Patents by Inventor Duncan R. Stewart

Duncan R. Stewart 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: 8351204
    Abstract: Data processing modules including a housing and optical interfaces associated with the exterior of the housing, and systems including the same.
    Type: Grant
    Filed: January 31, 2008
    Date of Patent: January 8, 2013
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Jong-Souk Yeo, R. Stanley Williams, Chandrakant D. Patel, Duncan R. Stewart
  • Patent number: 8268720
    Abstract: A method of positioning a catalyst nanoparticle that facilitates nanowire growth for nanowire-based device fabrication employs a structure having a vertical sidewall formed on a substrate. The methods include forming the structure, forming a targeted region in a surface of either the structure or the substrate, and forming a catalyst nanoparticle in the targeted region using one of a variety of techniques. The techniques control the position of the catalyst nanoparticle for subsequent nanowire growth. A resonant sensor system includes a nanowire-based resonant sensor and means for accessing the nanowire. The sensor includes an electrode and a nanowire resonator. The electrode is electrically isolated from the substrate. One or more of the substrate is electrically conductive, the nanowire resonator is electrically conductive, and the sensor further comprises another electrode. The nanowire resonator responds to an environmental change by displaying a change in oscillatory behavior.
    Type: Grant
    Filed: April 30, 2007
    Date of Patent: September 18, 2012
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Theodore I. Kamins, Zhiyong Li, Duncan R. Stewart
  • Patent number: 7906778
    Abstract: Methods of making nanometer-scale semiconductor structures with controlled size are disclosed. Semiconductor structures that include one or more nanowires are also disclosed. The nanowires can include a passivation layer or have a hollow tube structure.
    Type: Grant
    Filed: April 2, 2007
    Date of Patent: March 15, 2011
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Nobuhiko Kobayashi, Wei Wu, Duncan R Stewart, Shashank Sharma, Shih-Yuan Wang, R Stanley Williams
  • Patent number: 7880318
    Abstract: A sensing system includes a nanowire, a passivation layer established on at least a portion of the nanowire, and a barrier layer established on the passivation layer.
    Type: Grant
    Filed: April 27, 2007
    Date of Patent: February 1, 2011
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Theodore I. Kamins, Zhiyong Li, Duncan R. Stewart
  • Patent number: 7872318
    Abstract: A sensing device includes an optical cavity having two substantially opposed reflective surfaces. At least one nanowire is operatively disposed in the optical cavity. A plurality of metal nanoparticles is established on the at least one nanowire.
    Type: Grant
    Filed: October 20, 2006
    Date of Patent: January 18, 2011
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Duncan R. Stewart, Amir A. Yasseri, R. Stanley Williams, Theodore I. Kamins
  • Publication number: 20100321880
    Abstract: Data processing modules including a housing and optical interfaces associated with the exterior of the housing, and systems including the same.
    Type: Application
    Filed: January 31, 2008
    Publication date: December 23, 2010
    Inventors: Jong-Souk Yeo, R. Stanley Williams, Chandrakant D. Patel, Duncan R. Stewart
  • Patent number: 7766640
    Abstract: A contact lithography apparatus, system and method use a deformation to facilitate pattern transfer. The apparatus, system and method include a spacer that provides a spaced apart parallel and proximal orientation of lithographic elements, such as a mask and a substrate, when in mutual contact with the spacer. One or more of the mask, the substrate and the spacer is deformable, such that deformation thereof facilitates the pattern transfer.
    Type: Grant
    Filed: August 12, 2005
    Date of Patent: August 3, 2010
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Duncan R. Stewart, Wei Wu
  • Patent number: 7768628
    Abstract: A contact lithography apparatus and a method use one or both of spacers and a mesa to facilitate pattern transfer. The apparatus and the method include one or both of a spacer that provides a spaced apart orientation of lithographic elements, such as a patterning tool and a substrate, when in mutual contact with the spacer and a mesa between the patterning tool and the substrate. The mesa supports a contact surface of one or both of the mold and the substrate. One or both of the spacers and the mesa may be non-uniform. One or more of the patterning tool, the substrate and the spacer is deformable, such that deformation thereof facilitates the pattern transfer.
    Type: Grant
    Filed: October 12, 2006
    Date of Patent: August 3, 2010
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Wei Wu, Shih-Yuan Wang, Duncan R. Stewart, R. Stanley Williams, Zhaoning Yu, Inkyu Park
  • Publication number: 20100109101
    Abstract: A method of positioning a catalyst nanoparticle that facilitates nanowire growth for nanowire-based device fabrication employs a structure having a vertical sidewall formed on a substrate. The methods include forming the structure, forming a targeted region in a surface of either the structure or the substrate, and forming a catalyst nanoparticle in the targeted region using one of a variety of techniques. The techniques control the position of the catalyst nanoparticle for subsequent nanowire growth. A resonant sensor system includes a nanowire-based resonant sensor and means for accessing the nanowire. The sensor includes an electrode and a nanowire resonator. The electrode is electrically isolated from the substrate. One or more of the substrate is electrically conductive, the nanowire resonator is electrically conductive, and the sensor further comprises another electrode. The nanowire resonator responds to an environmental change by displaying a change in oscillatory behavior.
    Type: Application
    Filed: April 30, 2007
    Publication date: May 6, 2010
    Inventors: Theodore I. Kamins, Zhiyong Li, Duncan R. Stewart
  • Publication number: 20100021577
    Abstract: A contact lithography apparatus, system and method use a deformation to facilitate pattern transfer. The apparatus, system and method include a spacer that provides a spaced apart parallel and proximal orientation of lithographic elements, such as a mask and a substrate, when in mutual contact with the spacer. One or more of the mask, the substrate and the spacer is deformable, such that deformation thereof facilitates the pattern transfer.
