Apparatus and method for identifying memory cells for data refresh based on monitor cell in a resistive memory device
US10319437B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 20, 2017 |
| Grant date | Jun 11, 2019 |
| Priority date | — |
| Expiry date | Sep 20, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C2213/75
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Technology is described for identifying non-volatile memory cells having data that should be refreshed. The technology could be used to identify which groups of memory cells that store cold data should have a data refresh. In one aspect, a non-volatile storage device has at least one monitor memory cell associated with a group of data memory cells. The non-volatile storage device may use different programming techniques to program the data and monitor memory cells. In one aspect, the programming technique used for the monitor memory cell is less stable with respect to state than the technique used to program the associated data memory cells. The state of the monitor memory cell may change in a predictable manner, such that the state of the monitor cell may be sensed periodically to determine whether the associated data memory cells should be refreshed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.