JPH06325589A - Semiconductor storage device - Google Patents

Semiconductor storage device

Info

Publication number
JPH06325589A
JPH06325589A JP5108648A JP10864893A JPH06325589A JP H06325589 A JPH06325589 A JP H06325589A JP 5108648 A JP5108648 A JP 5108648A JP 10864893 A JP10864893 A JP 10864893A JP H06325589 A JPH06325589 A JP H06325589A
Authority
JP
Japan
Prior art keywords
fuses
fuse
blown
laser
chip
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.)
Granted
Application number
JP5108648A
Other languages
Japanese (ja)
Other versions
JP3056019B2 (en
Inventor
Takahiro Hara
高弘 原
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.)
NEC Kyushu Ltd
Original Assignee
NEC Kyushu 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 NEC Kyushu Ltd filed Critical NEC Kyushu Ltd
Priority to JP5108648A priority Critical patent/JP3056019B2/en
Publication of JPH06325589A publication Critical patent/JPH06325589A/en
Application granted granted Critical
Publication of JP3056019B2 publication Critical patent/JP3056019B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • For Increasing The Reliability Of Semiconductor Memories (AREA)

Abstract

PURPOSE:To impart allowance to the aiming of laster at fuses to be cut by laser, and to reduce the area of a chip by using additionally electrically blown fuses. CONSTITUTION:The spaces of fuses H1 to Hn+1 for laser cutting can be left sufficiently by arranging the fuses on a scribing line, and fuse pitches can be shortened by disposing blown fuses HY1 to HYn+1 in a chip. The data of the blown fuses are prepared by cutting the fuses on the scribing line, and the blown frses can be trimmed easily by applying voltage from pads formed on the scribing line.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、半導体記憶装置に関
し、特に冗長メモリセルのトリミング回路に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a semiconductor memory device, and more particularly to a trimming circuit for redundant memory cells.

【0002】[0002]

【従来の技術】従来の冗長メモリセルのトリミング回路
を示す図2の(a)を参照すると、アドレス信号A1
T,A2T,…,AnTとそれぞれのインバート信号A
1B,A2B,…,AnBとが、それぞれNch・MO
Sトランジスタ信号21〜26のゲートに入力されて、
接点REDEとNch・MOSトランジスタ21〜26
のドレインとの間にそれぞれ接続されたレーザー切断用
のヒューズH1,H2,…,Hn+1が接続されてい
る。また、接点REDEは、抵抗Rを介して電源VCC
に接続されている。
2. Description of the Related Art Referring to FIG. 2A showing a conventional redundant memory cell trimming circuit, an address signal A1
, AnT and their respective inversion signals A
1B, A2B, ..., AnB are Nch MOs, respectively.
When input to the gates of the S transistor signals 21 to 26,
Contact point REED and Nch MOS transistors 21 to 26
, Fuses H1, H2, ..., Hn + 1 for laser cutting, which are connected to the respective drains of the lasers. Further, the contact REED is connected to the power source VCC via the resistor R.
It is connected to the.

【0003】接点REDEは、レベルが“H”レベルに
なったとき、冗長メモリセル活性化する信号である。
The contact point REED is a signal for activating the redundant memory cell when the level becomes "H" level.

【0004】そこで、Nch・MOSトランジスタ21
〜26の1つでもON状態にあると、接点REDEのレ
ベルは“L”となる様に、抵抗RとNch・MOSトラ
ンジスタの電流能力を設定している。
Therefore, the Nch MOS transistor 21
The current capability of the resistor R and the Nch-MOS transistor is set so that the level of the contact REED becomes "L" when any one of the elements ~ 26 is in the ON state.

【0005】任意のアドレスを冗長メモリセルに置換す
る場合、置換するアドレスを入力したときに、Nch・
MOSトランジスタ21〜26のうちON状態にあるN
ch・MOSトランジスタに接続されているヒューズH
1,H2,…,Hn+1をレーザーにて切断する。
When replacing an arbitrary address with a redundant memory cell, Nch.
N of the MOS transistors 21 to 26 in the ON state
Fuse H connected to ch MOS transistor
1, H2, ..., Hn + 1 are cut by a laser.

【0006】そうすると、接点REDEはGNDに落と
すバスがなくなり、接点REDEレベルは“H”レベル
となり、冗長メモリセルが活性化し、冗長メモリセルに
置換される。
Then, the contact REED has no bus to drop to GND, the contact REED level becomes "H" level, the redundant memory cell is activated, and the redundant memory cell is replaced.

