Patents Examined by Craig A. Renner
  • Patent number: 11514938
    Abstract: A data storage device is disclosed comprising at least one head configured to access a magnetic tape. The head is positioned at an idle location along a length of the magnetic tape when entering an idle mode, wherein the idle location reduces a wake latency associated with accessing the magnetic tape when exiting the idle mode.
    Type: Grant
    Filed: February 18, 2021
    Date of Patent: November 29, 2022
    Assignee: Western Digital Technologies, Inc.
    Inventor: James N. Malina
  • Patent number: 11514935
    Abstract: Aspects of the present disclosure generally relate to magnetic recording heads of magnetic recording devices. A read head includes a first reader, an insulating separation layer, and a second reader disposed above the insulating separation layer. The second reader includes a magnetic seed layer and a cap layer. The second reader includes a first upper free layer disposed between the magnetic seed layer and the cap layer, and a second upper free layer disposed between the first upper free layer and the cap layer. The second reader includes a barrier layer. In one implementation the second reader includes an antiferromagnetic (AFM) layer disposed between the magnetic seed layer and the insulating separation layer to pin the magnetic seed layer.
    Type: Grant
    Filed: October 13, 2021
    Date of Patent: November 29, 2022
    Assignee: Western Digital Technologies, Inc.
    Inventors: Xiaoyong Liu, Ji Li, Goncalo Marcos Baião De Albuquerque, Daniele Mauri, Yukimasa Okada
  • Patent number: 11514937
    Abstract: According to one embodiment, when adjusting a position of a magnetic head by a microactuator, in a case where a difference of an absolute value of a first voltage value obtained by correcting a voltage value applied to the microactuator based on hysteresis and an absolute value of a second voltage value obtained by not correcting the voltage value applied to the microactuator based on the hysteresis is positive, a control unit applies a third voltage value obtained based on the second voltage value to the microactuator, and adjusts shortage of the adjustment executed by the microactuator by controlling at least one of a voice coil motor and/or a microactuator other than a microactuator applying a third voltage value.
    Type: Grant
    Filed: January 20, 2022
    Date of Patent: November 29, 2022
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATION
    Inventor: Takuji Matsuzawa
  • Patent number: 11514932
    Abstract: The present disclosure generally relates to magnetic storage devices, such as magnetic tape drives, comprising a read head. The read head comprises a plurality of read sensors disposed between a lower shield having a first width in a stripe height direction and an upper shield. The plurality of read sensors comprise an antiferromagnetic layer and a free layer comprising a first layer and a second layer. A plurality of soft bias side shields disposed adjacent to and outwardly of the plurality of read sensors in a cross-track direction, each of the plurality of soft bias side shields having a second width in the stripe height direction less than the first width. Each of the plurality of soft bias side shields are spaced a first distance from the lower shield and a second distance from the upper shield, the first distance being substantially equal to the second distance.
    Type: Grant
    Filed: June 25, 2021
    Date of Patent: November 29, 2022
    Assignee: Western Digital Technologies, Inc.
    Inventors: Quang Le, Hongquan Jiang, Hisashi Takano, Cherngye Hwang, Xiaoyong Liu
  • Patent number: 11514934
    Abstract: The present disclosure generally relates to a dual free layer (DFL) two dimensional magnetic recording (TDMR) read head. The read head comprises a first sensor, a first rear hard bias (RHB) structure disposed adjacent to the first sensor, an upper shield disposed over the first sensor and first RHB structure, a lower shield disposed over the upper shield, a second sensor disposed over the lower shield, and a second RHB structure disposed adjacent to the second sensor. A first surface of the first sensor is substantially flush or aligned with a first surface of the first RHB structure. A first surface of the second sensor is substantially flush or aligned with a first surface of the second RHB structure. The upper shield extends linearly from a media facing surface into the read head. The first lower shield is over-milled a greater amount of time than the second lower shield.
    Type: Grant
    Filed: October 27, 2021
    Date of Patent: November 29, 2022
    Assignee: Western Digital Technologies, Inc.
