JPH03104272A - Semiconductor memory - Google Patents

Semiconductor memory

Info

Publication number
JPH03104272A
JPH03104272A JP1242783A JP24278389A JPH03104272A JP H03104272 A JPH03104272 A JP H03104272A JP 1242783 A JP1242783 A JP 1242783A JP 24278389 A JP24278389 A JP 24278389A JP H03104272 A JPH03104272 A JP H03104272A
Authority
JP
Japan
Prior art keywords
word
bli
mcsi
bit line
memory
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
JP1242783A
Other languages
Japanese (ja)
Inventor
Masaharu Kagohashi
篭橋 正春
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.)
Fujitsu VLSI Ltd
Fujitsu Ltd
Original Assignee
Fujitsu VLSI Ltd
Fujitsu 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 Fujitsu VLSI Ltd, Fujitsu Ltd filed Critical Fujitsu VLSI Ltd
Priority to JP1242783A priority Critical patent/JPH03104272A/en
Publication of JPH03104272A publication Critical patent/JPH03104272A/en
Pending legal-status Critical Current

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  • Static Random-Access Memory (AREA)
  • Semiconductor Memories (AREA)

Abstract

PURPOSE:To accommodate word drivers sufficiently even though this memory is equipped with micro memory cells by making each bit line pair and the next bit line pair overlap partially and disposing the memory cells located on word lines on one side of each word line and on the other side of the word line alternately and making each word driver drive two pieces of word lines. CONSTITUTION:When a word line WLi is selected, memory cells, i.e. MCsi,i, MCsi,i+1, MCsi,i+2, MCsi,i+3... are connected to respective bit line pairs, i.e., BLi and BLi, BLi+1 and BLi+1, BLi+2 and BLi+2, BLi+3 and BLi+3... and then, if reading out, memory data of respective cells appear in respective bit line pairs. These data are selected by column gates, i.e., CGi, CGi+1, CGi+2, CGi+3... and are amplified by a sense amp. SA and then, are sent to a data bus. In this memory, each row of a cell array is composed of the cells, i.e., MCsi,i and MCsi,i+2...MCsi,i+1 and MCsi,i+3... and each word line WLi, WLi+1... selects the cells for two rows simultaneously. Consequently, spaces of word lines, i.e., WLi, WLi+1... are twice as large as those of the ordinary word lines.

Description

【発明の詳細な説明】 〔発明の概要〕 大容量化に適する半導体記憶装置に関し、メモリセルを
微小化してもそれに応じてワード線間隔を小にする必要
がなく、従ってワードドライバを充分収容できるように
することを目的とし、多数のワード線とビット線対と、
これらの各交点に配設されるメモリセルとする半導体記
憶装置において、隣接する2つのビット線対を一部オー
バラップさせ、各メモリセルを交互にワード線の−側と
他側に配置して、各ワード線間にはぐ2メモリセルが置
かれるように構或する。
[Detailed Description of the Invention] [Summary of the Invention] Regarding a semiconductor memory device suitable for increasing capacity, even if memory cells are miniaturized, there is no need to reduce the word line spacing accordingly, and therefore word drivers can be accommodated sufficiently. With a large number of word lines and bit line pairs,
In a semiconductor memory device in which memory cells are arranged at each of these intersections, two adjacent bit line pairs are partially overlapped, and each memory cell is arranged alternately on the negative side and the other side of the word line. , two memory cells are placed between each word line.

〔産業上の利用分野〕[Industrial application field]

本発明は、大容量化に適する半導体記憶装置に関する。 The present invention relates to a semiconductor memory device suitable for increasing capacity.

近年の半導体記憶装置には高集積化と高速化の両立が要
求されている。そのためには素子の微細化による高集積
化と共に、配線方法によってその高集積化と高速化を達
威させる必要がある。
In recent years, semiconductor memory devices are required to have both high integration and high speed. To achieve this, it is necessary to achieve high integration by miniaturizing elements and also to achieve high integration and high speed by wiring methods.

