Patents by Inventor Taeksoo JI

Taeksoo JI 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: 9991416
    Abstract: A light emitting diode and a method of manufacturing the light emitting diode are provided. The light emitting diode includes an n-type semiconductor layer, an inclined type superlattice thin film layer, an active layer, and a p-type semiconductor layer. The n-type semiconductor layer is disposed on a substrate. The inclined type superlattice thin film layer is disposed on the n-type semiconductor layer and includes a plurality of thin film pairs in which InGaN thin films and GaN thin films are sequentially stacked. The active layer having a quantum well structure is disposed on the inclined type superlattice thin film layer. The p-type semiconductor layer is disposed on the active layer. Composition ratio of Indium (In) included in the InGaN thin film is increased as getting closer to the active layer. Thus, internal residual strain is reduced, and quantum confinement effect is enhanced, and internal quantum efficiency is increased.
    Type: Grant
    Filed: June 23, 2017
    Date of Patent: June 5, 2018
    Assignee: INDUSTRY FOUNDATION OF CHONNAM NATIONAL UNIVERSITY
    Inventors: Taeksoo Ji, Jinyoung Park, Jinhong Lee, Wangki Kim, Jaesam Shim, Kwangjae Lee
  • Publication number: 20170294556
    Abstract: A light emitting diode and a method of manufacturing the light emitting diode are provided. The light emitting diode includes an n-type semiconductor layer, an inclined type superlattice thin film layer, an active layer, and a p-type semiconductor layer. The n-type semiconductor layer is disposed on a substrate. The inclined type superlattice thin film layer is disposed on the n-type semiconductor layer and includes a plurality of thin film pairs in which InGaN thin films and GaN thin films are sequentially stacked. The active layer having a quantum well structure is disposed on the inclined type superlattice thin film layer. The p-type semiconductor layer is disposed on the active layer. Composition ratio of Indium (In) included in the InGaN thin film is increased as getting closer to the active layer. Thus, internal residual strain is reduced, and quantum confinement effect is enhanced, and internal quantum efficiency is increased.
    Type: Application
    Filed: June 23, 2017
    Publication date: October 12, 2017
    Applicant: INDUSTRY FOUNDATION OF CHONNAM NATIONAL UNIVERSITY
    Inventors: Taeksoo JI, Jinyoung PARK, Jinhong LEE, Wangki KIM, Jaesam SHIM, Kwangjae LEE
  • Publication number: 20170025568
    Abstract: A light emitting diode and a method of manufacturing the light emitting diode are provided. The light emitting diode includes an n-type semiconductor layer, an inclined type superlattice thin film layer, an active layer, and a p-type semiconductor layer. The n-type semiconductor layer is disposed on a substrate. The inclined type superlattice thin film layer is disposed on the n-type semiconductor layer and includes a plurality of thin film pairs in which InGaN thin films and GaN thin films are sequentially stacked. The active layer having a quantum well structure is disposed on the inclined type superlattice thin film layer. The p-type semiconductor layer is disposed on the active layer. Composition ratio of Indium (In) included in the InGaN thin film is increased as getting closer to the active layer. Thus, internal residual strain is reduced, and quantum confinement effect is enhanced, and internal quantum efficiency is increased.
    Type: Application
    Filed: March 10, 2016
    Publication date: January 26, 2017
    Inventors: Taeksoo JI, Jinyoung PARK, Jinhong LEE, Wangki KIM, Jaesam SHIM, Kwangjae LEE