US 12,112,882 B2
Magnetic shielding sheet and manufacturing method therefor
Kil Jae Jang, Cheonan-si (KR)
Assigned to AMOSENSE CO., LTD., Cheonan-si (KR)
Appl. No. 17/612,055
Filed by AMOSENSE CO., LTD., Cheonan-si (KR)
PCT Filed Feb. 19, 2021, PCT No. PCT/KR2021/002122
§ 371(c)(1), (2) Date Nov. 17, 2021,
PCT Pub. No. WO2021/167398, PCT Pub. Date Aug. 26, 2021.
Claims priority of application No. 10-2020-0020820 (KR), filed on Feb. 20, 2020; application No. 10-2020-0020821 (KR), filed on Feb. 20, 2020; and application No. 10-2021-0022412 (KR), filed on Feb. 19, 2021.
Prior Publication US 2022/0246348 A1, Aug. 4, 2022
Int. Cl. H01F 27/36 (2006.01); H01F 41/02 (2006.01); H02J 50/10 (2016.01); H05K 9/00 (2006.01)
CPC H01F 27/36 (2013.01) [H01F 41/0266 (2013.01); H02J 50/10 (2016.02); H05K 9/0075 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A magnetic shielding sheet disposed on one surface of an antenna, the magnetic shielding sheet including a hollow part having a predetermined area at a center thereof and an eddy current-reducing pattern part surrounding the hollow part, the magnetic shielding sheet comprising:
a sheet body made of a magnetic material to shield a magnetic field; and
at least one eddy current-reducing pattern part formed in the sheet body to increase resistance of the sheet body so that occurrence of an eddy current is reduced;
wherein the antenna is a combo antenna unit in which a wireless power transmission antenna and a wireless communication antenna configured to surround a periphery of the wireless power transmission antenna are patterned on at least one surface of a circuit board; and
the at least one eddy current-reducing pattern part is located in a region corresponding to the wireless power transmission antenna without being in a region corresponding to the wireless communication antenna among a total area of the sheet body.