Non-volatile storage with processive writes
US11482292B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 23, 2021 |
| Grant date | Oct 25, 2022 |
| Priority date | — |
| Expiry date | Jun 23, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C2211/5648
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A non-volatile storage system includes a control circuit connected to non-volatile memory cells provides for progressive writing of data. That is, existing data is overwritten by new data without performing a traditional erase operation that changes the threshold voltage of the memory cells back to the traditional or original erase state. In one example, new data is written on top of old data using shifted threshold voltage distributions. Some embodiments include writing MLC data over SLC data, using intermediate erase threshold voltage distributions and/or automatically detecting which threshold voltage distributions are currently being used to store data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.