JP6586507B2 - ニッケル電極用cog誘電体組成物 - Google Patents
ニッケル電極用cog誘電体組成物 Download PDFInfo
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- JP6586507B2 JP6586507B2 JP2018503483A JP2018503483A JP6586507B2 JP 6586507 B2 JP6586507 B2 JP 6586507B2 JP 2018503483 A JP2018503483 A JP 2018503483A JP 2018503483 A JP2018503483 A JP 2018503483A JP 6586507 B2 JP6586507 B2 JP 6586507B2
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- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/02—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances
- H01B3/12—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances ceramics
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- H01G4/1236—Ceramic dielectrics characterised by the ceramic dielectric material based on zirconium oxides or zirconates
- H01G4/1245—Ceramic dielectrics characterised by the ceramic dielectric material based on zirconium oxides or zirconates containing also titanates
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/12—Apparatus or processes for treating or working the shaped or preshaped articles for removing parts of the articles by cutting
- B28B11/125—Cutting-off protruding ridges, also profiled cutting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
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Description
誘電体層を形成するためのペーストは、本明細書に開示されているように、有機ビヒクルを、様々な酸化物を含む誘電体原料と混合して得ることができる。また、上述したように、焼成によりこのような酸化物及び複合酸化物に転化する前駆体化合物も使用できる。誘電体材料は、このような酸化物又はこのような酸化物の前駆体を含有する化合物を選択し、適切な割合でこれらを混合して得られる。誘電体原料中におけるこのような化合物の割合は、焼成後に所望の誘電体層組成物が得られるように決定される。誘電体原料は、通常、約0.1〜約3μm、より好ましくは約1μm以下の平均粒径を有する粉末状態で使用される。
有機ビヒクルは、有機溶媒中のバインダ、又は水中のバインダである。本書において使用されるバインダの選択は重要ではないが、エチルセルロース、ポリビニルブタノール、エチルセルロース、及びヒドロキシプロピルセルロース等の従来のバインダ、並びにこれらの組み合わせが溶媒と使用するのに適している。