Patents by Inventor Yan Hwee Sunny Lua

Yan Hwee Sunny Lua 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: 9343128
    Abstract: A magnetoresistive device having a magnetic junction including a first fixed magnetic layer structure, a second fixed magnetic layer structure, and a free magnetic layer structure, wherein the first, second and third fixed magnetic layer structures are arranged one over the other, have respective magnetization orientations configured to orient in a direction at least substantially perpendicular to a plane, wherein the respective magnetization orientations of the first fixed magnetic layer structure and the second fixed magnetic layer structure are oriented in opposite directions, and wherein the magnetization orientation of the first fixed magnetic layer structure is configured to oscillate in a first direction in response to a current or a voltage applied across the magnetic junction so as to change the magnetization orientation of the free magnetic layer structure.
    Type: Grant
    Filed: May 17, 2012
    Date of Patent: May 17, 2016
    Assignee: Agency for Science, Technology and Research
    Inventors: Yuanhong Luo, Rachid Sbiaa, Yan Hwee Sunny Lua
  • Publication number: 20150371697
    Abstract: According to embodiments of the present invention, a magnetoresistive device is provided. The magnetoresistive device includes at least two ferromagnetic soft layers, wherein the at least two ferromagnetic soft layers have different ranges of magnetization switching frequencies. Further embodiments provide a magnetoresistive device including at least two oscillating ferromagnetic structures, wherein ranges of operating current amplitudes at which oscillations are induced for the at least two oscillating ferromagnetic structures are different. According to further embodiments of the present invention, writing methods for the magnetoresistive devices are provided.
    Type: Application
    Filed: August 27, 2015
    Publication date: December 24, 2015
    Applicant: AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH
    Inventors: Yuanhong LUO, Rachid SBIAA, Yan Hwee Sunny LUA
  • Patent number: 9123884
    Abstract: According to embodiments of the present invention, a magnetoresistive device is provided. The magnetoresistive device includes at least two ferromagnetic soft layers, wherein the at least two ferromagnetic soft layers have different ranges of magnetization switching frequencies. Further embodiments provide a magnetoresistive device including at least two oscillating ferromagnetic structures, wherein ranges of operating current amplitudes at which oscillations are induced for the at least two oscillating ferromagnetic structures are different. According to further embodiments of the present invention, writing methods for the magnetoresistive devices are provided.
    Type: Grant
    Filed: September 20, 2012
    Date of Patent: September 1, 2015
    Assignee: Agency for Science, Technology and Research
    Inventors: Yuanhong Luo, Rachid Sbiaa, Yan Hwee Sunny Lua
  • Patent number: 8780618
    Abstract: According to embodiments of the present invention, a writing circuit for a magnetoresistive memory cell is provided. The writing circuit includes a first connecting terminal configured to provide a first electrical signal to switch a variable magnetization orientation of the free magnetic layer from a first magnetization orientation to a second magnetization orientation; a second connecting terminal configured to provide a second electrical signal to switch the magnetization orientation from the second magnetization orientation to the first magnetization orientation; and a sourcing switch configured to provide for a write operation a connection of the first or second connecting terminal to a node coupleable to the magnetoresistive memory cell. The first and second electrical signals have different amplitudes, and the first and second electrical signals are of the same polarity. Further embodiments relate to a memory cell arrangement and a method of writing into a target magnetoresistive memory cell.
    Type: Grant
    Filed: December 7, 2012
    Date of Patent: July 15, 2014
    Assignee: Agency for Science, Technology and Research
    Inventors: Yan Hwee Sunny Lua, Aarthy Mani
  • Patent number: 8773897
    Abstract: A writing circuit for a magnetoresistive memory cell is provided.
    Type: Grant
    Filed: December 7, 2012
    Date of Patent: July 8, 2014
    Assignee: Agency for Science, Technology and Research
    Inventors: Yan Hwee Sunny Lua, Kejie Huang
  • Publication number: 20130343116
    Abstract: A writing circuit for a magnetoresistive memory cell is provided.
    Type: Application
    Filed: December 7, 2012
    Publication date: December 26, 2013
    Applicant: Agency for Science, Technology and Research
    Inventors: Yan Hwee Sunny Lua, Kejie Huang
  • Publication number: 20130343117
    Abstract: According to embodiments of the present invention, a writing circuit for a magnetoresistive memory cell is provided. The writing circuit includes a first connecting terminal configured to provide a first electrical signal to switch a variable magnetization orientation of the free magnetic layer from a first magnetization orientation to a second magnetization orientation; a second connecting terminal configured to provide a second electrical signal to switch the magnetization orientation from the second magnetization orientation to the first magnetization orientation; and a sourcing switch configured to provide for a write operation a connection of the first or second connecting terminal to a node coupleable to the magnetoresistive memory cell. The first and second electrical signals have different amplitudes, and the first and second electrical signals are of the same polarity. Further embodiments relate to a memory cell arrangement and a method of writing into a target magnetoresistive memory cell.
    Type: Application
    Filed: December 7, 2012
    Publication date: December 26, 2013
    Applicant: Agency for Science, Technology and Research
    Inventors: Yan Hwee Sunny Lua, Aarthy Mani
  • Publication number: 20130170279
    Abstract: A current writing circuit for a resistive memory cell arrangement is provided. The current writing circuit comprises a first current source; a first reference potential terminal; a first switch configured to switch between the first current source and the first reference potential terminal during a write operation; a second current source; a second reference potential terminal; and a second switch configured to switch between the second reference potential terminal when the first switch is switched to the first current source, and the second current source when the first switch is switched to the first reference potential terminal, during the write operation, wherein the first current source and the second current source are of the same polarity. Further embodiments relate to a memory cell arrangement and a method of writing into a target resistive memory cell of a resistive memory cell arrangement.
    Type: Application
    Filed: May 16, 2012
    Publication date: July 4, 2013
    Inventors: Kejie Huang, Yan Hwee Sunny Lua, Khoon Siah Arthur Ang
  • Publication number: 20120300531
    Abstract: A current writing circuit for a resistive memory cell arrangement is provided. The current writing circuit comprises a first current source; a first reference potential terminal; a first switch configured to switch between the first current source and the first reference potential terminal during a write operation; a second current source; a second reference potential terminal; and a second switch configured to switch between the second reference potential terminal when the first switch is switched to the first current source, and the second current source when the first switch is switched to the first reference potential terminal, during the write operation, wherein the first current source and the second current source are of the same polarity. Further embodiments relate to a memory cell arrangement and a method of writing into a target resistive memory cell of a resistive memory cell arrangement.
    Type: Application
    Filed: May 16, 2012
    Publication date: November 29, 2012
    Inventors: Kejie Huang, Yan Hwee Sunny Lua, Khoon Siah Arthur Ang
  • Publication number: 20120292723
    Abstract: A magnetoresistive device having a magnetic junction is provided.
    Type: Application
    Filed: May 17, 2012
    Publication date: November 22, 2012
    Inventors: Yuanhong Luo, Rachid Sbiaa, Yan Hwee Sunny Lua