US 12,406,793 B2
Coil component and filter circuit including the same
Atsushi Toujo, Nagaokakyo (JP)
Assigned to MURATA MANUFACTURING CO., LTD., Kyoto (JP)
Filed by Murata Manufacturing Co., Ltd., Nagaokakyo (JP)
Filed on Sep. 9, 2021, as Appl. No. 17/469,995.
Application 17/469,995 is a continuation of application No. PCT/JP2020/036649, filed on Sep. 28, 2020.
Claims priority of application No. 2019-197531 (JP), filed on Oct. 30, 2019.
Prior Publication US 2021/0407728 A1, Dec. 30, 2021
Int. Cl. H01F 27/29 (2006.01); H01F 27/28 (2006.01); H01F 41/04 (2006.01); H03H 7/01 (2006.01)
CPC H01F 27/2804 (2013.01) [H01F 27/29 (2013.01); H01F 41/041 (2013.01); H03H 7/0115 (2013.01); H01F 2027/2809 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A coil component comprising:
first and second coils magnetically coupled with each other;
a ceramic base body including a plurality of ceramic layers stacked on each other, a pair of main surfaces opposing each other, and side surfaces connecting the main surfaces;
at least one first wiring pattern inside the ceramic base body and defining at least a portion of the first coil;
at least one second wiring pattern on a top layer of the first wiring pattern and defining at least a portion of the second coil; and
at least one third wiring pattern between the first and second wiring patterns and including a portion defining a portion of the first coil and a portion defining a portion of the second coil; wherein
each of the first and second wiring patterns has a rectangular or substantially rectangular shape;
at least one of the first and second coils includes at least one combination of wiring patterns that are stacked on each other with a positional displacement so as to include an intersecting portion at which corresponding sides of the wiring patterns intersect with each other as viewed from a direction of the main surfaces;
the first coil includes:
a portion including a plurality of wiring patterns connected in parallel with each other which are provided by electrically connecting a plurality of the first wiring patterns with each other using a first via-conductor; and
a portion including a plurality of wiring patterns connected in parallel with each other which are provided by electrically connecting a plurality of the first wiring patterns with each other and a plurality of the third wiring patterns with each other using second and third via-conductors which pass through the plurality of the first wiring patterns and the plurality of the third wiring patterns;
the second coil includes:
a portion including a plurality of wiring patterns connected in parallel with each other which are provided by electrically connecting a plurality of the second wiring patterns with each other using a fourth via-conductor; and
a portion including a plurality of wiring patterns connected in parallel with each other which are provided by electrically connecting a plurality of the second wiring patterns with each other and a plurality of the third wiring patterns with each other using fifth and sixth via-conductors which pass through the plurality of the second wiring patterns and the plurality of the third wiring patterns; and
the ceramic base body includes:
a first electrode electrically connected to the plurality of first wiring patterns;
a second electrode electrically connected to the plurality of second wiring patterns; and
a third electrode electrically connected to the plurality of third wiring patterns which are connected to a plurality of wiring patterns connected with each other by a seventh via-conductor.