JPS61150348A - Programmable logic array of field program - Google Patents

Programmable logic array of field program

Info

Publication number
JPS61150348A
JPS61150348A JP59275606A JP27560684A JPS61150348A JP S61150348 A JPS61150348 A JP S61150348A JP 59275606 A JP59275606 A JP 59275606A JP 27560684 A JP27560684 A JP 27560684A JP S61150348 A JPS61150348 A JP S61150348A
Authority
JP
Japan
Prior art keywords
substrate
wiring
plane
potential
diffusion layer
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
JP59275606A
Other languages
Japanese (ja)
Inventor
Akira Otsuka
亮 大塚
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 JP59275606A priority Critical patent/JPS61150348A/en
Publication of JPS61150348A publication Critical patent/JPS61150348A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10BELECTRONIC MEMORY DEVICES
    • H10B20/00Read-only memory [ROM] devices

Landscapes

  • Internal Circuitry In Semiconductor Integrated Circuit Devices (AREA)
  • Design And Manufacture Of Integrated Circuits (AREA)

Abstract

PURPOSE:To obtain the field program PLA capable of stabilization of a potential of a substrate without enlarging an area for layout by connecting the wiring layer held at a constant potential to the substrate in the position where no transistor is arranged in an OR or AND plane. CONSTITUTION:In the position which has no relation logically and where nothing is arranged, the third wiring layer 7 connected to the first power source in order to stabilize a potential of a substrate dividing the first diffusion layer wiring 1, and a hole 5 connecting it to the substrate, and the third diffusion layer wiring 6 of the same conductive type as that of the substrate are arranged. In this constitution, a transistor is not arranged in the connecting part of the substrate and the wiring layer held at a constant potential, so that a potential of the substrate can be stabilized without enlarging a layout area even if the layout of an OR plane becomes large due to an increase of the number of input and multiplication terms. This is also applicable to the constitution of the AND plane.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、フィールドプログラムPLA(Progr
amable Logic Array  :この明細
書で&1PLAという)に関するものである。
[Detailed Description of the Invention] [Field of Industrial Application] This invention is directed to field program PLA (Progr.
amable Logic Array (referred to as &1PLA in this specification).

〔従来の技術〕[Conventional technology]

従来のフィールドプログラムPLAのVイアウド構成の
概念を第2図によって説明する。第2図はフィールドプ
ログラムPLAのOR平面のンイアウト構成の一部であ
る。第2図において、1はml’ilL源に接続された
fmlの導電型の拡散層配線。
The concept of the V iaud configuration of the conventional field program PLA will be explained with reference to FIG. FIG. 2 shows a part of the in-out configuration of the OR plane of the field program PLA. In FIG. 2, reference numeral 1 denotes a diffusion layer wiring of fml conductivity type connected to the ml'ilL source.

2は入力信号のデコード出力に接続された第1の配線層
で、拡散層配111j!1との交点にトランジスタを形
成するものであり、3は断続的あるいは連続的に電流を
制限する負荷を通してj1!2亀源に接続されたJg2
の配置層、4は前記第1の配線層2と父差した部分での
み拡散層配線1と接続されるが、まったく拡散層配線1
と接続されていない第1の導[ffiの第2の拡散層配
線、5は■「記第2の拡散層配線4および第1の配線層
2と第2の配線層3を分離する絶縁層に開けられたコン
タクト穴である。
2 is the first wiring layer connected to the decoded output of the input signal, and the diffusion layer 111j! A transistor is formed at the intersection with 1, and 3 is Jg2 connected to the j1!2 source through a load that limits the current intermittently or continuously.
The arrangement layer 4 is connected to the diffusion layer wiring 1 only at the part facing the first wiring layer 2, but the diffusion layer wiring 1 is not connected to the diffusion layer wiring 1 at all.
The first conductor [ffi second diffusion layer wiring, 5 is not connected to the second diffusion layer wiring 4 and the insulating layer separating the first wiring layer 2 and the second wiring layer 3. This is a contact hole drilled in the.

次に動作釦ついて説明する。Next, the operation buttons will be explained.

電流を制限する負荷を通して第2iK流に接続されたM
2の配線層3.およびコンタクト穴SV介して第2の配
線層3に接続された第2の拡散層配線、4は、負荷を介
して第2電源に接続されているためM2111L源電位
と導しい電位である。次に入力信号のデコード出力に接
続された第1の配蛛膚2に信号が伝えられ′電位が第2
電源電位に近づくと、第1の配Iw層2と第2の拡散層
配線4の交差した部分に形成されたトランジスタが導通
状態となり、第1の配線層2と交差して第1電源に接続
された第1の拡散層配線1に接続されrs第2の拡散層
間@4およびこの第2の拡散層間1M4に接続された第
2の配線層3は、第1電源電位に等しくなる。
M connected to the second iK current through a current limiting load
2 wiring layer 3. The second diffusion layer wiring 4 connected to the second wiring layer 3 through the contact hole SV is connected to the second power supply through the load, and therefore has a potential that is similar to the M2111L source potential. Next, the signal is transmitted to the first spider skin 2 connected to the decoding output of the input signal, and the potential is changed to the second one.
When the power supply potential approaches, the transistor formed at the intersection of the first wiring layer 2 and the second diffusion layer wiring 4 becomes conductive, crossing the first wiring layer 2 and connecting to the first power supply. The second wiring layer 3 connected to the first diffusion layer wiring 1 and connected to the rs second diffusion layer gap @4 and the second diffusion layer gap 1M4 becomes equal to the first power supply potential.