〔従来の技術〕[Conventional technology]

従来の半導体記憶装置では多数のワード線とビット線が
行.列方向に延びて格子状をなし、1ワード線の選択で
l行分のメモリセル群が各々のピント線に接続される。
Conventional semiconductor memory devices have many word lines and bit lines. The memory cells extend in the column direction to form a grid, and by selecting one word line, l rows of memory cells are connected to each focus line.

第3図はスタティックRAMの一部を示し、WLt−+
,WLi, WLi.1はi−1番目,i番目,i+1
番目のワード線、BL五 と百t▲+  B L i−
*とBL=−*はi番目,i+1番目のビット線対、M
C+.!はi番目のワード線WL.とi番目のビント線
対BLi,BLiの交点に配設されるメモリセル、Mc
i.,,,はi+1番目のワード線WLi.I とi番
目のビット線対BL+.BLtとの交点に配設されるメ
モリセルである。他もこれに準ずる。スタティックRA
Mのメモリセルは同図(b)に示すようにトランジスタ
Q..Q.と負荷R+,Rzで構戒するフリップフロッ
プと、その人/出力端をビット線へ接続するトランスフ
ァゲートを構戒するトランジスタQ..Q.からなる。
Figure 3 shows part of the static RAM, WLt-+
, WLi, WLi. 1 is i-1st, i-th, i+1
th word line, BL5 and 100t▲+BL i-
* and BL=-* are the i-th and i+1-th bit line pair, M
C+. ! is the i-th word line WL. A memory cell arranged at the intersection of the i-th bint line pair BLi, BLi, Mc
i. , , is the i+1th word line WLi. I and the i-th bit line pair BL+. This is a memory cell arranged at the intersection with BLt. Others follow suit. static RA
The memory cell M has a transistor Q.M as shown in FIG. .. Q. and a flip-flop with loads R+ and Rz, and a transistor Q with a transfer gate connecting its output terminal to the bit line. .. Q. Consisting of

ワード線囚L!を選択する(Hレベルにする)とトラン
ジスタQ3,Q4がオンになり、上記人/出力端がビッ
ト線BL,,百t!に接続されて書込み/読出しが行な
われる。ワード線は選択されるとき、そのワード線上の
全メモリセルのトランスファゲートを開くので、S亥全
メモリセルが当j亥ビット線対へ接続される。
Word line prisoner L! When you select (set to H level), transistors Q3 and Q4 turn on, and the output terminal is connected to the bit line BL, 100t! Writing/reading is performed by connecting to. When a word line is selected, it opens the transfer gates of all memory cells on that word line, so that all memory cells are connected to the current bit line pair.

ワード線はワードドライバにより駆動され、ワードドラ
イバはワードデコーダにより制御される。
The word line is driven by a word driver, and the word driver is controlled by a word decoder.

そして、大容量メモリはメモリセルの微小化により達或
されるが、メモリセルを微小化すればワード線間隔及び
ビット線間隔が小になる。ワードドライバは、ワード線
が持つ抵抗及び寄生容量に打勝ってこれをその端末まで
高速にH/Lレベルにする必要があり、この点で微小化
に限度があり、高集積化を進めるとワード線間隔内に収
まらなくなる。
Large capacity memories are achieved by miniaturizing memory cells, and miniaturizing memory cells reduces the word line spacing and bit line spacing. The word driver needs to overcome the resistance and parasitic capacitance of the word line and bring it to the H/L level quickly to the terminal.There is a limit to miniaturization in this respect, and as the word line becomes more integrated, It will no longer fit within the line spacing.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

従来の、■ワード線がセルアレイの1行分のセルを選択
する方式では、ワードドライバのピッチはメモリセルの
大きさに支配され、セルの微細化でピッチが小になると
収容し切れないという問題がある。
In the conventional method in which the word line selects one row of cells in the cell array, the pitch of the word driver is controlled by the size of the memory cell, and as the pitch becomes smaller due to cell miniaturization, there is a problem that it cannot be accommodated. There is.

本発明は、メモリセルを微小化してもそれに応じてワー
ド線間隔を小にする必要がなく、従ってワードドライバ
を充分収容できるようにすることを目的とするものであ
る。
An object of the present invention is to make it possible to sufficiently accommodate word drivers without the need to reduce the word line spacing correspondingly even if memory cells are miniaturized.

