Patents by Inventor Tomoyuki Tachikawa

Tomoyuki Tachikawa 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: 20050153058
    Abstract: The main object of the present invention is to provide a method for manufacturing an EL element, capable of preferably carrying out the peeling operation at the time of peeling off an unnecessary layer such as a photoresist layer. In order to achieve the object, the present invention provides a method for manufacturing an EL element comprising: an organic EL layer forming process of forming an organic EL layer on a substrate, on which at least an electrode layer is formed; a peeling layer forming process of forming a peeling layer on the organic EL layer; a photoresist layer forming process of forming a photoresist layer on the peeling layer; a photoresist layer patterning process of patterning the photoresist layer by exposing and developing; an organic EL layer developing process of removing the organic EL layer of a part not covered with the photoresist layer; and a peeling layer peeling process of removing the photoresist layer laminated thereon by peeling off the peeling layer.
    Type: Application
    Filed: May 8, 2003
    Publication date: July 14, 2005
    Inventors: Tomoyuki Tachikawa, Norihito Ito
  • Publication number: 20050151469
    Abstract: There is provided a light emitting element comprising a luminescent layer provided without any partition wall for partitioning luminescent layers. The light emitting element comprises a substrate and a first electrode, a plurality of luminescent layers, and a second electrode provided on the substrate in that order. The plurality of luminescent layers are provided without providing any partition wall between adjacent luminescent layers.
    Type: Application
    Filed: December 29, 2004
    Publication date: July 14, 2005
    Applicant: Dai Nippon Printing Co., Ltd.
    Inventor: Tomoyuki Tachikawa
  • Publication number: 20050032453
    Abstract: The main object of the present invention is to provide a method for manufacturing an EL element, capable of preventing deterioration of the element characteristic by the developing agent or the rinsing agent, while providing the advantages of the photolithography method of high light emitting efficiency and taking out efficiency, the manufacturing process simplicity, and the highly sophisticated pattern formation. In order to achieve the above mentioned object, the present invention provides a method for manufacturing an organic EL element comprising at least a patterned organic light emitting layer, wherein the patterning is conducted by etching with a protecting layer pattern laminated on an organic light emitting layer.
    Type: Application
    Filed: April 24, 2003
    Publication date: February 10, 2005
    Inventors: Tomoyuki Tachikawa, Toru Miyake, Shinichi Handa, Norihito Ito
  • Publication number: 20040224263
    Abstract: A main object of the present invention is to provide a method for manufacturing an EL element which can avoid a state which plural unnecessary layers are laminated on each pattern-formed light-emitting portion when the light-emitting portions are formed by photolithography and thus enables quick and easy peeling treatment in the peeling process of the unnecessary layers.
    Type: Application
    Filed: September 3, 2003
    Publication date: November 11, 2004
    Inventors: Norihito Itou, Tomoyuki Tachikawa
  • Publication number: 20040152223
    Abstract: The main object of the present invention is to provide a method for manufacturing an EL element capable of :preventing the state in which number of excessive layers are laminated on each light emitting part formed in a pattern at the time of forming the light emitting parts using the photolithography method; executing the peeling treatment easily and quickly in the excessive layer peeling process; and preventing generation of color mixture or pixel narrowing derived from the elution of the patterned light emitting part into the light emitting layer coating solution to be coated later, at the end part thereof, at the time of coating a light emitting layer coating solution.
    Type: Application
    Filed: January 23, 2004
    Publication date: August 5, 2004
    Inventors: Tomoyuki Tachikawa, Norihito Ito