有機溶媒もまた重要ではなく、特定の適用方法(すなわち、印刷又はシート化)に従って、ブチルカルビトール、アセトン、トルエン、エタノール、ジエチレングリコールブチルエーテル;2,2,4−トリメチルペンタンジオールモノイソブチレート(テキサノール(Texanol)(登録商標));α−テルピネオール;β−テルピネオール;γ−テルピネオール;トリデシルアルコール;ジエチレングリコールエチルエーテル(カルビトール(Carbitol)(登録商標))、ジエチレングリコールブチルエーテル(ブチルカルビトール(Butyl Carbitol)(登録商標))、及びプロピレングリコール;並びにこれらの混合物など、従来の有機溶媒から選択することができる。テキサノール(登録商標)の商標で販売されている製品は、テネシー州キングスポートのイーストマンケミカル社(Eastman Chemical Company)から入手可能であり、また、ダワノール(Dowanol)(登録商標)及びカルビトール(登録商標)の商標で販売されている製品は、ミシガン州ミッドランドのダウケミカル社(Dow Chemical Co.)から入手可能である。
内部電極層を形成するペーストは、導電性材料を有機ビヒクルと混合して得ることができる。本書で使用される導電性材料には、本書に記載した導電性金属及び合金等の導電体、並びに焼成によりそのような導電体に転化する様々な化合物(例えば、酸化物、有機金属化合物、樹脂酸塩など)が含まれる。
銅、ニッケル、及び、Mn、Cr、Co、もしくはAlを選択的に含有する銅及びニッケルのいずれか又は両方の合金などの安価な金属が好ましいが、外部電極4を形成する導電体は重要ではない。外部電極層の厚さは個々の用途に合わせて調節することができるが、一般的に、前記層は厚さ約10〜約50μm、好ましくは厚さ約20〜約40μmである。外部電極を形成するためのペーストは、内部電極と同様の方法で調製される。
その後、グリーンチップは、内部電極層形成ペースト内の導電体の種類によって決定される雰囲気下で焼成される。内部電極層がニッケル及びニッケル合金などの卑金属導電体で形成される場合、焼成雰囲気は、約10−12〜約10−8atmの酸素分圧を有することができる。約10−12atm未満の低圧では、導電体が異常焼結されて誘電体層から分離する場合があるため、約10−12atm未満の分圧での焼結は避けるべきである。約10−8atmを超える酸素分圧下では、内部電極層が酸化する場合がある。約10−11〜約10−9atmの酸素分圧が最も好ましい。
純ニッケル電極、10個の活性層を備え、各層が厚さ10〜13μmである積層セラミックコンデンサを作製し、1225℃の還元性雰囲気(〜10−10atmのpO2)において焼結させた。物理的及び電気的測定が行われた。
試料1として特定された誘電体組成物は、表4に示された適量の酸化物を水中で粉砕(milling)することによって形成された。粉末は、コネティカット州ノーウォークにあるRTヴァンダービルト社(RT Vanderbilt Co., Inc.)から入手可能なポリマー分散剤(polymeric deflocculant)、1%ダーバン(Darvan)(登録商標)Cを含む1リットルポリプロピレンジャーにおいて、2mmYTZ(イットリア安定化ジルコニア)を使用して、粒子D50が約0.65μmとなるまで粉砕した。
少量のカルシウム及びチタンでドープされたジルコン酸バリウムストロンチウムマトリックス(barium-strontium-zirconate matrix)を含む誘電体材料を、焼成により(焼成時に)、形成する前駆体の混合物を含む組成物。
前記混合物が、ホウ素及びマグネシウムからなる群から選択される1つ又は複数のドーパントをさらに含む前記誘電体材料に焼成によってなる前駆体をさらに含む、項目1に記載の組成物。
前記誘電体材料が35よりも高い誘電率を示す、項目2に記載の組成物。
約26.5質量%〜約34.0質量%のBaO;
約18.0質量%〜約24.5質量%のSrO;
約41.0質量%〜約50.0質量%のZrO2;
約0.50質量%〜約1.50質量%のCaO;及び
約0.70質量%〜約2.50質量%のTiO2;
を含む誘電体材料を、焼成により(焼成時に)、形成する前駆体混合物を含む、項目1に記載の組成物。
前記前駆体混合物が、
約0.01質量%〜約1.0質量%のB2O3;及び
約0.01質量%〜約1.47質量%のMgO;
をさらに含む、項目4に記載の組成物。
約26.5質量%〜約34.0質量%のBaO;
約18.0質量%〜約24.5質量%のSrO;
約41.0質量%〜約50.0質量%のZrO2;
約0.50質量%〜約1.50質量%のCaO;
