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公开(公告)号:US07046502B2
公开(公告)日:2006-05-16
申请号:US11092730
申请日:2005-03-30
申请人: Takako Murosawa , Mari Miyauchi , Kazunori Noguchi , Akira Sato
发明人: Takako Murosawa , Mari Miyauchi , Kazunori Noguchi , Akira Sato
IPC分类号: H01G4/06
摘要: A multilayer ceramic capacitor having an internal electrode layer and a dielectric layer having a thickness of less than 2 μm is provided, wherein the dielectric layer contains a plurality of dielectric particles, and when it is assumed that standard deviation of a particle distribution of the entire dielectric particles in the dielectric layer is σ (no unit), an average particle diameter of the entire dielectric particles in the dielectric layer is D50 (unit: μm), and a rate that dielectric particles (coarse particles) having an average particle diameter of 2.25 times of the D50 exist in the entire dielectric particles is p (unit: %), the σ and p satisfy σ
摘要翻译: 提供了具有内部电极层和厚度小于2μm的电介质层的多层陶瓷电容器,其中介电层包含多个电介质颗粒,并且当假定整个电介质层的粒子分布的标准偏差 电介质层中的电介质粒子是σ(无单位),电介质层中的整个电介质粒子的平均粒径为D 50(单位:mum),并且具有平均粒径 在整个电介质颗粒中存在的D50的2.25倍是p(单位:%),σ和p满足σ<0.130和p <12%; 即使层间电介质层薄,也可以预期可以提高TC偏置特性,同时保持各种电特性,特别是足够的介电常数。
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公开(公告)号:US07006345B2
公开(公告)日:2006-02-28
申请号:US11030194
申请日:2005-01-07
申请人: Yukie Nakano , Mari Miyauchi , Akira Sato
发明人: Yukie Nakano , Mari Miyauchi , Akira Sato
CPC分类号: H01G4/30 , H01G4/1227 , Y10T29/435
摘要: The invention aims to provide a multilayer ceramic capacitor with high dielectric constant, a high capacitance, and an excellent reliability by eliminating oxygen vacancy in dielectric layers and suppressing oxidation of Ni inner electrodes. The multilayer ceramic capacitor comprises a multilayered dielectric body composed by alternately piling up dielectric layers containing mainly barium titanate and inner electrode layers containing mainly Ni and a first hetero-phase containing Mg—Si—O as constituent elements exists in the capacitor.
摘要翻译: 本发明旨在通过消除介电层中的氧空位和抑制Ni内电极的氧化来提供具有高介电常数,高电容性和优异可靠性的多层陶瓷电容器。 该多层陶瓷电容器包括多层电介质体,该层叠电介质体主要由主要包含钛酸钡的电介质层和主要含有Ni的内部电极层和含有Mg-Si-O的第一异质相作为构成元素交替堆积而构成。
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公开(公告)号:US20050254197A1
公开(公告)日:2005-11-17
申请号:US11092730
申请日:2005-03-30
申请人: Takako Murosawa , Mari Miyauchi , Kazunori Noguchi , Akira Sato
发明人: Takako Murosawa , Mari Miyauchi , Kazunori Noguchi , Akira Sato
摘要: A multilayer ceramic capacitor comprising an internal electrode layer and a dielectric layer having a thickness of less than 2 μm is provided, wherein the dielectric layer contains a plurality of dielectric particles, and when it is assumed that standard deviation of a particle distribution of the entire dielectric particles in the dielectric layer is σ (no unit), an average particle diameter of the entire dielectric particles in the dielectric layer is D50 (unit: μm), and a rate that dielectric particles (coarse particles) having an average particle diameter of 2.25 times of the D50 exist in the entire dielectric particles is p (unit: %), the σ and p satisfy σ
