Patents by Inventor Yongjun Zhao

Yongjun Zhao 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).

  • Publication number: 20190198046
    Abstract: A method involves depositing a near-field transducer on a substrate of a slider. The near-field transducer comprises a plate-like enlarged portion and a peg portion. A first hard stop extending from the near field transducer and an air bearing surface is formed. A heat sink is formed on the enlarged portion and the first hard stop. A dielectric material is deposited over the near-field transducer and the heat sink. A second hard stop is deposited on the dielectric material away from the air bearing surface. The second hard stop comprises a recess corresponding in size and location to the heat sink. The method involves milling at an oblique angle to the substrate between the first hard stop and second hard stop to cut through the heat sink at the angle. The recess of the second hard stop increases a milling rate over the heat sink compared to a second milling rate of the dielectric away from the heat sink.
    Type: Application
    Filed: March 4, 2019
    Publication date: June 27, 2019
    Inventors: Anusha Natarajarathinam, Yongjun Zhao, Hui Brickner, Dongsung Hong
  • Patent number: 10311906
    Abstract: Devices having an air bearing surfaces (ABS), the devices including a near field transducer (NFT) that includes a disc having a front edge; a peg, the peg having a front surface at the air bearing surface of the apparatus, an opposing back surface, a top surface that extends from the front surface to the back surface, two side surfaces that expend from the front surface to the back surface and a bottom surface that extends from the front surface to the back surface; and a barrier layer, the barrier layer separating at least the back surface of the peg from the disc and the barrier layer having a thickness from 10 nm to 50 nm.
    Type: Grant
    Filed: November 20, 2017
    Date of Patent: June 4, 2019
    Assignee: Seagate Technology LLC
    Inventors: Martin Blaber, Jie Gong, Dimitar Dimitrov, Steven Riemer, Michael Kautzky, Tong Zhao, Yongjun Zhao
  • Patent number: 10224064
    Abstract: A method involves depositing a near-field transducer on a substrate of a slider. The near-field transducer comprises a plate-like enlarged portion and a peg portion. A first hard stop extending from the near field transducer and an air bearing surface is formed. A heat sink is formed on the enlarged portion and the first hard stop. A dielectric material is deposited over the near-field transducer and the heat sink. A second hard stop is deposited on the dielectric material away from the air bearing surface. The second hard stop comprises a recess corresponding in size and location to the heat sink. The method involves milling at an oblique angle to the substrate between the first hard stop and second hard stop to cut through the heat sink at the angle. The recess of the second hard stop increases a milling rate over the heat sink compared to a second milling rate of the dielectric away from the heat sink.
    Type: Grant
    Filed: January 4, 2016
    Date of Patent: March 5, 2019
    Assignee: Seagate Technology LLC
    Inventors: Anusha Natarajarathinam, Yongjun Zhao, Hui Brickner, Dongsung Hong
  • Patent number: 10217482
    Abstract: Devices that include a near field transducer (NFT), the NFT having a disc and a peg, and the peg having five surfaces thereof; and at least one adhesion layer positioned on at least one of the five surfaces of the peg, the adhesion layer including one or more of the following: yttrium (Y), tin (Sn), iron (Fe), copper (Cu), carbon (C), holmium (Ho), gallium (Ga), silver (Ag), ytterbium (Yb), chromium (Cr), tantalum (Ta), iridium (Ir), zirconium (Zr), yttrium (Y), scandium (Sc), cobalt (Co), silicon (Si), nickel (Ni), molybdenum (Mo), niobium (Nb), palladium (Pd), titanium (Ti), rhenium (Re), osmium (Os), platinum (Pt), aluminum (Al), ruthenium (Ru), rhodium (Rh), vanadium (V), germanium (Ge), tin (Sn), magnesium (Mg), iron (Fe), copper (Cu), tungsten (W), hafnium (Hf), carbon (C), boron (B), holmium (Ho), antimony (Sb), gallium (Ga), manganese (Mn), silver (Ag), indium (In), bismuth (Bi), zinc (Zn), ytterbium (Yb), and combinations thereof.
    Type: Grant
    Filed: May 26, 2017
    Date of Patent: February 26, 2019
    Assignee: Seagate Technology LLC
    Inventors: Vijay Karthik Sankar, Tong Zhao, Yongjun Zhao, Michael C. Kautzky, Hui Brickner, Sarbeswar Sahoo
  • Publication number: 20190048487
    Abstract: Methods of forming near field transducers (NFTs) including electrodepositing a plasmonic material.