約0.70質量%〜約2.50質量%のTiO2;
約0.10質量%〜約1.0質量%のB2O3;及び
約0.31質量%〜約1.47質量%のMgO;
を含む誘電体材料を、焼成により、形成する前駆体混合物を含む、項目2に記載の組成物。
固体部(solids portion)を含み、
前記固体部が、
約26.5質量%〜約34.0質量%のBaO;
約18.0質量%〜約24.5質量%のSrO;
約41.0質量%〜約50.0質量%のZrO2;
約0.50質量%〜約1.50質量%のCaO;及び
約0.70質量%〜約2.50質量%のTiO2;
を含む、鉛フリーかつカドミウムフリーの誘電体ペースト。
約0.01質量%〜約1.0質量%のB2O3;
約0.01質量%〜約1.47質量%のMgO;
約0.01質量%〜約1.78質量%のH3BO3;及び
約0.01質量%〜約2.14質量%のMg(OH)2;
からなる群から選択される少なくとも1つをさらに含む、請求項7に記載の鉛フリーかつカドミウムフリーの誘電体ペースト。
項目7又は項目8に記載の誘電体ペーストを基材に塗布(適用)する工程と、
前記誘電体ペーストを焼結するのに十分な温度で前記基材を焼成する工程と、
を含む、電子部品を形成する方法。
前記焼成は、約1200℃〜約1350℃の温度で行う、項目9に記載の方法。
前記焼成は、約10−12atm〜約10−8atmの酸素分圧を有する雰囲気で行う、項目9に記載の方法。
項目7又は項目8に記載の誘電体ペーストの層と、
Ag、Au、Pd、又はPt以外の遷移金属を含む内部電極材料の層と、
が交互に積層された焼成集合体(fired collection)を備える積層セラミックチップコンデンサ。
前記内部電極材料がニッケルを含む、項目12に記載の積層セラミックチップコンデンサ。
基材上に、
項目7又は項目8に記載の誘電体ペーストの層と、
金属含有電極ペーストの層と、
を交互に塗布(適用)して、薄層積層体(laminar stack)を形成する工程と;
前記薄層積層体を所定の形状に切断する工程と、
切断した前記積層体を前記基材から分離する工程と、
前記積層体を焼成して、前記電極ペースト中の前記金属を緻密化すると共に、前記誘電体ペーストを焼結する工程と、を含み、
前記内部電極層及び前記誘電体層が、それぞれ、層の厚さを有する、電子部品を形成する方法。
焼成後に、前記誘電体の層が約1μm〜約50μmの厚さを有する、項目14に記載の方法。
前記焼成は、約1200℃〜約1350℃の温度で行う、項目14に記載の方法。
前記焼成は、約10−12atm〜約10−8atmの酸素分圧を有する雰囲気で行う、項目14に記載の方法。
前記金属含有電極ペーストがニッケルを含む、項目14に記載の方法。
固体部を含み、
前記固体部が、
約34.1質量%〜約43.8質量%のBaCO3;
約25.6質量%〜約34.9質量%のSrCO3;
約41.0質量%〜約50.0質量%のZrO2;
約0.70質量%〜約2.50質量%のTiO2;及び
約0.89質量%〜約2.70質量%のCaCO3;
を含む、鉛フリーかつカドミウムフリーの誘電体ペースト。
約0.01質量%〜約1.0質量%のB2O3;
約0.01質量%〜約1.47質量%のMgO;
約0.01質量%〜約1.78質量%のH3BO3;及び
約0.01質量%〜約2.14質量%のMg(OH)2;
からなる群から選択される少なくとも1つをさらに含む、請求項19に記載の鉛フリーかつカドミウムフリーの誘電体ペースト。
項目19又は項目20に記載の誘電体ペーストを基材に塗布(適用)する工程と、
前記誘電体ペーストを焼結するのに十分な温度で前記基材を焼成する工程と、
を含む、電子部品を形成する方法。
前記焼成は、約1200℃〜約1350℃の温度で行う、項目21に記載の方法。
前記焼成は、約10−12atm〜約10−8atmの酸素分圧を有する雰囲気で行う、項目21に記載の方法。
項目19又は項目20に記載の誘電体ペーストの層と、
Ag、Au、Pd、又はPt以外の遷移金属を含む内部電極材料の層と、
が交互に積層された焼成集合体を備える積層セラミックチップコンデンサ。
前記内部電極材料がニッケルを含む、項目24に記載の積層セラミックチップコンデンサ。
基材上に、
項目19又は項目20に記載の誘電体ペーストの層と、
金属含有電極ペーストの層と、
