Patents by Inventor Tatsuo Abe, legal representative

Tatsuo Abe, legal representative 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 resistor, method of manufacturing the same, and current generating device using the same
    Patent number: 7944000
    Abstract: A method for manufacturing a semiconductor resistor includes forming a well region in a semiconductor substrate, with the well region serving as a resistive region, forming a pair of contact regions spaced apart from each other in the well region, and forming a diffusion region in an intermediate portion between the pair of contact regions on a surface of the well region. The diffusion region is configured to adjust resistance and temperature dependence of the semiconductor resistor.
    Type: Grant
    Filed: June 11, 2007
    Date of Patent: May 17, 2011
    Assignee: Ricoh Company, Ltd.
    Inventors: Masaya Ohtsuka, Hiroaki Abe, Tatsuo Abe, legal representative