JPH10139428A - Modification of tin dioxide film - Google Patents

Modification of tin dioxide film

Info

Publication number
JPH10139428A
JPH10139428A JP28778696A JP28778696A JPH10139428A JP H10139428 A JPH10139428 A JP H10139428A JP 28778696 A JP28778696 A JP 28778696A JP 28778696 A JP28778696 A JP 28778696A JP H10139428 A JPH10139428 A JP H10139428A
Authority
JP
Japan
Prior art keywords
tin dioxide
dioxide film
gas
modifying
reaction vessel
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
JP28778696A
Other languages
Japanese (ja)
Inventor
Yoshimichi Yonekura
義道 米倉
Toshiya Watanabe
俊哉 渡辺
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 Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries 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 Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to JP28778696A priority Critical patent/JPH10139428A/en
Publication of JPH10139428A publication Critical patent/JPH10139428A/en
Pending legal-status Critical Current

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Abstract

PROBLEM TO BE SOLVED: To provide a method for modifying a tin dioxide film, enabling to simply improve the electric conductivity of the tin dioxide film. SOLUTION: This method for modifying a tin dioxide film comprises disposing a glass substrate 10 having a tin dioxide film produced by a thermal CVD method on a quartz support table 3, charging a mixture gas 11 comprising an inert gas such as nitrogen gas or argon gas and hydrogen gas (the concentration of the hydrogen gas in the mixture gas is 0.1-3mol.%) into a quartz reaction vessel 1 from a gas cylinder 5 under the adjustments of a pressure-reducing value 7, a flow meter 8, etc., to replace the inner atmosphere of the vessel 1 with the mixture gas 11, and operating a non-illustrated controller so as to heat the inner atmosphere of the reaction vessel 1 at 150-460 deg.C with a heater 2. Thus, hydroxyl groups are introduced to detective sites (uncombined hands) existing on the grain boundary surfaces of the tin dioxide film produced on the substrate 10 to inactivate the defective sites. The catch of electrons (carriers) at the defective sites can largely reduced, and the deterioration of the electric conductivity is thereby greatly suppressed.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、透明性および導電
性を有する二酸化錫膜の改質方法に関する。
The present invention relates to a method for modifying a tin dioxide film having transparency and conductivity.

【0002】[0002]

【従来の技術】透明性を有すると共に導電性を有する透
明導電膜の材料としては、二酸化錫や酸化インジウム錫
などが挙げられる。二酸化錫は、酸化インジウム錫より
も化学的耐久性が優れるため、化学的耐久性が要求され
る用途に好適であるものの、酸化インジウム錫よりも導
電性が劣るため、その導電性の向上手段が種々検討され
ている。
2. Description of the Related Art As a material of a transparent conductive film having both transparency and conductivity, there are tin dioxide and indium tin oxide. Tin dioxide has better chemical durability than indium tin oxide, so it is suitable for applications where chemical durability is required.However, since it is inferior in conductivity to indium tin oxide, a means for improving the conductivity is required. Various studies have been made.

【0003】二酸化錫の導電性の向上手段としては、例
えば、特開平6−92689号公報や特開平6−252
431号公報などに開示されたものが知られている。こ
れらは、化学蒸着法(以下「CVD法」という。)で二
酸化錫を成膜した基板を水蒸気やエタノール蒸気を含有
する雰囲気中で加熱処理し、二酸化錫膜の結晶粒界面に
存在する欠陥(未結合手)に水酸基を導入することによ
り、当該欠陥による電子(キャリア)の捕捉を防止する
ようにしたものである。
As means for improving the conductivity of tin dioxide, for example, JP-A-6-92689 and JP-A-6-252 are known.
No. 431 is known. In these methods, a substrate on which tin dioxide is formed by a chemical vapor deposition method (hereinafter, referred to as a “CVD method”) is subjected to a heat treatment in an atmosphere containing water vapor or ethanol vapor, and defects existing at crystal grain interfaces of the tin dioxide film ( By introducing a hydroxyl group into the dangling bond, the trapping of electrons (carriers) by the defect is prevented.

【0004】[0004]

【発明が解決しようとする課題】しかしながら、特開平
6−92689号公報や特開平6−252431号公報
などに開示された前述したような手段では、水やエタノ
ールの蒸気の結露を防止するように当該蒸気の分圧を精
密に制御しなければならないため、特殊な装置が必要と
なってしまい、実用化に難点があった。
However, the above-described means disclosed in Japanese Patent Application Laid-Open Nos. 6-92689 and 6-252431 prevent water and ethanol from dew condensation. Since the partial pressure of the steam must be precisely controlled, a special device is required, and there is a problem in practical use.

