Patents by Inventor Tae Suk Chung

Tae Suk Chung 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 dielectric composition and method for preparing the same
    Patent number: 6028021
    Abstract: A microwave dielectric composition superior in all dielectric constant, product of resonant frequency by quality coefficient and temperature-dependent coefficient of resonant frequency, can be prepared by mixing a main oxide formulation consisting of lead oxide, calcium oxide, zirconium oxide and tin oxide with manganous nitrate (Mn(NO.sub.3).sub.2.4H.sub.2 O), calcining the mixture at a temperature of about 1,000 to 1,200.degree. C., pulverizing and molding the mixture, and sintering the molded body at a temperature of about 1,200 to 1,550.degree. C. in an oxygen atmosphere. It is 100 or greater in dielectric constant, 4,000 or greater in the product of resonant frequency by quality coefficient and .+-.3 mmp/.degree. C. or less in temperature-dependent coefficient of resonant frequency.
    Type: Grant
    Filed: June 30, 1998
    Date of Patent: February 22, 2000
    Assignee: Korea Advanced Institute of Science and Technology
    Inventors: Ho Gi Kim, Yung Park, Tae Suk Chung