Invention Grant
US08031516B2 Writing memory cells exhibiting threshold switch behavior 有权
编写显示阈值开关行为的存储单元

  • Patent Title: Writing memory cells exhibiting threshold switch behavior
  • Patent Title (中): 编写显示阈值开关行为的存储单元
  • Application No.: US12333518
    Application Date: 2008-12-12
  • Publication No.: US08031516B2
    Publication Date: 2011-10-04
  • Inventor: Stephen Tang
  • Applicant: Stephen Tang
  • Agency: Trop, Pruner & Hu, P.C.
  • Main IPC: G11C11/00
  • IPC: G11C11/00
Writing memory cells exhibiting threshold switch behavior
Abstract:
A memory cell exhibiting threshold switch behavior, such as a phase change memory, can be programmed in a way that eliminates the need for a separate post-programming verification cycle. In particular, a circuit can be used to apply the programming pulse to a cell in a way that determines whether the cell has reached the desired threshold voltage. If the cell has not reached the desired threshold voltage, it receives another programming pulse. If it has, it does not receive another programming pulse. Thus, by applying a voltage across the cell that never exceeds the threshold voltage of the cell, the need for a separate verification cycle can be eliminated in some embodiments.
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