JPH06120426A - Semiconductor integrated circuit - Google Patents

Semiconductor integrated circuit

Info

Publication number
JPH06120426A
JPH06120426A JP4264458A JP26445892A JPH06120426A JP H06120426 A JPH06120426 A JP H06120426A JP 4264458 A JP4264458 A JP 4264458A JP 26445892 A JP26445892 A JP 26445892A JP H06120426 A JPH06120426 A JP H06120426A
Authority
JP
Japan
Prior art keywords
connect pin
diode
cathode
anode
pad
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.)
Withdrawn
Application number
JP4264458A
Other languages
Japanese (ja)
Inventor
Itaru Wachi
到 和知
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 IC Microcomputer Systems Co Ltd
Original Assignee
NEC IC Microcomputer Systems Co 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 IC Microcomputer Systems Co Ltd filed Critical NEC IC Microcomputer Systems Co Ltd
Priority to JP4264458A priority Critical patent/JPH06120426A/en
Publication of JPH06120426A publication Critical patent/JPH06120426A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L2224/02Bonding areas; Manufacturing methods related thereto
    • H01L2224/04Structure, shape, material or disposition of the bonding areas prior to the connecting process
    • H01L2224/05Structure, shape, material or disposition of the bonding areas prior to the connecting process of an individual bonding area
    • H01L2224/0554External layer
    • H01L2224/0555Shape
    • H01L2224/05552Shape in top view
    • H01L2224/05554Shape in top view being square

Abstract

PURPOSE:To provide a highly reliable IC without destroying the insulator between the pads and the IC substrate by connecting a protection diode circuit to a non-connect pin in a master slice IC. CONSTITUTION:The pads 3 on a semiconductor chip 1 are connected to bonding wires 2, but in an IC having a non-connect pin 6 which is not connected to an unused I/O section 5, there are provided a first diode D1 which is connected from the cathode through the anode thereof to a power supply through the input terminal 9 of a non-connect pin 6, and a second diode D2 which is connected from the anode through cathode thereof to the ground.

Description

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

【0001】[0001]

【産業上の利用分野】本発明は半導体集積回路に関し、
特にマスタースライス方式の半導体集積回路に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a semiconductor integrated circuit,
In particular, the present invention relates to a master slice type semiconductor integrated circuit.

【0002】[0002]

【従来の技術】一般に、マスタースライス方式の半導体
集積回路(以下、ICと記す)は、コードにより未使用
ピンの存在位置が異なることから未使用ピンにボンディ
ングを行なわないためには専用のボンディングテープを
用意するなどコード開発工数が増加し、好ましくないた
め共通の全ピンボンディングを行なっている。そのた
め、図3に示すように、ボンディングワイヤ2がパッド
3に接続されているだけで、未使用I/O部5には配線
されていないノンコネクトピン6が存在する場合があ
り、ノンコネクトピン6はフローティング状態であるた
め保護ダイオード回路7を備えていない。また、ボンデ
ィングワイヤ2がパッド3に接続されていてパッド3か
ら使用I/O部4に配線されている場合は保護ダイオー
ド回路7を備えている。
2. Description of the Related Art Generally, a master slice type semiconductor integrated circuit (hereinafter referred to as an IC) has a dedicated bonding tape in order to prevent bonding to unused pins because the positions of unused pins differ depending on the code. The number of man-hours for code development has increased, such as by preparing, and it is not preferable, so common pin bonding is performed. Therefore, as shown in FIG. 3, there may be a non-connect pin 6 that is not wired in the unused I / O section 5 only when the bonding wire 2 is connected to the pad 3. Since 6 is in a floating state, the protection diode circuit 7 is not provided. Further, when the bonding wire 2 is connected to the pad 3 and is wired from the pad 3 to the used I / O unit 4, the protection diode circuit 7 is provided.

【0003】[0003]

【発明が解決しようとする課題】前述の従来のマスター
スライス方式のICにおいて、コネクトピンに大きな電
圧が印加され、かつ、ノンコネクトピンがコネクトピン
に隣接している場合にはリードフレームやボンディング
ワイヤのもつ相互インダクタンスにより大きな電圧が誘
起される。また、ノンコネクトピンはフローティング状
態であるため、大きな電圧が加わっても電荷の逃げる経
路がないので、ノンコネクトピンのパッドとIC基盤と
の間の絶縁体を破壊し、ICの信頼性を低下させるとい
う問題点があった。
In the above-mentioned conventional master slice type IC, when a large voltage is applied to the connect pin and the non-connect pin is adjacent to the connect pin, a lead frame or a bonding wire is provided. A large voltage is induced by the mutual inductance of the. In addition, since the non-connect pin is in a floating state, there is no path for the charge to escape even when a large voltage is applied, so the insulator between the pad of the non-connect pin and the IC substrate is destroyed, and the reliability of the IC decreases. There was a problem of making it.

