发明授权
US07701758B2 Nonvolatile memory device and control method thereof 有权
非易失性存储器件及其控制方法

  • 专利标题: Nonvolatile memory device and control method thereof
  • 专利标题(中): 非易失性存储器件及其控制方法
  • 申请号: US11771537
    申请日: 2007-06-29
  • 公开(公告)号: US07701758B2
    公开(公告)日: 2010-04-20
  • 发明人: Kiyoshi Nakai
  • 申请人: Kiyoshi Nakai
  • 申请人地址: JP Tokyo
  • 专利权人: Elpida Memory, Inc.
  • 当前专利权人: Elpida Memory, Inc.
  • 当前专利权人地址: JP Tokyo
  • 代理机构: Sughrue Mion, PLLC
  • 优先权: JP2006-187693 20060707
  • 主分类号: G11C11/00
  • IPC分类号: G11C11/00
Nonvolatile memory device and control method thereof
摘要:
To provide a nonvolatile memory including a word-line drive circuit that supplies a selective voltage to a selective transistor connected in series to a nonvolatile memory device. The word-line drive circuit applies a first selective voltage VDD to a control electrode of the selective transistor in a first period, and applies a second selective voltage VPP higher than the first selective voltage VDD to the control electrode of the selective transistor in a second period that follows the first period. Thereby, a current drive capability of the selective transistor is gradually changed. Thus, it becomes possible to limit the current drive capability of the selective transistor at timing at which snap-back is caused. As a result, an excessive current caused by the snap-back is suppressed, thereby reducing damage inflicted on the nonvolatile memory device.
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