JPH059724A - Formation of transparent conductive thin film - Google Patents

Formation of transparent conductive thin film

Info

Publication number
JPH059724A
JPH059724A JP19589191A JP19589191A JPH059724A JP H059724 A JPH059724 A JP H059724A JP 19589191 A JP19589191 A JP 19589191A JP 19589191 A JP19589191 A JP 19589191A JP H059724 A JPH059724 A JP H059724A
Authority
JP
Japan
Prior art keywords
target
thin film
substrate
ito
transparent conductive
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
JP19589191A
Other languages
Japanese (ja)
Inventor
Takashi Ito
孝 伊東
Masafumi Yamazaki
雅史 山崎
Kiyoshi Tokunaga
清 徳永
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.)
SHINKURON KK
Original Assignee
SHINKURON KK
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 SHINKURON KK filed Critical SHINKURON KK
Priority to JP19589191A priority Critical patent/JPH059724A/en
Publication of JPH059724A publication Critical patent/JPH059724A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To improve the electrical conductivity of an ITO thin film by supplying a DC electric power and high-frequency electric power in superposition to a target and changing the position of the magnetic field of the target at the time of forming the transparent conductive film represented by the ITO on a substrate by a magnetron sputtering method. CONSTITUTION:The inside of the vacuum chamber 11 of a magnetron sputtering device which is disposed with a holder 25 mounted with a substrate 27 and a sputtering electrode 21 mounted with the target 29 made of the ITO consisting of indium oxide and tin oxide in the position opposite thereto and is mounted with a magnet device 31 on the rear surface thereof is evacuated and thereafter, Ar or a gaseous mixture 15 composed of the Ar and O2 is supplied into this vacuum chamber. The DC voltage and the high-frequency voltage of 10 to 100MHz are impressed between the substrate holder 25 and the sputtering electrode 21 and the target 29 is sputtered by the Ar ions generated by the magnetron discharge, by which the ITO thin film is formed on the substrate 27. The target 29 is uniformly sputtered by moving the magnet 31 on the rear surface of the target in such a case. The ITO thin film on the substrate 27 is thus made into the high-quality thin film having the small electric resistance.

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、マグネトロンスパッタ
法により、ITOに代表される酸化インジウム系透明導
電膜を形成する方法に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for forming an indium oxide type transparent conductive film typified by ITO by a magnetron sputtering method.

【0002】[0002]

【従来の技術】ITO(Indium−Tin−Oxi
de)からなる透明導電性薄膜は、液晶表示素子やタッ
チセンサー等の透明電極などに広く用いられており、マ
グネトロンスパッタ法などにより形成することができ
る。
2. Description of the Related Art ITO (Indium-Tin-Oxi)
The transparent conductive thin film composed of de) is widely used for transparent electrodes of liquid crystal display elements and touch sensors, and can be formed by a magnetron sputtering method or the like.

【0003】このようなITO薄膜においては、その低
抵抗化が実現できれば、低電圧駆動が可能となり、ま
た、同じ電圧で駆動するのであれば、それだけ薄膜を薄
くすることができ、透明化あるいは成膜コストの低減が
可能となる。
In such an ITO thin film, if a low resistance can be realized, it can be driven at a low voltage, and if it is driven at the same voltage, the thin film can be made thin so as to be transparent or formed. It is possible to reduce the membrane cost.

【0004】しかしながら、従来のスパッタ法によるI
TO透明導電膜の形成においては、その成膜条件、成膜
後のアニーリング処理の有無ないしは条件、膜厚等にも
よるが、導電性が未だ必ずしも十分でなく、よりいっそ
うの改善がまたれていた。
However, the conventional sputtering method I
In the formation of the TO transparent conductive film, the conductivity is not always sufficient, depending on the film forming conditions, the presence or absence of annealing treatment after the film formation, the conditions, the film thickness, etc., and further improvement has been made. It was

【0005】[0005]

【発明が解決しようとする課題】本発明は酸化インジウ
ム系透明導電膜の低抵抗化を目的とする。
An object of the present invention is to reduce the resistance of an indium oxide type transparent conductive film.

【0006】[0006]

【課題を解決するための手段】本発明の透明導電膜の形
成方法は、マグネトロンスパッタ法によりインジウム系
酸化物をスパッタするに際し、ターゲットに直流電力と
高周波電力とを重畳せしめて供給するとともに、ターゲ
ット上に形成される磁界の位置を変化させて、インジウ
ム系酸化物からなるターゲットをスパッタすることを特
徴とする。
According to the method for forming a transparent conductive film of the present invention, when sputtering an indium oxide by a magnetron sputtering method, DC power and high frequency power are superposed and supplied to the target, and the target is also supplied. It is characterized in that the position of the magnetic field formed above is changed and a target made of an indium oxide is sputtered.

