Cover for electronic device, antenna assembly, electronic device, and method for manufacturing the same

1. A cover for an electronic device, the cover comprising:

a plate integrally formed of a first metal region and a second metal region;

an insulating region formed in the plate, and configured to electrically separate the first metal region and the second metal region from each other; and

an antenna radiation part arranged in the second metal region,

wherein the insulating region is formed by demetallizing a portion of the plate.

2. The cover of claim 1 , wherein the metal is formed by at least one among deposition, plating, and painting processes.

3. The cover of claim 1 , wherein the metal comprises at least one from a group consisting of aluminum, magnesium, zinc, titanium, stainless steel, and iron.

4. The cover of claim 1 , wherein the metal oxidation process is an anodizing process.

5. The cover of claim 1 , wherein the antenna radiation part is electromagnetically coupled to an internal antenna of the electronic device.

6. The cover of claim 1 , wherein the antenna radiation part is electrically coupled to an electric circuit of the electronic device.

7. The cover of claim 1 , wherein the antenna radiation part comprises an antenna pattern formed by the metal oxidation.

8. The cover of claim 1 , wherein the insulating region comprises:

a concave recess having a concave shape disposed along the boundary between the first metal region and the second metal region; and

a metal oxide layer disposed on a surface of the plate in which the concave recess is disposed and extending from an inner lower surface of the concave recess to the surface of the plate.

9. The cover of claim 1 , wherein the insulating region has a shape penetrating through the plate from the top surface to the bottom surface of the plate.

10. The cover of claim 1 , further comprising a non-metallic cover disposed on the plate to cover the insulating region.

11. An antenna assembly comprising:

a cover for an electronic device of claim 1 ; and

an antenna module disposed inside the cover for an electronic device.

12. The antenna assembly of claim 11 , wherein a portion of the cover is formed of a metal.

13. A method for manufacturing a cover for an electronic device, the method comprising:

preparing a plate having a first metal region formed of a metal; and

forming an insulating region by demetallizing a portion of the plate to create a second metal region electrically separate from the first metal region,

wherein the plate is integrally formed of the first and second metal regions.

14. The method of claim 13 , further comprising demetallizing a portion of the second metal region to form an antenna radiation part including an antenna pattern formed as a non-oxidized metal region by the demetallized portion.

15. The method of claim 13 , wherein the metal is formed by at least one of deposition, plating, and painting processes.

16. The method of claim 13 , wherein the metal comprises at least one from a group consisting of aluminum, magnesium, zinc, titanium, stainless steel, and iron.

17. The method of claim 13 , wherein the metal oxidation process is an anodizing process.

18. The method of claim 13 , wherein the forming of an insulating region comprises:

forming a concave recess along the boundary between the first metal region and the second metal region; and

demetallizing the metal from an inner lower surface of the concave recess to the surface side of the plate in which the concave recess is formed through metal oxidation to form a metal oxide layer.

19. An electronic device, comprising the cover of claim 1 , wherein the first metal plate is grounded.

20. The electronic device of claim 19 , wherein the electronic device is a smartphone, a TV broadcast receiving set-top box, a notebook computer, or a television set.