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    • 6. 发明授权
    • Semiconductor storage device provided with memory cell having charge accumulation layer and control gate
    • 设置有具有电荷累积层和控制栅极的存储单元的半导体存储装置
    • US07817468B2
    • 2010-10-19
    • US12365590
    • 2009-02-04
    • Katsuaki IsobeNoboru Shibata
    • Katsuaki IsobeNoboru Shibata
    • G11C11/34
    • G11C16/0483G11C11/5628G11C11/5635G11C16/12G11C16/16G11C16/3418
    • A semiconductor memory device includes memory cell transistors, a first selection transistor, and word lines. Each of the memory cell transistors has a stacked gate including a charge accumulation layer and a control gate, and is configured to retain at least two levels of “0” data and “1” data according to a threshold voltage. The threshold voltage corresponding to the “0” data being the lowest threshold voltage in the levels retained by each of the memory cell transistors. The first selection transistor has a current path connected in series to one of the memory cell transistors. Each of the word lines is connected to the control gate of one of the memory cell transistors. upper limit values of threshold voltages of the memory cell transistors retaining the “0” data being different from one another in each word line.
    • 半导体存储器件包括存储单元晶体管,第一选择晶体管和字线。 每个存储单元晶体管具有包括电荷累积层和控制栅极的堆叠栅极,并且被配置为根据阈值电压保持至少两个级别的“0”数据和“1”数据。 对应于“0”数据的阈值电压是由每个存储单元晶体管保持的电平中的最低阈值电压。 第一选择晶体管具有与存储单元晶体管之一串联连接的电流通路。 每个字线连接到存储单元晶体管之一的控制栅极。 保持“0”数据的存储单元晶体管的阈值电压的上限值在每个字线中彼此不同。
    • 7. 发明授权
    • Nonvolatile semiconductor memory device
    • 非易失性半导体存储器件
    • US08427885B2
    • 2013-04-23
    • US13315967
    • 2011-12-09
    • Hideo MukaiHiroshi MaejimaKatsuaki Isobe
    • Hideo MukaiHiroshi MaejimaKatsuaki Isobe
    • G11C7/10
    • G11C8/14G11C7/18G11C8/12G11C13/0004G11C13/0007G11C13/0011G11C13/0028G11C2213/31G11C2213/72
    • A nonvolatile-semiconductor-memory-device including a cell array having a plurality of MATs (unit-cell-array) disposed in a matrix, the MATs each include a plurality of first lines, a plurality of second lines crossing the first lines, and memory cells being connected between the first and second lines. The device further includes a first and second drive circuit selecting the first and second lines connected to the memory cells of each MAT that are accessed, and driving the selected first and second lines to write or read data. The memory cells form a page by being connected to each first line selected from the MATs. The device also includes a data latch latching the write or the read data in units of pages, where the first and second drive circuit drive the first and second lines multiple times to write or read data for one page in and out of the cell array.
    • 一种非易失性半导体存储器件,包括具有以矩阵形式设置的多个MAT(单位阵列)的单元阵列,所述MAT各包括多条第一线,与第一线交叉的多条第二线,以及 存储单元连接在第一和第二线之间。 该装置还包括第一和第二驱动电路,选择连接到每个MAT的存储器单元的第一和第二线,所述存储器单元被访问,并且驱动所选择的第一和第二行来写入或读取数据。 存储单元通过连接到从MAT中选择的每个第一行形成页面。 该设备还包括以页为单位锁存写入或读取数据的数据锁存器,其中第一和第二驱动电路多次驱动第一和第二行以写入或读取单元阵列中的一页的数据。