WO2014010383A1 - 焼結体及びアモルファス膜 - Google Patents
焼結体及びアモルファス膜 Download PDFInfo
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Definitions
- the present invention relates to a sintered body capable of obtaining a transparent conductive film having good visible light transmittance and conductivity, and an amorphous film having a low refractive index and produced using the sintered body.
- a transparent conductive film a film in which tin is added to indium oxide, that is, an ITO (Indium-Tin-oxide) film is transparent and excellent in electrical conductivity, and is used in a wide range of applications such as various displays.
- ITO Indium-Tin-oxide
- this ITO has a problem that the manufacturing cost is inferior because indium which is a main component is expensive.
- the material when using visible light in a display or the like, the material needs to be transparent, and it is particularly preferable that the material has a high transmittance in the entire visible light region.
- the refractive index is high, the optical loss increases and the viewing angle dependency of the display deteriorates. Therefore, the refractive index is low, and the film is an amorphous film to improve the film cracking and etching performance. It is also desirable.
- the amorphous film Since the amorphous film has low stress, cracks are unlikely to occur compared to the crystalline film, and it is considered that the amorphous film will be required for display applications toward flexible use.
- the above ITO needs to be crystallized in order to improve the resistance value and transmittance, and if it is amorphous, it absorbs in the short wavelength region and does not become a transparent film. Not suitable for.
- IZO indium oxide-zinc oxide
- GZO gallium oxide-zinc oxide
- AZO aluminum oxide-zinc oxide
- IZO can be a low-resistance amorphous film, it has a problem that it has absorption in a short wavelength region and has a high refractive index.
- GZO and AZO are likely to become crystallized films due to the ease of ZnO c-axis orientation, and such crystallized films have problems such as film peeling and film cracking because stress increases.
- Patent Document 4 discloses a light-transmitting conductive material that realizes a wide range of refractive index, mainly composed of ZnO and an alkaline earth metal fluoride compound. However, this is a crystallized film, and the effect of the amorphous film as in the present invention described later cannot be obtained.
- Patent Document 5 discloses a transparent conductive film that has a low refractive index and a low specific resistance and is amorphous. However, the composition system differs from the present invention, and the refractive index and the resistance value are disclosed. Cannot be adjusted together.
- An object of the present invention is to provide a transparent conductive film capable of maintaining good visible light transmittance and conductivity, in particular, a sintered body capable of obtaining an amorphous film having a low refractive index. Since this thin film has high transmittance and excellent mechanical properties, it is useful as a transparent conductive film for displays and a protective film for optical displays. Accordingly, it is an object to improve the characteristics of the optical device, reduce the equipment cost, and greatly improve the film forming characteristics.
- the present inventors have conducted intensive research. As a result, by replacing the conventional transparent conductive film such as ITO with the material system shown below, the resistivity and the refractive index can be arbitrarily set. It is possible to adjust to the above, ensuring optical characteristics equal to or higher than conventional, stable film formation using a sputtering method or on-plating method, and further by using an amorphous film, We obtained the knowledge that it is possible to improve the characteristics and productivity of optical devices with thin films.
- a sintered body containing zinc (Zn), tin (Sn) and / or indium (In), magnesium (Mg), oxygen (O), and the total content of Sn and / or In is SnO 2 And / or 10 to 90 mol% in terms of In 2 O 3 , and when the ratio of the number of Sn and / or In to the number of Zn atoms is 1 or less, the Mg content is 15 to 50 mol% in terms of MgF 2 , An oxide sintered body characterized in that when the ratio of the number of Sn and / or In to the number of Zn atoms is 1 or more, the Mg content is 1 to 40 mol% in terms of MgF 2 ; 2) Further containing gallium (Ga), aluminum (Al) and / or boron (B), the total content of Ga and / or B is 0.1 to 5 in terms of Ga 2 O 3 and
- the present invention also provides: 5) A thin film containing zinc (Zn), tin (Sn) and / or indium (In), magnesium (Mg), oxygen (O), wherein the total content of Sn and / or In is SnO 2 and / or Or, when the ratio of the number of Sn and / or In to the number of Zn atoms is 1 or less in terms of In 2 O 3 , Mg content is 15 to 50 mol% in terms of MgF 2 A thin film characterized in that when the ratio of the number of Sn and / or In to the number of atoms is 1 or more, the Mg content is 1 to 40 mol% in terms of MgF 2 and is amorphous; 6) Further, gallium (Ga), aluminum (Al) and / or boron (B) is contained, and the total content of Ga and / or B is 0.1 to 5 in terms of Ga 2 O 3 and / or B 2 O 3
- an amorphous film can be formed by sputtering or ion plating, and there is an effect that film cracking due to stress is small and occurrence of film peeling can be suppressed. Further, it is possible to provide a sintered material useful for a thin film having an excellent characteristic of low refractive index, particularly an optical thin film for forming a protective layer of an optical information recording medium, a thin film for an organic EL television, and a thin film for a transparent electrode.
