Self-repairing technique in nano-scale SRAM to reduce parametric failures
    1.
    发明授权
    Self-repairing technique in nano-scale SRAM to reduce parametric failures 失效
    纳米级SRAM中的自修复技术可减少参数故障

    公开(公告)号:US07508697B1

    公开(公告)日:2009-03-24

    申请号:US11746448

    申请日:2007-05-09

    IPC分类号: G11C11/00

    摘要: A self-repairing SRAM and a method for reducing parametric failures in SRAM. On-chip leakage or delay monitors are employed to detect inter-die Vt process corners, in response to which the SRAM applies adaptive body bias to reduce the number of parametric failures in a die and improve memory yield. Embodiments include circuitry for applying reverse body bias (RBB) to the SRAM array in the presence of a low inter-die Vt process corner, thereby reducing possible read and hold failures, and applying forward body bias (FBB) to the array in the presence of a high inter-die Vt process corner, thereby reducing possible access and write failures.

    摘要翻译: 一种自修复SRAM和一种减少SRAM中参数故障的方法。 采用片内泄漏或延迟监测器来检测晶片间Vt过程角,响应于此,SRAM应用自适应体偏置以减少管芯中参数故障的数量并提高记忆产量。 实施例包括用于在存在低的晶片间Vt处理角的情况下将反向偏置(RBB)施加到SRAM阵列的电路,从而减少可能的读取和保持故障,并且在存在时向阵列应用前向偏置(FBB) 的高间隔Vt处理角,从而减少可能的访问和写入失败。