storage medium is provided. The method includes applying heat to a servo portion of a storage medium, and applying a magnetic field to the servo portion that is heated to write servo information on the servo portion. According to further embodiments of the present invention, an arrangement for writing servo information on a storage medium and a method of forming a storage medium are also provided.
    Type: Grant
    Filed: September 17, 2014
    Date of Patent: June 6, 2017
    Assignee: Marvell International Ltd.
    Inventors: Wen Huei Jack Tsai, Siang Huei Leong, Baoxi Xu
  • Patent number: 9653532
    Abstract: An on-chip magnetic structure structure includes a magnetic material comprising cobalt in a range from about 80 to about 90 atomic % (at. %) based on the total number of atoms of the magnetic material, tungsten in a range from about 4 to about 9 at. % based on the total number of atoms of the magnetic material, phosphorous in a range from about 7 to about 15 at. % based on the total number of atoms of the magnetic material, and palladium substantially dispersed throughout the magnetic material.
    Type: Grant
    Filed: July 30, 2016
    Date of Patent: May 16, 2017
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Hariklia Deligianni, William J. Gallagher, Andrew J. Kellock, Eugene J. O'Sullivan, Lubomyr T. Romankiw, Naigang Wang
  • Patent number: 9607645
    Abstract: A magnetic recording device includes: a magnetic recording medium containing a plurality of recording layers; a magnetic recording head for conducting magnetic writing of information in the magnetic recording medium; and a magnetic reproducing head for conducting magnetic reading out of the information from the magnetic recording medium; wherein the magnetic recording head includes a high frequency oscillator for magnetically assisting the magnetic writing of the information so as to change a magnetization of at least one of the plurality of recording layers of the magnetic recording medium, thereby recording a plurality of information different from one another in the magnetic recording medium commensurate with a total amount of magnetization of the plurality of recording layers.
    Type: Grant
    Filed: March 9, 2015
    Date of Patent: March 28, 2017
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hideaki Fukuzawa, Hiromi Yuasa
  • Patent number: 9595361
    Abstract: A thin film structure includes a metal seed layer, and a method of forming an oxide thin film on a conductive substrate by using the metal seed layer is disclosed. The thin film structure includes a transparent conductive substrate, a metal seed layer that is deposited on the transparent conductive substrate, and a metal oxide layer that is deposited on the metal seed layer.
    Type: Grant
    Filed: July 22, 2014
    Date of Patent: March 14, 2017
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hyeon-jin Shin, Seong-jun Park, Jae-ho Lee, Seong-Jun Jeong
  • Patent number: 9595282
    Abstract: According to one embodiment, a magnetic medium includes a substrate, and a magnetic recording layer positioned above the substrate, the magnetic recording layer including an ordered alloy having a L10-type structure, where the ordered alloy comprises a plurality of ferromagnetic crystal grains surrounded by non-magnetic grain boundaries, and where the ordered alloy comprises Fe, Ni and Pt.
    Type: Grant
    Filed: January 28, 2015
    Date of Patent: March 14, 2017
    Assignee: HGST Netherlands B.V.
    Inventors: Junichi Sayama, Yoshiyuki Hirayama
  • Patent number: 9548076
    Abstract: A magnetic device including a magnetic writer; and an overcoat positioned over at least the magnetic writer, the overcoat including oxides of yttrium, oxides of scandium, oxides of lanthanoids, oxides of actionoids, oxides of zinc, or combinations thereof.
    Type: Grant
    Filed: November 3, 2014
    Date of Patent: January 17, 2017
    Assignee: Seagate Technology LLC
    Inventors: Xiaoyue Huang, Seung-Yeul Yang, Steve Riemer, Michael C. Kautzky
  • Patent number: 9410260
    Abstract: A method of forming a nano-structure involves forming a multi-layered structure including an oxidizable material layer established on a substrate, and another oxidizable material layer established on the oxidizable material layer. The oxidizable material layer is an oxidizable material having an expansion coefficient, during oxidation, that is more than 1. Anodizing the other oxidizable material layer forms a porous anodic structure, and anodizing the oxidizable material layer forms a dense oxidized layer and nano-pillars which grow through the porous anodic structure into pores thereof. The porous structure is selectively removed to expose the nano-pillars. A surface (I) between the dense oxidized layer and a remaining portion of the oxidizable material layer is anodized to consume a substantially cone-shaped portion of the nano-pillars to form cylindrical nano-pillars.
