Marvell Israel (misl) Ltd.

Michael Levi

Yosef Solt

Reshef Bar Yoel

Yosef Haviv

A memory system includes an array of memory cells and a repair module. Multiple memory cells in the array are redundant to other memory cells in the array. The repair module iteratively tests the array. During the iterative testing of the array, the repair module, during each test of the array, (i) identifies one or more defective memory cells in the array, if any, and (ii) in response to one or more defective memory cells being identified during the test, respectively replaces the one or more defective memory cells with one or more memory cells that are redundant to other memory cells in the array. The repair module performs the iterative testing of the array until (i) the repair module does not detect a defective memory cell or (ii) no memory cells of the memory cells that are redundant remain available for replacement of a defective memory cell.

Method and system for iteratively testing and repairing an array of memory cells

A memory system includes an array of memory cells. The array of memory cells includes redundant memory cells. The redundant memory cells include at least two of a redundant row and a redundant column of memory cells. The repair module is configured to (i) identify at least two of a row and a column of the array of memory cells having non-operational memory cells and (ii) substitute the at least two of the row and the column of the array of memory cells with selected rows or columns of the redundant memory cells based on X predetermined sequences of substitutions. The repair module is configured to detect a failure in the array of memory cells that cannot be repaired using the X predetermined sequences of substitutions, and use an alternative repair sequence to repair the non-operational memory cells based on the detection of the failure.

Memory repair system and method

A self-repairing memory system includes memory including memory elements and redundant memory elements. The memory elements include a plurality of memory cells. A memory repair module identifies non-operational memory cells and selects at least one memory element including the non-operational memory cells. A first repair sub-circuit soft repairs the memory by substituting the selected memory elements with the redundant memory elements. A second repair sub-circuit hard repairs the memory based on the substitutions.

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Haifa, Israel

Michael Levi