【0007】[0007]

【発明が解決しようとする課題】このような従来の冗長
回路におけるトリミングはレーザー切断を用いている
為、図2の(b)に示す様なヒューズ27〜32をある
程度の間隔を持って配置する必要があった。集積化が進
むと、このヒューズピッチも小さくなり、レーザーの目
合精度も厳しくなる。又、チップ内にヒューズ部の占め
る面積も大きくなってくるという問題点があった。
Since the laser cutting is used for trimming in such a conventional redundant circuit, the fuses 27 to 32 as shown in FIG. 2B are arranged with a certain interval. There was a need. As the integration progresses, the fuse pitch also becomes smaller, and the accuracy of laser meshing becomes more severe. Further, there is a problem that the area occupied by the fuse portion in the chip also becomes large.

【0008】[0008]

【課題を解決するための手段】本発明の構成は、冗長メ
モリセルを有し、この冗長メモリセルの選択をヒューズ
切断にて行う半導体記憶装置において、レーザー切断に
てトリミングを行うヒューズをスクライブ線に配置し、
このスクライブ線のトリミングされたヒューズによって
プログラムされたデータに基づき、チップ内の溶断用ヒ
ューズを電気的に溶断する溶断用ヒューズを備えること
を特徴とする。
According to the structure of the present invention, in a semiconductor memory device having a redundant memory cell and selecting the redundant memory cell by cutting the fuse, a fuse for trimming by laser cutting is used as a scribe line. Placed in
The present invention is characterized by including a fusing fuse that electrically fuses the fusing fuse in the chip based on the data programmed by the trimmed fuse of the scribe line.

【0009】[0009]

【実施例】本発明の一実施例の半導体記憶装置を示す図
1の(A)を参照すると、この実施例は、レーザーカッ
ト用ヒューズ40と、溶断用ヒューズ41と、Pch・
MOSトランジスタ1と、Nch・MOSトランジスタ
2と、CMOSインバータ3と、トリミングテストモー
ド信号(TEST)入力端子と、電源電圧VCC端子
と、冗長メモリセルイネーブル信号(REDE)端子
と、トリミング印加電圧電源(VF)端子と、Nch・
MOSトランジスタ4〜9と、アドレス信号A1T,A
2T,…,AnT端子と、このインバート信号A1B,
A2B,…,AnB端子とを備える。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 1A showing a semiconductor memory device of one embodiment of the present invention, in this embodiment, a laser cutting fuse 40, a fusing fuse 41, a Pch.
MOS transistor 1, Nch-MOS transistor 2, CMOS inverter 3, trimming test mode signal (TEST) input terminal, power supply voltage VCC terminal, redundant memory cell enable signal (REDE) terminal, trimming applied voltage power supply ( VF) terminal and Nch
MOS transistors 4-9 and address signals A1T, A
2T, ..., AnT terminals and this inverted signal A1B,
, A2B, ..., AnB terminals.

【0010】ここで、レーザーカット用ヒューズ40
は、ヒューズH1〜Hn,Hn+1からなり、(B)に
示すヒューズ10〜14のように配列され、溶断用ヒュ
ーズ41はヒューズHY1,〜,HYn+1からなり、
(C)に示すヒューズ15〜20のようなパターンで配
列されるが、その配列間隔は小さくてよい。
Here, the laser cutting fuse 40
Is composed of fuses H1 to Hn and Hn + 1, and is arranged like fuses 10 to 14 shown in (B), and the fuse 41 for fusion is composed of fuses HY1, ..., HYn + 1,
The fuses 15 to 20 shown in (C) are arranged in a pattern, but the arrangement interval may be small.

【0011】レーザー切断用ヒューズH1,H2,…,
Hn+1及び電圧印加用パッドVFをスクライブ線上に
配置し、置換するアドレスに応じて(B)のレーザー切
断用ヒューズH1,H2,…,Hn+1を切断する。
Laser cutting fuses H1, H2, ...
Hn + 1 and the voltage application pad VF are arranged on the scribe line, and the laser cutting fuses H1, H2, ..., Hn + 1 of (B) are cut according to the address to be replaced.

