Patents by Inventor Yukito Kawahara

Yukito Kawahara 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 manufacturing semiconductor device having trapezoidal shaped substrate sections
    Patent number: 4839300
    Abstract: A method for manufacturing a semiconductor device using inclined stage of a dicing saw in order to cut the semiconductor substrate obliquely with respect to the depthwise direction. When a plurality of semiconductor chips diced obliquely are connected, a degree of connecting accuracy is increased, and it is possible to realize a contact-type image sensor of high resolving power and high accuracy.
    Type: Grant
    Filed: December 3, 1986
    Date of Patent: June 13, 1989
    Assignee: Seiko Instruments & Electronics Ltd.
    Inventors: Yukito Kawahara, Hiroshi Mukainakano, Satoshi Machida
  • Active matrix-addressed liquid-crystal display device
    Patent number: 4680580
    Abstract: An active matrix-addressed liquid crystal panel comprising plural matrix picture elements is disclosed. The defects of a picture caused by a short between a row electrode and a substrate is inconspicious because each row electrode controls the picture elements belonging to the row as well as the picture elements belonging to the neighboring rows.
    Type: Grant
    Filed: February 18, 1983
    Date of Patent: July 14, 1987
    Assignee: Kabushiki Kaisha Daini Seikosha
    Inventor: Yukito Kawahara