Patents by Inventor Kenichi Cyahara

Kenichi Cyahara 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).

  • Liquid crystal display device and method of manufacturing the same
    Patent number: 6433842
    Abstract: The method of fabrication of a liquid crystal display device includes the steps of: forming a metal thin film on a glass substrate; forming a resist pattern on the metal thin film by photolithography; and wet-etching the metal thin film with an etchant formed of a mixture including phosphoric acid, nitric acid in a range between 7 mol % and 12 mol % inclusive, and at least one of ammonium fluoride and hydrogen fluoride in a trace amount of about 0.01 to 0.1 mol %.
    Type: Grant
    Filed: March 29, 2000
    Date of Patent: August 13, 2002
    Assignee: Hitachi, Ltd.
    Inventors: Toshiki Kaneko, Masaru Takabatake, Takahiro Ochiai, Takuya Takahashi, Katsumi Tamura, Kenichi Onisawa, Kenichi Cyahara, Masatomo Terakado, Yuichi Harano, Hideaki Yamamoto
  • Display device having a wiring multi-layered structure with tapered first layer and a manufacturing process for the tapered structure
    Patent number: 6404473
    Abstract: A liquid crystal display device comprising a wiring line of a laminated structure over an insulating substrate. The laminated structure includes a first layer made of a first metal layer, and a second layer formed over the first layer and made of a second metal layer having the same principal component as that of the first metal layer but a different added element and/or a different composition. The first layer has a side end face of a right-tapered shape, whereas the second layer has a side end face set at a right angle or counter-tapered with respect to the substrate face.
    Type: Grant
    Filed: June 5, 1998
    Date of Patent: June 11, 2002
    Assignee: Hitachi, Ltd.
    Inventors: Toshiki Kaneko, Yuichi Hashimoto, Kikuo Ono, Kazuhiro Ohhara, Takahiro Ochiai, Masaru Takabatake, Kenichi Onisawa, Kenichi Cyahara