【0004】同様にノンコネクトピンに大きな電圧が印
加された場合においてもノンコネクトピンのパッドとI
C基盤との間の絶縁体を破壊し、ICの信頼性を低下さ
せるという問題点があった。
Similarly, even when a large voltage is applied to the non-connect pin, the pad of the non-connect pin and the I
There is a problem that the insulator between the C substrate is destroyed and the reliability of the IC is reduced.

【0005】本発明の目的は、ノンコネクトピンとIC
基盤との間の絶縁体の破壊がなく、信頼性の高いICを
提供することにある。
An object of the present invention is to connect non-connect pins and ICs.
The purpose of the present invention is to provide a highly reliable IC without the breakdown of the insulator between the base and the substrate.

【0006】[0006]

【課題を解決するための手段】本発明は、半導体チップ
と、該半導体チップ上のパッドと、該パッドに接続され
たボンディングワイヤと保護ダイオード回路を介して使
用I/O部に接続するコネクトピンと、未使用I/O部
に接続されていないノンコネクトピンとを有するマスタ
ースライス方式の半導体集積回路において、前記ノンコ
ネクトピンの入力端子をカソードからアノードを通して
電源に接続する第1のダイオードとアノードからのカソ
ードを通して接地に接続する第2のダイオードを備えた
保護ダイオード回路と、アノードからカソードを通して
接地に接続するダイオードのみを備えた保護ダイオード
回路とのうちのいずれか一方の保護ダイオード回路を介
して前記未使用I/O部に接続する。
According to the present invention, there is provided a semiconductor chip, a pad on the semiconductor chip, a bonding wire connected to the pad, and a connect pin connected to a used I / O section via a protection diode circuit. In a master slice type semiconductor integrated circuit having a non-connect pin not connected to an unused I / O part, a first diode connecting an input terminal of the non-connect pin from a cathode through an anode to a power supply and an anode The protection diode circuit having a second diode connected to the ground through the cathode and the protection diode circuit having only the diode connected to the ground through the cathode from the anode are connected via the protection diode circuit. Connect to the used I / O part.

【0007】[0007]

【実施例】次に、本発明の実施例について図面を参照し
て説明する。
Embodiments of the present invention will now be described with reference to the drawings.

【0008】図1(A),(B)は本発明の第1の実施
例の半導体チップの部分拡大平面図及びその保護ダイオ
ード回路の回路図である。
1A and 1B are a partially enlarged plan view of a semiconductor chip according to a first embodiment of the present invention and a circuit diagram of its protection diode circuit.

【0009】第1の実施例は、図1(A),(B)に示
すように、ボンディングワイヤ2は半導体チップ1上の
パッド3に接続されていてパッド3は保護ダイオード回
路7を備えた使用I/O部4に配線されていて、かつ、
保護ダイオード回路7を備えた未使用I/O部5にも配
線されている。入力端子9は、電源側のダイオードD1
と接地側のダイオードD2に入力されていてダイオード
D1のカソードからアノードを通して電源に接続し、ダ
イオードD2のアノードからカソードを通して接地に接
続している。
In the first embodiment, as shown in FIGS. 1A and 1B, the bonding wire 2 is connected to the pad 3 on the semiconductor chip 1, and the pad 3 is provided with the protection diode circuit 7. Wired to the used I / O unit 4, and
It is also wired to the unused I / O unit 5 including the protection diode circuit 7. The input terminal 9 is a diode D1 on the power supply side.
The diode D2 on the ground side is connected to the power supply through the cathode of the diode D1 through the anode, and is connected to the ground through the anode and cathode of the diode D2.

【0010】次に、第1の実施例の動作について説明す
る。
Next, the operation of the first embodiment will be described.

