Disk Patents (Class 360/135)
  • Patent number: 10774404
    Abstract: Provided is a plurality of flaky magnetic metal particles of the embodiments, each flaky magnetic metal particle having a flat surface provided with either or both of a plurality of concavities and a plurality of convexities arranged in a first direction, each concavity or convexity having a width of 0.1 ?m or more, a length of 1 ?m or more, and an aspect ratio of 2 or higher; and at least one first element selected from the group consisting of iron (Fe), cobalt (Co), and nickel (Ni), the flaky magnetic metal particles having an average thickness of between 10 nm and 100 ?m inclusive and an average aspect ratio of between 5 and 10,000 inclusive.
    Type: Grant
    Filed: September 1, 2017
    Date of Patent: September 15, 2020
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Tomohiro Suetsuna, Hiroaki Kinouchi, Takahiro Kawamoto
  • Patent number: 10766844
    Abstract: Compounds [compounds (L)] comprising at least one monocyclic, polycyclic or polycondensed aromatic moiety [moiety (A*)], wherein: at least one carbon atom of moiety (A*) is substituted with a fluoropolyoxyalkene chain [chain (Rf)], said chain (Rf) comprising: a) a fluorocarbon segment having ether linkages in the main chain and b) at least one hydroxyl group and wherein: at least one other carbon atom of moiety (A*) is substituted with an electron-withdrawing group and mixtures thereof are herein disclosed. Disclosed are also a process for manufacturing compounds (L), a method for lubricating MRM comprising using compounds (L), a lubricant composition comprising one or more compounds (L) and a method for manufacturing a composition (C).
    Type: Grant
    Filed: May 14, 2015
    Date of Patent: September 8, 2020
    Assignee: SOLVAY SPECIALTY POLYMERS ITALY S.P.A.
    Inventors: Roberto Valsecchi, Pier Antonio Guarda, Rosaldo Picozzi
  • Patent number: 10755738
    Abstract: The present invention provides: an aluminum alloy substrate for magnetic discs with excellent plating surface smoothness; a manufacturing method therefor; and a magnetic disc using said aluminum alloy substrate for magnetic discs. The present invention is an aluminum alloy substrate for magnetic discs, a manufacturing method therefor, and a magnetic disc using said aluminum alloy substrate for magnetic discs, the aluminum alloy substrate being characterized in being obtained from an aluminum alloy containing Mg: 2.0-8.0 mass % (“%” below), Be: 0.00001-0.00200%, Cu: 0.003-0.150%, Zn: 0.05-0.60%, Cr: 0.010-0.300%, Si: 0.060% or less, Fe: 0.060% or less, the balance being obtained from Al and unavoidable impurities.
    Type: Grant
    Filed: May 23, 2016
    Date of Patent: August 25, 2020
    Assignees: UACJ Corporation, Furukawa Electric Co., Ltd.
    Inventors: Kotaro Kitawaki, Takuya Murata, Akira Hibino, Naoki Kitamura, Masanobu Onishi, Hideki Takahashi, Satoshi Yamazaki, Sadayuki Toda
  • Patent number: 10748569
    Abstract: According to one embodiment, a magnetic disk device includes a disk including two first servo sectors arranged side by side in a circumferential direction and a second servo sector located between the two first servo sectors, a head that writes data to the disk and reads data from the disk, and a controller that adjusts a second timing at which the second servo sector is demodulated based on a first timing at which the first servo sector is demodulated, and corrects a first initial phase of a first demodulation signal obtained by demodulating the second servo sector at the second timing, based on a first amplitude of the first demodulation signal.
    Type: Grant
    Filed: September 4, 2019
    Date of Patent: August 18, 2020
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
    Inventors: Takuya Ogawa, Fumiya Kudo, Naoki Tagami
  • Patent number: 10737965
    Abstract: A technical object of the present invention is to devise a glass sheet that is suitable for supporting a substrate to be processed to be subjected to high-density wiring and has high end surface strength, and a method of manufacturing the glass sheet, to thereby contribute to an increase in density of a semiconductor package. The glass sheet of the present invention has a total thickness variation of less than 2.0 ?m, all or part of an end surface of the glass sheet including a melt-solidified surface.
    Type: Grant
    Filed: July 5, 2017
    Date of Patent: August 11, 2020
    Assignee: NIPPON ELECTRIC GLASS CO., LTD.
    Inventors: Hiroki Katayama, Hiroshi Nakajima
  • Patent number: 10734022
    Abstract: According to one embodiment, a magnetic disk device includes a disk, a first head, a second head, an actuator configured to position the first head and the second head over the disk, and a controller configured to control the actuator based on a first value having a first waveform suppressing a disturbance component, wherein the controller is configured to invert, in the first waveform, a polarity of a third waveform succeeding a first timing with respect to a polarity of a second waveform preceding the first timing in a case where the first head is changed to the second head at the first timing.
    Type: Grant
    Filed: August 15, 2019
    Date of Patent: August 4, 2020
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
    Inventor: Daisuke Sudo
  • Patent number: 10725854
    Abstract: A disk device includes a disk medium, a magnetic recording head, a processor configured to control the magnetic recording head to write data to and read data from a plurality of tracks of the disk medium on a sector-by-sector basis, and a check value generation circuit configured to generate, for each of the plurality of tracks, check value data based on data stored in one or more sectors of the track. The processor controls the magnetic recording head to write check value data for a first track of the plurality of tracks in a first sector on the disk medium and check value data for a second track of the plurality of tracks in a second sector on the disk medium that is adjacent to the first sector.
