Patents by Inventor Hyunduck Cho

Hyunduck Cho 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: 20160133725
    Abstract: A method of manufacturing a thin-film transistor (TFT) having uniform performance in terms of threshold voltage and the like, the TFT, and a display apparatus including the same are disclosed. The method includes: (i) forming a polysilicon layer having a source region, a drain region, and a channel region between the source region and the drain region; (ii) doping a central region in the channel region with a first impurity except for peripheral portions; and (iii) doping the source region and the drain region with a second impurity of a conductivity type that is different from that of the first impurity.
    Type: Application
    Filed: September 1, 2015
    Publication date: May 12, 2016
    Inventors: Youngjun Chung, Hyunduck Cho
  • Publication number: 20160118453
    Abstract: An organic light-emitting display apparatus includes a display that includes an organic emission layer and a thin film transistor that drives the organic emission layer, and a backlight that irradiates light toward the thin film transistor.
    Type: Application
    Filed: March 30, 2015
    Publication date: April 28, 2016
    Inventor: Hyunduck CHO
  • Publication number: 20160072090
    Abstract: A method of fabricating an organic light-emitting device, including: providing a substrate; forming a control electrode on the substrate; forming an insulating layer covering at least a top surface of the control electrode; forming a hole transport layer pattern through printing on at least a part of the insulating layer; forming an organic light-emitting layer to be in contact with at least a part of a surface of the hole transport layer pattern; forming an electron transport layer pattern through printing to be in contact with at least a part of a surface of the organic light-emitting layer; and forming a first electrode and a second electrode respectively on the hole transport layer pattern and the electron transport layer pattern.
    Type: Application
    Filed: November 13, 2015
    Publication date: March 10, 2016
    Applicant: SNU R&DB FOUNDATION
    Inventors: Hyunduck CHO, Jeongkyun ROH, Hyunkoo LEE, Changhee LEE, Yongtaek HONG
  • Publication number: 20160043233
    Abstract: Provided are a thin film transistor (TFT) and a method of manufacturing the TFT. The TFT includes a substrate; a first conductive type semiconductor layer on the substrate and having a recess; second conductive type spacers at opposite side walls in the recess; a main semiconductor layer covering the first conductive type semiconductor layer and the second conductive type spacers and comprising a channel region and source and drain regions; a gate insulating layer on the main semiconductor layer; and a gate electrode on the gate insulating layer and corresponding to the recess.
    Type: Application
    Filed: March 3, 2015
    Publication date: February 11, 2016
    Inventors: Suk Hoon Ku, Hyunduck Cho
  • Publication number: 20160027814
    Abstract: A backplane for a display apparatus includes a substrate including a display area and a non-display area; a first transistor formed on the display area; and a second transistor formed on the non-display area, wherein a first active layer includes a first channel area, a first source area disposed on one side of the first channel area, a first drain area disposed on the other side of the first channel area, and a low-density doped area and a halo doped area that are adjacent to both ends of the first gate electrode, and the second active layer includes a second channel area, a second source area disposed on one side of the second channel area, and a second drain area disposed on the other side of the second channel area.
    Type: Application
    Filed: December 12, 2014
    Publication date: January 28, 2016
    Inventors: Minhyun Jin, Hyunduck Cho
  • Patent number: 9240570
    Abstract: Provided is a method of fabricating an organic light-emitting device. The method of fabricating an organic light-emitting device includes: providing a substrate; forming a control electrode on the substrate; forming an insulating layer covering at least a top surface of the control electrode; forming a hole transport layer pattern through printing on at least a part of the insulating layer; forming an organic light-emitting layer to be in contact with at least a part of a surface of the hole transport layer pattern; forming an electron transport layer pattern through printing to be in contact with at least a part of a surface of the organic light-emitting layer; and forming a first electrode and a second electrode respectively on the hole transport layer pattern and the electron transport layer pattern.
    Type: Grant
    Filed: February 7, 2013
    Date of Patent: January 19, 2016
    Assignee: SNU R&DB FOUNDATION
    Inventors: Hyunduck Cho, Jeongkyun Roh, Hyunkoo Lee, Changhee Lee, Yong Taek Hong