Patents by Inventor Myungho Ahn

Myungho Ahn 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).

  • Metal oxide powder for high precision polishing and method of preparation thereof
    Patent number: 7090821
    Abstract: The present invention relates to a metal oxide powder for high precision polishing and prepartion thereof, comprising aggregates formed by cohesion of primary particles, which has a cohesive degree (?) of 1.1 to 2.0 and a cohesive scale (?) of 3 to 10, the cohesive degree (?) and the cohesive scale (?) being defined by formula (I) and formula (II), respectively: ?=6/(S×?×d(XRD)) ??(I) ?=weight average particle diameter/d(XRD) ??(II) wherein, S is the specific surface area of the powder; ?, the density; and d(XRD), the particle diameter of the powder determined by X-ray diffraction analysis. In accordance with the present invention, it is possible to provide a high polishing speed and reduce scratches.
    Type: Grant
    Filed: June 5, 2003
    Date of Patent: August 15, 2006
    Assignee: Samsung Corning Co., Ltd.
    Inventors: Hyukjin Kwon, Myungho Ahn, Youngkwon Joung, Inyeon Lee
  • Metal oxide powder for high precision polishing and method of preparation thereof
    Publication number: 20030228248
    Abstract: The present invention relates to a metal oxide powder for high precision polishing and prepartion thereof, comprising aggregates formed by cohesion of primary particles, which has a cohesive degree (&agr;) of 1.1 to 2.
    Type: Application
    Filed: June 5, 2003
    Publication date: December 11, 2003
    Inventors: Hyukjin Kwon, Myungho Ahn, Youngkwon Joung, Inyeon Lee