を交互に塗布(適用)して、薄層積層体を形成する工程と;
前記薄層積層体を所定の形状に切断する工程と、
切断した前記積層体を前記基材から分離する工程と、
前記積層体を焼成して、前記電極ペースト中の前記金属を緻密化すると共に、前記誘電体ペーストを焼結する工程と、を含み、
前記内部電極層及び前記誘電体層が、それぞれ、層の厚さを有する、電子部品を形成する方法。
焼成後に、前記誘電体の層が約1μm〜約50μmの厚さを有する、項目26に記載の方法。
前記焼成は、約1200℃〜約1350℃の温度で行う、項目26に記載の方法。
前記焼成は、約10−12atm〜約10−8atmの酸素分圧を有する雰囲気で行う、項目26に記載の方法。
前記金属含有電極ペーストがニッケルを含む、項目26に記載の方法。
固体部を含み、
前記固体部が、
約47.8質量%〜約61.3質量%のBaZrO3;
約1.6質量%〜約5.7質量%のSrTiO3;
約39.4質量%〜約53.6質量%のSrZrO3;
約1.2質量%〜約3.6質量%のCaTiO3;及び
約1.6質量%〜約4.8質量%のCaZrO3;
を含む、鉛フリーかつカドミウムフリーの誘電体ペースト。
前記固体部が、
約0.01質量%〜約7.3質量%のBaTiO3;
約0.01質量%〜約1.0質量%のB2O3;
約0.01質量%〜約1.47質量%のMgO;
約0.01質量%〜約1.78質量%のH3BO3;及び
約0.01質量%〜約2.14質量%のMg(OH)2;
からなる群から選択される少なくとも1つをさらに含む、請求項31に記載の誘電体ペースト。
項目31又は項目32に記載の誘電体ペーストを基材に塗布(適用)する工程と、
前記誘電体ペーストを焼結するのに十分な温度で前記基材を焼成する工程と、
を含む、電子部品を形成する方法。
前記焼成は、約1200℃〜約1350℃の温度で行う、項目33に記載の方法。
前記焼成は、約10−12atm〜約10−8atmの酸素分圧を有する雰囲気で行う、項目33に記載の方法。
項目31又は項目32に記載の誘電体材料の層と、
Ag、Au、Pd、又はPt以外の遷移金属を含む内部電極材料の層と、
が交互に積層された焼成集合体を備える積層セラミックチップコンデンサ。
前記内部電極材料がニッケルを含む、項目36に記載の積層セラミックチップコンデンサ。
基材上に、
項目31又は項目32に記載の誘電体ペーストの層と、
金属含有電極ペーストの層と、
を交互に塗布(適用)して、薄層積層体を形成する工程と;
前記薄層積層体を所定の形状に切断する工程と、
切断した前記積層体を前記基材から分離する工程と、
前記積層体を焼成して、前記電極ペースト中の前記金属を緻密化すると共に、前記誘電体ペーストを焼結する工程と、を含み、
前記内部電極層及び前記誘電体層が、それぞれ、層の厚さを有する、電子部品を形成する方法。
焼成後に、前記誘電体の層が約1μm〜約50μmの厚さを有する、項目38に記載の方法。
前記焼成は、約1200℃〜約1350℃の温度で行う、項目38に記載の方法。
前記焼成は、約10−12atm〜約10−8atmの酸素分圧を有する雰囲気で行う、項目38に記載の方法。
前記金属含有電極ペーストがニッケルを含む、項目38に記載の方法。
固体部を含み、
前記固体部が、
約47.8質量%〜約61.3質量%のBaZrO3;
約39.4質量%〜約53.6質量%のSrZrO3;
約1.2質量%〜約3.6質量%のCaTiO3;
約0.1質量%〜約2.14質量%のMg(OH)2;及び
約0.1質量%〜約1.78質量%のH3BO3;
を含む、鉛フリーかつカドミウムフリーの誘電体ペースト。
項目43に記載の誘電体ペーストを基材に塗布(適用)する工程と、
前記誘電体ペーストを焼結するのに十分な温度で前記基材を焼成する工程と、
を含む、電子部品を形成する方法。
前記焼成は、約1200℃〜約1350℃の温度で行う、項目44に記載の方法。
前記焼成は、約10−12atm〜約10−8atmの酸素分圧を有する雰囲気で行う、項目44に記載の方法。
項目43に記載の誘電体ペーストの層と、
Ag、Au、Pd、又はPt以外の遷移金属を含む内部電極材料の層と、
が交互に積層された焼成集合体を備える積層セラミックチップコンデンサ。
前記内部電極材料がニッケルを含む、項目47に記載の積層セラミックチップコンデンサ。
基材上に、
