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1. 发明授权

US11834379B2 Ceramic raw material powder, multilayer ceramic capacitor and manufacturing method of multilayer ceramic capacitor 有权
公开(公告)号：US11834379B2
公开(公告)日：2023-12-05
申请号：US17578249
申请日：2022-01-18
申请人： TAIYO YUDEN CO., LTD.
发明人： Katsuya Taniguchi , Tsuyoshi Sogabe
IPC分类号： C04B35/468 , H01G4/12 , H01G4/012 , H01G4/30
CPC分类号： C04B35/4682 , H01G4/012 , H01G4/1227 , H01G4/30 , C04B2235/3256 , C04B2235/3262
摘要： Ceramic raw material powder includes: a main phase having a perovskite structure, wherein elements acting as a donor and an acceptor are solid-solved in B sites of the perovskite structure, wherein a first relationship of value A value B is satisfied in a circumference region of each grain of the ceramic raw material powder, and value A in the second relationship gradually decreases from the circumference region to the center, wherein value A is a value of (concentration of the element acting as a donor)×(valence of the element acting as a donor−4), and value B is a value of (concentration of the element acting as an acceptor)×(4−valence of the element acting as an acceptor).

2. 发明授权

US10431383B2 Multilayer ceramic capacitor 有权
公开(公告)号：US10431383B2
公开(公告)日：2019-10-01
申请号：US15456991
申请日：2017-03-13
申请人： TAIYO YUDEN CO., LTD.
发明人： Koichiro Morita , Katsuya Taniguchi , Minoru Ryu , Yoshiki Iwazaki
IPC分类号： H01G4/30 , H01G4/012 , H01G4/12 , H01G4/232
摘要： A multilayer ceramic capacitor includes: a pair of external electrodes; a first internal electrode containing a base metal and coupled to one of the pair external electrodes; a dielectric layer stacked on the first internal electrode and containing a ceramic material and the base metal; and a second internal electrode stacked on the dielectric layer, containing the base metal, and coupled to another one of the external electrodes, wherein a concentration of the base metal in each of five regions, which are equally divided regions of a region between locations 50 nm away from the first and second internal electrodes in a stacking direction between the first and second internal electrodes, is within ±20% of an average of the concentrations of the base metal in the five regions, and thicknesses of the first internal electrode and the second internal electrode are 0.2 μm or greater.

3. 发明授权

US10163569B2 Multilayer ceramic capacitor 有权
公开(公告)号：US10163569B2
公开(公告)日：2018-12-25
申请号：US15456962
申请日：2017-03-13
申请人： TAIYO YUDEN CO., LTD.
发明人： Koichiro Morita , Minoru Ryu , Katsuya Taniguchi , Yoshiki Iwazaki
IPC分类号： H01G4/30 , H01G4/232 , H01G4/012 , H01G4/12
摘要： A multilayer ceramic capacitor includes: a pair of external electrodes; a first internal electrode containing a base metal and coupled to one of the external electrodes; a dielectric layer stacked on the first internal electrode and containing a ceramic material and the base metal; and a second internal electrode stacked on the dielectric layer, containing the base metal, and coupled to another one of the external electrodes, wherein a concentration of the base metal in each of five regions is within ±20% of an average of the concentrations of the base metal in the five regions, the five regions being obtained by dividing a region from a location 50 nm away from the first internal electrode of the dielectric layer to a location 50 nm away from the second internal electrode of the dielectric layer in a stacking direction between the first and second internal electrodes equally into five.

4. 发明授权

US12014877B2 Ceramic electronic device and manufacturing method of the same 有权
公开(公告)号：US12014877B2
公开(公告)日：2024-06-18
申请号：US16915979
申请日：2020-06-29
申请人： TAIYO YUDEN CO., LTD.
发明人： Katsuya Taniguchi
IPC分类号： H01G4/30 , C04B35/468 , H01G4/008 , H01G4/012 , H01G4/12
CPC分类号： H01G4/30 , C04B35/4682 , H01G4/008 , H01G4/012 , H01G4/1218 , C04B2235/6583 , C04B2235/783
摘要： A ceramic electronic device includes: a multilayer structure; and a cover layer, wherein a concentration of Mn of the cover layer with respect to a main component ceramic is larger than a concentration of Mn of the dielectric layers with respect to a main component ceramic in a capacity section, wherein an average crystal grain diameter of a first dielectric layer is smaller than that of a second dielectric layer, and a concentration of Mn of the first dielectric layer with respect to the main component ceramic is larger than a concentration of Mn of the second dielectric layer with respect to the main component ceramic, in the capacity section.

