Detection of memory cells that are stuck in a physical state
US9104568B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 15, 2013 |
| Grant date | Aug 11, 2015 |
| Priority date | — |
| Expiry date | Nov 27, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C16/00
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for detecting memory cells that are stuck in a physical state. The method includes performing a diagnostic read of a memory cell in a memory system. The memory system is configured to utilize at least one read threshold value to determine a read data value stored in the memory cell when performing a data read operation on the memory cell. Performing the diagnostic read includes: comparing a measurement property of the memory cell to at least one diagnostic threshold value, where at least one of the diagnostic threshold values is different from all of the read threshold values; and identifying the memory cell as being stuck in a physical state based on the comparing. Based on identifying the memory cell as being stuck in a physical state, an indication that memory cell is stuck is output along with a diagnostic data value associated with the physical state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.