公开(公告)号：US20150049413A1

公开(公告)日：2015-02-19

申请号：US14528996

申请日：2014-10-30

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Hiroyuki WADA ,  Kohei SHIMADA ,  Kenji TAKAGI ,  Tomomi KOGA ,  Tomotaka HIRATA ,  Hitoshi NISHIMURA ,  Hiroki AWATA ,  Sui UNO

IPC: H01G4/12 ,  H01G4/30 ,  H01G4/248 ,  H01G4/012 ,  H01G4/224

CPC classification number: H01G4/30 ,  H01G4/012 ,  H01G4/12 ,  H01G4/1209 ,  H01G4/1227 ,  H01G4/1245 ,  H01G4/224 ,  H01G4/248

Abstract: A multilayer ceramic capacitor includes a ceramic main body including an inner layer portion including third ceramic layers and a plurality of inner electrodes arranged at interfaces between the third ceramic layers, and first and second outer layer portions respectively including first and second ceramic layers, the first and second ceramic layers being arranged vertically so as to sandwich the inner layer portion. The third ceramic layers and the first and second outer layer portions contain a perovskite-type compound represented by ABO3 where A contains one or more of Ba, Sr, and Ca, B contains one or more of Ti, Zr, and Hf, and O represents oxygen) as a main component. Where a rare-earth element concentration (CR) in the third ceramic layers is compared to a rare-earth element concentration (Cr) in outermost layer portions including at least outermost surfaces of the first and second outer layer portions, CR>Cr (inclusive of Cr=0).