CAPACITOR

• Main Authors: MURAKAMI KENJI, SATO MOTOHIKO, ICHIYANAGI SEIJI, YAMAMOTO HIROSHI, TSURUMI TAKAAKI
• Format: Patent
• Language: English; Japanese
• Published: 13.04.2017
• 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 capacitor which can suppress the reduction in dielectric loss in a low frequency band.SOLUTION: A capacitor 1 comprises a capacitor part 3 having a first internal electrode layer 15a of a first principal face 3a, making an outermost layer in a lamination direction of the capacitor part, and a second internal electrode layer 15b of a second principal face 3b; and an upside cover layer 7a and a downside cover layer 7b which are arranged on the upside (outside in a thickness direction thereof) of the first internal electrode layer, and the downside (outside in the thickness direction) of a second internal electrode layer 15b of the second principal face respectively, provided that the upside and downside cover layers allow no lithium ion to pass therethrough. Specifically, the upside cover layer 7a covers the first internal electrode layer 15a serving to form the first principal face 3a, and the downside cover layer 7b covers the second internal electrode layer 15b serving to form the second principal face 3b.SELECTED DRAWING: Figure 2 【課題】低い周波数帯における誘電損失の低下を抑制できるキャパシタを提供すること。【解決手段】キャパシタ１は、キャパシタ部３の積層方向の最外層である第１主面３ａの第１内部電極層１５ａの上側（厚み方向の外側）と、第２主面３ｂの第２内部電極層１５ｂの下側（厚み方向の外側）に、それぞれリチウムイオンを通さない上側カバー層７ａと下側カバー層７ｂとを配置している。つまり、上側カバー層７ａは、第１主面３ａを構成する第１内部電極層１５ａを被覆するとともに、下側カバー層７ｂは、第２主面３ｂを構成する第２内部電極層１５ｂを被覆している。【選択図】図２