Record Medium Patents (Class 360/131)
  • Patent number: 10692523
    Abstract: Provided is a manufacturing method of a magnetic recording medium, in which the magnetic recording medium includes a magnetic layer including ferromagnetic powder and a binding agent on a non-magnetic support, and the magnetic layer shows a natural ferromagnetic resonance frequency equal to or greater than 30.0 GHz, the method including: forming a servo pattern on the magnetic layer by microwave-assisted recording.
    Type: Grant
    Filed: July 17, 2018
    Date of Patent: June 23, 2020
    Assignee: FUJIFILM Corporation
    Inventor: Eiki Ozawa
  • Patent number: 10614841
    Abstract: A thermally assisted magnetic head includes a slider, the slider includes a slider substrate and a magnetic head part. The magnetic head part includes a medium-opposing surface opposing a magnetic recording medium, a light source-opposing surface arranged rear side of the medium-opposing surface, an anti-reflection film formed on the light source-opposing surface, a core layer and a cladding layer. The anti-reflection film includes a stacked structure which a first layer and a second layer are stacked. The second layer is formed with high refractive index dielectric having the refractive index higher than the first layer.
    Type: Grant
    Filed: November 30, 2018
    Date of Patent: April 7, 2020
    Assignee: SAE MAGNETICS (H.K.) LTD.
    Inventors: Ryo Hosoi, Seiichi Takayama, Natsuo Nishijima, Takashi Honda
  • Patent number: 10489615
    Abstract: An intermetallic or iron aluminide magnetically readable medium and a method of forming and reading the same are provided herein. Also provided is an identification card or tag, a key, an anti-counterfeiting measure, an anti-forging measure. The intermetallic or iron aluminide magnetically readable medium includes a magnetically readable surface, wherein the magnetically readable surface contains one or more first magnetically readable regions of the intermetallic or iron aluminide surrounded by one or more second magnetically readable regions. Additionally, the intermetallic or iron aluminide magnetically readable medium can be coated, encapsulated or concealed within a material.
    Type: Grant
    Filed: July 7, 2014
    Date of Patent: November 26, 2019
    Assignee: Philip Morris USA Inc.
    Inventors: Seetharama C. Deevi, Kudumboor Venkat Rao, Valter Strom, Ziyan Gu
  • Patent number: 10474479
    Abstract: Embodiments described herein provide for system and methods to enable an operating environment that supports multi-OS applications. One embodiment provides for a non-transitory machine-readable medium storing instructions that cause a data processing system to perform operations to detect conflicts during a build process for a dynamic library, the operations comprising loading program code for the dynamic library to build for a first platform, determining a set of interfaces and data structures exported by the dynamic library for the first platform, determining a set of interfaces and data structures exported by the dynamic library for a second platform, parsing the set of interfaces and data structures to verify consistency of a build contract for the dynamic library, and generating a build error during a build process for the dynamic library upon detecting an inconsistent build contract specifying at least an application binary interface (ABI) for the dynamic library.
    Type: Grant
    Filed: August 17, 2018
    Date of Patent: November 12, 2019
    Assignee: Apple Inc.
    Inventors: Jeremiah R. Sequoia, Juergen Ributzka, Shengzhao Wu
  • Patent number: 10395684
    Abstract: A magnetic recording medium according to one embodiment includes an underlayer and a magnetic layer above the underlayer. The magnetic layer includes a first magnetic material and particulates. A protective layer is positioned above the magnetic layer, the protective layer including a second material. A magnetic recording medium according to another embodiment includes a base film and a first nonmagnetic layer above the base film. The first nonmagnetic layer has first nonmagnetic particles. A second nonmagnetic layer is positioned above the first nonmagnetic layer, the second nonmagnetic layer having second nonmagnetic particles. A magnetic layer is positioned above the second nonmagnetic layer, the magnetic layer including a magnetic material.
    Type: Grant
    Filed: May 18, 2016
    Date of Patent: August 27, 2019
    Assignee: International Business Machines Corporation
    Inventors: Robert G. Biskeborn, Calvin S. Lo
  • Patent number: 10360931
    Abstract: A magnetic recording apparatus includes a disk-shaped recording medium with a magnetic recording layer, and a recording head that magnetically writes data onto the magnetic recording layer and includes a main magnetic pole, a write shield facing the main magnetic pole and positioned with a writing gap disposed between the main magnetic pole and the write shield, and a magnetic flux control layer disposed inside the write gap between the main magnetic pole and the writing shield. The magnetic flux control layer includes a first layer including a first metal and contacting one of the main magnetic pole and the writing shield, a second control layer, and a third layer including a second metal and contacting the other one of the main magnetic pole and the writing shield. The second control layer includes a magnetic metal and contacts the first layer and the third layer.
    Type: Grant
    Filed: August 27, 2018
    Date of Patent: July 23, 2019
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATION
    Inventors: Masaya Ohtake, Akihiko Takeo, Gaku Koizumi, Yusuke Tomoda
  • Patent number: 10269381
    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 exchange control layer is magnetic and increases vertical coupling between the first magnetic layer and the second magnetic layer.
