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公开(公告)号：US20220130608A1
公开(公告)日：2022-04-28
申请号：US17496044
申请日：2021-10-07
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Taku Mizuno , Keisuke Araki , Hiroyuki Wada
IPC: H01G4/12 , H01G4/30 , C04B35/468
Abstract: A dielectric ceramic that includes multiple crystal grains, each of the multiple crystal grains having an interface, a barium titanate (BaTiO3)-based compound as a main component thereof, and a rare earth element. The dielectric ceramic has a cross-section in which the multiple crystal grains has a concentration varying region, a high concentration region, and a low concentration region. The concentration varying region has an RE/Ti ratio differing by 3% or more. The high concentration region has an RE/Ti ratio of 5% to 20%. The low concentration region has an RE/Ti ratio of 0% to 2%.
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公开(公告)号：US09928960B2
公开(公告)日：2018-03-27
申请号：US14744123
申请日：2015-06-19
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Toru Nakanishi , Toshihiro Okamatsu , Akihiro Tsuru , Hiroyuki Wada
CPC classification number: H01G4/30 , C04B35/4682 , C04B2235/3206 , C04B2235/3224 , C04B2235/3225 , C04B2235/3244 , C04B2235/3262 , C04B2235/3418 , C04B2235/79 , H01G4/0085 , H01G4/01 , H01G4/1227 , H01G4/1245 , H01G4/224
Abstract: A monolithic ceramic capacitor that contains a perovskite compound including Ba and Ti and at least one type of element selected from Gd, Tb, and Dy, and contains elements selected from Y, Si, Mn, Mg, and Zr. The content a of at least one element selected from Gd, Tb, and Dy satisfies 0.2≤a≤0.8, the content b of Y satisfies 0.0≤b≤0.5, the content c of Si satisfies 0.0≤c≤2.5, the content d of Mn satisfies 0.0≤d≤0.25, the content e of Mg satisfies 0.0≤e≤1.2, the content f of Zr satisfies 0.0≤f≤0.5, and the molar ratio m of the content of Ba/(f+the content of Ti) satisfies 0.99≤m≤1.01, where the total content of Ti is 100 parts by mole.
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Patent Agency Ranking
公开(公告)号：US09589729B2
公开(公告)日：2017-03-07
申请号：US14855571
申请日：2015-09-16
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Hiroyuki Wada , Kohei Shimada , Kenji Takagi , Tomomi Koga , Tomotaka Hirata , Hitoshi Nishimura , Hiroki Awata , Sui Uno
IPC: H01G4/30 , H01G2/24 , H01G4/12 , H01G4/224 , H01G4/012 , H01G4/242 , H05K1/18 , H05K3/30 , H01G4/232
CPC classification number: H01G4/30 , H01G2/24 , H01G4/012 , H01G4/12 , H01G4/1209 , H01G4/1227 , H01G4/1236 , H01G4/1245 , H01G4/224 , H01G4/232 , H01G4/242 , H01G4/248 , H05K1/181 , H05K3/30 , H05K2201/10015
Abstract: A multilayer ceramic capacitor includes a laminated body including an inner layer portion including ceramic dielectric layers and internal electrodes, and outer layer portions including ceramic dielectric layers. External electrodes connected to the internal electrodes are provided on both ends of the laminated body. The main constituent of the inner layer portion is a perovskite-type compound represented by ABO3. The outer layer portions include first outer layers and second outer layers respectively containing oxides that differ from each other in main constituents, and boundary reaction layers are provided between the first outer layers and the second outer layers. First ceramic dielectric layers outside the boundary reaction layers differ in color from second ceramic dielectric layers inside the boundary reaction layers.
Abstract translation: 多层陶瓷电容器包括层叠体，其包括包含陶瓷电介质层和内部电极的内层部分和包括陶瓷电介质层的外层部分。 连接到内部电极的外部电极设置在层叠体的两端。 内层部分的主要成分是由ABO 3表示的钙钛矿型化合物。 外层部分包括分别包含在主要成分中彼此不同的氧化物的第一外层和第二外层，并且边界反应层设置在第一外层和第二外层之间。 边界反应层之外的第一陶瓷电介质层的颜色与边界反应层内部的第二陶瓷介电层的颜色不同。
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公开(公告)号：US09466426B2
公开(公告)日：2016-10-11
申请号：US13777679
申请日：2013-02-26
Applicant: MURATA MANUFACTURING CO., LTD.
