Patent ID: 8456811

Claim:
A casing having a main body made of a conductive composite material and a local portion located adjacent to a wireless device; wherein the local portion comprises a conductive composite material layer and a non-conductive layer, a thickness of the conductive composite material layer is reduced to be thinner than a thickness of the main body that is immediately adjacent to the conductive composite material layer, signal emitting and signal receiving of the wireless device is not affected by the thickness of the conductive composite material layer of the local portion, the thickness of the conductive composite material layer of the local portion is shortened, and the shortened portion is replaced with a non-conductive material for forming the non-conductive layer, a part of the local portion that has a thickness thinner than a thickness of the adjacent main body is filled with the non-conductive layer, the non-conductive layer is tightly connected with the conductive composite material layer of the local portion and the main body that is immediately adjacent to the non-conductive layer.