    Type: Grant
    Filed: October 25, 2017
    Date of Patent: April 23, 2019
    Assignee: Seagate Technology LLC
    Inventors: Thomas Young Chang, Thomas Patrick Nolan
  • Patent number: 10176843
    Abstract: Systems and methods for determining an occurrence of non-operation shock (NOS) in a disc drive are described. Such determining may be used to determine whether or not the disc drive should be recalibrated or compensated to account for changes induced by NOS. Determining NOS may be based at least in part on a harmonic of the spindle of the disc drive other than the first harmonic, such as a third harmonic of the spindle. In some embodiments, determining NOS may be based on the first harmonic of the spindle and at least one other harmonic of the spindle.
    Type: Grant
    Filed: January 30, 2018
    Date of Patent: January 8, 2019
    Assignee: SEAGATE TECHNOLOGY LLC
    Inventors: Xiong Liu, MingZhong Ding, ChuenBuan Lee
  • Patent number: 9916858
    Abstract: Systems and methods for determining an occurrence of non-operation shock (NOS) in a disc drive are described. Such determining may be used to determine whether or not the disc drive should be recalibrated or compensated to account for changes induced by NOS. Determining NOS may be based at least in part on a harmonic of the spindle of the disc drive other than the first harmonic, such as a third harmonic of the spindle. In some embodiments, determining NOS may be based on the first harmonic of the spindle and at least one other harmonic of the spindle.
    Type: Grant
    Filed: November 10, 2016
    Date of Patent: March 13, 2018
    Assignee: SEAGATE TECHNOLOGY LLC
    Inventors: Xiong Liu, MingZhong Ding, ChuenBuan Lee
  • Patent number: 9761357
    Abstract: According to one embodiment, a multi-layer magnetic nanoparticle includes a core; a first magnetic layer deposited on a surface of the core; and a second magnetic layer deposited on a surface of the first magnetic layer, where the core, the first magnetic layer and the second magnetic layer comprise different magnetic anisotropies and/or saturation magnetizations.
    Type: Grant
    Filed: March 13, 2014
    Date of Patent: September 12, 2017
    Assignee: International Business Machines Corporation
    Inventors: Diana J. Hellman, Pierre-Olivier Jubert
  • Patent number: 9704640
    Abstract: There is provided a chip electronic component including; a magnetic body containing magnetic metal powder; an internal coil part embedded in the magnetic body; and a plating spreading prevention part coated on a surface of the magnetic body. The plating spreading prevention part contains phosphate-based glass. Whereby, plating spread generated in the surface of the chip electronic component at the time of forming the external electrodes may be prevented.
    Type: Grant
    Filed: May 6, 2015
    Date of Patent: July 11, 2017
    Assignee: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Youn Kyu Choi, Hye Ah Kim, Yun Young Yang, Mi Jung Kang, Jae Yeol Choi
  • Patent number: 9685181
    Abstract: In the present disclosure, a method of operating a data storage apparatus is provided. The method includes writing a data signal into a portion of a data layer in a recording medium of a data storage apparatus. The method further includes determining a data layer coupling interference value arising due to interference from the data layer provided in between a sensor head and a servo layer of the recording medium in reading servo data, the data layer coupling interference value determined based on the data signal. The method further includes writing the data layer coupling interference value onto the recording medium. A corresponding data storage apparatus is provided.
    Type: Grant
    Filed: September 2, 2014
    Date of Patent: June 20, 2017
    Assignee: Marvell International Ltd.
    Inventors: Jingliang Zhang, Anmin Kong, Songhua Zhang, Zhimin Yuan
  • Patent number: 9637612
    Abstract: A method for alignment of high aspect ratio materials (HARMs) within a liquid matrix by means of magnetic particles. The application of an external magnetic field creates a forced motion of the magnetic particles. This in turn leads to a laminar flow within the matrix which imposes a drag force on the HARMs, aligning the HARMs across the matrix. The used magnetic particles eventually accumulate at one end side of the matrix container and can be removed either by an incision or an extraction process. Unlike the previously proposed methods, there is no need for the magnetic particles to be attached either physically or chemically to the HARMs. Thus, the ultimate aligned HARMs are mostly pure and free of any magnetic particles. Once the matrix is a polymeric solution, the mentioned method is capable of synthesis of aligned HARMs-polymer composites, which exhibit improved mechanical and electrical properties.
    Type: Grant
    Filed: September 8, 2014
    Date of Patent: May 2, 2017
    Assignee: FERDOWSI UNIVERSITY OF MASHHAD
    Inventors: Ehsan Moaseri, Morteza Maghrebi, Majid Baniadam
  • Patent number: 9620162
    Abstract: A data storage device is disclosed comprising a disk comprising a plurality of data sectors and a plurality of servo sectors, and a head actuated over the disk, wherein the head comprises a laser configured to heat the disk while writing data to the disk. When the head is over a first data sector not being written, a first prelase bias is applied to the laser, and when the head is over a servo sector, a second, lower prelase bias is applied to the laser. When the head is over a second data sector being written, a write bias higher than the first prelase bias is applied to the laser.
