Patents by Inventor Takao Suyama

Takao Suyama 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).

  • Semiconductor laser device and method for manufacturing the same
    Patent number: 5907571
    Abstract: A semiconductor laser device is provided which includes a laser diode chip mounted on a sub-mount, a monitor photo diode incorporated in the sub-mount, for monitoring a laser beam emitted by the laser diode chip, a metallic main plate mounting the laser diode chip and the monitor photo diode, an end-face breaking protective layer covering the laser diode chip and the sub-mount; and a seal resin in which the laser diode chip, the monitor photo diode, the end-face breaking preventive layer and at least a portion of the metallic main plate are sealed. In this semiconductor device, a space is provided at a portion of an interface between the end-face breaking preventive layer and the seal resin, which portion is adapted to be irradiated with a monitor laser beam emitted by the laser diode chip, with a light intensity that is not higher than a half of a peak value of the intensity of the monitor laser beam.
    Type: Grant
    Filed: May 19, 1997
    Date of Patent: May 25, 1999
    Assignee: Fuji Electric Co., Ltd.
    Inventors: Shinji Ogino, Shoji Kitamura, Hiromi Mojikawa, Yoichi Shindo, Takao Suyama, Ken Komatsu