Patents by Inventor Tooru Takeguchi

Tooru Takeguchi 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 displaying apparatus and method of manufacturing TFT array
    Patent number: 5999235
    Abstract: A method of manufacturing TFT array substrate comprises forming a control electrode and a control electrode line on a transparent insulating substrate, forming an insulating film on the control electrode and the control electrode line, forming a semiconductor layer through the insulating film on the control electrode and the control electrode line, forming a transparent conductive film on the insulating film, forming a picture element electrode by etching the transparent conductive film with an etchant including concentrated hydrochloric acid mixed with concentrated sulfuric acid and having water as main component, and forming a pair of electrodes on the semiconductor layer.
    Type: Grant
    Filed: June 20, 1997
    Date of Patent: December 7, 1999
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Tooru Takeguchi, Kouji Yabushita, Masami Hayashi