Patent US4319342A successfully refreshed from Google Patents.
US4319342A
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One device field effect transistor (FET) AC stable random access memory (RAM) array
Assignee: International Business Machines Corp
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Filing: 1979-12-26
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Granted: 1982-03-09
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Expires: 1999-12-26
Abstract
Abstract Disclosed is an integrated circuit electrode memory array having a plurality of FET memory cells arranged in rows and columns and formed on the same integrated circuit chip with associated support circuits. Each memory cell of the array has a capacitive storage region, an adjacent channel region, and a gate region for controlling the transfer of binary information through the channel region in and out of the capacitive storage region. Each memory cell also has a bit line contact region which is shared with an adjacent memory cell. The word lines are arranged in rows in a substantially equidistant parallel relationship, each word line passing, in succession, over the storage region of a first one of the memory cells and electrically integral with the gate region of a second one of the memory cells. The column arrangement of memory cells is interdigitated such that the memory cells associated with a single bit line are arranged in first and second parallel lines along both the left and right sides of each bit line. Thus, the bit line is arranged in a zig-zag configuration alternatively contacting memory cells arranged along its left and right side.
Inventors
- 👤 Roy E. Scheuerlein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:49
CPC Classifications
G; G11; G11C; G11C5/00; G11C5/06; G11C5/063; G11C11/00; G11C11/21; G11C11/34; G11C11/40; G11C11/401; G11C11/403; G11C11/4063; G11C11/407; G11C11/409; G11C11/4097
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
144 words
An integrated circuit electronic memory array having a plurality of memory cells, each memory cell of said array having a gate region for controlling the transfer of binary information in and out of a corresponding storage region, and a bit line contact region, said array comprising: a plurality of word lines arranged in rows each of said word lines alternately passing over the storage region of a first one of said memory cells and being electrically integral with the gate region of a second one of said memory cells; and a plurality of bit lines arranged in columns substantially orthogonal to said word lines, memory cells being arranged along first and second parallel lines in each one of said columns; each of said plurality of bit lines having portions extending to electrically contact memory cells arranged along said first and second parallel lines, respectively.
Claim 2
Dependent Claim
144 words
An integrated circuit electronic memory array having a plurality of memory cells, each memory cell of said array having a gate region for controlling the transfer of binary information in and out of a corresponding storage region, and a bit line contact region, said array comprising: a plurality of word lines arranged in rows each of said word lines alternately passing over the storage region of a first one of said memory cells and being electrically integral with the gate region of a second one of said memory cells; and a plurality of bit lines arranged in columns substantially orthogonal to said word lines, memory cells being arranged along first and second parallel lines in each one of said columns; each of said plurality of bit lines having portions extending to electrically contact memory cells arranged along said first and second parallel lines, respectively.
Claim 3
Dependent Claim
37 words
An integrated circuit electronic memory array as in claim 1 wherein each said bit line contact region is a common bit line contact region for a pair of adjacent memory cells along said plurality of bit lines.
Claim 4
Dependent Claim
33 words
An integrated circuit electronic memory array as in claim 1 wherein at least one of said plurality of word lines is spaced substantially the same distance from each of its adjacent word lines.
Claim 5
Dependent Claim
28 words
An integrated circuit electronic memory array as in claim 1 wherein each said plurality of bit lines is formed substantially passing over each said plurality of word lines.
Claim 6
Dependent Claim
45 words
An integrated circuit electronic memory array as in claim 4 wherein each said plurality of word lines is formed from a conductive material selected from the group consisting of polysilicon and polysilicide material, and each said plurality of bit lines is formed from a metal.
Claim 7
Dependent Claim
36 words
An integrated circuit electronic memory array as in claim 4 wherein each said plurality of word lines and bit lines is formed from a conductive material selected from the group consisting of polysilicon and polysilicide material.
Claim 8
Dependent Claim
130 words
An integrated circuit electronic memory array as in claim 1 wherein said plurality of memory cells and associated support circuits are formed on a semiconductor substrate doped with impurities of a first conductivity type and comprising: a doped region of a second conductivity type introduced into said substrate and forming a PN junction therewith, one of said plurality of bit lines contacting said doped region and forming said bit line contact region therewith; a channel region in said substrate adjacent said doped region and underlying the gate region electrically integral with one of said plurality of word lines; a capacitor region in said substrate adjacent said channel region and underlying a plate region, forming said corresponding storage region; and an isolation region formed into said substrate adjacent said capacitor region.
Claim 9
Dependent Claim
33 words
An integrated circuit electronic memory array as in claim 7 wherein said doped region is shared with an adjacent memory cell also having a capacitor region, a channel region, and an isolation region.
Claim 10
Dependent Claim
42 words
An integrated circuit electronic memory array as in claim 8 further comprising: an additional doped region of a second conductivity type also introduced into said substrate and forming a PN junction therewith, and positioned between said channel region and said capacitor region.
Claim 11
Dependent Claim
32 words
An integrated circuit electronic memory array as in claim 7 wherein said first conductivity type is formed by P type impurities and said second conductivity type is formed by N type impurities.
Claim 12
Dependent Claim
20 words
An integrated circuit electronic memory array as in claim 7 wherein said word line is formed from a polysilicon material.
