Patents by Inventor Dug Jang Lee

Dug Jang Lee 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).

  • Apparatus for etching or stripping substrate of liquid crystal display device and method thereof
    Patent number: 7897056
    Abstract: Disclosed are an apparatus for etching or stripping a substrate of a liquid crystal display device and a method thereof. The present invention includes carrying out an etching or stripping process on substrates using an etchant in a first etchant tank, counting a number of the substrates etched or stripped using the etchant in the first etchant tank, checking readiness of a second etchant tank at a predetermined point in time before the counted number reaches a maximum substrate number set up previously for the etchant tanks, and carrying out the etching or stripping process on the substrates using an etchant in the second etchant tank when the second etchant tank is in readiness for use and the counted number reaches the maximum substrate number.
    Type: Grant
    Filed: October 18, 2002
    Date of Patent: March 1, 2011
    Assignee: LG Display Co., Ltd.
    Inventors: Won Jae Lee, Dug Jang Lee
  • Apparatus for etching or stripping substrate of liquid crystal display device and method thereof
    Publication number: 20030085195
    Abstract: Disclosed are an apparatus for etching or stripping a substrate of a liquid crystal display device and a method thereof. The present invention includes carrying out an etching or stripping process on substrates using an etchant in a first etchant tank, counting a number of the substrates etched or stripped using the etchant in the first etchant tank, checking readiness of a second etchant tank at a predetermined point in time before the counted number reaches a maximum substrate number set up previously for the etchant tanks, and carrying out the etching or stripping process on the substrates using an etchant in the second etchant tank when the second etchant tank is in readiness for use and the counted number reaches the maximum substrate number.
    Type: Application
    Filed: October 18, 2002
    Publication date: May 8, 2003
    Inventors: Won Jae Lee, Dug Jang Lee