- the oxide sintered body of the present invention is a sintered body containing zinc (Zn), tin (Sn) and / or indium (In), magnesium (Mg), oxygen (O), and Sn and / or
- the Mg content is MgF 15 ⁇ 50 mol% in 2 terms
- the content of Mg is a 1 ⁇ 40 mol% in MgF 2 terms
- the balance is adjusted so that the total is 100 mol% with the balance being ZnO. Therefore, the Zn content can be determined from the remaining ZnO equivalent.
- the amorphous film of a low refractive index can be formed and the said effect of this invention is acquired.
- content of each metal in a sintered compact is prescribed
- each metal in a sintered compact exists in part or all as complex oxide.
- each content is measured not as an oxide but as a metal.
- the present invention is characterized in that magnesium fluoride (MgF 2 ) is added to form an amorphous film having a low refractive index.
- Mg content is 15 to 50 mol% in terms of MgF 2 when the ratio of Sn and / or In atoms to Zn atoms is 1 or less, and the ratio of Sn and / or In atoms to Zn atoms is When the ratio is 1 or more, an amorphous and low refractive index film can be formed by adjusting the MgF 2 content to 1 to 40 mol%. Thereby, the generation
- an oxide of gallium (Ga) and / or boron (B) can be added in order to impart conductivity to the film. Since conductivity is reduced by the addition of magnesium fluoride, it is preferable to add an oxide of Ga or B depending on the amount of magnesium fluoride added. When the amount of magnesium fluoride added is small, desired conductivity can be obtained without adding Ga or B oxides. In the present invention, desired conductivity can be obtained by setting the total content of at least Ga and / or B to 0.1 to 10 mol% in terms of Ga 2 O 3 and / or B 2 O 3 .
- a film formed by sputtering a target obtained by machining the sintered body of the present invention or a film formed by the ion plating may have a refractive index of 2.0 or less at a wavelength of 550 nm.
- Magnesium fluoride (MgF 2 ), gallium oxide (Ga 2 O 3 ), and boron oxide (B 2 O 3 ) are materials having a lower refractive index than zinc oxide, tin oxide, or indium oxide.
- a film having a low refractive index can be obtained by adding a fluoride or oxide.
- zinc (Zn), tin (Sn) and / or indium (In), magnesium (Mg), oxygen (O) is contained, and the total content of Sn and / or In is SnO 2 and / Or 10 to 90 mol% in terms of In 2 O 3 , and the Mg content is 15 to 50 mol in terms of MgF 2 when the ratio of the number of Sn and / or In atoms to the number of Zn atoms is 1 or less.
- % When the ratio of Sn and / or In atoms to Zn atoms is 1 or more, it is 1 to 40 mol% in terms of MgF 2 , and an amorphous thin film can be produced.
- the thin film of the present invention When the thin film of the present invention is used for organic EL televisions, transparent electrodes, and the like, it is desirable to have a refractive index and a conductivity suitable for these applications.
- the refractive index is more preferably 2.0 or less at a wavelength of 550 nm
- the conductivity is more preferably 1 m ⁇ ⁇ cm or more and 1,000,000 (1M) ⁇ ⁇ cm or less.
