Multilayer ceramic electronic component

• US 8,717,738 B2
• Filed: 09/23/2011
• Issued: 05/06/2014
• Est. Priority Date: 09/28/2010
• Status: Active Grant

• Current Assignee: Murata Manufacturing Co Limited
• Original Assignee: Murata Manufacturing Co Limited
• Inventors: Muraki, Tomonori, Nishioka, Masato, Abe, Tomoro
• Primary Examiner(s): Gandhi, Jayprakash N
• Assistant Examiner(s): Ferguson, Dion
• Application Number:
  US13/241,875
• Publication Number:
  US 20120075766A1
• Time in Patent Office: 956 Days
• Field of Search: 361/303, 361/304.1, 361/301.4
• US Class Current: 361/301.4
• CPC Class Codes: H01G 4/005 Electrodes
• CPC Class Codes: H01G 4/30 Stacked capacitors H01G4/33 takes precedence

Abstract

In a multilayer ceramic electronic component, dummy electrodes are located in margin regions. In a region between an extension line of a side of a facing portion of an internal electrode facing a side surface of an element body and a side of an extending portion of the internal electrode facing the side surface, the dummy electrode is arranged not to extend to the extension line of the side facing the side surface. The dummy electrode includes a plurality of electrode pieces linearly extending in the direction parallel or substantially parallel to the side surface.

Claims

1. A multilayer ceramic electronic component comprising:

an element body including a pair of principal surfaces facing each other, a pair of side surfaces facing each other, and a pair of end surfaces facing each other, rounded chamfer portions located along ridgelines between the side surfaces and the end surfaces, and a plurality of ceramic layers extending in a principal surface direction and laminated in a direction perpendicular or substantially perpendicular thereto and a plurality of pairs of internal electrodes which are provided along interfaces between the ceramic layers, which each include an exposure end exposed to one of the pair of end surfaces, and which are not exposed to the side surfaces;

external electrodes provided at least on the pair of end surfaces of the element body so as to be electrically connected to the exposure ends of the internal electrodes; and

dummy electrodes provided along the interfaces between the ceramic layers;

wherein

each of the internal electrodes includes;

a facing portion including two sides parallel or substantially parallel to the side surfaces of the element body and facing an adjacent internal electrode with at least one of the ceramic layers interposed therebetween; and

an extending portion extending from the facing portion to one of the end surfaces of the element body to define the exposure end at the end of the extending portion;

wherein

a width of the exposure end of the extending portion is smaller than a width of the facing portion when viewed in a width direction between the side surfaces of the element body so as to define margin regions at two sides of the extending portion and between the two sides of the extending portion and the respective side surfaces of the element body;

the dummy electrodes are provided in the margin regions of each of the internal electrodes; and

in regions of the margin regions of each of the internal electrodes between extension lines of the two sides of the facing portion that are parallel or substantially parallel to the side surfaces of the element body and the respective two sides of the extending portion, the dummy electrodes are arranged so as not to extend to the extension lines of the two sides of the facing portion that are parallel or substantially parallel to the side surfaces of the element body.

2. The multilayer ceramic electronic component according to claim 1, wherein a distance between a side of each dummy electrode at a side surface side and the side surface of the element body facing thereto is larger than a distance between a side of the dummy electrode at an extending portion side and the side of the extending portion facing thereto.

3. The multilayer ceramic electronic component according to claim 1, wherein each of the dummy electrodes includes a plurality of electrode pieces linearly extending parallel or substantially parallel to the side surfaces of the element body.