    Inventors: Ming Mao, Chen-Jung Chien, Daniele Mauri, Goncalo Marcos Baião De Albuquerque, Chih-Ching Hu, Anup Ghosh Roy, Yung-Hung Wang
  • Patent number: 11514931
    Abstract: A magnetic head includes a main pole, a trailing shield, and a spin torque oscillator. A top surface of the main pole includes a first inclined portion, a second inclined portion, and a third inclined portion arranged in order of closeness to a medium facing surface. Each of the first to third inclined portions has a front end closest to the medium facing surface and a rear end farthest from the medium facing surface. Each of the first to third inclined portions is inclined relative to the medium facing surface and a direction orthogonal to the medium facing surface so that its rear end is located forward relative to its front end in a direction of travel of a recording medium.
    Type: Grant
    Filed: February 22, 2022
    Date of Patent: November 29, 2022
    Assignee: HEADWAY TECHNOLOGIES, INC.
    Inventors: Hironori Araki, Yoshitaka Sasaki, Tetsuhito Shinohara, Shigeki Tanemura, Kazuki Sato, Yoji Nomura, Yukinori Ikegawa, Tetsuya Roppongi
  • Patent number: 11514936
    Abstract: The present disclosure relates to read head apparatus, and methods of forming read head apparatus, for magnetic storage devices, such as magnetic tape drives (e.g., tape drives). In one implementation, a read head for magnetic storage devices includes a lower shield, an upper shield, one or more lower leads, and a plurality of upper leads. The read head includes a plurality of read sensors, each read sensor of the plurality of read sensors including a first antiferromagnetic (AFM) layer. The read head includes a plurality of soft bias side shields disposed between and outwardly of the plurality of read sensors. The read head includes a plurality of second AFM layers disposed below the plurality of soft bias side shields along a downtrack direction.
    Type: Grant
    Filed: June 25, 2021
    Date of Patent: November 29, 2022
    Assignee: Western Digital Technologies, Inc.
    Inventors: Quang Le, Hongquan Jiang, Cherngye Hwang, Hisashi Takano
  • Patent number: 11508414
    Abstract: A cooling system for cooling a set of components in a compute module and an array of storage devices in a storage module, the array of storage devices comprising rows and columns. The storage module is wider than the compute module to accommodate a larger backplane. The backplane has large vertical vent openings for accommodating connectors of storage devices connecting to the backplane. Pairs of divider walls positioned between adjacent columns of storage devices form large channels for increased airflow between columns of storage devices and reduced airflow between adjacent rows of storage devices. The design allows for increased cooling performance and reduced acoustic energy (noise).
    Type: Grant
    Filed: April 2, 2021
    Date of Patent: November 22, 2022
    Assignee: Dell Products L.P.
    Inventors: Jean Marie Doglio, Chris E. Peterson, Harold John Syring, Paul Allen Waters, Evangelos Koutsavdis, Russell C. Smith
  • Patent number: 11495247
    Abstract: An information processing device includes a recording unit that records a plurality of objects including data and metadata related to the data on a magnetic recording medium, and executes, after recording at least one of the objects, processing of recording first set data which is a set of the metadata included in the object. The first set data is the set of the metadata included in the object recorded after recording the first set data that is recorded immediately before. The magnetic recording medium has a magnetic layer containing a ferromagnetic powder and a binding agent on a non-magnetic support. A difference between spacings S0.5 and S13.5 measured under pressures of 0.5 atm and 13.5 atm by an optical interference method after n-hexane cleaning on a surface of the magnetic layer is equal to or less than 3.0 nm.
    Type: Grant
    Filed: August 4, 2021
    Date of Patent: November 8, 2022
    Assignee: FUJIFILM CORPORATION
    Inventors: Eiki Ozawa, Michitaka Kondo, Kentaro Miyamoto, Naoki Sano
  • Patent number: 11495253
    Abstract: A data storage system may utilize a gimbal test system to find open circuits and short circuits in a head gimbal assembly. The gimbal test system can have a gimbal flexure suspended between a load beam and a data storage medium with a flex circuit physically attached to the gimbal flexure to electrically connect a transducing head to a controller. The flex circuit can be tested with a test via that continuously extends through the flex circuit to a probe portion and a test pad located on an air bearing side of the gimbal flexure. The probe portion can be backed by the gimbal flexure along a plane perpendicular to a recording surface of the data storage medium.
