Non-volatile semiconductor memory device conducting data write and erase operations based on a prescribed unit region
US6529418B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 24, 2001 |
| Grant date | Mar 4, 2003 |
| Priority date | — |
| Expiry date | Sep 24, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C16/10
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A normal array for storing data in a non-volatile manner is divided into m sectors each corresponding to a unit subjected to a single data write or erase operation (where m is a natural number). An extra memory array includes a plurality of extra sectors each corresponding to a unit subjected to a single data read operation. The number of extra sectors is equal to or smaller than m. Each extra sector stores the data of the data write conditions or erase conditions corresponding to one of the m sectors in a non-volatile manner. The data write operation or erase operation is conducted based on the information corresponding to a selected sector, which is read from the extra memory array.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.