Method of managing defects in flash disk memories
US5577194A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 7, 1995 |
| Grant date | Nov 19, 1996 |
| Priority date | — |
| Expiry date | Aug 7, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C2029/0409
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for monitoring the operations of a flash memory array divided into individually erasable blocks of memory in order to assure the integrity of data stored in the array in which each read or write operation is verified to detect an error which may have occurred in the operation including the steps of attempting at least one retry operation whenever an error occurs to determine whether the error is repeatable, marking the block to indicate valid data should be removed from the block if the error is found to be repeatable, removing the valid information from the block if the error is found to be repeatable, and removing a block with a repeatable error from operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.