JPH06252144A - Manufacture of semiconductor device - Google Patents

Manufacture of semiconductor device

Info

Publication number
JPH06252144A
JPH06252144A JP5039592A JP3959293A JPH06252144A JP H06252144 A JPH06252144 A JP H06252144A JP 5039592 A JP5039592 A JP 5039592A JP 3959293 A JP3959293 A JP 3959293A JP H06252144 A JPH06252144 A JP H06252144A
Authority
JP
Japan
Prior art keywords
aluminum
aluminum wiring
resist
wiring
semiconductor substrate
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
JP5039592A
Other languages
Japanese (ja)
Inventor
Jun Aoe
潤 青江
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electronics 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 Matsushita Electronics Corp filed Critical Matsushita Electronics Corp
Priority to JP5039592A priority Critical patent/JPH06252144A/en
Publication of JPH06252144A publication Critical patent/JPH06252144A/en
Pending legal-status Critical Current

Links

Landscapes

  • Internal Circuitry In Semiconductor Integrated Circuit Devices (AREA)
  • Cleaning Or Drying Semiconductors (AREA)

Abstract

PURPOSE:To provide a method for the manufacture of semiconductor devices which prevents aluminum corrosion in aluminum wiring. CONSTITUTION:An aluminum wiring 3 is formed on a semiconductor substrate 1 by etching, and resist is removed from the wiring 3 by wet processing. The substrate 1 is then cleaned in a rinsing bath 7 placed in a position where an illuminance of 35 luxes or below is maintained using fluorescent lamps having a wavelength of 300-700nm. This reduces the electromotive force of a local battery constituted of the aluminum wiring 3 and the elements within the semiconductor substrate 1, suppresses the reducing reaction of aluminum and thus prevents aluminum corrosion.

Description

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

【0001】[0001]

【産業上の利用分野】本発明はアルミニウム配線を備え
た半導体装置の製造方法に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a semiconductor device having aluminum wiring.

【0002】[0002]

【従来の技術】近年、半導体集積回路の高集積化により
アルミニウム配線の微細化、高精度化が進み、アルミニ
ウム配線の信頼性確保が重要となってきた。
2. Description of the Related Art In recent years, as the degree of integration of semiconductor integrated circuits has become higher, the miniaturization and precision of aluminum wiring have advanced, and it has become important to secure the reliability of aluminum wiring.

【0003】以下に従来の半導体装置の製造方法につい
て説明する。図2は従来の半導体装置の製造方法のアル
ミニウム配線形成工程のウェット処理によるレジスト除
去後の水洗処理中の模式図であり、1は半導体基板、2
はフィールド酸化膜、3はアルミニウム配線、4は半導
体基板内の素子とアルミニウム配線で形成された局部電
池の陰極部分、5はアルミニウム配線の腐食、6は純
水、7は水洗処理用バス、8はクリーンベンチとクリー
ンルームの蛍光灯照明による光エネルギーである。
A conventional method of manufacturing a semiconductor device will be described below. FIG. 2 is a schematic view of a conventional semiconductor device manufacturing method during a water washing process after resist removal by a wet process in an aluminum wiring forming step.
Is a field oxide film, 3 is an aluminum wiring, 4 is a cathode portion of a local battery formed by an element in a semiconductor substrate and aluminum wiring, 5 is corrosion of aluminum wiring, 6 is pure water, 7 is a bath for washing treatment, 8 Is the light energy from fluorescent lighting in clean benches and clean rooms.

