US 11,915,851 B2
Inductor and method for producing the same
Yuichi Tsuchiya, Nagaokakyo (JP); Takumi Arai, Nagaokakyo (JP); Motoki Toyama, Nagaokakyo (JP); and Ryuta Uematsu, Nagaokakyo (JP)
Assigned to Murata Manufacturing Co., Ltd., Kyoto-fu (JP)
Filed by Murata Manufacturing Co., Ltd., Kyoto-fu (JP)
Filed on Oct. 16, 2020, as Appl. No. 17/072,556.
Claims priority of application No. 2019-191103 (JP), filed on Oct. 18, 2019.
Prior Publication US 2021/0118602 A1, Apr. 22, 2021
Int. Cl. H01F 27/28 (2006.01); H01F 1/147 (2006.01); H01F 27/255 (2006.01); H01F 27/29 (2006.01); H01F 41/02 (2006.01); H01F 41/04 (2006.01)
CPC H01F 27/255 (2013.01) [H01F 1/14766 (2013.01); H01F 27/29 (2013.01); H01F 41/0246 (2013.01); H01F 41/04 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An inductor comprising:
an external terminal; and
an element body that includes a magnetic portion containing a magnetic powder and a coil embedded in the magnetic portion,
wherein the magnetic powder has a Vickers hardness of 1000 kgf/mm2 or less, a particle size D50 being 3.53 μm or less at 50% of a cumulative volume in a cumulative particle size distribution on a basis of volume, and a D90/D10 of 19 or less, the D90/D10 being a ratio of a particle size D90 at 90% of a cumulative volume to a particle size D10 at 10% of a cumulative volume, and
in the magnetic portion, a packing density of the magnetic powder on a basis of volume is 60% or greater.