- Example 1 3N corresponds with 5 [mu] m or less of ZnO powder were prepared an average particle size 5 [mu] m or less of SnO 2 powder, 3N average particle size 5 [mu] m or less of MgF 2 powder with equivalent, 5 [mu] m following Ga 2 O 3 powder with 3N corresponds with 3N equivalent.
- the powder material was hot-press sintered at a temperature of 850 ° C.
- the refractive index of the film reached 1.87 (wavelength 550 nm).
- Example 2 3N corresponds with 5 [mu] m or less of ZnO powder were prepared an average particle size 5 [mu] m or less of SnO 2 powder, 3N average particle size 5 [mu] m or less of MgF 2 powder with equivalent, 5 [mu] m following Ga 2 O 3 powder with 3N corresponds with 3N equivalent.
- the powder material was hot-press sintered at a temperature of 850 ° C.
- the refractive index of the film reached 1.87 (wavelength 550 nm).
- Example 3 ZnO powder with 3N equivalent and 5 ⁇ m or less, 3N equivalent and In 2 O 3 powder with average particle size of 5 ⁇ m or less, 3F and MgF 2 powder with average particle size of 5 ⁇ m or less, 3N equivalent with 5 ⁇ m or less Ga 2 O 3 powder did.
- the refractive index of the film reached 1.85 (wavelength 550 nm).
- Example 4 ZnO powder of 3N equivalent to 5 ⁇ m or less, 3N equivalent of In 2 O 3 powder with an average particle size of 5 ⁇ m or less, 3N equivalent of MgF 2 powder with an average particle size of 5 ⁇ m or less, 3N equivalent of B 2 O 3 powder of 5 ⁇ m or less did.
- the refractive index of the film reached 1.90 (wavelength 550 nm).
- Example 5 ZnO powder of 3N equivalent to 5 ⁇ m or less, 3N equivalent of In 2 O 3 powder with an average particle size of 5 ⁇ m or less, 3N equivalent of MgF 2 powder with an average particle size of 5 ⁇ m or less, 3N equivalent of B 2 O 3 powder of 5 ⁇ m or less did.
- the refractive index of the film reached 1.70 (wavelength 550 nm).
- Example 6 3N corresponds with 5 [mu] m or less of ZnO powder were prepared an average particle size 5 [mu] m or less of SnO 2 powder, 3N average particle size 5 [mu] m or less of MgF 2 powder with equivalent, 5 [mu] m following Ga 2 O 3 powder with 3N corresponds with 3N equivalent.
- the powder material was hot-press sintered at a temperature of 850 ° C.
- the refractive index of the film reached 1.80 (wavelength 550 nm).
- Example 7 3N corresponds with 5 [mu] m or less of ZnO powder were prepared an average particle size 5 [mu] m or less of SnO 2 powder, 3N average particle size 5 [mu] m or less of MgF 2 powder with equivalent, 5 [mu] m following Ga 2 O 3 powder with 3N corresponds with 3N equivalent.
- the powder material was hot-press sintered at a temperature of 850 ° C.
- the refractive index of the film reached 1.98 (wavelength 550 nm).
- Example 8 ZnO powder with 3N equivalent and 5 ⁇ m or less, SnO 2 powder with 3N equivalent and average particle size of 5 ⁇ m or less, MgF 2 powder with 3N equivalent and average particle size of 5 ⁇ m or less, AlN 2 O 3 powder with 3N equivalent and 5 ⁇ m or less, 3N equivalent A B 2 O 3 powder having an average particle size of 5 ⁇ m or less was prepared.
- the ZnO powder and SnO 2 and MgF 2 powder and Al 2 O 3 powder and B 2 O 3 powder, ZnO: SnO 2: MgF 2 : Al 2 O 3: B 2 O 3 68.2: 14.
- the powder material was hot-press sintered in vacuum at a temperature of 1100 ° C. and a pressure of 250 kgf / cm 2 . Thereafter, the sintered body was machined to finish a sputtering target shape. As a result of measuring the bulk resistance and relative density of the obtained target, the relative density reached 98.2%, the bulk resistance was 3.1 m ⁇ ⁇ cm, and stable DC sputtering was possible. Next, sputtering was performed using the above-finished target.