    Type: Application
    Filed: August 12, 2005
    Publication date: January 28, 2010
    Inventors: Duncan R. Stewart, Wei Wu
  • Patent number: 7618752
    Abstract: One or more of a contact lithography module, a pattern tool and a substrate include a strain control region to prevent deformation-related misalignment.
    Type: Grant
    Filed: October 12, 2006
    Date of Patent: November 17, 2009
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Duncan R. Stewart, Robert Walmsley, Peter G. Hartwell, Wei Wu
  • Patent number: 7528948
    Abstract: An apparatus and related methods for facilitating surface-enhanced Raman spectroscopy (SERS) is described. The apparatus comprises a SERS-active structure near which a plurality of analyte molecules are disposed and an actuation device in actuable communication with the SERS-active structure to deform the SERS-active structure while the analyte molecules are disposed therenear. The deformation of the SERS-active structure varies an intensity of radiation Raman-scattered from the analyte molecules.
    Type: Grant
    Filed: July 25, 2006
    Date of Patent: May 5, 2009
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Alexandre Bratkovski, Duncan R. Stewart
  • Patent number: 7443711
    Abstract: Programmable impedance devices and methods of fabricating the devices are disclosed. The programmable impedance devices exhibit non-volatile tunable impedance properties. A programmable impedance device includes a first electrode, a second electrode and a programmable material disposed between the two electrodes. The programmable material may be disposed at a junction between the first and second electrodes.
    Type: Grant
    Filed: December 16, 2004
    Date of Patent: October 28, 2008
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Duncan R. Stewart, Patricia A. Beck, Douglas A. Ohlberg
  • Publication number: 20080237568
    Abstract: Methods of making nanometer-scale semiconductor structures with controlled size are disclosed. Semiconductor structures that include one or more nanowires are also disclosed. The nanowires can include a passivation layer or have a hollow tube structure.
    Type: Application
    Filed: April 2, 2007
    Publication date: October 2, 2008
    Inventors: Nobuhiko Kobayashi, Wei Wu, Duncan R. Stewart, Shashank Sharma, Shih-Yuan Wang, R. Stanley Williams
  • Patent number: 7388200
    Abstract: A sensing method includes exposing a nano-transducer having a controlled surface to a sample including at least one species. Adsorption of the species on the nano-transducer is transduced to a measurable signal as a function of time. Desorption of the species from the nano-transducer is also transduced to a measurable signal as a function of time. A residence time of the at least one species adsorbed on the nano-transducer is extracted from the measurable signals. The adsorption and desorption each define an individual measurable event.
    Type: Grant
    Filed: October 19, 2006
    Date of Patent: June 17, 2008
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Duncan R. Stewart, William M. Tong, R. Stanley Williams, Philip J. Kuekes, Sean Xiao-an Zhang, Kevin F. Peters, Kenneth J. Ward
  • Publication number: 20080116490
    Abstract: A sensing method includes exposing a nano-transducer having a controlled surface to a sample including at least one species. Adsorption of the species on the nano-transducer is transduced to a measurable signal as a function of time. Desorption of the species from the nano-transducer is also transduced to a measurable signal as a function of time. A residence time of the at least one species adsorbed on the nano-transducer is extracted from the measurable signals. The adsorption and desorption each define an individual measurable event.
    Type: Application
    Filed: October 19, 2006
    Publication date: May 22, 2008
    Inventors: Duncan R. Stewart, William M. Tong, R. Stanley Williams, Philip J. Kuekes, Sean Xiao-an Zhang, Kevin F. Peters, Kenneth J. Ward
  • Publication number: 20080090155
    Abstract: One or more of a contact lithography module, a pattern tool and a substrate include a strain control region to prevent deformation-related misalignment.
    Type: Application
    Filed: October 12, 2006
    Publication date: April 17, 2008
    Inventors: Duncan R. Stewart, Robert Walmsley, Peter G. Hartwell, Wei Wu
  • Publication number: 20080087636
    Abstract: A contact lithography apparatus and a method use one or both of spacers and a mesa to facilitate pattern transfer. The apparatus and the method include one or both of a spacer that provides a spaced apart orientation of lithographic elements, such as a patterning tool and a substrate, when in mutual contact with the spacer and a mesa between the patterning tool and the substrate. The mesa supports a contact surface of one or both of the mold and the substrate. One or both of the spacers and the mesa may be non-uniform. One or more of the patterning tool, the substrate and the spacer is deformable, such that deformation thereof facilitates the pattern transfer.
    Type: Application
    Filed: October 12, 2006
    Publication date: April 17, 2008
    Inventors: Wei Wu, Shih-Yuan Wang, Duncan R. Stewart, R. Stanley Williams, Zhaoning Yu, Inkyu Park
  • Publication number: 20080079104
    Abstract: A sensing device includes an optical cavity having two substantially opposed reflective surfaces. At least one nanowire is operatively disposed in the optical cavity. A plurality of metal nanoparticles is established on the at least one nanowire.
    Type: Application
    Filed: October 20, 2006
    Publication date: April 3, 2008
    Inventors: Duncan R. Stewart, Amir A. Yasseri, R. Stanley Williams, Theodore I. Kamins
  • Publication number: 20080024776
    Abstract: An apparatus and related methods for facilitating surface-enhanced Raman spectroscopy (SERS) is described. The apparatus comprises a SERS-active structure near which a plurality of analyte molecules are disposed and an actuation device in actuable communication with the SERS-active structure to deform the SERS-active structure while the analyte molecules are disposed therenear. The deformation of the SERS-active structure varies an intensity of radiation Raman-scattered from the analyte molecules.
    Type: Application
    Filed: July 25, 2006
    Publication date: January 31, 2008
    Inventors: Alexandre Bratkovski, Duncan R. Stewart