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1.发明授权公开(公告)号：US10726992B2
公开(公告)日：2020-07-28
申请号：US16589884
申请日：2019-10-01
Applicant: TDK Corporation
Inventor： Shogo Murosawa , Toshihiko Kaneko
Abstract: A multilayer ceramic electronic device comprising: a ceramic element body, in which a plurality of dielectric layers and a plurality of internal electrode layers are alternately stacked, and at least a pair of external electrodes which are connected to the internal electrode layers on surfaces of the ceramic element body; a thickness of the dielectric layers is 0.4 μm or less, a width (W0) of the ceramic element body along a width-direction is 0.59 mm or less, a gap (Wgap) between an outer face of the ceramic element body and an end of the internal electrode layers along width-direction of the ceramic element body is 0.010 to 0.025 mm, and a ratio (Wgap/W0) of the gap with respect to the width is 0.025 or more.
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公开(公告)号：US09481606B2
公开(公告)日：2016-11-01
申请号：US14529623
申请日：2014-10-31
Applicant: TDK CORPORATION
Inventor： Saori Takeda , Toshihiko Kaneko , Yuki Yamashita , Yuji Sezai
CPC classification number: C04B35/453 , C04B35/16 , C04B2235/3298 , C04B2235/3427 , C04B2235/604 , C04B2235/6567 , C04B2235/80 , H01G4/085 , H01G4/1209 , H01G4/1272 , H01G4/33 , H01L28/55
Abstract: A dielectric composition containing a crystalline phase represented by a general formula of Bi12SiO20 and a crystalline phase represented by a general formula of Bi2SiO5 as the main components. The dielectric composition contains preferably 5 mass % to 99 mass % of the Bi2SiO5 crystalline phase, and more preferably 30 mass % to 99 mass %.
Abstract translation: 含有由通式Bi 12 SiO 20表示的结晶相和由通式Bi 2 SiO 5表示的结晶相作为主要成分的电介质组合物。 电介质组合物优选含有5质量％〜99质量％的Bi 2 SiO 5结晶相，更优选含有30质量％〜99质量％。
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公开(公告)号：US11955283B2
公开(公告)日：2024-04-09
申请号：US17195366
申请日：2021-03-08
Applicant: TDK CORPORATION
Inventor： Taku Murakami , Nobuto Morigasaki , Dan Sakurai , Takuma Ariizumi , Toshihiko Kaneko
IPC: H01G4/12 , C04B35/468 , H01G4/30
CPC classification number: H01G4/1227 , C04B35/4682 , H01G4/30 , C04B2235/3206 , C04B2235/3224 , C04B2235/3236 , C04B2235/3239 , C04B2235/3262 , C04B2235/3418 , C04B2235/442
Abstract: A dielectric ceramic composition includes a barium titanate, an oxide of an R element, an oxide of an M element, and an oxide containing Si. The R element is one or more elements selected from Eu, Gd, Tb, Dy, Y, Ho, and Yb. The M element is one or more elements selected from Mg, Ca, Mn, V, and Cr. A ratio of an amount of the oxide of the R element in terms of R2O3 to an amount of the oxide containing Si in terms of SiO2 is 0.8:1 to 2.2:1. A ratio of an amount of the oxide of the M element in terms of MO to the amount of the oxide containing Si in terms of SiO2 is 0.2:1 to 1.8:1.50% or more of the number of dielectric particles constituting the dielectric ceramic composition is core-shell dielectric particles having a core-shell structure.