【0007】[0007]

【実施例】図1は本発明の実施例を示す説明図であり、
図2は本実施例におけるターゲット29と磁石装置31
との関係を示す説明斜視図である。
FIG. 1 is an explanatory view showing an embodiment of the present invention,
FIG. 2 shows a target 29 and a magnet device 31 in this embodiment.
It is an explanatory perspective view showing the relationship with.

【0008】真空槽11には、絶縁体23を介してスパ
ッタ電極21(陰極)が取り付けられており、この上に
ターゲット29が載置されている。また、ターゲット2
9と対向して、基板ホルダ25に成膜される基板27が
取り付けられている。一方、ターゲット29の裏面に
は、ターゲット29の面積よりも小さな磁石装置31が
設けられている。
A sputtering electrode 21 (cathode) is attached to the vacuum chamber 11 via an insulator 23, and a target 29 is placed on the sputtering electrode 21. Also, target 2
A substrate 27 on which a film is to be formed is attached to the substrate holder 25 so as to face the substrate 9. On the other hand, on the back surface of the target 29, a magnet device 31 smaller than the area of the target 29 is provided.

【0009】磁石装置31は、S極をターゲット29に
向けるS磁石35と、N極をターゲット29に向けS磁
石35を離間して囲繞するN磁石33と、ヨーク37と
から構成されている。N極からの磁力線39は、ターゲ
ット29面を通過したのち再びターゲット29面を経て
S極に入り、磁力線39とターゲット29とにより閉ル
ープが形成されている。磁石装置31は、図示していな
い駆動部材により矢印T方向に移動させることができ
る。
The magnet device 31 comprises an S magnet 35 for directing the S pole toward the target 29, an N magnet 33 for surrounding the S magnet 35 with the N pole facing the target 29 with a space therebetween, and a yoke 37. The magnetic force line 39 from the N pole passes through the surface of the target 29 and then passes through the surface of the target 29 again to enter the S pole, and the magnetic force line 39 and the target 29 form a closed loop. The magnet device 31 can be moved in the arrow T direction by a driving member (not shown).

【0010】スパッタ電極21には、RF対策を施した
直流電源41と、マッチングボックス45を介して高周
波電源43が接続されている。
A DC power supply 41 provided with an RF measure and a high frequency power supply 43 via a matching box 45 are connected to the sputter electrode 21.

【0011】スパッタに際しては、真空槽11内を真空
ポンプ13により高真空に排気したのち、ガスボンベ1
5からアルゴンガスあるいはアルゴンと酸素の混合ガス
を、バリアブルバルブ17を介して真空槽11内に導入
してスパッタ雰囲気を設定する。また、必要に応じて基
板27をヒータ(図示せず)等により加熱する。
At the time of sputtering, the inside of the vacuum chamber 11 is evacuated to a high vacuum by the vacuum pump 13, and then the gas cylinder 1
An argon gas or a mixed gas of argon and oxygen from 5 is introduced into the vacuum chamber 11 through the variable valve 17 to set the sputtering atmosphere. Further, the substrate 27 is heated by a heater (not shown) or the like as needed.

【0012】スパッタ雰囲気を設定したのち、直流電源
41により直流電力を供給するとともに、マッチングボ
ックス45により整合をとりながら、高周波電源43に
より高周波電力を供給する。高周波電源43としては、
10〜100MHz程度の周波数のものを用いることが
できる。高周波電力の重畳の程度は、直流電力に対して
1/6〜3/2倍の高周波電力を供給することが好適で
あり、好ましくは1/3〜6/5倍である。放電が開始
されると、マグネトロン型放電により、電子が前述の閉
ループ内に閉じ込められて運動し、ITOからなるター
ゲット29を叩いてスパッタし、基板27上にITO薄
膜が形成される。このとき、磁石装置31による磁場と
電場が直交する部分が集中的にスパッタされ、その部分
のターゲット29が選択的に浸食される(エロージョン
現象)。本発明では、ターゲット29の裏面の磁石装置
31を矢印T方向に移動させながらスパッタすることに
より、磁場と電場とが直交するターゲット29上の部位
が刻々と変化し、上記のエロージョン現象を防止すると
ともに、形成されるITO薄膜の導電性を高めることが
できる。
After setting the sputtering atmosphere, DC power is supplied from the DC power supply 41, and high frequency power is supplied from the high frequency power supply 43 while matching is performed by the matching box 45. As the high frequency power source 43,
A frequency band of about 10 to 100 MHz can be used. The degree of superposition of the high frequency power is preferably 1/6 to 3/2 times the high frequency power with respect to the DC power, and preferably 1/3 to 6/5 times. When the discharge is started, electrons are trapped in the closed loop and move by the magnetron type discharge, hitting the target 29 made of ITO to sputter, and an ITO thin film is formed on the substrate 27. At this time, a portion where the magnetic field and the electric field of the magnet device 31 are orthogonal to each other is intensively sputtered, and the target 29 in that portion is selectively eroded (erosion phenomenon). In the present invention, by sputtering while moving the magnet device 31 on the back surface of the target 29 in the direction of the arrow T, the portion on the target 29 where the magnetic field and the electric field are orthogonal to each other changes every moment, and the above erosion phenomenon is prevented. At the same time, the conductivity of the formed ITO thin film can be increased.