    Type: Grant
    Filed: March 31, 2016
    Date of Patent: April 11, 2017
    Inventor: Phillip S. Haralson
  • Patent number: 9574865
    Abstract: A method for detecting magnetic fields, particularly for detecting the position of objects with a preferably oblong, soft-magnetic element, which is connected to electronics, with via the electronics the impedance of the soft-magnetic material is measured, characterized in that a magnetic field is used in which by the position of an object which is located in an arrangement with the soft-magnetic material the magnetic field develops at the location of the soft-magnetic material, with the magnetic permeability ? of the soft-magnetic material adjusting, depending on the magnetic field and thus the position of the object. A respective device serves for applying the method according to the invention.
    Type: Grant
    Filed: August 12, 2011
    Date of Patent: February 21, 2017
    Assignee: MICRO-EPSILON Messtechnik GmbH & Co. KG
    Inventors: Christian Pfaffinger, Johann Hofer, Felix Mednikov, Thomas Wisspeintner, Guenter Schallmoser
  • Patent number: 9558777
    Abstract: According to one embodiment, a magnetic recording medium includes: a substrate, a seed layer positioned above the substrate, and a magnetic recording layer structure positioned above the seed layer. The magnetic recording layer structure includes: a first magnetic recording layer having a plurality of FePtCu magnetic grains and a first segregant, and a second magnetic recording layer positioned above the first magnetic recording layer, the second magnetic recording layer having a plurality of FePt magnetic grains and a second segregant, where a Curie temperature of the first magnetic recording layer is lower than a Curie temperature of the second magnetic recording layer.
    Type: Grant
    Filed: November 26, 2014
    Date of Patent: January 31, 2017
    Assignee: HGST Netherlands B.V.
    Inventors: Olav Hellwig, Shikha Jain, Oleksandr Mosendz, Hans J. Richter, Dieter K. Weller
  • Patent number: 9530445
    Abstract: A heat-assisted magnetic recording medium has a heat-sink layer, a chemically-ordered FePt alloy magnetic layer and a perovskite oxide intermediate layer between the heat-sink layer and the magnetic layer. The perovskite oxide intermediate layer may function as both a seed layer for the magnetic layer and a thermal barrier layer, as just a seed layer for the magnetic layer, or as just a thermal barrier layer. The intermediate layer is formed of a material selected from a ABO3 perovskite oxide (where A is selected from one or more of Ba, Sr and Ca and B is selected from one or more of Zr, Ce, Hf, Sn, Ir, and Nb), and a A2REBO6 rare earth double perovskite oxide (where RE is a rare earth element, A is selected from Ba, Sr and Ca, and B is selected from Nb and Ta).
    Type: Grant
    Filed: January 21, 2016
    Date of Patent: December 27, 2016
    Assignee: HGST Netherlands B.V.
    Inventors: Michael Konrad Grobis, Olav Hellwig, Bruce David Terris, Sung Hun Wee
  • Patent number: 9424872
    Abstract: Provided herein is an apparatus including a rectangular array of rectangular protrusions in a first region corresponding to a data region; and a hexagonal array of circular protrusions in a second region corresponding to a servo region, wherein a first global protrusion density for the first region is greater than a second global protrusion density for the second region. Also provided herein is a method including forming a first template; forming a second template; and cross-imprinting the first template and the second template to form a third template corresponding to the foregoing apparatus.
    Type: Grant
    Filed: July 31, 2015
    Date of Patent: August 23, 2016
    Assignee: Seagate Technologies LLC
    Inventors: Shuaigang Xiao, XiaoMin Yang, Kim Y. Lee, Yautzong Hsu, Hongying Wang
  • Patent number: 9336829
    Abstract: Various embodiments provide a recording medium. The recording medium may include: a dedicated servo layer for providing servo information, wherein the dedicated servo layer comprises a plurality of tracks, wherein a first track comprises a first servo signal of a first frequency, wherein a second track comprises a second servo signal of a second frequency, and wherein the first servo signal and the second servo signal comprise a common single tone signal.
    Type: Grant
    Filed: November 21, 2012
    Date of Patent: May 10, 2016
    Assignee: Marvell International Ltd.
    Inventors: Jingliang Zhang, Siang Huei Leong, Zhimin Yuan, Bo Liu
  • Patent number: 9240205
    Abstract: Based on thermal time constant of a head-to-media spacing of a write head, a write parameter is determined that includes at least one of: a modified laser power boost used at a beginning of writing; and a time adjustment affecting the beginning of the writing. The write parameter is applied to writing operations affecting a heat-assisted magnetic recording medium, the write parameter ensuring accurate phase lock during reading of the heat-assisted magnetic recording medium.