項目43に記載のペーストを含む誘電体材料の層と、
金属含有電極ペーストの層と、
を交互に塗布(適用)して、薄層積層体を形成する工程と;
前記薄層積層体を所定の形状に切断する工程と、
切断した前記積層体を前記基材から分離する工程と、
前記積層体を焼成して、前記電極ペースト中の前記金属を緻密化すると共に、前記誘電体ペーストを焼結する工程と、を含み、
前記内部電極層及び前記誘電体層が、それぞれ、層の厚さを有する、電子部品を形成する方法。
焼成後に、前記誘電体の層が約1μm〜約50μmの厚さを有する、項目49に記載の方法。
前記焼成は、約1200℃〜約1350℃の温度で行う、項目49に記載の方法。
前記焼成は、約10−12atm〜約10−8atmの酸素分圧を有する雰囲気で行う、項目49に記載の方法。
前記金属含有電極ペーストがニッケルを含む、項目49に記載の方法。
前記誘電体層及び前記電極層の端部に銅含有ペーストを塗布(適用)する工程と、焼成して、積層コンデンサを形成する工程と、をさらに含む、項目14、26、38又は49のいずれかに記載の方法。
2 誘電体層
3 内部電極層
4 外部電極
Claims (21)
- 26.5質量%〜34.0質量%のBaO;
18.0質量%〜24.5質量%のSrO;
41.0質量%〜50.0質量%のZrO2;
0.50質量%〜1.50質量%のCaO;及び
0.70質量%〜2.50質量%のTiO2;
を含む誘電体材料を焼成により形成する前駆体混合物を含む、組成物。 - 焼成により、前記誘電体材料が、
0.01質量%〜1.0質量%のB2O3;及び
0.01質量%〜1.47質量%のMgO;
をさらに含むような前駆体をさらに含む、請求項1に記載の組成物。 - 固体部を含み、
前記固体部が請求項1に記載の誘電体材料を含む、鉛フリーかつカドミウムフリーの誘電体ペースト。 - 前記固体部が、
0.01質量%〜1.0質量%のB2O3;
0.01質量%〜1.47質量%のMgO;
0.01質量%〜1.78質量%のH3BO3;及び
0.01質量%〜2.14質量%のMg(OH)2;
からなる群から選択される少なくとも1つをさらに含む、請求項3に記載の鉛フリーかつカドミウムフリーの誘電体ペースト。 - 請求項3又は請求項4に記載の誘電体ペーストを基材に塗布する工程と、
前記誘電体ペーストを焼結するのに十分な温度で前記基材を焼成する工程と、
を含む、電子部品を形成する方法。 - 前記焼成は、1200℃〜1350℃の温度で行う、請求項5に記載の方法。
- 請求項3又は請求項4に記載の誘電体ペーストの層と、
Ag、Au、Pd、又はPt以外の遷移金属を含む内部電極材料の層と、
が交互に積層された焼成集合体を備える積層セラミックチップコンデンサ。 - 前記内部電極材料がニッケルを含む、請求項7に記載の積層セラミックチップコンデンサ。
- 基材上に、
少なくとも1つの誘電体層を形成するための、請求項3又は請求項4に記載の誘電体ペーストの層、及び
少なくとも1つの内部電極層を形成するための金属含有電極ペーストの層
を交互に塗布して、薄層積層体を形成する工程と;
前記薄層積層体を所定の形状に切断する工程と、
切断した前記積層体を前記基材から分離する工程と、
前記積層体を焼成して、前記電極ペースト中の前記金属を緻密化すると共に、前記誘電体ペーストを焼結する工程と、を含み、
前記内部電極層及び前記誘電体層がそれぞれ層の厚さを有する、電子部品を形成する方法。 - 前記焼成は、1200℃〜1350℃の温度で行う、請求項9に記載の方法。
- 前記焼成は、10−12atm〜10−8atmの酸素分圧を有する雰囲気で行う、請求項9に記載の方法。
- 47.8質量%〜61.3質量%のBaZrO3;
39.4質量%〜53.6質量%のSrZrO3;
1.2質量%〜3.6質量%のCaTiO3;
0.1質量%〜2.14質量%のMg(OH)2;及び
0.1質量%〜1.78質量%のH3BO3;
を含む、鉛フリーかつカドミウムフリーの誘電体組成物。 - 固体部を含み、
前記固体部が、
47.8質量%〜61.3質量%のBaZrO3;
39.4質量%〜53.6質量%のSrZrO3;
1.2質量%〜3.6質量%のCaTiO3;
0.1質量%〜2.14質量%のMg(OH)2;及び
0.1質量%〜1.78質量%のH3BO3;