5. 发明授权

US11961674B2 Multilayer ceramic capacitor and ceramic material powder 有权
公开(公告)号：US11961674B2
公开(公告)日：2024-04-16
申请号：US17179180
申请日：2021-02-18
申请人： TAIYO YUDEN CO., LTD.
发明人： Katsuya Taniguchi , Tsuyoshi Sogabe
IPC分类号： H01G4/30 , H01G4/012 , H01G4/12 , H01G4/228
CPC分类号： H01G4/1209 , H01G4/012 , H01G4/228 , H01G4/30
摘要： A multilayer ceramic capacitor includes: a multilayer structure in which dielectric layers and internal electrode layers are alternately stacked; wherein a main component of the dielectric layers is a ceramic material having a main phase having a perovskite structure (ABO3) wherein a B site includes an element solid-solved in the B site and acting as a donor; wherein an A site and the B site of the ceramic material includes a rare earth element, wherein (an amount of the rare earth element substitutionally solid-solved in the A site)/(an amount of the rare earth element substitutionally solid-solved in the B site) is 0.75 or more and 1.25 or less. The amount of the element acting as the donor in the B site is 0.05 to 0.3 atm % relative to a main component element of the B site.

6. 发明授权

US09418792B2 Multilayer ceramic capacitor 有权
标题翻译：多层陶瓷电容器
公开(公告)号：US09418792B2
公开(公告)日：2016-08-16
申请号：US14234954
申请日：2013-03-06
申请人： TAIYO YUDEN CO., LTD.
发明人： Yukihiro Konishi , Yuichi Kasuya , Jun Nishikawa , Katsuya Taniguchi , Kotaro Mizuno , Yusuke Kowase , Shohei Kitamura
IPC分类号： H01G4/30 , H01G4/12 , H01G4/005
CPC分类号： H01G4/30 , H01G4/005 , H01G4/1218 , H01G4/1245
摘要： A multilayer ceramic capacitor includes ceramic grains forming a dielectric layer of the multilayer ceramic capacitor, which ceramic grains contain a coarse ceramic grain SPr having a coarse grain size Dcoa that satisfies the condition of Tmin ≦Dcoa ≦Tmax where Tmax is the maximum thickness of the dielectric layer and Tmin is the minimum thickness of the dielectric layer. The multilayer ceramic capacitor is capable of inhibiting deterioration of capacitance and capacity-temperature characteristics even when the internal electrode layer is made thin.
摘要翻译：多层陶瓷电容器包括形成多层陶瓷电容器的电介质层的陶瓷颗粒，该陶瓷颗粒含有具有粗晶粒度Dcoa的粗陶瓷颗粒SPr，其满足条件Tmin≤Dcoa≤Tmax，其中Tmax为最大厚度电介质层和Tmin是介电层的最小厚度。即使当内部电极层变薄时，多层陶瓷电容器也能够抑制电容和容量 - 温度特性的劣化。

7. 发明授权

US10957485B2 Multilayer ceramic capacitor and ceramic material powder 有权
公开(公告)号：US10957485B2
公开(公告)日：2021-03-23
申请号：US16286356
申请日：2019-02-26
申请人： TAIYO YUDEN CO., LTD.
发明人： Katsuya Taniguchi , Tsuyoshi Sogabe
IPC分类号： H01G4/30 , H01G4/12 , H01G4/228 , H01G4/012
摘要： A multilayer ceramic capacitor includes: a multilayer structure in which each of a plurality of dielectric layers and each of internal electrode layers are alternately stacked; wherein a main component of the dielectric layers is a ceramic material, wherein a main phase of the ceramic material has a perovskite structure expressed by a general formula ABO3, wherein a B site of the ceramic material includes an element acting as a donor; wherein an A site and the B site of the ceramic material includes a rare earth element, wherein (an amount of the rare earth element substitutionally solid-solved in the A site)/(an amount of the rare earth element substitutionally solid-solved in the B site) is 0.75 or more and 1.25 or less.

8. 发明授权

US09666371B2 Multilayer ceramic capacitor 有权
公开(公告)号：US09666371B2
公开(公告)日：2017-05-30
申请号：US15002324
申请日：2016-01-20
申请人： TAIYO YUDEN CO., LTD.
发明人： Koichiro Morita , Chie Kawamura , Minoru Ryu , Katsuya Taniguchi , Kazumichi Hiroi , Yoshiki Iwazaki
IPC分类号： H01G4/12 , C04B35/468 , H01G4/30 , C04B35/626
CPC分类号： H01G4/1227 , C04B35/4682 , C04B35/62685 , C04B2235/3206 , C04B2235/3215 , C04B2235/3224 , C04B2235/3232 , C04B2235/3251 , C04B2235/3256 , C04B2235/3258 , C04B2235/3262 , C04B2235/3418 , C04B2235/5409 , C04B2235/663 , C04B2235/75 , C04B2235/781 , C04B2235/786 , C04B2235/85 , H01G4/30
摘要： A multilayer ceramic capacitor has a laminate comprising dielectric layers stacked alternately with internal electrode layers of different polarities, wherein: the dielectric layers contain ceramic grains whose primary component is BaTiO3; the ceramic grains contain at least one type of donor element (D) selected from the group that includes Nb, Mo, Ta, and W, and at least one type of acceptor element (A) selected from the group that includes Mg and Mn; and the ratio of the concentration of the donor element (D) and that of the acceptor element (A) (D/A) is greater than 1 at the center parts of the ceramic grains, while the D/A ratio is less than 1 at the outer edge parts of the ceramic grains (if A=0, then D/A=∞ and D=A=0 never occurs).

