Patents by Inventor Don Willis

Don Willis 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: 9536803
    Abstract: An integrated power module having a depletion mode device and an enhancement mode device that is configured to prevent an accidental on-state condition for the depletion mode device during a gate signal loss is disclosed. In particular, the disclosed integrated power module is structured to provide improved isolation and thermal conductivity. The structure includes a substrate having a bottom drain pad for the depletion mode device disposed on the substrate and an enhancement mode device footprint-sized cavity that extends through the substrate to the bottom drain pad. A thermally conductive and electrically insulating slug substantially fills the cavity to provide a higher efficient thermal path between the enhancement mode device and the bottom drain pad for the depletion mode device.
    Type: Grant
    Filed: September 8, 2015
    Date of Patent: January 3, 2017
    Assignee: Qorvo US, Inc.
    Inventors: David Charles Sheridan, Robert Charles Dry, Don Willis
  • Publication number: 20160071781
    Abstract: An integrated power module having a depletion mode device and an enhancement mode device that is configured to prevent an accidental on-state condition for the depletion mode device during a gate signal loss is disclosed. In particular, the disclosed integrated power module is structured to provide improved isolation and thermal conductivity. The structure includes a substrate having a bottom drain pad for the depletion mode device disposed on the substrate and an enhancement mode device footprint-sized cavity that extends through the substrate to the bottom drain pad. A thermally conductive and electrically insulating slug substantially fills the cavity to provide a higher efficient thermal path between the enhancement mode device and the bottom drain pad for the depletion mode device.
    Type: Application
    Filed: September 8, 2015
    Publication date: March 10, 2016
    Inventors: David Charles Sheridan, Robert Charles Dry, Don Willis
  • Patent number: 9214337
    Abstract: A semiconductor device and methods for manufacturing the same are disclosed. The semiconductor device includes a semiconductor stack structure attached to a wafer handle having at least one aperture that extends through the wafer handle to an exposed portion of the semiconductor stack structure. A thermally conductive and electrically resistive polymer substantially fills the at least one aperture and contacts the exposed portion of the semiconductor stack structure. One method for manufacturing the semiconductor device includes forming patterned apertures in the wafer handle to expose a portion of the semiconductor stack structure. The patterned apertures may or may not be aligned with sections of RF circuitry making up the semiconductor stack structure. A following step includes contacting the exposed portion of the semiconductor stack structure with a polymer and substantially filling the patterned apertures with the polymer, wherein the polymer is thermally conductive and electrically resistive.
    Type: Grant
    Filed: April 24, 2014
    Date of Patent: December 15, 2015
    Assignee: RF Micro Devices, Inc.
    Inventors: Michael Carroll, Julio Costa, Daniel Charles Kerr, Don Willis, Elizabeth Glass
  • Patent number: 9184049
    Abstract: A semiconductor device and methods for manufacturing the same are disclosed. The semiconductor device includes a semiconductor stack structure attached to a wafer handle having at least one aperture that extends through the wafer handle to an exposed portion of the semiconductor stack structure. A thermally conductive and electrically resistive polymer substantially fills the at least one aperture and contacts the exposed portion of the semiconductor stack structure. One method for manufacturing the semiconductor device includes forming patterned apertures in the wafer handle to expose a portion of the semiconductor stack structure. The patterned apertures may or may not be aligned with sections of RF circuitry making up the semiconductor stack structure. A following step includes contacting the exposed portion of the semiconductor stack structure with a polymer and substantially filling the patterned apertures with the polymer, wherein the polymer is thermally conductive and electrically resistive.
    Type: Grant
    Filed: April 24, 2014
    Date of Patent: November 10, 2015
    Assignee: RF Micro Devices, Inc.
    Inventors: Michael Carroll, Julio Costa, Daniel Charles Kerr, Don Willis, Elizabeth Glass
  • Publication number: 20140306324
    Abstract: A semiconductor device and methods for manufacturing the same are disclosed. The semiconductor device includes a semiconductor stack structure having a first surface and a second surface. A polymer substrate having a high thermal conductivity and a high electrical resistivity is disposed onto the first surface of the semiconductor stack structure. One method includes providing the semiconductor stack structure with the first surface in direct contact with a wafer handle. A next step involves removing the wafer handle to expose the first surface of the semiconductor stack structure. A following step includes disposing a polymer substrate having high thermal conductivity and high electrical resistivity directly onto the first surface of the semiconductor stack structure.
    Type: Application
    Filed: June 26, 2014
    Publication date: October 16, 2014
    Inventors: Julio Costa, Michael Carroll, Daniel Charles Kerr, Don Willis, Elizabeth Glass
  • Publication number: 20140252566
    Abstract: A semiconductor device and methods for manufacturing the same are disclosed. The semiconductor device includes a semiconductor stack structure having a first surface and a second surface. A first polymer having a high thermal conductivity and a high electrical resistivity is disposed on the first surface of the semiconductor stack structure. An exemplary method includes providing the semiconductor stack structure with the second surface in direct contact with a wafer handle. A next step involves removing the wafer handle to expose the second surface of the semiconductor stack structure. A following step includes disposing a second polymer having high thermal conductivity and high electrical resistivity directly onto the second surface of the semiconductor stack structure. Additional methods apply silicon nitride layers on the first surface and second surface of the semiconductor stack structure before disposing the first polymer and second polymer to realize the semiconductor device.
    Type: Application
    Filed: April 24, 2014
    Publication date: September 11, 2014
    Applicant: RF Micro Devices, Inc.
