Patents by Inventor Yukiko Kubota

Yukiko Kubota has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10453487
    Abstract: A stack includes a substrate and a magnetic recording layer. Disposed between the substrate and magnetic recording layer is an MgO—Ti(ON) layer.
    Type: Grant
    Filed: December 10, 2015
    Date of Patent: October 22, 2019
    Assignee: Seagate Technology LLC
    Inventors: Yukiko Kubota, Timothy John Klemmer, Kai Chieh Chang, Li Gao, Yinfeng Ding, Yingguo Peng, Jan-Ulrich Thiele
  • Patent number: 10310182
    Abstract: The embodiments disclose a stack feature of a stack configured to confine optical fields within and to a patterned plasmonic underlayer in the stack configured to guide light from a light source to regulate optical coupling.
    Type: Grant
    Filed: October 16, 2013
    Date of Patent: June 4, 2019
    Assignee: Seagate Technology LLC
    Inventors: Ganping Ju, Chubing Peng, Xiaobin Zhu, Yingguo Peng, Yukiko Kubota, Timothy J Klemmer, Jan-Ulrich Thiele, Michael A. Seigler, Werner Scholz, Kim Y. Lee, David S. Kuo, Koichi Wago
  • Patent number: 10269382
    Abstract: A stack includes a heatsink layer, a magnetic recording layer disposed over the heatsink layer, and a Si-based overcoat layer disposed over the magnetic recording layer. The Si-based overcoat layer is substantially devoid of carbon.
    Type: Grant
    Filed: March 22, 2018
    Date of Patent: April 23, 2019
    Assignee: Seagate Technology LLC
    Inventors: Florin Zavaliche, Timothy J. Klemmer, Yukiko Kubota, Paul M. Jones, Fujian Huang
  • Publication number: 20190027173
    Abstract: An apparatus is disclosed. The apparatus includes a first write layer, a second write layer, and a storage layer. The first write layer is disposed over the storage layer. The second write layer is disposed over the first write layer. The anisotropy field of the storage layer is greater than anisotropy field of the first write layer. The anisotropy field of the first write layer is greater than anisotropy field of the second write layer. The Curie temperature of the second write layer is greater than the Curie temperature of the first write layer. The Curie temperature of the first write layer is greater than a Curie temperature of the storage layer.
    Type: Application
    Filed: July 19, 2017
    Publication date: January 24, 2019
    Inventors: YinFeng DING, Pin-Wei HUANG, Ganping JU, Yingguo PENG, Li GAO, Timothy J. KLEMMER, Kai-Chieh CHANG, Yukiko KUBOTA, Florin ZAVALICHE, Xiaobin ZHU, Qihong WU, Hassib AMINI, Jan-Ulrich THIELE
  • Patent number: 10096335
    Abstract: A data device may have at least a magnetic lamination with a thermal retention structure deposited on a substrate and configured to maintain a predetermined temperature for a predetermined amount of time. Such predetermined temperature and amount of time may allow for the growth of a magnetic layer with a predetermined magnetic anisotropy.
    Type: Grant
    Filed: January 22, 2016
    Date of Patent: October 9, 2018
    Assignee: Seagate Technology LLC
    Inventor: Yukiko Kubota
  • Patent number: 10026432
    Abstract: A magnetic stack includes a interlayer structure and a magnetic recording layer disposed over the interlayer in the magnetic stack. The magnetic recording layer includes substantially ordered L10, <001> oriented crystalline magnetic grains laterally separated by a nonmagnetic, segregant material. The interlayer structure comprises a first layer having cubic crystal structure including <100> oriented crystalline grains and a second layer having crystalline grains laterally separated by a segregant material. The crystalline grains of the second layer are arranged in substantially vertically contiguous alignment with the crystalline grains of the first layer and the segregant material of the magnetic recording layer is arranged in substantially vertically contiguous alignment with the segregant material of the second layer.
    Type: Grant
    Filed: March 7, 2013
    Date of Patent: July 17, 2018
    Assignee: Seagate Technology LLC
    Inventors: Thomas P. Nolan, Kai Chieh Chang, Yukiko Kubota, Yingguo Peng, Jan-Ulrich Thiele
  • Patent number: 9984709
    Abstract: An apparatus is disclosed. The apparatus includes a storage layer, a thermal exchange control layer disposed over the storage layer, and a write layer disposed over the thermal exchange control layer. A Curie temperature of the thermal exchange control layer is lower than a Curie temperature of the storage layer. The Curie temperature of the thermal exchange control layer is lower than a Curie temperature of the write layer.