9. 发明申请

US20160217924A1 MULTILAYER CERAMIC CAPACITOR 有权
标题翻译：多层陶瓷电容器
公开(公告)号：US20160217924A1
公开(公告)日：2016-07-28
申请号：US15002324
申请日：2016-01-20
申请人： TAIYO YUDEN CO., LTD.
发明人： Koichiro Morita , Chie Kawamura , Minoru Ryu , Katsuya Taniguchi , Kazumichi Hiroi , Yoshiki Iwazaki
IPC分类号： H01G4/12 , H01G4/012 , H01G4/248 , H01G4/30
CPC分类号： H01G4/1227 , C04B35/4682 , C04B35/62685 , C04B2235/3206 , C04B2235/3215 , C04B2235/3224 , C04B2235/3232 , C04B2235/3251 , C04B2235/3256 , C04B2235/3258 , C04B2235/3262 , C04B2235/3418 , C04B2235/5409 , C04B2235/663 , C04B2235/75 , C04B2235/781 , C04B2235/786 , C04B2235/85 , H01G4/30
摘要： A multilayer ceramic capacitor has a laminate comprising dielectric layers stacked alternately with internal electrode layers of different polarities, wherein: the dielectric layers contain ceramic grains whose primary component is BaTiO3; the ceramic grains contain at least one type of donor element (D) selected from the group that includes Nb, Mo, Ta, and W, and at least one type of acceptor element (A) selected from the group that includes Mg and Mn; and the ratio of the concentration of the donor element (D) and that of the acceptor element (A) (D/A) is greater than 1 at the center parts of the ceramic grains, while the D/A ratio is less than 1 at the outer edge parts of the ceramic grains (if A=0, then D/A=∞ and D=A=0 never occurs).
摘要翻译：多层陶瓷电容器具有包含与不同极性的内部电极层交替堆叠的电介质层的层叠体，其中：所述电介质层含有主要成分为BaTiO 3的陶瓷晶粒; 陶瓷晶粒含有选自包括Nb，Mo，Ta和W的基团中的至少一种施主元素（D），以及选自包括Mg和Mn的基团中的至少一种受主元素（A）并且在陶瓷晶粒的中心部分，施主元素（D）与受主元素（A）的浓度比（D / A）的比例大于1，而D / A比小于1 在陶瓷晶粒的外缘部分（如果A = 0，则D / A =∞，D = A = 0不会发生）。

10. 发明授权

US09177726B2 Multilayer ceramic capacitor 有权
标题翻译：多层陶瓷电容器
公开(公告)号：US09177726B2
公开(公告)日：2015-11-03
申请号：US14066465
申请日：2013-10-29
申请人： TAIYO YUDEN CO., LTD.
发明人： Koichiro Morita , Katsuya Taniguchi
IPC分类号： H01G4/12 , H01G4/30
CPC分类号： H01G4/30 , H01G4/12 , H01G4/1209
摘要： With a multilayer ceramic capacitor whose average grain size of the dielectric grains present at the outermost layer position P1 in the laminate is given by D1, average grain size of the dielectric grains present at the center position P2 in the laminate is given by D2, and average grain size of the dielectric grains present at the 25%-penetrated position P3 which is a position penetrated into the laminate by 25% is given by D3, growth of the dielectric grains occurring as a result of sintering is partially suppressed in such a way that the relationships of average grain sizes D1, D2, and D3 satisfy the conditions of 1.5×D1
摘要翻译：使用层叠体中存在于最外层位置P1处的电介质晶粒的平均粒径为D1的层叠陶瓷电容器，由层叠体中的中心位置P2存在的电介质晶粒的平均粒径为D2，存在于穿透层压体25％的位置的25％穿透位置处的电介质晶粒的平均粒径由D3给出，由烧结而产生的电介质晶粒的生长以这种方式被部分地抑制平均粒径D1，D2和D3的关系满足1.5×D1

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