    Type: Grant
    Filed: February 17, 2015
    Date of Patent: January 19, 2016
    Assignee: SEAGATE TECHNOLOGY LLC
    Inventors: Kaizhong Gao, Pu-Ling Lu, Edward Charles Gage, Wenzhong Zhu
  • Patent number: 9159357
    Abstract: A storage library is described that includes a shelf system adapted to support a number of tape cartridges. The storage library further includes a tape drive adapted to read and write data to and from tape cartridges. The storage library further possesses a temporary repository near the tape drive that is adapted to facilitate an exchange of a first tape cartridge intended to be loaded in the tape drive with a second tape cartridge ready to be removed from the tape drive with a single tape picker device.
    Type: Grant
    Filed: August 14, 2013
    Date of Patent: October 13, 2015
    Assignee: Spectra Logic Corporation
    Inventors: Nathan Christopher Thompson, Matthew Thomas Starr
  • Patent number: 9117477
    Abstract: A magnetic medium for perpendicular magnetic data recording, having improved magnetic properties through use of a novel seed layer. The magnetic medium includes a substrate having a seed layer, a magnetic under-layer and a magnetic recording layer formed there-over. The seed layer includes an element selected from a first group of Cr, Co, Fe and Ni, and at least one element that is selected from the other elements of the first group or from a second group consisting of W, Mo and Ru. A buffer layer may be included between the substrate and the seed layer.
    Type: Grant
    Filed: May 8, 2013
    Date of Patent: August 25, 2015
    Assignee: HGST Netherlands B.V.
    Inventors: Akemi Hirotsune, Ikuko Takekuma, Hiroaki Nemoto
  • Patent number: 9005699
    Abstract: A method for manufacturing a magnetic recording medium includes the steps of (a) forming a perpendicular magnetic recording layer and (b) applying an ion beam to regions between tracks of the perpendicular magnetic recording layer so as to form separation regions for magnetically separating the tracks from each other. In the step (a), a continuous film layer composed of a multilayer film is formed, and CoB layers and Pd layers are laminated in the multilayer film. In the step (b), the CoB layers and the Pd layers are melted by the ion beam so as to form an alloy of metals contained in the CoB layers and the Pd layers to thereby form the separation regions.
    Type: Grant
    Filed: September 27, 2007
    Date of Patent: April 14, 2015
    Assignee: WD Media, LLC
    Inventors: Yoshiaki Sonobe, Teiichiro Umezawa, Koichi Wago
  • Patent number: 8988976
    Abstract: The embodiments disclose a patterned composite magnetic layer structure configured to use magnetic materials having differing temperature and magnetization characteristics in a recording device, wherein the patterned composite magnetic layer structure includes magnetic layers, at least one first magnetic material configured to be used in a particular order to reduce a recording temperature and configured to control and regulate coupling and decoupling of the magnetic layers and at least one second magnetic material with differing temperature characteristics is configured to control recording and erasing of data.
    Type: Grant
    Filed: October 16, 2013
    Date of Patent: March 24, 2015
    Assignee: Seagate Technology LLC
    Inventors: Xi Chen, Ganping Ju, Yingguo Peng, Timothy J. Klemmer, Yukiko Kubota, Jan-Ulrich Thiele, David S. Kuo, Kai-Chieh Chang, Kangkang Wang, Li Gao, Yinfeng Ding
  • Patent number: 8883327
    Abstract: Provided is a magnetic recording medium achieving both of reduction in switching field distribution and reduction in switching field intensity by high-frequency magnetic field, thus enabling high-density recording. Magnetic grains of the magnetic recording medium are made up of a recording layer and a resonance layer. The resonance layer is disposed closer to a protective layer 5 than the recording layer, and a magnetic material of the recording layer has anisotropy field 1.2 times or more anisotropy field of a magnetic material of the resonance layer. The magnetic material of the recording layer has saturation magnetization substantially equal to saturation magnetization of the magnetic material of the resonance layer. At the entire resonance layer and a part of the recording layer, the magnetic grains are separated from surrounding magnetic grains by a nonmagnetic material, and at a part of the recording layer, the magnetic grains are coupled with surrounding magnetic grains.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: November 11, 2014
    Assignee: Hitachi, Ltd.
    Inventors: Yoshiyuki Hirayama, Masukazu Igarashi, Katsuro Watanabe
  • Patent number: 8867322
    Abstract: Systems and methods for providing thermal barrier bilayers for heat assisted magnetic recording (HAMR) media are provided. One such HAMR medium includes a substrate, a heat sink layer on the substrate, a thermal barrier bilayer on the heat sink layer, the bilayer comprising a first thermal barrier layer on the heat sink layer and an amorphous underlayer on the first thermal barrier layer, and a magnetic recording layer on the amorphous underlayer, wherein a thermal conductivity of the first thermal barrier layer is less than a thermal conductivity of the amorphous underlayer.
