Invention Grant
- Patent Title: Apparatuses, systems, and methods for identifying victim rows in a memory device which cannot be simultaneously refreshed
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Application No.: US16997659Application Date: 2020-08-19
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Publication No.: US11348631B2Publication Date: 2022-05-31
- Inventor: Jun Wu , Yu Zhang , Dong Pan
- Applicant: MICRON TECHNOLOGY, INC.
- Applicant Address: US ID Boise
- Assignee: MICRON TECHNOLOGY, INC.
- Current Assignee: MICRON TECHNOLOGY, INC.
- Current Assignee Address: US ID Boise
- Agency: Dorsey & Whitney LLP
- Main IPC: G11C11/402
- IPC: G11C11/402 ; G11C11/406 ; G11C11/4096 ; G11C11/4091 ; G11C11/408

Abstract:
Apparatuses, systems, and methods for refresh modes. A memory may need to perform targeted refresh operations to refresh the ‘victim’ word lines which are near to frequently accessed ‘aggressor’ word lines. To refresh the victims at a high enough rate, it may be desirable to refresh multiple victims as part of the same refresh operation. However, certain word lines (e.g., word lines in a same section or adjacent sections of the memory) cannot be refreshed together. The memory may have a section comparator, which may check stored aggressor addresses and may provide a signal if there are not two stored addresses which can be refreshed together. Based, in part, on the signal, the memory may activate one of several different refresh modes, which may control the types of refresh operation performed responsive to a refresh signal.
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