    Type: Grant
    Filed: March 22, 2017
    Date of Patent: May 29, 2018
    Assignee: Seagate Technology LLC
    Inventors: Pin-Wei Huang, YinFeng Ding, YingGuo Peng, Xiaobin Zhu, Kai-Chieh Chang, Yukiko Kubota, Timothy J. Klemmer, QiHong Wu, Ganping Ju, Jan-Ulrich Thiele, Florin Zavaliche
  • Patent number: 9940962
    Abstract: In some embodiments, a thermally assisted data recording medium has a recording layer formed of iron (Fe), platinum (Pt) and a transition metal T selected from a group consisting of Rhodium (Rh), Ruthenium (Ru), Osmium (Os) and Iridium (Ir) to substitute for a portion of the Pt content as FeYPtY-XTX with Y in the range of from about 20 at % to about 80 at % and X in the range of from about 0 at % to about 20 at %.
    Type: Grant
    Filed: August 28, 2015
    Date of Patent: April 10, 2018
    Assignee: Seagate Technology LLC
    Inventors: Jan-Ulrich Thiele, Yinfeng Ding, YingGuo Peng, Kai-Chieh Chang, Timothy John Klemmer, Li Gao, Yukiko Kubota, Ganping Ju
  • Patent number: 9940953
    Abstract: A stack includes a heatsink layer, a magnetic recording layer disposed over the heatsink layer, and a Si-based overcoat layer disposed over the magnetic recording layer. The Si-based overcoat layer is substantially devoid of carbon.
    Type: Grant
    Filed: October 25, 2016
    Date of Patent: April 10, 2018
    Assignee: SEAGATE TECHNOLOGY LLC
    Inventors: Florin Zavaliche, Timothy J. Klemmer, Yukiko Kubota, Paul M. Jones, Fujian Huang
  • 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: 9672854
    Abstract: A stack includes a substrate and a magnetic recording layer. Disposed between the substrate and magnetic recording layer is an MgO—Ti(ON) layer.
    Type: Grant
    Filed: October 31, 2013
    Date of Patent: June 6, 2017
    Assignee: SEAGATE TECHNOLOGY LLC
    Inventors: Yukiko Kubota, Timothy J. Klemmer, Kai Chieh Chang, Li Gao, Yinfeng Ding, Yingguo Peng, Jan-Ulrich Thiele
  • Patent number: 9502065
    Abstract: Various magnetic stack embodiments may be constructed with a soft magnetic underlayer (SUL) having a first thickness disposed between a substrate and a magnetic recording layer. A heatsink may have a second thickness and be disposed between the SUL and the magnetic recording layer. The first and second thicknesses may each be tuned to provide predetermined thermal conductivity and magnetic permeability throughout the data media.
    Type: Grant
    Filed: September 19, 2014
    Date of Patent: November 22, 2016
    Assignee: Seagate Technology LLC
    Inventors: KaiChieh Chang, Xiaobin Zhu, Yinfeng Deng, Ganping Ju, Timothy J. Klemmer, Yukiko Kubota, Thomas P. Nolan, YingGuo Peng, Jan-Ulrich Thiele, Qihong Wu
  • Patent number: 9349402
    Abstract: Provided herein is an apparatus comprising a substrate; a continuous layer over the substrate comprising a first heat sink layer; and a plurality of features over the continuous layer comprising a second heat sink layer, a first magnetic layer over the second heat sink layer, and a second magnetic layer, wherein the first and second magnetic layers are configured to provide a temperature-dependent, exchange spring mechanism.
    Type: Grant
    Filed: February 10, 2015
    Date of Patent: May 24, 2016
    Assignee: Seagate Technology LLC
    Inventors: Xi Chen, Ganping Ju, Yingguo Peng, Timothy J. Klemmer, Yukiko Kubota, Jan-Ulrich Thiele, David S. Kuo, Kai-Chieh Chang, Kangkang Wang, Li Gao, Yinfeng Ding
  • Publication number: 20160140993
    Abstract: A data device may have at least a magnetic lamination with a thermal retention structure deposited on a substrate and configured to maintain a predetermined temperature for a predetermined amount of time. Such predetermined temperature and amount of time may allow for the growth of a magnetic layer with a predetermined magnetic anisotropy.
