NAND-cell type electrically erasable and programmable read-only memory
with redundancy circuit
    6.
    发明授权
    NAND-cell type electrically erasable and programmable read-only memory with redundancy circuit 失效
    具有冗余电路的NAND单元型电可擦除可编程只读存储器

    公开(公告)号:US5278794A

    公开(公告)日:1994-01-11

    申请号:US960882

    申请日:1992-10-14

    摘要: A NAND-cell type electrically erasable and programmable read only memory includes an array of rows and columns of memory cells associated with parallel bit lines on a semiconductive substrate. Each memory cell essentially consists of a floating-gate field effect transistor having a floating gate and an insulated control gate. The memory cell array is divided into a plurality of cell blocks, each of which includes NAND cell sections each including a predetermined number of a series-connected memory cell transistors. A redundancy cell section is provided which includes an array of redundancy memory cells containing at least one spare cell block. A row redundancy circuit is connected to a row decoder, and is responsive to an address buffer. The redundancy circuit replaces a defective block containing a defective memory cell or cells with the spare cell block.

    摘要翻译: NAND单元型电可擦除和可编程只读存储器包括与半导体基板上的并行位线相关联的存储单元的行和列阵列。 每个存储单元基本上由具有浮置栅极和绝缘控制栅极的浮栅场效应晶体管组成。 存储单元阵列被分成多个单元块,每个单元块包括每个包括预定数量的串联存储单元晶体管的NAND单元部分。 提供冗余单元部分,其包括包含至少一个备用单元块的冗余存储单元的阵列。 行冗余电路连接到行解码器,并响应于地址缓冲器。 冗余电路用备用单元块替代含有缺陷存储单元或单元的缺陷块。