【0012】さらに、(C)に示すチップ内の溶断用ヒ
ューズHY1,HY2,…,HYn+1を溶断する際に
は、信号TESTを“H”レベルにして、Pch・MO
Sトランジスタ1とNch・MOSトランジスタ2をO
FFさせ、さらにアドレス信号A1T,A2T,…,A
nTとインバート信号A1B,A2B,…,AnBの信
号をともに“L”レベルにすることで、Nch・MOS
トランジスタ4,5,6,7,8,9がすべてOFF状
態になり、スクライブ線上の電圧印加用パッドVFか
ら、(B)のレーザーカット用ヒューズH1,H2,
…,Hn+1と(C)の溶断用ヒューズHY1,HY
2,…,HYn+1が直列に接続されたことになり、レ
ーザー切断されていないヒューズに接続された溶断用ヒ
ューズには電流が流れ、ヒューズが溶断されるが、あら
かじめレーザーにて切断されているヒューズに接続され
た溶断用ヒューズには電流が流れず、溶断用ヒューズは
切れない。
Further, when the fusing fuses HY1, HY2, ..., HYn + 1 in the chip shown in (C) are blown, the signal TEST is set to "H" level to set Pch.MO.
S transistor 1 and Nch-MOS transistor 2 are turned on
FF, and further address signals A1T, A2T, ..., A
nT and the inversion signals A1B, A2B, ...
All the transistors 4, 5, 6, 7, 8 and 9 are turned off, and the laser cutting fuses H1, H2 of (B) from the voltage application pad VF on the scribe line.
..., fuses HY1 and HY for blowing Hn + 1 and (C)
2, ..., HYn + 1 are connected in series, and a current flows through the fusing fuse connected to the fuse that has not been laser-cut, and the fuse is blown, but the fuse has already been cut by the laser. No current flows through the fusing fuse connected to, and the fusing fuse cannot be blown.

【0013】このように、スクライブ線上の電圧印加パ
ッドVFに電圧を印加するだけで、溶断用ヒューズを簡
単にトリミングできる。
As described above, the fusing fuse can be easily trimmed by simply applying the voltage to the voltage application pad VF on the scribe line.

【0014】また、(C)の溶断用ヒューズは電流を流
して溶断する為、(B)のレーザー切断ヒューズの様に
レーザーとヒューズとの目合精度を必要としないので、
ヒューズピッチを狭くすることができる。
Further, since the fuse for fuse (C) blows by applying an electric current, it does not require the precision of alignment between the laser and the fuse unlike the fuse for laser blow of (B).
The fuse pitch can be narrowed.

【0015】[0015]

【発明の効果】以上説明したように、本発明は、レーザ
ー切断用ヒューズをスクライブ線上に配置し、チップ内
には溶断用ヒューズを配する為、スクライブ線上のレー
ザー切断用ヒューズはレーザーの目合精度上十分なヒュ
ーズピッチがとれ、さらにチップ内の溶断用ヒューズは
ヒューズピッチを小さくできるので、チップ面積を小さ
くできるという効果を有する。
As described above, in the present invention, the laser cutting fuse is arranged on the scribe line and the fusing fuse is arranged in the chip. A sufficient fuse pitch can be obtained in terms of accuracy, and since the fuse fuse in the chip can have a small fuse pitch, it has an effect of reducing the chip area.

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

【図1】(A)、(B)、(C)はそれぞれ本発明の一
実施例の回路図、レーザーカット用ヒューズのレイアウ
ト図、溶断用ヒューズのレイアウト図である。
1A, 1B, and 1C are a circuit diagram, a layout diagram of a laser cutting fuse, and a layout diagram of a fusing fuse, respectively, according to an embodiment of the present invention.

【図2】(A)、(B)は従来の半導体記憶装置の回路
図、ヒューズのレイアウト図である。
2A and 2B are a circuit diagram and a fuse layout diagram of a conventional semiconductor memory device.

