Wireless power receiver and method of manufacturing the same
Disclosed are a wireless power receiver and a method of manufacturing the same. The wireless power receiver includes a first coil to wirelessly receive power, a second coil to make communication, and a first magnetic substrate having first and second recesses spaced apart from each other. The first coil is disposed on the first recess of the first magnetic substrate, and the second coil is disposed on the second recess of a second magnetic substrate.
1. A wireless power receiver comprising:
a first coil to wirelessly receive power;
a second coil to make communication;
a first magnetic substrate having first and second recesses, the first and second recesses spaced apart from each other; and
a second magnetic substrate;
wherein the first coil is disposed on the first recess of the first magnetic substrate, and the second coil is disposed on the second recess of the first magnetic substrate;
wherein the first magnetic substrate has a permeability different from a permeability of the second magnetic substrate, and
wherein the second magnetic substrate has a permeability corresponding to a frequency band used for a signal of the second coil.
2. The wireless power receiver of claim 1 , wherein the first coil comprises at least one first conductive pattern, and the second coil comprises at least one second conductive pattern.
3. The wireless power receiver of claim 2 , wherein a space between adjacent first conductive patterns is empty.
4. The wireless power receiver of claim 2 , wherein a space between adjacent second conductive patterns is empty.
5. The wireless power receiver of claim 2 , wherein a portion of a side surface of an outermost conductive pattern of the at least one first conductive pattern makes contact with a first side surface of the second magnetic substrate.
6. The wireless power receiver of claim 5 , wherein a portion of a side surface of an outermost conductive pattern of the at least one second conductive pattern makes contact with a second side surface of the second magnetic substrate, the second side surface of the second magnetic substrate being opposite to the first side surface of the second magnetic substrate.
7. The wireless power receiver of claim 1 , wherein the first coil has a thickness equal to a first depth of the first recess.
8. The wireless power receiver of claim 1 , wherein the second coil has a thickness equal to a second depth of the second recess.
9. The wireless power receiver of claim 1 , wherein a portion of the second coil protrudes upward from the first magnetic substrate.
10. The wireless power receiver of claim 1 , wherein the second coil surrounds the first coil.
11. The wireless power receiver of claim 1 , wherein the first magnetic substrate is disposed between the first and second coils.
12. The wireless power receiver of claim 1 , wherein the first coil has a spiral structure.
13. The wireless power receiver of claim 1 , wherein the second coil has a square structure.
14. The wireless power receiver of claim 1 , further comprising:
a second magnetic substrate under the first magnetic substrate; and
an adhesive layer between the first and second magnetic substrates.
15. The wireless power receiver of claim 14 , wherein the first and second magnetic substrates comprise particles.
16. The wireless power receiver of claim 14 , wherein the first and second magnetic substrates comprise a magnetic substance having a sandust-type structure.
17. The wireless power receiver of claim 14 , wherein the first magnetic substrate has a permeability greater than a permeability of at least the second magnetic substrate.
18. The wireless power receiver of claim 17 , wherein the permeability of the first magnetic substrate is in a range of about 40 to about 50, and the permeability of the second magnetic substrate is in a range of about 100 to about 130.
19. A method of manufacturing a wireless power receiver, the method comprising:
forming first and second recesses on a first magnetic substrate, the first and second recesses spaced apart from each other;
forming a first coil on the first recess;
forming a second coil on the second recess;
wherein the first magnetic substrate has a permeability different from a permeability of a second magnetic substrate of the wireless power receiver, and
wherein the second magnetic substrate has a permeability corresponding to a frequency band used for a signal of the second coil.
20. The method of claim 19 , further comprising attaching a second magnetic substrate to the first magnetic substrate by using an adhesive layer, before forming the first and second recesses.