Patents by Inventor Hyon-Jong Cho

Hyon-Jong Cho 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).

  • Publication number: 20020046694
    Abstract: The present invention relates to a single crystalline silicon ingot, a single crystalline wafer, and a producing method thereof in accordance with the Czochralski method which enables reduction of a large defect area while increasing a micro-vacancy defect area in an agglomerated vacancy point area, which is the area between a central axis and an oxidation-induced stacking fault ring, by providing uniform conditions of crystal ingot growth and cooling and by adjusting a pulling rate for growing an ingot to grow, thus the oxidation-induced stacking fault ring exists only at an edge of the ingot radius.
    Type: Application
    Filed: December 22, 2000
    Publication date: April 25, 2002
    Inventors: Hong-Woo Lee, Joon-Young Choi, Hyon-Jong Cho, Hak-Do Yoo