Patents by Inventor Chan Ki Ha

Chan Ki Ha 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: 11935876
    Abstract: A light-emitting element ink, a display device, and a method of fabricating the display device are provided. The light-emitting element ink includes a light-emitting element solvent, light-emitting elements dispersed in the light-emitting element solvent, each of the light-emitting elements including a plurality of semiconductor layers and an insulating film that surrounds parts of outer surfaces of the semiconductor layers, and a surfactant dispersed in the light-emitting element solvent, the surfactant including a fluorine-based and/or a silicon-based surfactant.
    Type: Grant
    Filed: April 27, 2021
    Date of Patent: March 19, 2024
    Assignee: Samsung Display Co., Ltd.
    Inventors: Jun Bo Sim, Duk Ki Kim, Yong Hwi Kim, Hyo Jin Ko, Chang Hee Lee, Chan Woo Joo, Jae Kook Ha, Na Mi Hong
  • Patent number: 9117846
    Abstract: A method of manufacturing an oxide thin film transistor includes forming a gate electrode on a substrate; forming a gate insulating film the gate electrode; forming an oxide semiconductor layer on the gate insulating film; sequentially forming a lower data metal layer and an upper data metal layer on including the oxide semiconductor layer; forming an upper source pattern and an upper drain pattern by patterning the upper data metal layer by a wet etching; forming a lower source pattern and a lower drain pattern by patterning the lower data metal layer by a dry etching using the upper source pattern and the upper drain pattern as a mask to form a source electrode and a drain electrode; forming a first passivation film on the source and drain electrodes; performing a heat treatment on the oxide semiconductor layer; and forming a second passivation film on the first passivation film.
    Type: Grant
    Filed: October 16, 2013
    Date of Patent: August 25, 2015
    Assignee: LG DISPLAY CO., LTD.
    Inventors: Sang-Moo Park, Bong-Chul Kim, Chan-Ki Ha, Jin-Woo Kwon, Heung-Jo Lee
  • Patent number: 8877533
    Abstract: A method of manufacturing oxide thin film transistor and display device are provided. In the method of manufacturing an oxide thin film transistor, the method includes: forming an active layer of an oxide semiconductor on a substrate, and performing surface treatment with plasma for the active layer to permeate oxygen into the active layer.
    Type: Grant
    Filed: November 21, 2012
    Date of Patent: November 4, 2014
    Assignee: LG Display Co., Ltd.
    Inventors: Kyechul Choi, Bong Chul Kim, Chan Ki Ha, Sang Moo Park
  • Publication number: 20140147967
    Abstract: A method of manufacturing an oxide thin film transistor includes forming a gate electrode on a substrate; forming a gate insulating film the gate electrode; forming an oxide semiconductor layer on the gate insulating film; sequentially forming a lower data metal layer and an upper data metal layer on including the oxide semiconductor layer; forming an upper source pattern and an upper drain pattern by patterning the upper data metal layer by a wet etching; forming a lower source pattern and a lower drain pattern by patterning the lower data metal layer by a dry etching using the upper source pattern and the upper drain pattern as a mask to form a source electrode and a drain electrode; forming a first passivation film on the source and drain electrodes; performing a heat treatment on the oxide semiconductor layer; and forming a second passivation film on the first passivation film.
    Type: Application
    Filed: October 16, 2013
    Publication date: May 29, 2014
    Applicant: LG DISPLAY CO., LTD.
    Inventors: Sang-Moo Park, Bong-Chul Kim, Chan-Ki Ha, Jin-Woo Kwon, Heung-Jo Lee
  • Patent number: 8110829
    Abstract: A thin film transistor (TFT) for a liquid crystal display device includes a gate electrode, a source electrode, a drain electrode, an active region including a first semiconductor layer and a second semiconductor layer interposed within the first semiconductor layer, and an ohmic contact layer formed on the active region, wherein the source and drain electrodes are formed on the ohmic contact layer.
    Type: Grant
    Filed: December 30, 2008
    Date of Patent: February 7, 2012
    Assignee: LG Display Co., Ltd.
    Inventors: Yong Soo Cho, Chan Ki Ha, Byoung Ho Lim, Cheol Se Kim, Kyo Ho Moon, Kwang Sik Oh, Eung Do Kim, Jae Hyung Jo, Min Jae Lee
  • Publication number: 20090166630
    Abstract: A thin film transistor (TFT) for a liquid crystal display device includes a gate electrode, a source electrode, a drain electrode, an active region including a first semiconductor layer and a second semiconductor layer interposed within the first semiconductor layer, and an ohmic contact layer formed on the active region, wherein the source and drain electrodes are formed on the ohmic contact layer.
    Type: Application
    Filed: December 30, 2008
    Publication date: July 2, 2009
    Inventors: Yong Soo Cho, Chan Ki Ha, Byoung Ho Lim, Cheol Se Kim, Kyo Ho Moon, Kwang Sik Oh, Eung Do Kim, Jae Hyung Jo, Min Jae Lee