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    • 28. 发明授权
    • NAND flash memory
    • NAND闪存
    • US07660157B2
    • 2010-02-09
    • US11873859
    • 2007-10-17
    • Hiroshi MaejimaKatsuaki Isobe
    • Hiroshi MaejimaKatsuaki Isobe
    • G11C11/34
    • G11C16/26G11C16/0483
    • A NAND flash memory, including a memory cell array, a row decoder, and a sense amplifier. In a read operation, a p-type semiconductor substrate is set at a ground potential, a bit line is charged to a first voltage, a source line, a n-type well and a p-type well are charged to a second voltage, which lies between a ground potential and a first voltage, and in a block not selected by the row decoder, a drain-side select gate line and the source-side select gate line are charged to a third voltage, which is higher than the ground potential and is equal to or lower than the second voltage.
    • 一种NAND闪存,包括存储单元阵列,行解码器和读出放大器。 在读取操作中,将p型半导体衬底设置为接地电位,将位线充电至第一电压,将源极线,n型阱和p型阱充电至第二电压, 位于接地电位和第一电压之间,并且在未被行解码器选择的块中,漏极侧选择栅极线和源极侧选择栅极线被充电到高于地的第三电压 并且等于或低于第二电压。
    • 30. 发明申请
    • NAND FLASH MEMORY
    • NAND闪存
    • US20110235417A1
    • 2011-09-29
    • US13154522
    • 2011-06-07
    • Katsuaki Isobe
    • Katsuaki Isobe
    • G11C16/02
    • G11C8/08G11C8/10G11C16/0483
    • A NAND flash memory that is read while a selected bit line and a non-selected bit line are adjacent to each other, has a memory cell array having a plurality of blocks each of which is composed of a plurality of memory cell units, each of said memory cell units having a plurality of electrically rewritable memory cells that are connected to each other and composed of a p-type well surrounded by an n-type well formed in a p-type semiconductor substrate, drain-side select gate transistors each of which connects a memory cell unit to a bit line and is connected to a drain-side select gate line at the gate thereof, and source-side select gate transistors each of which connects a memory cell unit to a source line and is connected to a source-side select gate line at the gate thereof; a row decoder that is connected to word lines, the drain-side select gate lines and the source-side gate line of said memory cell array, and applies a signal voltage to word lines, the drain-side select gate lines and the source-side gate line of said memory cell array for selecting a block; and a sense amplifier that is controlled by a column decoder and makes a selection from said bit lines of said memory cell array, wherein, in a block that is not selected by said row decoder, said bit line selected by said sense amplifier is charged in a state where the drain-side select gate line, the source-side select gate line and the p-type semiconductor substrate are set at a ground potential, and the source lines, the n-type wells, the p-type wells and a bit line that is not selected by said sense amplifier are in a floating state.
    • 在选择的位线和非选择的位线彼此相邻时读取的NAND快闪存储器具有存储单元阵列,其具有多个块,每个块由多个存储单元单元组成,每个块由多个存储单元单元组成 所述存储单元具有多个电可重写存储单元,它们彼此连接并且由形成在p型半导体衬底中的n型阱围绕的p型阱组成,每个漏极侧选择栅晶体管 其将存储单元单元连接到位线并连接到其栅极处的漏极侧选择栅极线,以及源极选择栅极晶体管,每个源极选择栅极晶体管将存储单元单元连接到源极线并连接到 源极选择栅极线; 连接到所述存储单元阵列的字线,漏极侧选择栅极线和源极侧栅极线的行解码器,并将信号电压施加到字线,漏极侧选择栅极线和源极侧选择栅极线, 所述存储单元阵列的侧栅极线用于选择块; 以及由列解码器控制并从所述存储单元阵列的所述位线进行选择的读出放大器,其中,在未被所述行解码器选择的块中,由所述读出放大器选择的所述位线被充电 漏极侧选择栅极线,源极侧选择栅极线和p型半导体衬底设置为接地电位的状态,源极线,n型阱,p型阱和a 未被所述读出放大器选择的位线处于浮置状态。