US 12,424,382 B2
Method for manufacturing coil component having resin walls
Hitoshi Ohkubo, Tokyo (JP); Masazumi Arata, Tokyo (JP); Manabu Ohta, Tokyo (JP); Shou Kawadahara, Tokyo (JP); Yoshihiro Maeda, Tokyo (JP); Takahiro Kawahara, Tokyo (JP); Hokuto Eda, Tokyo (JP); and Shigeki Sato, Tokyo (JP)
Assigned to TDK CORPORATION, Tokyo (JP)
Filed by TDK CORPORATION, Tokyo (JP)
Filed on Apr. 7, 2021, as Appl. No. 17/224,508.
Application 17/224,508 is a division of application No. 16/555,169, filed on Aug. 29, 2019, granted, now 10,998,130.
Application 16/555,169 is a continuation of application No. 14/951,004, filed on Nov. 24, 2015, granted, now 10,468,184, issued on Nov. 5, 2019.
Claims priority of application No. 2014-241869 (JP), filed on Nov. 28, 2014; application No. 2014-241875 (JP), filed on Nov. 28, 2014; and application No. 2014-241876 (JP), filed on Nov. 28, 2014.
Prior Publication US 2021/0225588 A1, Jul. 22, 2021
Int. Cl. H01F 41/04 (2006.01); H01F 17/00 (2006.01); H01F 27/29 (2006.01)
CPC H01F 41/043 (2013.01) [H01F 17/0013 (2013.01); H01F 27/292 (2013.01); H01F 41/046 (2013.01); H01F 2017/0066 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method for manufacturing a coil component, comprising the steps of:
preparing a substrate having a main surface on which a resin body having a plurality of resin walls is provided;
forming a seed pattern on the main surface of the substrate, the seed pattern not being intentionally formed on the resin walls;
growing a coil on the main surface of the substrate so that a winding part of the coil extends between the resin walls, the winding part being grown according to the seed pattern; and
integrally covering the coil and the resin body, together with the resin walls, provided on the main surface of the substrate with a coating resin comprising a magnetic powder-containing resin,
wherein the plurality of resin walls include a resin wall located outermost, a resin wall adjacent to the resin wall located outermost, a resin wall located innermost and a resin wall adjacent to the resin wall located innermost and the resin wall located innermost is thicker than the resin wall adjacent to the resin wall located innermost,
the substrate and resin walls are separate, and the material of the substrate and the material of the resin walls are different, and
the resin walls are not removed after the coil component is manufactured.