Housing and manufacturing method thereof

[0027] See figure 1 The housing 10 of a preferred embodiment of the present invention includes a base 11 and a color layer 13 formed on the surface of the base 11. The color layer 13 is light blue.

[0028] The material of the base 11 can be stainless steel, glass, ceramic or plastic, preferably stainless steel.

[0029] The color layer 13 can be formed on the surface of the substrate 11 by magnetron sputtering. The color layer 13 includes a titanium oxynitride layer 131 and a chromium oxynitride layer 133 sequentially formed on the surface of the substrate, and the thickness of the color layer 13 is 0.3-1.0 μm. The color layer 13 is intuitively light blue to the naked eye, and its chromaticity area is in the L of the CIE LAB color system. * The coordinates are between 60 and 100, a * The coordinates are between -10 and -8, b * The coordinates are between -15 and -13.

[0030] The mass percentages of the elements in Ti, O and N in the titanium oxynitride layer are 40% to 70%, 25% to 5