摘要翻译: 提供了包括内部电极层和厚度小于2μm的电介质层的多层陶瓷电容器,其中介电层包含多个电介质颗粒,并且当假定整个电极的颗粒分布的标准偏差 电介质层中的电介质粒子是σ(无单位),电介质层中的整个电介质粒子的平均粒径为D 50(单位:mum),并且具有平均粒径 在整个电介质颗粒中存在的D50的2.25倍是p(单位:%),σ和p满足σ<0.130和p <12%; 即使层间电介质层薄,也可以预期可以提高TC偏置特性,同时保持各种电特性,特别是足够的介电常数。
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公开(公告)号:US06785121B2
公开(公告)日:2004-08-31
申请号:US09865575
申请日:2001-05-29
申请人: Yukie Nakano , Shunichi Yuri , Mari Miyauchi , Daisuke Iwanaga
发明人: Yukie Nakano , Shunichi Yuri , Mari Miyauchi , Daisuke Iwanaga
IPC分类号: H01G406
CPC分类号: H01G4/12 , H01G4/232 , H01G4/30 , Y10T29/417
摘要: A multilayer ceramic capacitor having internal electrode layers and dielectric layers with dielectric particles is disclosed. An average particle diameter of the dielectric particles, when measured parallel with the direction of the internal electrode layers, is larger than a thickness of the dielectric layer. A ratio (R/d) between the average particle diameter (R) and the thickness (d) of the dielectric layer is 1
摘要翻译: 公开了一种具有内部电极层和具有介电颗粒的电介质层的多层陶瓷电容器。 当与内部电极层的方向平行地测量时,电介质颗粒的平均粒径大于介电层的厚度。 介电层的平均粒径(R)和厚度(d)之比(R / d)为1
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公开(公告)号:US20090149312A1
公开(公告)日:2009-06-11
申请号:US12314144
申请日:2008-12-04
申请人: Sanshiro Aman , Mari Miyauchi , Hideaki Seki
发明人: Sanshiro Aman , Mari Miyauchi , Hideaki Seki
IPC分类号: C04B35/468
CPC分类号: C04B35/49 , C04B35/4682 , C04B35/62685 , C04B35/638 , C04B2235/3203 , C04B2235/3206 , C04B2235/3217 , C04B2235/3224 , C04B2235/3225 , C04B2235/3227 , C04B2235/3229 , C04B2235/3236 , C04B2235/3241 , C04B2235/3248 , C04B2235/3262 , C04B2235/3272 , C04B2235/3277 , C04B2235/3287 , C04B2235/3409 , C04B2235/3418 , C04B2235/5445 , C04B2235/656 , C04B2235/6562 , C04B2235/6565 , C04B2235/6567 , C04B2235/6582 , C04B2235/6584 , C04B2235/6588 , C04B2235/663 , C04B2235/785 , C04B2235/79 , C04B2235/85 , H01G4/1227 , H01G4/30
摘要: A dielectric ceramic composition of the present invention comprises; BamTiO2+m (note that, m is 0.99≦m≦1.01), and BanZrO2+n (note that, n is 0.99≦n≦1.01); wherein said dielectric ceramic composition consists of plurality of dielectric particles and a grain boundary phase existing between said dielectric particles adjacent to each other, when said dielectric particle having BamTiO2+m as a main component is set to a first dielectric particle, said dielectric particle having BanZrO2+n as a main component is set to a second dielectric particle, an average crystal diameter of said first dielectric particle is set to D1 (μm), and an average crystal diameter of said second dielectric particle is set to D2 (μm), then a ratio (D2/D1) of said D2 with respect to said D1 is 0.04 to 0.33, said D2 is 0.02 to 0.25 μm, and in said dielectric ceramic composition a ratio of the total number of said second dielectric particle with respect to the total number of said first dielectric particle is 0.10 to 2. The present invention is to provide the dielectric ceramic composition suitable for the medium-high voltage application used at a high rated voltage (for example, 100V or more).
