Patents by Inventor De-Quan Yang

De-Quan Yang 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).

  • Method for producing hyperthermal hydrogen molecules and using same for selectively breaking C—H and/or Si—H bonds of molecules at or on substrate surfaces
    Patent number: 9113544
    Abstract: A method for producing hyperthermal molecular hydrogen is disclosed and use of same for selectively breaking C—H or Si—H bonds without breaking other bonds are disclosed. A hydrogen plasma is maintained and protons are extracted with an electric field to accelerate them to an appropriate kinetic energy. The protons enter into a drift zone to collide with molecular hydrogen in gas phase. The cascades of collisions produce a high flux of hyperthermal molecular hydrogen with a flux many times larger than the flux of protons extracted from the hydrogen plasma. The nominal flux ratio of hyperthermal molecular hydrogen to proton is controlled by the hydrogen pressure in the drift zone, and by the length of the drift zone. The extraction energy of the protons is shared by these hyperthermal molecules so that average energy of the hyperthermal molecular hydrogen is controlled by extraction energy of the protons and the nominal flux ratio.
    Type: Grant
    Filed: March 3, 2010
    Date of Patent: August 18, 2015
    Assignee: HL SCIENCE & TECHNOLOGY LIMITED
    Inventors: Leo W. M. Lau, De-Quan Yang, Tomas Trebicky, Heng Yong Nie
  • METHOD FOR PRODUCING HYPERTHERMAL HYDROGEN MOLECULES AND USING SAME FOR SELECTIVELY BREAKING C-H AND/OR Si-H BONDS OF MOLECULES AT OR ON SUBSTRATE SURFACES
    Publication number: 20120061558
    Abstract: A method for producing hyperthermal molecular hydrogen is disclosed and use of same for selectively breaking C—H or Si—H bonds without breaking other bonds are disclosed. A hydrogen plasma is maintained and protons are extracted with an electric field to accelerate them to an appropriate kinetic energy. The protons enter into a drift zone to collide with molecular hydrogen in gas phase. The cascades of collisions produce a high flux of hyperthermal molecular hydrogen with a flux many times larger than the flux of protons extracted from the hydrogen plasma. The nominal flux ratio of hyperthermal molecular hydrogen to proton is controlled by the hydrogen pressure in the drift zone, and by the length of the drift zone. The extraction energy of the protons is shared by these hyperthermal molecules so that average energy of the hyperthermal molecular hydrogen is controlled by extraction energy of the protons and the nominal flux ratio.
    Type: Application
    Filed: March 3, 2010
    Publication date: March 15, 2012
    Applicant: THE UNIVERSITY OF WESTERN ONTARIO
    Inventors: Leo W.M. Lau, De-Quan Yang, Tomas Trebicky, Heng Yong Nie