Patents by Inventor Jong-gul Yoon

Jong-gul 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).

  • Patent number: 9105345
    Abstract: The present invention relates to a ferroelectric memory device having a multilevel polarization (MLP) state generated due to adjustment of a displacement current and to a method for manufacturing the ferroelectric memory device.
    Type: Grant
    Filed: August 31, 2012
    Date of Patent: August 11, 2015
    Assignee: Seoul National University R&DB Foundation
    Inventors: Tae Won Noh, Daesu Lee, Jong-Gul Yoon
  • Publication number: 20140233296
    Abstract: The present application relates to a ferroelectric memory device having a multilevel polarization (MLP) state generated due to adjustment of a displacement current and to a method for manufacturing the ferroelectric memory device.
    Type: Application
    Filed: August 31, 2012
    Publication date: August 21, 2014
    Applicant: SEOUL NATIONAL UNIVERSITY R%DB FOUNDATION
    Inventors: Tae Won Noh, Daesu Lee, Jong-Gul Yoon
  • Patent number: 8231979
    Abstract: The present invention relates to forming the material represented by the following formula (1) into a layer having hexagonal crystalline structure, which is different from the orthorhombic crystalline structure of the material in bulk phase, so that the material can be used more effectively in various fields requiring multiferroic properties by obtaining multiferroic properties enhanced than the conventional multiferroic materials. RMnO3, (R=Lanthanide) . . .
    Type: Grant
    Filed: February 16, 2007
    Date of Patent: July 31, 2012
    Assignee: Seoul National University R & DB Foundation
    Inventors: Tae Won Noh, Jong Gul Yoon, Jung Hyuk Lee
  • Publication number: 20090246543
    Abstract: The present invention relates to forming the material represented by the following formula (1) into a layer having hexagonal crystalline structure, which is different from the orthorhombic crystalline structure of the material in bulk phase, so that the material can be used more effectively in various fields requiring multiferroic properties by obtaining multiferroic properties enhanced than the conventional multiferroic materials. RMnO3, (R=Lanthanide) . . .
    Type: Application
    Filed: February 16, 2007
    Publication date: October 1, 2009
    Applicant: SEOUL NATIONAL UNIVERSITY INDUSTRY FOUNDATION
    Inventors: Tae Won Noh, Jong Gul Yoon, Jung Hyuk Lee
  • Patent number: 7148530
    Abstract: A ferroelectric capacitor and a method for manufacturing the same includes a lower electrode, a dielectric layer, and an upper electrode layer, which are sequentially stacked, wherein the dielectric layer has a multi-layer structure including a plurality of sequentially stacked ferroelectric films, and wherein two adjacent ferroelectric films have either different compositions or different composition ratios. Use of a ferroelectric capacitor according to an embodiment of the present invention, it is possible to hold stable polarization states of ferroelectric domains for a long retention time, and thus data written in the ferroelectric capacitor a long time ago can be accurately written, thereby improving the reliability of a ferroelectric random access memory (FRAM).
    Type: Grant
    Filed: February 4, 2004
    Date of Patent: December 12, 2006
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Sang-min Shin, Yong-kyun Lee, Bo-soo Kang, Tae-won Noh, Jong-gul Yoon
  • Publication number: 20060261388
    Abstract: A ferroelectric capacitor and a method for manufacturing the same includes a lower electrode, a dielectric layer, and an upper electrode layer, which are sequentially stacked, wherein the dielectric layer has a multi-layer structure including a plurality of sequentially stacked ferroelectric films, and wherein two adjacent ferroelectric films have either different compositions or different composition ratios. Use of a ferroelectric capacitor according to an embodiment of the present invention, it is possible to hold stable polarization states of ferroelectric domains for a long retention time, and thus data written in the ferroelectric capacitor a long time ago can be accurately written, thereby improving the reliability of a ferroelectric random access memory (FRAM).
    Type: Application
    Filed: July 24, 2006
    Publication date: November 23, 2006
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Sang-min Shin, Yong-Kyun Lee, Bo-soo Kang, Tae-won Noh, Jong-gul Yoon
  • Publication number: 20040155272
    Abstract: A ferroelectric capacitor and a method for manufacturing the same includes a lower electrode, a dielectric layer, and an upper electrode layer, which are sequentially stacked, wherein the dielectric layer has a multi-layer structure including a plurality of sequentially stacked ferroelectric films, and wherein two adjacent ferroelectric films have either different compositions or different composition ratios. Use of a ferroelectric capacitor according to an embodiment of the present invention, it is possible to hold stable polarization states of ferroelectric domains for a long retention time, and thus data written in the ferroelectric capacitor a long time ago can be accurately written, thereby improving the reliability of a ferroelectric random access memory (FRAM).
    Type: Application
    Filed: February 4, 2004
    Publication date: August 12, 2004
    Inventors: Sang-min Shin, Yong-kyun Lee, Bo-soo Kang, Tae-won Noh, Jong-gul Yoon