US 12,272,485 B2
Multilayer coil component
Atsuo Hirukawa, Nagaokakyo (JP); Suradech Nohchai, Nagaokakyo (JP); Shun Takai, Nagaokakyo (JP); and Kenjirou Koshiji, Nagaokakyo (JP)
Assigned to Murata Manufacturing Co., Ltd., Kyoto-fu (JP)
Filed by Murata Manufacturing Co., Ltd., Kyoto-fu (JP)
Filed on Feb. 16, 2022, as Appl. No. 17/673,189.
Claims priority of application No. 2021-023405 (JP), filed on Feb. 17, 2021.
Prior Publication US 2022/0270808 A1, Aug. 25, 2022
Int. Cl. H01F 5/00 (2006.01); H01F 1/34 (2006.01); H01F 27/28 (2006.01); H01F 27/29 (2006.01); H01F 27/32 (2006.01)
CPC H01F 27/2804 (2013.01) [H01F 1/342 (2013.01); H01F 27/29 (2013.01); H01F 27/323 (2013.01); H01F 2027/2809 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A multilayer coil component comprising:
a body including a plurality of insulating layers stacked in a direction of stacking and having first and second end surfaces opposite each other in a length direction, first and second main surfaces opposite each other in a height direction, perpendicular to the length direction, and first and second lateral surfaces opposite each other in a width direction, perpendicular to the length direction and to the height direction;
a coil provided in the body and configured by a plurality of coil conductors electrically connected; and
a first outer electrode extending from at least a portion of the first end surface of the body to a portion of the first main surface and electrically connected to the coil,
wherein the direction of stacking of the insulating layers and a direction of a coil axis of the coil are parallel with the first main surface, which is a mounting surface, of the body;
the first outer electrode includes, in order from a body side, an underlying electrode and a plating electrode on the underlying electrode;
when a boundary is defined that extends parallel with the height and width directions at a midpoint of the body in the length direction, the body has first and second body sections arranged in the length direction with the boundary therebetween, the first body section including the first end surface and the second body section including the second end surface;
when a first reference position is defined that coincides in the height direction with an end of the underlying electrode in the length direction of a portion of the underlying electrode lying on the first main surface of the body, the first body section has first and second regions, the first region including at least a range having a dimension of 20 μm in the length direction from the first reference position toward the second end surface and a second region other than the first region;
in the first region, a percentage by volume of a nonmagnetic phase to a total volume of magnetic phase and nonmagnetic phase is 60% by volume or more; and
in the second region, a percentage by volume of a nonmagnetic phase to a total volume of magnetic phase and nonmagnetic phase is 50% by volume or less.