Techniques for reducing row hammer refresh
US10790005B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 26, 2019 |
| Grant date | Sep 29, 2020 |
| Priority date | — |
| Expiry date | Apr 26, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C2211/4068
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Methods, systems, and devices for techniques for reducing row hammer refresh are described. A memory device may be segmented into regions based on bits (e.g., the least significant bits) of row addresses such that consecutive word lines belong to different regions. A memory device may initiate a refresh operation for a first row of memory cells corresponding to a first word line. The memory device may determine that the first row is an aggressor row of a row hammer attack and may determine an adjacent row associated with a second word line as a victim row that may need to be refreshed (e.g., to counteract potential data corruption due to a row hammer attack). The memory die may determine whether to perform a row-hammer refresh operation on the victim row based on whether the victim row belongs to a region that is masked.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.