【0011】大きな電圧を印加されたコネクトピン8に
隣接するノンコネクトピン6は、リードフレームやボン
ディングワイヤ2のもつ相互インダクタンスにより大き
な電圧が誘起されるが、入力端子9を介してダイオード
D1を通し電源側の接地点へ電荷が流動されるかまたは
ダイオードD2を通し接地側の接地点へ電荷が誘導され
て、絶縁体の破壊に至らない。同様にノンコネクトピン
6に大きな電圧が印加された場合でも絶縁体の破壊に至
らない。
A large voltage is induced in the non-connect pin 6 adjacent to the connect pin 8 to which a large voltage is applied by the mutual inductance of the lead frame and the bonding wire 2, but the diode D1 is passed through the input terminal 9 through the diode D1. The electric charge does not flow to the ground point on the power source side or the electric charge is induced to the ground point on the ground side through the diode D2, and the insulator is not destroyed. Similarly, even if a large voltage is applied to the non-connect pin 6, the insulator will not be destroyed.

【0012】図2は本発明の第2の実施例の保護ダイオ
ード回路の回路図である。
FIG. 2 is a circuit diagram of a protection diode circuit according to the second embodiment of the present invention.

【0013】第2の実施例は、図2に示すように、入力
端子10は接地側のダイオードD3に入力されていてダ
イオードD3のアノードからカソードを通して接地に接
続している。
In the second embodiment, as shown in FIG. 2, the input terminal 10 is input to the diode D3 on the ground side and is connected to the ground through the anode and cathode of the diode D3.

【0014】次に、第2の実施例の動作について説明す
る。
Next, the operation of the second embodiment will be described.

【0015】大きな電圧を印加されたコネクトピン8に
隣接するノンコネクトピン6は、リードフレームやボン
ディングワイヤ2のもつ相互インダクタンスにより大き
な電圧が誘起されるが、入力端子10を介してダイオー
ドD3を通し、接地へ電荷が誘導されて、絶縁体の破壊
に至らない。同様にノンコネクトピン6に大きな電圧が
印加された場合でも絶縁体の破壊に至らない。
A large voltage is induced in the non-connect pin 6 adjacent to the connect pin 8 to which a large voltage is applied, due to the mutual inductance of the lead frame and the bonding wire 2, but the diode D3 is passed through the input terminal 10. , Electric charge is induced to the ground, and the insulator is not destroyed. Similarly, even if a large voltage is applied to the non-connect pin 6, the insulator will not be destroyed.

【0016】また、ダイオードD1,D2,D3の面積
は、例えば各800μm2 に設定し、従来の使用I/O
部4内に備えている保護ダイオード回路7そのものを使
い、例えば、4,500Vの電圧をコネクトピン8に印
加した場合、ノンコネクトピン6の未使用I/O部5に
保護ダイオード回路7がなかった場合、ノンコネクトピ
ン6のパッド3とIC基盤との間の絶縁体を破壊し、I
Cの信頼性を低下させるのに対して、保護ダイオード回
路7を備えている場合は、ノンコネクトピン6のパッド
3とIC基盤との間の絶縁体を破壊することがなく、信
頼性の高いICを提供することができる。
The areas of the diodes D1, D2 and D3 are set to 800 μm 2 for each, and the conventional I / O used.
When the protection diode circuit 7 itself provided in the section 4 is used and, for example, a voltage of 4,500 V is applied to the connect pin 8, there is no protection diode circuit 7 in the unused I / O section 5 of the non-connect pin 6. In case of damage, the insulator between the pad 3 of the non-connect pin 6 and the IC substrate is destroyed, and I
On the other hand, when the protection diode circuit 7 is provided, the reliability of C is lowered, but the insulator between the pad 3 of the non-connect pin 6 and the IC substrate is not destroyed, and the reliability is high. An IC can be provided.

【0017】[0017]

【発明の効果】以上の説明で明らかな如く、本発明のI
Cによれば、コネクトピンに大きな電圧が印加され、ノ
ンコネクトピンがコネクトピンに隣接して配置された場
合には、リードフレームやボンディングワイヤのもつ相
互インダクタンスにより大きな電圧が誘起されて大きな
電圧が加わってもノンコネクトピンはフローティング状
態ではないため電荷の逃げる経路があり、ノンコネクト
ピンのパッドとIC基盤との間の絶縁体を破壊すること
なく、信頼性を高める効果を得ることができる。
As is apparent from the above description, I of the present invention
According to C, when a large voltage is applied to the connect pin and the non-connect pin is arranged adjacent to the connect pin, a large voltage is induced by the mutual inductance of the lead frame and the bonding wire, and a large voltage is generated. Even if added, the non-connect pin is not in a floating state, so that there is a path for electric charge to escape, and the effect of improving reliability can be obtained without destroying the insulator between the pad of the non-connect pin and the IC substrate.

