Memory bit level repairing method

Abstract

The invention provides a memory bit level repairing method. The method comprises the following steps of: firstly, providing a memory with a plurality of memory bytes; wherein each memory byte containsM bits; M is a positive integer; relative to the memory bytes, additional repair bytes, wherein N repairing positions are contained for repairing; N is also a positive integer, and N is less than M;detecting whether all memory bytes and repair bytes have poor bits or not; and if the memory bytes do not have the same number as that of the memory bytes, finishing the repair of the memory, and if all the memory bytes and repair bytes having the same number as those of the memory bytes correspond to the number of the memory bytes having the same number as that of the memory bytes and substitutethe memory bytes and the repair bytes to all the memory bytes having the same number as that of the self-repair bytes. The invention provides a method for simply and quickly repairing memory bits, which can reduce the number of redundant memory bits for repairing the memory bits.

Description

technical field [0001] The present invention relates to a method for repairing defective memory components, in particular to a method for repairing memory bit levels. Background technique [0002] Now in chip design, for various types of memory, such as random access memory (Random Access Memory, RAM), read-only memory (Read-Only Memory, ROM), non-volatile memory (Non-Volatile Memory, NVRAM), dynamic random The demand for chip memory such as Dynamic Random Access Memory (DRAM), Embedded Flash (Embedded Flash) or Embedded DRAM (Embedded DRAM) is increasing day by day. No matter what kind of product it is, the quality, reliability or cost Maintenance, for manufacturers, is an important knowledge. In the chip memory, repeated and reliable inspection and repair must be carried out for the memory components in the chip, so as to improve the reliability of future products and improve the quality of the chip. and competitiveness. [0003] In traditional repair methods, such as er...

AI Technical Summary

Problems solved by technology

In the repairing method, except that the number of bits used for repairing is very large, because the bit address used for comparison and the address of the fuse array are used to store defects, the number of groups used to repair is usually very small, but for If the bit density in the repair group is too large, one bit may be damaged, and all the bits in the group must be replaced, so that this repair method will also consume too many bits

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