    Type: Grant
    Filed: October 21, 2010
    Date of Patent: August 9, 2016
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Peter Mardilovich, Qingqiao Wei, Anthony M. Fuller
  • Patent number: 9368131
    Abstract: A data storage device is disclosed wherein when a first head is over a top disk surface, a first undershoot of a first cross-track profile is closer to an inner diameter of a disk and a second undershoot of the first cross-track profile is closer to an outer diameter of the disk. When a second head is over a bottom disk surface, a second undershoot of a second cross-track profile is closer to the inner diameter of the disk and a first undershoot of the second cross-track profile is closer to the outer diameter of the disk.
    Type: Grant
    Filed: April 3, 2015
    Date of Patent: June 14, 2016
    Assignee: Western Digital (Fremont), LLC
    Inventors: Kathy X. Tang, Xiao Z. Wu, Hong Pan
  • Patent number: 9343144
    Abstract: According to one embodiment, a memory device includes a plurality of global column lines arranged in parallel and extending in a first direction; a plurality of row lines extending in a second direction which is perpendicular to the first direction; a plurality of column lines in a two-dimensional arrangement, which extend in a third direction which is perpendicular to the first direction and the second direction; and a memory cell array including a plurality of memory cells arranged at intersections between the row lines and the column lines.
    Type: Grant
    Filed: July 27, 2015
    Date of Patent: May 17, 2016
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventor: Kenichi Murooka
  • Patent number: 9252020
    Abstract: Proposed are a composite material having a high adhesiveness, wherein non-penetrating pores that are formed in a silicone surface layer are filled up with a metal or the like without leaving any voids by using the plating technique and the silicone surface layer is coated with the metal or the like, and a method of producing the composite material. A composite material, which has a high adhesiveness between a second metal or an alloy of the second metal (106a, 106b) and a silicone surface, can be obtained by filling up non-penetrating pores that are formed in the surface of a silicone substrate (100) substantially with a second metal or an alloy of the second metal (106a) with the use of the autocatalytic electroless plating technique wherein a first metal located at the bottom of the non-penetrating pores as described above serves as the starting point, and coating the surface of the silicone substrate (100) with the second metal (106b).
    Type: Grant
    Filed: May 1, 2013
    Date of Patent: February 2, 2016
    Assignee: Japan Science and Technology Agency
    Inventors: Shinji Yae, Tatsuya Hirano, Hitoshi Matsuda
  • Patent number: 9165571
    Abstract: A data storage system may be configured at least with a seed lamination that is disposed between a magnetic stack and a magnetic shield. The seed lamination may be constructed and operated with a coupling buffer layer and a seed layer with the coupling buffer layer fabricated of an alloy of cobalt and a transition metal.
    Type: Grant
    Filed: November 11, 2013
    Date of Patent: October 20, 2015
    Assignee: Seagate Technology LLC
    Inventors: Gabriel G. McCafferty, Sameh Sayed Ali Hassan, Marcus Ormston, Kevin A. McNeill
  • Patent number: 9117472
    Abstract: Systems, methods, and other embodiments associated with processing a read signal from a storage medium that includes continuous embedded position information are described. According to one embodiment, an apparatus includes read logic configured to control a storage device to generate the read signal by reading a first layer and a second layer of the storage medium. The first layer defines data and the second layer defines embedded position information. The apparatus includes data detection logic configured to process the read signal to recover the embedded position information. The read logic is configured to control the storage device based, at least in part, on the embedded position information.
    Type: Grant
    Filed: February 27, 2014
    Date of Patent: August 25, 2015
    Assignee: MARVELL INTERNATIONAL LTD.
    Inventors: Qiyue Zou, Michael Madden, Gregory Burd
  • Patent number: 9111565
    Abstract: Embodiments of a single data storage device with multiple different data recording media surfaces are disclosed. In one embodiment, at least one of the data recording media surfaces is conventional, such as a continuous or discrete track recording media. Another of the data recording media surfaces is a relatively high areal density, high data rate recording media, such as a bit patterned media (BPM) recording media.