【0013】[0013]

【発明の効果】本発明によれば、ITO等の酸化インジ
ウム系導電性薄膜を製造するに際して、スパッタ電極に
直流電力と高周波電力とを重畳して供給するとともに、
磁場と電場の直交するターゲット上の部位を変化させる
ことにより、低抵抗の導電性薄膜を得ることができる。
According to the present invention, when an indium oxide type conductive thin film such as ITO is manufactured, DC power and high frequency power are superposed and supplied to a sputter electrode, and
A low resistance conductive thin film can be obtained by changing the site on the target where the magnetic field and the electric field intersect at right angles.

【0014】実験例 図1に示した装置を用い、ターゲット29としてITO
を、また、基板27としてガラス板をセットした。
Experimental Example Using the apparatus shown in FIG. 1, ITO was used as the target 29.
And a glass plate was set as the substrate 27.

【0015】ついで、真空槽11内を真空ポンプ13に
より1×10-5Torrまで排気した後、ガスボンベ1
5からバリアブルバルブ17を介してアルゴンガスを真
空槽11内に導入してスパッタ圧力を調整し、基板27
を200℃に加熱しながらスパッタし、基板27上にI
TO薄膜(厚さ2000オングストローム)を形成し
た。
Then, the inside of the vacuum chamber 11 is evacuated by the vacuum pump 13 to 1 × 10 -5 Torr, and then the gas cylinder 1
5 through the variable valve 17 into the vacuum chamber 11 by introducing an argon gas to adjust the sputtering pressure.
Is heated to 200 ° C. and sputtered,
A TO thin film (thickness 2000 angstrom) was formed.

【0016】このとき、磁石装置31を矢印T方向に連
続して往復移動させた。また、直流電源41によりスパ
ッタ電極21に680Wを印加し、一方、高周波電源4
3(13.56MHz)からはロット毎に0〜750W
の範囲で電力を変化させて実験を繰り返した。
At this time, the magnet device 31 was continuously reciprocated in the direction of arrow T. Further, 680 W is applied to the sputter electrode 21 from the DC power supply 41, while the high frequency power
3 (13.56MHz) from 0 to 750W per lot
The experiment was repeated by changing the power within the range.

【0017】得られたITO薄膜の比抵抗と、重畳した
高周波電力との関係を図3に示した。図3で、横軸は普
通目盛、縦軸は対数目盛である。なお、ターゲットとし
ては5インチ×20インチ(厚さ1/4インチ)の角型
ターゲットを用いた。200℃という低温にもかかわら
ず、高周波電力を供給することにより、比抵抗が2.2
5×10-4Ω・cmから1.59×10-4Ω・cmと、
約30%低下していることが判る。
The relationship between the specific resistance of the obtained ITO thin film and the superimposed high frequency power is shown in FIG. In FIG. 3, the horizontal axis is a normal scale and the vertical axis is a logarithmic scale. As the target, a 5 inch × 20 inch (1/4 inch thick) rectangular target was used. Despite the low temperature of 200 ℃, by supplying high frequency power, the specific resistance is 2.2.
From 5 × 10 −4 Ω · cm to 1.59 × 10 −4 Ω · cm,
It can be seen that it has decreased by about 30%.

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

【図1】本発明の実施例を示す説明図である。FIG. 1 is an explanatory diagram showing an embodiment of the present invention.

【図2】ターゲットと磁石装置との関係を示す説明斜視
図である。
FIG. 2 is an explanatory perspective view showing a relationship between a target and a magnet device.

【図3】ITO薄膜の比抵抗と高周波電力との関係を示
すグラフである。
FIG. 3 is a graph showing the relationship between the specific resistance of the ITO thin film and the high frequency power.

