Patents by Inventor Randy L. Hoffman

Randy L. Hoffman 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: 20080254569
    Abstract: One exemplary embodiment includes a semiconductor device. The semiconductor device can include a channel including one or more of a metal oxide including zinc-gallium, cadmium-gallium, cadmium-indium.
    Type: Application
    Filed: October 11, 2007
    Publication date: October 16, 2008
    Inventors: Randy L. Hoffman, Gregory S. Herman, Peter P. Mardilovich
  • Patent number: 7339187
    Abstract: Enhancement mode, field effect transistors wherein at least a portion of the transistor structure may be substantially transparent. One variant of the transistor includes a channel layer comprising a substantially insulating, substantially transparent, material selected from ZnO, SnO2, or In2O3. A gate insulator layer comprising a substantially transparent material is located adjacent to the channel layer so as to define a channel layer/gate insulator layer interface. A second variant of the transistor includes a channel layer comprising a substantially transparent material selected from substantially insulating ZnO, SnO2 or In2O3, the substantially insulating ZnO, SnO2, or In2O3 being produced by annealing. Devices that include the transistors and methods for making the transistors are also disclosed.
    Type: Grant
    Filed: January 24, 2003
    Date of Patent: March 4, 2008
    Assignee: State of Oregon acting by and through the Oregon State Board of Higher Education on behalf of Oregon State University
    Inventors: John F. Wager, III, Randy L. Hoffman
  • Patent number: 7297977
    Abstract: One exemplary embodiment includes a semiconductor device. The semiconductor device comprising a channel including one or more of a metal oxide including zinc-gallium, cadmium-gallium, cadmium-indium.
    Type: Grant
    Filed: March 12, 2004
    Date of Patent: November 20, 2007
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Randy L. Hoffman, Gregory S. Herman, Peter P. Mardilovich
  • Patent number: 7282782
    Abstract: A semiconductor device can include a channel including a first binary oxide and a second binary oxide.
    Type: Grant
    Filed: March 12, 2004
    Date of Patent: October 16, 2007
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Randy L. Hoffman, Peter P. Mardilovich, Gregory S. Herman
  • Patent number: 7250627
    Abstract: A semiconductor device can include a channel including a gallium oxide film.
    Type: Grant
    Filed: March 12, 2004
    Date of Patent: July 31, 2007
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventor: Randy L. Hoffman
  • Patent number: 7242039
    Abstract: One exemplary embodiment includes a semi-conductor device. The semi-conductor device can include a channel including that includes one or more compounds of the formula AxBxCxOx wherein each A is selected from the group of Zn, Cd, each B is selected from the group of Ga, In, each C is selected from the group Ge, Sn, Pb, each O is atomic oxygen, each x is independently a non-zero integer, and each of A, B, and C are different.
    Type: Grant
    Filed: March 12, 2004
    Date of Patent: July 10, 2007
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Randy L. Hoffman, Gregory S. Herman, Peter P. Mardilovich
  • Patent number: 7189992
    Abstract: Enhancement mode, field effect transistors wherein at least a portion of the transistor structure may be substantially transparent. One variant of the transistor includes a channel layer comprising a substantially insulating, substantially transparent, material selected from ZnO or SnO2. A gate insulator layer comprising a substantially transparent material is located adjacent to the channel layer so as to define a channel layer/gate insulator layer interface. A second variant of the transistor includes a channel layer comprising a substantially transparent material selected from substantially insulating ZnO or SnO2, the substantially insulating ZnO or SnO2 being produced by annealing. Devices that include the transistors and methods for making the transistors are also disclosed.
    Type: Grant
    Filed: November 27, 2002
    Date of Patent: March 13, 2007
    Assignee: State of Oregon acting by and through the Oregon State Board of Higher Education on behalf of Oregon State University
    Inventors: John F. Wager, III, Randy L. Hoffman
  • Patent number: 7145174
    Abstract: A semiconductor device can include a channel including a zinc-indium oxide film.
    Type: Grant
    Filed: March 12, 2004
    Date of Patent: December 5, 2006
    Assignees: Hewlett-Packard Development Company, LP., Oregon State University
    Inventors: Hai Q. Chiang, Randy L. Hoffman, David Hong, Nicole L. Dehuff, John F. Wager
  • Publication number: 20030218221
    Abstract: Enhancement mode, field effect transistors wherein at least a portion of the transistor structure may be substantially transparent. One variant of the transistor includes a channel layer comprising a substantially insulating, substantially transparent, material selected from ZnO or SnO2. A gate insulator layer comprising a substantially transparent material is located adjacent to the channel layer so as to define a channel layer/gate insulator layer interface. A second variant of the transistor includes a channel layer comprising a substantially transparent material selected from substantially insulating ZnO or SnO2, the substantially insulating ZnO or SnO2 being produced by annealing. Devices that include the transistors and methods for making the transistors are also disclosed.
    Type: Application
    Filed: November 27, 2002
    Publication date: November 27, 2003
    Inventors: John F. Wager, Randy L. Hoffman
  • Publication number: 20030218222
    Abstract: Enhancement mode, field effect transistors wherein at least a portion of the transistor structure may be substantially transparent. One variant of the transistor includes a channel layer comprising a substantially insulating, substantially transparent, material selected from ZnO, SnO2, or In2O3. A gate insulator layer comprising a substantially transparent material is located adjacent to the channel layer so as to define a channel layer/gate insulator layer interface. A second variant of the transistor includes a channel layer comprising a substantially transparent material selected from substantially insulating ZnO, SnO2 or In2O3, the substantially insulating ZnO, SnO2, or In2O3 being produced by annealing. Devices that include the transistors and methods for making the transistors are also disclosed.
    Type: Application
    Filed: January 24, 2003
    Publication date: November 27, 2003
    Applicants: The State of Oregon acting and through the oregon State Board of Higher Education on behalf of, Oregon State University
    Inventors: John F. Wager, Randy L. Hoffman