- the sputtering conditions were DC sputtering, sputtering power 500 W, Ar gas pressure 0.5 Pa containing 2 vol%, and a film thickness of 1500 to 7000 mm. It was confirmed that the produced thin film was an amorphous film.
- the refractive index of the film reached 1.94 (wavelength 550 nm).
- the powder material is hot-press sintered at a temperature of 1100 ° C. and a pressure of 250 kgf / cm 2 in a vacuum. did. Thereafter, the sintered body was machined to finish a sputtering target shape. As a result of measuring the bulk resistance and relative density of the obtained target, the relative density reached 99.1%, the bulk resistance became 3.2 m ⁇ ⁇ cm, and stable DC sputtering was possible. Next, sputtering was performed using the above-finished target.
- the sputtering conditions were DC sputtering, sputtering power 500 W, Ar gas pressure 0.5 Pa containing 2 vol%, and a film thickness of 1500 to 7000 mm. It was confirmed that the produced thin film was an amorphous film.
- the refractive index of the film reached 1.94 (wavelength 550 nm).
- 3N corresponds with 5 [mu] m or less of ZnO powder were prepared an average particle size 5 [mu] m or less of SnO 2 powder, 3N average particle size 5 [mu] m or less of MgF 2 powder with equivalent, 5 [mu] m following Ga 2 O 3 powder with 3N corresponds with 3N equivalent.
- the powder material was hot-press sintered at a temperature of 850 ° C.
- 3N corresponds with 5 [mu] m or less of ZnO powder were prepared an average particle size 5 [mu] m or less of SnO 2 powder, 3N average particle size 5 [mu] m or less of MgF 2 powder with equivalent, 5 [mu] m following Ga 2 O 3 powder with 3N corresponds with 3N equivalent.
- the powder material was hot-press sintered at a temperature of 850 ° C. and a pressure of 250 kgf / cm 2 to obtain a sintered body for ion plating. As a result of ion plating using this sintered body, the produced film was not an amorphous film.
- 3N corresponds with 5 [mu] m or less of ZnO powder were prepared an average particle size 5 [mu] m or less of SnO 2 powder, 3N average particle size 5 [mu] m or less of MgF 2 powder with equivalent, 5 [mu] m following Ga 2 O 3 powder with 3N corresponds with 3N equivalent.
- the powder material was hot-press sintered at a temperature of 850 ° C.
- 3N corresponds at 5 [mu] m following ZnO powders were prepared an average particle size 5 [mu] m or less of SnO 2 powder, 3N average particle size 5 [mu] m or less of MgF 2 powder with equivalent, 5 [mu] m following Ga 2 O 3 powder with 3N corresponds with 3N equivalent.
- the powder material was hot-press sintered at a temperature of 850 ° C.
- the sintered body of the present invention can be used as a sputtering target or an ion plating material, and a thin film formed using these sputtering target or ion plating material can protect a transparent conductive film and an optical disk in various displays.
- a film there is an effect that it has extremely excellent characteristics in terms of transmittance, refractive index, and conductivity. Further, the present invention has an excellent effect that the film can be remarkably improved in cracking and etching performance due to the amorphous film.
- the sputtering target using the sintered body of the present invention has a low bulk resistance value and a high relative density of 90% or more, and thus enables stable DC sputtering. And there is a remarkable effect that the controllability of sputtering, which is a feature of this DC sputtering, can be facilitated, the film forming speed can be increased, and the sputtering efficiency can be improved.
- RF sputtering is performed as necessary, but even in this case, the film formation rate is improved.
- particles (dust generation) and nodules generated during sputtering during film formation can be reduced, and quality variation can be reduced and mass productivity can be improved.
- the ion plating material using the sintered body of the present invention can form an amorphous film having a low refractive index, it is possible to suppress the occurrence of cracks and cracks due to film stress, and film peeling. It has the effect.
- Such an amorphous film is particularly useful for an optical thin film for forming a protective layer of an optical information recording medium, a thin film for an organic EL television, and a thin film for a transparent electrode.