【0004】従来の半導体装置のアルミニウム配線の製
造方法は、所定の素子を形成した半導体基板1に被着し
たフィールド酸化膜2の上にアルミニウムまたは少量の
シリコンや銅を混入した合金を被着し、露光装置により
パターニングされたレジストをマスクとしてドライエッ
チングまたはウェットエッチングによりアルミニウム配
線3を形成する。次に、アルミニウム配線上のレジスト
を酸化プラズマなどのドライアッシング処理し、次に発
煙硝酸や市販のレジスト除去液によりレジストを完全に
除去した後に、純水による水洗処理で洗浄する。このレ
ジスト除去後の水洗処理用バス7はクリーンベンチ内に
設置され、300nm〜700nmの波長をもつ蛍光灯
を使用したクリーンベンチの照明とクリーンルームの照
明により水洗処理用バス7の設置位置の照度は100ル
クス以上に保たれている。
In the conventional method for manufacturing aluminum wiring of a semiconductor device, aluminum or an alloy containing a small amount of silicon or copper is deposited on the field oxide film 2 deposited on the semiconductor substrate 1 on which predetermined elements are formed. The aluminum wiring 3 is formed by dry etching or wet etching using the resist patterned by the exposure device as a mask. Next, the resist on the aluminum wiring is subjected to a dry ashing process such as oxidation plasma, and then the resist is completely removed with fuming nitric acid or a commercially available resist removing solution, and then washed with pure water. The bath 7 for washing treatment after the removal of the resist is installed in a clean bench, and the illumination at the installation position of the bath 7 for washing treatment is controlled by the illumination of the clean bench using the fluorescent lamp having a wavelength of 300 nm to 700 nm and the illumination of the clean room. It is kept above 100 lux.

【0005】[0005]

【発明が解決しようとする課題】しかしながら上記の従
来の構成では、アルミニウム配線が形成されることによ
り、半導体基板内の素子がアルミニウム配線で接続され
内部回路が形成されて局部電池構造となり陰極部分4と
陽極部分が発生する。レジスト除去後の水洗処理中にク
リーンベンチとクリーンルームの蛍光灯による照明の光
エネルギー8により局部電池の起電力が増幅され、水洗
が進行し水洗処理の純水6の比抵抗が増加すると純水6
中への放電が抑制され、この起電力がアルミニウム配線
と半導体基板内の素子の間の局部電池に蓄積される。そ
の結果、アルミニウム配線3の陰極部分4と純水6の接
する部分で電子の供給が増加し、酸素の還元と水素の発
生により陰極部分近傍のOH-イオン濃度が増加する。
その結果、OH-イオンとアルミニウムが反応してAl
(OH)3が生成され、アルミニウム配線の腐食が発生
するという欠点を有していた。また、塩素系のガスを使
用したドライエッチングでアルミニウムをエッチングし
アルミニウム配線を形成した場合、塩素イオンが残留し
ているとさらにアルミニウム腐食の化学反応は促進され
る。
However, in the above conventional structure, the aluminum wiring is formed, so that the elements in the semiconductor substrate are connected by the aluminum wiring and the internal circuit is formed to form the local battery structure to form the cathode portion 4. And the anode part is generated. During the rinsing process after removing the resist, the electromotive force of the local battery is amplified by the light energy 8 of the fluorescent light in the clean bench and the clean room, and the rinsing proceeds to increase the specific resistance of the pure water 6 in the rinsing process.
Discharge to the inside is suppressed, and this electromotive force is accumulated in the local battery between the aluminum wiring and the element in the semiconductor substrate. As a result, the supply of electrons increases at the portion where the cathode portion 4 of the aluminum wiring 3 and the pure water 6 contact each other, and the OH ion concentration near the cathode portion increases due to the reduction of oxygen and the generation of hydrogen.
As a result, OH ions react with aluminum and Al
It has a defect that (OH) 3 is generated and corrosion of aluminum wiring occurs. Further, when aluminum is etched by dry etching using chlorine-based gas to form aluminum wiring, residual chlorine ions further accelerate the chemical reaction of aluminum corrosion.

【0006】本発明は上記従来の問題点を解決するもの
でアルミニウム腐食を防止することのできる半導体装置
の製造方法を提供することを目的とする。
An object of the present invention is to solve the above conventional problems and to provide a method of manufacturing a semiconductor device capable of preventing aluminum corrosion.

