Patents by Inventor Andreas Volker Stier

Andreas Volker Stier 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).

  • Method of protecting a magnetic layer of a magnetic recording medium
    Patent number: 11848037
    Abstract: A method of protecting a magnetic layer of a magnetic recording medium is provided to reduce the thickness of the magnetic spacing while improving corrosion resistance and tribological performance of the magnetic recording medium.
    Type: Grant
    Filed: July 29, 2016
    Date of Patent: December 19, 2023
    Assignee: National University of Singapore
    Inventors: Barbaros Oezyilmaz, Andreas Volker Stier, Chee Tat Toh, Antonio Helio Castro Neto
  • Method of pulsed laser-based large area graphene synthesis on metallic and crystalline substrates
    Patent number: 10683586
    Abstract: A method of making graphene includes providing a seed gas in the presence of a metallic substrate, providing a pulsed, ultraviolet laser beam, and moving the substrate or the laser beam relative to the other, thereby advancing a graphene crystallization front and forming an ordered graphene structure. In some instances, the substrate can have a surface with two-fold atomic symmetry. A method of recrystallizing graphene includes providing a pulsed, ultraviolet laser beam to a polycrystalline graphene sheet.
    Type: Grant
    Filed: February 4, 2015
    Date of Patent: June 16, 2020
    Assignee: National University of Singapore
    Inventors: Barbaros Ozyilmaz, Andreas Volker Stier, Chee Tat Toh, Antonio Helio Castro Neto
  • GRAPHENE AS A PROTECTIVE OVERCOAT FOR MAGNETIC MEDIA WITHOUT THE USE OF A NUCLEATION LAYER
    Publication number: 20170186457
    Abstract: A graphene layer, used as an anti-corrosive protection medium for magnetic media, overcomes the existing problem of reducing the carbon overcoat layer thickness for magnetic media. Unlike the amorphous carbon that is currently used as an anti-corrosion layer, the impenetrability of graphene to all known gaseous substances enables full corrosion protection of the underlying magnetic medium with a layer of graphene that may be, for example, as thin as a single layer of graphene. The dry transfer of graphene onto magnetic recording disks is enabled, such that the resulting interface of the graphene with the magnetic layer is protested from contact with impurities.
    Type: Application
    Filed: April 7, 2015
    Publication date: June 29, 2017
    Inventors: Wah Lawrence Ng, Andreas Volker Stier, Iñigo Martin Fernandez, Barbaros Özyilmaz, Antonio Helio Castro Neto
  • METHOD OF PROTECTING A MAGNETIC LAYER OF A MAGNETIC RECORDING MEDIUM
    Publication number: 20170032815
    Abstract: A method of protecting a magnetic layer of a magnetic recording medium is provided to reduce the thickness of the magnetic spacing while improving corrosion resistance and tribological performance of the magnetic recording medium.
    Type: Application
    Filed: July 29, 2016
    Publication date: February 2, 2017
    Inventors: Barbaros OEZYILMAZ, Andreas Volker STIER, Chee Tat TOH, Antonio Helio CASTRO NETO
  • Method Of Pulsed Laser-Based Large Area Graphene Synthesis On Metallic And Crystalline Substrates
    Publication number: 20160340797
    Abstract: A method of making graphene includes providing a seed gas in the presence of a metallic substrate, providing a pulsed, ultraviolet laser beam, and moving the substrate or the laser beam relative to the other, thereby advancing a graphene crystallization front and forming an ordered graphene structure. In some instances, the substrate can have a surface with two-fold atomic symmetry. A method of recrystallizing graphene includes providing a pulsed, ultraviolet laser beam to a polycrystalline graphene sheet.
    Type: Application
    Filed: February 4, 2015
    Publication date: November 24, 2016
    Applicant: National University of Singapore
    Inventors: Barbaros Ozyilmaz, Andreas Volker Stier, Chee Tat Toh, Antonio Helio Castro Neto