【0005】このようなことから、本発明は、二酸化錫
膜の導電性を簡単に向上させることができる二酸化錫膜
の改質方法を提供することを目的とした。
Accordingly, an object of the present invention is to provide a method for modifying a tin dioxide film which can easily improve the conductivity of the tin dioxide film.

【0006】[0006]

【課題を解決するための手段】前述した課題を解決する
ための、本発明による二酸化錫膜の改質方法は、二酸化
錫膜を水素ガスと不活性ガスとの混合ガスの雰囲気中で
熱処理することを特徴とする。
According to the present invention, there is provided a method for modifying a tin dioxide film, which comprises heat-treating a tin dioxide film in an atmosphere of a mixed gas of hydrogen gas and an inert gas. It is characterized by the following.

【0007】上述した二酸化錫膜の改質方法において
は、前記熱処理の温度が150〜460℃であることを
特徴とする。
In the above-described method for modifying a tin dioxide film, the temperature of the heat treatment is 150 to 460 ° C.

【0008】上述した二酸化錫膜の改質方法において
は、前記混合ガス中の前記水素ガスの割合が0.1〜3
mol%であることを特徴とする。
In the above-described method for modifying a tin dioxide film, the ratio of the hydrogen gas in the mixed gas is 0.1 to 3%.
mol%.

【0009】[作用]本発明による二酸化錫膜の改質方
法では、二酸化錫膜を水素ガスと不活性ガスとの混合ガ
スの雰囲気中で熱処理することにより、当該膜の結晶粒
界面に存在する欠陥(未結合手)に水素基を導入して当
該欠陥箇所を不活性化させ、当該欠陥による電子(キャ
リア)の捕捉を防止する、すなわち、導電率の低下を抑
えることができる。つまり、上記膜の欠陥の不活性化に
あたって水素ガスを用いるようにしたので、水蒸気やエ
タノール蒸気などを用いる場合に必要な結露防止や蒸気
分圧の制御などを行わずに済ませることができるように
したのである。
In the method for modifying a tin dioxide film according to the present invention, the tin dioxide film is heat-treated in an atmosphere of a mixed gas of hydrogen gas and an inert gas, so that the tin dioxide film is present at the crystal grain interface of the film. A hydrogen group is introduced into a defect (dangling bond) to inactivate the defect, thereby preventing capture of electrons (carriers) by the defect, that is, a decrease in conductivity can be suppressed. In other words, since hydrogen gas is used to inactivate the defects of the film, it is not necessary to perform dew condensation prevention and control of the vapor partial pressure necessary when using steam or ethanol vapor. It was done.

【0010】ここで、前記熱処理の温度が150〜46
0℃であると良好な熱処理を施すことができる。なぜな
ら、当該温度が150℃未満であると、上記膜の上記欠
陥への水素基の導入が困難となってしまい、当該温度が
460℃を超えると、上記膜の上記欠陥へ導入した水素
基が再び離脱してしまうだけでなく、新たに欠陥を生じ
てしまうからである。
Here, the temperature of the heat treatment is 150 to 46.
When the temperature is 0 ° C., good heat treatment can be performed. This is because if the temperature is lower than 150 ° C., it becomes difficult to introduce hydrogen groups into the defects of the film. If the temperature exceeds 460 ° C., the hydrogen groups introduced into the defects of the film become harder. This is because not only do they separate again, but they also cause new defects.

【0011】また、前記混合ガス中の前記水素ガスの割
合が0.1〜3mol%であると水素基の導入を良好に
行うことができる。なぜなら、当該割合が0.1mol
%未満であると、上記膜の上記欠陥への水素基の導入が
困難となってしまい、当該割合が3mol%を超える
と、二酸化錫が還元されて金属錫となってしまう虞を生
じるばかりか、引火や爆発の虞も生じてしまうからであ
る。
[0011] When the ratio of the hydrogen gas in the mixed gas is 0.1 to 3 mol%, the introduction of hydrogen groups can be carried out well. Because the ratio is 0.1 mol
%, It becomes difficult to introduce hydrogen groups into the defects of the film, and if the ratio exceeds 3 mol%, not only is there a possibility that tin dioxide is reduced to metal tin. This is because there is a risk of ignition or explosion.

【0012】[0012]

【発明の実施の形態】本発明による二酸化錫膜の改質方
法の実施の形態を図1を用いて説明する。なお、図1
は、その方法の実施に使用する装置の概略構成図であ
る。
DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a method for modifying a tin dioxide film according to the present invention will be described with reference to FIG. FIG.
1 is a schematic configuration diagram of an apparatus used for carrying out the method.

