Patents Examined by Craig A. Renner
  • Patent number: 11605397
    Abstract: Aspects of the present disclosure provide various magnetic recording slider structures and fabrication methods that can reduce head overcoat (HOC) thickness without significantly reducing the lifetime and reliability of a slider by using a protective cap placed on preselected locations on the outermost surface or HOC of the slider. A slider includes a writer comprising an energy-assisted recording element. The writer is configured to store information on a magnetic medium using the energy-assisted recording element. The slider includes a head overcoat (HOC) layer providing an outermost media facing surface. The slider further includes a protective cap positioned on the HOC layer to at least partially cover the energy-assisted recording element, the protective cap including a preselected shape configured to protect the energy-assisted recording element.
    Type: Grant
    Filed: June 16, 2021
    Date of Patent: March 14, 2023
    Assignee: Western Digital Technologies, Inc.
    Inventors: John Pierre Herber, Mark David Alnas Alias, Aileen Ticzon Jara, Reimar Azupardo
  • Patent number: 11594261
    Abstract: A modular data storage tape library includes a modular frame having a form factor similar to other types of computing racks. The modular data storage tape library includes a hermetically sealed enclosure within the modular frame and a cooling portion within the modular frame. Data storage tapes, data storage drives and robotics for moving the data storage tapes are included within the hermetically sealed enclosure. A heat exchanger transfers heat from the hermetically sealed enclosure to the cooling portion outside of the sealed enclosure through a boundary of the hermetically sealed enclosure without introducing air from the data center into the hermetically sealed enclosure. Because air is neither introduced nor removed from the hermetically sealed enclosure, humidity fluctuations are minimal, if existent, and contaminants are prevented from entering the hermetically sealed enclosure, thus increasing the life spans of the data storage tapes included in the hermetically sealed enclosure.
    Type: Grant
    Filed: March 16, 2021
    Date of Patent: February 28, 2023
    Assignee: Amazon Technologies, Inc.
    Inventors: Rick Chun Kit Cheung, Luke Thomas Gregory, Priti Choudhary, Brandyn Giroux
  • Patent number: 11587582
    Abstract: A read head is disclosed wherein a Spin Hall Effect (SHE) layer is formed on a free layer (FL) in a sensor and between the FL and top shield (S2). Preferably, the sensor has a seed layer, an AP2 reference layer, antiferromagnetic coupling layer, AP1 reference layer, and a tunnel barrier sequentially formed on a bottom shield (S1). In a three terminal configuration, a first current flows between S1 and S2 such that the AP1 reference layer produces a first spin torque on the FL, and a second current flows across the SHE layer thereby generating a second spin torque on the FL that opposes the first spin torque. When the stripe heights of the FL and SHE layer are equal, a two terminal configuration is employed where a current flows between one side of the SHE layer to a center portion thereof and then to S1, or vice versa.
    Type: Grant
    Filed: December 16, 2021
    Date of Patent: February 21, 2023
    Assignee: Headway Technologies, Inc.
    Inventors: Wenyu Chen, Yan Wu
  • Patent number: 11568891
    Abstract: A STRAMR structure is disclosed. The STRAMR structure can include a spin torque oscillator (STO) device in a WG provided between the mail pole (MP) trailing side and a trailing shield. The STO device, includes: a flux guiding layer that has a negative spin polarization (nFGL) with a magnetization pointing substantially parallel to the WG field without the current bias and formed between a first spin polarization preserving layer (ppL1) and a second spin polarization preserving layer (ppL2); a positive spin polarization (pSP) layer that adjoins the TS bottom surface; a non-spin polarization preserving layer (pxL) contacting the MP trailing side; a first negative spin injection layer (nSIL1) between the ppL2 and a third spin polarization preserving layer (ppL3); and a second negative spin injection layer (nSIL2) between the ppL3 and the pxL, wherein the nFGL, nSIL1, and nSIL2 have a spin polarization that is negative.
    Type: Grant
    Filed: November 30, 2021
    Date of Patent: January 31, 2023
    Assignee: Headway Technologies, Inc.
    Inventors: Wenyu Chen, Shohei Kawasaki, Tetsuya Roppongi
  • Patent number: 11557315
    Abstract: The present disclosure generally relates to a magnetic media drive employing a magnetic recording head. The magnetic recording head comprises a main pole, an EAMR stack disposed on the main pole, and a trailing shield disposed on the EAMR stack. The EAMR stack comprises a seed layer disposed on the main pole, a spin torque layer disposed on the seed layer, and a spacer layer disposed on the spin torque layer. At least one surface of the spacer layer in contact with the spin torque layer has a smaller or reduced area than the spin torque layer. The at least one surface of the spacer layer in contact with the spin torque layer is recessed from a media facing surface and has a smaller cross-track width than the spin torque layer and a smaller width in the stripe height direction than the spin torque layer.
    Type: Grant
    Filed: December 14, 2021
    Date of Patent: January 17, 2023
    Assignee: Western Digital Technologies, Inc.
