Patents by Inventor Kanichi Yokota

Kanichi Yokota 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).

  • Process for forming a polyimide pattern with photosensitive composition for i-line stepper
    Patent number: 6482569
    Abstract: The present invention provides photosensitive compositions which comprise polyimide precursors having a chemical structure selected from several specific chemical structures and/or specific amide bond density and are adjusted so that the film obtained by applying and drying the composition may exhibit a specific absorbance to light. The polyimide film obtained by heat-curing the above photosensitive composition exhibits excellent physical properties and water resistance, and has high adhesive strength to epoxy resins, inorganic materials and metals.
    Type: Grant
    Filed: May 17, 2000
    Date of Patent: November 19, 2002
    Assignee: Asahi Kasei Kabushiki Kaisha
    Inventors: Yoshio Matsuoka, Kanichi Yokota, Yasuhiro Kataoka
  • Photosensitive polyimide precursor compositions processable by exposure to short wavelength light
    Patent number: 6162580
    Abstract: The present invention provides photosensitive compositions which comprise polyimide precursors having a chemical structure selected from several specific chemical structures and/or specific amide bond density and are adjusted so that the film obtained by applying and drying the composition may exhibit a specific absorbance to light. The polyimide film obtained by heat-curing the above photosensitive composition exhibits excellent physical properties and water resistance, and has high adhesive strength to epoxy resins, inorganic materials and metals.
    Type: Grant
    Filed: May 26, 1995
    Date of Patent: December 19, 2000
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Yoshio Matsuoka, Kanichi Yokota, Yasuhiro Kataoka