    Type: Grant
    Filed: July 1, 2013
    Date of Patent: October 21, 2014
    Assignee: WD Media, LLC
    Inventors: Alexander S. Chernyshov, Hua Yuan, Bincheng Wang, Tomoko Seki, Antony Ajan, B. Ramamurthy Acharya, Gerardo A. Bertero, David Treves
  • Patent number: 8760292
    Abstract: A data entry device including a housing formed of at least two portions, data entry circuitry located within the housing, at least one case-open switch assembly operative to sense when the housing is opened and tamper indication circuitry operative to receive an input from the at least one case-open switch assembly and to provide an output indication of possible tampering with the data entry circuitry located within the housing. The at least one case-open switch assembly includes an arrangement of electrical contacts arranged on a base surface and a resiliently deformable conductive element, which defines a short circuit between at least some of the arrangement of electrical contacts only when the housing is closed.
    Type: Grant
    Filed: December 18, 2012
    Date of Patent: June 24, 2014
    Assignee: Verifone, Inc.
    Inventors: Richard H. H. Neo, Mehran Mirkazemi-Moud, John Henry Barrowman, Christian Eric Schulz
  • Patent number: 8724434
    Abstract: A magnetic recording system including follows: a recording head, a recording medium that includes a first recording medium layer, a second recording medium layer, and a substrate. The magnetic recording system includes an electric field applying device applying an electric field and a magnetic field applying device applying a magnetic field to the recording medium, a movement mechanism that moves them to an arbitrary position. The magnetic recording system has a function of controlling an applying direction of at least one of the electric field applying device and the magnetic field applying device, and the recording head is arranged at a position facing the recording medium.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: May 13, 2014
    Assignee: TDK Corporation
    Inventors: Mikio Matsuzaki, Koichi Shinohara, Tatsuo Shibata, Masashi Sahashi, Tomohiro Nozaki
  • Patent number: 8687309
    Abstract: This invention provides a magnetic recording medium excellent in terms of corrosion resistance. The magnetic recording medium comprises a magnetic recording layer, a protective layer and a lubricant layer provided on a nonmagnetic substrate, and the lubricant layer comprises a compound having a heterocyclic ring.
    Type: Grant
    Filed: July 8, 2011
    Date of Patent: April 1, 2014
    Assignee: Hitachi, Ltd.
    Inventors: Katsumi Mabuchi, Kyoko Honbo, Mina Amo
  • Patent number: 8628867
    Abstract: A perpendicular magnetic media includes a substrate, a patterned template, a seed layer and a magnetic layer. The patterned template is formed on the substrate and includes a plurality of growth sites that are evenly spaced apart from each other. The seed layer is formed over the patterned template and the exposed areas of the substrate. Magnetic material is sputter deposited onto the seed layer with one grain of the magnetic material nucleated over each of the growth sites. The grain size distribution of the magnetic material is reduced by controlling the locations of the growth sites which optimizes the performance of the perpendicular magnetic media.
    Type: Grant
    Filed: September 30, 2010
    Date of Patent: January 14, 2014
    Assignee: Seagate Technology LLC
    Inventors: Shuaigang Xiao, Thomas Young Chang, Yingguo Peng, David Kuo, Kaizhong Gao, Thomas Patrick Nolan, Ganping Ju
  • Patent number: 8605555
    Abstract: An energy assisted magnetic recording (EAMR) system includes a magnetic recording medium including a plurality of bi-layers and a magnetic recording layer on the plurality of bi-layers, a magnetic transducer configured to write information to the magnetic recording medium, and a light source positioned proximate the magnetic transducer and configured to heat the magnetic recording medium. Each of the plurality of bi-layers includes a heatsink layer and an amorphous under-layer on the heatsink layer.
    Type: Grant
    Filed: April 19, 2012
    Date of Patent: December 10, 2013
    Assignee: WD Media, LLC
    Inventors: Alexander S. Chernyshov, Hua Yuan, Bogdan Valcu, Antony Ajan, B. Ramamurthy Acharya
  • Patent number: 8570844
    Abstract: A magnetic recording media is disclosed. The media comprises a substrate, a recording layer disposed over the substrate, and a metallic layer disposed between the recording layer and the substrate. The recording layer is configured to receive an electromagnetic radiation, absorb a first portion of the electromagnetic radiation, and transmit a second portion of the electromagnetic radiation. The metallic layer comprises a non-magnetic metal and configured to reflect at least some of the second portion of the electromagnetic radiation towards the recording layer.
    Type: Grant
    Filed: February 1, 2011
    Date of Patent: October 29, 2013
    Assignee: Western Digital (Fremont), LLC
    Inventors: HongXing Yuan, Shing Lee, Zhong Shi, Jinshan Li
  • Patent number: 8565050
    Abstract: Systems and methods for providing media having a moment keeper layer for heat assisted magnetic recording (HAMR). One such method for writing information to a magnetic media having a moment keeper layer using heat assisted magnetic recording includes heating a portion of the media to a preselected temperature, where the media includes a magnetic recording layer adjacent to the keeper layer, where a Curie temperature of the keeper layer is greater than a Curie temperature of the recording layer, and where the preselected temperature is about equal to, or greater than, the Curie temperature of the recording layer, allowing the portion of the media to cool, and writing information to the media during the cooling.
