US4922459A
Expired / Lapsed
US
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Dynamic semiconductor memory device
Assignee: Mitsubishi Electric Corp
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Filing: 1988-08-25
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Granted: 1990-05-01
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Expires: 2008-08-25
Abstract
Abstract A group of alternate bit line pairs out of a plurality of bit line pairs has an intersecting portion at a second equally divided point out of three equally divided points obtained by dividing the bit line pair into four equal divisions in the longitudinal direction. Another group of alternate bit line pairs out of the plurality of bit line pairs has intersecting portions at first and third equally divided points out of three equally divided points obtained by dividing the bit line pair into four equal divisions in the longitudinal direction. Between the paired bit lines in each of the bit line pairs, one or the other of paired bit lines in another bit line pair is arranged.
Inventors
- 👤 Hideto Hidaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:32
CPC Classifications
G; G11; G11C; G11C11/00; G11C11/21; G11C11/34; G11C11/40; G11C11/401; G11C11/4063; G11C11/407; G11C11/409; G11C11/4097
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
132 words
A semiconductor memory device, comprising: a plurality of paired bit lines, a plurality of sense amplifiers each coupled to a respective pair of said plurality of paired bit lines for detecting the potential difference between said paired bit lines, at least one bit line of each of said plurality of paired bit lines having at least one portion intersecting with and overlapping a bit line of an adjacent paired bit line, a plurality of word lines arranged intersecting with said plurality of paired bit lines, a plurality of memory cells located at intersections of said plurality of paired bit lines and said plurality of word lines, respectively, and cancelling means comprising the overlapping bit lines at said at least one portion for cancelling noises of capacitive coupling between said paired bit lines.
Claim 2
Dependent Claim
132 words
A semiconductor memory device, comprising: a plurality of paired bit lines, a plurality of sense amplifiers each coupled to a respective pair of said plurality of paired bit lines for detecting the potential difference between said paired bit lines, at least one bit line of each of said plurality of paired bit lines having at least one portion intersecting with and overlapping a bit line of an adjacent paired bit line, a plurality of word lines arranged intersecting with said plurality of paired bit lines, a plurality of memory cells located at intersections of said plurality of paired bit lines and said plurality of word lines, respectively, and cancelling means comprising the overlapping bit lines at said at least one portion for cancelling noises of capacitive coupling between said paired bit lines.
Claim 3
Dependent Claim
195 words
A semiconductor memory device comprising: a plurality of bit line pairs each comprising paired bit lines, each of said plurality of bit line pairs having one or a plurality of intersecting portions in which said paired bit lines intersect with each other, a plurality of word lines arranged intersecting with said plurality of bit line pairs, a plurality of memory cells located at intersections of said plurality of bit line pairs and said plurality of word lines, respectively, and cancelling means for cancelling noises of capacitive coupling between said paired bit lines, a group of alternate bit line pairs out of said plurality of bit line pairs having said intersecting portion or portions at equally divided point or points in even numbers out of odd equally divided points obtained by equally dividing the bit line pair into even divisions in the longitudinal direction, and another group of alternate bit line pairs out of said plurality of bit line pairs having said intersecting portion or portions at equally divided point or points in odd numbers out of odd equally divided points obtained by equally dividing the bit line pair into even divisions in the longitudinal direction.
Claim 4
Dependent Claim
195 words
A semiconductor memory device comprising: a plurality of bit line pairs each comprising paired bit lines, each of said plurality of bit line pairs having one or a plurality of intersecting portions in which said paired bit lines intersect with each other, a plurality of word lines arranged intersecting with said plurality of bit line pairs, a plurality of memory cells located at intersections of said plurality of bit line pairs and said plurality of word lines, respectively, and cancelling means for cancelling noises of capacitive coupling between said paired bit lines, a group of alternate bit line pairs out of said plurality of bit line pairs having said intersecting portion or portions at equally divided point or points in even numbers out of odd equally divided points obtained by equally dividing the bit line pair into even divisions in the longitudinal direction, and another group of alternate bit line pairs out of said plurality of bit line pairs having said intersecting portion or portions at equally divided point or points in odd numbers out of odd equally divided points obtained by equally dividing the bit line pair into even divisions in the longitudinal direction.
Claim 5
Dependent Claim
33 words
The semiconductor memory device according to claim 2, wherein said group of alternate bit line pairs out of said plurality of bit line pairs further has said intersecting portion in one end thereof.
Claim 6
Dependent Claim
203 words
A semiconductor memory device comprising: a plurality of bit line pairs each comprising paired bit lines, a group of alternate bit line pairs out of said plurality of bit line pairs having intersecting portion or portions in which said paired bit lines intersect with each other at equally divided point or points in even numbers out of odd equally divided points obtained by equally dividing the bit line pair into even numbers in the longitudinal direction, another group of alternate bit line pairs out of said plurality of bit line pairs having intersecting portion or portions in which said paired bit lines intersect with each other at equally divided point or points in odd numbers out of odd equally divided points obtained by equally dividing the bit line pair into even divisions in the longitudinal direction, between said paired bit lines in each of said plurality of bit line pairs, one or the other of said paired bit lines in another bit line pair being arranged, a plurality of word lines arranged intersecting with said plurality of bit line pairs, and a plurality of memory cells located at intersections of said plurality of bit line pairs and said plurality of word lines, respectively.
Claim 7
Dependent Claim
203 words
A semiconductor memory device comprising: a plurality of bit line pairs each comprising paired bit lines, a group of alternate bit line pairs out of said plurality of bit line pairs having intersecting portion or portions in which said paired bit lines intersect with each other at equally divided point or points in even numbers out of odd equally divided points obtained by equally dividing the bit line pair into even numbers in the longitudinal direction, another group of alternate bit line pairs out of said plurality of bit line pairs having intersecting portion or portions in which said paired bit lines intersect with each other at equally divided point or points in odd numbers out of odd equally divided points obtained by equally dividing the bit line pair into even divisions in the longitudinal direction, between said paired bit lines in each of said plurality of bit line pairs, one or the other of said paired bit lines in another bit line pair being arranged, a plurality of word lines arranged intersecting with said plurality of bit line pairs, and a plurality of memory cells located at intersections of said plurality of bit line pairs and said plurality of word lines, respectively.
Claim 8
Dependent Claim
38 words
The semiconductor memory device according to claim 4, which further comprises a plurality of sense amplifiers each provided corresponding to each of said plurality of bit line pairs for detecting the potential difference between said paired bit lines.
Claim 9
Dependent Claim
86 words
The semiconductor memory device according to claim 4, which further comprises a plurality of sense amplifiers each provided in one end of said group of alternate bit line pairs out of said plurality of bit line pairs for detecting the potential difference between said paired bit lines, and a plurality of sense amplifiers each provided in the other end of said other group of alternate bit line pairs out of said plurality of bit line pairs for detecting the potential difference between said paired bit lines.
Claim 10
Dependent Claim
43 words
The semiconductor memory device according to claim 6, wherein said group of alternate bit line pairs out of said plurality of bit line pairs further has an intersecting portion in which said paired bit lines intersect with each other in one end thereof.
Claim 11
Dependent Claim
43 words
The semiconductor memory device according to claim 4, wherein said group of alternate bit line pairs out of said plurality of bit line pairs further has an intersecting portion in which said paired bit lines intersect with each other in one end thereof.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-04-30 | 1993-10-30 | 1994-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-30 | 1997-10-30 | 1998-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-30 | 2001-10-30 | 2002-05-01 | $7700.00 | Window Closed / Lapsed |