Patents Represented by Attorney Sixbey, Friedman, Leedon & Ferguson, PC

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  • Electric device, matrix device, electro-optical display device, and semiconductor memory having thin-film transistors
    Patent number: 5854494
    Abstract: A circuit adapted to dynamically activate an electro-optical display device is constructed from a thin-film gate-insulated semiconductor device. This device comprises PMOS TFTs producing only a small amount of leakage current. Besides the dynamic circuit, a CMOS circuit comprising both NMOS and PMOS thin-film transistors is constructed to drive the dynamic circuit.
    Type: Grant
    Filed: June 30, 1994
    Date of Patent: December 29, 1998
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Shunpei Yamazaki, Yasuhiko Takemura