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公开(公告)号：US09627135B2
公开(公告)日：2017-04-18
申请号：US14945829
申请日：2015-11-19
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Takafumi Okamoto , Shoichiro Suzuki
CPC classification number: H01G4/1245 , C04B35/49 , C04B2235/3206 , C04B2235/3213 , C04B2235/3215 , C04B2235/3217 , C04B2235/3225 , C04B2235/3227 , C04B2235/3229 , C04B2235/3232 , C04B2235/3239 , C04B2235/3244 , C04B2235/3262 , C04B2235/3418 , C04B2235/6584 , C04B2235/768 , C04B2235/79 , H01G4/012 , H01G4/1209 , H01G4/1218 , H01G4/1236 , H01G4/248 , H01G4/30
Abstract: A ceramic capacitor having dielectric ceramic layers that include Ba, Re (Re is at least one of La, Ce, Pr, Nd, and Sm), Ti, Zr, M (M is at least one of Mg, Al, Mn, and V), Si, and optionally Sr, where at least some of the Ba, Re, Ti, and Zr and optionally Sr are in the form of a perovskite compound. Respective amounts, expressed as parts by mol, of the elements of the dielectric ceramic layers satisfy, with respect to a total of 100 of the Ti amount and the Zr amount, 0≦a≦20.0 where a is the Sr amount; 0.5≦b≦10.0 where b is the Re amount; 46≦c≦90 where c is the Zr amount; 0.5≦d≦10.0 where d is the M amount; 0.5≦e≦5.0 where e is the Si amount; and 0.990≦m≦1.050 where m is a ratio of a total of the Ba amount, the Sr amount, and the Re amount, to the total of the Ti amount and the Zr amount.
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公开(公告)号：US09362053B2
公开(公告)日：2016-06-07
申请号：US14583923
申请日：2014-12-29
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Takafumi Okamoto
CPC classification number: H01G4/1227 , H01G4/012 , H01G4/248 , H01G4/30 , H01G13/04
Abstract: A multilayer ceramic capacitor includes a multilayer body including a plurality of stacked dielectric layers including a dielectric ceramic that includes a plurality of crystal grains and a plurality of internal electrodes disposed at a plurality of interfaces between the dielectric layers, and external electrodes. The multilayer body includes a Ba and Ti containing perovskite compound, La, Mg and Mn, and satisfies conditions such that in a case in which a content of Ti is set to 100 molar parts, a fraction of each content of La, Mg and Mn relative to the content of Ti is such that La is about 1.2 to about 6.0 molar parts, Mg is about 0.5 to about 5.0 molar parts and Mn is about 1.0 to about 3.0 molar parts, and an average number of crystal grains included in each of the dielectric layers in the stacking direction is one or more to three or less.
Abstract translation: 一种多层陶瓷电容器包括：多层体，其包括多个堆叠的电介质层，包括包含多个晶粒的电介质陶瓷和设置在所述电介质层之间的多个界面处的多个内部电极和外部电极。 多层体包括含有Ba和Ti的钙钛矿化合物La，Mg和Mn，并且满足条件，即在Ti含量为100摩尔份数的情况下，La，Mg和Mn的各含量的分数 相对于Ti的含量使得La为约1.2至约6.0摩尔份，Mg为约0.5至约5.0摩尔份，Mn为约1.0至约3.0摩尔份，并且Mn的平均数包括在 层叠方向的电介质层为1个以上3个以下。
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公开(公告)号：US20190057813A1
公开(公告)日：2019-02-21
申请号：US16167665
申请日：2018-10-23
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Takafumi Okamoto
Abstract: A multilayer ceramic capacitor having a ceramic sintered body with alternately laminated dielectric layers and internal electrodes. The dielectric layers are formed from a perovskite-type compound represented by the general formula ABO3, and the perovskite-type compound contains at least Ti and a volatile element that forms a solid solution at a B site thereof. The internal electrodes are formed from a base metal material and contain the volatile element. The content of the volatile element is greater than 0 parts by mole and less than or equal to 0.2 parts by mole with respect to 100 parts by mole of the constituent element at the B site, and excluding the volatile element at the B site.
