Patents by Inventor Peter Alexandrov

Peter Alexandrov 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: 11981906
    Abstract: Methods and materials for modulating low-nitrogen tolerance levels in plants are disclosed. For example, nucleic acids encoding low nitrogen tolerance-modulating polypeptides are disclosed as well as methods for using such nucleic acids to transform plant cells. Also disclosed are plants having increased[RCL2] low-nitrogen tolerance levels and plant products produced from plants having increased low-nitrogen tolerance levels.
    Type: Grant
    Filed: August 12, 2020
    Date of Patent: May 14, 2024
    Assignee: Ceres, Inc.
    Inventors: Gregory Nadzan, Richard Schneeberger, Han Suk Kim, David Van-dinh Dang, Kenneth A. Feldmann, Roger Pennell, Shing Kwok, Hongyu Zhang, Cory Christensen, Jack Okamuro, Fasong Zhou, Wuyi Wang, Emilio Margolles-Clark, Gerard Magpantay, Julissa Sosa, Nestor Apuya, Kerstin Piccolo, Bonnie Hund, Nickolai Alexandrov, Vyacheslav Brover, Peter Mascia
  • Patent number: 10396215
    Abstract: Trench JFETs may be created by etching trenches into the topside of a substrate of a first doping type to form mesas. The substrate is made up of a backside drain layer, a middle drift layer, and topside source layer. The etching goes through the source layer and partly into the drift layer. Gate regions are formed on the sides and bottoms of the trenches using doping of a second type. Vertical channel regions are formed behind the vertical gate segments via angled implantation using a doping of the first kind, providing improved threshold voltage control. Optionally the substrate may include a lightly doped channel layer between the drift and source layers, such that the mesas include a lightly doped channel region that more strongly contrasts with the implanted vertical channel regions.
    Type: Grant
    Filed: September 9, 2016
    Date of Patent: August 27, 2019
    Assignee: United Silicon Carbide, Inc.
    Inventors: Anup Bhalla, Peter Alexandrov
  • Publication number: 20160380117
    Abstract: Trench JFETs may be created by etching trenches into the topside of a substrate of a first doping type to form mesas. The substrate is made up of a backside drain layer, a middle drift layer, and topside source layer. The etching goes through the source layer and partly into the drift layer. Gate regions are formed on the sides and bottoms of the trenches using doping of a second type. Vertical channel regions are formed behind the vertical gate segments via angled implantation using a doping of the first kind, providing improved threshold voltage control. Optionally the substrate may include a lightly doped channel layer between the drift and source layers, such that the mesas include a lightly doped channel region that more strongly contrasts with the implanted vertical channel regions.
    Type: Application
    Filed: September 9, 2016
    Publication date: December 29, 2016
    Inventors: Anup Bhalla, Peter Alexandrov
  • Publication number: 20160336432
    Abstract: Trench JFETs may be created by etching trenches into the topside of a substrate of a first doping type to form mesas. The substrate is made up of a backside drain layer, a middle drift layer, and topside source layer. The etching goes through the source layer and partly into the drift layer. Gate regions are formed on the sides and bottoms of the trenches using doping of a second type. Vertical channel regions are formed behind the vertical gate segments via angled implantation using a doping of the first kind, providing improved threshold voltage control. Optionally the substrate may include a lightly doped channel layer between the drift and source layers, such that the mesas include a lightly doped channel region that more strongly contrasts with the implanted vertical channel regions.
    Type: Application
    Filed: July 28, 2016
    Publication date: November 17, 2016
    Inventors: Anup Bhalla, Peter Alexandrov
  • Publication number: 20160268446
    Abstract: Trench JFETs may be created by etching trenches into the topside of a substrate of a first doping type to form mesas. The substrate is made up of a backside drain layer, a middle drift layer, and topside source layer. The etching goes through the source layer and partly into the drift layer. Gate regions are formed on the sides and bottoms of the trenches using doping of a second type. Vertical channel regions are formed behind the vertical gate segments via angled implantation using a doping of the first kind, providing improved threshold voltage control. Optionally the substrate may include a lightly doped channel layer between the drift and source layers, such that the mesas include a lightly doped channel region that more strongly contrasts with the implanted vertical channel regions.
    Type: Application
    Filed: March 10, 2015
    Publication date: September 15, 2016
    Inventors: Anup Bhalla, Peter Alexandrov
  • Patent number: 9087911
    Abstract: A shielded junction field effect transistor (JFET) is described having gate trenches and shield trenches, the shield trenches being deeper and narrower than the gate trenches. The gate trenches may be fully aligned, partially aligned, or separated from the shield trenches.
    Type: Grant
    Filed: June 6, 2014
    Date of Patent: July 21, 2015
    Assignee: United Silicon Carbide, Inc.
    Inventors: Peter Alexandrov, Anup Bhalla
  • Publication number: 20140361349
    Abstract: A shielded junction field effect transistor (JFET) is described having gate trenches and shield trenches, the shield trenches being deeper and narrower than the gate trenches. The gate trenches may be fully aligned, partially aligned, or separated from the shield trenches.
    Type: Application
    Filed: June 6, 2014
    Publication date: December 11, 2014
    Inventors: Peter Alexandrov, Anup Bhalla
  • Patent number: 8860098
    Abstract: The present disclosure describes structures and processes to produce high voltage JFETs in wide-bandgap materials, most particularly in Silicon Carbide. The present disclosure also provides for products produced by the methods of the present disclosure and for apparatuses used to perform the methods of the present disclosure.
    Type: Grant
    Filed: March 14, 2014
    Date of Patent: October 14, 2014
    Assignee: United Silicon Carbide, Inc.
    Inventors: Anup Bhalla, Peter Alexandrov
  • Publication number: 20140264477
    Abstract: The present disclosure describes structures and processes to produce high voltage JFETs in wide-bandgap materials, most particularly in Silicon Carbide. The present disclosure also provides for products produced by the methods of the present disclosure and for apparatuses used to perform the methods of the present disclosure.
    Type: Application
    Filed: March 14, 2014
    Publication date: September 18, 2014
    Applicant: United Silicon Carbide, Inc.
    Inventors: Anup Bhalla, Peter Alexandrov