    Type: Grant
    Filed: December 20, 2011
    Date of Patent: October 22, 2013
    Assignee: WD Media, LLC
    Inventors: Gerardo A. Bertero, David Treves
  • Patent number: 8430755
    Abstract: In embodiments of the present invention improved capabilities are described for serving a computer game, comprising: (a) providing two separate storage facilities accessible from a server, the first storage facility comprising fast response searchable memory for storage of recently produced game play data, and the second storage facility comprising a structured database for longer term storage of game play data, the first memory having a data search and data retrieval speed that is substantially faster than the second memory; (b) receiving, at the server, a game play request from a live gaming participant with a desired opponent attribute; (c) in response to the game play request, searching the first memory, based on the attribute, to identify prior game play data corresponding to an appropriate opponent; and (d) presenting a multi-player game environment where the live gaming participant can play against and have two-way interactions with an apparently live opponent.
    Type: Grant
    Filed: January 24, 2011
    Date of Patent: April 30, 2013
    Assignee: Tetris Online, Inc.
    Inventors: Eui-Joon Youm, Chang-ha Lim
  • Patent number: 8397998
    Abstract: A data storage device for use as a portable card, magnetically encodeable card, magnetic credit card or the like is shown. The data storage device includes a substrate having at least one surface. A high density, magnetically coercive material layer is disposed on or is deposited on the substrate for storing magnetic signals. The magnetically coercive material may have an axis of magnetization that is oriented in a predetermined direction relative to the at least one surface of the substrate. A layer of non-magnetically material is disposed on the substrate for defining an exchange break layer.
    Type: Grant
    Filed: October 20, 2000
    Date of Patent: March 19, 2013
    Assignee: UltraCard, Inc.
    Inventors: Donald C. Mann, Bert C. Cook, Jr.
  • Patent number: 8338007
    Abstract: A magnetic recording medium a magnetic recording medium includes a soft magnetic layer formed on a substrate, magnetic patterns made of a protruded ferromagnetic layer separated from each other on the soft magnetic layer, and a nonmagnetic layer formed between the magnetic patterns, a nitrogen concentration therein being higher on a surface side than on a substrate side.
    Type: Grant
    Filed: September 26, 2008
    Date of Patent: December 25, 2012
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Kaori Kimura, Yoshiyuki Kamata, Satoshi Shirotori, Tsuyoshi Onitsuka
  • Publication number: 20120307403
    Abstract: According to one embodiment, a magnetic recording medium includes: a data area on which a plurality of first magnetic dots are arranged at predetermined positions to record information; a servo area on which a plurality of second magnetic dots for specifying the positions of said plurality of first magnetic dots are arranged at predetermined positions; and servo frames configured so that a frequency of said servo frames is 2 N per circumference of said medium having a radius, that said servo frames are radially discontinuous, and that said servo frame and a space-area, on which no servo frames exist, are alternately radially arranged at a cycle W.
    Type: Application
    Filed: February 13, 2012
    Publication date: December 6, 2012
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Kazuto KASHIWAGI, Makoto Asakura, Haruhiko Izumi, Masatoshi Sakurai
  • Patent number: 8320232
    Abstract: A patterned perpendicular magnetic recording medium has discrete data islands that have first and second ferromagnetic layers (MAG1 and MAG2) with first and second nonmagnetic interlayers (IL1 and IL2) between MAG1 and MAG2. MAG1 and MAG2 may be similar CoPtCr alloys with similar thicknesses, with thicknesses of IL1 and IL2 that assure that MAG1 and MAG2 are strongly exchange coupled. Alternatively, MAG2 may be a “write assist” layer, for example a high-saturation magnetization, magnetically soft material in an exchange-spring structure, with IL1 being very thin so that IL2 functions as the coupling layer between MAG1 and the write-assist MAG2 layer. In an application for thermally-assisted recording (TAR), MAG2 may be the chemically-ordered equiatomic binary alloy FePt or CoPt based on the L10 phase, with high magneto-crystalline anisotropy (Ku).
    Type: Grant
    Filed: July 21, 2011
    Date of Patent: November 27, 2012
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Ernesto E. Marinero, Dieter K. Weller, Brian R. York
  • Patent number: 8284520
    Abstract: A magnetic recording medium comprising a magnetic layer having a magnetic recording pattern comprising elevations constituting magnetic recording regions and depressions constituting boundary regions for partitioning the magnetic recording regions, and a continuous protective carbon overcoat on the magnetic layer, characterized in that portions of the carbon overcoat located on the magnetic recording regions-constituting elevations of the magnetic layer are thicker than portions of the carbon overcoat located on the boundary regions-constituting depressions of the magnetic layer. The protective carbon overcoat is formed by a CVD method. The boundary regions-constituting depressions are preferably subjected to exposure to plasma, and have modified magnetic characteristics. The magnetic recording regions exhibit high corrosion resistance and the magnetic recording medium has enhanced environmental resistance.