    Inventors: Suping Song, Zhanjie Li, Terence Lam, Changqing Shi, Lijie Guan
  • Patent number: 11557314
    Abstract: Embodiments of the present disclosure generally relate to magnetic recording systems, and more particularly to a magnetic recording system with a current-assisted write head. The write head comprises a main pole, a trailing shield disposed above the main pole, a trailing gap disposed between the main pole and the trailing shield, a side shield surrounding three sides of the main pole, the side shield being in contact with and disposed below the trailing shield and the trailing gap, and a side gap disposed between the side shield and each of the three sides of the main pole. The side gap comprises a non-magnetic electrically-conducting material to dissipate heat away from the main pole, lowering the resistance and temperature rise due to heating. The trailing gap may further comprise a non-magnetic electrically-conducting material. The write head may have a two terminal or three terminal connection configuration.
    Type: Grant
    Filed: June 26, 2019
    Date of Patent: January 17, 2023
    Assignee: Western Digital Technologies, Inc.
    Inventors: Muhammad Asif Bashir, Zhigang Bai, Yaguang Wei, Terence Lam, Youfeng Zheng, Changqing Shi, Michael Kuok San Ho, Xinjiang Shen, Suping Song, Lijie Guan, Venkatesh Chembrolu
  • Patent number: 11557317
    Abstract: The present disclosure generally relates to a read head of a data storage device. The read head includes a read sensor sandwiched between two shields. The shields can have different materials as well as a different number of layers. Furthermore the shields can be fabricated by different processes and have different heights and thicknesses. The ratio of the thickness to the height for the shields are substantially identical to ensure that the saturation field are substantially identical and balanced.
    Type: Grant
    Filed: September 20, 2021
    Date of Patent: January 17, 2023
    Assignee: Western Digital Technologies, Inc.
    Inventors: Xiaoyong Liu, Goncalo Baiao De Albuquerque, Daniele Mauri, Yukimasa Okada
  • Patent number: 11545175
    Abstract: A method of forming a spin transfer torque reversal assisted magnetic recording (STRAMR) writer is disclosed wherein a spin torque oscillator (STO) has a flux guiding layer (FGL) wherein magnetization flips to a direction substantially opposing the write gap (WG) field when sufficient current (IB) density is applied across the STO between a trailing shield and main pole (MP) thereby enhancing the MP write field. The FGL has a center portion with a larger magnetization saturation×thickness (MsT) than in FGL outer portions proximate to STO sidewalls. Accordingly, lower IB density is necessary to provide a given amount of FGL magnetization flipping and there is reduced write bubble fringing compared with writers having a FGL with uniform MsT. Lower MsT is achieved by partially oxidizing FGL outer portions. In some embodiments, there is a gradient in outer FGL portions where MsT increases with increasing distance from FGL sidewalls.
    Type: Grant
    Filed: March 10, 2022
    Date of Patent: January 3, 2023
    Assignee: Headway Technologies, Inc.
    Inventors: Ying Liu, Shohei Kawasaki, Wenyu Chen, Yuhui Tang
  • Patent number: 11538497
    Abstract: An information processing apparatus includes a memory, and a processor coupled to the memory and the processor configured to obtain requests for reading objects that exist in a plurality of wraps in different running directions on a tape of a tape storage, calculate an integrated speed for each of a plurality of orders of reading the objects based on a distance between the objects and a running speed of the tape between the objects, and select, from among the plurality of orders, an order that maximizes the integrated speed.
    Type: Grant
    Filed: August 30, 2021
    Date of Patent: December 27, 2022
    Assignee: FUJITSU LIMITED
    Inventor: Taketoshi Yoshida
  • Patent number: 11538504
    Abstract: A supporting device is assembled with an accommodating device of an electronic apparatus. The supporting device includes a casing and an engaging module. The engaging module is slidably disposed on the casing to engage with the accommodating device. The engaging module includes an engaging component, a pressing component and a fixing component. The engaging component includes an engaging portion and a sliding slot. The engaging portion is engaged with the accommodating device. The pressing component is disposed on the engaging component in a resiliently deformable manner. The fixing component pierces through the sliding slot to fix the engaging component on the casing.
    Type: Grant
    Filed: June 23, 2021
    Date of Patent: December 27, 2022
    Assignee: Wiwynn Corporation
    Inventors: Jing-Suei Gao, Ming-Chih Kao
  • Patent number: 11532324
    Abstract: The present disclosure generally relates to a read head assembly having a dual free layer (DFL) structure disposed between a first shield and a second shield at a media facing surface. The read head assembly further comprises a rear hard bias (RHB) structure disposed adjacent to the DFL structure recessed from the media facing surface, where an insulation layer separates the RHB structure from the DFL structure. The insulation layer is disposed perpendicularly between the first shield and the second shield. The DFL structure comprises a first free layer and a second free layer having equal stripe heights from the media facing surface to the insulation layer. The RHB structure comprises a seed layer, a bulk layer, and a capping layer. The capping layer and the insulation layer prevent the bulk layer from contacting the second shield.
    Type: Grant
    Filed: February 24, 2021
    Date of Patent: December 20, 2022
    Assignee: Western Digital Technologies, Inc.
    Inventors: Ming Mao, Chen-Jung Chien, Daniele Mauri, Goncalo Marcos Baião De Albuquerque
  • 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: 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: 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: 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: 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