Patents Examined by Craig A. Renner
  • Patent number: 10839828
    Abstract: The present disclosure generally relates to data storage devices, and more specifically, to a magnetic media drive employing a magnetic recording head. The head includes a trailing shield, a main pole, side shields surrounding at least a portion of the main pole, and a structure disposed between the trailing shield and the main pole. The structure includes one or more layers and a seed layer. The seed layer is connected to one or more electrical leads to provide an electrical path from the leads to the one or more layers during operation. The seed layer guides the electrical current to the one or more layers and improves heat dissipation of the one or more layers, leading to a reduction in hot spots formed in the one or more layers.
    Type: Grant
    Filed: February 15, 2019
    Date of Patent: November 17, 2020
    Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.
    Inventors: Quang Le, Hongquan Jiang, Michael Kuok San Ho
  • Patent number: 10839835
    Abstract: A dual stage actuated suspension has a first piezoelectric microactuator on the trace gimbal assembly (TGA), and a pseudo feature located laterally opposite the microactuator. The pseudo feature is formed integrally with the TGA from at least one of the base metal layer, the insulative layer, and the conductive layer that make up the TGA. The pseudo feature helps to balance the suspension. The suspension can optionally have a second microactuator located proximal of the first microactuator in order to perform coarser positioning than the first microactuator, such that the suspension is a tri-stage actuated suspension.
    Type: Grant
    Filed: March 25, 2019
    Date of Patent: November 17, 2020
    Assignee: Magnecomp Corporation
    Inventors: Peter Hahn, Kuen Chee Ee, Long Zhang, David Glaess
  • Patent number: 10832718
    Abstract: Disclosed herein are sliders that include at least one leading-edge pocket, data storage devices comprising such sliders, and methods of manufacturing such sliders. The at least one leading-edge pocket increases the amount of gas flowing into the leading edge area of the ABS, which can improve the performance of the slider in low-pressure environments, such as sealed helium data storage devices. The at least one leading-edge pocket can have a variety of shapes, sizes, and features to achieve the desired slider performance (e.g., fly height, stability, etc.) in low-pressure environments.
    Type: Grant
    Filed: March 26, 2020
    Date of Patent: November 10, 2020
    Assignee: Western Digital Technologies, Inc.
    Inventors: Yong Hu, Weidong Huang
  • Patent number: 10832711
    Abstract: Methods, devices, and compositions for use with spintronic devices such as magnetic random access memory (MRAM) and spin-logic devices are provided. Methods include manipulating magnetization states in spintronic devices and making a structure using spin transfer torque to induce magnetization reversal. A device described herein manipulates magnetization states in spintronic devices and includes a non-magnetic metal to generate spin current based on the giant spin Hall effect, a ferromagnetic thin film with perpendicular magnetic anisotropy, an oxide thin film, and an integrated magnetic sensor. The device does not require an insertion layer between a non-magnetic metal with giant spin Hall effect and a ferromagnetic thin film to achieve perpendicular magnetic anisotropy.
    Type: Grant
    Filed: December 17, 2018
    Date of Patent: November 10, 2020
    Assignee: BROWN UNIVERSITY
    Inventors: Gang Xiao, Qiang Hao
  • Patent number: 10832724
    Abstract: A system, according to one embodiment, includes: a module having transducers positioned along a tape bearing surface of the module, and a roller guide. A patterned bar is also positioned relative to the roller guide and module to engage a magnetic tape. Moreover, the patterned bar has a plurality of recessed regions along a tape bearing surface thereof. The patterned bar is also not directly coupled to the module, and both edges of the patterned bar which engage the magnetic tape are skiving edges. Other systems, methods, and computer program products are described in additional embodiments.
    Type: Grant
    Filed: October 24, 2019
    Date of Patent: November 10, 2020
    Assignee: International Business Machines Corporation
    Inventors: David H. F. Harper, Peter Reininger
  • Patent number: 10811047
    Abstract: Disclosed herein are magnetic storage media with embedded disconnected circuits, and magnetic storage systems comprising such media. A magnetic storage media comprises a recording layer comprising a storage location, and an embedded disconnected circuit (EDC) configured to assist in at least one of writing to or reading from the storage location in response to a wireless activation signal. A magnetic storage system comprises a signal generator configured to generate a wireless activation signal, a magnetic storage media with a plurality of storage locations, and a write transducer and/or a read receiver. The magnetic storage media has at least one EDC configured to assist in writing to and/or reading from at least one of the plurality of storage locations in response to the wireless activation signal.
