Patents by Inventor Yonggan Ai

Yonggan Ai 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).

  • Microwave plasma chemical vapor deposition device and application thereof
    Patent number: 11469077
    Abstract: A microwave plasma chemical vapor deposition device for diamond synthesis. A microwave source generates a microwave signal, and a resonant cavity receives a plurality of process gases. The microwave signal is spread in a first mode at a first waveguide. A mode conversion antenna converts the first mode of the microwave signal into a second mode that is spread at a second waveguide. A coupling conversion cavity receives and transmits the microwave signal in the second mode to the mode conversion antenna thereby converting the second mode of the microwave signal into a third mode. A medium viewport receives the microwave signal in the third mode and transmits to the resonant cavity which enables the microwave signal to excite and discharge the process gases to form spherical plasma, carbon containing groups and atomic hydrogen thereby depositing a diamond film on a seed.
    Type: Grant
    Filed: April 22, 2019
    Date of Patent: October 11, 2022
    Assignee: FD3M, Inc.
    Inventors: Yi Ma, Matthew L. Scullin, Jinhua Zhu, Jianxin Wu, Yong Miao, Di Lu, Yonggan Ai, Christopher E. Griffin
  • MICROWAVE PLASMA CHEMICAL VAPOR DEPOSITION DEVICE AND APPLICATION THEREOF
    Publication number: 20190326097
    Abstract: A microwave plasma chemical vapor deposition device for diamond synthesis. A microwave source generates a microwave signal, and a resonant cavity receives a plurality of process gases. The microwave signal is spread in a first mode at a first waveguide. A mode conversion antenna converts the first mode of the microwave signal into a second mode that is spread at a second waveguide. A coupling conversion cavity receives and transmits the microwave signal in the second mode to the mode conversion antenna thereby converting the second mode of the microwave signal into a third mode. A medium viewport receives the microwave signal in the third mode and transmits to the resonant cavity which enables the microwave signal to excite and discharge the process gases to form spherical plasma, carbon containing groups and atomic hydrogen thereby depositing a diamond film on a seed.
    Type: Application
    Filed: April 22, 2019
    Publication date: October 24, 2019
    Inventors: Yi Ma, Matthew L. Scullin, Jinhua Zhu, Jianxin Wu, Yong Miao, Di Lu, Yonggan Ai, Christopher E. Griffin