【0013】図1に示すように、石英からなる反応容器
1の外部には、ヒータ2が設けられている。反応容器1
の内部には、石英からなる支持テーブル3が設けられて
いる。支持テーブル3には、熱電対4が設けられてい
る。この熱電対4は、反応容器1の外部に配設された図
示しない制御装置の入力部に電気的に接続され、当該制
御装置の出力部には、上記ヒータ2が電気的に接続され
ており、当該制御装置は、上記熱電対4からの信号に基
づいて、反応容器1内を所定の温度範囲内に保つように
上記ヒータ2を制御することができるようになってい
る。
As shown in FIG. 1, a heater 2 is provided outside a reaction vessel 1 made of quartz. Reaction vessel 1
Is provided with a support table 3 made of quartz. A thermocouple 4 is provided on the support table 3. The thermocouple 4 is electrically connected to an input portion of a control device (not shown) provided outside the reaction vessel 1, and the heater 2 is electrically connected to an output portion of the control device. The control device can control the heater 2 based on a signal from the thermocouple 4 so as to keep the inside of the reaction vessel 1 within a predetermined temperature range.

【0014】前記反応容器1には、窒素ガスやアルゴン
ガスなどのような不活性ガスと水素ガスとを所定の割合
で混合した混合ガス(混合ガス中の水素ガスの割合:
0.1〜3mol%)11を充填したボンベ5が配管6
を介して連結されている。配管6には、減圧弁7および
流量計8が設けられている。なお、図中、10は熱CV
D法により二酸化錫膜を成膜したガラス製の基板であ
る。
In the reaction vessel 1, a mixed gas in which an inert gas such as nitrogen gas or argon gas and hydrogen gas are mixed at a predetermined ratio (the ratio of hydrogen gas in the mixed gas:
0.1 to 3 mol%) cylinder 5 filled with 11
Are connected via The pipe 6 is provided with a pressure reducing valve 7 and a flow meter 8. In the figure, 10 is the heat CV
This is a glass substrate on which a tin dioxide film is formed by the method D.

【0015】このような装置を用いた二酸化錫膜の改質
方法を次に説明する。基板10を支持テーブル3上に配
置し、減圧弁7や流量計8等を調整して反応容器1内を
上記混合ガス11の雰囲気に置換した後、ヒータ2が反
応容器1内を所定の温度範囲内(150〜460℃)に
加熱するように前記制御装置を作動させると、基板10
上に成膜された二酸化錫膜の結晶粒界面に存在する欠陥
(未結合手)に水素基が導入され、当該欠陥箇所が不活
性化するので、当該二酸化錫膜は、上記欠陥による電子
(キャリア)の捕捉が大幅に減少し、導電率の低下が大
幅に抑えられるようになる。
A method for modifying a tin dioxide film using such an apparatus will now be described. After disposing the substrate 10 on the support table 3 and adjusting the pressure reducing valve 7 and the flow meter 8 to replace the inside of the reaction vessel 1 with the atmosphere of the mixed gas 11, the heater 2 sets the inside of the reaction vessel 1 to a predetermined temperature. When the control device is operated so as to heat within the range (150 to 460 ° C.),
A hydrogen group is introduced into a defect (dangling bond) existing at a crystal grain interface of a tin dioxide film formed thereon, and the defect site is inactivated. Carrier) is greatly reduced, and the decrease in conductivity is significantly suppressed.

【0016】この二酸化錫膜の欠陥の不活性化にあたっ
て、水素ガスを用いるようにしたことから、水蒸気やエ
タノール蒸気などを用いた場合に必要な結露防止や蒸気
分圧の制御などを行わずに済むようになったので、特殊
な装置を用いることなく二酸化錫膜を簡単に改質するこ
とができる。
Since hydrogen gas is used to inactivate the defects of the tin dioxide film, it is possible to prevent dew condensation and control of the partial pressure of vapor which are required when using water vapor or ethanol vapor. As a result, the tin dioxide film can be easily modified without using a special device.

【0017】したがって、このような二酸化錫膜の改質
方法によれば、簡単な装置構成で二酸化錫膜を改質する
ことができるので、実用化を容易に図ることができる。
Therefore, according to such a method for modifying a tin dioxide film, it is possible to modify the tin dioxide film with a simple apparatus configuration, so that practical application can be easily achieved.

