JPS55105898A - Semiconductor memory device - Google Patents
Semiconductor memory deviceInfo
- Publication number
- JPS55105898A JPS55105898A JP1110479A JP1110479A JPS55105898A JP S55105898 A JPS55105898 A JP S55105898A JP 1110479 A JP1110479 A JP 1110479A JP 1110479 A JP1110479 A JP 1110479A JP S55105898 A JPS55105898 A JP S55105898A
- Authority
- JP
- Japan
- Prior art keywords
- word line
- decoder
- relief
- array
- defective bit
- 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.)
- Pending
Links
Landscapes
- Techniques For Improving Reliability Of Storages (AREA)
- For Increasing The Reliability Of Semiconductor Memories (AREA)
Abstract
PURPOSE: To secure the relief for the defective bit without an extreme increment of the area or the lowering of the operation speed, by incorporating the relief circuit for defective bit within the decoder which decodes the input address.
CONSTITUTION: When the function test is given to cell array 21 after completion of the IC memory, addresses A0WAn are supplied to word line selection decoder 23. In this case, for word line switch circuit 25, the conduction is secured for the word line connecting to array 21 from decoder 23. Thus the defective bit within array 21 can be identified. However, no selection is always given to the word line connecting to relief cell array 22 from relief decoder 24. After execution of such function test, the connection to decoder 23 is cut off by circuit 25 for the specified word line. Otherwise the connection is given only to the word line containing no defective bit. In addition, for the connection within decoder 24, the selection is secured for the word line containing array 22.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1110479A JPS55105898A (en) | 1979-02-02 | 1979-02-02 | Semiconductor memory device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1110479A JPS55105898A (en) | 1979-02-02 | 1979-02-02 | Semiconductor memory device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55105898A true JPS55105898A (en) | 1980-08-13 |
Family
ID=11768695
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1110479A Pending JPS55105898A (en) | 1979-02-02 | 1979-02-02 | Semiconductor memory device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55105898A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57130298A (en) * | 1981-02-06 | 1982-08-12 | Hitachi Ltd | Semiconductor integrated circuit memory and relieving method for its fault |
JPS59151399A (en) * | 1983-02-17 | 1984-08-29 | Mitsubishi Electric Corp | Semiconductor storage device |
JPS59185099A (en) * | 1984-02-28 | 1984-10-20 | Toshiba Corp | Nonvolatile semiconductor memory |
-
1979
- 1979-02-02 JP JP1110479A patent/JPS55105898A/en active Pending
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57130298A (en) * | 1981-02-06 | 1982-08-12 | Hitachi Ltd | Semiconductor integrated circuit memory and relieving method for its fault |
JPS6135637B2 (en) * | 1981-02-06 | 1986-08-14 | Hitachi Ltd | |
JPS59151399A (en) * | 1983-02-17 | 1984-08-29 | Mitsubishi Electric Corp | Semiconductor storage device |
JPH0463479B2 (en) * | 1983-02-17 | 1992-10-09 | Mitsubishi Electric Corp | |
JPS59185099A (en) * | 1984-02-28 | 1984-10-20 | Toshiba Corp | Nonvolatile semiconductor memory |
JPS6240797B2 (en) * | 1984-02-28 | 1987-08-31 | Tokyo Shibaura Electric Co |
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