| CPC H05K 5/04 (2013.01) [B23H 3/00 (2013.01); C25D 11/26 (2013.01); C25D 11/34 (2013.01); G06F 1/1613 (2013.01)] | 12 Claims | 

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               1. An electronic device comprising: 
            a housing; and 
                at least one processor disposed inside the housing, 
                wherein the housing comprises: 
                a metal member comprising a metal including an electro chemical machined first convex and concave pattern formed into a surface of the metal member, and 
                an oxide inclusive coating layer exposed to an outside of the housing and disposed on a surface of the first convex and concave pattern of the metal with a shape corresponding to the shape of the first convex and concave pattern, and 
                wherein the first convex and concave pattern has at least a portion formed at a substantially uniform pitch and a substantially uniform height. 
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