JP6530713B2 - 酸化物層の成膜方法、並びにエピタキシャル成長用積層基材及びその製造方法 - Google Patents
酸化物層の成膜方法、並びにエピタキシャル成長用積層基材及びその製造方法 Download PDFInfo
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- JP6530713B2 JP6530713B2 JP2015535428A JP2015535428A JP6530713B2 JP 6530713 B2 JP6530713 B2 JP 6530713B2 JP 2015535428 A JP2015535428 A JP 2015535428A JP 2015535428 A JP2015535428 A JP 2015535428A JP 6530713 B2 JP6530713 B2 JP 6530713B2
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/34—Sputtering
- C23C14/35—Sputtering by application of a magnetic field, e.g. magnetron sputtering
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- C—CHEMISTRY; METALLURGY
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
- C23C14/08—Oxides
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
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- C23C14/083—Oxides of refractory metals or yttrium
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- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
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- C23C14/541—Heating or cooling of the substrates
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- C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
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- C23C28/321—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer with at least one metal alloy layer
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
- C23C28/32—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer
- C23C28/322—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer only coatings of metal elements only
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
- C23C28/34—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates
- C23C28/345—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates with at least one oxide layer
- C23C28/3455—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates with at least one oxide layer with a refractory ceramic layer, e.g. refractory metal oxide, ZrO2, rare earth oxides or a thermal barrier system comprising at least one refractory oxide layer
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- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B23/00—Single-crystal growth by condensing evaporated or sublimed materials
- C30B23/02—Epitaxial-layer growth
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- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B29/00—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape
- C30B29/10—Inorganic compounds or compositions
- C30B29/16—Oxides
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N60/00—Superconducting devices
- H10N60/01—Manufacture or treatment
- H10N60/0268—Manufacture or treatment of devices comprising copper oxide
- H10N60/0296—Processes for depositing or forming copper oxide superconductor layers
- H10N60/0576—Processes for depositing or forming copper oxide superconductor layers characterised by the substrate
- H10N60/0632—Intermediate layers, e.g. for growth control
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- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B29/00—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape
- C30B29/10—Inorganic compounds or compositions
- C30B29/16—Oxides
- C30B29/22—Complex oxides
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- Organic Chemistry (AREA)