Inventor： Kohei Shimada , Hiroyuki Wada , Keisuke Araki , Hiroyuki Yoshioka , Masato Ishibashi
IPC: H01G4/06 , C04B35/00 , H01G4/12 , H01G4/005 , H01G4/30 , B32B18/00 , C04B35/468 , C04B35/626
CPC classification number: H01G4/1209 , B32B18/00 , C04B35/4682 , C04B35/62685 , C04B2235/3206 , C04B2235/3208 , C04B2235/3213 , C04B2235/3215 , C04B2235/3217 , C04B2235/3224 , C04B2235/3225 , C04B2235/3227 , C04B2235/3229 , C04B2235/3232 , C04B2235/3239 , C04B2235/3241 , C04B2235/3244 , C04B2235/3256 , C04B2235/3258 , C04B2235/3262 , C04B2235/3272 , C04B2235/3275 , C04B2235/3279 , C04B2235/3418 , C04B2235/442 , C04B2235/5409 , C04B2235/5445 , C04B2235/6025 , C04B2235/6584 , C04B2235/79 , C04B2237/346 , C04B2237/588 , H01G4/005 , H01G4/12 , H01G4/1218 , H01G4/1227 , H01G4/1236 , H01G4/30
Abstract: Provided is a laminated ceramic capacitor which can suppress degradation of the insulation resistance due to the addition of vanadium. Second insulating layers are stacked on both sides in the stacking direction of a first insulating layer group, which has first insulating layers stacked over one another, and internal electrodes are placed on principal surfaces of the first insulating layers. At least one internal electrode is placed between the first and second insulating layers. Both contain, as their main constituent, a perovskite-type compound represented by the formula “ABO3” wherein “A” denotes at least one of Ba, Sr, and Ca, “B” denotes at least one of Ti, Zr, and Hf. V is added to only the first insulating layers.
Abstract translation: 提供一种层压陶瓷电容器，其可以抑制由于添加钒而引起的绝缘电阻的劣化。 第二绝缘层在第一绝缘层组的堆叠方向的两侧堆叠，第一绝缘层组具有彼此堆叠的第一绝缘层，并且内部电极放置在第一绝缘层的主表面上。 至少一个内部电极被放置在第一和第二绝缘层之间。 两者都含有由“ABO3”表示的钙钛矿型化合物作为其主要成分，其中“A”表示Ba，Sr和Ca中的至少一种，“B”表示Ti，Zr和Hf中的至少一种 。 V仅添加到第一绝缘层。
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公开(公告)号：US09042082B2
公开(公告)日：2015-05-26
申请号：US14528996
申请日：2014-10-30
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Hiroyuki Wada , Kohei Shimada , Kenji Takagi , Tomomi Koga , Tomotaka Hirata , Hitoshi Nishimura , Hiroki Awata , Sui Uno
CPC classification number: H01G4/30 , H01G4/012 , H01G4/12 , H01G4/1209 , H01G4/1227 , H01G4/1245 , H01G4/224 , H01G4/248
Abstract: A multilayer ceramic capacitor includes a ceramic main body including an inner layer portion including third ceramic layers and a plurality of inner electrodes arranged at interfaces between the third ceramic layers, and first and second outer layer portions respectively including first and second ceramic layers, the first and second ceramic layers being arranged vertically so as to sandwich the inner layer portion. The third ceramic layers and the first and second outer layer portions contain a perovskite-type compound represented by ABO3 where A contains one or more of Ba, Sr, and Ca, B contains one or more of Ti, Zr, and Hf, and O represents oxygen) as a main component. Where a rare-earth element concentration (CR) in the third ceramic layers is compared to a rare-earth element concentration (Cr) in outermost layer portions including at least outermost surfaces of the first and second outer layer portions, CR>Cr (inclusive of Cr=0).