    Type: Grant
    Filed: May 26, 2020
    Date of Patent: October 20, 2020
    Assignee: Western Digital Technologies, Inc.
    Inventors: Pankaj Mehra, Bernd Lamberts, Sridhar Chatradhi, Jordan A. Katine
  • Patent number: 10811037
    Abstract: According to one embodiment, a magnetic head includes a magnetic pole, a first shield, a magnetic layer, a first conductive layer, and a second conductive layer. The magnetic layer is provided between the magnetic pole and the first shield. The first conductive layer includes at least one of Cu, Ag, Au, Al and Cr, and is provided between the magnetic pole and the first shield. A direction from the first conductive layer toward the magnetic layer crosses a first direction from the magnetic pole toward the first shield. A second conductive layer includes at least one of Ta, Pt, W, Ru, Mo, Ir, Rh, and Pd and is provided at one of a first position or a second position. The first position is between the first conductive layer and the first shield. The second position is between the magnetic pole and the first conductive layer.
    Type: Grant
    Filed: March 12, 2019
    Date of Patent: October 20, 2020
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
    Inventors: Hirofumi Suto, Naoyuki Narita, Tazumi Nagasawa, Masayuki Takagishi, Tomoyuki Maeda
  • Patent number: 10803889
    Abstract: An apparatus according to one approach includes a servo reader transducer structure on a module. The servo reader transducer structure has a lower shield, an upper shield above the lower shield, the upper and lower shields providing magnetic shielding, a current-perpendicular-to-plane sensor between the upper and lower shields, an electrical lead layer between the sensor and one of the shields, and a spacer layer between the electrical lead layer and the one of the shields. The electrical lead layer is in electrical communication with the sensor. The conductivity of the electrical lead layer is higher than the conductivity of the spacer layer. An array of writers is also present on the module. Writer modules having this structure are less susceptible to shorting, and therefore enable use of TMR servo readers on writer modules.
    Type: Grant
    Filed: February 21, 2019
    Date of Patent: October 13, 2020
    Assignee: International Business Machines Corporation
    Inventors: Robert G. Biskeborn, Calvin S. Lo
  • Patent number: 10796727
    Abstract: The present disclosure relates to using solid state deposition to selectively and strategically manage one or more properties of one or more portions of a data storage device. Material deposited via solid-state deposition can be used to prepare a surface for subsequent treatment (e.g., welding), to join two or more substrates together, and/or to seal one or more joints or surfaces to control, e.g., the humidity in the interior of a data storage device. The present disclosure also involves related data storage devices.
    Type: Grant
    Filed: May 8, 2019
    Date of Patent: October 6, 2020
    Assignee: Seagate Technology LLC
    Inventors: Jerome Coffey, Sam Severson, David Lapp
  • Patent number: 10789976
    Abstract: According to one embodiment, a magnetic head includes a magnetic pole, a first shield, a second shield, a first stacked body and a second stacked body. At least a portion of the magnetic pole is provided between the first and second shields. The first stacked body is provided between the magnetic pole and the first shield. The second stacked body is provided between the magnetic pole and the second shield. The first stacked body includes a first magnetic layer including, a first conductive layer provided between the magnetic pole and the first magnetic layer, and a second conductive layer provided between the first magnetic layer and the first shield. The second stacked body includes a second magnetic layer including, a third conductive layer provided between the magnetic pole and the second magnetic layer, and a fourth conductive layer provided between the second magnetic layer and the second shield.
    Type: Grant
    Filed: March 12, 2019
    Date of Patent: September 29, 2020
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
    Inventors: Naoyuki Narita, Tomoyuki Maeda
  • Patent number: 10789978
    Abstract: A dual stage actuated suspension has a first piezoelectric microactuator on the trace gimbal assembly (TGA), and a pseudo feature located laterally opposite the microactuator. The pseudo feature is formed integrally with the TGA from at least one of the base metal layer, the insulative layer, and the conductive layer that make up the TGA. The pseudo feature helps to balance the suspension. The suspension can optionally have a second microactuator located proximal of the first microactuator in order to perform coarser positioning than the first microactuator, such that the suspension is a tri-stage actuated suspension.
