Patents by Inventor Seok J. Yoon

Seok J. Yoon 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).

  • Compositions of high frequency dielectrics
    Patent number: 5569632
    Abstract: The present invention provides compositions of high frequency dielectric ceramics represented by the following formula:(1-y) SrTiO.sub.3 -y La(Zn.sub.1-x)/2 Mg.sub.x/2 Ti.sub.1/2)O.sub.3wherein 0.ltoreq.x.ltoreq.0.99; and 0.4.ltoreq.y.ltoreq.0.9. The compositions have a dielectric constant of about 28 to about 60, Qxf.sub.0 (GHz) of about 25,000 to about 71,000 and a temperature coefficient of the resonant frequency of about -56 to about 84 ppm/.degree. C. The compositions may be applied to various communications systems which require high frequency dielectric ceramics.
    Type: Grant
    Filed: June 9, 1995
    Date of Patent: October 29, 1996
    Assignee: Korea Institute of Science and Technology
    Inventors: Hyung J. Jung, Hyun J. Kim, Kyong Y. Kim, Seok J. Yoon, Sang O. Yoon, Tetsuro Nakamura, Mitsuru Itoh, Yoshiyouki Inaguma