Patents by Inventor Anusha Natarajarathinam

Anusha Natarajarathinam 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).

  • Recessed hardmask used to form heat-assisted magnetic recording near-field transducer with heat sink
    Patent number: 11456008
    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: March 4, 2019
    Date of Patent: September 27, 2022
    Assignee: Seagate Technology LLC
    Inventors: Anusha Natarajarathinam, Yongjun Zhao, Hui Brickner, Dongsung Hong
  • RECESSED HARDMASK USED TO FORM HAMR NFT HEAT SINK
    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
  • Recessed hardmask used to form HAMR NFT heat sink
    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
  • RECESSED HARDMASK USED TO FORM HAMR NFT HEAT SINK
    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