    Type: Grant
    Filed: March 3, 2009
    Date of Patent: October 9, 2012
    Assignee: Showa Denko K.K.
    Inventor: Masato Fukushima
  • Patent number: 8241766
    Abstract: An apparatus includes a plurality of bilayer structures positioned adjacent to each other, each of the bilayer structures including a first layer of magnetic material having a first Curie temperature and a second layer of magnetic material positioned adjacent to the first layer, wherein the second layer has a second Curie temperature that is lower than the first Curie temperature, and magnetic grains of the first layer are unstable when the second layer of magnetic material is heated above the second Curie temperature. The recording temperature is reduced due to the smaller switching volume achieved by using vertically decoupled laminations at elevated temperatures.
    Type: Grant
    Filed: August 8, 2007
    Date of Patent: August 14, 2012
    Assignee: Seagate Technology LLC
    Inventors: Bin Lu, Ganping Ju
  • Patent number: 8202168
    Abstract: Systems and methods manage memory in a wagering game machine. The systems and methods determine one or more quantities of various types of memory that are required by a wagering game application. The systems and methods determine if the wagering game machine has enough available memory to perform a requested operation such as downloading the wagering game, activating a component of the wagering game, or installing content for the wagering game.
    Type: Grant
    Filed: June 28, 2007
    Date of Patent: June 19, 2012
    Assignee: WMS Gaming Inc.
    Inventors: Srinivyasa M. Adiraju, Peter R. Anderson, Ryan S. Mak, Jim Motyl
  • Patent number: 8180987
    Abstract: Control of the encryption of data for storage with respect to removable data storage cartridges having a recording media and having cartridge memory with at least a portion lockable to read-only, employs the steps of inspecting the read-only portion of the cartridge memory of the removable data storage cartridge for an “Encrypt-Only” flag. If the “Encrypt-Only” flag is present, writes to the recording media of the removable data storage cartridge are limited to data in an encrypted format, if any; and, else, writes to the recording media of the removable data storage cartridge are allowed for data in any of encrypted and unencrypted formats.
    Type: Grant
    Filed: February 16, 2009
    Date of Patent: May 15, 2012
    Assignee: International Business Machines Corporation
    Inventors: Diana Joyce Hellman, Glen Alan Jaquette, Leonard George Jesionowski
  • Patent number: 8168310
    Abstract: A magnetic storage medium according to one embodiment includes a substrate; a first oxide magnetic layer formed above the substrate; a second oxide magnetic layer formed above the first oxide magnetic layer; an exchange coupling layer formed above the second oxide magnetic layer, the exchange coupling layer comprising an oxide; and a magnetic cap layer formed above the exchange coupling layer. A method according to one embodiment includes forming a high Ku first oxide magnetic layer above a substrate by sputtering; forming a low Ku second oxide magnetic layer above the first oxide magnetic layer by sputtering; forming an exchange coupling layer of CoCrPt-oxide above the second oxide magnetic layer; and forming a magnetic cap layer above the exchange coupling layer. Additional systems and methods are also presented.
    Type: Grant
    Filed: December 15, 2009
    Date of Patent: May 1, 2012
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Xiaoping Bian, Jack Jyh-Kau Chang, Qing Dai, Hoa V. Do, Yoshihiro Ikeda, Kentaro Takano, Chu S. Tran
  • Patent number: 8158215
    Abstract: A method of manufacturing magnetic recording media with a high areal recording density, in which there write bleeding during magnetic recording is eliminated by reducing insofar as possible the coercive force and remanent magnetization in areas between magnetic tracks, is provided. The method of manufacture can produce magnetic recording media 10, in which a magnetic layer 3 is provided on at least one surface of a nonmagnetic substrate 1, and a magnetically separated magnetic pattern 3a is formed in this magnetic layer 3; by implanting atoms into the magnetic layer 3 with a uniform distribution in the thickness direction of the magnetic layer 3, and partially rendering nonmagnetic the magnetic layer 3, nonmagnetic portions 5 which magnetically separate the magnetic pattern 3a are formed.
    Type: Grant
    Filed: August 16, 2007
    Date of Patent: April 17, 2012
    Assignee: Showa Denko K.K.
    Inventors: Masato Fukushima, Akira Sakawaki
  • Publication number: 20120069473
    Abstract: Magnetic media made using planar magnetic heads. A head may comprise a substrate having conductive thru-hole vias extending therethrough, a first magnetic layer deposited and patterned on the substrate, a first insulation layer deposited and patterned on the first magnetic layer, a conductive coil layer deposited and patterned on the first insulation layer and connected to the conductive thru-hole vias, a second insulation layer deposited and patterned on the conductive coil layer, vias patterned into the insulation layer extending to the first magnetic layer, a second magnetic layer deposited in the vias, and a third magnetic layer deposited and patterned on the second insulation layer and second magnetic layer. The third magnetic layer may be connected to the first magnetic layer through the second magnetic layer deposited in the vias of the insulation layers.
