Patents by Inventor Yung Ryu

Yung Ryu 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: 20070099317
    Abstract: A method for manufacturing a vertical light emitting diode of the invention allows an easier process of individually separating chips. A light emitting structure is formed on a growth substrate having a plurality of device areas and at least one device isolation area. The light emitting structure has an n-type clad layer, an active layer and a p-type clad layer sequentially formed therein. Corresponding p-type electrodes are formed on the light emitting structure on the device areas. A glass substrate having through holes perforated therein is provided on the p-electrodes so that the through holes are disposed corresponding to the p-electrodes. Also, the through holes are plated with a metal material to form patterns of a plating layer on the p-electrodes. Then, the growth substrate is removed to form n-electrodes on the n-type clad layer. The glass substrate is removed via etching.
    Type: Application
    Filed: September 18, 2006
    Publication date: May 3, 2007
    Inventors: Yung Ryu, Hae Hwang
  • Publication number: 20070090382
    Abstract: A light emitting diode package is provided. A package body has a mounting part surrounded by side walls and lead electrodes on a bottom surface of the mounting part. A light emitting diode chip is mounted on the bottom surface of the mounting part and electrically connected to the lead electrodes. A resin encapsulant is filled in the mounting part to encapsulate the light emitting diode chip. At least one residual resin storage is formed on a top surface of a corresponding one of the side walls to guide and accommodate a residual resin for forming the encapsulant of a preset height. Further, a storing groove is formed on the top surface of the corresponding side wall and a guiding groove is formed to guide the residual resin to the storing groove. This produces the light emitting diode package with uniform color distribution regardless of a liquid resin amount injected.
    Type: Application
    Filed: October 5, 2006
    Publication date: April 26, 2007
    Inventor: Yung Ryu
  • Publication number: 20070077673
    Abstract: There is provided a method for manufacturing a vertically structured LED capable of performing a chip separation process with ease. In the method, a light-emitting structure is formed on a growth substrate having a plurality of device regions and at least one device isolation region, wherein the light-emitting structure has an n-type clad layer, an active layer and a p-type clad layer which are disposed on the growth substrate in sequence. A p-electrode is formed on the light-emitting structure. Thereafter, a first plating layer is formed on the p-electrode such that it connects the plurality of device isolation regions. A pattern of a second plating layer is formed on the first plating layer of the device region. The growth substrate is removed, and an n-electrode is then formed on the n-type clad layer.
    Type: Application
    Filed: October 3, 2006
    Publication date: April 5, 2007
    Inventors: Hae Hwang, Yung Ryu, Da Shim, Se Ahn
  • Publication number: 20060234411
    Abstract: The invention relates to a method of manufacturing a semiconductor light emitting diode. In the method, an n-type nitride semiconductor layer, an active layer and a p-type nitride semiconductor layer are formed sequentially on a substrate. Then, a nickel oxide (NiOx) film is directly deposited on the p-type semiconductor layer via reactive sputtering or reactive deposition in an oxidizing atmosphere. Also, a light transmissible conductive oxide layer is formed on the nickel oxide film.
    Type: Application
    Filed: April 7, 2006
    Publication date: October 19, 2006
    Inventors: Yung Ryu, Pil Kang
  • Publication number: 20060208264
    Abstract: A nitride semiconductor LED improved in lighting efficiency and a fabrication method thereof, in which an n-doped semiconductor layer is formed on a substrate. An active layer is formed on the n-doped semiconductor layer to expose at least a partial area of the n-doped semiconductor layer. A p-doped semiconductor layer is formed on the active layer. A p+-doped semiconductor layer is formed on the p-doped semiconductor layer. An n+-doped semiconductor layer is formed in at least a partial upper region of the p+-doped semiconductor layer via n-dopant ion implantation. The n+-doped semiconductor layer cooperates with an underlying partial region of the p+-doped semiconductor layer to realize a reverse bias tunneling junction. Also, an upper n-doped semiconductor layer is formed on the n+-doped semiconductor layer to realize lateral current spreading. The invention can improve lighting efficiency by using the reverse bias tunneling junction and/or the lateral current spreading.
    Type: Application
    Filed: May 24, 2006
    Publication date: September 21, 2006
    Inventors: Yung Ryu, Kee Yang, Bang Oh, Jin Park, Young Kim
  • Publication number: 20050208686
    Abstract: A nitride semiconductor LED improved in lighting efficiency and a fabrication method thereof, in which an n-doped semiconductor layer is formed on a substrate. An active layer is formed on the n-doped semiconductor layer to expose at least a partial area of the n-doped semiconductor layer. A p-doped semiconductor layer is formed on the active layer. A p+-doped semiconductor layer is formed on the p-doped semiconductor layer. An n+-doped semiconductor layer is formed in at least a partial upper region of the p+-doped semiconductor layer via n-dopant ion implantation. The n+-doped semiconductor layer cooperates with an underlying partial region of the p+-doped semiconductor layer to realize a reverse bias tunneling junction. Also, an upper n-doped semiconductor layer is formed on the n+-doped semiconductor layer to realize lateral current spreading. The invention can improve lighting efficiency by using the reverse bias tunneling junction and/or the lateral current spreading.
    Type: Application
    Filed: June 25, 2004
    Publication date: September 22, 2005
    Inventors: Yung Ryu, Kee Yang, Bang Oh, Jin Park, Young Kim
  • Publication number: 20050179045
    Abstract: Disclosed is a nitride semiconductor LED and a fabrication method thereof. An n-doped semiconductor layer, an active layer, a p-doped semiconductor layer and a p+-doped semiconductor layer are formed in their order on a substrate. A resultant semiconductor structure is mesa-etched to expose a partial area of the n-doped semiconductor layer. The p+-doped semiconductor layer and the exposed area of the n-doped semiconductor layer are n-doped at a high concentration to form first and second n+-doped regions, respectively. P- and n-electrodes are formed on the first and second n+-doped regions, respectively. Then, reverse bias is created to improve an ohmic contact structure between a semiconductor layer and a metal electrode thereby lowering drive voltage while raising overvoltage resistance and luminance.
    Type: Application
    Filed: June 2, 2004
    Publication date: August 18, 2005
    Inventors: Yung Ryu, Kee Yang, Bang Oh, Jin Park