    Type: Grant
    Filed: September 3, 2018
    Date of Patent: July 28, 2020
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATION
    Inventor: Norikatsu Toukairin
  • Patent number: 10690697
    Abstract: An apparatus and method for topographically characterizing a workpiece. The method includes scanning a first surface of a workpiece with a scanning probe at a first resolution to derive a first topographical image, and performing a refining operation on the first topographical image to obtain a true first topographical image. The method also includes scanning, with the scanning probe, a surface of interest of the workpiece, which is a sub-portion of the first surface, at a second resolution that is higher than the first resolution to derive a second topographical image. The second topographical image is scaled down to the first resolution. The method further includes performing a pattern recognition operation to substantially match the scaled-down second topographical image to a corresponding sub-portion of the true first topographical image. The matched sub-portion of the true first topographical image is employed to refine the second topographical image.
    Type: Grant
    Filed: October 26, 2018
    Date of Patent: June 23, 2020
    Assignee: SEAGATE TECHNOLOGY LLC
    Inventors: Zhiyong Xiao, Gary Kunkel, Dan Dinh
  • Patent number: 10580448
    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: May 30, 2017
    Date of Patent: March 3, 2020
    Assignee: HOYA CORPORATION
    Inventor: Masaaki Ueda
  • Patent number: 10566032
    Abstract: Described are devices and assemblies (e.g., precursors to a devices) that include a friction stir weld or a joint useful for forming a friction stir weld, the devices containing two metal components that form the joint at which the friction stir weld can be produced, as well as methods for producing a devices, assembly, joints, or friction stir weld as described.
    Type: Grant
    Filed: September 8, 2017
    Date of Patent: February 18, 2020
    Assignee: SEAGATE TECHNOLOGY LLC
    Inventors: Jerome Thomas Coffey, Samuel Edward Severson, Jeffrey L. Bruce, Emily Ann Chesnut
  • Patent number: 10553435
    Abstract: The invention relates in particular to a method for producing subsequent patterns in an underlying layer (120), the method comprising at least one step of producing prior patterns in a carbon imprintable layer (110) on top of the underlying layer (120), the production of the prior patterns involving nanoimprinting of the imprintable layer (110) and leave in place a continuous layer formed by the imprintable layer (110) and covering the underlying layer (120), characterized in that it comprises the following step: at least one step of modifying the underlying layer (120) via ion implantation (421) in the underlying layer (120), the implantation (421) being carried out through the imprintable layer (110) comprising the subsequent patterns, the parameters of the implantation (421) being chosen in such a way as to form, in the underlying layer (120), implanted zones (122) and non-implanted zones, the non-implanted zones defining the subsequent patterns and having a geometry that is dependent on the prior patterns
    Type: Grant
    Filed: December 22, 2015
    Date of Patent: February 4, 2020
    Assignee: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
    Inventors: Stefan Landis, Nicolas Posseme, Lamia Nouri
  • Patent number: 10546605
    Abstract: The magnetic tape device includes a magnetic tape and a TMR head (servo head), in which the magnetic tape includes a non-magnetic support, and a magnetic layer including ferromagnetic powder and a binding agent on the non-magnetic support, the ferromagnetic powder is ferromagnetic hexagonal ferrite powder, an intensity ratio of a peak intensity Int(110) of a diffraction peak of a (110) plane with respect to a peak intensity Int(114) of a diffraction peak of a (114) plane of a hexagonal ferrite crystal structure obtained by an X-ray diffraction analysis of the magnetic layer by using an In-Plane method is 0.5 to 4.0, and a vertical direction squareness ratio of the magnetic tape is 0.65 to 1.00.
    Type: Grant
    Filed: March 14, 2018
    Date of Patent: January 28, 2020
    Assignee: FUJIFILM Corporation
    Inventors: Eiki Ozawa, Norihito Kasada
  • Patent number: 10529376
    Abstract: In a two-dimensional magnetic recording (TDMR) system, a first finite impulse response (FIR) filter processes data read from a track of a magnetic medium by a first head using first filter tap values determined a priori independently of a second head. A second FIR filter processes data read from a track by the second head using second filter tap values determined a priori independently of the first head. An off-track detector detects whether one or more of the first and second heads is off of the tracks being read. A gain controller controls gains for the first and second FIR filters based on whether one or more of the first and second heads is off of the tracks being read.
    Type: Grant
    Filed: November 6, 2018
    Date of Patent: January 7, 2020
    Assignee: MARVEL INTERNATIONAL LTD.
    Inventor: Mats Oberg
  • Patent number: 10453486
    Abstract: According to one embodiment, a magnetic disk device includes a disk, a first head, a second head, an actuator configured to position the first head and the second head over the disk, and a controller configured to control the actuator based on a first value having a first waveform suppressing a disturbance component, wherein the controller is configured to invert, in the first waveform, a polarity of a third waveform succeeding a first timing with respect to a polarity of a second waveform preceding the first timing in a case where the first head is changed to the second head at the first timing.
    Type: Grant
    Filed: August 13, 2018
    Date of Patent: October 22, 2019
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
    Inventor: Daisuke Sudo
  • Patent number: 10424687
    Abstract: A photovoltaic device includes an intrinsic layer having two or more sublayers. The sublayers are intentionally deposited to include complementary concave and convex shapes. The sum of these layers resulting in a relatively flat surface for deposition of n- or p-doped layers. The photovoltaic device is optionally bifacial.
    Type: Grant
    Filed: September 16, 2016
    Date of Patent: September 24, 2019
    Assignee: Aptos Energy, LLC
    Inventors: Thanh Ngoc Pham, Joe Feng
  • Patent number: 10409508
    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: June 20, 2017
    Date of Patent: September 10, 2019
    Assignee: Hewlett Packard Enterprise Development LP
    Inventors: Senthil Kumar Ramamoorthy, Pradeep Shetty, Mukul Kumar Singh, Hy Vu
  • 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: 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: 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