MULTILAYER CERAMIC CAPACITOR, MULTILAYER CERAMIC CAPACITOR ARRAY INCLUDING THE SAME, AND MULTILAYER CERAMIC CAPACITOR MOUNTING BODY

• Main Authors: SUGITA HIROAKI, KITANO SHOTA, KATSUYAMA TAKANOBU
• Format: Patent
• Language: English; Japanese
• Published: 13.11.2014
• Subjects: BASIC ELECTRIC ELEMENTS; CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES ORLIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE; ELECTRICITY

PROBLEM TO BE SOLVED: To provide a multilayer ceramic capacitor capable of suppressing generation of a crack.SOLUTION: A multilayer ceramic capacitor 1B includes: a lamination part 10; a first and a second outer layer part 6b1, 6b2 in a thickness direction; and a first and a second outer layer part 8b1, 8b2 in a width direction. A thickness t2 of the second outer layer part 6b2 in the thickness direction is larger than a thickness t1 of the second outer layer part 6b1 in the thickness direction. The second outer layer part 6b2 in the thickness direction includes an inner layer 6b21 and an outer layer 6b22. A ceramic dielectric layer 9 of the outer layer 6b22 has a composition ratio of Si to Ti higher than that of a ceramic dielectric layer 3 of the inner layer 6b21. The outer layer 6b22 has high Si percentage content at a boundary P1 with the inner layer 6b21. A thickness T1 of the lamination part 10 is larger than a width W1 of the lamination part 10. Widths w1, w2 of a first outer layer part 8b1 in a width direction and a second outer layer part 8b2 in a width direction are larger than a thickness t1 of the outer layer part 6b1 in the thickness direction. 【課題】クラックの発生が抑制できる積層セラミックコンデンサを提供する。【解決手段】積層セラミックコンデンサ１Ｂは、積層部１０と、厚み方向第１および第２外層部６ｂ１，６ｂ２と、幅方向第１および第２外層部８ｂ１，８ｂ２とを含む。厚み方向第２外層部６ｂ２の厚み寸法ｔ２は、厚み方向第１外層部６ｂ１の厚み寸法ｔ１よりも大きく、厚み方向第２外層部６ｂ２は、内側層６ｂ２１と外側層６ｂ２２とを含む。外側層６ｂ２２のセラミック誘電体層９は、内側層６ｂ２１のセラミック誘電体層３よりもＴｉに対するＳｉの組成比が高く、外側層６ｂ２２は、内側層６ｂ２１との境界部Ｐ１においてＳｉの含有率が高い。積層部１０の厚み寸法Ｔ１は、積層部１０の幅寸法Ｗ１よりも大きく、幅方向第１外層部８ｂ１および幅方向第２外層部８ｂ２の幅寸法ｗ１，ｗ２は、厚み方向第１外層部６ｂ１の厚み寸法ｔ１よりも大きい。【選択図】図１５