Patent ID: 11935610
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 8:
9. A memory device, comprising:
an array of memory cells including data memory cells actively used for storing data and backup memory cells;
memory configured to store a repair table that records a number of entries indicating which of the data memory cells which have been replaced by a backup memory cell that is designated as an activated data memory cell to be used for actively storing data; and
a controller configured, in response to detecting that a first data memory cell has a higher failure count than a lowest failure count of a replaced memory cell recorded in the repair table, to update an entry of the replaced memory cell in the repair table with information of the data memory cell, and in response to update the entry, transfer the replaced memory cell to a restored data memory cell.