公开(公告)号：US20220285097A1

公开(公告)日：2022-09-08

申请号：US17683645

申请日：2022-03-01

Applicant: TDK CORPORATION

Inventor： Toshihiro IGUCHI ,  Yuichiro SUEDA ,  Ryota NAMIKI

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

Abstract: A ceramic electronic device includes an element body and an external electrode. The element body includes a ceramic layer and an internal electrode layer. The external electrode is formed on an end surface of the element body and electrically connected to a part of the internal electrode layer. The ceramic layer includes a perovskite compound represented by ABO3 as a main component. The external electrode includes a baked electrode layer having a first region and a second region. The first region is contacted with the end surface of the element body and located near a joint boundary with the element body. The second region is located outside the first region and constitutes an outer surface of the baked electrode layer. The first region includes a glass frit including at least B, Zn, and Si. The second region includes an oxide having a higher melting point than Cu.

公开(公告)号：US20220285095A1

公开(公告)日：2022-09-08

申请号：US17684944

申请日：2022-03-02

Applicant: TDK CORPORATION

Inventor： Toshihiro IGUCHI ,  Yuichiro SUEDA ,  Ryota NAMIKI ,  Yasuhiro OKUI ,  Atsushi WATANABE

IPC: H01G4/12 ,  H01G4/30 ,  H01G4/232

Abstract: A ceramic electronic device includes an element body and an external electrode. The element body is formed by laminating a ceramic layer and an internal electrode layer. The external electrode is electrically connected to at least one end of the internal electrode layer. The external electrode includes a baked electrode layer. The baked electrode layer includes a first region and a second region. The first region is contacted with an end surface of the element body and located near a joint boundary with the element body. The second region is located outside the first region and constituting an outer surface of the baked electrode layer. The first region includes a first glass having a predetermined composition. The second region includes a second glass having a predetermined composition.