これにより入力の任意の組合せを選ぶように、第1の配
線層2と交差して第1の拡散層配線1に接続される第2
の拡散層配線4を配置すれは、希望する任意の論理機能
を実現させるPLAのOR千圃面1r構成することがで
きる。
As a result, the second diffusion layer wiring 1 intersects with the first wiring layer 2 and is connected to the first diffusion layer wiring 1 so as to select an arbitrary combination of inputs.
By arranging the diffusion layer wiring 4, it is possible to configure an OR plane 1r of PLA that realizes any desired logical function.

[覚明か解決しようとする間組点〕 上記のような従来のフィールドプログラムPLAでは、
広い面積のOR平面を構成(7よ5としたとき、基板電
位を安定にしにクク、基板電位を安定させるためのコン
タクト穴l配置するためには、レイアウト面積が増大す
るという欠点かあった。
[Between understanding and trying to solve] In the conventional field program PLA as mentioned above,
When constructing an OR plane with a wide area (7 x 5), there was a disadvantage that the layout area increased in order to arrange contact holes l to stabilize the substrate potential.

この発明は、上記のよ5な従来のものの欠点を除去する
ためになされたもので、レイアウト面積を増大させるこ
となく基板電位を安定させるフィールドプログラムPL
A’Y得ることを目的としている。
This invention was made in order to eliminate the above-mentioned five drawbacks of the conventional ones, and it is a field program PL that stabilizes the substrate potential without increasing the layout area.
The purpose is to obtain A'Y.

〔問題点を解決するための手段〕[Means for solving problems]

この発明に係るフィールドプログラムPLAは。 The field program PLA according to this invention is.

OR平面またはAND平面内のトランジスタが配置され
ていない部位において一定電位に保持される配線層と基
板とのコンタク)Y施したものである。
A contact between the wiring layer and the substrate, which is held at a constant potential in a portion of the OR plane or the AND plane where no transistor is arranged, is applied.

〔作用〕[Effect]

この発明においては、一定電位に保持される配線層と基
板とのコンタク)Y施したので、基板電位は一定に保た
れる。そして、コンタクトを施した部分にはトランジス
タが配置されていないので、基板の大きさは増大しない
In this invention, since the wiring layer and the substrate are in contact with each other to be kept at a constant potential, the substrate potential is kept constant. Further, since no transistor is disposed in the contact area, the size of the substrate does not increase.

〔実施例〕〔Example〕

11111図はこの発明の一実施例を示すもので、帛2
図の従来のフィールドプログラムPLAのレイアウトに
基板へのコンタクトを追加したものであり、符号1〜5
は第2図と同じものである。6は基板電位を安定させる
ためのコンタクト穴5を介して、第1電源と基板を接続
させるためのH2の導*mの纂3の拡散層配線、Tはl
tl記コンタクト穴5ン介して第1の拡散層配線1と接
続され第1亀源に接続された第3の配線層である。
Figure 11111 shows one embodiment of this invention, and Figure 2
Contacts to the board are added to the layout of the conventional field program PLA shown in the figure, and are numbered 1 to 5.
is the same as in Figure 2. 6 is a diffusion layer wiring of H2 conductor*m series 3 for connecting the first power source and the substrate via a contact hole 5 for stabilizing the substrate potential, and T is l.
This is a third wiring layer connected to the first diffusion layer wiring 1 through the contact hole 5 and connected to the first source.

このフィールドプログラムPLAは、論理的には従来の
ものとまったく同一の動作を行う。しかし、従来のもの
では論理的に無関係であるため何も配置していなかった
部位に、第1の拡散層配線1を区分する基板の電位を安
定させるため、第1電源に接続された第3の配線層1と
、それt基板に接続させるためのコンタクト穴5.基板
と同一の導電型の第3の拡散層配線6を配置しである。
This field program PLA performs logically exactly the same operation as the conventional one. However, in order to stabilize the potential of the substrate that divides the first diffusion layer wiring 1, a third electrode connected to the first power supply is placed in a part where nothing was placed because it is logically unrelated in the conventional one. wiring layer 1 and a contact hole 5 for connecting it to the substrate. A third diffusion layer wiring 6 of the same conductivity type as the substrate is arranged.

このため、入力数、積項数が多くなりOR平面のレイア
ウトが大きくなっても、基板電位の安定化をレイアウト
面積を増大させることな(実現できる。
Therefore, even if the number of inputs and the number of product terms increases and the layout of the OR plane becomes larger, stabilization of the substrate potential can be achieved without increasing the layout area.

