公开(公告)号：US20150036262A1

公开(公告)日：2015-02-05

申请号：US14445894

申请日：2014-07-29

Applicant: TDK Corporation

Inventor： Nobutaka KAI ,  Yasuhiro OKUI ,  Satoru KINDAICHI ,  Hideki KANEKO ,  Tatsuya KOJIMA ,  Akitoshi YOSHII

IPC: H01G4/12 ,  H01G4/30

CPC classification number: H01G4/1209 ,  H01G4/1218 ,  H01G4/1236 ,  H01G4/30

Abstract: A multilayer ceramic electronic device comprising a lamination in which an internal electrode layer 3 and a dielectric layer 2 are laminated alternatively, wherein the dielectric layer 2 is comprised of a dielectric ceramic composition including a main component represented by a general formula of ABO3 and a rare-earth component R, and segregation phases 5 including the rare-earth component R are present in the dielectric layer 2. When the dielectric layer 2 is separated to six areas by dividing the dielectric layer 2 sandwiched by a pair of the internal dielectric layers 3 in the thickness direction, there are the R segregation phases present in two neighboring areas 2a respectively adjacent to the pair of the internal electrode layers 3 in the dielectric layer 3 at a ratio of double or more compared with the R segregation phases present in two central areas 2b located at a substantially center in the dielectric layer 2.

Abstract translation: 一种多层陶瓷电子器件，包括层叠体，其中内部电极层3和电介质层2交替层叠，其中介电层2由包含由通式ABO 3表示的主要成分和稀有金属的介电陶瓷组合物组成 - 电介质层2中存在包含稀土类成分R的偏析相5.当通过将介电层2夹在一对内部电介质层3之间的介电层2分开来将电介质层2分离为6个区域时 在厚度方向上，在与介电层3中的一对内部电极层3相邻的两个相邻区域2a中存在R偏析相，其比例为两倍以上，与存在于两个中心的R偏析相比较 位于电介质层2中的大致中心的区域2b。