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公开(公告)号：US11004605B2
公开(公告)日：2021-05-11
申请号：US16259858
申请日：2019-01-28
摘要： A multilayer ceramic capacitor includes: a ceramic multilayer structure having a structure in which each of ceramic dielectric layers and each of internal electrode layers are alternately stacked and are alternately exposed to two edge faces of the ceramic multilayer structure, a main phase of the plurality of ceramic dielectric layers having a perovskite structure that includes Ca and Zr and is expressed by a general formula ABO3; and a pair of external electrodes that are formed on the two edge faces, wherein 300×TE/TA−12≤30 is satisfied when a volume TA is a length CL×a width CW×a thickness CT of the ceramic multilayer structure and a volume TE is a length EL×a width EW×a thickness ET×a stacked number of the plurality of internal electrode layers in a capacity region.
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公开(公告)号：US11996245B2
公开(公告)日：2024-05-28
申请号：US17886976
申请日：2022-08-12
发明人： Eriko Numata , Daisuke Iwai , Shinichi Sasaki , Fumi Mori
摘要： A ceramic electronic component includes: a ceramic body including main surfaces perpendicular to a first axis and end surfaces perpendicular to a second axis; and external electrodes covering the end surfaces and extending from the end surfaces to the main surfaces. The external electrode includes a surface layer portion including a Sn plating layer, and an inner layer portion including a Ni plating layer adjacent to the Sn plating layer and including rounded inner end portions on the main surfaces. In a cross-section perpendicular to a third axis, a ratio t2/t1 is 0.4 or more, where t2 is a thickness in the first axis direction of a portion where an inclination of a tangent line of an outer surface of the inner end portion to each main surface is 45°, and t1 is a maximum thickness in the first axis direction of the inner layer portion on each main surface.
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3.发明授权公开(公告)号：US11011312B2
公开(公告)日：2021-05-18
申请号：US16434003
申请日：2019-06-06
发明人： Daisuke Iwai , Atsuhiro Yanagisawa , Yoshinori Shibata , Masumi Ishii , Takeshi Nosaki , Hiroyuki Moteki
摘要： A multilayer ceramic capacitor includes: a multilayer chip in which each of dielectric layers and each of internal electrode layers are alternately stacked and the internal electrode layers are alternately exposed to two end faces; and external electrodes formed on the two end faces; wherein: the external electrodes have a structure in which a plated layer is formed on a ground layer including Mo; and “M≥0.003185×(Ew×Et)−0.5921 is satisfied when “Et” is a height from a bottom one of the internal electrode layers to a top one of the internal electrode layers, “Ew” is a width of the internal electrode layers in a direction in which side faces of the multilayer chip face with each other, and “M” is a Mo concentration (atm %) with respect to a main component ceramic of a total of the multilayer chip and the pair of external electrodes.
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公开(公告)号：US11967467B2
公开(公告)日：2024-04-23
申请号：US17894535
申请日：2022-08-24
发明人： Fumi Mori , Daisuke Iwai , Shinichi Sasaki
摘要： A multi-layer ceramic electronic component includes a ceramic body and an external electrode. The ceramic body includes a plurality of internal electrodes laminated in one axial direction, and an end surface extending along a plane parallel to the axial direction, at least part of the plurality of internal electrode being drawn from the end surface. The external electrode covers the end surface of the ceramic body. In a thermal desorption spectrum of water of the multi-layer ceramic electronic component by thermal desorption spectroscopy, a ratio P1/P2 of a detection intensity P1 of a first peak in a range of 200° C. to 300° C. to a detection intensity P2 of a second peak in a range of 550° C. to 800° C. is equal to or lower than 11.
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公开(公告)号：US20180151295A1
公开(公告)日：2018-05-31
申请号：US15824747
申请日：2017-11-28
发明人： Daisuke Iwai , Shoji Kusumoto , Yoshinori Shibata , Michio Oshima , Atsuhiro Yanagisawa , Yasushi Inoue
摘要： A multi-layer ceramic capacitor includes: a body including first and second end surfaces facing each other in a uniaxial direction, a first internal electrode drawn to the first end surface, a second internal electrode drawn to the second end surface, a capacitance forming unit including the first and second internal electrodes, and first and second end margins; a first external electrode; and a second external electrode, the multi-layer ceramic capacitor having a dimension of 0.4 mm or less in the uniaxial direction, the multi-layer ceramic capacitor satisfying the following condition: R≥−4.4*ln(S)+2.3, where R (%) represents a proportion of a total dimension of the first and second end margins in the uniaxial direction to a dimension of the body in the uniaxial direction, and S (mm2) represents an area of a cross section of the capacitance forming unit, the cross section being orthogonal to the uniaxial direction.
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