摘要翻译: 本发明的电介质陶瓷组合物包括: BamTiO2 + m(注意,m为0.99 <= m <= 1.01)和BanZrO2 + n(注意,n为0.99 <= n <= 1.01)。 其中所述电介质陶瓷组合物由多个电介质颗粒和存在于所述相互邻近的所述电介质颗粒之间的晶界相组成,当所述具有BamTiO 2 + m作为主要成分的电介质颗粒被设置为第一电介质颗粒时,所述电介质颗粒具有 将BanZrO2 + n作为主要成分设置在第二电介质粒子上,将所述第一电介质粒子的平均晶体直径设定为D1(母体),将所述第二电介质粒子的平均晶体直径设定为D2(μm) 那么所述D2相对于所述D1的比率(D2 / D1)为0.04至0.33,所述D2为0.02至0.25微米,并且在所述介电陶瓷组合物中,所述第二电介质颗粒的总数相对于 所述第一电介质颗粒的总数为0.10〜2。本发明提供适用于在高额定电压下使用的中高压应用的电介质陶瓷组合物( 例如100V以上)。
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公开(公告)号:US20080297979A1
公开(公告)日:2008-12-04
申请号:US12071470
申请日:2008-02-21
申请人: Sanshiro Aman , Takashi Kojima , Mari Miyauchi , Masakazu Hosono , Dan Sakurai , Kosuke Takano , Nobuto Morigasaki
发明人: Sanshiro Aman , Takashi Kojima , Mari Miyauchi , Masakazu Hosono , Dan Sakurai , Kosuke Takano , Nobuto Morigasaki
CPC分类号: H01G4/1227 , C04B35/49 , C04B35/62685 , C04B35/638 , C04B2235/3203 , C04B2235/3206 , C04B2235/3215 , C04B2235/3217 , C04B2235/3224 , C04B2235/3225 , C04B2235/3227 , C04B2235/3229 , C04B2235/3236 , C04B2235/3241 , C04B2235/3248 , C04B2235/3262 , C04B2235/3272 , C04B2235/3277 , C04B2235/3279 , C04B2235/3287 , C04B2235/3409 , C04B2235/3418 , C04B2235/5445 , C04B2235/6025 , C04B2235/6562 , C04B2235/6565 , C04B2235/6567 , C04B2235/6582 , C04B2235/6584 , C04B2235/6588 , C04B2235/663 , C04B2235/768 , C04B2235/79 , H01G4/30
摘要: A dielectric ceramic composition comprising BamTiO2+m (note that “m” satisfies 0.99≦m≦1.01) and BanZrO2+n (note that “n” satisfies 0.99≦n≦1.01), an oxide of Mg, an oxide of R (note that R is at least one selected from Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu), an oxide of at least one element selected from Mn, Cr, Co and Fe, and an oxide of at least one element selected from Si, Li, Al, Ge and B. With respect to 100 moles of said BamTiO2+m, 35 to 65 moles of BanZrO2+n, 4 to 12 moles of an oxide of Mg, 4 to 15 moles of an oxide of R, 0.5 to 3 moles of an oxide of Mn, Cr, Co and Fe, and 3 to 9 moles of an oxide of Si, Li, Al, Ge and B are included therein.
