Patents by Inventor Katsutoshi Yanagimoto

Katsutoshi Yanagimoto 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).

  • Method of forming corrosion resistant film on the surface of substrate composed of copper or copper alloy
    Patent number: 4634655
    Abstract: A method of forming a corrosion resistant film for a specified image on the surface of a substrate by adding an aliphatic amine such as ethylenediamine, monoethanolamine, diethanolamine triethanolamine to a sensitizing solution composed of water-soluble high molecular compound and ammonium dichromate so as to adjust pH value of the sensitizing solution in the range of 6.1 to 7.8, applying the prepared sensitizing solution to the surface of a substrate of copper or copper alloy, and undergoing each process of drying, exposure and development. After an etching process being applied to the substrate on the surface of which the corrosion resistant film has been formed, the corrosion resistant film is removed to be a finished goods.
    Type: Grant
    Filed: May 15, 1985
    Date of Patent: January 6, 1987
    Assignee: Dainippon Screen Mfg. Co., Ltd.
    Inventors: Katsutoshi Yanagimoto, Shoichi Nagai