【0007】[0007]

【課題を解決するための手段】この目的を達成するため
に本発明の半導体装置の製造方法は、クリーンルーム内
で照度が35ルクス以下の場所に設置した水洗バスでア
ルミニウム配線形成工程のウェット処理によるレジスト
除去処理後の水洗処理を実施する工程を備えている。
In order to achieve this object, a method of manufacturing a semiconductor device according to the present invention uses a wet process in an aluminum wiring forming step in a washing bath installed in a clean room at an illuminance of 35 lux or less. A step of performing a water washing treatment after the resist removing treatment is provided.

【0008】[0008]

【作用】この構成によってウェット処理によるレジスト
除去後の水洗処理中に、半導体基板とアルミニウム配線
が受けるクリーンベンチとクリーンルーム内の蛍光灯照
明からの光エネルギーが低減され、半導体基板の素子と
アルミニウム配線により形成された内部回路による局部
電池に発生する起電力を小さく抑えることができ、アル
ミニウム配線の陰極部分でおきる還元反応が抑制されO
-イオンとアルミニウムの化学反応によるアルミニウ
ム配線の腐食を防止することができる。
With this configuration, the light energy from the fluorescent lamp in the clean bench and the clean room, which is received by the semiconductor substrate and the aluminum wiring, is reduced during the water washing treatment after the resist removal by the wet treatment. The electromotive force generated in the local battery by the formed internal circuit can be suppressed to a small level, and the reduction reaction occurring at the cathode portion of the aluminum wiring is suppressed.
It is possible to prevent corrosion of aluminum wiring due to a chemical reaction between H ions and aluminum.

【0009】[0009]

【実施例】以下本発明の一実施例について、図面を参照
しながら説明する。
DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

【0010】図1は本発明の一実施例における半導体装
置の製造方法のアルミニウム配線形成工程のウェットに
よるレジスト除去後の水洗処理中の模式図であり、1は
半導体基板、2はフィールド酸化膜、3はアルミニウム
配線、4は半導体基板内の素子とアルミニウム配線で形
成された局部電池の陰極部分、6は純水、7は水洗処理
用バス、8はクリーンベンチとクリーンルームの蛍光灯
照明による光エネルギーである。
FIG. 1 is a schematic diagram showing a process of washing with water after resist removal by wet in an aluminum wiring forming step of a method of manufacturing a semiconductor device according to an embodiment of the present invention, in which 1 is a semiconductor substrate, 2 is a field oxide film, Reference numeral 3 is aluminum wiring, 4 is a cathode portion of a local battery formed by an element in a semiconductor substrate and aluminum wiring, 6 is pure water, 7 is a bath for washing treatment, 8 is light energy by fluorescent lamp illumination in a clean bench and a clean room. Is.

【0011】以上のように構成された本実施例の半導体
装置の製造方法について以下その動作を説明する。ま
ず、所定の素子を形成した半導体基板1に被着したフィ
ールド酸化膜2の上にアルミニウムまたは少量のシリコ
ンや銅を混入した合金膜を被着する。次に、露光装置に
よりパターニングされたレジストをマスクとしてドライ
エッチングまたはウェットエッチングによりアルミニウ
ム配線3を形成する。次に、アルミニウム配線3上のレ
ジストを酸化プラズマなどのドライアッシングの後、発
煙硝酸や市販のレジスト除去液でレジストを除去した
後、300nm〜700nmの波長を持つ蛍光灯による
クリーンベンチやクリーンルームの照明を35ルクス以
下に保持した位置に設置した水洗処理用バス7を使用し
て純水6による水洗処理にて洗浄をする。この水洗処理
は水洗処理用バス7内の純水6の比抵抗で管理され、純
水6の比抵抗が10〜15MΩ以上となるまで処理され
る。
The operation of the method of manufacturing the semiconductor device having the above-described structure according to this embodiment will be described below. First, aluminum or an alloy film containing a small amount of silicon or copper mixed is deposited on the field oxide film 2 deposited on the semiconductor substrate 1 on which predetermined elements are formed. Next, the aluminum wiring 3 is formed by dry etching or wet etching using the resist patterned by the exposure device as a mask. Next, after dry ashing the resist on the aluminum wiring 3 with oxidizing plasma, etc., after removing the resist with fuming nitric acid or a commercially available resist removing liquid, lighting of a clean bench or a clean room with a fluorescent lamp having a wavelength of 300 nm to 700 nm is performed. Is washed with pure water 6 by using a bath 7 for washing treatment installed at a position where is kept at 35 lux or less. This washing process is controlled by the specific resistance of the pure water 6 in the washing bath 7, and the pure water 6 is processed until the specific resistance becomes 10 to 15 MΩ or more.

