Patent ID: 11968816
Assignee: AMOSENSE CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  B  C | IPC B  H

Claim 0:
1. A magnetic field shielding sheet, which is a magnetic field shielding sheet for an antenna that includes a hollow portion formed in a central region and having a predetermined area, and a pattern portion surrounding the hollow portion, the magnetic field shielding sheet comprising:
a sheet body formed as a multi-layer sheet in which a plurality of sheets are stacked in multiple layers with adhesive layers therebetween,
wherein the sheet body is a multi-layer sheet in which the plurality of sheets having a relatively lower magnetic permeability while having a relatively higher surface resistance along a stacking direction are sequentially stacked,
wherein at least one sheet of the plurality of sheets is a sheet including a plurality of penetration portions and multiple cracks extending from the penetration portions, and
wherein the plurality of penetration portions and multiple cracks are formed locally on a partial area of a total area of the sheet so that the total area of the sheet is not separated into multiple pieces.