Patents by Inventor Mituhiko Ogihara

Mituhiko Ogihara 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).

  • Light-emitting and light-sensing diode array device, and light-emitting and light-sensing diode with improved sensitivity
    Patent number: 5600157
    Abstract: According to a first aspect of the invention, a light-emitting and light-sensing diode has a doped region with a depth not exceeding 2 .mu.m, for adequate sensitivity, and an impurity concentration of at least 5.times.10.sup.20 atoms/cm.sup.-3, for adequate emission. According to a second aspect of the invention, a light-emitting and light-sensing diode has a doped region with a deep part and a shallow part, and the area of the shallow part is increased to enhance the sensitivity of the diode. This may be done by providing the doped region with a meandering edge, or with one or more interior islands, or by forming the deep and shallow parts separately.
    Type: Grant
    Filed: May 29, 1996
    Date of Patent: February 4, 1997
    Assignee: Oki Electric Industry Co., Ltd.
    Inventors: Ichimatsu Abiko, Yukio Nakamura, Katsuzo Kaminishi, Takatoku Shimizu, Kazuo Tokura, Yasuo Iguti, Hiroshi Furuya, Mituhiko Ogihara, Masumi Taninaka, Mio Chiba