を含む、鉛フリーかつカドミウムフリーの誘電体ペースト。 - 請求項13に記載の誘電体ペーストを基材に塗布する工程と、
前記誘電体ペーストを焼結するのに十分な温度で前記基材を焼成する工程と、
を含む、電子部品を形成する方法。 - 前記焼成は、1200℃〜1350℃の温度で行う、請求項14に記載の方法。
- 前記焼成は、10−12atm〜10−8atmの酸素分圧を有する雰囲気で行う、請求項14に記載の方法。
- 請求項13に記載の誘電体ペーストの層と、
Ag、Au、Pd、又はPt以外の遷移金属を含む内部電極材料の層と、
が交互に積層された焼成集合体を備える積層セラミックチップコンデンサ。 - 前記内部電極材料がニッケルを含む、請求項17に記載の積層セラミックチップコンデンサ。
- 基材上に、
少なくとも1つの誘電体層を形成するための、請求項13に記載のペーストを含む誘電体材料の層、及び
少なくとも1つの内部電極層を形成するための金属含有電極ペーストの層
を交互に塗布して、薄層積層体を形成する工程と;
前記薄層積層体を所定の形状に切断する工程と、
切断した前記積層体を前記基材から分離する工程と、
前記積層体を焼成して、前記電極ペースト中の前記金属を緻密化すると共に、前記誘電体ペーストを焼結する工程と、を含み、
前記少なくとも1つの内部電極層及び前記少なくとも1つの誘電体層がそれぞれ層の厚さを有する、電子部品を形成する方法。 - 前記焼成は、1200℃〜1350℃の温度で行う、請求項19に記載の方法。
- 前記焼成は、10−12atm〜10−8atmの酸素分圧を有する雰囲気で行う、請求項19に記載の方法。
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| US62/195,842 | 2015-07-23 | ||
| PCT/US2016/039502 WO2017014918A1 (en) | 2015-07-23 | 2016-06-27 | Cog dielectric composition for use with nickel electrodes |
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| KR20190121137A (ko) | 2018-08-06 | 2019-10-25 | 삼성전기주식회사 | 유전체 조성물 및 이를 이용한 전자 부품 |
| WO2020176584A1 (en) * | 2019-02-27 | 2020-09-03 | Ferro Corporation | Ltcc dielectric compositions and devices having high q factors |
| KR102938186B1 (ko) * | 2021-09-15 | 2026-03-12 | 삼성전기주식회사 | 적층형 커패시터 |
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| EP3268329A4 (en) | 2019-01-09 |
| TW201722883A (zh) | 2017-07-01 |
| KR102024028B1 (ko) | 2019-09-23 |
| US9852848B2 (en) | 2017-12-26 |
| CN107848893A (zh) | 2018-03-27 |
| EP3892600A1 (en) | 2021-10-13 |
| EP3892600B1 (en) | 2023-12-20 |
| SI3892600T1 (sl) | 2024-05-31 |
| US20170200557A1 (en) | 2017-07-13 |
| CN107848893B (zh) | 2021-12-31 |
| TWI634092B (zh) | 2018-09-01 |
| WO2017014918A1 (en) | 2017-01-26 |
| JP2018529608A (ja) | 2018-10-11 |
| EP3268329A1 (en) | 2018-01-17 |
| KR20180011162A (ko) | 2018-01-31 |
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