Patents by Inventor III-Soo Choi

III-Soo Choi 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: 20070022943
    Abstract: A silicon single crystal ingot growing apparatus for growing a silicon single crystal ingot based on a Czochralski method The silicon single crystal ingot growing apparatus includes a chamber; a crucible provided in the chamber, and for containing a silicon melt; a heater provided at the outside of the crucible and for heating the silicon melt; a pulling unit for ascending a silicon single crystal grown from the silicon melt; and a plurality of magnetic members provided at the outside of the chamber and for asymmetrically applying a magnetic field to the silicon melt Such a structure can uniformly controls an oxygen concentration at a rear portion of a silicon single crystal ingot using asymmetric upper/lower magnetic fields without replacing a hot zone In addition, such a structure can controls a flower phenomenon generated on the growth of the single crystal by the asymmetric magnetic fields without a loss such as the additional hot zone (H/Z) replacement, P/S down, and SR variance.
    Type: Application
    Filed: July 27, 2006
    Publication date: February 1, 2007
    Applicant: Siltron Inc.
    Inventors: Young Ho Hong, Man Kwak, III-Soo Choi, Hyon-Jong Cho, Hong Lee