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    • 1. 发明授权
    • Method and apparatus for real time two dimensional redundancy allocation
    • 用于实时二维冗余分配的方法和装置
    • US6026505A
    • 2000-02-15
    • US777877
    • 1991-10-16
    • Erik Leigh HedbergGarrett Stephen Koch
    • Erik Leigh HedbergGarrett Stephen Koch
    • G06F12/16G11C29/00G11C29/04G11C29/12G11C29/44G11C29/56G06F11/00
    • G11C29/72G11C29/44
    • A method and apparatus are provided in an array built in self test (ABIST) environment formed on a semiconductor chip having an array of memory cells arranged in columns and rows and column and row redundant lines which includes testing the array along the columns to identify a given number of faulty cells in each of the columns, storing the column addresses having the given number of faulty cells in first registers, further testing the array along the columns or rows to identify any additional faulty cells while masking the cells having the stored column addresses and storing the row addresses having the faulty cell in second registers until all of the second registers store row addresses, and after all of the second registers store row addresses, continue testing the array while masking the cells having the stored column or row addresses and storing the column addresses of any remaining additional faulty cell in any unused register of the first registers.
    • 一种方法和装置被提供在一个内置在自检(ABIST)环境中的阵列中,该阵列形成在半导体芯片上,该半导体芯片具有排列成列和行的存储单元阵列以及列和行冗余线,其包括沿着列测试阵列以识别 给定数量的每个列中的故障单元,将具有给定数量的故障单元的列地址存储在第一寄存器中,进一步沿列或行测试该阵列以识别任何附加的故障单元,同时掩蔽具有存储的列地址的单元 并且将具有故障单元的行地址存储在第二寄存器中,直到所有第二寄存器存储行地址,并且在所有第二寄存器存储行地址之后,继续测试阵列,同时屏蔽具有存储的列或行地址的单元并存储 第一个寄存器的任何未使用的寄存器中任何剩余的附加故障单元的列地址。