    Type: Grant
    Filed: August 31, 2018
    Date of Patent: September 29, 2020
    Assignee: Magnecomp Corporation
    Inventors: Kuen Chee Ee, Long Zhang, David Glaess
  • Patent number: 10777223
    Abstract: The present invention provides a method of feeding an agent, capable of stabilizing a remaining agent of a feeding part in characteristic and amount just before definitively feeding an agent to each definitive portion. The method includes intermittently moving a feeding part to a plurality of definitive portions defined on a structural object to definitively feed a flowable agent with a predetermined amount to each one of the definitive portions. The structural object includes a semi-finished product part with the definitive portions and a frame to be separated from the semi-finished product part. The frame includes a waste portion for the flowable agent. The waste portion has a same form as the definitive portions. The feeding part wastefully feeds the flowable agent to the waste portion with a same amount as the predetermined amount and thereafter starts the intermittently moving for the definitively feeding of the flowable agent.
    Type: Grant
    Filed: January 31, 2018
    Date of Patent: September 15, 2020
    Assignee: NHK SPRING CO., LTD.
    Inventors: Yoshihiro Teramoto, Masaru Inoue, Takeshi Shimoda
  • Patent number: 10777220
    Abstract: Dual and triple PMR writers are disclosed wherein the number of writer pads required to energize the selected PMR writer is minimized to three or four, respectively, with a coil configuration wherein separate top coils are connected by separate interconnects or side taps to separate bottom coils. Either top coils or bottom coils may be linked to a common W? pad. Alternatively, there may be one bottom coil that allows all output current to flow to a common W? pad. Coils may have a pancake or helical shape. In dual PMR writer embodiments, there may be one or two dynamic fly height heater coils. Magnetic performance in the selected writer of a dual PMR writer is similar to that of a single PMR writer with regard to erase width in AC mode (EWAC), Hy field, trailing and side shield return fields, down-track and cross-track gradient.
    Type: Grant
    Filed: April 30, 2018
    Date of Patent: September 15, 2020
    Assignee: Headway Technologies, Inc.
    Inventors: Yue Liu, Ying Liu, Yuhui Tang
  • Patent number: 10762916
    Abstract: A disk drive head assembly includes a spin torque oscillator (STO) situated between a main pole and a trailing shield. A head-disk interference (HDI) sensor is placed between the main pole and a read sensor shield. A trace is connected between a preamplifier and the head assembly for providing a first biasing voltage level to the spin torque oscillator (STO) and to the head-disk interference (HDI) sensor for determining resistance changes in the head-disk interference (HDI) sensor. Further, the preamplifier is configured for determining a resistance change in the head-disk interference (HDI) sensor based on a change in current through the head-disk interference (HDI) sensor. The spin torque oscillator (STO) and the head-disk interference (HDI) sensor are connected in parallel to two connectors from the two contacting pads on the preamplifier.
    Type: Grant
    Filed: March 5, 2019
    Date of Patent: September 1, 2020
    Assignee: Headway Technologies, Inc.
    Inventor: Yan Wu
  • Patent number: 10762919
    Abstract: A perpendicular magnetic recording write head includes a main portion formed of conventional high-moment magnetic materials, and a beveled or tapered trailing portion formed of a Co/Fe multilayer with negative magnetic anisotropy (negative anisotropy constant or —Ku). The Co/Fe multilayer tapered trailing portion has a high saturation magnetization (Ms) and thus functions as part of the write pole to direct the flux perpendicularly to the recording layer. Also, the —Ku Co/Fe multilayer tapered trailing portion has its hard axis oriented substantially orthogonal to the layer thickness and thus substantially prevents flux leakage into the write gap. The —Ku Co/Fe multilayer may also be formed on the sides of the write pole in the cross-track direction to prevent flux leakage into the side gaps.
    Type: Grant
    Filed: January 30, 2018
    Date of Patent: September 1, 2020
    Assignee: Western Digital Technologies, Inc.
