According to various embodiments of the disclosure, an electronic device may include: a housing, a processor disposed inside the housing, the housing may include a metal member comprising a metal and including a first convex and concave pattern formed in a shape corresponding to a shape of a second convex and concave pattern formed on a jig, wherein the jig is formed for use in electro chemical machining (ECM), and the first convex and concave pattern may have at least a portion formed at a substantially uniform pitch and a substantially uniform height.