Patents by Inventor Keong-Su Lim

Keong-Su Lim 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).

  • Publication number: 20140007933
    Abstract: Disclosed are a thin film solar cell and a method of manufacturing the thin film solar cell. The thin film solar cell according to an exemplary embodiment of the present invention thin film solar cell includes a substrate: a front electrode layer formed on the substrate; an oxide layer formed on the front electrode layer: a light absorbing layer (intrinsic layer) formed on the oxide layer; and a back electrode layer formed on the light absorbing layer, wherein the oxide layer is formed of a material selected from MoO2, WO2, V2O5, NiO and CrO3.
    Type: Application
    Filed: August 10, 2012
    Publication date: January 9, 2014
    Applicant: KOREA INSTITUTE OF MACHINERY & MATERIALS
    Inventors: Seoung Yoon RYU, Dong Ho KIM, Kee Seok NAM, Yong Soo JEONG, Jung Dae KWON, Sung Hun LEE, Jung Heum YUN, Gun Hwan LEE, Hyung Hwan JUNG, Sung Gyu PARK, Chang Su KIM, Jae Wook KANG, Keong Su LIM, Sang II PARK
  • Patent number: 8426841
    Abstract: The present invention relates to a transparent memory for a transparent electronic device. The transparent memory includes: a lower transparent electrode layer that is sequentially formed on a transparent substrate, and a data storage region and an upper transparent layer which are made of at least one transparent resistance-variable material layer. The transparent resistance-variable material layer has switching characteristics as a result of the resistance variance caused by the application of a certain voltage between the lower and upper transparent electrode layers. An optical band gap of the transparent resistance-variable material layer is 3 eV or more, and transmittivity of the material layer for visible rays is 80% or more. The invention provides transparent and resistance-variable memory that: has very high transparency and switching characteristics depending on resistance variation at a low switching voltage, and can maintain the switching characteristics thereof after a long time elapses.
    Type: Grant
    Filed: July 23, 2009
    Date of Patent: April 23, 2013
    Assignee: Korea Advanced Institute of Science and Technology
    Inventors: Jung Won Seo, Keong Su Lim, Jae Woo Park, Ji Hwan Yang, Sang Jung Kang
  • Publication number: 20120132882
    Abstract: The present invention relates to a transparent memory for a transparent electronic device. The transparent memory includes: a lower transparent electrode layer that is sequentially formed on a transparent substrate, and a data storage region and an upper transparent layer which are made of at least one transparent resistance-variable material layer. The transparent resistance-variable material layer has switching characteristics as a result of the resistance variance caused by the application of a certain voltage between the lower and upper transparent electrode layers. An optical band gap of the transparent resistance-variable material layer is 3 eV or more, and transmittivity of the material layer for visible rays is 80% or more. The invention provides transparent and resistance-variable memory that: has very high transparency and switching characteristics depending on resistance variation at a low switching voltage, and can maintain the switching characteristics thereof after a long time elapses.
    Type: Application
    Filed: July 23, 2009
    Publication date: May 31, 2012
    Applicant: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Jung Won Seo, Keong Su Lim, Jae Woo Park, Ji Hwan Yang, Sang Jung Kang
  • Patent number: 6866721
    Abstract: Apparatus for a photo-induced process are provided, which implement a transparent film (instead of an optical window), to reduce light absorption loss that would result from use of an optical window. A photo-induced process apparatus eliminates problems of conventional systems which use optical windows, such as blurring an optical window and the surface of a light source, photo absorption loss due to the optical window and/or a purge cleaning gas, and dust generation by a moving part such as a flexible curtain. A photo-induced process apparatus efficiently utilizes light emitted from a light source.
    Type: Grant
    Filed: April 1, 2002
    Date of Patent: March 15, 2005
    Assignee: Korea Advanced Institute of Science and Technology
    Inventors: Keong-Su Lim, Sang-Su Kim
  • Patent number: 6674235
    Abstract: A photocathode structure having a photoelectric face plate protective layer, in order to prevent a photoelectric effect from being deteriorated sharply due to a high reaction of oxygen with respect to most of existing photoelectric face plate materials when the photoelectric face plate used for generating photoelectrons by a photoelectric effect is exposed to the atmosphere, is provided. For example, a diamond-like carbon thin layer is used as a photocathode protective layer, to thereby perform a function of protection of the photoelectric face plate through isolation of the photoelectric face plate from the atmosphere and enable electrons generated from the photoelectric face plate to pass through a diamond-like carbon thin layer, which is deposited thinly, by the tunneling effect so that the performance of the photocathode is not affected.
    Type: Grant
    Filed: April 1, 2002
    Date of Patent: January 6, 2004
    Assignee: Korea Advanced Institute of Science and Technology
    Inventors: Keong-Su Lim, Duk-Young Jeon, Chang-Hyun Lee, Sang-Su Kim
  • Publication number: 20030048075
    Abstract: A photocathode structure having a photoelectric face plate protective layer, in order to prevent a photoelectric effect from being deteriorated sharply due to a high reaction of oxygen with respect to most of existing photoelectric face plate materials when the photoelectric face plate used for generating photoelectrons by a photoelectric effect i s exposed to the atmosphere, is provided. For example, a diamond-like carbon thin layer is used as a photocathode protective layer, to thereby perform a function of protection of the photoelectric face plate through isolation of the photoelectric face plate from the atmosphere and enable electrons generated from the photoelectric face plate to pass through a diamond-like carbon thin layer, which is deposited thinly, by the tunneling effect so that the performance of the photocathode is not affected.
    Type: Application
    Filed: April 1, 2002
    Publication date: March 13, 2003
    Applicant: Korea Advanced Institute of Science and Technology
    Inventors: Keong-Su Lim, Duk-Young Jeon, Chang-Hyun Lee, Sang-Su Kim
  • Publication number: 20030047133
    Abstract: A photo-induced process apparatus uses a transparent film instead of an optical window, to thereby reduce a light absorption loss by use of an optical window.
    Type: Application
    Filed: April 1, 2002
    Publication date: March 13, 2003
    Applicant: Korea Advanced Institute of Science and Technology
    Inventors: Keong-Su Lim, Sang-Su Kim