Abstract translation: 多层陶瓷电容器包括陶瓷主体，其包括内层部分，其包括第三陶瓷层和布置在第三陶瓷层之间的界面处的多个内电极以及分别包括第一和第二陶瓷层的第一和第二外层部分， 并且第二陶瓷层垂直布置以夹住内层部分。 第三陶瓷层和第一外层和第二外层部分含有由ABO 3表示的钙钛矿型化合物，其中A含有Ba，Sr和Ca中的一种或多种，B包含Ti，Zr和Hf中的一种或多种，O 代表氧）作为主要成分。 在将第三陶瓷层中的稀土元素浓度（CR）与至少包含第一和第二外层部分的最外表面的最外层部分中的稀土元素浓度（Cr）进行比较时，CR> Cr（包括 的Cr = 0）。
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公开(公告)号：US20130222973A1
公开(公告)日：2013-08-29
申请号：US13858989
申请日：2013-04-09
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Hiroyuki Wada , Yosuke Hirata , Takashi Hiramatsu , Yoshito Saito , Hideaki Tsuji , Hiroyuki Ukai
CPC classification number: H01G4/30 , H01G4/005 , H01G4/12 , H01G4/1218
Abstract: A laminated ceramic capacitor including a laminated body having a plurality of stacked ceramic layers and internal electrodes located between the ceramic layers. The internal electrodes have a plurality of ceramic columnar members formed therein, which project into the internal electrodes from interfaces between the ceramic layers and the internal electrodes, but do not penetrate in the thickness direction of the internal electrodes.
Abstract translation: 一种层叠陶瓷电容器，包括具有多个层叠陶瓷层和位于陶瓷层之间的内部电极的层叠体。 内部电极具有形成在其中的多个陶瓷柱状构件，其从陶瓷层和内部电极之间的界面突出到内部电极中，但不会在内部电极的厚度方向上穿透。
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公开(公告)号：US20130163144A1
公开(公告)日：2013-06-27
申请号：US13777679
申请日：2013-02-26
Applicant: MURATA MANUFACTURING CO., LTD.
Inventor： Kohei Shimada , Hiroyuki Wada , Keisuke Araki , Hiroyuki Yoshioka , Masato Ishibashi
IPC: H01G9/12
CPC classification number: H01G4/1209 , B32B18/00 , C04B35/4682 , C04B35/62685 , C04B2235/3206 , C04B2235/3208 , C04B2235/3213 , C04B2235/3215 , C04B2235/3217 , C04B2235/3224 , C04B2235/3225 , C04B2235/3227 , C04B2235/3229 , C04B2235/3232 , C04B2235/3239 , C04B2235/3241 , C04B2235/3244 , C04B2235/3256 , C04B2235/3258 , C04B2235/3262 , C04B2235/3272 , C04B2235/3275 , C04B2235/3279 , C04B2235/3418 , C04B2235/442 , C04B2235/5409 , C04B2235/5445 , C04B2235/6025 , C04B2235/6584 , C04B2235/79 , C04B2237/346 , C04B2237/588 , H01G4/005 , H01G4/12 , H01G4/1218 , H01G4/1227 , H01G4/1236 , H01G4/30
Abstract: Provided is a laminated ceramic capacitor which can suppress degradation of the insulation resistance due to the addition of vanadium. Second insulating layers are stacked on both sides in the stacking direction of a first insulating layer group, which has first insulating layers stacked over one another, and internal electrodes are placed on principal surfaces of the first insulating layers. At least one internal electrode is placed between the first and second insulating layers. Both contain, as their main constituent, a perovskite-type compound represented by the formula “ABO3” wherein “A” denotes at least one of Ba, Sr, and Ca, “B” denotes at least one of Ti, Zr, and Hf. V is added to only the first insulating layers.
Abstract translation: 提供一种层压陶瓷电容器，其可以抑制由于添加钒而引起的绝缘电阻的劣化。 第二绝缘层在第一绝缘层组的堆叠方向的两侧堆叠，第一绝缘层组具有彼此堆叠的第一绝缘层，并且内部电极放置在第一绝缘层的主表面上。 至少一个内部电极被放置在第一和第二绝缘层之间。 两者都含有由“ABO3”表示的钙钛矿型化合物作为其主要成分，其中“A”表示Ba，Sr和Ca中的至少一种，“B”表示Ti，Zr和Hf中的至少一种 。 V仅添加到第一绝缘层。
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