MULTILAYER CERAMIC CAPACITOR AND MANUFACTURING METHOD THEREOF

• Main Authors: NISHIKAWA JUN, UEDA SHUSAKU
• Format: Patent
• Language: English; Japanese
• Published: 15.11.2018
• 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 which can make the difference among shrinking behaviors adequately small, and a method for manufacturing the multilayer ceramic capacitor.SOLUTION: A multilayer ceramic capacitor comprises a laminate structure arranged by alternately laminating dielectric layers including a ceramic as a primary component and internal electrode layers, having a substantially rectangular parallelepiped shape, and formed so that the internal electrode layers thus laminated are alternately exposed from opposing two end faces. At least one margin area of an end margin area where the internal electrode layers exposed from one end face are opposed to each other through no internal electrode layer exposed from the different end face in the laminate structure, and a side margin area provided so as to cover end portions of the laminated internal electrode layers, which extend to two side faces other than the two end faces in the laminate structure is lower in a rare earth element concentration to the ceramic primary component, and higher in a total concentration of Si and B in comparison to a capacitance region where internal electrode layers exposed from different end faces are opposed to each other in the laminate structure.SELECTED DRAWING: Figure 1 【課題】 収縮挙動の差を十分に小さくすることができる積層セラミックコンデンサおよびその製造方法を提供する。【解決手段】 積層セラミックコンデンサは、セラミックを主成分とする誘電体層と、内部電極層と、が交互に積層され、略直方体形状を有し、積層された複数の内部電極層が交互に対向する２端面に露出するように形成された積層構造を備え、積層構造において同じ端面に露出する内部電極層同士が異なる端面に露出する内部電極層を介さずに対向するエンドマージン領域、および積層構造において積層された複数の内部電極層が２端面以外の２側面に延びた端部を覆うように設けられたサイドマージン領域のうち、少なくとも一方のマージン領域は、積層構造において異なる端面に露出する内部電極層同士が対向する容量領域と比較して、主成分セラミックに対する希土類元素濃度が低くかつＳｉ，Ｂの合計濃度が高いことを特徴とする。【選択図】 図１