    Type: Application
    Filed: October 15, 2018
    Publication date: February 14, 2019
    Inventors: Lien Lee, Jie Gong, Venkatram Venkatasamy, Yongjun Zhao, Lijuan Zou, Dongsung Hong, Ibro Tabakovic, Mark Ostrowski
  • Patent number: 10186283
    Abstract: A method of forming a peg of a NFT, the peg having a tapered portion, the method including depositing a layer of dielectric material; forming a three dimensional shape from at least a portion of the dielectric material the three dimensional shape having two side surfaces and two end surfaces; and depositing plasmonic material on at least one side surface of the three dimensional shape of dielectric material, wherein the plasmonic material deposited on the at least one side surface forms the tapered portion of the peg.
    Type: Grant
    Filed: November 11, 2015
    Date of Patent: January 22, 2019
    Assignee: Seagate Technology LLC
    Inventors: Sridhar Dubbaka, YongJun Zhao, David Michael Grundman
  • Patent number: 10100422
    Abstract: Methods of forming near field transducers (NFTs) including electrodepositing a plasmonic material.
    Type: Grant
    Filed: September 25, 2013
    Date of Patent: October 16, 2018
    Assignee: Seagate Technology LLC
    Inventors: Lien Lee, Jie Gong, Venkatram Venkatasamy, Yongjun Zhao, Lijuan Zou, Dongsung Hong, Ibro Tabakovic, Mark Ostrowski
  • Publication number: 20180202216
    Abstract: A window drive apparatus includes an electric motor and a gear train. The gear train includes a first deceleration mechanism and a second deceleration mechanism. The first deceleration mechanism includes a worm driven by the electric motor and a worm gear meshed with the worm. The second deceleration mechanism includes a first driving gear and a second driving gear coaxially fixed and respectively located at opposite sides of the worm gear, a first driven gear meshed with the first driving gear and a second driven gear meshed with the second driving gear. The first driven gear and the second driven gear are coaxially fixed together. A vehicle door including the window drive apparatus is also provided.
    Type: Application
    Filed: January 11, 2018
    Publication date: July 19, 2018
    Inventors: Jingning TA, Yue LI, Jingxin SHI, Yongjun ZHAO, Junmao FU, Qiumei LI
  • Publication number: 20180090159
    Abstract: Devices having an air bearing surface (ABS) and including a write pole; a near field transducer (NFT) that includes a peg and a disc, wherein the peg includes a rear peg portion and a peg tip, the rear peg portion and the peg tip are different materials and the peg tip includes: one or more metals; one or more nanoparticles comprising oxides, nitrides, carbides or combinations thereof; one or more conducting oxides, conducting nitrides, conducting bromides, conducting carbides, or combinations thereof; one or more semiconductors; or combinations thereof.
    Type: Application
    Filed: November 30, 2017
    Publication date: March 29, 2018
    Inventors: Tong Zhao, Yuhang Cheng, Martin Giles Blaber, Jie Gong, Edwin F. Rejda, Michael A. Seigler, Seung-Yeul Yang, Michael Kautzky, Yongjun Zhao, Justin Brons, Andrew J. Boyne, Kurt W. Wierman, Scott Franzen
  • Publication number: 20180075872
    Abstract: Devices having an air bearing surfaces (ABS), the devices including a near field transducer (NFT) that includes a disc having a front edge; a peg, the peg having a front surface at the air bearing surface of the apparatus, an opposing back surface, a top surface that extends from the front surface to the back surface, two side surfaces that expend from the front surface to the back surface and a bottom surface that extends from the front surface to the back surface; and a barrier layer, the barrier layer separating at least the back surface of the peg from the disc and the barrier layer having a thickness from 10 nm to 50 nm.
    Type: Application
    Filed: November 20, 2017
    Publication date: March 15, 2018
    Inventors: Martin Blaber, Jie Gong, Dimitar Dimitrov, Steve Riemer, Michael Kautzky, Tong Zhao, Yongjun Zhao
  • Patent number: 9824709
    Abstract: Devices having an air bearing surfaces (ABS), the devices including a near field transducer (NFT) that includes a disc having a front edge; a peg, the peg having a front surface at the air bearing surface of the apparatus, an opposing back surface, a top surface that extends from the front surface to the back surface, two side surfaces that expend from the front surface to the back surface and a bottom surface that extends from the front surface to the back surface; and a barrier layer, the barrier layer separating at least the back surface of the peg from the disc and the barrier layer having a thickness from 10 nm to 50 nm.