【0018】同様に、ノンコネクトピンに大きな電圧が
印加された場合においても、ノンコネクトピンのパッド
とIC基盤との間の絶縁体を破壊することなく信頼性を
高める効果を得ることができる。
Similarly, even when a large voltage is applied to the non-connect pin, the effect of improving reliability can be obtained without destroying the insulator between the pad of the non-connect pin and the IC substrate.

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

【図1】本発明の第1の実施例の半導体チップの部分拡
大平面図及びその保護ダイオード回路の回路図である。
FIG. 1 is a partially enlarged plan view of a semiconductor chip of a first embodiment of the present invention and a circuit diagram of its protection diode circuit.

【図2】本発明の第2の実施例の半導体チップの保護ダ
イオード回路の回路図である。
FIG. 2 is a circuit diagram of a protection diode circuit of a semiconductor chip according to a second embodiment of the present invention.

【図3】従来のICの半導体チップの部分拡大平面図で
ある。
FIG. 3 is a partially enlarged plan view of a semiconductor chip of a conventional IC.

【符号の説明】[Explanation of symbols]

1 半導体チップ 2 ボンディングワイヤ 3 パッド 4 使用I/O部 5 未使用I/O部 6 ノンコネクトピン 7 保護ダイオード回路 8 コネクトピン 9,10 入力端子 D1,D2,D3 ダイオード 1 Semiconductor Chip 2 Bonding Wire 3 Pad 4 Used I / O Section 5 Unused I / O Section 6 Non-Connect Pin 7 Protective Diode Circuit 8 Connect Pin 9, 10 Input Terminal D1, D2, D3 Diode

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 半導体チップと、該半導体チップ上のパ
ッドと、該パッドに接続されたボンディングワイヤと保
護ダイオード回路を介して使用I/O部に接続するコネ
クトピンと、未使用I/O部に接続されていないノンコ
ネクトピンとを有するマスタースライス方式の半導体集
積回路において、前記ノンコネクトピンの入力端子をカ
ソードからアノードを通して電源に接続する第1のダイ
オードとアノードからのカソードを通して接地に接続す
る第2のダイオードを備えた保護ダイオード回路と、ア
ノードからカソードを通して接地に接続するダイオード
のみを備えた保護ダイオード回路とのうちのいずれか一
方の保護ダイオード回路を介して前記未使用I/O部に
接続したことを特徴とする半導体集積回路。
1. A semiconductor chip, a pad on the semiconductor chip, a bonding pin connected to the pad, a connect pin connected to a used I / O unit via a protection diode circuit, and an unused I / O unit. In a master-slice semiconductor integrated circuit having non-connect pins that are not connected, a second diode that connects an input terminal of the non-connect pin to a power source through a cathode and an anode and a ground through a cathode from the anode Connected to the unused I / O section via any one of a protection diode circuit including a diode and a protection diode circuit including only a diode connected from an anode to a cathode to ground. A semiconductor integrated circuit characterized by the above.
JP4264458A 1992-10-02 1992-10-02 Semiconductor integrated circuit Withdrawn JPH06120426A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4264458A JPH06120426A (en) 1992-10-02 1992-10-02 Semiconductor integrated circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4264458A JPH06120426A (en) 1992-10-02 1992-10-02 Semiconductor integrated circuit

Publications (1)

Publication Number Publication Date
JPH06120426A true JPH06120426A (en) 1994-04-28

Family

ID=17403493

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4264458A Withdrawn JPH06120426A (en) 1992-10-02 1992-10-02 Semiconductor integrated circuit

Country Status (1)

Country Link
JP (1) JPH06120426A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5742079A (en) * 1991-12-10 1998-04-21 Vlsi Technology, Inc. Integrated circuit with variable pad pitch
US6031257A (en) * 1997-06-13 2000-02-29 Hitachi, Ltd. Semiconductor integrated circuit device
US6101078A (en) * 1997-09-12 2000-08-08 Nec Corporation Semiconductor device with protection circuit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5742079A (en) * 1991-12-10 1998-04-21 Vlsi Technology, Inc. Integrated circuit with variable pad pitch
US6031257A (en) * 1997-06-13 2000-02-29 Hitachi, Ltd. Semiconductor integrated circuit device
US6101078A (en) * 1997-09-12 2000-08-08 Nec Corporation Semiconductor device with protection circuit
KR100309525B1 (en) * 1997-09-12 2001-12-17 가네꼬 히사시 Semiconductor device with protection circuit

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Effective date: 20000104