Patents by Inventor Julius De Rojas

Julius De Rojas 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).

  • Synthesis of tetrataenite thin films via rapid thermal annealing
    Patent number: 10685781
    Abstract: A method for synthesis of high anisotropy L10 FeNi (tetrataenite) thin films is provided that combines physical vapor deposition via atomic layer sputtering and rapid thermal annealing with extreme heating and cooling speeds. The methods can induce L10-ordering in FeNi thin films. The process uses a base composite film of a support substrate, a seed layer, a multilayer thin film of FeNi with alternating single atomic layers of Fe and Ni that mimics the atomic plane of the final L10 FeNi alloy, and a capping layer. The Fe and Ni bilayers are grown on top of a Si substrate with a thermally oxidized SiO2 seed layer to mechanically strain the sample during rapid thermal annealing.
    Type: Grant
    Filed: November 29, 2018
    Date of Patent: June 16, 2020
    Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Kai Liu, Julius De Rojas, Dustin A. Gilbert
  • SYNTHESIS OF TETRATAENITE THIN FILMS VIA RAPID THERMAL ANNEALING
    Publication number: 20190180933
    Abstract: A method for synthesis of high anisotropy L10 FeNi (tetrataenite) thin films is provided that combines physical vapor deposition via atomic layer sputtering and rapid thermal annealing with extreme heating and cooling speeds. The methods can induce L10-ordering in FeNi thin films. The process uses a base composite film of a support substrate, a seed layer, a multilayer thin film of FeNi with alternating single atomic layers of Fe and Ni that mimics the atomic plane of the final L10 FeNi alloy, and a capping layer. The Fe and Ni bilayers are grown on top of a Si substrate with a thermally oxidized SiO2 seed layer to mechanically strain the sample during rapid thermal annealing.
    Type: Application
    Filed: November 29, 2018
    Publication date: June 13, 2019
    Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Kai Liu, Julius De Rojas, Dustin A. Gilbert