JPS5261933A - Memory unit - Google Patents

Memory unit

Info

Publication number
JPS5261933A
JPS5261933A JP50138979A JP13897975A JPS5261933A JP S5261933 A JPS5261933 A JP S5261933A JP 50138979 A JP50138979 A JP 50138979A JP 13897975 A JP13897975 A JP 13897975A JP S5261933 A JPS5261933 A JP S5261933A
Authority
JP
Japan
Prior art keywords
memory unit
memory cells
yield
added
improved
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
Application number
JP50138979A
Other languages
Japanese (ja)
Inventor
Tadahide Takada
Shunichi Suzuki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP50138979A priority Critical patent/JPS5261933A/en
Publication of JPS5261933A publication Critical patent/JPS5261933A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: In case very small number of faulty memory exists among many memory cells functioning correctly, auxiliary memory cells are added. As a result, the yield of LSI chip can be improved.
COPYRIGHT: (C)1977,JPO&Japio
JP50138979A 1975-11-18 1975-11-18 Memory unit Pending JPS5261933A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP50138979A JPS5261933A (en) 1975-11-18 1975-11-18 Memory unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP50138979A JPS5261933A (en) 1975-11-18 1975-11-18 Memory unit

Publications (1)

Publication Number Publication Date
JPS5261933A true JPS5261933A (en) 1977-05-21

Family

ID=15234631

Family Applications (1)

Application Number Title Priority Date Filing Date
JP50138979A Pending JPS5261933A (en) 1975-11-18 1975-11-18 Memory unit

Country Status (1)

Country Link
JP (1) JPS5261933A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1980002889A1 (en) * 1979-06-15 1980-12-24 Fujitsu Ltd Semiconductor memory device
WO1981000027A1 (en) * 1979-06-25 1981-01-08 Fujitsu Ltd Semiconductor memory device
DE3906897A1 (en) * 1988-03-04 1989-09-07 Mitsubishi Electric Corp Semiconductor memory device with improved redundancy circuit
JPH05135599A (en) * 1992-05-18 1993-06-01 Toshiba Corp Semiconductor memory device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1980002889A1 (en) * 1979-06-15 1980-12-24 Fujitsu Ltd Semiconductor memory device
US4473895A (en) * 1979-06-15 1984-09-25 Fujitsu Limited Semiconductor memory device
WO1981000027A1 (en) * 1979-06-25 1981-01-08 Fujitsu Ltd Semiconductor memory device
DE3906897A1 (en) * 1988-03-04 1989-09-07 Mitsubishi Electric Corp Semiconductor memory device with improved redundancy circuit
JPH05135599A (en) * 1992-05-18 1993-06-01 Toshiba Corp Semiconductor memory device

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