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公开(公告)号：US11114247B2
公开(公告)日：2021-09-07
申请号：US16250911
申请日：2019-01-17
Applicant: TDK CORPORATION
Inventor： Dan Sakurai , Toshihiko Kaneko , Nobuto Morigasaki , Toshinari Takahashi , Yasuhiro Ito
Abstract: The object of the present invention is to provide the multilayer ceramic capacitor having no deterioration of dielectric properties even in case an inhibitor of an internal electrode layer is pushed out to a dielectric layer when sintering. The multilayer ceramic capacitor 1 including a capacitor element body 10 comprising a dielectric layer 2 and an internal electrode layer 3 stacked in an alternating manner, wherein when Za represents Zr concentration of an dielectric particle in a center part 6 of the dielectric layer 2 and Zb represents Zr concentration of a dielectric particle near the internal electrode layer, 0
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5.发明授权
公开(公告)号：US10325721B2
公开(公告)日：2019-06-18
申请号：US15082814
申请日：2016-03-28
Applicant: TDK Corporation
Inventor： Shogo Murosawa , Toshihiko Kaneko
Abstract: A multilayer ceramic electronic device comprising: a ceramic element body, in which a plurality of dielectric layers and a plurality of internal electrode layers are alternately stacked, and at least a pair of external electrodes which are connected to the internal electrode layers on surfaces of the ceramic element body; a thickness of the dielectric layers is 0.4 μm or less, a width (W0) of the ceramic element body along a width-direction is 0.59 mm or less, a gap (Wgap) between an outer face of the ceramic element body and an end of the internal electrode layers along width-direction of the ceramic element body is 0.010 to 0.025 mm, and a ratio (Wgap/W0) of the gap with respect to the width is 0.025 or more.
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公开(公告)号：US09666372B2
公开(公告)日：2017-05-30
申请号：US15064431
申请日：2016-03-08
Applicant: TDK CORPORATION
Inventor： Toshihiko Kaneko , Tatsuya Fujino , Nobuto Morigasaki , Yasuhiro Ito
IPC: C04B35/468 , H01G4/12 , H01G4/30 , C04B35/488 , C04B35/49
CPC classification number: H01G4/1227 , C04B35/4682 , C04B35/488 , C04B35/49 , C04B2235/3206 , C04B2235/3208 , C04B2235/3213 , C04B2235/3215 , C04B2235/3224 , C04B2235/3225 , C04B2235/3236 , C04B2235/3239 , C04B2235/3249 , C04B2235/3262 , C04B2235/3418 , C04B2235/5454 , C04B2235/6025 , C04B2235/6562 , C04B2235/6565 , C04B2235/6567 , C04B2235/6584 , C04B2235/6588 , C04B2235/768 , C04B2235/79 , C04B2235/80 , C04B2237/346 , C04B2237/68 , H01G4/30
Abstract: A dielectric ceramic composition including a main component having a perovskite crystal structure expressed by general formula ABO3, a first sub-component of an oxide of a rare earth element, and a second sub-component of an oxide of Si, and at least dielectric particles having a core-shell structure and segregated particles, in which a concentration of the rare earth element in the segregated particles is two or more times an average concentration of the rare earth element in a shell portion of the dielectric particles having the core-shell structure, and an area of the region occupied by the segregated particles is 5.0% or less and an average of cross-sectional areas of the respective segregated particles is 0.075 μm2 or less in a cross-section obtained by cutting the dielectric ceramic composition.
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公开(公告)号：US09382163B2
公开(公告)日：2016-07-05
申请号：US14310212
申请日：2014-06-20
Applicant: TDK CORPORATION
Inventor： Toshihiko Kaneko , Saori Takeda , Yuki Yamashita , Junichi Yamazaki
CPC classification number: C04B35/49 , C04B2235/3208 , C04B2235/3213 , C04B2235/3215 , C04B2235/6562 , H01L28/40
Abstract: The present invention aims to provide an amorphous dielectric film and an electronic component in which the relative permittivity and the temperature coefficient of electrostatic capacitance can be maintained and the withstand voltage can be increased even if the dielectric film is further thinned. The amorphous dielectric film of the present invention is characterized in that it is a dielectric film composed of an amorphous composition with A-B—O as the main component, wherein A contains at least two elements selected from the group consisting of Ba, Ca and Sr, and B contains Zr. When the main component of the dielectric film is represented by (BaxCaySrz)α—B—O, x, y and z meet the conditions of 0≦x≦1, 0≦y≦1, 0≦z≦1, respectively, x+y+z=1 and at least any two of x, y and z are 0.1 or more. When A/B is represented by α, 0.5≦α≦1.5.