【0012】以上のように本実施例によれば、高抵抗の
純水6中で水洗処理する水洗処理用バス7を300nm
〜700nmの波長のクリーンベンチやクリーンルーム
の蛍光灯の照度を35ルクス以下に保持した位置に設置
したことにより、クリーンベンチやクリーンルームの蛍
光灯から受ける光エネルギー8を低減し、半導体基板内
の素子とアルミニウム配線で形成される局部電池の起電
力を低く抑え、アルミニウム配線3の陰極部分4への電
子の供給を抑制することにより、アルミニウム配線3の
陰極部分4と純水6の接する部分で発生するOH-イオ
ンとアルミニウムの反応からAl(OH)3の生成する
還元反応を抑止し、アルミニウム配線の腐食を防止する
ことができる。
As described above, according to this embodiment, the washing bath 7 for washing in the high-resistance pure water 6 is set to 300 nm.
By installing it in a position where the illuminance of a fluorescent lamp in a clean bench or a clean room with a wavelength of ~ 700 nm is kept at 35 lux or less, the light energy 8 received from the fluorescent lamp in the clean bench or clean room is reduced, and By suppressing the electromotive force of the local battery formed by the aluminum wiring and suppressing the supply of electrons to the cathode portion 4 of the aluminum wiring 3, it is generated at the portion where the cathode portion 4 of the aluminum wiring 3 and the pure water 6 are in contact with each other. It is possible to suppress the reduction reaction of Al (OH) 3 generated from the reaction of OH ions and aluminum, and prevent the corrosion of aluminum wiring.

【0013】なお、本実施例ではアルミニウム配線を1
層配線としたが、アルミニウム配線は多層配線構造の2
層目以降のアルミニウム配線でもよい。
In this embodiment, the aluminum wiring is 1
Layer wiring was used, but aluminum wiring has a multilayer wiring structure.
The aluminum wiring in the layer onward may be used.

【0014】[0014]

【発明の効果】以上のように本発明はアルミニウム配線
形成工程のレジスト除去後の水洗処理を300nm〜7
00nmの波長をもつ蛍光灯照明による照度を35ルク
ス以下の位置に設置したバスで処理することにより、エ
ッチング方法やレジスト除去方法など大幅な工程を変更
することなく作業性に影響を与えない方法で、アルミニ
ウム配線の腐食を防止することができる優れた半導体装
置の製造方法を実現できるものである。
As described above, according to the present invention, the washing process after removing the resist in the aluminum wiring forming step is performed in the range of 300 nm to 7 nm.
By processing the illuminance by fluorescent lamp illumination with a wavelength of 00 nm with a bath installed at a position of 35 lux or less, a method that does not affect workability without significantly changing the etching method or resist removal method. Therefore, it is possible to realize an excellent method for manufacturing a semiconductor device capable of preventing corrosion of aluminum wiring.

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

【図1】本発明の一実施例におけるレジスト除去後の水
洗処理中の模式図
FIG. 1 is a schematic diagram during a water washing process after resist removal according to an embodiment of the present invention.

【図2】従来の方法におけるレジスト除去後の水洗処理
中の模式図
FIG. 2 is a schematic diagram during a water washing process after resist removal in a conventional method.

