Patents by Inventor Myeong-kwon Gu

Myeong-kwon Gu 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).

  • Resonator, apparatus having the same and fabrication method of resonator
    Patent number: 7554426
    Abstract: A resonator includes a substrate, and a resonating unit formed on the substrate, and having a lower electrode, a piezoelectric film, and an upper electrode. The lower electrode is formed of at least two layers to adjust a piezoelectric coupling coefficient. The lower electrode includes a first electrode layer and a second electrode layer, which have crystallographic characteristics, particularly, grain sizes or surface roughnesses Ra, different from each other, respectively. The first and the second electrode layers are formed to have a predetermined thickness ratio to each other.
    Type: Grant
    Filed: February 2, 2007
    Date of Patent: June 30, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Joo-ho Lee, Hae-seok Park, Myeong-kwon Gu, Jae-shik Shin, In-sang Song, Kwang-jae Shin
  • Resonator, apparatus having the same and fabrication method of resonator
    Publication number: 20080061907
    Abstract: A resonator includes a substrate, and a resonating unit formed on the substrate, and having a lower electrode, a piezoelectric film, and an upper electrode. The lower electrode is formed of at least two layers to adjust a piezoelectric coupling coefficient. The lower electrode includes a first electrode layer and a second electrode layer, which have crystallographic characteristics, particularly, grain sizes or surface roughnesses Ra, different from each other, respectively. The first and the second electrode layers are formed to have a predetermined thickness ratio to each other.
    Type: Application
    Filed: February 2, 2007
    Publication date: March 13, 2008
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Joo-ho Lee, Hae-seok Park, Myeong-kwon Gu, Jae-shik Shin, In-sang Song, Kwang-jae Shin