摘要翻译: 包含BamTiO 2 + m(注意“m”满足0.99 <= m <= 1.01)和BanZrO2 + n(注意“n”满足0.99 <= n <= 1.01)的介电陶瓷组合物,Mg的氧化物,氧化物 的R(注意,R为选自Sc,Y,La,Ce,Pr,Nd,Pm,Sm,Eu,Gd,Tb,Dy,Ho,Er,Tm,Yb和Lu中的至少一种) 选自Mn,Cr,Co和Fe中的至少一种元素,以及选自Si,Li,Al,Ge和B中的至少一种元素的氧化物。对于100摩尔所述BamTiO 2 + m,35至65摩尔 BanZrO 2 + n,4〜12摩尔Mg的氧化物,4〜15摩尔的R的氧化物,0.5〜3摩尔的Mn,Cr,Co和Fe的氧化物,以及3〜9摩尔的Si的氧化物 ,Li,Al,Ge和B。
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公开(公告)号:US20080226944A1
公开(公告)日:2008-09-18
申请号:US12071465
申请日:2008-02-21
申请人: Sanshiro Aman , Takashi Kojima , Mari Miyauchi , Masakazu Hosono , Dan Sakurai , Kosuke Takano , Nobuto Morigasaki
发明人: Sanshiro Aman , Takashi Kojima , Mari Miyauchi , Masakazu Hosono , Dan Sakurai , Kosuke Takano , Nobuto Morigasaki
IPC分类号: B32B18/00 , C04B35/468
CPC分类号: H01G4/1227 , C04B35/4682 , C04B35/6262 , C04B35/62645 , C04B2235/3203 , C04B2235/3206 , C04B2235/3215 , C04B2235/3217 , C04B2235/3224 , C04B2235/3225 , C04B2235/3227 , C04B2235/3229 , C04B2235/3236 , C04B2235/3241 , C04B2235/3244 , C04B2235/3248 , C04B2235/3262 , C04B2235/3272 , C04B2235/3275 , C04B2235/3287 , C04B2235/3409 , C04B2235/3418 , C04B2235/5436 , C04B2235/5445 , C04B2235/79 , H01G4/30
摘要: A dielectric ceramic composition comprises a main component including BaTiO3, a first subcomponent including BaZrO3, a second subcomponent including an oxide of Mg, a third subcomponent including an oxide of rare earth, a fourth subcomponent including an oxide of at least one element selected from Mn, Cr, Co and Fe, and a fifth subcomponent including an oxide of at least one element selected from Si, Al, Ge, B and Li. At least a part of dielectric particles constituting the dielectric ceramic composition comprises a surface diffusion structure comprised of a central layer and a diffusion layer therearound. CR and CRmax, respectively defined as a concentration of said “R” in a proximity point to a boundary face of the dielectric particle and a maximum concentration of the “R” in the diffusion layer, satisfy a relation of CRmax/CR>1. Also, CM and CMmax, respectively defined as a concentration of said Mg in a proximity point to a boundary face of the dielectric particle and a maximum concentration of Mg in the diffusion layer, satisfy a relation of CMmax/CM>1.
摘要翻译: 电介质陶瓷组合物包括主要组分,包括BaTiO 3 N 3,第一副成分,包括BaZrO 3 3,第二次要组分,包括Mg的氧化物,第三副成分,包括稀有氧化物 包括选自Mn,Cr,Co和Fe中的至少一种元素的氧化物的第四副成分,以及包含选自Si,Al,Ge,B和Li中的至少一种元素的氧化物的第五副成分。 构成电介质陶瓷组合物的介电颗粒的至少一部分包括由其周围的中心层和扩散层组成的表面扩散结构。 分别定义为在电介质颗粒的界面的接近点处的所述“R”的浓度和扩散层中的“R”的最大浓度的CR和CRmax满足CRmax / CR> 1的关系。 此外,CM和CMmax分别定义为在介电粒子的接近点附近的Mg的浓度和扩散层中的Mg的最大浓度,满足CMmax / CM> 1的关系。
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公开(公告)号:US07158364B2
公开(公告)日:2007-01-02
申请号:US11067715
申请日:2005-03-01
申请人: Mari Miyauchi , Akira Sato , Kaori Shiozawa
发明人: Mari Miyauchi , Akira Sato , Kaori Shiozawa
摘要: The present invention relates to a multilayer ceramic capacitor comprising: an element main body in which a dielectric layer and an inner electrode layer are alternately laminated, the inner electrode layer comprises: a composite structure having an inner electrode main layer of a base metal; and ceramic particles buried in the inner electrode main layer, therefore the inner electrode layer can be prevented from being interrupted by spheroidizing during the forming of the inner electrode layer, that is, drop of an electrode effective area can be inhibited, and high electrostatic capacity is obtained.