    Type: Grant
    Filed: November 16, 2018
    Date of Patent: November 8, 2022
    Assignee: Seagate Technology LLC
    Inventors: Ravishankar Ajjanagadde Shivarama, Bradley J. Ver Meer
  • Patent number: 11495270
    Abstract: The present disclosure generally relates to a tape embedded drive having a plurality of feedthrough connectors. The feedthrough connectors are symmetrically placed within the tape embedded drive such that regardless of whether an even or odd number of feedthrough connectors are present, the feedthrough connectors are symmetrical about a centerline of the tape embedded drive. In such a layout, the tape embedded drive is more stable due to symmetrical mass balance. Additionally, the tape embedded drive is more cost effective to produce.
    Type: Grant
    Filed: September 20, 2021
    Date of Patent: November 8, 2022
    Assignee: Western Digital Technologies, Inc.
    Inventors: Miki Namihisa, Kouki Uefune, Toshio Takahashi
  • Patent number: 11495251
    Abstract: A write shield of a magnetic head includes a pair of first side shields and a pair of second side shields. The pair of first side shields each include a first side wall and a second side wall. The pair of second side shields each include a third side wall. The third side wall of one of the pair of second side shields is continuous with the first side wall of one of the pair of first side shields. The third side wall of the other of the pair of second side shields is continuous with the first side wall of the other of the pair of first side shields.
    Type: Grant
    Filed: January 12, 2022
    Date of Patent: November 8, 2022
    Assignee: HEADWAY TECHNOLOGIES, INC.
    Inventors: Yukinori Ikegawa, Yoshitaka Sasaki, Kazuki Sato, Shigeki Tanemura
  • Patent number: 11488638
    Abstract: An apparatus is provided for the simultaneous transferring of multiple storage devices from a chassis to reduce service time and associated server temperature fluctuations. The storage transfer device may be mounted to a chassis with a multitude of electronic devices, e.g., a JBOD with HDDs, above the devices to be removed. The storage device may then be manipulated to mechanically unlatch the devices from the chassis and simultaneously attach the devices to the transfer device. The devices may then be disconnected and withdrawn from the chassis and pulled into the storage transfer device. The devices may be re-installed later using the storage device and the reverse process.
    Type: Grant
    Filed: February 22, 2021
    Date of Patent: November 1, 2022
    Assignee: ZT Group Int'l, Inc.
    Inventors: Paul Harold Anderson, Jared Harlan
  • Patent number: 11488624
    Abstract: An exemplary data storage device includes an actuator arm assembly, a top guide rail, a bottom guide rail, and a first ball bearing. The actuator arm assembly includes a first post defining a pivot axis that is inclined between about 5 degrees and about 25 degrees from a horizontal plane defined by a data storage disk surface. The top guide rail includes a first rolling surface that is parallel to the pivot axis. The bottom guide rail is spaced from the top guide rail and includes a second rolling surface that is parallel to the first rolling surface. The first ball bearing includes a first inner race and a first outer race, the first inner race surrounding the first post, and the first outer race in contact with the first rolling surface or the second rolling surface. An exemplary method of assembling a data storage device is also described.
    Type: Grant
    Filed: September 20, 2021
    Date of Patent: November 1, 2022
    Assignee: Seagate Technology LLC
    Inventors: Xiong Liu, YiChao Ma, Than Zaw Myint, YongJie Tang
  • Patent number: 11475924
    Abstract: A heat-assisted magnetic recording device is disposed in a hermetically sealed enclosure. The device includes a slider comprising a reader, a writer, and an optical waveguide configured to couple light from a light source to a near-field transducer situated at or near an air bearing surface of the slider. The near-field transducer comprises an enlarged portion and a peg extending from the enlarged portion in a direction of the air bearing surface. A fill gas is provided within the enclosure. The fill gas comprises a mixture of a low-density, inert gas and at least one gas that oxidizes carbon, where the total carbon oxidizing gas concentration of the fill gas is 3-50% by volume. In certain embodiments, the fill gas comprises a hydrogen concentration sufficient to retard oxidation of the peg when the peg is at an operating temperature associated with write operations.