〔課題を解決するための手段〕[Means to solve the problem]

第1図に示すように本発明ではビット線対を次のビット
線対と一部オーバラップさせる。即ちビット線対BL.
, 百t8の一方のビット線百Liは、次のビット線対
B L i − + , B L iや1の間に入るよ
そにする。そしてワード線上のメモリセルは交互にその
一側、他側にあるようにする。例えばメモリセルMC.
,.はワード線WL▲の図面で下方にあり、次のメモリ
セルMCえ,!1は該ワード線W L 1の同上方にあ
り、次のメモリセルM C i + i ” Zは該ワ
ード線WL▲の同下方にあり、次のメモリセルMCt+
t*sは該ワード線WL.の同上方にあるようにする。
As shown in FIG. 1, in the present invention, one bit line pair partially overlaps the next bit line pair. That is, bit line pair BL.
, 100t8, one bit line 100Li is placed somewhere between the next bit line pair BLi-+, BLi and 1. The memory cells on the word line are arranged alternately on one side and the other side. For example, memory cell MC.
、. is below the word line WL▲ in the drawing, and the next memory cell MC, ! 1 is located above the word line WL1, and the next memory cell MC i + i''Z is located below the word line WL▲, and the next memory cell MCt+
t*s is the word line WL. so that it is above the same level as above.

他もこれに準ずる。Others follow suit.

また第2図に示すように本発明では隣接する2本のワー
ド線a,bを1つに纏め、これらをi番目のワード線W
L4,!,,番目のワード線WL正,,・・・・・・と
して各々のワードドライバで駆動する。従って1つのワ
ードドライバが2本のワード線を駆動することになる。
Further, as shown in FIG. 2, in the present invention, two adjacent word lines a and b are combined into one word line W.
L4,! ,,th word line WL is driven by each word driver as positive, . . . . Therefore, one word driver drives two word lines.

ビット線対は第1図と同様に一部オーバラフプさせる. 〔作用〕 第1図のように一本のワード線の一側および他側にメモ
リセルを配置すると、ワード線間隔内にほマ2メモリセ
ルが収容されることになり、ワード線間隔を大にする、
ひいてはワードドライバを収容可能にすることができる
The bit line pairs are partially overlapped as in Figure 1. [Function] When memory cells are placed on one side and the other side of a single word line as shown in Figure 1, approximately two memory cells are accommodated within the word line spacing, which increases the word line spacing. to,
As a result, a word driver can be accommodated.

従来の第3図では2メモリセルを1個所でビット線へ接
続するので、ワード線WL..と囚L.の間にはほイ2
メモリセルが置かれるが、ビット線へのコンタクトC部
分では即ちビット線BL,とBLi。1の間はメモリセ
ルも置かれないことになり、平均すれば各ビット線間に
1メモリセルが置かれることになる。
In the conventional method shown in FIG. 3, two memory cells are connected to the bit line at one point, so the word line WL. .. and prisoner L. Between the two
Memory cells are placed in contact C portions to the bit lines, ie, bit lines BL and BLi. No memory cell is placed between bit lines, and on average, one memory cell is placed between each bit line.

また第2図では隣接する2本のワード線a,  bを1
ワードドライバが駆動するので、ワードドライバのピッ
チはワード線ピッチの2倍になる。従ってセルを微小化
してもワードドライバの収容スペースを確保できる。ワ
ード線は2本を1本に纏める他、3本,4本・・・・・
・を1本に纏めてもよく、その場合は一層ワードドライ
バの収容スペース確保に余裕ができる。
In addition, in Fig. 2, two adjacent word lines a and b are
Since the word driver drives, the word driver pitch is twice the word line pitch. Therefore, even if the cell is miniaturized, a space for accommodating the word driver can be secured. In addition to combining two word lines into one, there are also three, four, etc.
・ may be combined into one, and in that case, there is even more room for accommodating the word driver.