【0018】なお、二酸化錫膜の導電率の低下抑制量
は、熱CVD法による成膜条件で違いを生じるが、一般
的には、混合ガスが3mol%H2 +97mol%
2 、混合ガスの供給圧力が1kg/cm2 、混合ガス
の供給流量が0.5〜10リットル/分、熱処理温度が
200〜400℃、熱処理時間が10〜60分であれ
ば、抵抗率を約半分にすることができる。
Although the amount of suppression of the decrease in the conductivity of the tin dioxide film varies depending on the film forming conditions by the thermal CVD method, the mixed gas is generally 3 mol% H 2 +97 mol%.
If the supply pressure of N 2 and the mixed gas is 1 kg / cm 2 , the supply flow rate of the mixed gas is 0.5 to 10 L / min, the heat treatment temperature is 200 to 400 ° C., and the heat treatment time is 10 to 60 minutes, the resistivity is Can be halved.

【0019】また、本実施の形態では、水素ガスと不活
性ガスとの混合ガス11をボンベ5から反応容器1内に
供給するようにしたが、窒素ガスやアルゴンガスなどの
不活性ガスを充填した不活性ガスボンベからの不活性ガ
スと水素ガスボンベからの水素ガスとを前述した比率で
混合させるように流量をそれぞれ調整しながら反応容器
に供給するようにしても、本実施の形態と同様な効果を
得ることができる。
In this embodiment, the mixed gas 11 of the hydrogen gas and the inert gas is supplied from the cylinder 5 into the reaction vessel 1. However, the mixed gas 11 is filled with an inert gas such as a nitrogen gas or an argon gas. Even if the inert gas from the inert gas cylinder and the hydrogen gas from the hydrogen gas cylinder are supplied to the reaction vessel while adjusting the flow rates so as to be mixed at the above-described ratio, the same effect as in the present embodiment is obtained. Can be obtained.

【0020】[0020]

【発明の効果】本発明の二酸化錫膜の改質方法によれ
ば、二酸化錫膜の導電性を簡単に向上させることができ
るので、実用化を容易に図ることができる。
According to the method for modifying a tin dioxide film of the present invention, the conductivity of the tin dioxide film can be easily improved, so that practical application can be easily achieved.

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

【図1】本発明による二酸化錫膜の改質方法の実施に使
用する装置の一例の概略構成図である。
FIG. 1 is a schematic configuration diagram of an example of an apparatus used for implementing a method for modifying a tin dioxide film according to the present invention.

【符号の説明】[Explanation of symbols]

1 反応容器 2 ヒータ 3 支持テーブル 4 熱電対 5 ボンベ 6 配管 7 減圧弁 8 流量計 10 基板 11 混合ガス REFERENCE SIGNS LIST 1 reaction vessel 2 heater 3 support table 4 thermocouple 5 cylinder 6 pipe 7 pressure reducing valve 8 flow meter 10 substrate 11 mixed gas

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 二酸化錫膜を水素ガスと不活性ガスとの
混合ガスの雰囲気中で熱処理することを特徴とする二酸
化錫膜の改質方法。
1. A method for modifying a tin dioxide film, comprising: performing a heat treatment on the tin dioxide film in an atmosphere of a mixed gas of hydrogen gas and an inert gas.
【請求項2】 前記熱処理の温度が150〜460℃で
あることを特徴とする請求項1に記載の二酸化錫膜の改
質方法。
2. The method for modifying a tin dioxide film according to claim 1, wherein the temperature of the heat treatment is 150 to 460 ° C.
【請求項3】 前記混合ガス中の前記水素ガスの割合が
0.1〜3mol%であることを特徴とする請求項1ま
たは2に記載の二酸化錫膜の改質方法。
3. The method for modifying a tin dioxide film according to claim 1, wherein a ratio of the hydrogen gas in the mixed gas is 0.1 to 3 mol%.
JP28778696A 1996-10-30 1996-10-30 Modification of tin dioxide film Pending JPH10139428A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP28778696A JPH10139428A (en) 1996-10-30 1996-10-30 Modification of tin dioxide film

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP28778696A JPH10139428A (en) 1996-10-30 1996-10-30 Modification of tin dioxide film

Publications (1)

Publication Number Publication Date
JPH10139428A true JPH10139428A (en) 1998-05-26

Family

ID=17721731

Family Applications (1)

Application Number Title Priority Date Filing Date
JP28778696A Pending JPH10139428A (en) 1996-10-30 1996-10-30 Modification of tin dioxide film

Country Status (1)

Country Link
JP (1) JPH10139428A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102315325A (en) * 2010-07-01 2012-01-11 初星太阳能公司 The formation method of the conductive area of reducing in the transparent conductive film of photovoltaic module

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102315325A (en) * 2010-07-01 2012-01-11 初星太阳能公司 The formation method of the conductive area of reducing in the transparent conductive film of photovoltaic module
AU2011203258B2 (en) * 2010-07-01 2016-03-24 Primestar Solar, Inc. Thin film article and method for forming a reduced conductive area in transparent conductive films for photovoltaic modules

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