JPS57115860A - Semiconductor memory device - Google Patents

Semiconductor memory device

Info

Publication number
JPS57115860A
JPS57115860A JP56002497A JP249781A JPS57115860A JP S57115860 A JPS57115860 A JP S57115860A JP 56002497 A JP56002497 A JP 56002497A JP 249781 A JP249781 A JP 249781A JP S57115860 A JPS57115860 A JP S57115860A
Authority
JP
Japan
Prior art keywords
column
columns
index
array
cells
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
JP56002497A
Other languages
Japanese (ja)
Inventor
Kenji Anami
Yasuharu Nagayama
Koichiro Masuko
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP56002497A priority Critical patent/JPS57115860A/en
Publication of JPS57115860A publication Critical patent/JPS57115860A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C5/00—Details of stores covered by group G11C11/00

Landscapes

  • Semiconductor Integrated Circuits (AREA)
  • Semiconductor Memories (AREA)

Abstract

PURPOSE:To perform retrieval for a specified column or row efficiently by a method wherein in a memory array which has a plurality of memory cells having an arbitrary number of bits arranged along a column or row direction, through a mark or the like provided at each plural number of columns or rows of the cells, visual judgement can be enabled. CONSTITUTION:On memory cells 1a and 1b which are arranged by 1 bit or 2 bit arranged at linearly symetrical position along a shaft of a column or row direction or 4 bit arranged at linearly symetrical position along a shaft of a column or row direction, an irregularity in form which is visually discernible is formed. Next by a plurality of these cells 1a and 1b arranged along the column direction a memory array 2 is built, and a column region of array 3a among column regions of array 3a and 3b which consist of one or several number of columns is used as an index for discernment, and the indexes are provided at each specified number of columns. In this arrangement, an index is provided in such a way that the shape of the cell is changed or a slit is notched or a mark is provided. By this method using the column region 3a as an index, the retrieval of a specified column region 3a or 3b is performed.
JP56002497A 1981-01-10 1981-01-10 Semiconductor memory device Pending JPS57115860A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56002497A JPS57115860A (en) 1981-01-10 1981-01-10 Semiconductor memory device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56002497A JPS57115860A (en) 1981-01-10 1981-01-10 Semiconductor memory device

Publications (1)

Publication Number Publication Date
JPS57115860A true JPS57115860A (en) 1982-07-19

Family

ID=11530989

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56002497A Pending JPS57115860A (en) 1981-01-10 1981-01-10 Semiconductor memory device

Country Status (1)

Country Link
JP (1) JPS57115860A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5885562A (en) * 1981-11-18 1983-05-21 Nec Corp Semiconductor device
JPS58182262A (en) * 1982-04-19 1983-10-25 Hitachi Ltd Semiconductor integrated circuit device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5146067B2 (en) * 1972-02-10 1976-12-07
JPS5278389A (en) * 1975-12-24 1977-07-01 Fujitsu Ltd Semiconductor memory device
JPS5311958B2 (en) * 1974-02-08 1978-04-25
JPS5390763A (en) * 1977-01-19 1978-08-09 Hitachi Ltd Semiconductor element and mask for producing semiconductor element

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5146067B2 (en) * 1972-02-10 1976-12-07
JPS5311958B2 (en) * 1974-02-08 1978-04-25
JPS5278389A (en) * 1975-12-24 1977-07-01 Fujitsu Ltd Semiconductor memory device
JPS5390763A (en) * 1977-01-19 1978-08-09 Hitachi Ltd Semiconductor element and mask for producing semiconductor element

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5885562A (en) * 1981-11-18 1983-05-21 Nec Corp Semiconductor device
JPS58182262A (en) * 1982-04-19 1983-10-25 Hitachi Ltd Semiconductor integrated circuit device

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