公开(公告)号：US10522287B2

公开(公告)日：2019-12-31

申请号：US15984835

申请日：2018-05-21

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Seiji Koga ,  Takashi Omori ,  Jun Ikeda

IPC: H01G4/232 ,  H01G4/30 ,  H01G4/12 ,  H01G4/008 ,  H01G4/012 ,  H01G4/248

Abstract: A multilayer ceramic electronic component in which an interface of an edge region of an external electrode that extends around to a side surface of a ceramic body and the ceramic configuring a surface of the ceramic body, an inorganic matter is present containing 26 mol % or more and less than 45 mol % of SiO2 and having a molar ratio (TiO2+ZrO2)/(SiO2+TiO2+ZrO2) of 0.154 or more, or an inorganic matter is present containing 45 mol % or more of SiO2 and having a molar ratio (TiO2+ZrO2)/(SiO2+TiO2+ZrO2) of 0.022 or more. Furthermore, the inorganic matter may contain B2O3 having a molar ratio relative to SiO2 within 0.25≤B2O3/SiO2≤0.5.

公开(公告)号：US09978519B2

公开(公告)日：2018-05-22

申请号：US15071646

申请日：2016-03-16

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Takashi Omori ,  Seiji Koga ,  Jun Ikeda

IPC: H01G4/228 ,  H01G4/30 ,  H01G4/232 ,  H01G4/008 ,  H01G4/12 ,  H01G4/248

CPC classification number: H01G4/30 ,  H01G4/008 ,  H01G4/0085 ,  H01G4/12 ,  H01G4/1227 ,  H01G4/232 ,  H01G4/2325 ,  H01G4/248

Abstract: A multilayer ceramic electronic component includes a ceramic body having an end surface and a side surface adjacent to thereto such that the end surface and the side surface meet at an edge. The ceramic body has a plurality of internal electrodes with adjacent pairs of the internal electrodes being separated by a respective ceramic layer. An external electrode containing a metal, an inorganic component and voids is electrically connected to at least some of the internal electrodes and both covers the end surface and extends over the edge onto the side surface to form an extending-around portion which extends at least 50 μm onto the side surface as measured in a direction perpendicular to the edge and ends at a leading edge remote from the edge. A portion of the extending-around area which extends 50 μm from the leading edge towards the edge has an average occupancy area ratio which is at least 25 but not greater than 75. The occupancy area ratio is the ratio between the area of the conductive component and an area of the inorganic component on the one hand to the area of the conductive component, the area of the inorganic component and the area of the voids on the other.

公开(公告)号：US09263190B2

公开(公告)日：2016-02-16

申请号：US14541212

申请日：2014-11-14

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Kazuhisa Uchida ,  Yoshito Saito ,  Jun Ikeda

IPC: H01G4/12 ,  H01G4/30 ,  H01G4/012

CPC classification number: H01G4/1227 ,  H01G4/012 ,  H01G4/1218 ,  H01G4/30

Abstract: In a multilayer ceramic capacitor, an inner ceramic layer includes a perovskite-type compound containing Ba and Ti. A region within an electrically effective portion of the inner ceramic layers sandwiched between inner electrodes, which is near an area where inner and outer electrodes connect to each other, is subjected to a mapping analysis using EDS. ((L2−L3)/L1)×100≧50 is satisfied, L1 denotes a total length of ceramic grain boundaries detected from a TEM transmission image, L2 denotes a total length of grain boundaries, detected from a mapping image and the TEM transmission image, where the rare earth element is present, and L3 denotes a total length of portions, detected from a mapping image and the TEM transmission image, in which the grain boundaries where the rare earth element is present and grain boundaries where at least one of Mn, Mg, and Si is present are overlapped.

Abstract translation: 在多层陶瓷电容器中，内部陶瓷层包括含有Ba和Ti的钙钛矿型化合物。 夹在内部电极之间的内部陶瓷层的电学有效部分内的区域，其内部和外部电极彼此连接的区域附近，使用EDS进行映射分析。 （（L2-L3）/ L1）×100≥50，L1表示从TEM透射图像检测出的陶瓷晶界的总长度，L2表示从映射图像和TEM透射检测的晶界的总长度 图像，其中存在稀土元素，L3表示从映射图像和TEM透射图像检测的部分的总长度，其中存在稀土元素的晶界和晶界，其中至少一个 Mn，Mg和Si存在重叠。

公开(公告)号：US20150213959A1

公开(公告)日：2015-07-30

申请号：US14680492

申请日：2015-04-07

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Takashi Omori ,  Seiji Koga ,  Jun Ikeda

IPC: H01G4/30 ,  H01G4/008 ,  H01G4/248 ,  H01G4/12 ,  H01G4/012

CPC classification number: H01G4/30 ,  H01G4/008 ,  H01G4/0085 ,  H01G4/012 ,  H01G4/1209 ,  H01G4/1227 ,  H01G4/2325 ,  H01G4/248

Abstract: A monolithic ceramic electronic component having outer electrodes that include an inorganic substance containing at least Si, a crystal phase C containing at least Si, Ti, and Ba at the interfaces to a ceramic layer in peripheral end portions of the outer electrodes. A value of the crystal phase area ratio indicating the relationship between the area of the crystal phase C and the area of a glass phase G, which are formed at the interface to the ceramic layer, in a region within 5 μm from the peripheral end portion of the outer electrode is within a range of 75% to 98%.

Abstract translation: 一种具有外电极的外置电极的整体式陶瓷电子部件，所述外电极包括至少含有Si的无机物质，至少含有Si，Ti和Ba的结晶相C，在与外部电极的外周端部的陶瓷层的界面处。 表示在与陶瓷层的界面形成的晶相C的面积与玻璃相G的面积之间的关系的晶相面积比在距离周边端部5μm以下的区域中的值 为75％〜98％的范围。