Patents by Inventor Eun-Ha Heo

Eun-Ha Heo 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).

  • Photoresist solution for phosphor slurry applied to color cathode ray tube
    Patent number: 6127074
    Abstract: The present invention relates to photoresist solution for phosphor slurry for use in the color cathode ray tube. The photoresist solution of the present invention comprises Diazo or Bisazide photosensitizer; polymer. which is mixed with said Diazo or Bisazide photosensitizer, obtained by polymerization of hydroxy ethyl acrylate base. The photoresist solution of the present invention improves the adhesive strength by using of the Diazo or Bisazide photosensitizer and the polymer, thus the green, blue and red phosphor screen being uniformly formed and the color residue being disappeared. Further, since the photosensitizer not containing heavy metal is used, it does not cause any environmental problem. Also, it can be stored for a long time by using the initiator without hydrochloric acid at the time of polymerization.
    Type: Grant
    Filed: December 11, 1998
    Date of Patent: October 3, 2000
    Assignee: Samsung Display Devices Co., Ltd.
    Inventors: Seung-Jun You, Eak-Cheol Eam, Young-Jong Kang, Chang-Wook Kim, Gi-Wook Kang, Eun-Ha Heo