    Inventors: Daniel Charles Kerr, Julio Costa, Michael Carroll, Don Willis, Elizabeth Glass
  • Publication number: 20140252567
    Abstract: A semiconductor device and methods for manufacturing the same are disclosed. The semiconductor device includes a semiconductor stack structure attached to a wafer handle having at least one aperture that extends through the wafer handle to an exposed portion of the semiconductor stack structure. A thermally conductive and electrically resistive polymer substantially fills the at least one aperture and contacts the exposed portion of the semiconductor stack structure. One method for manufacturing the semiconductor device includes forming patterned apertures in the wafer handle to expose a portion of the semiconductor stack structure. The patterned apertures may or may not be aligned with sections of RF circuitry making up the semiconductor stack structure. A following step includes contacting the exposed portion of the semiconductor stack structure with a polymer and substantially filling the patterned apertures with the polymer, wherein the polymer is thermally conductive and electrically resistive.
    Type: Application
    Filed: April 24, 2014
    Publication date: September 11, 2014
    Applicant: RF Micro Devices, Inc.
    Inventors: Michael Carroll, Julio Costa, Daniel Charles Kerr, Don Willis, Elizabeth Glass
  • Publication number: 20110238589
    Abstract: An efficient and scalable system for identifying a commodity having a specific, unique topocompositional profile has been developed that includes: enrolling at least one commodity in order to capture its topocompositional profile; matching the at least one commodity with a plurality of commodities in a commodity database; and integrating the topocompositional profile into a commodity grading system. A method of identifying a commodity having a specific, unique topocompositional profile, includes enrolling at least one commodity in order to capture its topocompositional profile; matching the at least one commodity with a plurality of commodities in a commodity database; and integrating the topocompositional profile into a commodity grading system.
    Type: Application
    Filed: March 25, 2010
    Publication date: September 29, 2011
    Inventors: Don Willis, James Freeman, David Rosenberg
  • Patent number: 4222597
    Abstract: A hollow cylindrical scoop-shaped device facilitates scooping of solid and semi-solid refuse off hard ground or vegetation covered ground through manipulation of the device by a pivotally attached handle attached forwardly of the center of gravity of the device. The refuse scooped is collected in a detachably attached trailing disposable clamp secured conventional paper sack or plastic bag protected by a guard at the bottom of the device. The handle includes a detachably attached paddle for manual use in sweeping the refuse off sidewalks and the like into the scoop.
    Type: Grant
    Filed: January 5, 1979
    Date of Patent: September 16, 1980
    Inventor: J. Don Willis
  • Patent number: 4202212
    Abstract: Device for sampling air in proportion to respiration, particularly the collection of air pollutants in proportion to the actual respiration of the wearer. The device includes a pump supported adjacent the thoracic cavity and activated by the expansion and contraction of the thoracic cavity during respiration, so as to draw air through an air sampling monitor.
    Type: Grant
    Filed: May 1, 1978
    Date of Patent: May 13, 1980
    Assignee: Geomet, Incorporated
    Inventors: Richard T. Allen, Rudolph H. Moyer, Donald J. Sibbett, Howard H. Anderson, Glen R. Martner, Don Willis
  • Patent number: 4187859
    Abstract: Method for sampling air in proportion to respiration, particularly the collection of air pollutants in proportion to the actual respiration of the wearer. The method is characterized by its use of a pump supported adjacent the thoracic cavity and activated by the expansion and contraction of the thoracic cavity during respiration, so as to draw air through an air sampling monitor.
    Type: Grant
    Filed: May 1, 1978
    Date of Patent: February 12, 1980
    Assignee: Geomet, Inc.
    Inventors: Richard T. Allen, Rudolph H. Moyer, Donald J. Sibbett, Howard H. Anderson, Glen R. Martner, Don Willis
  • Patent number: 4187836
    Abstract: Device for sampling air in proportion to respiration, particularly the collection of air pollutants in proportion to the actual respiration of the wearer. The pump is supported adjacent the thoracic cavity by means of a harness and is activated by the expansion and contraction of the thoracic cavity during respiration, so as to draw air through an air sampling monitor.
    Type: Grant
    Filed: May 1, 1978
    Date of Patent: February 12, 1980
    Assignee: Geomet, Inc.
    Inventors: Richard T. Allen, Rudolph H. Moyer, Donald J. Sibbett, Howard H. Anderson, Glen R. Martner, Don Willis
  • Patent number: 4183247
    Abstract: Method for sampling air in proportion to respiration, particularly the collection of air pollutants in proportion to the actual respiration of the wearer. The method is characterized by its use of a pump supported adjacent the thoracic cavity and activated by the expansion and contraction of the thoracic cavity during respiration, so as to draw air through an air sampling monitor.
    Type: Grant
    Filed: May 1, 1978
    Date of Patent: January 15, 1980
    Assignee: Geomet, Incorporated
    Inventors: Richard T. Allen, Rudolph H. Moyer, Donald J. Sibbett, Howard H. Anderson, Glen R. Martner, Don Willis
  • Patent number: 4149745
    Abstract: A hollow cylindrical scoop-shaped device facilitates scooping of solid and semi-solid refuse off hard ground or vegetation covered ground through manipulation of the device by a directly attached handle or by an extended handle. The refuse scooped is collected in a detachably attached trailing disposable conventional paper sack. A clamp secures any sized opening paper sack and a guard about the bottom of the device receives the lower edge of the sack to prevent tearing and/or wetting thereof during use of the device.
    Type: Grant
    Filed: March 1, 1978
    Date of Patent: April 17, 1979
    Inventor: J. Don Willis
  • Patent number: D285012
    Type: Grant
    Filed: August 29, 1983
    Date of Patent: August 5, 1986
    Inventor: J. Don Willis