公开(公告)号：US11043329B2

公开(公告)日：2021-06-22

申请号：US16027742

申请日：2018-07-05

Applicant: TDK CORPORATION

Inventor： Hitoshi Ohkubo ,  Masazumi Arata ,  Takahiro Kawahara ,  Hokuto Eda ,  Hiroki Tsujiai

IPC: H01F27/28 ,  H01F27/32 ,  H01F41/04 ,  H01F27/29 ,  H01F17/04 ,  H01F17/00 ,  H05K1/16 ,  H05K1/18

Abstract: In a planar coil element, a dead space in a non-overlapping region is reduced by designing a total width of a first resin wall and a first turn located in the non-overlapping region to be narrow, more specifically, by designing the total width to be narrower than a total width of a second turn outside the first turn and a second resin wall located inside the turn and also than a total width of a third turn on the outer side and a third resin wall located inside the turn. As a result, a volume of a magnetic element body in a magnetic core portion of a coil can be increased, and an, inductance value, which is a magnetic characteristic, can also be improved.