Semiconductor memory device with redundancy responsive to advanced analysis
US5034925A · kind A · utility
23Cited by
1References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 27, 1989 |
| Grant date | Jul 23, 1991 |
| Priority date | — |
| Expiry date | Nov 27, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C8/10
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A semiconductor memory device of the type having redundant memory cells is capable of replacing defective memory cells with the redundant memory cells for providing a rescue, and the redundant memory cells are activated upon an access to one of the defective memory cells, however, the semiconductor memory device according to the present invention is responsive to an external controlling signal for forcibly canceling the replacement, so that the defective memory cells are accessible for trouble shooting after the replacement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.