【符号の説明】[Explanation of symbols]

11 真空槽 13 真空ポンプ 15 ガスボンベ 17 バリアブルバルブ 21 スパッタ電極 23 絶縁体 25 基板ホルダ 27 基板 29 ターゲット 31 磁石装置 33 N磁石 35 S磁石 37 ヨーク 39 磁力線 41 直流電源 43 高周波電源 45 マッチングボックス 11 Vacuum Tank 13 Vacuum Pump 15 Gas Cylinder 17 Variable Valve 21 Sputtering Electrode 23 Insulator 25 Substrate Holder 27 Substrate 29 Target 31 Magnet Device 33 N Magnet 35 S Magnet 37 Yoke 39 Magnetic Field Line 41 DC Power Supply 43 High Frequency Power Supply 45 Matching Box

Claims (1)

【特許請求の範囲】 【請求項1】 マグネトロンスパッタ法によりインジウ
ム系酸化物をスパッタするに際し、ターゲットに直流電
力と高周波電力とを重畳せしめて供給するとともに、タ
ーゲット上に形成される磁界の位置を変化させて、イン
ジウム系酸化物からなるターゲットをスパッタすること
を特徴とする透明導電膜の形成方法。
Claim: What is claimed is: 1. When indium oxide is sputtered by magnetron sputtering, direct current power and high frequency power are superposed and supplied to the target, and the position of the magnetic field formed on the target is controlled. A method for forming a transparent conductive film, which comprises changing a target and sputtering an indium-based oxide target.
JP19589191A 1991-07-09 1991-07-09 Formation of transparent conductive thin film Pending JPH059724A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19589191A JPH059724A (en) 1991-07-09 1991-07-09 Formation of transparent conductive thin film

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19589191A JPH059724A (en) 1991-07-09 1991-07-09 Formation of transparent conductive thin film

Publications (1)

Publication Number Publication Date
JPH059724A true JPH059724A (en) 1993-01-19

Family

ID=16348710

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19589191A Pending JPH059724A (en) 1991-07-09 1991-07-09 Formation of transparent conductive thin film

Country Status (1)

Country Link
JP (1) JPH059724A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003532997A (en) * 2000-05-12 2003-11-05 ウンアクシス ドイチェランド ゲーエムベーハー Indium-tin oxide (ITO) film and method for producing the same
CN103060765A (en) * 2013-01-18 2013-04-24 中国科学院宁波材料技术与工程研究所 Preparation method of MoS2 composite thin film with high hardness and loss abrasion on surface of substrate
CN103993280A (en) * 2014-05-30 2014-08-20 天津大学 Preparation method of Nb2O5/Cu/Nb2O5 transparent electrode
JP2014157814A (en) * 2013-01-16 2014-08-28 Nitto Denko Corp Transparent conductive film and manufacturing method thereof
JP2014157816A (en) * 2013-01-16 2014-08-28 Nitto Denko Corp Manufacturing method of transparent conductive film
JP2014157815A (en) * 2013-01-16 2014-08-28 Nitto Denko Corp Transparent conductive film and manufacturing method thereof
CN110349750A (en) * 2019-07-10 2019-10-18 四川大学 A kind of method of thin dielectric film device operating voltages under raising strong electrical field

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003532997A (en) * 2000-05-12 2003-11-05 ウンアクシス ドイチェランド ゲーエムベーハー Indium-tin oxide (ITO) film and method for producing the same
JP2014157814A (en) * 2013-01-16 2014-08-28 Nitto Denko Corp Transparent conductive film and manufacturing method thereof
JP2014157816A (en) * 2013-01-16 2014-08-28 Nitto Denko Corp Manufacturing method of transparent conductive film
JP2014157815A (en) * 2013-01-16 2014-08-28 Nitto Denko Corp Transparent conductive film and manufacturing method thereof
US9805837B2 (en) 2013-01-16 2017-10-31 Nitto Denko Corporation Transparent conductive film and production method therefor
CN103060765A (en) * 2013-01-18 2013-04-24 中国科学院宁波材料技术与工程研究所 Preparation method of MoS2 composite thin film with high hardness and loss abrasion on surface of substrate
CN103060765B (en) * 2013-01-18 2015-04-22 中国科学院宁波材料技术与工程研究所 Preparation method of MoS2 composite thin film with high hardness and loss abrasion on surface of substrate
CN103993280A (en) * 2014-05-30 2014-08-20 天津大学 Preparation method of Nb2O5/Cu/Nb2O5 transparent electrode
CN110349750A (en) * 2019-07-10 2019-10-18 四川大学 A kind of method of thin dielectric film device operating voltages under raising strong electrical field
CN110349750B (en) * 2019-07-10 2021-03-19 四川大学 Method for improving working voltage of dielectric thin film device under strong electric field

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