Hybrid metal sheet for magnetic shielding and wireless power transmission module including same

1. A hybrid metal sheet for magnetic field shielding comprising

a first sheet layer made of a ribbon sheet of an amorphous alloy having a first width; and

a plurality of second sheet layers laminated in multiple layers on one surface of the first sheet layer;

wherein the second sheet layer is a sheet layer formed by arranging a plurality of divided sheets of a ribbon sheet of a nano-crystal alloy on the same plane and has a second width narrower than the first width,

wherein the plurality of second sheet layers is arranged such that a plurality of divided sheets for constituting each layer are arranged in the same direction along a width direction or a longitudinal direction of the first sheet layer, and

wherein a boundary region formed between two divided sheets constituting one of a plurality of second sheet layers is continuous or discontinuous with a boundary region formed between the divided sheets constituting another second sheet layer dispose on the upper or lower portion of any one of the second sheet layers.

2. The hybrid metal sheet for magnetic field shielding of claim 1 , wherein the second sheet layer is in the form of a plurality of divided sheets arranged in an m×n matrix structure (where m and n are natural numbers).

3. The hybrid metal sheet for magnetic field shielding of claim 1 , wherein the first sheet layer is disposed only on a side of the second sheet layer.

4. The hybrid metal sheet for magnetic field shielding of claim 3 , wherein the first sheet layer is laminated in multiple layers.

5. The hybrid metal sheet for magnetic field shielding of claim 1 , wherein the plurality of second sheet layers are disposed between the two first sheet layers.

6. The hybrid metal sheet for magnetic field shielding of claim 1 , wherein the plurality of divided sheets for constituting any one of a plurality of second sheet layers is arranged along a first direction and the plurality of divided sheets constituting the second sheet layer disposed on at least one of the upper and lower sides of the one of the second sheet layers is arranged along a second direction different from the first direction.

7. The hybrid metal sheet for magnetic field shielding of claim 1 , wherein the plurality of second sheet layers is stacked in a multilayer of three to ten layers.

8. The hybrid metal sheet for magnetic field shielding of claim 1 , wherein the amorphous alloy is a Fe-based amorphous alloy.

9. A wireless power transmission module comprising:

an antenna unit including at least one antenna for wireless power transmission; and

the hybrid metal sheet for magnetic field shielding of claim 1 disposed on a surface of the antenna unit,

wherein the hybrid metal sheet for magnetic field shielding are comprising:

a first sheet layer made of a ribbon sheet of an amorphous alloy having a first width; and

a plurality of second sheet layers laminated in multiple layers on one surface of the first sheet layer,

wherein the second sheet layer is a sheet layer formed by arranging a plurality of divided sheets of a ribbon sheet of a nano-crystal alloy on the same plane and has a second width narrower than the first width.

10. The wireless power transmission module of claim 9 , wherein the antenna unit further includes at least one other antenna using a different frequency band than the antenna for wireless power transmission.

11. The wireless power transmission module of claim 10 , wherein the other antenna is an NFC antenna or an MST antenna.