摘要翻译: 本发明涉及一种层叠陶瓷电容器,其包括:电介质层和内电极层交替层叠的元件主体,所述内电极层包括:具有贱金属内电极主层的复合结构体; 并且埋入内部电极主层中的陶瓷颗粒,因此可以防止内部电极层在形成内部电极层期间被球化中断,即可以抑制电极有效面积的下降,并且高静电容量 获得。
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公开(公告)号:US07072170B2
公开(公告)日:2006-07-04
申请号:US10996424
申请日:2004-11-26
申请人: Mari Miyauchi , Kazunori Noguchi , Takako Hibi , Akira Sato
发明人: Mari Miyauchi , Kazunori Noguchi , Takako Hibi , Akira Sato
IPC分类号: H01G4/06
CPC分类号: H01G4/12
摘要: There is provided a multilayer ceramic capacitor 1, having an internal electrode layer 3 and an interlayer dielectric layer 2 having a thickness of 3.5 μm or less, wherein the interlayer dielectric layer 2 is composed of contact dielectric particles 2a contacting said internal electrode layer and noncontact dielectric particles 2b not contacting said internal electrode layer; and when assuming that an average particle diameter of the contact dielectric particles 2a is D50e and an average particle diameter of the noncontact dielectric particles 2b is D50d, D50e
摘要翻译: 提供了具有内部电极层3和厚度为3.5μm以下的层间电介质层2的多层陶瓷电容器1,其中层间电介质层2由与内部电极层接触的接触电介质粒子2a和 非接触电介质颗粒2b不接触所述内部电极层; 并且当假定接触电介质粒子2a的平均粒径为D50e,非接触电介质粒子2b的平均粒径为D50d时,D50e <0.450μm,(D50e / D50d)= 1.20〜3.00(注意,1.20 和3.00),其中即使当层间绝缘层2变薄时,也可以预期在85℃下的偏置特性的改善。
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公开(公告)号:US20050219795A1
公开(公告)日:2005-10-06
申请号:US11094604
申请日:2005-03-31
申请人: Takako Murosawa , Mari Miyauchi , Kazunori Noguchi , Akira Sato
发明人: Takako Murosawa , Mari Miyauchi , Kazunori Noguchi , Akira Sato
摘要: A multilayer ceramic capacitor comprising an internal electrode layer, an internal dielectric layer having a thickness of less than 2 μm, and an external dielectric layer is provided, wherein the internal dielectric layer and external dielectric layer contain a plurality of dielectric particles, and when assuming that an average particle diameter of the entire dielectric particles in the internal dielectric layer is D50a (unit: μm), an average particle diameter of the entire dielectric particles existing at a position being away at least by 5 μm from the outermost internal electrode layer in the thickness direction is D50b (unit: μm), a ratio (D50a/D50b) of the D50a and D50b is y (no unit), standard deviation of a particle size distribution of the entire dielectric particles in the internal dielectric layer is σ (no unit), and a ratio that dielectric particles (coarse particles) having an average particle diameter of 2.25 times of the D50a exist in the entire dielectric particles is p (unit: %), the y and x satisfy a relationship of y −0.75x+1.740, the σ satisfies σ
摘要翻译: 提供了包括内部电极层,厚度小于2μm的内部电介质层和外部电介质层的多层陶瓷电容器,其中内部电介质层和外部电介质层包含多个电介质颗粒,并且当假定 内部电介质层中的整个电介质颗粒的平均粒径为D50a(单位:mum),存在于距离最外部内部电极层至少离开5μm的位置的整个电介质粒子的平均粒径 厚度方向为D50b(单位:mum),D50a和D50b的比率(D50a / D50b)为y(无单位),内部电介质层中的整个电介质粒子的粒度分布的标准偏差为σ( 无单位),并且在整个电介质粒子中存在平均粒径为D25a的2.25倍的电介质粒子(粗粒子)的比例 es是p(单位:%),y和x满足y <-0.75x + 2.015和y> -0.75x + 1.740的关系,σ满足σ<0.091,p满足p <2.85%。 即使当内部电介质层变薄时,也可以期望改善TC偏压特性,同时保持各种电特性,特别是足够的介电常数。
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