Claim 13
Dependent Claim
20 words
An integrated circuit electronic memory array as in claim 7 wherein said word line is formed from a polysilicide material.
Claim 14
Dependent Claim
33 words
An integrated circuit electronic memory array as in claim 7 wherein said word lines are positioned entirely above the substrate surface and said bit lines are positioned substantially passing over said word lines.
Claim 15
Dependent Claim
19 words
An integrated circuit electronic memory array as in claim 13 wherein said bit lines are formed from a metal.
Claim 16
Dependent Claim
42 words
An integrated circuit electronic memory array as in claim 7 further comprising: an additional doped region of a second conductivity type also introduced into said substrate and forming a PN junction therewith, and positioned between said channel region and said capacitor region.
Claim 17
Dependent Claim
127 words
An integrated circuit electronic memory array having a plurality of memory cells, each memory cell of said array having a gate region for controlling the transfer of binary information in and out of a corresponding storage region, and a bit line contact region, said array comprising: a plurality of word lines arranged in rows, each said word lines alternately passing over the storage region of a first one of said memory cells and being electrically integral with the gate region of a second one of said memory cells; and a plurality of bit lines arranged in columns substantially along parallel center lines orthogonal to said word lines, each said plurality of bit lines alternately contacting a bit line contact region on opposite sides of its center line.
Claim 18
Dependent Claim
127 words
An integrated circuit electronic memory array having a plurality of memory cells, each memory cell of said array having a gate region for controlling the transfer of binary information in and out of a corresponding storage region, and a bit line contact region, said array comprising: a plurality of word lines arranged in rows, each said word lines alternately passing over the storage region of a first one of said memory cells and being electrically integral with the gate region of a second one of said memory cells; and a plurality of bit lines arranged in columns substantially along parallel center lines orthogonal to said word lines, each said plurality of bit lines alternately contacting a bit line contact region on opposite sides of its center line.
Claim 19
Dependent Claim
37 words
An integrated circuit electronic memory array as in claim 16 wherein each said bit line contact region is a common bit line contact region for a pair of adjacent memory cells along said plurality of bit lines.
Claim 20
Dependent Claim
33 words
An integrated circuit electronic memory array as in claim 16 wherein at least one of said plurality of word lines is spaced substantially the same distance from each of its adjacent word lines.
Claim 21
Dependent Claim
28 words
An integrated circuit electronic memory array as in claim 16 wherein each said plurality of bit lines is formed substantially passing over each said plurality of word lines.
Claim 22
Dependent Claim
45 words
An integrated circuit electronic memory array as in claim 16 wherein each said plurality of word lines is formed from a conductive material selected from the group consisting of polysilicon and polysilicide material, and each said plurality of bit lines is formed from a metal.
Claim 23
Dependent Claim
33 words
An integrated circuit electronic memory array as in claim 16 wherein each said plurality of word lines is formed from a conductive material selected from the group consisting of polysilicon and polysilicide material.
Claim 24
Dependent Claim
130 words
An integrated circuit electronic memory array as in claim 16 wherein said plurality of memory cells and associated support circuits are formed on a semiconductor substrate doped with impurities of a first conductivity type and comprising: a doped region of a second conductivity type introduced into said substrate and forming a PN junction therewith, one of said plurality of bit lines contacting said doped region and forming said bit line contact region therewith; a channel region in said substrate adjacent said doped region and underlying the gate region electrically integral with one of said plurality of word lines; a capacitor region in said substrate adjacent said channel region and underlying a plate region, forming said corresponding storage region; and an isolation region formed into said substrate adjacent said capacitor region.
Claim 25
Dependent Claim
33 words
An integrated circuit electronic memory array as in claim 22 wherein said doped region is shared with an adjacent memory cell also having a capacitor region, a channel region, and an isolation region.
Claim 26
Dependent Claim
32 words
An integrated circuit electronic memory array as in claim 22 wherein said first conductivity type is formed by P type impurities and said second conductivity type is formed by N type impurities.
Claim 27
Dependent Claim
20 words
An integrated circuit electronic memory array as in claim 22 wherein said word line is formed from a polysilicon material.
Claim 28
Dependent Claim
20 words
An integrated circuit electronic memory array as in claim 22 wherein said word line is formed from a polysilicide material.
Claim 29
Dependent Claim
33 words
An integrated circuit electronic memory array as in claim 22 wherein said word lines are positioned entirely above the substrate surface and said bit lines are positioned substantially passing over said word lines.
Claim 30
Dependent Claim
19 words
An integrated circuit electronic memory array as in claim 27 wherein said bit lines are formed from a metal.
Claim 31
Dependent Claim
54 words
An integrated circuit electronic memory array as in claims 1 or 16, further comprising: a plurality of conducting lines disposed over corresponding ones of said plurality of word lines respectively and making periodic electrical contact with said plurality of word lines, thereby reducing the effective electrical resistance of each said plurality of word lines.
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) | 1985-03-08 | 1985-09-07 | 1986-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-03-08 | 1989-09-07 | 1990-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-03-08 | 1993-09-07 | 1994-03-09 | $7700.00 | Window Closed / Lapsed |