Patents by Inventor Roger Su-Tsung Tsai

Roger Su-Tsung Tsai 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: 7893423
    Abstract: A device and method associated with carbon nanowires, such as single walled carbon nanowires having a high degree of alignment are set forth herein. A catalyst layer is deposited having a predetermined crystallographic configuration so as to control a growth parameter, such as an alignment direction, a diameter, a crystallinity and the like of the carbon nanowire. The catalyst layer is etched to expose a sidewall portion. The carbon nanowire is nucleated from the exposed sidewall portion. An electrical circuit device can include a single crystal substrate, such as Silicon, and a crystallographically oriented catalyst layer on the substrate having an exposed sidewall portion. In the device, carbon nanowires are disposed on the single crystal substrate aligned in a direction associated with the crystallographic properties of the catalyst layer.
    Type: Grant
    Filed: January 21, 2010
    Date of Patent: February 22, 2011
    Assignee: Northrop Grumman Systems Corporation
    Inventors: Vincent Gambin, Roger Su-Tsung Tsai
  • Publication number: 20100127240
    Abstract: A device and method associated with carbon nanowires, such as single walled carbon nanowires having a high degree of alignment are set forth herein. A catalyst layer is deposited having a predetermined crystallographic configuration so as to control a growth parameter, such as an alignment direction, a diameter, a crystallinity and the like of the carbon nanowire. The catalyst layer is etched to expose a sidewall portion. The carbon nanowire is nucleated from the exposed sidewall portion. An electrical circuit device can include a single crystal substrate, such as Silicon, and a crystallographically oriented catalyst layer on the substrate having an exposed sidewall portion. In the device, carbon nanowires are disposed on the single crystal substrate aligned in a direction associated with the crystallographic properties of the catalyst layer.
    Type: Application
    Filed: January 21, 2010
    Publication date: May 27, 2010
    Applicant: NORTHROP GRUMMAN SPACE & MISSION SYSTEMS CORP.
    Inventors: Vincent Gambin, Roger Su-Tsung Tsai
  • Patent number: 7678672
    Abstract: A device and method associated with carbon nanowires, such as single walled carbon nanowires having a high degree of alignment are set forth herein. A catalyst layer is deposited having a predetermined crystallographic configuration so as to control a growth parameter, such as an alignment direction, a diameter, a crystallinity and the like of the carbon nanowire. The catalyst layer is etched to expose a sidewall portion. The carbon nanowire is nucleated from the exposed sidewall portion. An electrical circuit device can include a single crystal substrate, such as Silicon, and a crystallographically oriented catalyst layer on the substrate having an exposed sidewall portion. In the device, carbon nanowires are disposed on the single crystal substrate aligned in a direction associated with the crystallographic properties of the catalyst layer.
    Type: Grant
    Filed: January 16, 2007
    Date of Patent: March 16, 2010
    Assignee: Northrop Grumman Space & Mission Systems Corp.
    Inventors: Vincent Gambin, Roger Su-Tsung Tsai
  • Publication number: 20100029063
    Abstract: A device and method associated with carbon nanowires, such as single walled carbon nanowires having a high degree of alignment are set forth herein. A catalyst layer is deposited having a predetermined crystallographic configuration so as to control a growth parameter, such as an alignment direction, a diameter, a crystallinity and the like of the carbon nanowire. The catalyst layer is etched to expose a sidewall portion. The carbon nanowire is nucleated from the exposed sidewall portion. An electrical circuit device can include a single crystal substrate, such as Silicon, and a crystallographically oriented catalyst layer on the substrate having an exposed sidewall portion. In the device, carbon nanowires are disposed on the single crystal substrate aligned in a direction associated with the crystallographic properties of the catalyst layer.
    Type: Application
    Filed: January 16, 2007
    Publication date: February 4, 2010
    Applicant: Northrop Grumman Space & Mission Systems Corporation
    Inventors: Vincent Gambin, Roger Su-Tsung Tsai
  • Patent number: 6594594
    Abstract: A method of uniquely extracting both intrinsic and parasitic components from a single set of measured S-parameters is useful for extracting a single set of measured S-parameters for the development of non-linear Field Effect Transistor (FET) models. Competitive extraction where multiple trial solutions are attempted spanning a region or space of feedback impedances is used. Extraction is followed by optimization that reduces the extracted values to a model that better fits measured S-parameters. Optimization can be achieved by further evaluating the speed of convergence in an error metric.
    Type: Grant
    Filed: October 5, 2000
    Date of Patent: July 15, 2003
    Assignee: Northrop Grumman Corporation
    Inventor: Roger Su-Tsung Tsai