    Type: Grant
    Filed: January 16, 2009
    Date of Patent: August 18, 2015
    Assignee: Seagate Technology LLC
    Inventors: Kaizhong Gao, Olle Heinonen, Wenzhong Zhu
  • Patent number: 9047906
    Abstract: The embodiments disclose a dual-layer magnetic recording structure including a top magnetic layer etched to remove patterned portions of the top magnetic layer and a bottom magnetic layer including portions with altered magnetic properties of molecules to reduce net magnetic moments and including portions of unaltered magnetic properties exchange-coupled through the top magnetic layer.
    Type: Grant
    Filed: September 28, 2012
    Date of Patent: June 2, 2015
    Assignee: Seagate Technology, LLC
    Inventor: Zhaohui Fan
  • Patent number: 9042053
    Abstract: A magnetic recording medium including a substrate, and at least one magnetic layer formed on the substrate. The magnetic layer is formed from an alloy containing Cobalt, and Platinum (Pt). The magnetic layer is also formed from grain boundary segregation materials comprising Manganese Oxide and at least one of Silicon Oxide, Chromium Oxide, and Cobalt Oxide (CoO).
    Type: Grant
    Filed: June 24, 2014
    Date of Patent: May 26, 2015
    Assignee: WD Media, LLC
    Inventors: Yang Yang, Iwao Okamoto
  • Patent number: 9036289
    Abstract: A magnetic storage medium is formed of magnetic nanoparticles that are encapsulated within nanotubes (e.g., carbon nanotubes).
    Type: Grant
    Filed: August 1, 2014
    Date of Patent: May 19, 2015
    Assignee: Sigma Pro Ltd. LLC
    Inventor: Tyson York Winarski
  • Publication number: 20150116690
    Abstract: A method is disclosed that includes forming at least one substrate alignment mark and at least one lithography alignment mark in a substrate; forming a seed layer on the substrate; and forming a guide pattern and at least one guide pattern alignment mark in the seed layer, where the at least one guide pattern alignment mark is formed over the at least one substrate alignment mark. The method further includes determining an alignment error of the at least one guide pattern alignment mark relative to the at least one substrate alignment mark; and patterning features on at least one region of the substrate, where the features are positioned on the substrate based on the at least one lithography alignment mark and the alignment error.
    Type: Application
    Filed: October 31, 2013
    Publication date: April 30, 2015
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: HongYing Wang, Kim Y Lee, Yautzong Hsu, Nobuo Kurataka, Gennady Gauzner, Shuaigang Xiao
  • Publication number: 20150109703
    Abstract: A magnetic disk substrate highly reliable to prevent the occurrence of crash failure even if a magnetic disk is rotated at high speed, and suitable for a hard disk that starts and stops by the load/unload method, and a magnetic disk using such a substrate. The representative structure of the magnetic disk substrate is a disk-shaped glass substrate 10 having a generally flat main surface 11, an end face 12, a chamfered face 13 formed between the main surface 11 and the end face 12, and an offset portion, at the periphery of the main surface 11, raised or lowered with respect to a flat surface, other than the periphery, of the main surface 11, and characterized in that the magnitude of the offset portion is approximately uniform over the entire circumference of the glass substrate 10.
    Type: Application
    Filed: November 24, 2014
    Publication date: April 23, 2015
    Applicants: HOYA GLASS DISK (Thailand) LTD., HOYA CORPORATION
    Inventors: Toshio TAKIZAWA, Kraisorn PHANDON, Kenichi NISHIMORE
  • Patent number: 9013832
    Abstract: A perpendicular magnetic recording medium includes a nonmagnetic substrate, an underlayer provided above the nonmagnetic substrate, and a perpendicular recording layer provided above the underlayer. The perpendicular recording layer includes a first magnetic layer including Co and Pt and having a granular structure, and a second magnetic layer having magnetic and ferroelectric properties.
    Type: Grant
    Filed: June 6, 2014
    Date of Patent: April 21, 2015
    Assignee: Showa Denko K.K.