    Type: Application
    Filed: January 22, 2016
    Publication date: May 19, 2016
    Inventor: Yukiko Kubota
  • Patent number: 9311948
    Abstract: A perpendicular magnetic recording layer of a magnetic recording medium includes a plurality of bit-patterned magnetic islands, wherein each of the plurality of islands overlay a soft magnetic under-layer. Each of the magnetic islands includes a first magnetic sub-layer adjacent a second magnetic sub-layer, wherein the first sub-layer has a relatively high magnetic anisotropy that is greater than a magnetic anisotropy of the second sub-layer. The magnetic recording layer further includes a third sub-layer, which extends to connect each of the plurality of islands. The third sub-layer may have a magnetic anisotropy that is less than that of the second sub-layer of each of the magnetic islands and/or may serve as an interlayer, extending between the first sub-layer and the soft magnetic under-layer of the recording medium, and having a structure to help to produce the greater anisotropy first magnetic sub-layer.
    Type: Grant
    Filed: December 31, 2008
    Date of Patent: April 12, 2016
    Assignee: Seagate Technology LLC
    Inventors: Erol Girt, Dieter K. Weller, Alexander Y. Dobin, Bogdan F. Valcu, Thomas F. Ambrose, Yingguo Peng, Yukiko A. Kubota, Abebe Hailu
  • Publication number: 20160099016
    Abstract: A stack includes a substrate and a magnetic recording layer. Disposed between the substrate and magnetic recording layer is an MgO—Ti(ON) layer.
    Type: Application
    Filed: December 10, 2015
    Publication date: April 7, 2016
    Inventors: Yukiko Kubota, Timothy John Klemmer, Kai Chieh Chang, Li Gao, Yinfeng Ding, Yingguo Peng, Jan-Ulrich Thiele
  • Publication number: 20160064022
    Abstract: In some embodiments, a thermally assisted data recording medium has a recording layer formed of iron (Fe), platinum (Pt) and a transition metal T selected from a group consisting of Rhodium (Rh), Ruthenium (Ru), Osmium (Os) and Iridium (Ir) to substitute for a portion of the Pt content as FeYPtY-XTX with Y in the range of from about 20 at % to about 80 at % and X in the range of from about 0 at % to about 20 at %.
    Type: Application
    Filed: August 28, 2015
    Publication date: March 3, 2016
    Inventors: Jan-Ulrich Thiele, Yinfeng Ding, YingGuo Peng, Kai-Chieh Chang, Timothy John Klemmer, Li Gao, Yukiko Kubota, Ganping Ju
  • Patent number: 9263077
    Abstract: A data device may have at least a magnetic lamination with a thermal retention structure deposited on a substrate and configured to maintain a predetermined temperature for a predetermined amount of time. Such predetermined temperature and amount of time may allow for the growth of a magnetic layer with a predetermined magnetic anisotropy.
    Type: Grant
    Filed: April 9, 2012
    Date of Patent: February 16, 2016
    Inventor: Yukiko Kubota
  • Patent number: 9263076
    Abstract: A magnetic stack includes a heatsink layer comprising (200) Cu or (200) CuX, a magnetic recording layer, and an interlayer disposed between the heatsink layer and the magnetic recording layer.
    Type: Grant
    Filed: March 7, 2013
    Date of Patent: February 16, 2016
    Assignee: Seagate Technology LLC
    Inventors: Yingguo Peng, Kai Chieh Chang, Yinfeng Ding, Ganping Ju, Yukiko Kubota, Timothy J. Klemmer, Jan-Ulrich Thiele, Qihong Wu, Xiaobin Zhu
  • Patent number: 9207024
    Abstract: The embodiments disclose at least one predetermined patterned layer configured to eliminate a physical path of lateral thermal bloom in a recording device, at least one gradient layer coupled to the patterned layer and configured to use materials with predetermined thermal conductivity for controlling a rate of dissipation and a path coupled to the gradient layer and configured to create a path of least thermal conduction resistance for directing dissipation along the path, wherein the path substantially regulates and prevents lateral thermal bloom.
    Type: Grant
    Filed: October 16, 2013
    Date of Patent: December 8, 2015
    Assignee: Segate Technology LLC
    Inventors: Ganping Ju, Xiaobin Zhu, Chubing Peng, Yukiko A. Kubota, Yingguo Peng, Timothy J. Klemmer, Jan-Ulrich Thiele, David S. Kuo, Bin Lu, Julius K. Hohlfeld