〔実施例〕〔Example〕

本発明の実施例は第1図および第2図に示す如くである
。第l図でi番目のワード線WL.を選択するとメモリ
セルMCえ,えとI−IC.,え。1とM C @ 1
 i ” ZとMCt.i*sと・・・・・・が選択さ
れ、読出しならセル記憶データがビット線対BL.と百
E1,BLi司とBL,tやx,BL=や2とBLiや
2,B L =−sとB L =−s ,・・・・・・
に出てくる。これを図示しないコラムゲートで選択し、
センスアンプで増幅して、データパスへ送出する。他の
ワード線WL,−,,%AJL i + 1 + ・・
・・・・を選択したときも同様である。
An embodiment of the invention is shown in FIGS. 1 and 2. In FIG. 1, the i-th word line WL. When you select memory cell MC, er, I-IC. ,picture. 1 and M C @ 1
i ” Z and MCt.i*s are selected, and for reading, the cell storage data is bit line pair BL. 2, B L =-s and B L =-s ,...
It comes out. Select this using a column gate (not shown),
Amplify it with a sense amplifier and send it to the data path. Other word lines WL, -,, %AJL i + 1 +...
The same applies when selecting ....

メモリセルは第3図に示したようにフリップフロッフ゜
とトランスファゲートで構威され、富亥トランスファゲ
ートを構戒するトランジスタQ3.Q.のゲートはワー
ド線である。該ゲート従ってワード線は例えば多結晶シ
リコンで作り、ビット線はアルミニウムなどの金属で作
る。コンタクトCは、ビット線とトランスファゲートト
ランジスタのソース/ドレインとを接続する。配線は通
常、多層配線になる。このメモリはビット線対BL.と
BLi,BL▲.,とBL.やlが1単位となり、これ
が所要数並設された形でメモリが構威される。
As shown in FIG. 3, the memory cell consists of a flip-flop and a transfer gate, and a transistor Q3. Q. The gate of is the word line. The gates and therefore the word lines are made of polycrystalline silicon, for example, and the bit lines are made of a metal such as aluminum. Contact C connects the bit line and the source/drain of the transfer gate transistor. Wiring is usually multilayer wiring. This memory has bit line pair BL. and BLi, BL▲. , and BL. The memory is constructed by arranging a required number of units in parallel.

第2図ではワード線WL,を選択するとメモリセルMC
i,五とM C i + f ” I とM C ! 
+ + 4zと?IC直..,と・・・・・・が各々の
ビット線対BL,とBLt.BLi−+ とB L i
+t , B L + .zとB L =+z +BL
.。,とB L +−s .・・・・・・に接続され、
読出しなら、各セルの記憶データが各々のビット線対に
出てくる。これをコラムゲートCG.,CG,.,,C
G i+Z+  CC’i43+ ・・・・・・で選択
し、センスアンプSAで増幅し、データパスへ送出する
。このメモリではセルMC直,iとMC五.i.2・・
・・・・MCi,!。1とM C i + f ” 3
・・・・・・がセルアレイの各1行を構威し、1本のワ
ード線WL.,WL.。.・・・・・・が2行分のセル
を同時に選択する。従ってワード線一L i rW L
 i + I 1 ・・・・・・の間隔は通常の2倍に
なる。
In FIG. 2, when word line WL is selected, memory cell MC
i, five and M C i + f” I and M C!
+ + 4z? IC direct. .. , . . . are the respective bit line pairs BL, BLt. BLi-+ and BLi
+t, BL+. z and BL = +z +BL
.. . , and B L +-s . connected to...
For reading, the stored data of each cell comes out to each bit line pair. This is the column gate CG. ,CG,. ,,C
Selected by G i+Z+ CC'i43+ . . . , amplified by sense amplifier SA, and sent to the data path. In this memory, cells MC5, i and MC5. i. 2...
...MCi,! . 1 and MC i + f” 3
... constitutes each row of the cell array, and one word line WL. , W.L. . .. ... selects two rows of cells at the same time. Therefore, word line 1L i rW L
The interval between i + I 1 ... is twice the normal distance.

