US 11,694,829 B2
Magnetic sheet and wireless power module comprising same
In Seong Sohn, Seoul (KR); Seok Bae, Seoul (KR); and Dong Hyeok Choi, Seoul (KR)
Assigned to LG INNOTEK CO., LTD., Seoul (KR)
Appl. No. 17/56,555
Filed by LG INNOTEK CO., LTD., Seoul (KR)
PCT Filed May 14, 2019, PCT No. PCT/KR2019/005761
§ 371(c)(1), (2) Date Nov. 18, 2020,
PCT Pub. No. WO2019/231142, PCT Pub. Date Dec. 5, 2019.
Claims priority of application No. 10-2018-0061265 (KR), filed on May 29, 2018.
Prior Publication US 2021/0249166 A1, Aug. 12, 2021
Int. Cl. H01F 1/147 (2006.01); H02J 50/10 (2016.01)
CPC H01F 1/14783 (2013.01) [H02J 50/10 (2016.02)] 20 Claims
OG exemplary drawing
 
1. A magnetic sheet comprising:
a first soft magnetic layer including a first surface and a second surface opposite to the first surface;
a first resin layer disposed on the first surface of the first soft magnetic layer and having a first viscosity;
a second soft magnetic layer disposed on the first resin layer; and
a second resin layer disposed between the first soft magnetic layer and the first resin layer and having a second viscosity different from the first viscosity,
wherein the second resin layer includes a plurality of magnetic particles,
the first soft magnetic layer includes a plurality of crack areas propagating from the first surface toward the second surface, and
a part of the second resin layer is disposed in the plurality of crack areas.