Patents by Inventor Phani Konkapaka

Phani Konkapaka 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).

  • GaN bulk growth by Ga vapor transport
    Patent number: 7867335
    Abstract: GaN is grown by creating a Ga vapor from a powder, and using an inert purge gas from a source to transport the vapor to a growth site where the GaN growth takes place. In one embodiment, the inert gas is N2, and the powder source is GaN powder that is loaded into source chambers. The GaN powder is congruently evaporated into Ga and N2 vapors at temperatures between approximately 1000 and 1200° C. The formation of Ga liquid in the powder is suppressed by the purging of an inert gas through the powder. The poser may also be isolated from a nitride containing gas provided at the growth cite. In one embodiment, the inert gas is flowed through the powder.
    Type: Grant
    Filed: October 2, 2006
    Date of Patent: January 11, 2011
    Assignee: Cornell Research Foundation, Inc.
    Inventors: Michael G. Spencer, Phani Konkapaka, Huaqiang Wu, Yuri Makarov
  • GaN bulk growth by Ga vapor transport
    Publication number: 20070178671
    Abstract: GaN is grown by creating a Ga vapor from a powder, and using an inert purge gas from a source to transport the vapor to a growth site where the GaN growth takes place. In one embodiment, the inert gas is N2, and the powder source is GaN powder that is loaded into source chambers. The GaN powder is congruently evaporated into Ga and N2 vapors at temperatures between approximately 1000 and 1200° C. The formation of Ga liquid in the powder is suppressed by the purging of an inert gas through the powder. The poser may also be isolated from a nitride containing gas provided at the growth cite. In one embodiment, the inert gas is flowed through the powder.
    Type: Application
    Filed: October 2, 2006
    Publication date: August 2, 2007
    Applicant: CORNELL RESEARCH FOUNDATION, INC
    Inventors: Michael Spencer, Phani Konkapaka, Huaqiang Wu, Yuri Makarov