    Inventors: Akira Sakawaki, Akira Yamane
  • Patent number: 9005781
    Abstract: A perpendicular recording medium having a perpendicular magnetic recording layer and a magnetically soft underlayer structure disposed beneath the recording layer. The soft underlayer structure includes at least first and second soft magnetic layers having different magnetic permeabilities to create a magnetic permeability gradient in the soft underlayer structure. One or more of the soft magnetic layers can be antiparallel coupled. The soft underlayer structure of the present invention having a magnetic permeability gradient advantageously leads to reduced adjacent track erasure (ATE) while maintaining good overwrite (OW) properties.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: April 14, 2015
    Assignee: Seagate Technology LLC
    Inventors: Jianing Zhou, B. Ramamurthy Acharya, E. Noel Abarra, Gunn Choe
  • Patent number: 9007880
    Abstract: A thermally assisted magnetic recording medium (1) includes a substrate (101), an underlayer (3) that is formed above the substrate (101), and a magnetic layer (107) that is formed on the underlayer (3) and contains an alloy having an L10 structure as a main component. The underlayer (3) is formed by continuously laminating a first underlayer (104) having a BCC structure with a lattice constant that is 0.302 to 0.332 nm, a second underlayer (105) that has a NaCl structure including C, and a third underlayer (106) that is composed of MgO.
    Type: Grant
    Filed: April 30, 2013
    Date of Patent: April 14, 2015
    Assignee: Showa Denko K.K.
    Inventors: Tetsuya Kanbe, Kazuya Niwa, Yuji Murakami, Lei Zhang
  • Patent number: 9007878
    Abstract: An aspect of the present invention relates to glass for a magnetic recording medium substrate, which includes essential components in the form of SiO2, Li2O, Na2O, and one or more alkaline earth metal oxides selected from the group consisting of MgO, CaO, SrO, and BaO, wherein a molar ratio of a content of MgO to a combined content of MgO, CaO, SrO, and BaO (MgO/(MgO+CaO+SrO+BaO)) is equal to or greater than 0.80, and which has a Young's modulus of equal to or greater than 80 GPa, and a glass transition temperature of equal to or greater than 620° C.
    Type: Grant
    Filed: July 25, 2014
    Date of Patent: April 14, 2015
    Assignee: Hoya Corporation
    Inventors: Naomi Matsumoto, Kazuaki Hashimoto
  • Patent number: 8995089
    Abstract: According to one embodiment, there is provided a magnetic recording medium which includes a base, a magnetic recording layer having convex-shaped magnetic layers, which is formed on the base, and a protective film formed on the magnetic recording layer. There are gaps in a region surrounded by the protective film, the surface of the base, and each side wall of each magnetic layer.
    Type: Grant
    Filed: July 17, 2013
    Date of Patent: March 31, 2015
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Kazutaka Takizawa, Akira Watanabe, Kaori Kimura, Tsuyoshi Onitsuka, Takeshi Iwasaki, Masahiro Takashita, Akihiko Takeo
  • Publication number: 20150085401
    Abstract: An HDD includes a magnetic head, and a magnetic recording medium. The recording medium includes a recording magnetic layer, and a recording assist magnetic layer, the recording assist magnetic layer generates a high-frequency magnetic field by means of a recording field from the magnetic head, and a recording assist action acts on the recording magnetic layer.
    Type: Application
    Filed: September 26, 2013
    Publication date: March 26, 2015
    Applicant: HGST Netherlands B.V.
    Inventors: Hiroaki Nemoto, Ichiro Tamai, Tatsuya Hinoue, Yuzuru Hosoe
  • Patent number: 8988828
    Abstract: A magnetic recording medium includes a substrate, a magnetic layer including an alloy having an L10 type crystal structure, and a plurality of underlayers arranged between the substrate and the magnetic layer. At least one of the plurality of underlayers is a soft magnetic underlayer formed by an alloy having a hexagonal close packed (hcp) structure and including Co metal or Co as its main component, with a (11•0) plane oriented parallel to a surface of the substrate.
    Type: Grant
    Filed: June 27, 2014
    Date of Patent: March 24, 2015
    Assignee: Showa Denko K.K.
    Inventors: Tetsuya Kanbe, Kazuya Niwa, Yuji Murakami, Lei Zhang