发明授权
US07986572B2 Magnetic memory capable of minimizing gate voltage stress in unselected memory cells 有权
能够最小化未选择的存储单元中的栅极电压应力的磁存储器

  • 专利标题: Magnetic memory capable of minimizing gate voltage stress in unselected memory cells
  • 专利标题(中): 能够最小化未选择的存储单元中的栅极电压应力的磁存储器
  • 申请号: US12583255
    申请日: 2009-08-17
  • 公开(公告)号: US07986572B2
    公开(公告)日: 2011-07-26
  • 发明人: Hsu Kai Yang
  • 申请人: Hsu Kai Yang
  • 申请人地址: US CA Milpitas
  • 专利权人: MagIC Technologies, Inc.
  • 当前专利权人: MagIC Technologies, Inc.
  • 当前专利权人地址: US CA Milpitas
  • 代理机构: Saile Ackerman LLC
  • 代理商 Stephen B. Ackerman; Larry J. Prescott
  • 主分类号: G11C7/00
  • IPC分类号: G11C7/00
Magnetic memory capable of minimizing gate voltage stress in unselected memory cells
摘要:
Magnetic memory elements such as Phase Change RAM and Spin Moment Transfer MRAM require high programming currents. These high programming currents require high gate to source/drain voltages for the cell transistors controlling these programming currents, which can degrade the reliability of these cell transistors. This invention describes a circuit and method to write information into individual memory cells while minimizing the gate voltage stress in the cell transistors of the memory cells in which no information is being written. The circuit of this invention has a separately controllable word line voltage supply for each row of the memory array and a separately controllable voltage supply for each bit line of the memory array. During the write operation the voltage is raised for the word line of only one row of the array. The bit line voltages are then adjusted so that a 1 is written into the desired cells in that row and a 0 is written into the desired cells in that row.
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