Patents by Inventor Igor Bul

Igor Bul 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).

  • Trench fill process
    Patent number: 6812525
    Abstract: A process for insulating the interior of the trenches of trench type MOSgated devices in which a capping oxide is formed over the top of the trenches to span approximately a 3 micron gap and then reflowing the oxide at 1050° C. in pure O2 to flush air out of the trenches and leaving an at least partially evacuated sealed volume in each of the trenches.
    Type: Grant
    Filed: June 18, 2003
    Date of Patent: November 2, 2004
    Assignee: International Rectifier Corporation
    Inventors: Igor Bul, Srikant Sridevan
  • Trench fill process
    Publication number: 20030234423
    Abstract: A process for insulating the interior of the trenches of trench type MOSgated devices in which a capping oxide is formed over the top of the trenches to span approximately a 3 micron gap and then reflowing the oxide at 1050° C. in pure O2 to flush air out of the trenches and leaving an at least partially evacuated sealed volume in each of the trenches.
    Type: Application
    Filed: June 18, 2003
    Publication date: December 25, 2003
    Applicant: International Rectifier Corporation
    Inventors: Igor Bul, Srikant Sridevan