〔発明の効果〕〔Effect of the invention〕

以上説明したように本発明によれば、ワード線間隔を大
にすることができ、これによりワードドライバのスペー
スを広く確保できて、高集積度のメモリの製作上のネッ
クの1つに対する有効な対策を提供することができる。
As explained above, according to the present invention, it is possible to increase the word line spacing, thereby securing a wide space for the word driver, and effectively solving one of the bottlenecks in manufacturing highly integrated memories. Countermeasures can be provided.

またlつのビット線対に付くメモリセルの数が少なくな
るのでビット線容量が小になり、メモリの高速化に寄与
することができる.
Furthermore, since the number of memory cells attached to one bit line pair is reduced, the bit line capacity is reduced, contributing to faster memory speeds.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は本発明lの記憶装置の説明図、第2図は本発明
2の記憶装置の説明図、第3図は従来の記憶装置の説明
図である。 第1図、第2図でWLはワー,ド線、BL, 百Eはビ
ット線対、MCはメモリセルである。
FIG. 1 is an explanatory diagram of a storage device according to the first invention, FIG. 2 is an explanatory diagram of a storage device according to the second invention, and FIG. 3 is an explanatory diagram of a conventional storage device. In FIGS. 1 and 2, WL is a word line, BL, 100E is a bit line pair, and MC is a memory cell.

Claims (1)

【特許請求の範囲】 1、多数のワード線とビット線対と、これらの各交点に
配設されるメモリセルとを有する半導体記憶装置におい
て、 隣接する2つのビット線対(BL_iと■_i、BL_
i_+_1と■)を一部オーバラップさせ、各メモリセ
ル(MC_i_、_iとMC_i_、_i_+_1…)
を交互にワード線の一側と他側に配置して、各ワード線
間にほゞ2メモリセルが置かれるようにしたことを特徴
とする半導体記憶装置。 2、多数のワード線とビット線対と、これらの各交点に
配設されるメモリセルとワードドライバを有する半導体
記憶装置において、 隣接する2つのビット線対(BL_iと■_i、BL_
i_+_1と■)を一部オーバラップさせ、また隣接す
る複数のワード線(a、b)を1つに纏めて各ワードド
ライバは複数のワード線を駆動するようにしたことを特
徴とする半導体記憶装置。
[Claims] 1. In a semiconductor memory device having a large number of word line and bit line pairs and memory cells arranged at each intersection of these, two adjacent bit line pairs (BL_i and ■_i, BL_
i_+_1 and ■) are partially overlapped, and each memory cell (MC_i_,_i and MC_i_,_i_+_1...)
A semiconductor memory device characterized in that memory cells are arranged alternately on one side and the other side of word lines so that approximately two memory cells are placed between each word line. 2. In a semiconductor memory device having a large number of word line and bit line pairs, and memory cells and word drivers arranged at each intersection of these, two adjacent bit line pairs (BL_i and ■_i, BL_
A semiconductor memory characterized in that i_+_1 and ■) are partially overlapped, and a plurality of adjacent word lines (a, b) are combined into one, so that each word driver drives a plurality of word lines. Device.
JP1242783A 1989-09-19 1989-09-19 Semiconductor memory Pending JPH03104272A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1242783A JPH03104272A (en) 1989-09-19 1989-09-19 Semiconductor memory

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1242783A JPH03104272A (en) 1989-09-19 1989-09-19 Semiconductor memory

Publications (1)

Publication Number Publication Date
JPH03104272A true JPH03104272A (en) 1991-05-01

Family

ID=17094223

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1242783A Pending JPH03104272A (en) 1989-09-19 1989-09-19 Semiconductor memory

Country Status (1)

Country Link
JP (1) JPH03104272A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05266670A (en) * 1991-12-04 1993-10-15 Samsung Electron Co Ltd Semiconductor memory device
JPH0945870A (en) * 1995-05-24 1997-02-14 Kawasaki Steel Corp Semiconductor memory and layout structure of associative memory

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05266670A (en) * 1991-12-04 1993-10-15 Samsung Electron Co Ltd Semiconductor memory device
JPH0945870A (en) * 1995-05-24 1997-02-14 Kawasaki Steel Corp Semiconductor memory and layout structure of associative memory

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