    Inventors: Suping Song, Zhanjie Li, Yaguang Wei, Terence Tin-Lok Lam, Kuok San Ho
  • Patent number: 10755732
    Abstract: An apparatus according to one embodiment includes a module having a plurality of tunnel valve read transducers arranged in an array extending along the tape bearing surface of the module. Each of the tunnel valve read transducers has upper and lower shields for providing magnetic shielding. A sensor structure is positioned between the shields. An electrical lead layer is positioned between the sensor structure and one of the shields. The electrical lead layer is in electrical communication with the sensor structure. A spacer layer is positioned between the electrical lead layer and the one of the shields. A conductivity of the electrical lead layer is higher than a conductivity of the spacer layer. At least some of the sensor structures are recessed from a plane extending along the tape bearing surface. An at least partially polycrystalline coating is positioned on a media facing side of the recessed sensor structures.
    Type: Grant
    Filed: December 12, 2017
    Date of Patent: August 25, 2020
    Assignee: International Business Machines Corporation
    Inventors: Robert G. Biskeborn, Calvin S. Lo
  • Patent number: 10755733
    Abstract: A read head includes a first ferromagnetic layer, a second ferromagnetic layer, a first diffusion-assist nonmagnetic metallic layer located between the first ferromagnetic layer and the second ferromagnetic layer, a second diffusion-assist nonmagnetic metallic layer located between the first ferromagnetic layer and the second ferromagnetic layer, and a semiconductor spacer layer located between the first diffusion-assist nonmagnetic metallic layer and the second diffusion-assist nonmagnetic metallic layer.
    Type: Grant
    Filed: March 5, 2019
    Date of Patent: August 25, 2020
    Assignee: SANDISK TECHNOLOGIES LLC
    Inventors: Yuankai Zheng, Christian Kaiser, Zhitao Diao
  • Patent number: 10748560
    Abstract: An apparatus according to one embodiment includes a module having a tape bearing surface. The tape bearing surface extends between first and second edges of the module. A first tape tenting region extends from the first edge along the tape bearing surface toward the second edge. Each tunnel valve read transducer is positioned in the first tape tenting region. A plurality of tunnel valve read transducers are arranged in an array extending along the tape bearing surface of the module in the first tape tenting region. Each of the tunnel valve read transducers includes a sensor structure having a tunnel barrier layer. At least some of the sensor structures are recessed from a plane extending along the tape bearing surface. An at least partially polycrystalline coating is located on a media facing side of the recessed sensor structures.
    Type: Grant
    Filed: December 11, 2017
    Date of Patent: August 18, 2020
    Assignee: International Business Machines Corporation
    Inventors: Robert G. Biskeborn, Calvin S. Lo
  • Patent number: 10748566
    Abstract: A disk drive head suspension or flexure and method of manufacture. Embodiments include a portion such as a terminal pad or flying lead comprising a base layer, a dielectric layer on the base layer, a conductor layer, a seed layer between the dielectric layer and the conductor layer, and a noncorrosive metal layer on the seed layer side of the conductor layer. The seed layer has a strip that extends beyond the edge of the dielectric layer. The noncorrosive metal layer extends over the strip of the seed layer and into contact with the edge of the dielectric layer.
    Type: Grant
    Filed: May 13, 2019
    Date of Patent: August 18, 2020
    Assignee: Hutchinson Technology Incorporated
    Inventors: Michael C. Christenson, David M. Groschen
  • Patent number: 10741202
    Abstract: The present disclosure generally relates to a magnetic media drive employing a magnetic recording head. The head includes a main pole at a media facing surface (MFS), a trailing shield at the MFS, and a MAMR stack disposed between the main pole and the trailing shield at the MFS. The MAMR stack includes a seed layer and at least one magnetic layer. The seed layer is fabricated from a thermally conductive material having electrical resistivity lower than that of the main pole. The seed layer has a stripe height greater than a stripe height of the at least one magnetic layer. With the extended seed layer, the bias current from the trailing shield to the main pole spreads further away from the MFS along the extended seed layer before flowing into the main pole, reducing temperature rise at or near the MAMR stack, leading to improved write head reliability.
    Type: Grant
    Filed: February 14, 2019
    Date of Patent: August 11, 2020
    Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.
    Inventors: Michael Kuok San Ho, Yunfei Ding, Zhigang Bai, Yaguang Wei, Terence Lam, Goncalo Baiao de Albuquerque, Xinjiang Shen, Feng Q. Liu