Patents by Inventor Kumar Virwani

Kumar Virwani 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: 20180040819
    Abstract: A method of forming a mixed ionic electron conductor (MIEC)-based memory cell access device using a subtractive etch process is provided. After blanket depositing a MIEC material layer on a bottom electrode and a dielectric layer laterally surrounding the bottom electrode and blanket depositing a metal layer on the MIEC material layer, the metal layer and the MIEC material layer are patterned simultaneously.
    Type: Application
    Filed: August 2, 2016
    Publication date: February 8, 2018
    Inventors: Gloria Wing Yun Fraczak, Hiroyuki Miyazoe, Kumar Virwani
  • Patent number: 9773978
    Abstract: A mixed ionic electron conductor (MIEC)-based memory cell access device is provided. The MIEC-based memory cell access device includes a MIEC material portion located between a bottom electrode and a top electrode. A contact area between the MIEC material portion and the bottom electrode is substantially the same as a contact area between the MIEC material portion and the top electrode.
    Type: Grant
    Filed: August 2, 2016
    Date of Patent: September 26, 2017
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Gloria Wing Yun Fraczak, Hiroyuki Miyazoe, Kumar Virwani
  • Patent number: 7979916
    Abstract: Aspects of the invention are directed to piezoresponse force analysis of a material. A stimulus signal including a first frequency component is applied to a contact point on the material such that the stimulus signal actuates a portion of the material to experience a motion as a result of a piezoelectric effect. A resonant device is coupled to the contact point such that the resonant device experiences a resonant motion at the first frequency component in response to the motion of the material, the resonant motion having a greater displacement than a displacement of the motion of the material, and is substantially unaffected by mechanical properties of the material at the contact point. The resonant motion of the resonant device is detected and processed to produce a measurement representing the piezoresponse of the material at the contact point.
    Type: Grant
    Filed: May 26, 2009
    Date of Patent: July 12, 2011
    Inventors: Bede Pittenger, Kumar Virwani, Benedikt Zeyen
  • Publication number: 20100017923
    Abstract: Aspects of the invention are directed to piezoresponse force analysis of a material. A stimulus signal including a first frequency component is applied to a contact point on the material such that the stimulus signal actuates a portion of the material to experience a motion as a result of a piezoelectric effect. A resonant device is coupled to the contact point such that the resonant device experiences a resonant motion at the first frequency component in response to the motion of the material, the resonant motion having a greater displacement than a displacement of the motion of the material, and is substantially unaffected by mechanical properties of the material at the contact point. The resonant motion of the resonant device is detected and processed to produce a measurement representing the piezoresponse of the material at the contact point.
    Type: Application
    Filed: May 26, 2009
    Publication date: January 21, 2010
    Inventors: Bede Pittenger, Kumar Virwani, Benedikt Zeyen