Patents by Inventor Atumi Kawata

Atumi Kawata 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 device having an optical waveguide interposed in the space between electrode members
    Patent number: 5394490
    Abstract: A clock signal supply system is disclosed for a semiconductor device with a semiconductor chip and a wiring substrate connected in flip-chip fashion and an optical waveguide interposed in the space between electrode members, in which the mutual arrangement of the electrical interconnection and the optical waveguide interconnection on the wiring substrate is not affected and can be used separately from each other for different applications, thereby improving the throughput of the interconnections as a whole.
    Type: Grant
    Filed: August 11, 1993
    Date of Patent: February 28, 1995
    Assignee: Hitachi, Ltd.
    Inventors: Takeshi Kato, Yuuji Fujita, Kenichi Mizuishi, Atumi Kawata, Hiroyuki Itoh