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Abstract
Description
1)亜鉛(Zn)、錫(Sn)及び/又はインジウム(In)、マグネシウム(Mg)、酸素(O)を含有する焼結体であって、Sn及び/又はInの総含有量がSnO2及び/又はIn2O3換算で10~90mol%、Znの原子数に対するSn及び/又はInの原子数の比が1以下であるとき、Mgの含有量がMgF2換算で15~50mol%、Znの原子数に対するSn及び/又はInの原子数の比が1以上であるとき、Mgの含有量がMgF2換算で1~40mol%、であることを特徴とする酸化物焼結体、
2)さらにガリウム(Ga)、アルミニウム(Al)及び/又はホウ素(B)を含有し、Ga及び/又はBの総含有量がGa2O3及び/又はB2O3換算で0.1~10mol%であることを特徴とする上記1)記載の酸化物焼結体、
3)上記1)又は上記2)記載の酸化物焼結体を用いることを特徴とするスパッタリングターゲット、
4)上記1)又は上記2)記載の酸化物焼結体を用いることを特徴とするイオンプレーティング材、提供する。
5)亜鉛(Zn)、錫(Sn)及び/又はインジウム(In)、マグネシウム(Mg)、酸素(O)を含有する薄膜であって、Sn及び/又はInの総含有量がSnO2及び/又はIn2O3換算で10~90mol%、Znの原子数に対するSn及び/又はInの原子数の比が1以下であるとき、Mgの含有量がMgF2換算で15~50mol%、Znの原子数に対するSn及び/又はInの原子数の比が1以上であるとき、Mgの含有量がMgF2換算で1~40mol%、非晶質であることを特徴とする薄膜、
6)さらにガリウム(Ga)、アルミニウム(Al)及び/又はホウ素(B)を含有し、Ga及び/又はBの総含有量がGa2O3及び/又はB2O3換算で0.1~10mol%であることを特徴とする上記5)記載の薄膜、
7)波長550nmにおける屈折率が2.0以下であることを特徴とする上記5)又は6)記載の薄膜、
8)比抵抗が1mΩ・cm~1MΩ・cmであることを特徴とする上記5)~7)のいずれか一に記載の薄膜、を提供する。
なお、本発明では、焼結体中の各金属の含有量を酸化物換算で規定しているが、焼結体中の各金属はその一部又は全てが複合酸化物として存在している。また、通常用いられる焼結体の成分分析では、酸化物ではなく、金属として、それぞれの含有量が測定される。
本発明の薄膜は、有機ELテレビ、透明電極等を用途とする場合には、これらの用途の適した屈折率や導線性を備えることが望ましい。屈折率については、波長550nmにおいて2.0以下とするのがより好ましく、導電性については、比抵抗1mΩ・cm以上、1,000,000(1M)Ω・cm以下とするのがより好ましい。
3N相当で5μm以下のZnO粉、3N相当で平均粒径5μm以下のSnO2粉、3N相当で平均粒径5μm以下のMgF2粉、3N相当で5μm以下のGa2O3粉を準備した。次に、ZnO粉とSnO2粉とMgF2粉とGa2O3粉を、ZnO:SnO2:MgF2:Ga2O3=45.5:30.4:22.9:1.25mol%の配合比に調合し、これを混合した後、粉末材料を温度850℃、圧力250kgf/cm2でホットプレス焼結してイオンプレーティング用焼結体とした。この焼結体を用いて、イオンプレーティングを実施した結果、安定したイオンプレーティングができ、作製した膜は非晶質膜であることが確認された。また、その膜の屈折率は1.87(波長550nm)に達した。
3N相当で5μm以下のZnO粉、3N相当で平均粒径5μm以下のSnO2粉、3N相当で平均粒径5μm以下のMgF2粉、3N相当で5μm以下のGa2O3粉を準備した。次に、ZnO粉とSnO2粉とMgF2粉とGa2O3粉を、ZnO:SnO2:MgF2:Ga2O3=68.21:11.76:18.24:1.79mol%の配合比に調合し、これを混合した後、粉末材料を温度850℃、圧力250kgf/cm2でホットプレス焼結してイオンプレーティング用焼結体とした。この焼結体を用いて、イオンプレーティングを実施した結果、安定したイオンプレーティングができ、作製した膜は非晶質膜であることが確認された。また、その膜の屈折率は1.87(波長550nm)に達した。
