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US 9,001,609 B2Granted
Hybrid latch and fuse scheme for memory repair
AssigneeInternational Business Machines Corporation
InventorsMichele M. Franceschini, Hillery C. Hunter, Charles A. Kilmer, Kyu-hyoun Kim, Luis A. Lastras-Montano
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Abstract
A method and apparatus for managing memory in an electronic system is described. The method includes determining a failure in an element of the memory array that is repairable by a redundant element. The method may further include using a latch to identify the redundant element. The method may also include that upon an event, using a value in the latch in an eFuse which subsequently selects the redundant element.
Claims12
A method of managing memory in an electronic system comprising:
- identifying a redundant element using a latch;
- determining whether the identified redundant element is available;
- determining a whether failure in an element of the memory array is repairable by the redundant element;
- upon an event, transferring a value from the latch to an eFuse, which subsequently selects the redundant element;
- storing failure information on a nonvolatile storage, the nonvolatile storage not being an eFuse;
- upon reboot, if the failure persists, burning an eFuse which is subsequently used to select the redundant element.
3 more elements
Dependencies are inferred from the claim text.