US 11,735,353 B2
Inductor component and method of manufacturing same
Shinya Hirai, Nagaokakyo (JP); Koki Okamura, Nagaokakyo (JP); Akinori Hamada, Nagaokakyo (JP); and Tomohiro Kido, Nagaokakyo (JP)
Assigned to Murata Manufacturing Co., Ltd., Kyoto-fu (JP)
Filed by Murata Manufacturing Co., Ltd., Kyoto-fu (JP)
Filed on Jan. 9, 2019, as Appl. No. 16/243,867.
Claims priority of application No. 2018-017544 (JP), filed on Feb. 2, 2018.
Prior Publication US 2019/0244743 A1, Aug. 8, 2019
Int. Cl. H01F 5/00 (2006.01); H01F 27/28 (2006.01); H01F 27/32 (2006.01); H01F 41/04 (2006.01); H01F 27/24 (2006.01); H01F 41/12 (2006.01); H01F 27/29 (2006.01); H01F 17/00 (2006.01)
CPC H01F 27/2804 (2013.01) [H01F 17/0013 (2013.01); H01F 27/24 (2013.01); H01F 27/29 (2013.01); H01F 27/32 (2013.01); H01F 27/324 (2013.01); H01F 41/041 (2013.01); H01F 41/046 (2013.01); H01F 41/12 (2013.01); H01F 2017/0066 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An inductor component comprising:
an insulating layer containing no magnetic substance;
a spiral wiring formed on a first principal surface of the insulating layer and wound on the first principal surface;
a magnetic layer in direct contact with at least a portion of the spiral wiring;
a first columnar wiring that extends from the spiral wiring in a normal direction of the first principal surface to a first external terminal formed outside the magnetic layer, the first columnar wiring being in direct contact with the first external terminal and an inner circumferential end of the spiral wiring; and
a second columnar wiring that extends from the spiral wiring in the normal direction of the first principal surface to a second external terminal formed outside the magnetic layer, the second columnar wiring being in direct contact with the second external terminal and an outer circumferential end of the spiral wiring, wherein
the magnetic layer is interposed between adjacent turns of the spiral winding,
the first columnar wiring has a uniform width along its entire height in the normal direction of the first principal surface,
the first columnar wiring directly contacts the inner circumferential end of the spiral wiring without a via conductor having a smaller cross-sectional area than the first columnar wiring,
the second columnar wiring has a uniform width along its entire height in the normal direction of the first principal surface, and
the second columnar wiring directly contacts the outer circumferential end of the spiral wiring without a via conductor having a smaller cross-sectional area than the second columnar wiring.