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公开(公告)号：US09570235B2
公开(公告)日：2017-02-14
申请号：US14983859
申请日：2015-12-30
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Takafumi Okamoto
CPC classification number: H01G4/1227 , B32B18/00 , C04B35/468 , C04B35/4682 , C04B35/62675 , C04B35/62685 , C04B35/634 , C04B35/638 , C04B2235/3206 , C04B2235/3217 , C04B2235/3224 , C04B2235/3225 , C04B2235/3251 , C04B2235/3262 , C04B2235/3418 , C04B2235/6025 , C04B2235/6582 , C04B2235/6588 , C04B2237/346 , C04B2237/68 , C04B2237/704 , H01B3/12 , H01G4/012 , H01G4/242 , H01G4/30
Abstract: A multilayer ceramic capacitor that is highly resistant to insulation degradation under high-temperature load includes an inner ceramic layer that has a composition mainly composed of a perovskite-type compound containing Ba and Ti, at least one of Nb and Ta, contains Mn and Al, and optionally contains Mg and a rare-earth element that is at least one of Y, Gd, Tb, Dy, Ho, and Er, with a content of Ti being 100 parts by mole, and (a) a total of Nb and Ta is from about 0.2 to about 1.5 part by mole, (b) Mg is not more than about 0.2 part by mole including 0 part by mole, (c) Mn is from about 1.0 to about 3.5 parts by mole, (d) Al is from about 1.0 to about 4.0 parts by mole, and (e) the rare-earth element is not more than about 0.05 part by mole including 0 part by mole. Furthermore, an average number of particles per one layer of the inner ceramic layer is not more than 3.
Abstract translation: 在高温负荷下耐高温绝缘性降低的多层陶瓷电容器具有主要由含有Ba和Ti的钙钛矿型化合物组成的内部陶瓷层，Nb和Ta中的至少一种含有Mn和Al ，并且任选地含有Mg和作为Y，Gd，Tb，Dy，Ho和Er中的至少一种的稀土元素，Ti的含量为100摩尔％，（a）Nb和 Ta为约0.2〜约1.5摩尔％，（b）Mg不大于约0.2份摩尔，包括0份（摩尔），（c）Mn为约1.0至约3.5份摩尔，（d）Al 为约1.0至约4.0份摩尔，和（e）稀土元素不超过约0.05份摩尔，包括0份（摩尔）。 此外，内层陶瓷层每层的平均颗粒数不多于3个。
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5.发明授权公开(公告)号：US09324497B2
公开(公告)日：2016-04-26
申请号：US14051147
申请日：2013-10-10
Inventor： Takafumi Okamoto , Minoru Osada , Takayoshi Sasaki
IPC: H01G4/10 , H01G4/33 , H01G4/18 , H01L51/05 , H01L49/02 , H01G4/018 , H01L29/94 , H01G4/20 , H01L51/00
CPC classification number: H01G4/10 , H01G4/018 , H01G4/18 , H01G4/206 , H01G4/33 , H01L28/40 , H01L29/94 , H01L51/0037 , H01L51/0579
Abstract: A thin film capacitor includes a substrate and a dielectric thin film element formed on the substrate. The substrate can include an Si plate, an SiO2 film on the Si plate, and a Ti film formed on the SiO2 film. The dielectric thin film element includes a lower electrode, a dielectric thin film on the lower electrode, and an upper electrode formed on the dielectric thin film. The dielectric thin film is a thin film formed of a nanosheet, and a void portion of the dielectric thin film is filled with a p-type conductive organic polymer. Ti0.87O2, Ca2Nb3O10 or the like, is used as a dielectric material to form a major component of the nanosheet. As the p-type conductive organic polymer, polypyrrole, polyaniline, polyethylene dioxythiophene or the like, is suitable.