3N相当で5μm以下のZnO粉、3N相当で平均粒径5μm以下のIn2O3粉、3N相当で平均粒径5μm以下のMgF2粉、3N相当で5μm以下のGa2O3粉を準備した。次に、ZnO粉とIn2O3粉とMgF2粉とGa2O3粉を、ZnO:In2O3:MgF2:Ga2O3=66.7:21.3:14.9:8.3mol%の配合比に調合し、これを混合した後、粉末材料を温度850℃、圧力250kgf/cm2でホットプレス焼結してイオンプレーティング用焼結体とした。この焼結体を用いて、イオンプレーティングを実施した結果、安定したイオンプレーティングができ、作製した膜は非晶質膜であることが確認された。また、その膜の屈折率は1.85(波長550nm)に達した。
3N相当で5μm以下のZnO粉、3N相当で平均粒径5μm以下のIn2O3粉、3N相当で平均粒径5μm以下のMgF2粉、3N相当で5μm以下のB2O3粉を準備した。次に、ZnO粉とIn2O3粉とMgF2粉とB2O3粉を、ZnO:In2O3:MgF2:B2O3=15.4:37.7:46.3:0.5mol%の配合比に調合し、これを混合した後、粉末材料を温度850℃、圧力250kgf/cm2でホットプレス焼結してイオンプレーティング用焼結体とした。この焼結体を用いて、イオンプレーティングを実施した結果、安定したイオンプレーティングができ、作製した膜は非晶質膜であることが確認された。また、その膜の屈折率は1.90(波長550nm)に達した。
3N相当で5μm以下のZnO粉、3N相当で平均粒径5μm以下のIn2O3粉、3N相当で平均粒径5μm以下のMgF2粉、3N相当で5μm以下のB2O3粉を準備した。次に、ZnO粉とIn2O3粉とMgF2粉とB2O3粉を、ZnO:In2O3:MgF2:B2O3=41.1:12.1:45.8:1.0mol%の配合比に調合し、これを混合した後、粉末材料を温度850℃、圧力250kgf/cm2でホットプレス焼結してイオンプレーティング用焼結体とした。この焼結体を用いて、イオンプレーティングを実施した結果、安定したイオンプレーティングができ、作製した膜は非晶質膜であることが確認された。また、その膜の屈折率は1.70(波長550nm)に達した。
3N相当で5μm以下のZnO粉、3N相当で平均粒径5μm以下のSnO2粉、3N相当で平均粒径5μm以下のMgF2粉、3N相当で5μm以下のGa2O3粉を準備した。次に、ZnO粉とSnO2粉とMgF2粉とGa2O3粉を、ZnO:SnO2:MgF2:Ga2O3=25.4:38.1:25.4:3.0mol%の配合比に調合し、これを混合した後、粉末材料を温度850℃、圧力250kgf/cm2でホットプレス焼結してイオンプレーティング用焼結体とした。この焼結体を用いて、イオンプレーティングを実施した結果、安定したイオンプレーティングができ、作製した膜は非晶質膜であることが確認された。また、その膜の屈折率は1.80(波長550nm)に達した。
3N相当で5μm以下のZnO粉、3N相当で平均粒径5μm以下のSnO2粉、3N相当で平均粒径5μm以下のMgF2粉、3N相当で5μm以下のGa2O3粉を準備した。次に、ZnO粉とSnO2粉とMgF2粉とGa2O3粉を、ZnO:SnO2:MgF2:Ga2O3=31.1:57.8:8.0:3.0mol%の配合比に調合し、これを混合した後、粉末材料を温度850℃、圧力250kgf/cm2でホットプレス焼結してイオンプレーティング用焼結体とした。この焼結体を用いて、イオンプレーティングを実施した結果、安定したイオンプレーティングができ、作製した膜は非晶質膜であることが確認された。また、その膜の屈折率は1.98(波長550nm)に達した。