    Type: Grant
    Filed: May 27, 2016
    Date of Patent: November 21, 2017
    Assignee: Seagate Technology LLC
    Inventors: Martin Blaber, Jie Gong, Dimitar Dimitrov, Steve Riemer, Michael Kautzky, Tong Zhao, Yongjun Zhao
  • Publication number: 20170263276
    Abstract: Devices that include a near field transducer (NFT), the NFT having a disc and a peg, and the peg having five surfaces thereof; and at least one adhesion layer positioned on at least one of the five surfaces of the peg, the adhesion layer including one or more of the following: yttrium (Y), tin (Sn), iron (Fe), copper (Cu), carbon (C), holmium (Ho), gallium (Ga), silver (Ag), ytterbium (Yb), chromium (Cr), tantalum (Ta), iridium (Ir), zirconium (Zr), yttrium (Y), scandium (Sc), cobalt (Co), silicon (Si), nickel (Ni), molybdenum (Mo), niobium (Nb), palladium (Pd), titanium (Ti), rhenium (Re), osmium (Os), platinum (Pt), aluminum (Al), ruthenium (Ru), rhodium (Rh), vanadium (V), germanium (Ge), tin (Sn), magnesium (Mg), iron (Fe), copper (Cu), tungsten (W), hafnium (Hf), carbon (C), boron (B), holmium (Ho), antimony (Sb), gallium (Ga), manganese (Mn), silver (Ag), indium (In), bismuth (Bi), zinc (Zn), ytterbium (Yb), and combinations thereof.
    Type: Application
    Filed: May 26, 2017
    Publication date: September 14, 2017
    Inventors: Vijay Karthik Sankar, Tong Zhao, Yongjun Zhao, Michael C. Kautzky, Hui Brickner, Sarbeswar Sahoo
  • Publication number: 20170194022
    Abstract: A method involves depositing a near-field transducer on a substrate of a slider. The near-field transducer comprises a plate-like enlarged portion and a peg portion. A first hard stop extending from the near field transducer and an air bearing surface is formed. A heat sink is formed on the enlarged portion and the first hard stop. A dielectric material is deposited over the near-field transducer and the heat sink. A second hard stop is deposited on the dielectric material away from the air bearing surface. The second hard stop comprises a recess corresponding in size and location to the heat sink. The method involves milling at an oblique angle to the substrate between the first hard stop and second hard stop to cut through the heat sink at the angle. The recess of the second hard stop increases a milling rate over the heat sink compared to a second milling rate of the dielectric away from the heat sink.
    Type: Application
    Filed: January 4, 2016
    Publication date: July 6, 2017
    Inventors: Anusha Natarajarathinam, Yongjun Zhao, Hui Brickner, Dongsung Hong
  • Patent number: 9666220
    Abstract: Devices that include a near field transducer (NFT), the NFT having a disc and a peg, and the peg having five surfaces thereof; and at least one adhesion layer positioned on at least one of the five surfaces of the peg, the adhesion layer including one or more of the following: yttrium (Y), tin (Sn), iron (Fe), copper (Cu), carbon (C), holmium (Ho), gallium (Ga), silver (Ag), ytterbium (Yb), chromium (Cr), tantalum (Ta), iridium (Ir), zirconium (Zr), yttrium (Y), scandium (Sc), cobalt (Co), silicon (Si), nickel (Ni), molybdenum (Mo), niobium (Nb), palladium (Pd), titanium (Ti), rhenium (Re), osmium (Os), platinum (Pt), aluminum (Al), ruthenium (Ru), rhodium (Rh), vanadium (V), germanium (Ge), tin (Sn), magnesium (Mg), iron (Fe), copper (Cu), tungsten (W), hafnium (Hf), carbon (C), boron (B), holmium (Ho), antimony (Sb), gallium (Ga), manganese (Mn), silver (Ag), indium (In), bismuth (Bi), zinc (Zn), ytterbium (Yb), and combinations thereof.
