JPS648590A - Semiconductor memory - Google Patents
Semiconductor memoryInfo
- Publication number
- JPS648590A JPS648590A JP62162308A JP16230887A JPS648590A JP S648590 A JPS648590 A JP S648590A JP 62162308 A JP62162308 A JP 62162308A JP 16230887 A JP16230887 A JP 16230887A JP S648590 A JPS648590 A JP S648590A
- Authority
- JP
- Japan
- Prior art keywords
- information
- chip
- memory cell
- check
- defect
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- For Increasing The Reliability Of Semiconductor Memories (AREA)
- Dram (AREA)
- Techniques For Improving Reliability Of Storages (AREA)
Abstract
PURPOSE:To accurately check the characteristics of a chip such as information holding characteristic by establishing a correspondence between external information internal information even for a defect relieving chip. CONSTITUTION:When a defect in relieved inside in the chip, a circuit deciding whether a replaced memory cell MC is connected to the same data line or the data lines in pairs is provided and write information in the memory cell MC is controlled by using the output of the discrimination circuit. For example, even when a word line W1 or W2 is replaced to redundant word line, since the write information is inverted, the information is written so as to be at a high potential in the node of the redundancy memory cell in writing the information to bring the node in the normal cell to a high potential to apply the check of the chip correctly. Since the correspondence between the external information and internal information is taken in the defect relieving chip, the check of the information holding characteristic is conducted correctly.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62162308A JP2602506B2 (en) | 1987-07-01 | 1987-07-01 | Semiconductor memory |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62162308A JP2602506B2 (en) | 1987-07-01 | 1987-07-01 | Semiconductor memory |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS648590A true JPS648590A (en) | 1989-01-12 |
JP2602506B2 JP2602506B2 (en) | 1997-04-23 |
Family
ID=15752042
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62162308A Expired - Lifetime JP2602506B2 (en) | 1987-07-01 | 1987-07-01 | Semiconductor memory |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2602506B2 (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59152597A (en) * | 1983-02-18 | 1984-08-31 | Nec Corp | Memory circuit |
-
1987
- 1987-07-01 JP JP62162308A patent/JP2602506B2/en not_active Expired - Lifetime
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59152597A (en) * | 1983-02-18 | 1984-08-31 | Nec Corp | Memory circuit |
Also Published As
Publication number | Publication date |
---|---|
JP2602506B2 (en) | 1997-04-23 |
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