なお、上記実施例では、フィールドプログラムPLAの
OR平面の場合のレイアウト構成′%:i[したが、こ
の発明はOR平面に限らずAND平面の構成時にも応用
可能である。
In the above embodiment, the layout configuration is '%:i' in the case of the OR plane of the field program PLA, but the present invention is applicable not only to the OR plane but also to the AND plane configuration.

また、PLAに限らずROMのプログラムをフィールド
で行う場合にもこの発明は応用可能である。
Furthermore, the present invention is applicable not only to PLA but also to cases in which ROM programming is performed in the field.

〔発明の効果〕〔Effect of the invention〕

この発明は以上説明したとおり、OR平面、AND平面
内でトランジスタが配置されていない部位において、一
定電位に保持される配線層と基板とのコンタクトtとり
、基板を一定電位に保つようにしたので、フィールドプ
ログラムPLAのOR,AND平面の基板電位安定化1
に、レイアウト面積を増大させることな(はかることが
でき、ラッチアップに強(、ノイズマージンの大きいフ
ィールドプログラムPLAが得られるという効果がある
As explained above, this invention maintains the substrate at a constant potential by making contact between the wiring layer and the substrate, which are kept at a constant potential, in the areas where transistors are not placed in the OR plane and the AND plane. , field program PLA OR, AND plane substrate potential stabilization 1
Another advantage is that it is possible to obtain a field program PLA that is resistant to latch-up and has a large noise margin without increasing the layout area.

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

無1図はこの発明の一実施例を示すOR平面のレイアウ
ト配置図、lI42図は従来のフィールドプログラムP
LAのOR平面のレイアウト配置図である。 図において、1は第1の拡散層配線、2は第1の配線層
、3は第2の配&1層、4は第2の拡散層配線、5はコ
ンタクト穴、6は第3の拡散層配線。 Tは第3の配線層である。 代理人 大岩 増雄 (外2名) 第1図 2:*1の配線1 7:第3の配線1 第2図 手続補正書(自発) 3、補正をする者 事件との関係 特許出願人 4、代理人   志岐守哉 5゜補正の対象 明細書の発明の詳細な説明の欄 6、補正の内容 (1)明細書第2頁15行の「第2電流」を、「第2電
源」と補正する。 (2)同じく第2頁19行の「導し円を、「等しい」と
補正する。 以  上
Figure 1 is a layout diagram of an OR plane showing an embodiment of the present invention, and Figure 1I42 is a diagram of a conventional field program P.
It is a layout arrangement diagram of the OR plane of LA. In the figure, 1 is the first diffusion layer wiring, 2 is the first wiring layer, 3 is the second wiring &1 layer, 4 is the second diffusion layer wiring, 5 is the contact hole, and 6 is the third diffusion layer. wiring. T is the third wiring layer. Agent Masuo Oiwa (2 others) Figure 1 2: *1 wiring 1 7: 3rd wiring 1 Figure 2 Procedural amendment (voluntary) 3. Relationship with the case of the person making the amendment Patent applicant 4. Agent Moriya Shiki 5゜Detailed explanation of the invention column 6 of the specification subject to amendment, contents of the amendment (1) “Second current” on page 2, line 15 of the specification is amended to “second power source” do. (2) Similarly, the ``leading circle'' on page 2, line 19 is corrected to ``equal''. that's all

Claims (1)

【特許請求の範囲】[Claims]  OR平面またはAND平面内にアレイ状に配列された
トランジスタの導通の有無により論理をプログラムする
フィールドプログラムPLAにおいて、前記OR平面ま
たはAND平面内のトランジスタが配置されていない部
位において一定電位に保持される配線層と基板とのコン
タクトを施したことを特徴とするフィールドプログラム
PLA。
In a field program PLA in which logic is programmed based on the conduction or non-conduction of transistors arranged in an array in an OR plane or an AND plane, a constant potential is held at a portion in the OR plane or AND plane where no transistors are arranged. A field program PLA characterized by contact between a wiring layer and a substrate.
JP59275606A 1984-12-25 1984-12-25 Programmable logic array of field program Pending JPS61150348A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59275606A JPS61150348A (en) 1984-12-25 1984-12-25 Programmable logic array of field program

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59275606A JPS61150348A (en) 1984-12-25 1984-12-25 Programmable logic array of field program

Publications (1)

Publication Number Publication Date
JPS61150348A true JPS61150348A (en) 1986-07-09

Family

ID=17557783

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59275606A Pending JPS61150348A (en) 1984-12-25 1984-12-25 Programmable logic array of field program

Country Status (1)

Country Link
JP (1) JPS61150348A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03160747A (en) * 1989-11-20 1991-07-10 Toshiba Corp Semiconductor integrated circuit device
US7755813B2 (en) 2006-02-27 2010-07-13 Konica Minolta Business Technologies, Inc. Image reading apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03160747A (en) * 1989-11-20 1991-07-10 Toshiba Corp Semiconductor integrated circuit device
US7755813B2 (en) 2006-02-27 2010-07-13 Konica Minolta Business Technologies, Inc. Image reading apparatus

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