    Type: Grant
    Filed: May 25, 2015
    Date of Patent: May 30, 2017
    Assignee: Seagate Technology LLC
    Inventors: Vijay Karthik Sankar, Tong Zhao, Yongjun Zhao, Michael C. Kautzky, Hui Brickner, Sarbeswar Sahoo
  • Patent number: 9601135
    Abstract: A device that includes a near field transducer (NFT); at least one cladding layer adjacent the NFT; and a discontinuous metal layer positioned between the NFT and the at least one cladding layer.
    Type: Grant
    Filed: January 28, 2015
    Date of Patent: March 21, 2017
    Assignee: Seagate Technology LLC
    Inventors: Tong Zhao, Michael Christopher Kautzky, Michael Allen Seigler, Yongjun Zhao, Jay Jayashankar, Xiaoyue Huang
  • Patent number: 9558764
    Abstract: A write head includes a near-field transducer near a media-facing surface of the write head. The write head includes a waveguide having a core with a first side disposed proximate to the near-field transducer. The core overlaps the near-field transducer at a substrate-parallel plane. The core includes one of a step or a taper on a second side facing away from the first side. The step or the taper causes a reduced thickness of the core normal to the substrate-parallel plane. The write head includes a cladding layer that encompassing the second side of the core and that fills in the step or the taper.
    Type: Grant
    Filed: October 19, 2015
    Date of Patent: January 31, 2017
    Assignee: SEAGATE TECHNOLOGY LLC
    Inventors: Ruoxi Yang, Pierre Asselin, Yongjun Zhao, James Gary Wessel, Tae-Woo Lee, Werner Scholz, Frank Edgar Stageberg
  • Publication number: 20160351221
    Abstract: Devices having an air bearing surfaces (ABS), the devices including a near field transducer (NFT) that includes a disc having a front edge; a peg, the peg having a front surface at the air bearing surface of the apparatus, an opposing back surface, a top surface that extends from the front surface to the back surface, two side surfaces that expend from the front surface to the back surface and a bottom surface that extends from the front surface to the back surface; and a barrier layer, the barrier layer separating at least the back surface of the peg from the disc and the barrier layer having a thickness from 10 nm to 50 nm.
    Type: Application
    Filed: May 27, 2016
    Publication date: December 1, 2016
    Inventors: Martin Blaber, Jie Gong, Dimitar Dimitrov, Steve Riemer, Michael Kautzky, Tong Zhao, Yongjun Zhao
  • Patent number: 9502069
    Abstract: A plasmonic transducer includes at least two metal elements with a gap therebetween. The metal elements are elongated along a plasmon-enhanced, near-field radiation delivery axis. Cross sections of the metal elements in a plane normal to the delivery axis vary in shape along the delivery axis. A waveguide is disposed along an elongated side of the plasmonic transducer. The waveguide is optically coupled to the plasmonic transducer along the elongated side.
    Type: Grant
    Filed: February 17, 2015
    Date of Patent: November 22, 2016
    Assignee: SEAGATE TECHNOLOGY LLC
    Inventors: Chubing Peng, Yongjun Zhao
  • Publication number: 20160275972
    Abstract: Devices having an air bearing surface (ABS) and including a write pole; a near field transducer (NFT) that includes a peg and a disc, wherein the peg includes a rear peg portion and a peg tip, the rear peg portion and the peg tip are different materials and the peg tip includes: one or more metals; one or more nanoparticles comprising oxides, nitrides, carbides or combinations thereof; one or more conducting oxides, conducting nitrides, conducting bromides, conducting carbides, or combinations thereof; one or more semiconductors; or combinations thereof.
    Type: Application
    Filed: March 17, 2016
    Publication date: September 22, 2016
    Inventors: Tong Zhao, Yuhang Cheng, Martin Giles Blaber, Jie Gong, Edwin F. Rejda, Michael A. Seigler, Seung-Yeul Yang, Michael Kautzky, Yongjun Zhao, Justin Brons, Andrew J. Boyne, Kurt W. Wierman, Scott Franzen
  • Patent number: 9437221
    Abstract: A method of making a transducer head disclosed herein includes depositing a spacer layer on an NFT layer of the transducer head, forming an etch stop layer on a spacer layer of a transducer, depositing a cladding layer on the etch stop layer, and milling the cladding layer at a sloped angle such that the milling stops at the etch stop layer.
    Type: Grant
    Filed: August 31, 2015
    Date of Patent: September 6, 2016
    Assignee: SEAGATE TECHNOLOGY LLC
    Inventors: Lien Lee, Yongjun Zhao, Lijuan Zou, Mark Henry Ostrowski