Patents Examined by Kaushihhumar Patel
  • Semiconductor device and driving method the same
    Patent number: 8825943
    Abstract: In a semiconductor device including a control circuit and a memory, the memory includes at least a sector for preventing additional writing and an information sector. When data for preventing additional writing is written to the sector for preventing additional writing and information is written to the information sector which is electrically connected to the sector for preventing additional writing, additional writing to the information sector is impossible.
    Type: Grant
    Filed: August 31, 2010
    Date of Patent: September 2, 2014
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Masato Ishii, Yasuyuki Takahashi, Takuro Ohmaru, Hidetomo Kobayashi, Yutaka Shionoiri