Patents by Inventor Tomoko Matoba

Tomoko Matoba 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: 9136475
    Abstract: The present invention is to provide a method of favorably forming an organic EL device with the inverted structure by the wet process. On that account, an organic EL device includes a cathode, an electron injection layer, a light emitting layer, a hole transport layer, a hole injection layer, an anode are formed in this order on a substrate. The electron injection layer is formed by applying ink between banks and drying the ink. The ink is formed by dissolving a polymer compound having an organic phosphine oxide skeleton in an alcohol solvent. The light emitting layer is formed by applying ink between components of the bank and the drying the ink. The ink is formed by dissolving material for light emitting layer such as polyphenylene vinylene (PPV) derivative or polyfluorene derivative in a nonpolar solvent.
    Type: Grant
    Filed: December 5, 2012
    Date of Patent: September 15, 2015
    Assignees: JOLED INC., DYDEN CORPORATION
    Inventors: Kenji Okumoto, Gosuke Sakamoto, Masaomi Shibata, Izumi Kakinoki, Masataka Watanabe, Tomoko Matoba, Mitsuharu Noto, Yasuyuki Goto