Patents by Inventor Du-Chul Oh

Du-Chul Oh 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).

  • Contact structure and manufacturing method thereof
    Patent number: 8728889
    Abstract: A semiconductor memory device includes conductive patterns vertically stacked on the substrate and having pad regions extended further at edge portions of the conductive patterns as the conductive patterns descend from an uppermost conductive pattern to a lowermost conductive pattern, a first contact plug disposed on a first pad region of the lowermost conductive pattern, a buffer conductive pattern disposed on a second pad region positioned above the first pad region, and a second contact plug formed on the buffer conductive pattern.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: May 20, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Ho-Ki Lee, Gwang-Hyun Baek, Du-Chul Oh, Jin-Kwan Lee, Ki-Jeong Kim
  • CONTACT STRUCTURE AND MANUFACTURING METHOD THEREOF
    Publication number: 20130270714
    Abstract: A semiconductor memory device includes conductive patterns vertically stacked on the substrate and having pad regions extended further at edge portions of the conductive patterns as the conductive patterns descend from an uppermost conductive pattern to a lowermost conductive pattern, a first contact plug disposed on a first pad region of the lowermost conductive pattern, a buffer conductive pattern disposed on a second pad region positioned above the first pad region, and a second contact plug formed on the buffer conductive pattern.
    Type: Application
    Filed: March 14, 2013
    Publication date: October 17, 2013
    Inventors: Ho-Ki Lee, Gwang-Hyun Baek, Du-Chul Oh, Jin-Kwan Lee, Ki-Jeong Kim