Abstract translation: 薄膜电容器包括在基板上形成的基板和电介质薄膜元件。 基板可以包括Si板，Si板上的SiO 2膜和形成在SiO 2膜上的Ti膜。 电介质薄膜元件包括下电极，下电极上的电介质薄膜和形成在电介质薄膜上的上电极。 电介质薄膜是由纳米片形成的薄膜，电介质薄膜的空隙部分填充有p型导电有机聚合物。 Ti0.87O2，Ca2Nb3O10等用作电介质材料以形成纳米片的主要成分。 作为p型导电性有机聚合物，可以使用聚吡咯，聚苯胺，聚乙烯二氧噻吩等。
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Patent Agency Ranking
6.发明授权Multilayer ceramic capacitor and method for manufacturing multilayer ceramic capacitor 有权多层陶瓷电容器及多层陶瓷电容器制造方法公开(公告)号：US09153382B2
公开(公告)日：2015-10-06
申请号：US13936410
申请日：2013-07-08
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Takafumi Okamoto , Noriyuki Inoue
IPC: H01G4/06 , C04B35/00 , H01G4/12 , C01G23/00 , C01G25/00 , C04B35/468 , C04B35/49 , H01B3/12 , H01G4/30
CPC classification number: H01G4/1209 , C01G23/006 , C01G25/006 , C01P2002/34 , C01P2002/50 , C01P2006/40 , C04B35/4682 , C04B35/49 , C04B2235/3206 , C04B2235/3208 , C04B2235/3213 , C04B2235/3215 , C04B2235/3224 , C04B2235/3225 , C04B2235/3227 , C04B2235/3229 , C04B2235/3262 , C04B2235/3418 , C04B2235/652 , C04B2235/6582 , C04B2235/6584 , C04B2235/6588 , H01B3/12 , H01G4/1227 , H01G4/30
Abstract: A multilayer ceramic capacitor exhibits superior life characteristics in a high temperature load test despite the use of very thin dielectric layers. As a dielectric ceramic constituting a dielectric layer of the multilayer ceramic capacitor, a perovskite-type compound is used and contains Ba and Ti (a portion of Ba can be replaced with at least one of Ca and Sr, and a portion of Ti can be replaced with Zr) as a main component, and including La within the range of 2-6 parts by mole, Mg within the range of 3-5 parts by mole, and Mn within the range of 1.5-3 parts by mole in a case where a total content of Ti and Zr is 100 parts by mole.
Abstract translation: 尽管使用非常薄的电介质层，但是在高温负载测试中，多层陶瓷电容器具有优异的寿命特性。 作为构成多层陶瓷电容器的电介质层的电介质陶瓷，使用钙钛矿型化合物，含有Ba和Ti（Ba的一部分可以用Ca和Sr中的至少一种代替，Ti的一部分可以 以Zr为主成分），其中La为2-6摩尔％，Mg为3-5摩尔％，Mn为1.5〜3摩尔的范围， 其中Ti和Zr的总含量为100份摩尔。
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公开(公告)号：US20170133155A1
公开(公告)日：2017-05-11
申请号：US15410046
申请日：2017-01-19
Applicant: Murata Manufacturing Co., Ltd.
Inventor： SHOICHIRO SUZUKI , Takafumi Okamoto
CPC classification number: H01G4/30 , B32B18/00 , C04B35/4682 , C04B35/49 , C04B35/6261 , C04B35/62675 , C04B35/62685 , C04B35/6342 , C04B35/638 , C04B2235/3215 , C04B2235/3232 , C04B2235/3234 , C04B2235/3236 , C04B2235/3239 , C04B2235/3244 , C04B2235/3248 , C04B2235/3249 , C04B2235/3251 , C04B2235/3255 , C04B2235/3258 , C04B2235/326 , C04B2235/3262 , C04B2235/428 , C04B2235/442 , C04B2235/6025 , C04B2235/652 , C04B2235/6582 , C04B2235/6588 , C04B2235/768 , C04B2235/79 , C04B2235/96 , C04B2237/346 , C04B2237/348 , C04B2237/68 , C04B2237/704 , H01B3/12 , H01G4/012 , H01G4/1227 , H01G4/1245 , H01G4/232
Abstract: A multilayer ceramic capacitor that includes a ceramic laminated body having dielectric layers and internal electrodes at the interfaces between the dielectric layers, and external electrodes on the outer surface of the ceramic laminated body. The dielectric layers contain, as their main constituent, a perovskite-type compound including Ba, Ti, Zr, and M. M is at least one element of Ta, Nb, V, and W. The dielectric layers further contain Mn and Si as additive constituents. With respect to the total amount of Ti, Zr, and M, 40 mol %
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公开(公告)号：US09373445B2
公开(公告)日：2016-06-21
申请号：US14574796
申请日：2014-12-18
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Takafumi Okamoto
IPC: C04B35/00 , H01G4/12 , H01G4/30 , C04B35/468 , C04B35/626
