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    • 62. 发明专利
    • Semiconductor storage device and control method for the same
    • 半导体存储器件及其控制方法
    • JP2012027988A
    • 2012-02-09
    • JP2010166489
    • 2010-07-23
    • Toshiba Corp株式会社東芝
    • TAKEKIDA HIDEHITO
    • G11C16/06G11C16/04
    • G11C16/0483G11C16/10G11C16/3418
    • PROBLEM TO BE SOLVED: To provide a semiconductor storage device which allows sufficient current to flow in a non-selected cell adjacent to a selected cell.SOLUTION: In a semiconductor storage device, gates of nonvolatile memory cells serially connected in the row direction are connected to word lines in the column direction. When data is read, a first read pass voltage is applied to a first adjacent word line adjacent to the selected word line, a second read pass voltage higher than the first read pass voltage is applied to a second adjacent word line adjacent to the opposing side of the selected word line of the first adjacent word line, and a third read pass voltage which is higher than the first read pass voltage and lower than the second read pass voltage is applied to the other non-selected word lines.
    • 要解决的问题:提供一种半导体存储装置,其允许足够的电流在与所选择的单元相邻的未选择的单元中流动。 解决方案:在半导体存储装置中,沿行方向串联连接的非易失性存储单元的栅极在列方向上连接到字线。 当读取数据时,将第一读取通过电压施加到与所选择的字线相邻的第一相邻字线,将高于第一读取通过电压的第二读取通过电压施加到与相对侧相邻的第二相邻字线 的第一相邻字线的选定字线和比第一读通过电压高且低于第二读通过电压的第三读通过电压被施加到其他未选择的字线。 版权所有(C)2012,JPO&INPIT
    • 70. 发明专利
    • Nonvolatile semiconductor memory device
    • 非易失性半导体存储器件
    • JP2011210338A
    • 2011-10-20
    • JP2010079832
    • 2010-03-30
    • Toshiba Corp株式会社東芝
    • IWAI MAKOTO
    • G11C16/02G11C16/06
    • G11C16/0483G11C16/10G11C16/3418
    • PROBLEM TO BE SOLVED: To provide a nonvolatile semiconductor device in which the reliability of a memory cell is improved without using an operational amplifier.SOLUTION: According to one embodiment, the nonvolatile semiconductor memory device includes: a memory cell array 10 including a plurality of memory cells; a plurality of word lines WL each connected in common to the memory cells arranged in a row direction of the plurality of memory cells and ; a voltage generator 13 including a clock signal cycle controller 22 configured to lengthen a cycle of a clock signal each time writing is performed at a stepped-up program voltage to the memory cells connected to a selected word line, and also being configured to generate a desired output voltage by using the clock signal. The clock signal cycle controller 22 controls in such a way that a boosting rate for writing at the stepped-up program voltage is kept nearly equal to the boosting rate for writing at an initial program voltage.
    • 要解决的问题:提供一种在不使用运算放大器的情况下提高存储单元的可靠性的非易失性半导体器件。解决方案:根据一个实施例,非易失性半导体存储器件包括:存储单元阵列10,包括多个 记忆细胞; 多个字线WL,其共同地连接到沿多个存储单元的行方向排列的存储单元; 电压发生器13,包括时钟信号周期控制器22,其被配置为每当以升压编程电压执行向连接到所选字线的存储器单元执行写入时延长时钟信号的周期,并且还被配置为: 通过使用时钟信号来获得所需的输出电压。 时钟信号周期控制器22以这样的方式进行控制,使得用于在升压编程电压下的写入的升压速率几乎等于在初始编程电压下进行写入的升压速率。