3N相当で5μm以下のZnO粉、3N相当で平均粒径5μm以下のSnO2粉、3N相当で平均粒径5μm以下のMgF2粉、3N相当で5μm以下のAl2O3粉、3N相当で平均粒径5μm以下のB2O3粉を準備した。次に、ZnO粉とSnO2とMgF2粉とAl2O3粉とB2O3粉を、ZnO:SnO2:MgF2:Al2O3:B2O3=68.2:14.2:15.3:1.8:0.5mol%の配合比に調合し、これを混合した後、粉末材料を真空中、温度1100℃、圧力250kgf/cm2でホットプレス焼結した。その後、この焼結体を機械加工してスパッタリングターゲット形状に仕上げた。得られたターゲットのバルク抵抗と相対密度を測定した結果、相対密度は98.2%に達し、バルク抵抗は3.1mΩ・cmとなり、安定したDCスパッタが可能であった。
次に、上記仕上げ加工したターゲットを使用して、スパッタリングを行った。スパッタ条件は、DCスパッタ、スパッタパワー500W、O2を2vol%含有するArガス圧0.5Paとし、膜厚1500~7000Åに成膜した。作製した薄膜は非晶質膜であることが確認された。また、その膜の屈折率は1.94(波長550nm)に達した。
3N相当で5μm以下のZnO粉、3N相当で平均粒径5μm以下のIn2O3粉、3N相当で平均粒径5μm以下のMgF2粉、3N相当で5μm以下のAl2O3粉、3N相当で平均粒径5μm以下のB2O3粉を準備した。次に、ZnO粉とIn2O3粉とMgF2粉とAl2O3粉とB2O3粉を、ZnO:In2O3:MgF2:Al2O3:B2O3=56:37.3:5.0:1.3:0.5mol%の配合比に調合し、これを混合した後、粉末材料を真空中、温度1100℃、圧力250kgf/cm2でホットプレス焼結した。その後、この焼結体を機械加工してスパッタリングターゲット形状に仕上げた。得られたターゲットのバルク抵抗と相対密度を測定した結果、相対密度は99.1%に達し、バルク抵抗は3.2mΩ・cmとなり、安定したDCスパッタが可能であった。
次に、上記仕上げ加工したターゲットを使用して、スパッタリングを行った。スパッタ条件は、DCスパッタ、スパッタパワー500W、O2を2vol%含有するArガス圧0.5Paとし、膜厚1500~7000Åに成膜した。作製した薄膜は非晶質膜であることが確認された。また、その膜の屈折率は1.94(波長550nm)に達した。
3N相当で5μm以下のZnO粉、3N相当で平均粒径5μm以下のSnO2粉、3N相当で平均粒径5μm以下のMgF2粉、3N相当で5μm以下のGa2O3粉を準備した。次に、ZnO粉とSnO2粉とMgF2粉とGa2O3粉を、ZnO:SnO2:MgF2:Ga2O3=21.2:31.8:45.0:2.0mol%の配合比に調合し、これを混合した後、粉末材料を温度850℃、圧力250kgf/cm2でホットプレス焼結してイオンプレーティング用焼結体とした。この焼結体を用いて、イオンプレーティングを実施した結果、作製した膜は非晶質膜であることが確認されたが、その膜の比抵抗が1MΩ・cm超となり、導電性の劣るものとなった。
3N相当で5μm以下のZnO粉、3N相当で平均粒径5μm以下のSnO2粉、3N相当で平均粒径5μm以下のMgF2粉、3N相当で5μm以下のGa2O3粉を準備した。次に、ZnO粉とSnO2粉とMgF2粉とGa2O3粉を、ZnO:SnO2:MgF2:Ga2O3=79.2:8.8:10.0:2.0mol%の配合比に調合し、これを混合した後、粉末材料を温度850℃、圧力250kgf/cm2でホットプレス焼結してイオンプレーティング用焼結体とした。この焼結体を用いて、イオンプレーティングを実施した結果、作製した膜は非晶質膜とはならなかった。
3N相当で5μm以下のZnO粉、3N相当で平均粒径5μm以下のSnO2粉、3N相当で平均粒径5μm以下のMgF2粉、3N相当で5μm以下のGa2O3粉を準備した。次に、ZnO粉とSnO2粉とMgF2粉とGa2O3粉を、ZnO:SnO2:MgF2:Ga2O3=26.6:11.4:60.0:2.0mol%の配合比に調合し、これを混合した後、粉末材料を温度850℃、圧力250kgf/cm2でホットプレス焼結してイオンプレーティング用焼結体とした。この焼結体を用いて、イオンプレーティングを実施した結果、作製した膜は非晶質膜であることが確認されたが、その膜の比抵抗が1MΩ・cm超となり、導電性の劣るものとなった。
