Patents by Inventor Kazuko Moriya

Kazuko Moriya 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 devices with shielding for resistance elements
    Patent number: 5428242
    Abstract: A semiconductor device provides for shielding of resistance elements as well as other elongated passive or active components formed in the structure by diffusion of impurities into a polycrystalline silicon layer or a semiconductor substrate and a conductor is formed on an upper surface of the resistance element having a resistance value lower than that of the formed resistance element. Also, the conductor is formed so as to hold a fixed potential value. This structure prevents an invasion or infiltration of impurities which causes a variation in the resistance value of the resistance element. Further, the conductor functions as shielding from noise from a signal line in close proximity to the resistance element or from external noise by means of fixing the conductor at a fixed potential value thereby maintaining the stability of the resistance value of the resistance element.
    Type: Grant
    Filed: October 23, 1992
    Date of Patent: June 27, 1995
    Assignee: Seiko Epson Corporation
    Inventors: Yasunari Furuya, Kazuko Moriya