Patents by Inventor Myoung-Hui Choi

Myoung-Hui 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).

  • Patent number: 7069639
    Abstract: A method of fabricating a chip type power inductor includes the steps of: preparing green sheets: forming cutting lines on a magnetic layer green sheet and a non-magnetic layer green sheet; forming via holes on the non-magnetic layer green sheet where the cutting lines are formed, and forming an electrode pattern at an upper surface of the non-magnetic layer green sheet; stacking a plurality of layers by constituting the magnetic layer and the non-magnetic layer where via holes and electrode patterns are formed as one unit in a state that a non-magnetic layer where cutting lines and electrode patterns are not formed is inserted; stacking a cover layer composed of a magnetic layer at upper and lower surfaces of the stacked layers; firing the stacked body; and forming external electrodes at an outer surface of the fired stack body.
    Type: Grant
    Filed: November 25, 2003
    Date of Patent: July 4, 2006
    Assignee: Ceratech Corporation
    Inventors: Myoung-Hui Choi, Soon-Gyu Hong, Sang-Eun Jang
  • Patent number: 6917274
    Abstract: A stacked coil device comprising: an inner electrode layer formed of at least two parts and having a non-magnetic electrode region and an inner magnetic region formed as one layer, the non-magnetic electrode region being provided with an opening at a center thereof and provided with an electrode pattern on at least one surface of an upper surface and a lower surface thereof and the inner magnetic region positioned at the center opening and a lateral surface of the non-magnetic electrode region; a cover layer in contact with both surfaces of the inner electrode layer; and an external electrode terminal electrically connected to the electrode pattern.
    Type: Grant
    Filed: October 1, 2003
    Date of Patent: July 12, 2005
    Assignee: Ceratech Corporation
    Inventors: Soon-Gyu Hong, Myoung-Hui Choi, Sang-Eun Jang
  • Publication number: 20040108934
    Abstract: A chip type power inductor comprising: a stack body where a magnetic substance which forms a magnetic core stacked with a plurality of layers and non-magnetic layers inserted to inside of the magnetic substance which forms a magnetic core are formed as one unit; coil patterns formed on either upper surfaces or lower surfaces of the plurality of layers of the magnetic substance which forms a magnetic core; and via holes formed at the plurality of layers constituting the magnetic substance which forms a magnetic core in order to electrically connect the coil patterns.
    Type: Application
    Filed: November 25, 2003
    Publication date: June 10, 2004
    Applicant: Ceratech Corporation
    Inventors: Myoung-Hui Choi, Soon-Gyu Hong, Sang-Eun Jang
  • Publication number: 20040061587
    Abstract: A stacked coil device comprising: an inner electrode layer formed of at least two layers and having a non-magnetic electrode layer and an inner magnetic layer as one unit, the non-magnetic electrode layer provided with an opening at a center thereof and provided with an electrode pattern on at least one surface of an upper surface and a lower surface thereof and the inner magnetic layer positioned at the center opening and a lateral surface of the non-magnetic electrode layer; a cover layer in contact with both surfaces of the inner electrode layer; and an external electrode terminal partially and electrically connected to the electrode pattern.
    Type: Application
    Filed: October 1, 2003
    Publication date: April 1, 2004
    Applicant: Ceratech Corporation
    Inventors: Soon-Gyu Hong, Myoung-Hui Choi, Sang-Eun Jang