【符号の説明】[Explanation of symbols]

1 半導体基板 2 フィールド酸化膜 3 アルミニウム配線 4 半導体基板1内の素子とアルミニウム配線3で形成
された局部電池の陰極部分 5 アルミニウム配線の腐食 6 純水 7 水洗処理用バス 8 クリーンベンチとクリーンルームの蛍光灯照明によ
る光エネルギー
1 Semiconductor Substrate 2 Field Oxide Film 3 Aluminum Wiring 4 Cathode Part of Local Battery Formed by Elements in Semiconductor Substrate 1 and Aluminum Wiring 3 Corrosion of Aluminum Wiring 6 Pure Water 7 Bath for Washing Treatment 8 Fluorescence in Clean Bench and Clean Room Light energy from lamp lighting

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】半導体基板上のアルミニウムまたは少量の
シリコンや銅を混入したアルミニウム合金膜上のレジス
トに露光装置によりアルミニウム配線のレジストパター
ンを形成する工程と、前記レジストパターンをもとにし
た前記アルミニウムまたは少量のシリコンや銅を混入し
たアルミニウム合金膜のエッチング工程と、前記エッチ
ング工程にて形成したアルミニウム配線上のレジストを
ドライ処理とウェット処理の併用またはウェット処理の
みでレジスト除去した後に、300〜700nmの波長
をもつ蛍光灯照明の照度を35ルクス以下に保持した位
置に設置した水洗処理用バスで洗浄する工程とを備えた
半導体装置の製造方法。
1. A step of forming a resist pattern of aluminum wiring on a resist on an aluminum alloy film containing aluminum or a small amount of silicon or copper on a semiconductor substrate by an exposure apparatus, and the aluminum based on the resist pattern. Alternatively, after etching the aluminum alloy film mixed with a small amount of silicon or copper and removing the resist on the aluminum wiring formed in the etching process by dry treatment and wet treatment in combination or only by wet treatment, 300 to 700 nm And a step of washing with a water bath for washing treatment installed at a position where the illuminance of fluorescent lamp illumination having the wavelength of 5 is kept at 35 lux or less.
JP5039592A 1993-03-01 1993-03-01 Manufacture of semiconductor device Pending JPH06252144A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5039592A JPH06252144A (en) 1993-03-01 1993-03-01 Manufacture of semiconductor device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5039592A JPH06252144A (en) 1993-03-01 1993-03-01 Manufacture of semiconductor device

Publications (1)

Publication Number Publication Date
JPH06252144A true JPH06252144A (en) 1994-09-09

Family

ID=12557381

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5039592A Pending JPH06252144A (en) 1993-03-01 1993-03-01 Manufacture of semiconductor device

Country Status (1)

Country Link
JP (1) JPH06252144A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004200707A (en) * 2004-01-30 2004-07-15 Renesas Technology Corp Method for manufacturing semiconductor integrated circuit device
WO2006008829A1 (en) * 2004-07-22 2006-01-26 Renesas Technology Corp. Process for producing semiconductor device
US7510970B2 (en) 1998-07-24 2009-03-31 Renesas Technology Corp. Process for manufacturing semiconductor integrated circuit device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7510970B2 (en) 1998-07-24 2009-03-31 Renesas Technology Corp. Process for manufacturing semiconductor integrated circuit device
US7659201B2 (en) 1998-07-24 2010-02-09 Renesas Technology Corp. Process for manufacturing semiconductor integrated circuit device
JP2004200707A (en) * 2004-01-30 2004-07-15 Renesas Technology Corp Method for manufacturing semiconductor integrated circuit device
WO2006008829A1 (en) * 2004-07-22 2006-01-26 Renesas Technology Corp. Process for producing semiconductor device
US7998793B2 (en) 2004-07-22 2011-08-16 Renesas Electronics Corporation Light illumination during wafer dicing to prevent aluminum corrosion

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