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    • 19. 发明授权
    • Non-volatile semiconductor memory
    • 非易失性半导体存储器
    • US07277323B2
    • 2007-10-02
    • US11143709
    • 2005-06-03
    • Yoshihisa SugiuraTakashi Suzuki
    • Yoshihisa SugiuraTakashi Suzuki
    • G11C16/00
    • G11C16/349G11C16/0483G11C27/005
    • A non-volatile semiconductor memory is disclosed, which comprises a plurality of memory cell arrays each having a number-of-rewrites storage region allocated to a portion of a corresponding cell array, and a number-of-rewrites write control circuit which stores the number of rewrites in cell transistors of the number-of-rewrites storage regions in non-selected memory cell arrays of the plurality of memory cell arrays by executing write of data to the cell transistors at a voltage lower than an ordinary write voltage so as to change a threshold value of the cell transistors in analog fashion according to an amount of electrons injected into floating gates of the cell transistors.
    • 公开了一种非易失性半导体存储器,其包括多个存储单元阵列,每个存储单元阵列具有分配给相应单元阵列的一部分的重写数量的存储区域,以及存储重写数量的写入控制电路 通过以比普通写入电压低的电压执行数据写入到单元晶体管,在多个存储单元阵列的未选择的存储单元阵列中重写存储区域数量的单元晶体管中的重写次数,以便 根据注入到单元晶体管的浮置栅极的电子量,以模拟方式改变单元晶体管的阈值。