Patents by Inventor Yausunobu Matsuoka

Yausunobu Matsuoka 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).

  • Superlattice avalanche photodiode (APD)
    Patent number: 5543629
    Abstract: A superlattice APD includes light absorption layer for generating carriers by absorbing light, a multiplication layer for multiplying the carriers, and a pair of electrodes for driving the carriers. The multiplication layer includes a superlattice structure with a well layer less than 10 nm in thickness and a barrier layer more than 10 nm and less than 20 nm in thickness deposited in alternate layers.
    Type: Grant
    Filed: February 21, 1995
    Date of Patent: August 6, 1996
    Assignee: Hitachi, Ltd.
    Inventors: Hitoshi Nakamura, Shoichi Hanatani, Shigehisa Tanaka, Tsukuru Ohtoshi, Koji Ishida, Yausunobu Matsuoka