【符号の説明】[Explanation of symbols]

VCC 電源電圧 REDE 冗長メモリセルイネーブル信号 TEST トリミングテストモード信号 VF トリミング印加電圧電源 1 Pch・MOSトランジスタ 3 CMOSインバータ 2,4〜9,21〜26 Nch・MOSトランジス
タ 10〜14,H1〜Hn1,27〜32 レーザー切
断用ヒューズ 15〜20,HY1〜HYn+1 溶断用ヒューズ A1T,A2T〜AnT アドレス信号 A1B,A2B〜AnB アドレスのインバート信号 R 抵抗
VCC power supply voltage REDE redundant memory cell enable signal TEST trimming test mode signal VF trimming applied voltage power supply 1 Pch / MOS transistor 3 CMOS inverter 2, 4-9, 21-26 Nch-MOS transistor 10-14, H1-Hn1, 27- 32 Laser cutting fuse 15 to 20, HY1 to HYn + 1 Fusing fuse A1T, A2T to AnT address signal A1B, A2B to AnB address invert signal R resistance

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 冗長メモリセルを有し、この冗長メモリ
セルの選択をヒューズ切断にて行う半導体記憶装置にお
いて、レーザー切断にてトリミングを行うヒューズをス
クライブ線に配置し、このスクライブ線のトリミングさ
れたヒューズによってプログラムされたデータに基づ
き、チップ内の溶断用ヒューズを電気的に溶断する溶断
用ヒューズを備えることを特徴とする半導体記憶装置。
1. A semiconductor memory device having redundant memory cells, wherein fuses for selecting the redundant memory cells are cut by fuses, fuses for trimming by laser cutting are arranged on scribe lines, and the scribe lines are trimmed. A semiconductor memory device comprising a fusing fuse that electrically fuses a fusing fuse in a chip based on data programmed by the fuse.
JP5108648A 1993-05-11 1993-05-11 Semiconductor storage device Expired - Lifetime JP3056019B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5108648A JP3056019B2 (en) 1993-05-11 1993-05-11 Semiconductor storage device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5108648A JP3056019B2 (en) 1993-05-11 1993-05-11 Semiconductor storage device

Publications (2)

Publication Number Publication Date
JPH06325589A true JPH06325589A (en) 1994-11-25
JP3056019B2 JP3056019B2 (en) 2000-06-26

Family

ID=14490140

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5108648A Expired - Lifetime JP3056019B2 (en) 1993-05-11 1993-05-11 Semiconductor storage device

Country Status (1)

Country Link
JP (1) JP3056019B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6288436B1 (en) 1999-07-27 2001-09-11 International Business Machines Corporation Mixed fuse technologies
US6411556B1 (en) 1999-09-30 2002-06-25 Mitsubishi Denki Kabushiki Kaisha Semiconductor memory device with improved layout and redundancy determining circuits

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6288436B1 (en) 1999-07-27 2001-09-11 International Business Machines Corporation Mixed fuse technologies
US6411556B1 (en) 1999-09-30 2002-06-25 Mitsubishi Denki Kabushiki Kaisha Semiconductor memory device with improved layout and redundancy determining circuits

Also Published As

Publication number Publication date
JP3056019B2 (en) 2000-06-26

Similar Documents

Publication Publication Date Title
US5424672A (en) Low current redundancy fuse assembly
EP0355768A2 (en) Semiconductor memory cells and semiconductor memory device employing the semiconductor memory cells
KR910001533B1 (en) Semiconductor device having fuse circuit and detecting circuit for detecting states of fuses in the fuse circuit
KR940010274A (en) Semiconductor integrated circuit
DE69324328D1 (en) Fuse circuit for integrated circuit
US4635232A (en) Semiconductor memory device
JPS60170100A (en) Cmos semiconductor integrated circuit
JPS59140700A (en) Redundant line for ic memory
JPS63166094A (en) Integrated circuit with switching element for switching over to redundancy element within memory
US5610865A (en) Semiconductor memory device with redundancy structure
US4571706A (en) Semiconductor memory device
US4761767A (en) High reliability integrated circuit memory
WO1985004966A1 (en) Cmos spare circuit
JPH06325589A (en) Semiconductor storage device
US4707810A (en) Integrated circuit memory
KR100487914B1 (en) Anti-Fuse Stabilization Circuit
JPS59124098A (en) Redundant decoder of semiconductor memory
JP3020561B2 (en) Semiconductor storage device
JPH0219560B2 (en)
JPS6266500A (en) Semiconductor storage device
JP3103163B2 (en) Non-volatile semiconductor memory circuit
JP2597828B2 (en) Semiconductor memory device
KR940006921B1 (en) Second replacement circuit of defective memory cell in semiconductor memory device
KR950011729B1 (en) Redundancy signature of semiconductor memory
JP2689808B2 (en) Nonvolatile semiconductor memory device

Legal Events

Date Code Title Description
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20000328