CPC classification number: H01G4/1227 , C04B35/4682 , C04B35/6261 , C04B2235/3206 , C04B2235/3208 , C04B2235/3213 , C04B2235/3217 , C04B2235/3224 , C04B2235/3227 , C04B2235/3244 , C04B2235/3262 , C04B2235/6025 , C04B2235/6582 , C04B2235/6588 , H01G4/30 , Y10T29/435
Abstract: A multilayer ceramic capacitor includes a multilayer body including a plurality of stacked dielectric layers including a dielectric ceramic that includes a plurality of crystal grains and a plurality of internal electrodes disposed at a plurality of interfaces between the dielectric layers, and external electrodes. The multilayer body includes a Ba and Ti containing perovskite compound, La, Mg, Mn and Al, and satisfies conditions such that in a case in which a content of Ti is set to 100 molar parts, a fraction of each content of La, Mg, Mn and Al relative to the content of Ti is such that La is about 0.2 to about 1.2 molar parts, Mg is about 0.1 molar part or less, Mn is about 1.0 to about 3.0 molar parts and Al is about 0.5 to about 2.5 molar parts, and an average number of crystal grains included in each of the dielectric layers in the stacking direction is one or more to three or less.
Abstract translation: 一种多层陶瓷电容器包括：多层体，其包括多个堆叠的电介质层，包括包含多个晶粒的电介质陶瓷和设置在所述电介质层之间的多个界面处的多个内部电极和外部电极。 多层体包含含有Ba和Ti的钙钛矿化合物La，Mg，Mn和Al，并且满足条件使得在Ti含量为100摩尔份数的情况下，La，Mg ，Mn和Al相对于Ti的含量使得La为约0.2至约1.2摩尔份，Mg为约0.1摩尔份或更少，Mn为约1.0至约3.0摩尔份，Al约为约0.5至约2.5摩尔 在层叠方向的各电介质层中包含的平均晶粒数为1个以上3个以下。
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公开(公告)号：US10726994B2
公开(公告)日：2020-07-28
申请号：US16167665
申请日：2018-10-23
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Takafumi Okamoto
Abstract: A multilayer ceramic capacitor having a ceramic sintered body with alternately laminated dielectric layers and internal electrodes. The dielectric layers are formed from a perovskite-type compound represented by the general formula ABO3, and the perovskite-type compound contains at least Ti and a volatile element that forms a solid solution at a B site thereof. The internal electrodes are formed from a base metal material and contain the volatile element. The content of the volatile element is greater than 0 parts by mole and less than or equal to 0.2 parts by mole with respect to 100 parts by mole of the constituent element at the B site, and excluding the volatile element at the B site.
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10.发明申请公开(公告)号：US20180265413A1
公开(公告)日：2018-09-20
申请号：US15988405
申请日：2018-05-24
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Takafumi Okamoto
IPC: C04B35/468 , H01G4/12 , H01G4/30
CPC classification number: C04B35/4682 , C04B35/638 , C04B2235/3206 , C04B2235/3208 , C04B2235/3213 , C04B2235/3217 , C04B2235/3224 , C04B2235/3225 , C04B2235/3239 , C04B2235/3262 , C04B2235/3281 , C04B2235/3284 , C04B2235/3286 , C04B2235/3293 , C04B2235/3294 , C04B2235/3418 , C04B2235/652 , C04B2235/6584 , C04B2235/6588 , C04B2235/70 , H01G4/12 , H01G4/1227 , H01G4/30
Abstract: A dielectric porcelain composition having a main component a perovskite compound represented by ABO3, and the perovskite compound at least contains Ti and a volatile element which forms a solid solution at a B site, and may also contain Zr. The dielectric porcelain composition contains the volatile element in an amount larger than 0 part by mol and less than or equal to 0.2 part by mol with respect to 100 parts by mol of a total of the Ti and the Zr, and has a ratio of an A-site element to the total of the Ti and the Zr of 1.00 or more and 1.04 or less as a molar ratio.
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