Method of making a semiconductor memory device having error checking/correcting functions
US5262342A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 7, 1991 |
| Grant date | Nov 16, 1993 |
| Priority date | — |
| Expiry date | Oct 7, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/1076
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A semiconductor memory device having error checking/correcting functions includes a circuit (10) for generating a code for error checking/correcting based on information externally supplied and linking the information and the code to be transmitted to a memory cell array (1), and another circuit (11) for error checking and correcting read-out information from the information and the code which are read-out from the memory cell array so as to output correct read-out information. The code word generating circuit (10) and the error checking/correcting circuit (11) are formed of a masked ROM integrated on the same semiconductor chip (100) as that of the memory cell array (1) in the memory device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.