    Type: Grant
    Filed: March 19, 2021
    Date of Patent: October 18, 2022
    Assignee: Seagate Technology LLC
    Inventors: Robert D. Turner, Yuhang Cheng, Peter W. Kanas, Martin Liam McGarry, Peter Kevin McGeehin, Kevin R. Heim, Edward Charles Gage, Shaikh Mubassar Ali, Huazhou Lou
  • Patent number: 11462244
    Abstract: A storage device configured to store data on a tape is provided. In one aspect, the storage device includes the tape, which is configured to store data, and a data head, which is configured to read and/or write data from and/or to the tape. The storage device further includes an actuator configured to move the tape in a length direction in a step-wise manner. The actuator can include a plurality of pulling electrodes, wherein each pulling electrode can be activated to exert a pulling force on the tape, and a plurality of clamping electrodes, wherein each clamping electrode can be activated to clamp the tape.
    Type: Grant
    Filed: December 20, 2021
    Date of Patent: October 4, 2022
    Assignee: IMEC vzw
    Inventors: Grim Keulemans, Veronique Rochus, Maarten Rosmeulen, Xavier Rottenberg
  • Patent number: 11462239
    Abstract: According to one embodiment, a magnetic head includes a shield, a magnetic pole, a first magnetic layer provided between the shield and the magnetic pole, a second magnetic layer provided between the first magnetic layer and the magnetic pole, a third magnetic layer provided between the second magnetic layer and the magnetic pole, a first nonmagnetic layer provided between the shield and the first magnetic layer, a second nonmagnetic layer provided between the first magnetic layer and the second magnetic layer, a third nonmagnetic layer provided between the second magnetic layer and the third magnetic layer, and a fourth nonmagnetic layer provided between the third magnetic layer and the magnetic pole. The first and third nonmagnetic layers include one of Cu, Ag, Au, Al, and Ti. The second and fourth nonmagnetic layers include one of Ta, Pt, Ir, W, Mo, Cr, Tb, Rh, Pd, and Ru.
    Type: Grant
    Filed: August 17, 2021
    Date of Patent: October 4, 2022
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATION
    Inventors: Tazumi Nagasawa, Naoyuki Narita, Hirofumi Suto, Masayuki Takagishi, Tomoyuki Maeda
  • Patent number: 11450343
    Abstract: According to one embodiment, a magnetic disk device includes a first disk having a first user data region and a first system area, a second disk having a second user data region and a second system area, a first head that writes data to the first disk, a second head that writes data to the second disk, a first actuator having the first head, a second actuator having the second head, a first controller that controls the first disk, the first head, and the first actuator, and a second controller that controls the second disk, the second head, and the second actuator, wherein the first controller records first information related to the first head and the first disk in the second system area.
    Type: Grant
    Filed: March 10, 2021
    Date of Patent: September 20, 2022
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATION
    Inventor: Masatsugu Nishida
  • Patent number: 11443775
    Abstract: An issue facing shared read/write player hard disc drives (HDDs) is when a head-media contact event occurs, any resulting plume of debris caused by the contact event not only affects the magnetic disc currently being read or written, but other magnetic discs within the HDD enclosure. The presently disclosed technology is directed as mitigating the potential consequences of such a head-media contact event. By providing one or more internal access doors within the HDD, a magnetic disc currently being read from or written to may be physically isolated from other magnetic discs within the HDD. As a result, in the event of a head-media contact event, any resulting plume of debris caused by the contact event only affects the magnetic disc currently being read or written. The remaining magnetic discs within the HDD are isolated from the plume of debris.
    Type: Grant
    Filed: April 20, 2021
    Date of Patent: September 13, 2022
    Assignee: SEAGATE TECHNOLOGY LLC
    Inventors: Brett R. Herdendorf, Riyan Alex Mendonsa, Krishnan Subramanian
  • Patent number: 11437061
    Abstract: The present disclosure relates to read head apparatus, and methods of forming read head apparatus, for magnetic storage devices, such as magnetic tape drives (e.g., tape drives). In one implementation, a read head for magnetic storage devices includes a lower shield, one or more upper shields, one or more lower leads, and a plurality of upper leads. The read head includes a plurality of read sensors, each read sensor of the plurality of read sensors including a first antiferromagnetic (AFM) layer. The read head includes a plurality of soft bias side shields disposed between and outwardly of the plurality of read sensors. The read head includes one or more second AFM layers disposed above the first AFM layer and the plurality of soft bias side shields along a downtrack direction.
    Type: Grant
    Filed: June 25, 2021
    Date of Patent: September 6, 2022
    Assignee: Western Digital Technologies, Inc.
    Inventors: Quang Le, Hongquan Jiang, Cherngye Hwang, Hisashi Takano