摘要 |
A method of forming a metal coating comprising the steps of: (a) generating an arc at a metal target to create metal ions in a chamber that is under vacuum or has an inert atmosphere; (b) depositing the metal ions on a substrate to form a metal layer thereon; and (c) controlling an amount of gas in the chamber to form a primary metal-gas compound layer on said metal layer and a secondary metal-gas compound layer on said primary metal-gas compound layer, wherein said primary and secondary metal-gas compound layers have different gas atom contents.
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