Flexible redundancy for memories
AssigneeInfineon Technologies AG
InventorsNorbert Rehm, Thomas Roehr
Life of this patent
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Abstract
An improved redundancy scheme for a memory matrix is disclosed. The memory matrix a plurality of memory cells interconnected in first and second directions. The memory cells are grouped into memory elements. A redundant memory element having a plurality of redundant memory cells is provided. The redundant memory element is segmented into R sections in the first direction, wherein R is a whole number greater to or equal to 2. By segmenting the redundant element into R sections, it can be used to repair defects in up to R different memory elements.
Claims11
An integrated circuit having a memory matrix with a plurality memory cells interconnected in first and second directions, the memory matrix comprising:
- the plurality of memory cells grouped into a plurality of memory elements;
- at least one redundant memory element having a plurality of redundant memory cells;
- and
- R portions, where R is a whole number greater than or equal to 2, the R portions logically separating the redundant and memory elements into R segments, wherein a redundant segment can be used to repair one or more defective memory cells in one of the segments of the memory elements.
Dependencies are inferred from the claim text.