| 摘要 |
The watch case has its body fashioned of hard metal of hardness preferably greater than 1400 Vickers. The body is overlaid by a two layer coating. The chemical composition of the two layers is identical and comprises the combination of a metal and an element whose atomic number is less than 9. The first layer is deposited by CVD and the second by PVD. If the metal is titanium and the element nitrogen there is obtained on the body of the scratch proof case a perfectly adhering hard coating of gold color. |