    Type: Application
    Filed: November 29, 2011
    Publication date: March 22, 2012
    Inventor: Matthew P. Dugas
  • Patent number: 8124254
    Abstract: A heterostructure of multiferroics or magnetoelectrics (ME) was disclosed. The film has both ferromagnetic and ferroelectric properties, as well as magneto-optic (MO) and electro-optic (EO) properties. Oxide buffer layers were employed to allow grown a cracking-free heterostructure a solution coating method.
    Type: Grant
    Filed: December 18, 2007
    Date of Patent: February 28, 2012
    Assignee: Boston Applied Technologies, Inc
    Inventors: Yingyin Kevin Zou, Hua Jiang, Kewen Kevin Li, Xiaomei Guo
  • Patent number: 8116035
    Abstract: The invention provides a magnetic recording medium, and a magnetic recording and reproducing apparatus. The magnetic recording medium includes a substrate 11, an under layer 12 formed on the substrate 11, a magnetic recording layer 13 formed on the under layer 12, and a protective layer 14 formed on the magnetic recording layer 13. The magnetic recording layer 13 is composed of a primary recording layer 14 and a secondary recording layer 15 which are mutually exchange-coupled. The primary recording layer 14 has magnetic grains and a nonmagnetic material that surrounds the magnetic grains, and has a perpendicular magnetic anisotropy. The secondary recording layer 15 is made of a material having a negative crystal magnetic anisotropy and its easy plane of the magnetization is a plane of the medium.
    Type: Grant
    Filed: June 9, 2006
    Date of Patent: February 14, 2012
    Assignees: Tohoku University, Showa Denko K.K., Kabushiki Kaisha Toshiba
    Inventors: Migaku Takahashi, Masahiro Oka, Akira Kikitsu
  • Patent number: 8084149
    Abstract: Embodiments of the invention provide a thermally assisted magnetic recording medium, which can overcome resistance against thermal fluctuation at RT and write capability, obtain a drastic temperature variation in coercive force at right below the recording temperature, and be formed at low temperature. In one embodiment, the medium has a layered structure formed of a lower high-KF ferromagnetic (F) layer formed on a substrate, satisfying TW<TC, an intermediate low-KAF antiferromagnetic (AF) layer satisfying TB<TW, and an upper ferromagnetic (F) layer for recording and reproducing, satisfying TW<TC, where TW is a recording temperature, TC is a Curie point, TN is a Neel point, TB is a blocking temperature, KF is a ferromagnetic magnetocrystalline anisotropy constant, and KAF is an antiferromagnetic magnetocrystalline anisotropy constant.
    Type: Grant
    Filed: July 25, 2006
    Date of Patent: December 27, 2011
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventor: Susumu Soeya
  • Patent number: 8081542
    Abstract: A thermally-assisted recording (TAR) patterned-media magnetic recording disk drive has a perpendicular patterned-media disk with multilevel data islands and a laser capable of supplying multiple levels of output power to a near-field transducer (NFT). If there are only two cells in each island, each island is formed of an upper cell of magnetic material with a coercivity HC1 and a Curie temperature TC1, a lower cell of magnetic material with a coercivity HC2 and a Curie temperature TC2 greater than TC1, and a nonmagnetic spacer layer between the two cells. Each cell is formed of high-anisotropy material so as to have an anisotropy field greater than the magnetic write field. The TAR laser is capable of supplying at least two levels of output power to the NFT to allow the islands to be heated to two distinct temperatures so that the two cells in an island can be written so as to have either the same or opposite magnetizations.
    Type: Grant
    Filed: November 9, 2010
    Date of Patent: December 20, 2011
    Assignee: Hitachi Global Technologies Netherlands B.V.
    Inventors: Michael Konrad Grobis, Barry Cushing Stipe, Dieter K. Weller, Gabriel Zeltzer
  • Patent number: 8036070
    Abstract: A magnetic recording device comprising at least one unstructured recording support exhibiting at least one elementary magnetic layer, the recording support having a magnetization perpendicular to the plane of the support characterized in that it comprises magnetic elements having a magnetization perpendicular to the plane of the support and a greater inversion field than the inversion field of the recording support, and which are separated from the recording support by a decoupling layer made of a nonmagnetic material so that the magnetic elements produce a dipolar field in the recording support. The magnetic elements are spaced apart from one another by nonmagnetic regions, each magnetic element defining during a write operation a memory point in the recording support.
    Type: Grant
    Filed: November 10, 2008
    Date of Patent: October 11, 2011
    Assignee: Centre National de la Recherche Scientifique
    Inventors: Gilles Louis Gaudin, Pierre-Jean Zermatten, Ioan Mihai Miron, Alain Schuhl