3N相当で5μm以下のZnO粉、3N相当で平均粒径5μm以下のSnO2粉、3N相当で平均粒径5μm以下のMgF2粉、3N相当で5μm以下のGa2O3粉を準備した。次に、ZnO粉とSnO2粉とMgF2粉とGa2O3粉を、ZnO:SnO2:MgF2:Ga2O3=13.2:26.4:55.0:1.0mol%の配合比に調合し、これを混合した後、粉末材料を温度850℃、圧力250kgf/cm2でホットプレス焼結してイオンプレーティング用焼結体とした。この焼結体を用いて、イオンプレーティングを実施した結果、作製した膜は非晶質膜であることが確認されたが、その膜の比抵抗が1MΩ・cm超となり、導電性の劣るものとなった。
Claims (8)
- 亜鉛(Zn)、錫(Sn)及び/又はインジウム(In)、マグネシウム(Mg)、酸素(O)を含有する焼結体であって、Sn及び/又はInの総含有量がSnO2及び/又はIn2O3換算で10~90mol%、Znの原子数に対するSn及び/又はInの原子数の比が1以下であるとき、Mgの含有量がMgF2換算で15~50mol%、Znの原子数に対するSn及び/又はInの原子数の比が1以上であるとき、Mgの含有量がMgF2換算で1~40mol%であることを特徴とする酸化物焼結体。
- さらにガリウム(Ga)、アルミニウム(Al)及び/又はホウ素(B)を含有し、Ga及び/又はBの総含有量がGa2O3及び/又はB2O3換算で0.1~10mol%であることを特徴とする請求項1記載の酸化物焼結体。
- 請求項1又は2記載の酸化物焼結体を用いることを特徴とするスパッタリングターゲット。
- 請求項1又は2記載の酸化物焼結体を用いることを特徴とするイオンプレーティング材。
- 亜鉛(Zn)、錫(Sn)及び/又はインジウム(In)、マグネシウム(Mg)、酸素(O)を含有する薄膜であって、Sn及び/又はInの総含有量がSnO2及び/又はIn2O3換算で10~90mol%、Znの原子数に対するSn及び/又はInの原子数の比が1以下であるとき、Mgの含有量がMgF2換算で15~50mol%、Znの原子数に対するSn及び/又はInの原子数の比が1以上であるとき、Mgの含有量がMgF2換算で1~40mol%であって、非晶質であることを特徴とする薄膜。
- さらにガリウム(Ga)、アルミニウム(Al)及び/又はホウ素(B)を含有し、Ga及び/又はBの総含有量がGa2O3及び/又はB2O3換算で0.1~10mol%であることを特徴とする請求項5記載の薄膜。
- 波長550nmにおける屈折率が2.0以下であることを特徴とする請求項5又は6記載の薄膜。
- 比抵抗が1mΩ・cm~1MΩ・cmであることを特徴とする請求項5~7のいずれか一項に記載の薄膜。
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| WO2018011645A1 (en) * | 2016-07-11 | 2018-01-18 | Semiconductor Energy Laboratory Co., Ltd. | Sputtering target and method for manufacturing the same |
| CN109477206A (zh) * | 2016-07-11 | 2019-03-15 | 株式会社半导体能源研究所 | 溅射靶材及该溅射靶材的制造方法 |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN104487402A (zh) | 2015-04-01 |
| JPWO2014010383A1 (ja) | 2016-06-20 |
| JP5695221B2 (ja) | 2015-04-01 |
| TWI549924B (zh) | 2016-09-21 |
| CN104487402B (zh) | 2016-05-18 |
| TW201410637A (zh) | 2014-03-16 |
| KR101485305B1 (ko) | 2015-01-21 |
| KR20140037948A (ko) | 2014-03-27 |
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