发明授权
US08400839B2 Nonvolatile memory and method for compensating during programming for perturbing charges of neighboring cells 有权
非易失性存储器和用于在编程期间补偿相邻电池的扰动电荷的方法

  • 专利标题: Nonvolatile memory and method for compensating during programming for perturbing charges of neighboring cells
  • 专利标题(中): 非易失性存储器和用于在编程期间补偿相邻电池的扰动电荷的方法
  • 申请号: US13029787
    申请日: 2011-02-17
  • 公开(公告)号: US08400839B2
    公开(公告)日: 2013-03-19
  • 发明人: Yan Li
  • 申请人: Yan Li
  • 申请人地址: US CA Milpitas
  • 专利权人: SanDisk Corporation
  • 当前专利权人: SanDisk Corporation
  • 当前专利权人地址: US CA Milpitas
  • 代理机构: Davis Wright Tremaine LLP
  • 主分类号: G11C16/04
  • IPC分类号: G11C16/04
Nonvolatile memory and method for compensating during programming for perturbing charges of neighboring cells
摘要:
Shifts in the apparent charge stored on a charge storing element of a non-volatile memory cell can occur because of the coupling of an electric field based on the charge stored in adjacent charge storing elements. To compensate for this coupling, the programming process for a given memory cell can take into account the target programmed state of one or more adjacent memory cell. The amount of programming is verified after each programming pulse and the standard verify level for the programming cell is dependent on the target state. The verify level is further offset lower dependent on the amount of perturbation from neighboring cells, determinable by their target states. The verify level is preferably virtually offset by biasing adjacent word lines instead of actually offsetting the standard verify level. For soft-programming erased cells, neighboring cells on both adjacent word lines are taken into account.
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