Patents by Inventor Derek Dumas

Derek Dumas 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: 12140707
    Abstract: A single photon avalanche diode (SPAD) device is presented. The SPAD device comprising: a Si-based avalanche layer formed over an n-type semiconductor contact layer; a p-type charge sheet layer formed in or on the avalanche layer, the p-type charge sheet layer having an in-plane width; a Ge-based absorber layer, formed over the charge sheet layer and/or the avalanche layer, and overlapping the charge sheet layer, the Ge-based absorber layer having an in-plane width; wherein, at least in one in-plane direction, the in-plane width of the Ge-based absorber layer is greater than the in-plane width of the p-type charge sheet layer.
    Type: Grant
    Filed: September 9, 2019
    Date of Patent: November 12, 2024
    Assignees: The University Court of the University of Glasgow, Heriot-Watt University
    Inventors: Douglas John Paul, Derek Dumas, Jaroslaw Kirdoda, Ross W. Millar, Muhammad M. Mirza, Gerald S. Buller, Peter Vines, Kateryna Kuzmenko
  • Publication number: 20220050184
    Abstract: A single photon avalanche diode (SPAD) device is presented. The SPAD device comprising: a Si-based avalanche layer formed over an n-type semiconductor contact layer; a p-type charge sheet layer formed in or on the avalanche layer, the p-type charge sheet layer having an in-plane width; a Ge-based absorber layer, formed over the charge sheet layer and/or the avalanche layer, and overlapping the charge sheet layer, the Ge-based absorber layer having an in-plane width; wherein, at least in one in-plane direction, the in-plane width of the Ge-based absorber layer is greater than the in-plane width of the p-type charge sheet layer.
    Type: Application
    Filed: September 9, 2019
    Publication date: February 17, 2022
    Inventors: Douglas John Paul, Derek Dumas, Jaroslaw Kirdoda, Ross W. Millar, Muhammad M. Mirza, Gerald S. Buller, Peter Vines, Kateryna Kuzmenko