US 11,749,441 B2
Core component, method of manufacturing same, and inductor
Hitomi Ochiai, Omihachiman (JP); Masamichi Shingu, Shiga (JP); Yuki Kitagawa, Higashiomi (JP); Hideki Mori, Shiga (JP); and Mitsuya Takayama, Koka (JP)
Assigned to Kyocera Corporation, Kyoto (JP)
Filed by KYOCERA Corporation, Kyoto (JP)
Filed on Jul. 29, 2019, as Appl. No. 16/524,847.
Claims priority of application No. 2019-003548 (JP), filed on Jan. 11, 2019.
Prior Publication US 2020/0227197 A1, Jul. 16, 2020
Int. Cl. H01F 27/255 (2006.01); H01F 27/28 (2006.01); H01F 41/02 (2006.01); B22F 5/10 (2006.01); B28B 3/02 (2006.01); H01F 1/34 (2006.01)
CPC H01F 27/255 (2013.01) [B22F 5/10 (2013.01); H01F 27/2823 (2013.01); H01F 41/0246 (2013.01); B28B 3/02 (2013.01); H01F 1/344 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A core component made of a sintered body of an inorganic powder, the core component comprising:
a columnar winding portion having a first axial end and a second axial end;
a flange portion integrally formed with the columnar winding portion at both axial ends of the columnar winding portion,
wherein a gap C, between adjacent voids in a surface layer portion of the columnar winding portion, is 6 to 12 μm and is represented by the following Formula,
C=L−R  Formula:
wherein the gap C, represented by the Formula, between adjacent voids in the surface layer portion is larger than a gap C, represented by the Formula, between adjacent voids in an inside of the columnar winding portion,
wherein the flange portion has a plurality of voids in the surface layer portion and a plurality of voids in the inside thereof,
where, L is an average value of a distance between the centers of gravity between adjacent voids, and R is an average value of the equivalent circle diameters of voids.