Abstract translation: 本发明的目的在于提供一种非晶介质膜和电子元件，其中可以保持相对介电常数和静电电容的温度系数，并且即使电介质膜进一步薄化也可以提高耐电压。 本发明的非晶质介电体膜的特征在于，由作为主成分的无定形组合物构成的电介质膜，其中，A含有选自Ba，Ca，Sr中的至少2种以上的元素， B含有Zr。 当电介质膜的主要成分由（BaxCaySrz）α-B-O表示时，x，y和z分别满足0＆nlE; x＆nlE; 1,0，nlE; y＆nlE; 1,0和nlE; z＆nlE; 1的条件x + y + z = 1，x，y和z中的至少任意两个为0.1以上。 当A / B由α表示时，0.5＆nlE;α＆nlE; 1.5。
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公开(公告)号：US11894188B2
公开(公告)日：2024-02-06
申请号：US17739482
申请日：2022-05-09
Applicant: TDK CORPORATION
Inventor： Takuya Imaeda , Takashi Morita , Masashi Hatanaka , Toshihiko Kaneko
Abstract: An element body of a multilayer capacitor has a plurality of first electrodes and a plurality of second electrodes. At least one of the first electrodes is curved such that a first main body portion is located on an outer side of a first extending portion in a first direction, and at least one of the second electrodes is curved such that a second main body portion is located on an outer side of a second extending portion in the first direction. The following expressions (1) to (6) are satisfied for lengths L0 to L4 in a second direction and distances TL1 to TL3 between main surfaces.
0.03≤L1/L0≤0.1 (1)
0.1≤L2/L0≤0.25 (2)
0.75≤L3/L0≤0.9 (3)
0.9≤L4/L0≤0.97 (4)
0≤(TL1−TL2)/TL1≤0.02 (5)
0≤(TL1−TL3)/TL1≤0.02 (6)
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公开(公告)号：US11842851B2
公开(公告)日：2023-12-12
申请号：US17589206
申请日：2022-01-31
Applicant: TDK CORPORATION
Inventor： Takuma Ariizumi , Taku Murakami , Nobuto Morigasaki , Toshihiko Kaneko , Yasuhiro Ito
IPC: H01G4/12 , H01G4/30 , C04B35/468
CPC classification number: H01G4/1209 , C04B35/4682 , H01G4/30 , C04B2235/3206 , C04B2235/3224 , C04B2235/3236 , C04B2235/3418 , C04B2235/442 , C04B2235/768
Abstract: A dielectric composition includes a main phase and segregation phases each including RE (at least one rare earth element). The main phase includes a main component having a perovskite crystal structure of ABO3 (A is one or more selected from Ba, Sr, and Ca, and B is one or more selected from Ti, Zr, and Hf). The segregation phases are classified into first segregation phases whose atomic ratio of Si to RE is 0 or more and 0.20 or less and second segregation phases whose atomic ratio of Si to the RE is more than 0.20. 0≤S1/S2≤0.10 is satisfied on a cross section of the dielectric composition, where S1 is an area ratio of the first segregation phases, and S2 is an area ratio of the second segregation phases. An atomic ratio of Si to RE in the second segregation phases is 0.80 or less on average.
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公开(公告)号：US11823839B2
公开(公告)日：2023-11-21
申请号：US17569617
申请日：2022-01-06
Applicant: TDK CORPORATION
Inventor： Kosuke Takano , Toshihiko Kaneko , Nobuto Morigasaki , Yasushi Kawashima , Momoyo Sasaki
Abstract: An electronic component includes an element body having a functional layer and an internal electrode layer, and an external electrode formed on a surface of the element body and connected to the internal electrode layer electrically. The chlorine concentration of the element body of the electronic component is 10 ppm or less.