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- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- Inorganic Chemistry (AREA)
- Crystallography & Structural Chemistry (AREA)
- Ceramic Engineering (AREA)
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Description
最表層のc軸配向率が99%以上である結晶配向した金属基板上に、前記金属基板上の成膜位置における垂線と、前記成膜位置から最短距離にあるターゲット上の垂直方向の磁束密度0地点へ至る線とが成す角度を15°以内にしてRFマグネトロンスパッタリングを行う工程を含む前記成膜方法。
最表層のc軸配向率が99%以上である結晶配向した金属基板を準備する工程と、
前記金属基板上に、前記金属基板上の成膜位置における垂線と、前記成膜位置から最短距離にあるターゲット上の垂直方向の磁束密度0地点へ至る線とが成す角度を15°以内にしてRFマグネトロンスパッタリングを行い、酸化物層を形成する工程と、
を含む前記製造方法。
前記酸化物層のΔφcが、前記金属基板の最表層のΔφmに対し、Δφc≦Δφm−0.5°の関係を満たす前記エピタキシャル成長用積層基材。
前記酸化物層のΔωcが、前記金属基板の最表層のΔωmに対し、Δωc≦Δωm−1.2°の関係を満たす前記エピタキシャル成長用積層基材。
金属基板は、最表層のc軸配向率が99%以上であることを要する。c軸配向率は、X線回折のθ/2θ測定での(200)面の回折ピーク強度率から求められ、(200)面が金属基板の表面と垂直になっている割合を示している。具体的には、c軸配向率(%)=I(200)/ΣI(hkl)×100(%)により求められる。また、最表層の面内配向度(Δφ)及び面外配向度(Δω)については、Δφ≦6°、Δω≦8°であることが好ましく、特に超電導線材に用いる場合は、Δφ≦5°、Δω≦6°であることがより好ましい。いずれも、最表層のEBSD(Electron Back Scatter Diffraction:電子後方散乱回折)測定により求めることができる。EBSDとは、SEM(Scanning Electron Microscope:走査電子顕微鏡)内で試料に電子線を照射したときに生じる反射電子菊池線回折(菊池パターン)を利用して結晶方位を解析する技術である。通常、電子線は最表層表面に照射され、このとき得られる情報は電子線が侵入する数十nmの深さまでの方位情報、すなわち最表層の方位情報である。
(ワット浴)
硫酸ニッケル 200〜300g/l
塩化ニッケル 30〜60g/l
ホウ酸 30〜40g/l
pH 4〜5
浴温 40〜60℃
(スルファミン酸浴)
スルファミン酸ニッケル 200〜600g/l
塩化ニッケル 0〜15g/l
ホウ酸 30〜40g/l
添加剤 適量
pH 3.5〜4.5
浴温 40〜70℃
非磁性の金属板としてSUS316L(厚さ100μm)を用い、高圧延金属層として、圧下率96.8%で圧延された銅箔(厚さ48μm)を用いた。SUS316Lと銅箔とを、表面活性化接合装置を用いて常温で表面活性化接合し、SUS316Lと銅箔の積層材を形成した。表面活性化接合においては、スパッタエッチングを、0.1Pa下で、プラズマ出力を200W、接合面へのスパッタ照射時間を20秒の条件で実施し、SUS316L及び銅箔上の吸着物層を完全に除去した。また、圧延ロールでの加圧は600MPaとした。
(スルファミン酸浴)
スルファミン酸ニッケル 450g/l
塩化ニッケル 5g/l
ホウ酸 30g/l
添加剤 5ml/l
EBSD(日本電子株式会社SEM-840及び株式会社TSLソリューションズDigiView、以下同じ)及び結晶方位解析ソフト(EDAX社OIM Data Collection及びOIM Analysis、以下同じ)を用い、「Crystal Direction」の<111>‖NDを用いて以下の方法で解析することにより得た。
EBSD及び結晶方位解析ソフトを用い、「Crystal Direction」の<001>‖NDを用いて以下の方法で解析することにより得た。
EBSD及び結晶方位解析ソフトを用いて解析し、1mm2当たりの結晶方位がずれている面積の割合を求めた。具体的には、金属基板の保護層(Niめっき層)の測定においては結晶方位が(001)[100]から4°以上6°未満ずれている面積の割合及び6°以上ずれている面積の割合を、酸化物層(CeO2層)の測定においては結晶方位が(001)[110]から4°以上6°未満ずれている面積の割合及び6°以上ずれている面積の割合を求めた。
上記の金属基板20に代えて、金属基板上にCeO2からなる酸化物層(下層)を形成したものを用い、この下層に対して、さらにYSZからなる別の酸化物層(上層)をRFマグネトロンスパッタリングにより成膜した以外は、上記実施例と同様にしてエピタキシャル成長用積層基材を製造し、角度αが8.53°となる成膜位置における結晶配向性を評価した。その結果を表2に示す。
10a 垂直方向の磁束密度0地点
20 金属基板
20a 成膜位置
Claims (7)
- RFマグネトロンスパッタ法により金属基板上へ酸化物層を成膜する方法であって、
最表層のc軸配向率が99%以上である結晶配向した金属基板上における成膜位置を選択する工程と、
前記成膜位置における垂線と、前記成膜位置から最短距離にあるターゲット上の垂直方向の磁束密度0地点へ至る線とが成す角度を15°以内にしてRFマグネトロンスパッタリングを行う工程を含み、
前記RFマグネトロンスパッタリングを行った後、前記成膜位置には、前記角度が15°以内である状態で成膜された酸化物層のみが存在する前記成膜方法。 - 前記最表層の面内配向度Δφが、Δφ≦6°である請求項1に記載の酸化物層の成膜方法。
- 前記RFマグネトロンスパッタリングが、金属基板の温度を350℃以上600℃未満として行われる請求項1又は2に記載の酸化物層の成膜方法。
- 金属基板と、前記金属基板の上に形成された酸化物層とを含むエピタキシャル成長用積層基材の製造方法であって、
最表層のc軸配向率が99%以上である結晶配向した金属基板を準備する工程と、
前記金属基板上における成膜位置を選択する工程と、
前記成膜位置における垂線と、前記成膜位置から最短距離にあるターゲット上の垂直方向の磁束密度0地点へ至る線とが成す角度を15°以内にしてRFマグネトロンスパッタリングを行い、酸化物層を形成する工程と、
を含み、
前記RFマグネトロンスパッタリングを行った後、前記成膜位置には、前記角度が15°以内である状態で成膜された酸化物層のみが存在する前記製造方法。 - 前記酸化物層が、CeO2からなる請求項4に記載のエピタキシャル成長用積層基材の製造方法。
- 前記金属基板の最表層が、Ni又はNi合金からなる請求項4又は5に記載のエピタキシャル成長用積層基材の製造方法。
- 金属基板と、前記金属基板の上に形成された酸化物層とを含むエピタキシャル成長用積層基材であって、
前記金属基板の最表層のc軸配向率が99%以上であり、
前記酸化物層の面内配向度Δφcが、前記金属基板の最表層の面内配向度Δφmに対し、Δφc≦Δφm−0.5°の関係を満たし、Δφm≦6°である前記エピタキシャル成長用積層基材。
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