US 12,073,987 B2
Multilayer coil component
Shun Takai, Nagaokakyo (JP); and Atsuo Hirukawa, Nagaokakyo (JP)
Assigned to Murata Manufacturing Co., Ltd., Kyoto-fu (JP)
Filed by Murata Manufacturing Co., Ltd., Kyoto-fu (JP)
Filed on Dec. 23, 2020, as Appl. No. 17/133,496.
Claims priority of application No. 2019-238915 (JP), filed on Dec. 27, 2019.
Prior Publication US 2021/0202163 A1, Jul. 1, 2021
Int. Cl. H01F 27/32 (2006.01); H01F 17/00 (2006.01); H01F 27/29 (2006.01)
CPC H01F 27/324 (2013.01) [H01F 17/0013 (2013.01); H01F 27/292 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A multilayer coil component comprising:
an insulator portion;
a coil embedded in the insulator portion and including a plurality of coil conductor layers electrically connected together; and
an outer electrode disposed on a surface of the insulator portion and electrically connected to the coil,
wherein the insulator portion is a multilayer body including first insulator layers and second insulator layers,
at least one of the coil conductor layers and at least one of the second insulator layers are disposed adjacent to at least one of the first insulator layers, with the at least one of the second insulator layers contacting the at least one of the first insulator layers, and at least one void existing between the at least one of the first insulator layers and at least a portion of the at least one of the coil conductor layers,
when a thickness of the first insulator layer is a, a thickness of the coil conductor layer is b, and a thickness of the void is c,
a ratio of c to b (c/b) is 0.10 to 0.70, and
a ratio of a to b (a/b) is 0.25 to 1.00, and
the void exists on only one surface of the portion of the at least one of the coil conductor layers.